4 Copyright (C) Ronnie Sahlberg 2007
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 3 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, see <http://www.gnu.org/licenses/>.
21 #include "lib/tevent/tevent.h"
22 #include "system/filesys.h"
23 #include "system/time.h"
24 #include "system/network.h"
25 #include "system/wait.h"
28 #include "../include/ctdb_client.h"
29 #include "../include/ctdb_private.h"
31 #include "dlinklist.h"
34 /* list of "ctdb ipreallocate" processes to call back when we have
35 finished the takeover run.
37 struct ip_reallocate_list {
38 struct ip_reallocate_list *next;
39 struct rd_memdump_reply *rd;
42 struct ctdb_banning_state {
44 struct timeval last_reported_time;
48 private state of recovery daemon
50 struct ctdb_recoverd {
51 struct ctdb_context *ctdb;
54 uint32_t num_connected;
55 uint32_t last_culprit_node;
56 struct ctdb_node_map *nodemap;
57 struct timeval priority_time;
58 bool need_takeover_run;
61 struct timed_event *send_election_te;
62 struct timed_event *election_timeout;
63 struct vacuum_info *vacuum_info;
64 TALLOC_CTX *ip_reallocate_ctx;
65 struct ip_reallocate_list *reallocate_callers;
66 TALLOC_CTX *ip_check_disable_ctx;
67 struct ctdb_control_get_ifaces *ifaces;
70 #define CONTROL_TIMEOUT() timeval_current_ofs(ctdb->tunable.recover_timeout, 0)
71 #define MONITOR_TIMEOUT() timeval_current_ofs(ctdb->tunable.recover_interval, 0)
75 ban a node for a period of time
77 static void ctdb_ban_node(struct ctdb_recoverd *rec, uint32_t pnn, uint32_t ban_time)
80 struct ctdb_context *ctdb = rec->ctdb;
81 struct ctdb_ban_time bantime;
83 DEBUG(DEBUG_NOTICE,("Banning node %u for %u seconds\n", pnn, ban_time));
85 if (!ctdb_validate_pnn(ctdb, pnn)) {
86 DEBUG(DEBUG_ERR,("Bad pnn %u in ctdb_ban_node\n", pnn));
91 bantime.time = ban_time;
93 ret = ctdb_ctrl_set_ban(ctdb, CONTROL_TIMEOUT(), pnn, &bantime);
95 DEBUG(DEBUG_ERR,(__location__ " Failed to ban node %d\n", pnn));
101 enum monitor_result { MONITOR_OK, MONITOR_RECOVERY_NEEDED, MONITOR_ELECTION_NEEDED, MONITOR_FAILED};
105 run the "recovered" eventscript on all nodes
107 static int run_recovered_eventscript(struct ctdb_context *ctdb, struct ctdb_node_map *nodemap, const char *caller)
112 tmp_ctx = talloc_new(ctdb);
113 CTDB_NO_MEMORY(ctdb, tmp_ctx);
115 nodes = list_of_active_nodes(ctdb, nodemap, tmp_ctx, true);
116 if (ctdb_client_async_control(ctdb, CTDB_CONTROL_END_RECOVERY,
118 CONTROL_TIMEOUT(), false, tdb_null,
121 DEBUG(DEBUG_ERR, (__location__ " Unable to run the 'recovered' event when called from %s\n", caller));
123 talloc_free(tmp_ctx);
127 talloc_free(tmp_ctx);
132 remember the trouble maker
134 static void ctdb_set_culprit_count(struct ctdb_recoverd *rec, uint32_t culprit, uint32_t count)
136 struct ctdb_context *ctdb = talloc_get_type(rec->ctdb, struct ctdb_context);
137 struct ctdb_banning_state *ban_state;
139 if (culprit > ctdb->num_nodes) {
140 DEBUG(DEBUG_ERR,("Trying to set culprit %d but num_nodes is %d\n", culprit, ctdb->num_nodes));
144 if (ctdb->nodes[culprit]->ban_state == NULL) {
145 ctdb->nodes[culprit]->ban_state = talloc_zero(ctdb->nodes[culprit], struct ctdb_banning_state);
146 CTDB_NO_MEMORY_VOID(ctdb, ctdb->nodes[culprit]->ban_state);
150 ban_state = ctdb->nodes[culprit]->ban_state;
151 if (timeval_elapsed(&ban_state->last_reported_time) > ctdb->tunable.recovery_grace_period) {
152 /* this was the first time in a long while this node
153 misbehaved so we will forgive any old transgressions.
155 ban_state->count = 0;
158 ban_state->count += count;
159 ban_state->last_reported_time = timeval_current();
160 rec->last_culprit_node = culprit;
164 remember the trouble maker
166 static void ctdb_set_culprit(struct ctdb_recoverd *rec, uint32_t culprit)
168 ctdb_set_culprit_count(rec, culprit, 1);
172 /* this callback is called for every node that failed to execute the
175 static void startrecovery_fail_callback(struct ctdb_context *ctdb, uint32_t node_pnn, int32_t res, TDB_DATA outdata, void *callback_data)
177 struct ctdb_recoverd *rec = talloc_get_type(callback_data, struct ctdb_recoverd);
179 DEBUG(DEBUG_ERR, (__location__ " Node %u failed the startrecovery event. Setting it as recovery fail culprit\n", node_pnn));
181 ctdb_set_culprit(rec, node_pnn);
185 run the "startrecovery" eventscript on all nodes
187 static int run_startrecovery_eventscript(struct ctdb_recoverd *rec, struct ctdb_node_map *nodemap)
191 struct ctdb_context *ctdb = rec->ctdb;
193 tmp_ctx = talloc_new(ctdb);
194 CTDB_NO_MEMORY(ctdb, tmp_ctx);
196 nodes = list_of_active_nodes(ctdb, nodemap, tmp_ctx, true);
197 if (ctdb_client_async_control(ctdb, CTDB_CONTROL_START_RECOVERY,
199 CONTROL_TIMEOUT(), false, tdb_null,
201 startrecovery_fail_callback,
203 DEBUG(DEBUG_ERR, (__location__ " Unable to run the 'startrecovery' event. Recovery failed.\n"));
204 talloc_free(tmp_ctx);
208 talloc_free(tmp_ctx);
212 static void async_getcap_callback(struct ctdb_context *ctdb, uint32_t node_pnn, int32_t res, TDB_DATA outdata, void *callback_data)
214 if ( (outdata.dsize != sizeof(uint32_t)) || (outdata.dptr == NULL) ) {
215 DEBUG(DEBUG_ERR, (__location__ " Invalid length/pointer for getcap callback : %u %p\n", (unsigned)outdata.dsize, outdata.dptr));
218 if (node_pnn < ctdb->num_nodes) {
219 ctdb->nodes[node_pnn]->capabilities = *((uint32_t *)outdata.dptr);
224 update the node capabilities for all connected nodes
226 static int update_capabilities(struct ctdb_context *ctdb, struct ctdb_node_map *nodemap)
231 tmp_ctx = talloc_new(ctdb);
232 CTDB_NO_MEMORY(ctdb, tmp_ctx);
234 nodes = list_of_active_nodes(ctdb, nodemap, tmp_ctx, true);
235 if (ctdb_client_async_control(ctdb, CTDB_CONTROL_GET_CAPABILITIES,
239 async_getcap_callback, NULL,
241 DEBUG(DEBUG_ERR, (__location__ " Failed to read node capabilities.\n"));
242 talloc_free(tmp_ctx);
246 talloc_free(tmp_ctx);
250 static void set_recmode_fail_callback(struct ctdb_context *ctdb, uint32_t node_pnn, int32_t res, TDB_DATA outdata, void *callback_data)
252 struct ctdb_recoverd *rec = talloc_get_type(callback_data, struct ctdb_recoverd);
254 DEBUG(DEBUG_ERR,("Failed to freeze node %u during recovery. Set it as ban culprit for %d credits\n", node_pnn, rec->nodemap->num));
255 ctdb_set_culprit_count(rec, node_pnn, rec->nodemap->num);
258 static void transaction_start_fail_callback(struct ctdb_context *ctdb, uint32_t node_pnn, int32_t res, TDB_DATA outdata, void *callback_data)
260 struct ctdb_recoverd *rec = talloc_get_type(callback_data, struct ctdb_recoverd);
262 DEBUG(DEBUG_ERR,("Failed to start recovery transaction on node %u. Set it as ban culprit for %d credits\n", node_pnn, rec->nodemap->num));
263 ctdb_set_culprit_count(rec, node_pnn, rec->nodemap->num);
267 change recovery mode on all nodes
269 static int set_recovery_mode(struct ctdb_context *ctdb, struct ctdb_recoverd *rec, struct ctdb_node_map *nodemap, uint32_t rec_mode)
275 tmp_ctx = talloc_new(ctdb);
276 CTDB_NO_MEMORY(ctdb, tmp_ctx);
278 /* freeze all nodes */
279 nodes = list_of_active_nodes(ctdb, nodemap, tmp_ctx, true);
280 if (rec_mode == CTDB_RECOVERY_ACTIVE) {
283 for (i=1; i<=NUM_DB_PRIORITIES; i++) {
284 if (ctdb_client_async_control(ctdb, CTDB_CONTROL_FREEZE,
289 set_recmode_fail_callback,
291 DEBUG(DEBUG_ERR, (__location__ " Unable to freeze nodes. Recovery failed.\n"));
292 talloc_free(tmp_ctx);
299 data.dsize = sizeof(uint32_t);
300 data.dptr = (unsigned char *)&rec_mode;
302 if (ctdb_client_async_control(ctdb, CTDB_CONTROL_SET_RECMODE,
308 DEBUG(DEBUG_ERR, (__location__ " Unable to set recovery mode. Recovery failed.\n"));
309 talloc_free(tmp_ctx);
313 talloc_free(tmp_ctx);
318 change recovery master on all node
320 static int set_recovery_master(struct ctdb_context *ctdb, struct ctdb_node_map *nodemap, uint32_t pnn)
326 tmp_ctx = talloc_new(ctdb);
327 CTDB_NO_MEMORY(ctdb, tmp_ctx);
329 data.dsize = sizeof(uint32_t);
330 data.dptr = (unsigned char *)&pnn;
332 nodes = list_of_active_nodes(ctdb, nodemap, tmp_ctx, true);
333 if (ctdb_client_async_control(ctdb, CTDB_CONTROL_SET_RECMASTER,
335 CONTROL_TIMEOUT(), false, data,
338 DEBUG(DEBUG_ERR, (__location__ " Unable to set recmaster. Recovery failed.\n"));
339 talloc_free(tmp_ctx);
343 talloc_free(tmp_ctx);
347 /* update all remote nodes to use the same db priority that we have
348 this can fail if the remove node has not yet been upgraded to
349 support this function, so we always return success and never fail
350 a recovery if this call fails.
352 static int update_db_priority_on_remote_nodes(struct ctdb_context *ctdb,
353 struct ctdb_node_map *nodemap,
354 uint32_t pnn, struct ctdb_dbid_map *dbmap, TALLOC_CTX *mem_ctx)
359 nodes = list_of_active_nodes(ctdb, nodemap, mem_ctx, true);
361 /* step through all local databases */
362 for (db=0; db<dbmap->num;db++) {
364 struct ctdb_db_priority db_prio;
367 db_prio.db_id = dbmap->dbs[db].dbid;
368 ret = ctdb_ctrl_get_db_priority(ctdb, CONTROL_TIMEOUT(), CTDB_CURRENT_NODE, dbmap->dbs[db].dbid, &db_prio.priority);
370 DEBUG(DEBUG_ERR,(__location__ " Failed to read database priority from local node for db 0x%08x\n", dbmap->dbs[db].dbid));
374 DEBUG(DEBUG_INFO,("Update DB priority for db 0x%08x to %u\n", dbmap->dbs[db].dbid, db_prio.priority));
376 data.dptr = (uint8_t *)&db_prio;
377 data.dsize = sizeof(db_prio);
379 if (ctdb_client_async_control(ctdb,
380 CTDB_CONTROL_SET_DB_PRIORITY,
382 CONTROL_TIMEOUT(), false, data,
385 DEBUG(DEBUG_ERR,(__location__ " Failed to set DB priority for 0x%08x\n", db_prio.db_id));
393 ensure all other nodes have attached to any databases that we have
395 static int create_missing_remote_databases(struct ctdb_context *ctdb, struct ctdb_node_map *nodemap,
396 uint32_t pnn, struct ctdb_dbid_map *dbmap, TALLOC_CTX *mem_ctx)
399 struct ctdb_dbid_map *remote_dbmap;
401 /* verify that all other nodes have all our databases */
402 for (j=0; j<nodemap->num; j++) {
403 /* we dont need to ourself ourselves */
404 if (nodemap->nodes[j].pnn == pnn) {
407 /* dont check nodes that are unavailable */
408 if (nodemap->nodes[j].flags & NODE_FLAGS_INACTIVE) {
412 ret = ctdb_ctrl_getdbmap(ctdb, CONTROL_TIMEOUT(), nodemap->nodes[j].pnn,
413 mem_ctx, &remote_dbmap);
415 DEBUG(DEBUG_ERR, (__location__ " Unable to get dbids from node %u\n", pnn));
419 /* step through all local databases */
420 for (db=0; db<dbmap->num;db++) {
424 for (i=0;i<remote_dbmap->num;i++) {
425 if (dbmap->dbs[db].dbid == remote_dbmap->dbs[i].dbid) {
429 /* the remote node already have this database */
430 if (i!=remote_dbmap->num) {
433 /* ok so we need to create this database */
434 ctdb_ctrl_getdbname(ctdb, CONTROL_TIMEOUT(), pnn, dbmap->dbs[db].dbid,
437 DEBUG(DEBUG_ERR, (__location__ " Unable to get dbname from node %u\n", pnn));
440 ctdb_ctrl_createdb(ctdb, CONTROL_TIMEOUT(), nodemap->nodes[j].pnn,
441 mem_ctx, name, dbmap->dbs[db].persistent);
443 DEBUG(DEBUG_ERR, (__location__ " Unable to create remote db:%s\n", name));
454 ensure we are attached to any databases that anyone else is attached to
456 static int create_missing_local_databases(struct ctdb_context *ctdb, struct ctdb_node_map *nodemap,
457 uint32_t pnn, struct ctdb_dbid_map **dbmap, TALLOC_CTX *mem_ctx)
460 struct ctdb_dbid_map *remote_dbmap;
462 /* verify that we have all database any other node has */
463 for (j=0; j<nodemap->num; j++) {
464 /* we dont need to ourself ourselves */
465 if (nodemap->nodes[j].pnn == pnn) {
468 /* dont check nodes that are unavailable */
469 if (nodemap->nodes[j].flags & NODE_FLAGS_INACTIVE) {
473 ret = ctdb_ctrl_getdbmap(ctdb, CONTROL_TIMEOUT(), nodemap->nodes[j].pnn,
474 mem_ctx, &remote_dbmap);
476 DEBUG(DEBUG_ERR, (__location__ " Unable to get dbids from node %u\n", pnn));
480 /* step through all databases on the remote node */
481 for (db=0; db<remote_dbmap->num;db++) {
484 for (i=0;i<(*dbmap)->num;i++) {
485 if (remote_dbmap->dbs[db].dbid == (*dbmap)->dbs[i].dbid) {
489 /* we already have this db locally */
490 if (i!=(*dbmap)->num) {
493 /* ok so we need to create this database and
496 ctdb_ctrl_getdbname(ctdb, CONTROL_TIMEOUT(), nodemap->nodes[j].pnn,
497 remote_dbmap->dbs[db].dbid, mem_ctx, &name);
499 DEBUG(DEBUG_ERR, (__location__ " Unable to get dbname from node %u\n",
500 nodemap->nodes[j].pnn));
503 ctdb_ctrl_createdb(ctdb, CONTROL_TIMEOUT(), pnn, mem_ctx, name,
504 remote_dbmap->dbs[db].persistent);
506 DEBUG(DEBUG_ERR, (__location__ " Unable to create local db:%s\n", name));
509 ret = ctdb_ctrl_getdbmap(ctdb, CONTROL_TIMEOUT(), pnn, mem_ctx, dbmap);
511 DEBUG(DEBUG_ERR, (__location__ " Unable to reread dbmap on node %u\n", pnn));
522 pull the remote database contents from one node into the recdb
524 static int pull_one_remote_database(struct ctdb_context *ctdb, uint32_t srcnode,
525 struct tdb_wrap *recdb, uint32_t dbid,
530 struct ctdb_marshall_buffer *reply;
531 struct ctdb_rec_data *rec;
533 TALLOC_CTX *tmp_ctx = talloc_new(recdb);
535 ret = ctdb_ctrl_pulldb(ctdb, srcnode, dbid, CTDB_LMASTER_ANY, tmp_ctx,
536 CONTROL_TIMEOUT(), &outdata);
538 DEBUG(DEBUG_ERR,(__location__ " Unable to copy db from node %u\n", srcnode));
539 talloc_free(tmp_ctx);
543 reply = (struct ctdb_marshall_buffer *)outdata.dptr;
545 if (outdata.dsize < offsetof(struct ctdb_marshall_buffer, data)) {
546 DEBUG(DEBUG_ERR,(__location__ " invalid data in pulldb reply\n"));
547 talloc_free(tmp_ctx);
551 rec = (struct ctdb_rec_data *)&reply->data[0];
555 rec = (struct ctdb_rec_data *)(rec->length + (uint8_t *)rec), i++) {
557 struct ctdb_ltdb_header *hdr;
560 key.dptr = &rec->data[0];
561 key.dsize = rec->keylen;
562 data.dptr = &rec->data[key.dsize];
563 data.dsize = rec->datalen;
565 hdr = (struct ctdb_ltdb_header *)data.dptr;
567 if (data.dsize < sizeof(struct ctdb_ltdb_header)) {
568 DEBUG(DEBUG_CRIT,(__location__ " bad ltdb record\n"));
569 talloc_free(tmp_ctx);
573 /* fetch the existing record, if any */
574 existing = tdb_fetch(recdb->tdb, key);
576 if (existing.dptr != NULL) {
577 struct ctdb_ltdb_header header;
578 if (existing.dsize < sizeof(struct ctdb_ltdb_header)) {
579 DEBUG(DEBUG_CRIT,(__location__ " Bad record size %u from node %u\n",
580 (unsigned)existing.dsize, srcnode));
582 talloc_free(tmp_ctx);
585 header = *(struct ctdb_ltdb_header *)existing.dptr;
587 if (!(header.rsn < hdr->rsn ||
588 (header.dmaster != ctdb->recovery_master && header.rsn == hdr->rsn))) {
593 if (tdb_store(recdb->tdb, key, data, TDB_REPLACE) != 0) {
594 DEBUG(DEBUG_CRIT,(__location__ " Failed to store record\n"));
595 talloc_free(tmp_ctx);
600 talloc_free(tmp_ctx);
606 pull all the remote database contents into the recdb
608 static int pull_remote_database(struct ctdb_context *ctdb,
609 struct ctdb_recoverd *rec,
610 struct ctdb_node_map *nodemap,
611 struct tdb_wrap *recdb, uint32_t dbid,
616 /* pull all records from all other nodes across onto this node
617 (this merges based on rsn)
619 for (j=0; j<nodemap->num; j++) {
620 /* dont merge from nodes that are unavailable */
621 if (nodemap->nodes[j].flags & NODE_FLAGS_INACTIVE) {
624 if (pull_one_remote_database(ctdb, nodemap->nodes[j].pnn, recdb, dbid, persistent) != 0) {
625 DEBUG(DEBUG_ERR,(__location__ " Failed to pull remote database from node %u\n",
626 nodemap->nodes[j].pnn));
627 ctdb_set_culprit_count(rec, nodemap->nodes[j].pnn, nodemap->num);
637 update flags on all active nodes
639 static int update_flags_on_all_nodes(struct ctdb_context *ctdb, struct ctdb_node_map *nodemap, uint32_t pnn, uint32_t flags)
643 ret = ctdb_ctrl_modflags(ctdb, CONTROL_TIMEOUT(), pnn, flags, ~flags);
645 DEBUG(DEBUG_ERR, (__location__ " Unable to update nodeflags on remote nodes\n"));
653 ensure all nodes have the same vnnmap we do
655 static int update_vnnmap_on_all_nodes(struct ctdb_context *ctdb, struct ctdb_node_map *nodemap,
656 uint32_t pnn, struct ctdb_vnn_map *vnnmap, TALLOC_CTX *mem_ctx)
660 /* push the new vnn map out to all the nodes */
661 for (j=0; j<nodemap->num; j++) {
662 /* dont push to nodes that are unavailable */
663 if (nodemap->nodes[j].flags & NODE_FLAGS_INACTIVE) {
667 ret = ctdb_ctrl_setvnnmap(ctdb, CONTROL_TIMEOUT(), nodemap->nodes[j].pnn, mem_ctx, vnnmap);
669 DEBUG(DEBUG_ERR, (__location__ " Unable to set vnnmap for node %u\n", pnn));
679 struct vacuum_info *next, *prev;
680 struct ctdb_recoverd *rec;
682 struct ctdb_db_context *ctdb_db;
683 struct ctdb_marshall_buffer *recs;
684 struct ctdb_rec_data *r;
687 static void vacuum_fetch_next(struct vacuum_info *v);
690 called when a vacuum fetch has completed - just free it and do the next one
692 static void vacuum_fetch_callback(struct ctdb_client_call_state *state)
694 struct vacuum_info *v = talloc_get_type(state->async.private_data, struct vacuum_info);
696 vacuum_fetch_next(v);
701 process the next element from the vacuum list
703 static void vacuum_fetch_next(struct vacuum_info *v)
705 struct ctdb_call call;
706 struct ctdb_rec_data *r;
708 while (v->recs->count) {
709 struct ctdb_client_call_state *state;
711 struct ctdb_ltdb_header *hdr;
714 call.call_id = CTDB_NULL_FUNC;
715 call.flags = CTDB_IMMEDIATE_MIGRATION;
718 v->r = (struct ctdb_rec_data *)(r->length + (uint8_t *)r);
721 call.key.dptr = &r->data[0];
722 call.key.dsize = r->keylen;
724 /* ensure we don't block this daemon - just skip a record if we can't get
726 if (tdb_chainlock_nonblock(v->ctdb_db->ltdb->tdb, call.key) != 0) {
730 data = tdb_fetch(v->ctdb_db->ltdb->tdb, call.key);
731 if (data.dptr == NULL) {
732 tdb_chainunlock(v->ctdb_db->ltdb->tdb, call.key);
736 if (data.dsize < sizeof(struct ctdb_ltdb_header)) {
738 tdb_chainunlock(v->ctdb_db->ltdb->tdb, call.key);
742 hdr = (struct ctdb_ltdb_header *)data.dptr;
743 if (hdr->dmaster == v->rec->ctdb->pnn) {
744 /* its already local */
746 tdb_chainunlock(v->ctdb_db->ltdb->tdb, call.key);
752 state = ctdb_call_send(v->ctdb_db, &call);
753 tdb_chainunlock(v->ctdb_db->ltdb->tdb, call.key);
755 DEBUG(DEBUG_ERR,(__location__ " Failed to setup vacuum fetch call\n"));
759 state->async.fn = vacuum_fetch_callback;
760 state->async.private_data = v;
769 destroy a vacuum info structure
771 static int vacuum_info_destructor(struct vacuum_info *v)
773 DLIST_REMOVE(v->rec->vacuum_info, v);
779 handler for vacuum fetch
781 static void vacuum_fetch_handler(struct ctdb_context *ctdb, uint64_t srvid,
782 TDB_DATA data, void *private_data)
784 struct ctdb_recoverd *rec = talloc_get_type(private_data, struct ctdb_recoverd);
785 struct ctdb_marshall_buffer *recs;
787 TALLOC_CTX *tmp_ctx = talloc_new(ctdb);
789 struct ctdb_dbid_map *dbmap=NULL;
790 bool persistent = false;
791 struct ctdb_db_context *ctdb_db;
792 struct ctdb_rec_data *r;
794 struct vacuum_info *v;
796 recs = (struct ctdb_marshall_buffer *)data.dptr;
797 r = (struct ctdb_rec_data *)&recs->data[0];
799 if (recs->count == 0) {
800 talloc_free(tmp_ctx);
806 for (v=rec->vacuum_info;v;v=v->next) {
807 if (srcnode == v->srcnode && recs->db_id == v->ctdb_db->db_id) {
808 /* we're already working on records from this node */
809 talloc_free(tmp_ctx);
814 /* work out if the database is persistent */
815 ret = ctdb_ctrl_getdbmap(ctdb, CONTROL_TIMEOUT(), CTDB_CURRENT_NODE, tmp_ctx, &dbmap);
817 DEBUG(DEBUG_ERR, (__location__ " Unable to get dbids from local node\n"));
818 talloc_free(tmp_ctx);
822 for (i=0;i<dbmap->num;i++) {
823 if (dbmap->dbs[i].dbid == recs->db_id) {
824 persistent = dbmap->dbs[i].persistent;
828 if (i == dbmap->num) {
829 DEBUG(DEBUG_ERR, (__location__ " Unable to find db_id 0x%x on local node\n", recs->db_id));
830 talloc_free(tmp_ctx);
834 /* find the name of this database */
835 if (ctdb_ctrl_getdbname(ctdb, CONTROL_TIMEOUT(), CTDB_CURRENT_NODE, recs->db_id, tmp_ctx, &name) != 0) {
836 DEBUG(DEBUG_ERR,(__location__ " Failed to get name of db 0x%x\n", recs->db_id));
837 talloc_free(tmp_ctx);
842 ctdb_db = ctdb_attach(ctdb, name, persistent, 0);
843 if (ctdb_db == NULL) {
844 DEBUG(DEBUG_ERR,(__location__ " Failed to attach to database '%s'\n", name));
845 talloc_free(tmp_ctx);
849 v = talloc_zero(rec, struct vacuum_info);
851 DEBUG(DEBUG_CRIT,(__location__ " Out of memory\n"));
852 talloc_free(tmp_ctx);
857 v->srcnode = srcnode;
858 v->ctdb_db = ctdb_db;
859 v->recs = talloc_memdup(v, recs, data.dsize);
860 if (v->recs == NULL) {
861 DEBUG(DEBUG_CRIT,(__location__ " Out of memory\n"));
863 talloc_free(tmp_ctx);
866 v->r = (struct ctdb_rec_data *)&v->recs->data[0];
868 DLIST_ADD(rec->vacuum_info, v);
870 talloc_set_destructor(v, vacuum_info_destructor);
872 vacuum_fetch_next(v);
873 talloc_free(tmp_ctx);
878 called when ctdb_wait_timeout should finish
880 static void ctdb_wait_handler(struct event_context *ev, struct timed_event *te,
881 struct timeval yt, void *p)
883 uint32_t *timed_out = (uint32_t *)p;
888 wait for a given number of seconds
890 static void ctdb_wait_timeout(struct ctdb_context *ctdb, double secs)
892 uint32_t timed_out = 0;
893 time_t usecs = (secs - (time_t)secs) * 1000000;
894 event_add_timed(ctdb->ev, ctdb, timeval_current_ofs(secs, usecs), ctdb_wait_handler, &timed_out);
896 event_loop_once(ctdb->ev);
901 called when an election times out (ends)
903 static void ctdb_election_timeout(struct event_context *ev, struct timed_event *te,
904 struct timeval t, void *p)
906 struct ctdb_recoverd *rec = talloc_get_type(p, struct ctdb_recoverd);
907 rec->election_timeout = NULL;
910 DEBUG(DEBUG_WARNING,(__location__ " Election timed out\n"));
915 wait for an election to finish. It finished election_timeout seconds after
916 the last election packet is received
918 static void ctdb_wait_election(struct ctdb_recoverd *rec)
920 struct ctdb_context *ctdb = rec->ctdb;
921 while (rec->election_timeout) {
922 event_loop_once(ctdb->ev);
927 Update our local flags from all remote connected nodes.
928 This is only run when we are or we belive we are the recovery master
930 static int update_local_flags(struct ctdb_recoverd *rec, struct ctdb_node_map *nodemap)
933 struct ctdb_context *ctdb = rec->ctdb;
934 TALLOC_CTX *mem_ctx = talloc_new(ctdb);
936 /* get the nodemap for all active remote nodes and verify
937 they are the same as for this node
939 for (j=0; j<nodemap->num; j++) {
940 struct ctdb_node_map *remote_nodemap=NULL;
943 if (nodemap->nodes[j].flags & NODE_FLAGS_DISCONNECTED) {
946 if (nodemap->nodes[j].pnn == ctdb->pnn) {
950 ret = ctdb_ctrl_getnodemap(ctdb, CONTROL_TIMEOUT(), nodemap->nodes[j].pnn,
951 mem_ctx, &remote_nodemap);
953 DEBUG(DEBUG_ERR, (__location__ " Unable to get nodemap from remote node %u\n",
954 nodemap->nodes[j].pnn));
955 ctdb_set_culprit(rec, nodemap->nodes[j].pnn);
956 talloc_free(mem_ctx);
957 return MONITOR_FAILED;
959 if (nodemap->nodes[j].flags != remote_nodemap->nodes[j].flags) {
960 /* We should tell our daemon about this so it
961 updates its flags or else we will log the same
962 message again in the next iteration of recovery.
963 Since we are the recovery master we can just as
964 well update the flags on all nodes.
966 ret = ctdb_ctrl_modflags(ctdb, CONTROL_TIMEOUT(), nodemap->nodes[j].pnn, nodemap->nodes[j].flags, ~nodemap->nodes[j].flags);
968 DEBUG(DEBUG_ERR, (__location__ " Unable to update nodeflags on remote nodes\n"));
972 /* Update our local copy of the flags in the recovery
975 DEBUG(DEBUG_NOTICE,("Remote node %u had flags 0x%x, local had 0x%x - updating local\n",
976 nodemap->nodes[j].pnn, remote_nodemap->nodes[j].flags,
977 nodemap->nodes[j].flags));
978 nodemap->nodes[j].flags = remote_nodemap->nodes[j].flags;
980 talloc_free(remote_nodemap);
982 talloc_free(mem_ctx);
987 /* Create a new random generation ip.
988 The generation id can not be the INVALID_GENERATION id
990 static uint32_t new_generation(void)
995 generation = random();
997 if (generation != INVALID_GENERATION) {
1007 create a temporary working database
1009 static struct tdb_wrap *create_recdb(struct ctdb_context *ctdb, TALLOC_CTX *mem_ctx)
1012 struct tdb_wrap *recdb;
1015 /* open up the temporary recovery database */
1016 name = talloc_asprintf(mem_ctx, "%s/recdb.tdb.%u",
1017 ctdb->db_directory_state,
1024 tdb_flags = TDB_NOLOCK;
1025 if (ctdb->valgrinding) {
1026 tdb_flags |= TDB_NOMMAP;
1028 tdb_flags |= TDB_DISALLOW_NESTING;
1030 recdb = tdb_wrap_open(mem_ctx, name, ctdb->tunable.database_hash_size,
1031 tdb_flags, O_RDWR|O_CREAT|O_EXCL, 0600);
1032 if (recdb == NULL) {
1033 DEBUG(DEBUG_CRIT,(__location__ " Failed to create temp recovery database '%s'\n", name));
1043 a traverse function for pulling all relevent records from recdb
1046 struct ctdb_context *ctdb;
1047 struct ctdb_marshall_buffer *recdata;
1053 static int traverse_recdb(struct tdb_context *tdb, TDB_DATA key, TDB_DATA data, void *p)
1055 struct recdb_data *params = (struct recdb_data *)p;
1056 struct ctdb_rec_data *rec;
1057 struct ctdb_ltdb_header *hdr;
1059 /* skip empty records */
1060 if (data.dsize <= sizeof(struct ctdb_ltdb_header)) {
1064 /* update the dmaster field to point to us */
1065 hdr = (struct ctdb_ltdb_header *)data.dptr;
1066 if (!params->persistent) {
1067 hdr->dmaster = params->ctdb->pnn;
1070 /* add the record to the blob ready to send to the nodes */
1071 rec = ctdb_marshall_record(params->recdata, 0, key, NULL, data);
1073 params->failed = true;
1076 params->recdata = talloc_realloc_size(NULL, params->recdata, rec->length + params->len);
1077 if (params->recdata == NULL) {
1078 DEBUG(DEBUG_CRIT,(__location__ " Failed to expand recdata to %u (%u records)\n",
1079 rec->length + params->len, params->recdata->count));
1080 params->failed = true;
1083 params->recdata->count++;
1084 memcpy(params->len+(uint8_t *)params->recdata, rec, rec->length);
1085 params->len += rec->length;
1092 push the recdb database out to all nodes
1094 static int push_recdb_database(struct ctdb_context *ctdb, uint32_t dbid,
1096 struct tdb_wrap *recdb, struct ctdb_node_map *nodemap)
1098 struct recdb_data params;
1099 struct ctdb_marshall_buffer *recdata;
1101 TALLOC_CTX *tmp_ctx;
1104 tmp_ctx = talloc_new(ctdb);
1105 CTDB_NO_MEMORY(ctdb, tmp_ctx);
1107 recdata = talloc_zero(recdb, struct ctdb_marshall_buffer);
1108 CTDB_NO_MEMORY(ctdb, recdata);
1110 recdata->db_id = dbid;
1113 params.recdata = recdata;
1114 params.len = offsetof(struct ctdb_marshall_buffer, data);
1115 params.failed = false;
1116 params.persistent = persistent;
1118 if (tdb_traverse_read(recdb->tdb, traverse_recdb, ¶ms) == -1) {
1119 DEBUG(DEBUG_ERR,(__location__ " Failed to traverse recdb database\n"));
1120 talloc_free(params.recdata);
1121 talloc_free(tmp_ctx);
1125 if (params.failed) {
1126 DEBUG(DEBUG_ERR,(__location__ " Failed to traverse recdb database\n"));
1127 talloc_free(params.recdata);
1128 talloc_free(tmp_ctx);
1132 recdata = params.recdata;
1134 outdata.dptr = (void *)recdata;
1135 outdata.dsize = params.len;
1137 nodes = list_of_active_nodes(ctdb, nodemap, tmp_ctx, true);
1138 if (ctdb_client_async_control(ctdb, CTDB_CONTROL_PUSH_DB,
1140 CONTROL_TIMEOUT(), false, outdata,
1143 DEBUG(DEBUG_ERR,(__location__ " Failed to push recdb records to nodes for db 0x%x\n", dbid));
1144 talloc_free(recdata);
1145 talloc_free(tmp_ctx);
1149 DEBUG(DEBUG_NOTICE, (__location__ " Recovery - pushed remote database 0x%x of size %u\n",
1150 dbid, recdata->count));
1152 talloc_free(recdata);
1153 talloc_free(tmp_ctx);
1160 go through a full recovery on one database
1162 static int recover_database(struct ctdb_recoverd *rec,
1163 TALLOC_CTX *mem_ctx,
1167 struct ctdb_node_map *nodemap,
1168 uint32_t transaction_id)
1170 struct tdb_wrap *recdb;
1172 struct ctdb_context *ctdb = rec->ctdb;
1174 struct ctdb_control_wipe_database w;
1177 recdb = create_recdb(ctdb, mem_ctx);
1178 if (recdb == NULL) {
1182 /* pull all remote databases onto the recdb */
1183 ret = pull_remote_database(ctdb, rec, nodemap, recdb, dbid, persistent);
1185 DEBUG(DEBUG_ERR, (__location__ " Unable to pull remote database 0x%x\n", dbid));
1189 DEBUG(DEBUG_NOTICE, (__location__ " Recovery - pulled remote database 0x%x\n", dbid));
1191 /* wipe all the remote databases. This is safe as we are in a transaction */
1193 w.transaction_id = transaction_id;
1195 data.dptr = (void *)&w;
1196 data.dsize = sizeof(w);
1198 nodes = list_of_active_nodes(ctdb, nodemap, recdb, true);
1199 if (ctdb_client_async_control(ctdb, CTDB_CONTROL_WIPE_DATABASE,
1201 CONTROL_TIMEOUT(), false, data,
1204 DEBUG(DEBUG_ERR, (__location__ " Unable to wipe database. Recovery failed.\n"));
1209 /* push out the correct database. This sets the dmaster and skips
1210 the empty records */
1211 ret = push_recdb_database(ctdb, dbid, persistent, recdb, nodemap);
1217 /* all done with this database */
1224 reload the nodes file
1226 static void reload_nodes_file(struct ctdb_context *ctdb)
1229 ctdb_load_nodes_file(ctdb);
1232 static int ctdb_reload_remote_public_ips(struct ctdb_context *ctdb,
1233 struct ctdb_recoverd *rec,
1234 struct ctdb_node_map *nodemap,
1240 if (ctdb->num_nodes != nodemap->num) {
1241 DEBUG(DEBUG_ERR, (__location__ " ctdb->num_nodes (%d) != nodemap->num (%d) invalid param\n",
1242 ctdb->num_nodes, nodemap->num));
1244 *culprit = ctdb->pnn;
1249 for (j=0; j<nodemap->num; j++) {
1250 /* release any existing data */
1251 if (ctdb->nodes[j]->known_public_ips) {
1252 talloc_free(ctdb->nodes[j]->known_public_ips);
1253 ctdb->nodes[j]->known_public_ips = NULL;
1255 if (ctdb->nodes[j]->available_public_ips) {
1256 talloc_free(ctdb->nodes[j]->available_public_ips);
1257 ctdb->nodes[j]->available_public_ips = NULL;
1260 if (nodemap->nodes[j].flags & NODE_FLAGS_INACTIVE) {
1264 /* grab a new shiny list of public ips from the node */
1265 ret = ctdb_ctrl_get_public_ips_flags(ctdb,
1267 ctdb->nodes[j]->pnn,
1270 &ctdb->nodes[j]->known_public_ips);
1272 DEBUG(DEBUG_ERR,("Failed to read known public ips from node : %u\n",
1273 ctdb->nodes[j]->pnn));
1275 *culprit = ctdb->nodes[j]->pnn;
1280 if (ctdb->tunable.disable_ip_failover == 0) {
1281 if (rec->ip_check_disable_ctx == NULL) {
1282 if (verify_remote_ip_allocation(ctdb, ctdb->nodes[j]->known_public_ips)) {
1283 DEBUG(DEBUG_ERR,("Node %d has inconsistent public ip allocation and needs update.\n", ctdb->nodes[j]->pnn));
1284 rec->need_takeover_run = true;
1289 /* grab a new shiny list of public ips from the node */
1290 ret = ctdb_ctrl_get_public_ips_flags(ctdb,
1292 ctdb->nodes[j]->pnn,
1294 CTDB_PUBLIC_IP_FLAGS_ONLY_AVAILABLE,
1295 &ctdb->nodes[j]->available_public_ips);
1297 DEBUG(DEBUG_ERR,("Failed to read available public ips from node : %u\n",
1298 ctdb->nodes[j]->pnn));
1300 *culprit = ctdb->nodes[j]->pnn;
1309 /* when we start a recovery, make sure all nodes use the same reclock file
1312 static int sync_recovery_lock_file_across_cluster(struct ctdb_recoverd *rec)
1314 struct ctdb_context *ctdb = rec->ctdb;
1315 TALLOC_CTX *tmp_ctx = talloc_new(NULL);
1319 if (ctdb->recovery_lock_file == NULL) {
1323 data.dsize = strlen(ctdb->recovery_lock_file) + 1;
1324 data.dptr = (uint8_t *)ctdb->recovery_lock_file;
1327 nodes = list_of_active_nodes(ctdb, rec->nodemap, tmp_ctx, true);
1328 if (ctdb_client_async_control(ctdb, CTDB_CONTROL_SET_RECLOCK_FILE,
1334 DEBUG(DEBUG_ERR, (__location__ " Failed to sync reclock file settings\n"));
1335 talloc_free(tmp_ctx);
1339 talloc_free(tmp_ctx);
1345 we are the recmaster, and recovery is needed - start a recovery run
1347 static int do_recovery(struct ctdb_recoverd *rec,
1348 TALLOC_CTX *mem_ctx, uint32_t pnn,
1349 struct ctdb_node_map *nodemap, struct ctdb_vnn_map *vnnmap)
1351 struct ctdb_context *ctdb = rec->ctdb;
1353 uint32_t generation;
1354 struct ctdb_dbid_map *dbmap;
1357 struct timeval start_time;
1358 uint32_t culprit = (uint32_t)-1;
1360 DEBUG(DEBUG_NOTICE, (__location__ " Starting do_recovery\n"));
1362 /* if recovery fails, force it again */
1363 rec->need_recovery = true;
1365 for (i=0; i<ctdb->num_nodes; i++) {
1366 struct ctdb_banning_state *ban_state;
1368 if (ctdb->nodes[i]->ban_state == NULL) {
1371 ban_state = (struct ctdb_banning_state *)ctdb->nodes[i]->ban_state;
1372 if (ban_state->count < 2*ctdb->num_nodes) {
1375 DEBUG(DEBUG_NOTICE,("Node %u has caused %u recoveries recently - banning it for %u seconds\n",
1376 ctdb->nodes[i]->pnn, ban_state->count,
1377 ctdb->tunable.recovery_ban_period));
1378 ctdb_ban_node(rec, ctdb->nodes[i]->pnn, ctdb->tunable.recovery_ban_period);
1379 ban_state->count = 0;
1383 if (ctdb->tunable.verify_recovery_lock != 0) {
1384 DEBUG(DEBUG_ERR,("Taking out recovery lock from recovery daemon\n"));
1385 start_time = timeval_current();
1386 if (!ctdb_recovery_lock(ctdb, true)) {
1387 DEBUG(DEBUG_ERR,("Unable to get recovery lock - aborting recovery "
1388 "and ban ourself for %u seconds\n",
1389 ctdb->tunable.recovery_ban_period));
1390 ctdb_ban_node(rec, pnn, ctdb->tunable.recovery_ban_period);
1393 ctdb_ctrl_report_recd_lock_latency(ctdb, CONTROL_TIMEOUT(), timeval_elapsed(&start_time));
1394 DEBUG(DEBUG_NOTICE,("Recovery lock taken successfully by recovery daemon\n"));
1397 DEBUG(DEBUG_NOTICE, (__location__ " Recovery initiated due to problem with node %u\n", rec->last_culprit_node));
1399 /* get a list of all databases */
1400 ret = ctdb_ctrl_getdbmap(ctdb, CONTROL_TIMEOUT(), pnn, mem_ctx, &dbmap);
1402 DEBUG(DEBUG_ERR, (__location__ " Unable to get dbids from node :%u\n", pnn));
1406 /* we do the db creation before we set the recovery mode, so the freeze happens
1407 on all databases we will be dealing with. */
1409 /* verify that we have all the databases any other node has */
1410 ret = create_missing_local_databases(ctdb, nodemap, pnn, &dbmap, mem_ctx);
1412 DEBUG(DEBUG_ERR, (__location__ " Unable to create missing local databases\n"));
1416 /* verify that all other nodes have all our databases */
1417 ret = create_missing_remote_databases(ctdb, nodemap, pnn, dbmap, mem_ctx);
1419 DEBUG(DEBUG_ERR, (__location__ " Unable to create missing remote databases\n"));
1422 DEBUG(DEBUG_NOTICE, (__location__ " Recovery - created remote databases\n"));
1424 /* update the database priority for all remote databases */
1425 ret = update_db_priority_on_remote_nodes(ctdb, nodemap, pnn, dbmap, mem_ctx);
1427 DEBUG(DEBUG_ERR, (__location__ " Unable to set db priority on remote nodes\n"));
1429 DEBUG(DEBUG_NOTICE, (__location__ " Recovery - updated db priority for all databases\n"));
1432 /* update all other nodes to use the same setting for reclock files
1433 as the local recovery master.
1435 sync_recovery_lock_file_across_cluster(rec);
1437 /* set recovery mode to active on all nodes */
1438 ret = set_recovery_mode(ctdb, rec, nodemap, CTDB_RECOVERY_ACTIVE);
1440 DEBUG(DEBUG_ERR, (__location__ " Unable to set recovery mode to active on cluster\n"));
1444 /* execute the "startrecovery" event script on all nodes */
1445 ret = run_startrecovery_eventscript(rec, nodemap);
1447 DEBUG(DEBUG_ERR, (__location__ " Unable to run the 'startrecovery' event on cluster\n"));
1452 update all nodes to have the same flags that we have
1454 for (i=0;i<nodemap->num;i++) {
1455 if (nodemap->nodes[i].flags & NODE_FLAGS_DISCONNECTED) {
1459 ret = update_flags_on_all_nodes(ctdb, nodemap, i, nodemap->nodes[i].flags);
1461 DEBUG(DEBUG_ERR, (__location__ " Unable to update flags on all nodes for node %d\n", i));
1466 DEBUG(DEBUG_NOTICE, (__location__ " Recovery - updated flags\n"));
1468 /* pick a new generation number */
1469 generation = new_generation();
1471 /* change the vnnmap on this node to use the new generation
1472 number but not on any other nodes.
1473 this guarantees that if we abort the recovery prematurely
1474 for some reason (a node stops responding?)
1475 that we can just return immediately and we will reenter
1476 recovery shortly again.
1477 I.e. we deliberately leave the cluster with an inconsistent
1478 generation id to allow us to abort recovery at any stage and
1479 just restart it from scratch.
1481 vnnmap->generation = generation;
1482 ret = ctdb_ctrl_setvnnmap(ctdb, CONTROL_TIMEOUT(), pnn, mem_ctx, vnnmap);
1484 DEBUG(DEBUG_ERR, (__location__ " Unable to set vnnmap for node %u\n", pnn));
1488 data.dptr = (void *)&generation;
1489 data.dsize = sizeof(uint32_t);
1491 nodes = list_of_active_nodes(ctdb, nodemap, mem_ctx, true);
1492 if (ctdb_client_async_control(ctdb, CTDB_CONTROL_TRANSACTION_START,
1494 CONTROL_TIMEOUT(), false, data,
1496 transaction_start_fail_callback,
1498 DEBUG(DEBUG_ERR, (__location__ " Unable to start transactions. Recovery failed.\n"));
1499 if (ctdb_client_async_control(ctdb, CTDB_CONTROL_TRANSACTION_CANCEL,
1501 CONTROL_TIMEOUT(), false, tdb_null,
1505 DEBUG(DEBUG_ERR,("Failed to cancel recovery transaction\n"));
1510 DEBUG(DEBUG_NOTICE,(__location__ " started transactions on all nodes\n"));
1512 for (i=0;i<dbmap->num;i++) {
1513 ret = recover_database(rec, mem_ctx,
1515 dbmap->dbs[i].persistent,
1516 pnn, nodemap, generation);
1518 DEBUG(DEBUG_ERR, (__location__ " Failed to recover database 0x%x\n", dbmap->dbs[i].dbid));
1523 DEBUG(DEBUG_NOTICE, (__location__ " Recovery - starting database commits\n"));
1525 /* commit all the changes */
1526 if (ctdb_client_async_control(ctdb, CTDB_CONTROL_TRANSACTION_COMMIT,
1528 CONTROL_TIMEOUT(), false, data,
1531 DEBUG(DEBUG_ERR, (__location__ " Unable to commit recovery changes. Recovery failed.\n"));
1535 DEBUG(DEBUG_NOTICE, (__location__ " Recovery - committed databases\n"));
1538 /* update the capabilities for all nodes */
1539 ret = update_capabilities(ctdb, nodemap);
1541 DEBUG(DEBUG_ERR, (__location__ " Unable to update node capabilities.\n"));
1545 /* build a new vnn map with all the currently active and
1547 generation = new_generation();
1548 vnnmap = talloc(mem_ctx, struct ctdb_vnn_map);
1549 CTDB_NO_MEMORY(ctdb, vnnmap);
1550 vnnmap->generation = generation;
1552 vnnmap->map = talloc_zero_array(vnnmap, uint32_t, vnnmap->size);
1553 CTDB_NO_MEMORY(ctdb, vnnmap->map);
1554 for (i=j=0;i<nodemap->num;i++) {
1555 if (nodemap->nodes[i].flags & NODE_FLAGS_INACTIVE) {
1558 if (!(ctdb->nodes[i]->capabilities & CTDB_CAP_LMASTER)) {
1559 /* this node can not be an lmaster */
1560 DEBUG(DEBUG_DEBUG, ("Node %d cant be a LMASTER, skipping it\n", i));
1565 vnnmap->map = talloc_realloc(vnnmap, vnnmap->map, uint32_t, vnnmap->size);
1566 CTDB_NO_MEMORY(ctdb, vnnmap->map);
1567 vnnmap->map[j++] = nodemap->nodes[i].pnn;
1570 if (vnnmap->size == 0) {
1571 DEBUG(DEBUG_NOTICE, ("No suitable lmasters found. Adding local node (recmaster) anyway.\n"));
1573 vnnmap->map = talloc_realloc(vnnmap, vnnmap->map, uint32_t, vnnmap->size);
1574 CTDB_NO_MEMORY(ctdb, vnnmap->map);
1575 vnnmap->map[0] = pnn;
1578 /* update to the new vnnmap on all nodes */
1579 ret = update_vnnmap_on_all_nodes(ctdb, nodemap, pnn, vnnmap, mem_ctx);
1581 DEBUG(DEBUG_ERR, (__location__ " Unable to update vnnmap on all nodes\n"));
1585 DEBUG(DEBUG_NOTICE, (__location__ " Recovery - updated vnnmap\n"));
1587 /* update recmaster to point to us for all nodes */
1588 ret = set_recovery_master(ctdb, nodemap, pnn);
1590 DEBUG(DEBUG_ERR, (__location__ " Unable to set recovery master\n"));
1594 DEBUG(DEBUG_NOTICE, (__location__ " Recovery - updated recmaster\n"));
1597 update all nodes to have the same flags that we have
1599 for (i=0;i<nodemap->num;i++) {
1600 if (nodemap->nodes[i].flags & NODE_FLAGS_DISCONNECTED) {
1604 ret = update_flags_on_all_nodes(ctdb, nodemap, i, nodemap->nodes[i].flags);
1606 DEBUG(DEBUG_ERR, (__location__ " Unable to update flags on all nodes for node %d\n", i));
1611 DEBUG(DEBUG_NOTICE, (__location__ " Recovery - updated flags\n"));
1613 /* disable recovery mode */
1614 ret = set_recovery_mode(ctdb, rec, nodemap, CTDB_RECOVERY_NORMAL);
1616 DEBUG(DEBUG_ERR, (__location__ " Unable to set recovery mode to normal on cluster\n"));
1620 DEBUG(DEBUG_NOTICE, (__location__ " Recovery - disabled recovery mode\n"));
1623 tell nodes to takeover their public IPs
1625 ret = ctdb_reload_remote_public_ips(ctdb, rec, nodemap, &culprit);
1627 DEBUG(DEBUG_ERR,("Failed to read public ips from remote node %d\n",
1631 rec->need_takeover_run = false;
1632 ret = ctdb_takeover_run(ctdb, nodemap);
1634 DEBUG(DEBUG_ERR, (__location__ " Unable to setup public takeover addresses\n"));
1637 DEBUG(DEBUG_NOTICE, (__location__ " Recovery - takeip finished\n"));
1639 /* execute the "recovered" event script on all nodes */
1640 ret = run_recovered_eventscript(ctdb, nodemap, "do_recovery");
1642 DEBUG(DEBUG_ERR, (__location__ " Unable to run the 'recovered' event on cluster. Recovery process failed.\n"));
1646 DEBUG(DEBUG_NOTICE, (__location__ " Recovery - finished the recovered event\n"));
1648 /* send a message to all clients telling them that the cluster
1649 has been reconfigured */
1650 ctdb_client_send_message(ctdb, CTDB_BROADCAST_CONNECTED, CTDB_SRVID_RECONFIGURE, tdb_null);
1652 DEBUG(DEBUG_NOTICE, (__location__ " Recovery complete\n"));
1654 rec->need_recovery = false;
1656 /* we managed to complete a full recovery, make sure to forgive
1657 any past sins by the nodes that could now participate in the
1660 DEBUG(DEBUG_ERR,("Resetting ban count to 0 for all nodes\n"));
1661 for (i=0;i<nodemap->num;i++) {
1662 struct ctdb_banning_state *ban_state;
1664 if (nodemap->nodes[i].flags & NODE_FLAGS_DISCONNECTED) {
1668 ban_state = (struct ctdb_banning_state *)ctdb->nodes[nodemap->nodes[i].pnn]->ban_state;
1669 if (ban_state == NULL) {
1673 ban_state->count = 0;
1677 /* We just finished a recovery successfully.
1678 We now wait for rerecovery_timeout before we allow
1679 another recovery to take place.
1681 DEBUG(DEBUG_NOTICE, ("Just finished a recovery. New recoveries will now be supressed for the rerecovery timeout (%d seconds)\n", ctdb->tunable.rerecovery_timeout));
1682 ctdb_wait_timeout(ctdb, ctdb->tunable.rerecovery_timeout);
1683 DEBUG(DEBUG_NOTICE, ("The rerecovery timeout has elapsed. We now allow recoveries to trigger again.\n"));
1690 elections are won by first checking the number of connected nodes, then
1691 the priority time, then the pnn
1693 struct election_message {
1694 uint32_t num_connected;
1695 struct timeval priority_time;
1697 uint32_t node_flags;
1701 form this nodes election data
1703 static void ctdb_election_data(struct ctdb_recoverd *rec, struct election_message *em)
1706 struct ctdb_node_map *nodemap;
1707 struct ctdb_context *ctdb = rec->ctdb;
1711 em->pnn = rec->ctdb->pnn;
1712 em->priority_time = rec->priority_time;
1714 ret = ctdb_ctrl_getnodemap(ctdb, CONTROL_TIMEOUT(), CTDB_CURRENT_NODE, rec, &nodemap);
1716 DEBUG(DEBUG_ERR,(__location__ " unable to get election data\n"));
1720 rec->node_flags = nodemap->nodes[ctdb->pnn].flags;
1721 em->node_flags = rec->node_flags;
1723 for (i=0;i<nodemap->num;i++) {
1724 if (!(nodemap->nodes[i].flags & NODE_FLAGS_DISCONNECTED)) {
1725 em->num_connected++;
1729 /* we shouldnt try to win this election if we cant be a recmaster */
1730 if ((ctdb->capabilities & CTDB_CAP_RECMASTER) == 0) {
1731 em->num_connected = 0;
1732 em->priority_time = timeval_current();
1735 talloc_free(nodemap);
1739 see if the given election data wins
1741 static bool ctdb_election_win(struct ctdb_recoverd *rec, struct election_message *em)
1743 struct election_message myem;
1746 ctdb_election_data(rec, &myem);
1748 /* we cant win if we dont have the recmaster capability */
1749 if ((rec->ctdb->capabilities & CTDB_CAP_RECMASTER) == 0) {
1753 /* we cant win if we are banned */
1754 if (rec->node_flags & NODE_FLAGS_BANNED) {
1758 /* we cant win if we are stopped */
1759 if (rec->node_flags & NODE_FLAGS_STOPPED) {
1763 /* we will automatically win if the other node is banned */
1764 if (em->node_flags & NODE_FLAGS_BANNED) {
1768 /* we will automatically win if the other node is banned */
1769 if (em->node_flags & NODE_FLAGS_STOPPED) {
1773 /* try to use the most connected node */
1775 cmp = (int)myem.num_connected - (int)em->num_connected;
1778 /* then the longest running node */
1780 cmp = timeval_compare(&em->priority_time, &myem.priority_time);
1784 cmp = (int)myem.pnn - (int)em->pnn;
1791 send out an election request
1793 static int send_election_request(struct ctdb_recoverd *rec, uint32_t pnn, bool update_recmaster)
1796 TDB_DATA election_data;
1797 struct election_message emsg;
1799 struct ctdb_context *ctdb = rec->ctdb;
1801 srvid = CTDB_SRVID_RECOVERY;
1803 ctdb_election_data(rec, &emsg);
1805 election_data.dsize = sizeof(struct election_message);
1806 election_data.dptr = (unsigned char *)&emsg;
1809 /* send an election message to all active nodes */
1810 DEBUG(DEBUG_INFO,(__location__ " Send election request to all active nodes\n"));
1811 ctdb_client_send_message(ctdb, CTDB_BROADCAST_ALL, srvid, election_data);
1814 /* A new node that is already frozen has entered the cluster.
1815 The existing nodes are not frozen and dont need to be frozen
1816 until the election has ended and we start the actual recovery
1818 if (update_recmaster == true) {
1819 /* first we assume we will win the election and set
1820 recoverymaster to be ourself on the current node
1822 ret = ctdb_ctrl_setrecmaster(ctdb, CONTROL_TIMEOUT(), pnn, pnn);
1824 DEBUG(DEBUG_ERR, (__location__ " failed to send recmaster election request\n"));
1834 this function will unban all nodes in the cluster
1836 static void unban_all_nodes(struct ctdb_context *ctdb)
1839 struct ctdb_node_map *nodemap;
1840 TALLOC_CTX *tmp_ctx = talloc_new(ctdb);
1842 ret = ctdb_ctrl_getnodemap(ctdb, CONTROL_TIMEOUT(), CTDB_CURRENT_NODE, tmp_ctx, &nodemap);
1844 DEBUG(DEBUG_ERR,(__location__ " failed to get nodemap to unban all nodes\n"));
1848 for (i=0;i<nodemap->num;i++) {
1849 if ( (!(nodemap->nodes[i].flags & NODE_FLAGS_DISCONNECTED))
1850 && (nodemap->nodes[i].flags & NODE_FLAGS_BANNED) ) {
1851 ctdb_ctrl_modflags(ctdb, CONTROL_TIMEOUT(), nodemap->nodes[i].pnn, 0, NODE_FLAGS_BANNED);
1855 talloc_free(tmp_ctx);
1860 we think we are winning the election - send a broadcast election request
1862 static void election_send_request(struct event_context *ev, struct timed_event *te, struct timeval t, void *p)
1864 struct ctdb_recoverd *rec = talloc_get_type(p, struct ctdb_recoverd);
1867 ret = send_election_request(rec, ctdb_get_pnn(rec->ctdb), false);
1869 DEBUG(DEBUG_ERR,("Failed to send election request!\n"));
1872 talloc_free(rec->send_election_te);
1873 rec->send_election_te = NULL;
1877 handler for memory dumps
1879 static void mem_dump_handler(struct ctdb_context *ctdb, uint64_t srvid,
1880 TDB_DATA data, void *private_data)
1882 TALLOC_CTX *tmp_ctx = talloc_new(ctdb);
1885 struct rd_memdump_reply *rd;
1887 if (data.dsize != sizeof(struct rd_memdump_reply)) {
1888 DEBUG(DEBUG_ERR, (__location__ " Wrong size of return address.\n"));
1889 talloc_free(tmp_ctx);
1892 rd = (struct rd_memdump_reply *)data.dptr;
1894 dump = talloc_zero(tmp_ctx, TDB_DATA);
1896 DEBUG(DEBUG_ERR, (__location__ " Failed to allocate memory for memdump\n"));
1897 talloc_free(tmp_ctx);
1900 ret = ctdb_dump_memory(ctdb, dump);
1902 DEBUG(DEBUG_ERR, (__location__ " ctdb_dump_memory() failed\n"));
1903 talloc_free(tmp_ctx);
1907 DEBUG(DEBUG_ERR, ("recovery master memory dump\n"));
1909 ret = ctdb_client_send_message(ctdb, rd->pnn, rd->srvid, *dump);
1911 DEBUG(DEBUG_ERR,("Failed to send rd memdump reply message\n"));
1912 talloc_free(tmp_ctx);
1916 talloc_free(tmp_ctx);
1920 handler for reload_nodes
1922 static void reload_nodes_handler(struct ctdb_context *ctdb, uint64_t srvid,
1923 TDB_DATA data, void *private_data)
1925 struct ctdb_recoverd *rec = talloc_get_type(private_data, struct ctdb_recoverd);
1927 DEBUG(DEBUG_ERR, (__location__ " Reload nodes file from recovery daemon\n"));
1929 reload_nodes_file(rec->ctdb);
1933 static void reenable_ip_check(struct event_context *ev, struct timed_event *te,
1934 struct timeval yt, void *p)
1936 struct ctdb_recoverd *rec = talloc_get_type(p, struct ctdb_recoverd);
1938 talloc_free(rec->ip_check_disable_ctx);
1939 rec->ip_check_disable_ctx = NULL;
1943 static void recd_update_ip_handler(struct ctdb_context *ctdb, uint64_t srvid,
1944 TDB_DATA data, void *private_data)
1946 struct ctdb_recoverd *rec = talloc_get_type(private_data, struct ctdb_recoverd);
1947 struct ctdb_public_ip *ip;
1949 if (rec->recmaster != rec->ctdb->pnn) {
1950 DEBUG(DEBUG_INFO,("Not recmaster, ignore update ip message\n"));
1954 if (data.dsize != sizeof(struct ctdb_public_ip)) {
1955 DEBUG(DEBUG_ERR,(__location__ " Incorrect size of recd update ip message. Was %zd but expected %zd bytes\n", data.dsize, sizeof(struct ctdb_public_ip)));
1959 ip = (struct ctdb_public_ip *)data.dptr;
1961 update_ip_assignment_tree(rec->ctdb, ip);
1965 static void disable_ip_check_handler(struct ctdb_context *ctdb, uint64_t srvid,
1966 TDB_DATA data, void *private_data)
1968 struct ctdb_recoverd *rec = talloc_get_type(private_data, struct ctdb_recoverd);
1971 if (rec->ip_check_disable_ctx != NULL) {
1972 talloc_free(rec->ip_check_disable_ctx);
1973 rec->ip_check_disable_ctx = NULL;
1976 if (data.dsize != sizeof(uint32_t)) {
1977 DEBUG(DEBUG_ERR,(__location__ " Wrong size for data :%lu "
1978 "expexting %lu\n", (long unsigned)data.dsize,
1979 (long unsigned)sizeof(uint32_t)));
1982 if (data.dptr == NULL) {
1983 DEBUG(DEBUG_ERR,(__location__ " No data recaived\n"));
1987 timeout = *((uint32_t *)data.dptr);
1988 DEBUG(DEBUG_NOTICE,("Disabling ip check for %u seconds\n", timeout));
1990 rec->ip_check_disable_ctx = talloc_new(rec);
1991 CTDB_NO_MEMORY_VOID(ctdb, rec->ip_check_disable_ctx);
1993 event_add_timed(ctdb->ev, rec->ip_check_disable_ctx, timeval_current_ofs(timeout, 0), reenable_ip_check, rec);
1998 handler for ip reallocate, just add it to the list of callers and
1999 handle this later in the monitor_cluster loop so we do not recurse
2000 with other callers to takeover_run()
2002 static void ip_reallocate_handler(struct ctdb_context *ctdb, uint64_t srvid,
2003 TDB_DATA data, void *private_data)
2005 struct ctdb_recoverd *rec = talloc_get_type(private_data, struct ctdb_recoverd);
2006 struct ip_reallocate_list *caller;
2008 if (data.dsize != sizeof(struct rd_memdump_reply)) {
2009 DEBUG(DEBUG_ERR, (__location__ " Wrong size of return address.\n"));
2013 if (rec->ip_reallocate_ctx == NULL) {
2014 rec->ip_reallocate_ctx = talloc_new(rec);
2015 CTDB_NO_MEMORY_FATAL(ctdb, rec->ip_reallocate_ctx);
2018 caller = talloc(rec->ip_reallocate_ctx, struct ip_reallocate_list);
2019 CTDB_NO_MEMORY_FATAL(ctdb, caller);
2021 caller->rd = (struct rd_memdump_reply *)talloc_steal(caller, data.dptr);
2022 caller->next = rec->reallocate_callers;
2023 rec->reallocate_callers = caller;
2028 static void process_ipreallocate_requests(struct ctdb_context *ctdb, struct ctdb_recoverd *rec)
2030 TALLOC_CTX *tmp_ctx = talloc_new(ctdb);
2033 struct ip_reallocate_list *callers;
2036 DEBUG(DEBUG_INFO, ("recovery master forced ip reallocation\n"));
2038 /* update the list of public ips that a node can handle for
2041 ret = ctdb_reload_remote_public_ips(ctdb, rec, rec->nodemap, &culprit);
2043 DEBUG(DEBUG_ERR,("Failed to read public ips from remote node %d\n",
2045 rec->need_takeover_run = true;
2048 ret = ctdb_takeover_run(ctdb, rec->nodemap);
2050 DEBUG(DEBUG_ERR,("Failed to read public ips from remote node %d\n",
2052 rec->need_takeover_run = true;
2056 result.dsize = sizeof(int32_t);
2057 result.dptr = (uint8_t *)&ret;
2059 for (callers=rec->reallocate_callers; callers; callers=callers->next) {
2061 /* Someone that sent srvid==0 does not want a reply */
2062 if (callers->rd->srvid == 0) {
2065 DEBUG(DEBUG_INFO,("Sending ip reallocate reply message to "
2066 "%u:%llu\n", (unsigned)callers->rd->pnn,
2067 (unsigned long long)callers->rd->srvid));
2068 ret = ctdb_client_send_message(ctdb, callers->rd->pnn, callers->rd->srvid, result);
2070 DEBUG(DEBUG_ERR,("Failed to send ip reallocate reply "
2071 "message to %u:%llu\n",
2072 (unsigned)callers->rd->pnn,
2073 (unsigned long long)callers->rd->srvid));
2077 talloc_free(tmp_ctx);
2078 talloc_free(rec->ip_reallocate_ctx);
2079 rec->ip_reallocate_ctx = NULL;
2080 rec->reallocate_callers = NULL;
2086 handler for recovery master elections
2088 static void election_handler(struct ctdb_context *ctdb, uint64_t srvid,
2089 TDB_DATA data, void *private_data)
2091 struct ctdb_recoverd *rec = talloc_get_type(private_data, struct ctdb_recoverd);
2093 struct election_message *em = (struct election_message *)data.dptr;
2094 TALLOC_CTX *mem_ctx;
2096 /* we got an election packet - update the timeout for the election */
2097 talloc_free(rec->election_timeout);
2098 rec->election_timeout = event_add_timed(ctdb->ev, ctdb,
2100 timeval_current_ofs(0, 500000) :
2101 timeval_current_ofs(ctdb->tunable.election_timeout, 0),
2102 ctdb_election_timeout, rec);
2104 mem_ctx = talloc_new(ctdb);
2106 /* someone called an election. check their election data
2107 and if we disagree and we would rather be the elected node,
2108 send a new election message to all other nodes
2110 if (ctdb_election_win(rec, em)) {
2111 if (!rec->send_election_te) {
2112 rec->send_election_te = event_add_timed(ctdb->ev, rec,
2113 timeval_current_ofs(0, 500000),
2114 election_send_request, rec);
2116 talloc_free(mem_ctx);
2117 /*unban_all_nodes(ctdb);*/
2122 talloc_free(rec->send_election_te);
2123 rec->send_election_te = NULL;
2125 if (ctdb->tunable.verify_recovery_lock != 0) {
2126 /* release the recmaster lock */
2127 if (em->pnn != ctdb->pnn &&
2128 ctdb->recovery_lock_fd != -1) {
2129 close(ctdb->recovery_lock_fd);
2130 ctdb->recovery_lock_fd = -1;
2131 unban_all_nodes(ctdb);
2135 /* ok, let that guy become recmaster then */
2136 ret = ctdb_ctrl_setrecmaster(ctdb, CONTROL_TIMEOUT(), ctdb_get_pnn(ctdb), em->pnn);
2138 DEBUG(DEBUG_ERR, (__location__ " failed to send recmaster election request"));
2139 talloc_free(mem_ctx);
2143 talloc_free(mem_ctx);
2149 force the start of the election process
2151 static void force_election(struct ctdb_recoverd *rec, uint32_t pnn,
2152 struct ctdb_node_map *nodemap)
2155 struct ctdb_context *ctdb = rec->ctdb;
2157 DEBUG(DEBUG_INFO,(__location__ " Force an election\n"));
2159 /* set all nodes to recovery mode to stop all internode traffic */
2160 ret = set_recovery_mode(ctdb, rec, nodemap, CTDB_RECOVERY_ACTIVE);
2162 DEBUG(DEBUG_ERR, (__location__ " Unable to set recovery mode to active on cluster\n"));
2166 talloc_free(rec->election_timeout);
2167 rec->election_timeout = event_add_timed(ctdb->ev, ctdb,
2169 timeval_current_ofs(0, 500000) :
2170 timeval_current_ofs(ctdb->tunable.election_timeout, 0),
2171 ctdb_election_timeout, rec);
2173 ret = send_election_request(rec, pnn, true);
2175 DEBUG(DEBUG_ERR, (__location__ " failed to initiate recmaster election"));
2179 /* wait for a few seconds to collect all responses */
2180 ctdb_wait_election(rec);
2186 handler for when a node changes its flags
2188 static void monitor_handler(struct ctdb_context *ctdb, uint64_t srvid,
2189 TDB_DATA data, void *private_data)
2192 struct ctdb_node_flag_change *c = (struct ctdb_node_flag_change *)data.dptr;
2193 struct ctdb_node_map *nodemap=NULL;
2194 TALLOC_CTX *tmp_ctx;
2195 uint32_t changed_flags;
2197 struct ctdb_recoverd *rec = talloc_get_type(private_data, struct ctdb_recoverd);
2198 int disabled_flag_changed;
2200 if (data.dsize != sizeof(*c)) {
2201 DEBUG(DEBUG_ERR,(__location__ "Invalid data in ctdb_node_flag_change\n"));
2205 tmp_ctx = talloc_new(ctdb);
2206 CTDB_NO_MEMORY_VOID(ctdb, tmp_ctx);
2208 ret = ctdb_ctrl_getnodemap(ctdb, CONTROL_TIMEOUT(), CTDB_CURRENT_NODE, tmp_ctx, &nodemap);
2210 DEBUG(DEBUG_ERR,(__location__ "ctdb_ctrl_getnodemap failed in monitor_handler\n"));
2211 talloc_free(tmp_ctx);
2216 for (i=0;i<nodemap->num;i++) {
2217 if (nodemap->nodes[i].pnn == c->pnn) break;
2220 if (i == nodemap->num) {
2221 DEBUG(DEBUG_CRIT,(__location__ "Flag change for non-existant node %u\n", c->pnn));
2222 talloc_free(tmp_ctx);
2226 changed_flags = c->old_flags ^ c->new_flags;
2228 if (nodemap->nodes[i].flags != c->new_flags) {
2229 DEBUG(DEBUG_NOTICE,("Node %u has changed flags - now 0x%x was 0x%x\n", c->pnn, c->new_flags, c->old_flags));
2232 disabled_flag_changed = (nodemap->nodes[i].flags ^ c->new_flags) & NODE_FLAGS_DISABLED;
2234 nodemap->nodes[i].flags = c->new_flags;
2236 ret = ctdb_ctrl_getrecmaster(ctdb, tmp_ctx, CONTROL_TIMEOUT(),
2237 CTDB_CURRENT_NODE, &ctdb->recovery_master);
2240 ret = ctdb_ctrl_getrecmode(ctdb, tmp_ctx, CONTROL_TIMEOUT(),
2241 CTDB_CURRENT_NODE, &ctdb->recovery_mode);
2245 ctdb->recovery_master == ctdb->pnn &&
2246 ctdb->recovery_mode == CTDB_RECOVERY_NORMAL) {
2247 /* Only do the takeover run if the perm disabled or unhealthy
2248 flags changed since these will cause an ip failover but not
2250 If the node became disconnected or banned this will also
2251 lead to an ip address failover but that is handled
2254 if (disabled_flag_changed) {
2255 rec->need_takeover_run = true;
2259 talloc_free(tmp_ctx);
2263 handler for when we need to push out flag changes ot all other nodes
2265 static void push_flags_handler(struct ctdb_context *ctdb, uint64_t srvid,
2266 TDB_DATA data, void *private_data)
2269 struct ctdb_node_flag_change *c = (struct ctdb_node_flag_change *)data.dptr;
2270 struct ctdb_node_map *nodemap=NULL;
2271 TALLOC_CTX *tmp_ctx = talloc_new(ctdb);
2275 /* find the recovery master */
2276 ret = ctdb_ctrl_getrecmaster(ctdb, tmp_ctx, CONTROL_TIMEOUT(), CTDB_CURRENT_NODE, &recmaster);
2278 DEBUG(DEBUG_ERR, (__location__ " Unable to get recmaster from local node\n"));
2279 talloc_free(tmp_ctx);
2283 /* read the node flags from the recmaster */
2284 ret = ctdb_ctrl_getnodemap(ctdb, CONTROL_TIMEOUT(), recmaster, tmp_ctx, &nodemap);
2286 DEBUG(DEBUG_ERR, (__location__ " Unable to get nodemap from node %u\n", c->pnn));
2287 talloc_free(tmp_ctx);
2290 if (c->pnn >= nodemap->num) {
2291 DEBUG(DEBUG_ERR,(__location__ " Nodemap from recmaster does not contain node %d\n", c->pnn));
2292 talloc_free(tmp_ctx);
2296 /* send the flags update to all connected nodes */
2297 nodes = list_of_connected_nodes(ctdb, nodemap, tmp_ctx, true);
2299 if (ctdb_client_async_control(ctdb, CTDB_CONTROL_MODIFY_FLAGS,
2300 nodes, 0, CONTROL_TIMEOUT(),
2304 DEBUG(DEBUG_ERR, (__location__ " ctdb_control to modify node flags failed\n"));
2306 talloc_free(tmp_ctx);
2310 talloc_free(tmp_ctx);
2314 struct verify_recmode_normal_data {
2316 enum monitor_result status;
2319 static void verify_recmode_normal_callback(struct ctdb_client_control_state *state)
2321 struct verify_recmode_normal_data *rmdata = talloc_get_type(state->async.private_data, struct verify_recmode_normal_data);
2324 /* one more node has responded with recmode data*/
2327 /* if we failed to get the recmode, then return an error and let
2328 the main loop try again.
2330 if (state->state != CTDB_CONTROL_DONE) {
2331 if (rmdata->status == MONITOR_OK) {
2332 rmdata->status = MONITOR_FAILED;
2337 /* if we got a response, then the recmode will be stored in the
2340 if (state->status != CTDB_RECOVERY_NORMAL) {
2341 DEBUG(DEBUG_NOTICE, (__location__ " Node:%u was in recovery mode. Restart recovery process\n", state->c->hdr.destnode));
2342 rmdata->status = MONITOR_RECOVERY_NEEDED;
2349 /* verify that all nodes are in normal recovery mode */
2350 static enum monitor_result verify_recmode(struct ctdb_context *ctdb, struct ctdb_node_map *nodemap)
2352 struct verify_recmode_normal_data *rmdata;
2353 TALLOC_CTX *mem_ctx = talloc_new(ctdb);
2354 struct ctdb_client_control_state *state;
2355 enum monitor_result status;
2358 rmdata = talloc(mem_ctx, struct verify_recmode_normal_data);
2359 CTDB_NO_MEMORY_FATAL(ctdb, rmdata);
2361 rmdata->status = MONITOR_OK;
2363 /* loop over all active nodes and send an async getrecmode call to
2365 for (j=0; j<nodemap->num; j++) {
2366 if (nodemap->nodes[j].flags & NODE_FLAGS_INACTIVE) {
2369 state = ctdb_ctrl_getrecmode_send(ctdb, mem_ctx,
2371 nodemap->nodes[j].pnn);
2372 if (state == NULL) {
2373 /* we failed to send the control, treat this as
2374 an error and try again next iteration
2376 DEBUG(DEBUG_ERR,("Failed to call ctdb_ctrl_getrecmode_send during monitoring\n"));
2377 talloc_free(mem_ctx);
2378 return MONITOR_FAILED;
2381 /* set up the callback functions */
2382 state->async.fn = verify_recmode_normal_callback;
2383 state->async.private_data = rmdata;
2385 /* one more control to wait for to complete */
2390 /* now wait for up to the maximum number of seconds allowed
2391 or until all nodes we expect a response from has replied
2393 while (rmdata->count > 0) {
2394 event_loop_once(ctdb->ev);
2397 status = rmdata->status;
2398 talloc_free(mem_ctx);
2403 struct verify_recmaster_data {
2404 struct ctdb_recoverd *rec;
2407 enum monitor_result status;
2410 static void verify_recmaster_callback(struct ctdb_client_control_state *state)
2412 struct verify_recmaster_data *rmdata = talloc_get_type(state->async.private_data, struct verify_recmaster_data);
2415 /* one more node has responded with recmaster data*/
2418 /* if we failed to get the recmaster, then return an error and let
2419 the main loop try again.
2421 if (state->state != CTDB_CONTROL_DONE) {
2422 if (rmdata->status == MONITOR_OK) {
2423 rmdata->status = MONITOR_FAILED;
2428 /* if we got a response, then the recmaster will be stored in the
2431 if (state->status != rmdata->pnn) {
2432 DEBUG(DEBUG_ERR,("Node %d does not agree we are the recmaster. Need a new recmaster election\n", state->c->hdr.destnode));
2433 ctdb_set_culprit(rmdata->rec, state->c->hdr.destnode);
2434 rmdata->status = MONITOR_ELECTION_NEEDED;
2441 /* verify that all nodes agree that we are the recmaster */
2442 static enum monitor_result verify_recmaster(struct ctdb_recoverd *rec, struct ctdb_node_map *nodemap, uint32_t pnn)
2444 struct ctdb_context *ctdb = rec->ctdb;
2445 struct verify_recmaster_data *rmdata;
2446 TALLOC_CTX *mem_ctx = talloc_new(ctdb);
2447 struct ctdb_client_control_state *state;
2448 enum monitor_result status;
2451 rmdata = talloc(mem_ctx, struct verify_recmaster_data);
2452 CTDB_NO_MEMORY_FATAL(ctdb, rmdata);
2456 rmdata->status = MONITOR_OK;
2458 /* loop over all active nodes and send an async getrecmaster call to
2460 for (j=0; j<nodemap->num; j++) {
2461 if (nodemap->nodes[j].flags & NODE_FLAGS_INACTIVE) {
2464 state = ctdb_ctrl_getrecmaster_send(ctdb, mem_ctx,
2466 nodemap->nodes[j].pnn);
2467 if (state == NULL) {
2468 /* we failed to send the control, treat this as
2469 an error and try again next iteration
2471 DEBUG(DEBUG_ERR,("Failed to call ctdb_ctrl_getrecmaster_send during monitoring\n"));
2472 talloc_free(mem_ctx);
2473 return MONITOR_FAILED;
2476 /* set up the callback functions */
2477 state->async.fn = verify_recmaster_callback;
2478 state->async.private_data = rmdata;
2480 /* one more control to wait for to complete */
2485 /* now wait for up to the maximum number of seconds allowed
2486 or until all nodes we expect a response from has replied
2488 while (rmdata->count > 0) {
2489 event_loop_once(ctdb->ev);
2492 status = rmdata->status;
2493 talloc_free(mem_ctx);
2498 /* called to check that the local allocation of public ip addresses is ok.
2500 static int verify_local_ip_allocation(struct ctdb_context *ctdb, struct ctdb_recoverd *rec, uint32_t pnn)
2502 TALLOC_CTX *mem_ctx = talloc_new(NULL);
2503 struct ctdb_control_get_ifaces *ifaces = NULL;
2504 struct ctdb_all_public_ips *ips = NULL;
2505 struct ctdb_uptime *uptime1 = NULL;
2506 struct ctdb_uptime *uptime2 = NULL;
2508 bool need_iface_check = false;
2509 bool need_takeover_run = false;
2511 ret = ctdb_ctrl_uptime(ctdb, mem_ctx, CONTROL_TIMEOUT(),
2512 CTDB_CURRENT_NODE, &uptime1);
2514 DEBUG(DEBUG_ERR, ("Unable to get uptime from local node %u\n", pnn));
2515 talloc_free(mem_ctx);
2520 /* read the interfaces from the local node */
2521 ret = ctdb_ctrl_get_ifaces(ctdb, CONTROL_TIMEOUT(), CTDB_CURRENT_NODE, mem_ctx, &ifaces);
2523 DEBUG(DEBUG_ERR, ("Unable to get interfaces from local node %u\n", pnn));
2524 talloc_free(mem_ctx);
2529 need_iface_check = true;
2530 } else if (rec->ifaces->num != ifaces->num) {
2531 need_iface_check = true;
2532 } else if (memcmp(rec->ifaces, ifaces, talloc_get_size(ifaces)) != 0) {
2533 need_iface_check = true;
2536 if (need_iface_check) {
2537 DEBUG(DEBUG_NOTICE, ("The interfaces status has changed on "
2538 "local node %u - force takeover run\n",
2540 need_takeover_run = true;
2543 /* read the ip allocation from the local node */
2544 ret = ctdb_ctrl_get_public_ips(ctdb, CONTROL_TIMEOUT(), CTDB_CURRENT_NODE, mem_ctx, &ips);
2546 DEBUG(DEBUG_ERR, ("Unable to get public ips from local node %u\n", pnn));
2547 talloc_free(mem_ctx);
2551 ret = ctdb_ctrl_uptime(ctdb, mem_ctx, CONTROL_TIMEOUT(),
2552 CTDB_CURRENT_NODE, &uptime2);
2554 DEBUG(DEBUG_ERR, ("Unable to get uptime from local node %u\n", pnn));
2555 talloc_free(mem_ctx);
2559 /* skip the check if the startrecovery time has changed */
2560 if (timeval_compare(&uptime1->last_recovery_started,
2561 &uptime2->last_recovery_started) != 0) {
2562 DEBUG(DEBUG_NOTICE, (__location__ " last recovery time changed while we read the public ip list. skipping public ip address check\n"));
2563 talloc_free(mem_ctx);
2567 /* skip the check if the endrecovery time has changed */
2568 if (timeval_compare(&uptime1->last_recovery_finished,
2569 &uptime2->last_recovery_finished) != 0) {
2570 DEBUG(DEBUG_NOTICE, (__location__ " last recovery time changed while we read the public ip list. skipping public ip address check\n"));
2571 talloc_free(mem_ctx);
2575 /* skip the check if we have started but not finished recovery */
2576 if (timeval_compare(&uptime1->last_recovery_finished,
2577 &uptime1->last_recovery_started) != 1) {
2578 DEBUG(DEBUG_NOTICE, (__location__ " in the middle of recovery or ip reallocation. skipping public ip address check\n"));
2579 talloc_free(mem_ctx);
2584 talloc_free(rec->ifaces);
2585 rec->ifaces = talloc_steal(rec, ifaces);
2587 /* verify that we have the ip addresses we should have
2588 and we dont have ones we shouldnt have.
2589 if we find an inconsistency we set recmode to
2590 active on the local node and wait for the recmaster
2591 to do a full blown recovery
2593 if (ctdb->tunable.disable_ip_failover == 0) {
2594 for (j=0; j<ips->num; j++) {
2595 if (ips->ips[j].pnn == pnn) {
2596 if (!ctdb_sys_have_ip(&ips->ips[j].addr)) {
2597 DEBUG(DEBUG_CRIT,("Public address '%s' is missing and we should serve this ip\n",
2598 ctdb_addr_to_str(&ips->ips[j].addr)));
2599 need_takeover_run = true;
2602 if (ctdb_sys_have_ip(&ips->ips[j].addr)) {
2603 DEBUG(DEBUG_CRIT,("We are still serving a public address '%s' that we should not be serving.\n",
2604 ctdb_addr_to_str(&ips->ips[j].addr)));
2605 need_takeover_run = true;
2611 if (need_takeover_run) {
2612 struct takeover_run_reply rd;
2615 DEBUG(DEBUG_CRIT,("Trigger takeoverrun\n"));
2619 data.dptr = (uint8_t *)&rd;
2620 data.dsize = sizeof(rd);
2622 ret = ctdb_client_send_message(ctdb, rec->recmaster, CTDB_SRVID_TAKEOVER_RUN, data);
2624 DEBUG(DEBUG_ERR,(__location__ " Failed to send ipreallocate to recmaster :%d\n", (int)rec->recmaster));
2627 talloc_free(mem_ctx);
2632 static void async_getnodemap_callback(struct ctdb_context *ctdb, uint32_t node_pnn, int32_t res, TDB_DATA outdata, void *callback_data)
2634 struct ctdb_node_map **remote_nodemaps = callback_data;
2636 if (node_pnn >= ctdb->num_nodes) {
2637 DEBUG(DEBUG_ERR,(__location__ " pnn from invalid node\n"));
2641 remote_nodemaps[node_pnn] = (struct ctdb_node_map *)talloc_steal(remote_nodemaps, outdata.dptr);
2645 static int get_remote_nodemaps(struct ctdb_context *ctdb, TALLOC_CTX *mem_ctx,
2646 struct ctdb_node_map *nodemap,
2647 struct ctdb_node_map **remote_nodemaps)
2651 nodes = list_of_active_nodes(ctdb, nodemap, mem_ctx, true);
2652 if (ctdb_client_async_control(ctdb, CTDB_CONTROL_GET_NODEMAP,
2654 CONTROL_TIMEOUT(), false, tdb_null,
2655 async_getnodemap_callback,
2657 remote_nodemaps) != 0) {
2658 DEBUG(DEBUG_ERR, (__location__ " Unable to pull all remote nodemaps\n"));
2666 enum reclock_child_status { RECLOCK_CHECKING, RECLOCK_OK, RECLOCK_FAILED, RECLOCK_TIMEOUT};
2667 struct ctdb_check_reclock_state {
2668 struct ctdb_context *ctdb;
2669 struct timeval start_time;
2672 struct timed_event *te;
2673 struct fd_event *fde;
2674 enum reclock_child_status status;
2677 /* when we free the reclock state we must kill any child process.
2679 static int check_reclock_destructor(struct ctdb_check_reclock_state *state)
2681 struct ctdb_context *ctdb = state->ctdb;
2683 ctdb_ctrl_report_recd_lock_latency(ctdb, CONTROL_TIMEOUT(), timeval_elapsed(&state->start_time));
2685 if (state->fd[0] != -1) {
2686 close(state->fd[0]);
2689 if (state->fd[1] != -1) {
2690 close(state->fd[1]);
2693 kill(state->child, SIGKILL);
2698 called if our check_reclock child times out. this would happen if
2699 i/o to the reclock file blocks.
2701 static void ctdb_check_reclock_timeout(struct event_context *ev, struct timed_event *te,
2702 struct timeval t, void *private_data)
2704 struct ctdb_check_reclock_state *state = talloc_get_type(private_data,
2705 struct ctdb_check_reclock_state);
2707 DEBUG(DEBUG_ERR,(__location__ " check_reclock child process hung/timedout CFS slow to grant locks?\n"));
2708 state->status = RECLOCK_TIMEOUT;
2711 /* this is called when the child process has completed checking the reclock
2712 file and has written data back to us through the pipe.
2714 static void reclock_child_handler(struct event_context *ev, struct fd_event *fde,
2715 uint16_t flags, void *private_data)
2717 struct ctdb_check_reclock_state *state= talloc_get_type(private_data,
2718 struct ctdb_check_reclock_state);
2722 /* we got a response from our child process so we can abort the
2725 talloc_free(state->te);
2728 ret = read(state->fd[0], &c, 1);
2729 if (ret != 1 || c != RECLOCK_OK) {
2730 DEBUG(DEBUG_ERR,(__location__ " reclock child process returned error %d\n", c));
2731 state->status = RECLOCK_FAILED;
2736 state->status = RECLOCK_OK;
2740 static int check_recovery_lock(struct ctdb_context *ctdb)
2743 struct ctdb_check_reclock_state *state;
2744 pid_t parent = getpid();
2746 if (ctdb->recovery_lock_fd == -1) {
2747 DEBUG(DEBUG_CRIT,("recovery master doesn't have the recovery lock\n"));
2751 state = talloc(ctdb, struct ctdb_check_reclock_state);
2752 CTDB_NO_MEMORY(ctdb, state);
2755 state->start_time = timeval_current();
2756 state->status = RECLOCK_CHECKING;
2760 ret = pipe(state->fd);
2763 DEBUG(DEBUG_CRIT,(__location__ " Failed to open pipe for check_reclock child\n"));
2767 state->child = fork();
2768 if (state->child == (pid_t)-1) {
2769 DEBUG(DEBUG_CRIT,(__location__ " fork() failed in check_reclock child\n"));
2770 close(state->fd[0]);
2772 close(state->fd[1]);
2778 if (state->child == 0) {
2779 char cc = RECLOCK_OK;
2780 close(state->fd[0]);
2783 debug_extra = talloc_asprintf(NULL, "recovery-lock:");
2784 if (pread(ctdb->recovery_lock_fd, &cc, 1, 0) == -1) {
2785 DEBUG(DEBUG_CRIT,("failed read from recovery_lock_fd - %s\n", strerror(errno)));
2786 cc = RECLOCK_FAILED;
2789 write(state->fd[1], &cc, 1);
2790 /* make sure we die when our parent dies */
2791 while (kill(parent, 0) == 0 || errno != ESRCH) {
2793 write(state->fd[1], &cc, 1);
2797 close(state->fd[1]);
2799 set_close_on_exec(state->fd[0]);
2801 DEBUG(DEBUG_DEBUG, (__location__ " Created PIPE FD:%d for check_recovery_lock\n", state->fd[0]));
2803 talloc_set_destructor(state, check_reclock_destructor);
2805 state->te = event_add_timed(ctdb->ev, state, timeval_current_ofs(15, 0),
2806 ctdb_check_reclock_timeout, state);
2807 if (state->te == NULL) {
2808 DEBUG(DEBUG_CRIT,(__location__ " Failed to create a timed event for reclock child\n"));
2813 state->fde = event_add_fd(ctdb->ev, state, state->fd[0],
2815 reclock_child_handler,
2818 if (state->fde == NULL) {
2819 DEBUG(DEBUG_CRIT,(__location__ " Failed to create an fd event for reclock child\n"));
2823 tevent_fd_set_auto_close(state->fde);
2825 while (state->status == RECLOCK_CHECKING) {
2826 event_loop_once(ctdb->ev);
2829 if (state->status == RECLOCK_FAILED) {
2830 DEBUG(DEBUG_ERR,(__location__ " reclock child failed when checking file\n"));
2831 close(ctdb->recovery_lock_fd);
2832 ctdb->recovery_lock_fd = -1;
2841 static int update_recovery_lock_file(struct ctdb_context *ctdb)
2843 TALLOC_CTX *tmp_ctx = talloc_new(NULL);
2844 const char *reclockfile;
2846 if (ctdb_ctrl_getreclock(ctdb, CONTROL_TIMEOUT(), CTDB_CURRENT_NODE, tmp_ctx, &reclockfile) != 0) {
2847 DEBUG(DEBUG_ERR,("Failed to read reclock file from daemon\n"));
2848 talloc_free(tmp_ctx);
2852 if (reclockfile == NULL) {
2853 if (ctdb->recovery_lock_file != NULL) {
2854 DEBUG(DEBUG_ERR,("Reclock file disabled\n"));
2855 talloc_free(ctdb->recovery_lock_file);
2856 ctdb->recovery_lock_file = NULL;
2857 if (ctdb->recovery_lock_fd != -1) {
2858 close(ctdb->recovery_lock_fd);
2859 ctdb->recovery_lock_fd = -1;
2862 ctdb->tunable.verify_recovery_lock = 0;
2863 talloc_free(tmp_ctx);
2867 if (ctdb->recovery_lock_file == NULL) {
2868 ctdb->recovery_lock_file = talloc_strdup(ctdb, reclockfile);
2869 if (ctdb->recovery_lock_fd != -1) {
2870 close(ctdb->recovery_lock_fd);
2871 ctdb->recovery_lock_fd = -1;
2873 talloc_free(tmp_ctx);
2878 if (!strcmp(reclockfile, ctdb->recovery_lock_file)) {
2879 talloc_free(tmp_ctx);
2883 talloc_free(ctdb->recovery_lock_file);
2884 ctdb->recovery_lock_file = talloc_strdup(ctdb, reclockfile);
2885 ctdb->tunable.verify_recovery_lock = 0;
2886 if (ctdb->recovery_lock_fd != -1) {
2887 close(ctdb->recovery_lock_fd);
2888 ctdb->recovery_lock_fd = -1;
2891 talloc_free(tmp_ctx);
2895 static void main_loop(struct ctdb_context *ctdb, struct ctdb_recoverd *rec,
2896 TALLOC_CTX *mem_ctx)
2899 struct ctdb_node_map *nodemap=NULL;
2900 struct ctdb_node_map *recmaster_nodemap=NULL;
2901 struct ctdb_node_map **remote_nodemaps=NULL;
2902 struct ctdb_vnn_map *vnnmap=NULL;
2903 struct ctdb_vnn_map *remote_vnnmap=NULL;
2904 int32_t debug_level;
2909 /* verify that the main daemon is still running */
2910 if (kill(ctdb->ctdbd_pid, 0) != 0) {
2911 DEBUG(DEBUG_CRIT,("CTDB daemon is no longer available. Shutting down recovery daemon\n"));
2915 /* ping the local daemon to tell it we are alive */
2916 ctdb_ctrl_recd_ping(ctdb);
2918 if (rec->election_timeout) {
2919 /* an election is in progress */
2923 /* read the debug level from the parent and update locally */
2924 ret = ctdb_ctrl_get_debuglevel(ctdb, CTDB_CURRENT_NODE, &debug_level);
2926 DEBUG(DEBUG_ERR, (__location__ " Failed to read debuglevel from parent\n"));
2929 LogLevel = debug_level;
2932 /* We must check if we need to ban a node here but we want to do this
2933 as early as possible so we dont wait until we have pulled the node
2934 map from the local node. thats why we have the hardcoded value 20
2936 for (i=0; i<ctdb->num_nodes; i++) {
2937 struct ctdb_banning_state *ban_state;
2939 if (ctdb->nodes[i]->ban_state == NULL) {
2942 ban_state = (struct ctdb_banning_state *)ctdb->nodes[i]->ban_state;
2943 if (ban_state->count < 20) {
2946 DEBUG(DEBUG_NOTICE,("Node %u has caused %u recoveries recently - banning it for %u seconds\n",
2947 ctdb->nodes[i]->pnn, ban_state->count,
2948 ctdb->tunable.recovery_ban_period));
2949 ctdb_ban_node(rec, ctdb->nodes[i]->pnn, ctdb->tunable.recovery_ban_period);
2950 ban_state->count = 0;
2953 /* get relevant tunables */
2954 ret = ctdb_ctrl_get_all_tunables(ctdb, CONTROL_TIMEOUT(), CTDB_CURRENT_NODE, &ctdb->tunable);
2956 DEBUG(DEBUG_ERR,("Failed to get tunables - retrying\n"));
2960 /* get the current recovery lock file from the server */
2961 if (update_recovery_lock_file(ctdb) != 0) {
2962 DEBUG(DEBUG_ERR,("Failed to update the recovery lock file\n"));
2966 /* Make sure that if recovery lock verification becomes disabled when
2969 if (ctdb->tunable.verify_recovery_lock == 0) {
2970 if (ctdb->recovery_lock_fd != -1) {
2971 close(ctdb->recovery_lock_fd);
2972 ctdb->recovery_lock_fd = -1;
2976 pnn = ctdb_ctrl_getpnn(ctdb, CONTROL_TIMEOUT(), CTDB_CURRENT_NODE);
2977 if (pnn == (uint32_t)-1) {
2978 DEBUG(DEBUG_ERR,("Failed to get local pnn - retrying\n"));
2982 /* get the vnnmap */
2983 ret = ctdb_ctrl_getvnnmap(ctdb, CONTROL_TIMEOUT(), pnn, mem_ctx, &vnnmap);
2985 DEBUG(DEBUG_ERR, (__location__ " Unable to get vnnmap from node %u\n", pnn));
2990 /* get number of nodes */
2992 talloc_free(rec->nodemap);
2993 rec->nodemap = NULL;
2996 ret = ctdb_ctrl_getnodemap(ctdb, CONTROL_TIMEOUT(), pnn, rec, &rec->nodemap);
2998 DEBUG(DEBUG_ERR, (__location__ " Unable to get nodemap from node %u\n", pnn));
3001 nodemap = rec->nodemap;
3003 /* check which node is the recovery master */
3004 ret = ctdb_ctrl_getrecmaster(ctdb, mem_ctx, CONTROL_TIMEOUT(), pnn, &rec->recmaster);
3006 DEBUG(DEBUG_ERR, (__location__ " Unable to get recmaster from node %u\n", pnn));
3010 /* if we are not the recmaster we can safely ignore any ip reallocate requests */
3011 if (rec->recmaster != pnn) {
3012 if (rec->ip_reallocate_ctx != NULL) {
3013 talloc_free(rec->ip_reallocate_ctx);
3014 rec->ip_reallocate_ctx = NULL;
3015 rec->reallocate_callers = NULL;
3019 if (rec->recmaster == (uint32_t)-1) {
3020 DEBUG(DEBUG_NOTICE,(__location__ " Initial recovery master set - forcing election\n"));
3021 force_election(rec, pnn, nodemap);
3026 /* if the local daemon is STOPPED, we verify that the databases are
3027 also frozen and thet the recmode is set to active
3029 if (nodemap->nodes[pnn].flags & NODE_FLAGS_STOPPED) {
3030 ret = ctdb_ctrl_getrecmode(ctdb, mem_ctx, CONTROL_TIMEOUT(), CTDB_CURRENT_NODE, &ctdb->recovery_mode);
3032 DEBUG(DEBUG_ERR,(__location__ " Failed to read recmode from local node\n"));
3034 if (ctdb->recovery_mode == CTDB_RECOVERY_NORMAL) {
3035 DEBUG(DEBUG_ERR,("Node is stopped but recovery mode is not active. Activate recovery mode and lock databases\n"));
3037 ret = ctdb_ctrl_freeze_priority(ctdb, CONTROL_TIMEOUT(), CTDB_CURRENT_NODE, 1);
3039 DEBUG(DEBUG_ERR,(__location__ " Failed to freeze node due to node being STOPPED\n"));
3042 ret = ctdb_ctrl_setrecmode(ctdb, CONTROL_TIMEOUT(), CTDB_CURRENT_NODE, CTDB_RECOVERY_ACTIVE);
3044 DEBUG(DEBUG_ERR,(__location__ " Failed to activate recovery mode due to node being stopped\n"));
3051 /* If the local node is stopped, verify we are not the recmaster
3052 and yield this role if so
3054 if ((nodemap->nodes[pnn].flags & NODE_FLAGS_STOPPED) && (rec->recmaster == pnn)) {
3055 DEBUG(DEBUG_ERR,("Local node is STOPPED. Yielding recmaster role\n"));
3056 force_election(rec, pnn, nodemap);
3060 /* check that we (recovery daemon) and the local ctdb daemon
3061 agrees on whether we are banned or not
3065 /* remember our own node flags */
3066 rec->node_flags = nodemap->nodes[pnn].flags;
3068 /* count how many active nodes there are */
3069 rec->num_active = 0;
3070 rec->num_connected = 0;
3071 for (i=0; i<nodemap->num; i++) {
3072 if (!(nodemap->nodes[i].flags & NODE_FLAGS_INACTIVE)) {
3075 if (!(nodemap->nodes[i].flags & NODE_FLAGS_DISCONNECTED)) {
3076 rec->num_connected++;
3081 /* verify that the recmaster node is still active */
3082 for (j=0; j<nodemap->num; j++) {
3083 if (nodemap->nodes[j].pnn==rec->recmaster) {
3088 if (j == nodemap->num) {
3089 DEBUG(DEBUG_ERR, ("Recmaster node %u not in list. Force reelection\n", rec->recmaster));
3090 force_election(rec, pnn, nodemap);
3094 /* if recovery master is disconnected we must elect a new recmaster */
3095 if (nodemap->nodes[j].flags & NODE_FLAGS_DISCONNECTED) {
3096 DEBUG(DEBUG_NOTICE, ("Recmaster node %u is disconnected. Force reelection\n", nodemap->nodes[j].pnn));
3097 force_election(rec, pnn, nodemap);
3101 /* grap the nodemap from the recovery master to check if it is banned */
3102 ret = ctdb_ctrl_getnodemap(ctdb, CONTROL_TIMEOUT(), nodemap->nodes[j].pnn,
3103 mem_ctx, &recmaster_nodemap);
3105 DEBUG(DEBUG_ERR, (__location__ " Unable to get nodemap from recovery master %u\n",
3106 nodemap->nodes[j].pnn));
3111 if (recmaster_nodemap->nodes[j].flags & NODE_FLAGS_INACTIVE) {
3112 DEBUG(DEBUG_NOTICE, ("Recmaster node %u no longer available. Force reelection\n", nodemap->nodes[j].pnn));
3113 force_election(rec, pnn, nodemap);
3118 /* verify that we have all ip addresses we should have and we dont
3119 * have addresses we shouldnt have.
3121 if (ctdb->tunable.disable_ip_failover == 0) {
3122 if (rec->ip_check_disable_ctx == NULL) {
3123 if (verify_local_ip_allocation(ctdb, rec, pnn) != 0) {
3124 DEBUG(DEBUG_ERR, (__location__ " Public IPs were inconsistent.\n"));
3130 /* if we are not the recmaster then we do not need to check
3131 if recovery is needed
3133 if (pnn != rec->recmaster) {
3138 /* ensure our local copies of flags are right */
3139 ret = update_local_flags(rec, nodemap);
3140 if (ret == MONITOR_ELECTION_NEEDED) {
3141 DEBUG(DEBUG_NOTICE,("update_local_flags() called for a re-election.\n"));
3142 force_election(rec, pnn, nodemap);
3145 if (ret != MONITOR_OK) {
3146 DEBUG(DEBUG_ERR,("Unable to update local flags\n"));
3150 if (ctdb->num_nodes != nodemap->num) {
3151 DEBUG(DEBUG_ERR, (__location__ " ctdb->num_nodes (%d) != nodemap->num (%d) reloading nodes file\n", ctdb->num_nodes, nodemap->num));
3152 reload_nodes_file(ctdb);
3156 /* verify that all active nodes agree that we are the recmaster */
3157 switch (verify_recmaster(rec, nodemap, pnn)) {
3158 case MONITOR_RECOVERY_NEEDED:
3159 /* can not happen */
3161 case MONITOR_ELECTION_NEEDED:
3162 force_election(rec, pnn, nodemap);
3166 case MONITOR_FAILED:
3171 if (rec->need_recovery) {
3172 /* a previous recovery didn't finish */
3173 do_recovery(rec, mem_ctx, pnn, nodemap, vnnmap);
3177 /* verify that all active nodes are in normal mode
3178 and not in recovery mode
3180 switch (verify_recmode(ctdb, nodemap)) {
3181 case MONITOR_RECOVERY_NEEDED:
3182 do_recovery(rec, mem_ctx, pnn, nodemap, vnnmap);
3184 case MONITOR_FAILED:
3186 case MONITOR_ELECTION_NEEDED:
3187 /* can not happen */
3193 if (ctdb->tunable.verify_recovery_lock != 0) {
3194 /* we should have the reclock - check its not stale */
3195 ret = check_recovery_lock(ctdb);
3197 DEBUG(DEBUG_ERR,("Failed check_recovery_lock. Force a recovery\n"));
3198 ctdb_set_culprit(rec, ctdb->pnn);
3199 do_recovery(rec, mem_ctx, pnn, nodemap, vnnmap);
3204 /* if there are takeovers requested, perform it and notify the waiters */
3205 if (rec->reallocate_callers) {
3206 process_ipreallocate_requests(ctdb, rec);
3209 /* get the nodemap for all active remote nodes
3211 remote_nodemaps = talloc_array(mem_ctx, struct ctdb_node_map *, nodemap->num);
3212 if (remote_nodemaps == NULL) {
3213 DEBUG(DEBUG_ERR, (__location__ " failed to allocate remote nodemap array\n"));
3216 for(i=0; i<nodemap->num; i++) {
3217 remote_nodemaps[i] = NULL;
3219 if (get_remote_nodemaps(ctdb, mem_ctx, nodemap, remote_nodemaps) != 0) {
3220 DEBUG(DEBUG_ERR,(__location__ " Failed to read remote nodemaps\n"));
3224 /* verify that all other nodes have the same nodemap as we have
3226 for (j=0; j<nodemap->num; j++) {
3227 if (nodemap->nodes[j].flags & NODE_FLAGS_INACTIVE) {
3231 if (remote_nodemaps[j] == NULL) {
3232 DEBUG(DEBUG_ERR,(__location__ " Did not get a remote nodemap for node %d, restarting monitoring\n", j));
3233 ctdb_set_culprit(rec, j);
3238 /* if the nodes disagree on how many nodes there are
3239 then this is a good reason to try recovery
3241 if (remote_nodemaps[j]->num != nodemap->num) {
3242 DEBUG(DEBUG_ERR, (__location__ " Remote node:%u has different node count. %u vs %u of the local node\n",
3243 nodemap->nodes[j].pnn, remote_nodemaps[j]->num, nodemap->num));
3244 ctdb_set_culprit(rec, nodemap->nodes[j].pnn);
3245 do_recovery(rec, mem_ctx, pnn, nodemap, vnnmap);
3249 /* if the nodes disagree on which nodes exist and are
3250 active, then that is also a good reason to do recovery
3252 for (i=0;i<nodemap->num;i++) {
3253 if (remote_nodemaps[j]->nodes[i].pnn != nodemap->nodes[i].pnn) {
3254 DEBUG(DEBUG_ERR, (__location__ " Remote node:%u has different nodemap pnn for %d (%u vs %u).\n",
3255 nodemap->nodes[j].pnn, i,
3256 remote_nodemaps[j]->nodes[i].pnn, nodemap->nodes[i].pnn));
3257 ctdb_set_culprit(rec, nodemap->nodes[j].pnn);
3258 do_recovery(rec, mem_ctx, pnn, nodemap,
3264 /* verify the flags are consistent
3266 for (i=0; i<nodemap->num; i++) {
3267 if (nodemap->nodes[i].flags & NODE_FLAGS_DISCONNECTED) {
3271 if (nodemap->nodes[i].flags != remote_nodemaps[j]->nodes[i].flags) {
3272 DEBUG(DEBUG_ERR, (__location__ " Remote node:%u has different flags for node %u. It has 0x%02x vs our 0x%02x\n",
3273 nodemap->nodes[j].pnn,
3274 nodemap->nodes[i].pnn,
3275 remote_nodemaps[j]->nodes[i].flags,
3276 nodemap->nodes[j].flags));
3278 DEBUG(DEBUG_ERR,("Use flags 0x%02x from remote node %d for cluster update of its own flags\n", remote_nodemaps[j]->nodes[i].flags, j));
3279 update_flags_on_all_nodes(ctdb, nodemap, nodemap->nodes[i].pnn, remote_nodemaps[j]->nodes[i].flags);
3280 ctdb_set_culprit(rec, nodemap->nodes[j].pnn);
3281 do_recovery(rec, mem_ctx, pnn, nodemap,
3285 DEBUG(DEBUG_ERR,("Use flags 0x%02x from local recmaster node for cluster update of node %d flags\n", nodemap->nodes[i].flags, i));
3286 update_flags_on_all_nodes(ctdb, nodemap, nodemap->nodes[i].pnn, nodemap->nodes[i].flags);
3287 ctdb_set_culprit(rec, nodemap->nodes[j].pnn);
3288 do_recovery(rec, mem_ctx, pnn, nodemap,
3297 /* there better be the same number of lmasters in the vnn map
3298 as there are active nodes or we will have to do a recovery
3300 if (vnnmap->size != rec->num_active) {
3301 DEBUG(DEBUG_ERR, (__location__ " The vnnmap count is different from the number of active nodes. %u vs %u\n",
3302 vnnmap->size, rec->num_active));
3303 ctdb_set_culprit(rec, ctdb->pnn);
3304 do_recovery(rec, mem_ctx, pnn, nodemap, vnnmap);
3308 /* verify that all active nodes in the nodemap also exist in
3311 for (j=0; j<nodemap->num; j++) {
3312 if (nodemap->nodes[j].flags & NODE_FLAGS_INACTIVE) {
3315 if (nodemap->nodes[j].pnn == pnn) {
3319 for (i=0; i<vnnmap->size; i++) {
3320 if (vnnmap->map[i] == nodemap->nodes[j].pnn) {
3324 if (i == vnnmap->size) {
3325 DEBUG(DEBUG_ERR, (__location__ " Node %u is active in the nodemap but did not exist in the vnnmap\n",
3326 nodemap->nodes[j].pnn));
3327 ctdb_set_culprit(rec, nodemap->nodes[j].pnn);
3328 do_recovery(rec, mem_ctx, pnn, nodemap, vnnmap);
3334 /* verify that all other nodes have the same vnnmap
3335 and are from the same generation
3337 for (j=0; j<nodemap->num; j++) {
3338 if (nodemap->nodes[j].flags & NODE_FLAGS_INACTIVE) {
3341 if (nodemap->nodes[j].pnn == pnn) {
3345 ret = ctdb_ctrl_getvnnmap(ctdb, CONTROL_TIMEOUT(), nodemap->nodes[j].pnn,
3346 mem_ctx, &remote_vnnmap);
3348 DEBUG(DEBUG_ERR, (__location__ " Unable to get vnnmap from remote node %u\n",
3349 nodemap->nodes[j].pnn));
3353 /* verify the vnnmap generation is the same */
3354 if (vnnmap->generation != remote_vnnmap->generation) {
3355 DEBUG(DEBUG_ERR, (__location__ " Remote node %u has different generation of vnnmap. %u vs %u (ours)\n",
3356 nodemap->nodes[j].pnn, remote_vnnmap->generation, vnnmap->generation));
3357 ctdb_set_culprit(rec, nodemap->nodes[j].pnn);
3358 do_recovery(rec, mem_ctx, pnn, nodemap, vnnmap);
3362 /* verify the vnnmap size is the same */
3363 if (vnnmap->size != remote_vnnmap->size) {
3364 DEBUG(DEBUG_ERR, (__location__ " Remote node %u has different size of vnnmap. %u vs %u (ours)\n",
3365 nodemap->nodes[j].pnn, remote_vnnmap->size, vnnmap->size));
3366 ctdb_set_culprit(rec, nodemap->nodes[j].pnn);
3367 do_recovery(rec, mem_ctx, pnn, nodemap, vnnmap);
3371 /* verify the vnnmap is the same */
3372 for (i=0;i<vnnmap->size;i++) {
3373 if (remote_vnnmap->map[i] != vnnmap->map[i]) {
3374 DEBUG(DEBUG_ERR, (__location__ " Remote node %u has different vnnmap.\n",
3375 nodemap->nodes[j].pnn));
3376 ctdb_set_culprit(rec, nodemap->nodes[j].pnn);
3377 do_recovery(rec, mem_ctx, pnn, nodemap,
3384 /* we might need to change who has what IP assigned */
3385 if (rec->need_takeover_run) {
3386 uint32_t culprit = (uint32_t)-1;
3388 rec->need_takeover_run = false;
3390 /* update the list of public ips that a node can handle for
3393 ret = ctdb_reload_remote_public_ips(ctdb, rec, nodemap, &culprit);
3395 DEBUG(DEBUG_ERR,("Failed to read public ips from remote node %d\n",
3397 ctdb_set_culprit(rec, culprit);
3398 do_recovery(rec, mem_ctx, pnn, nodemap, vnnmap);
3402 /* execute the "startrecovery" event script on all nodes */
3403 ret = run_startrecovery_eventscript(rec, nodemap);
3405 DEBUG(DEBUG_ERR, (__location__ " Unable to run the 'startrecovery' event on cluster\n"));
3406 ctdb_set_culprit(rec, ctdb->pnn);
3407 do_recovery(rec, mem_ctx, pnn, nodemap, vnnmap);
3411 ret = ctdb_takeover_run(ctdb, nodemap);
3413 DEBUG(DEBUG_ERR, (__location__ " Unable to setup public takeover addresses - starting recovery\n"));
3414 ctdb_set_culprit(rec, ctdb->pnn);
3415 do_recovery(rec, mem_ctx, pnn, nodemap, vnnmap);
3419 /* execute the "recovered" event script on all nodes */
3420 ret = run_recovered_eventscript(ctdb, nodemap, "monitor_cluster");
3422 // we cant check whether the event completed successfully
3423 // since this script WILL fail if the node is in recovery mode
3424 // and if that race happens, the code here would just cause a second
3425 // cascading recovery.
3427 DEBUG(DEBUG_ERR, (__location__ " Unable to run the 'recovered' event on cluster. Update of public ips failed.\n"));
3428 ctdb_set_culprit(rec, ctdb->pnn);
3429 do_recovery(rec, mem_ctx, pnn, nodemap, vnnmap);
3436 the main monitoring loop
3438 static void monitor_cluster(struct ctdb_context *ctdb)
3440 struct ctdb_recoverd *rec;
3442 DEBUG(DEBUG_NOTICE,("monitor_cluster starting\n"));
3444 rec = talloc_zero(ctdb, struct ctdb_recoverd);
3445 CTDB_NO_MEMORY_FATAL(ctdb, rec);
3449 rec->priority_time = timeval_current();
3451 /* register a message port for sending memory dumps */
3452 ctdb_client_set_message_handler(ctdb, CTDB_SRVID_MEM_DUMP, mem_dump_handler, rec);
3454 /* register a message port for recovery elections */
3455 ctdb_client_set_message_handler(ctdb, CTDB_SRVID_RECOVERY, election_handler, rec);
3457 /* when nodes are disabled/enabled */
3458 ctdb_client_set_message_handler(ctdb, CTDB_SRVID_SET_NODE_FLAGS, monitor_handler, rec);
3460 /* when we are asked to puch out a flag change */
3461 ctdb_client_set_message_handler(ctdb, CTDB_SRVID_PUSH_NODE_FLAGS, push_flags_handler, rec);
3463 /* register a message port for vacuum fetch */
3464 ctdb_client_set_message_handler(ctdb, CTDB_SRVID_VACUUM_FETCH, vacuum_fetch_handler, rec);
3466 /* register a message port for reloadnodes */
3467 ctdb_client_set_message_handler(ctdb, CTDB_SRVID_RELOAD_NODES, reload_nodes_handler, rec);
3469 /* register a message port for performing a takeover run */
3470 ctdb_client_set_message_handler(ctdb, CTDB_SRVID_TAKEOVER_RUN, ip_reallocate_handler, rec);
3472 /* register a message port for disabling the ip check for a short while */
3473 ctdb_client_set_message_handler(ctdb, CTDB_SRVID_DISABLE_IP_CHECK, disable_ip_check_handler, rec);
3475 /* register a message port for updating the recovery daemons node assignment for an ip */
3476 ctdb_client_set_message_handler(ctdb, CTDB_SRVID_RECD_UPDATE_IP, recd_update_ip_handler, rec);
3479 TALLOC_CTX *mem_ctx = talloc_new(ctdb);
3480 struct timeval start;
3484 DEBUG(DEBUG_CRIT,(__location__
3485 " Failed to create temp context\n"));
3489 start = timeval_current();
3490 main_loop(ctdb, rec, mem_ctx);
3491 talloc_free(mem_ctx);
3493 /* we only check for recovery once every second */
3494 elapsed = timeval_elapsed(&start);
3495 if (elapsed < ctdb->tunable.recover_interval) {
3496 ctdb_wait_timeout(ctdb, ctdb->tunable.recover_interval
3503 event handler for when the main ctdbd dies
3505 static void ctdb_recoverd_parent(struct event_context *ev, struct fd_event *fde,
3506 uint16_t flags, void *private_data)
3508 DEBUG(DEBUG_ALERT,("recovery daemon parent died - exiting\n"));
3513 called regularly to verify that the recovery daemon is still running
3515 static void ctdb_check_recd(struct event_context *ev, struct timed_event *te,
3516 struct timeval yt, void *p)
3518 struct ctdb_context *ctdb = talloc_get_type(p, struct ctdb_context);
3520 if (kill(ctdb->recoverd_pid, 0) != 0) {
3521 DEBUG(DEBUG_ERR,("Recovery daemon (pid:%d) is no longer running. Shutting down main daemon\n", (int)ctdb->recoverd_pid));
3523 ctdb_stop_recoverd(ctdb);
3524 ctdb_stop_keepalive(ctdb);
3525 ctdb_stop_monitoring(ctdb);
3526 ctdb_release_all_ips(ctdb);
3527 if (ctdb->methods != NULL) {
3528 ctdb->methods->shutdown(ctdb);
3530 ctdb_event_script(ctdb, CTDB_EVENT_SHUTDOWN);
3535 event_add_timed(ctdb->ev, ctdb,
3536 timeval_current_ofs(30, 0),
3537 ctdb_check_recd, ctdb);
3540 static void recd_sig_child_handler(struct event_context *ev,
3541 struct signal_event *se, int signum, int count,
3545 // struct ctdb_context *ctdb = talloc_get_type(private_data, struct ctdb_context);
3550 pid = waitpid(-1, &status, WNOHANG);
3552 if (errno != ECHILD) {
3553 DEBUG(DEBUG_ERR, (__location__ " waitpid() returned error. errno:%s(%d)\n", strerror(errno),errno));
3558 DEBUG(DEBUG_DEBUG, ("RECD SIGCHLD from %d\n", (int)pid));
3564 startup the recovery daemon as a child of the main ctdb daemon
3566 int ctdb_start_recoverd(struct ctdb_context *ctdb)
3569 struct signal_event *se;
3570 struct tevent_fd *fde;
3572 if (pipe(fd) != 0) {
3576 ctdb->ctdbd_pid = getpid();
3578 ctdb->recoverd_pid = fork();
3579 if (ctdb->recoverd_pid == -1) {
3583 if (ctdb->recoverd_pid != 0) {
3585 event_add_timed(ctdb->ev, ctdb,
3586 timeval_current_ofs(30, 0),
3587 ctdb_check_recd, ctdb);
3593 srandom(getpid() ^ time(NULL));
3595 if (switch_from_server_to_client(ctdb, "recoverd") != 0) {
3596 DEBUG(DEBUG_CRIT, (__location__ "ERROR: failed to switch recovery daemon into client mode. shutting down.\n"));
3600 DEBUG(DEBUG_DEBUG, (__location__ " Created PIPE FD:%d to recovery daemon\n", fd[0]));
3602 fde = event_add_fd(ctdb->ev, ctdb, fd[0], EVENT_FD_READ,
3603 ctdb_recoverd_parent, &fd[0]);
3604 tevent_fd_set_auto_close(fde);
3606 /* set up a handler to pick up sigchld */
3607 se = event_add_signal(ctdb->ev, ctdb,
3609 recd_sig_child_handler,
3612 DEBUG(DEBUG_CRIT,("Failed to set up signal handler for SIGCHLD in recovery daemon\n"));
3616 monitor_cluster(ctdb);
3618 DEBUG(DEBUG_ALERT,("ERROR: ctdb_recoverd finished!?\n"));
3623 shutdown the recovery daemon
3625 void ctdb_stop_recoverd(struct ctdb_context *ctdb)
3627 if (ctdb->recoverd_pid == 0) {
3631 DEBUG(DEBUG_NOTICE,("Shutting down recovery daemon\n"));
3632 kill(ctdb->recoverd_pid, SIGTERM);