3 #################################
4 # interface event script for ctdb
5 # this adds/removes IPs from your
11 [ -z "$CTDB_PUBLIC_ADDRESSES" ] && {
12 CTDB_PUBLIC_ADDRESSES=$CTDB_BASE/public_addresses
15 [ ! -f "$CTDB_PUBLIC_ADDRESSES" ] && {
16 echo "No public addresses file found. Nothing to do for 10.interfaces"
20 add_failover_block() {
21 # Make sure our chain exists
22 iptables -N ctdbfailover 2> /dev/null
24 # make sure we link to it from INPUT
25 iptables -L INPUT -n | grep ctdbfailover >/dev/null 2>/dev/null || {
26 iptables -I INPUT -j ctdbfailover
29 iptables -I ctdbfailover -i $1 -d $2 -j DROP
32 delete_failover_block() {
33 iptables -D ctdbfailover -i $1 -d $2 -j DROP 2>/dev/null
36 delete_all_failover_blocks() {
37 # make sure to remova all links to the ctdbfailover table
38 while iptables -L INPUT -n | grep ctdbfailover >/dev/null 2>/dev/null ; do
39 iptables -D INPUT -j ctdbfailover
41 iptables -F ctdbfailover 2>/dev/null
42 iptables -X ctdbfailover 2>/dev/null
46 #############################
47 # called when ctdbd starts up
49 # make sure that we only respond to ARP messages from the NIC where
50 # a particular ip address is associated.
51 [ -f /proc/sys/net/ipv4/conf/all/arp_filter ] && {
52 echo 1 > /proc/sys/net/ipv4/conf/all/arp_filter
54 cat "$CTDB_PUBLIC_ADDRESSES" | cut -d/ -f1 | while read _IP; do
55 _IP_HELD=`/sbin/ip addr show | grep "inet $_IP/"`
56 [ -z "$_IP_HELD" ] || {
57 _IFACE=`echo $_IP_HELD | sed -e "s/.*\s//"`
58 _NM=`echo $_IP_HELD | sed -e "s/.*$_IP\///" -e "s/\s.*//"`
59 echo "Removing public address $_IP/$_NM from device $_IFACE"
60 /sbin/ip addr del $_IP/$_NM dev $_IFACE
66 ################################################
67 # called when ctdbd wants to claim an IP address
70 echo "must supply interface, IP and maskbits"
77 # we make sure the interface is up first
78 /sbin/ip link set $iface up || {
79 echo "Failed to bringup interface $iface"
82 /sbin/ip addr add $ip/$maskbits brd + dev $iface || {
83 echo "Failed to add $ip/$maskbits on dev $iface"
85 # cope with the script being killed while we have the interface blocked
86 delete_failover_block $iface $ip
88 # flush our route cache
89 echo 1 > /proc/sys/net/ipv4/route/flush
93 ##################################################
94 # called when ctdbd wants to release an IP address
97 echo "must supply interface, IP and maskbits"
101 # releasing an IP is a bit more complex than it seems. Once the IP
102 # is released, any open tcp connections to that IP on this host will end
103 # up being stuck. Some of them (such as NFS connections) will be unkillable
104 # so we need to use the killtcp ctdb function to kill them off. We also
105 # need to make sure that no new connections get established while we are
106 # doing this! So what we do is this:
107 # 1) firewall this IP, so no new external packets arrive for it
108 # 2) use netstat -tn to find existing connections, and kill them
109 # 3) remove the IP from the interface
110 # 4) remove the firewall rule
116 # we do an extra delete to cope with the script being killed
117 delete_failover_block $iface $ip
118 add_failover_block $iface $ip
119 kill_tcp_connections $ip
121 # the ip tool will delete all secondary IPs if this is the primary. To work around
122 # this _very_ annoying behaviour we have to keep a record of the secondaries and re-add
123 # them afterwards. yuck
125 if /sbin/ip addr list dev $iface primary | grep -q "inet $ip/$maskbits " ; then
126 secondaries=`/sbin/ip addr list dev $iface secondary | grep " inet " | awk '{print $2}'`
128 /sbin/ip addr del $ip/$maskbits dev $iface || failed=1
129 [ -z "$secondaries" ] || {
130 for i in $secondaries; do
131 if /sbin/ip addr list dev $iface | grep -q "inet $i" ; then
132 echo "kept secondary $i on dev $iface"
134 echo "re-adding secondary address $i to dev $iface"
135 /sbin/ip addr add $i dev $iface || failed=1
139 delete_failover_block $iface $ip
141 echo "Failed to del $ip on dev $iface"
145 # flush our route cache
146 echo 1 > /proc/sys/net/ipv4/route/flush
150 ###########################################
151 # called when ctdbd has finished a recovery
153 delete_all_failover_blocks
156 ####################################
157 # called when ctdbd is shutting down
159 delete_all_failover_blocks
163 # make sure we dont block any ips when we are outside of recovery
164 delete_all_failover_blocks
166 INTERFACES=`cat $CTDB_PUBLIC_ADDRESSES |
167 sed -e "s/^[^\t ]*[\t ]*//" -e "s/[\t ]*$//"`
169 [ "$CTDB_PUBLIC_INTERFACE" ] && INTERFACES="$CTDB_PUBLIC_INTERFACE $INTERFACES"
170 [ "$CTDB_NATGW_PUBLIC_IFACE" ] && INTERFACES="$CTDB_NATGW_PUBLIC_IFACE $INTERFACES"
172 INTERFACES=`for IFACE in $INTERFACES ; do echo $IFACE ; done | sort | uniq`
174 for IFACE in $INTERFACES ; do
175 # These interfaces are sometimes bond devices
176 # When we use VLANs for bond interfaces, there will only
177 # be an entry in /proc for the underlying real interface
178 REALIFACE=`echo $IFACE |sed -e 's/\..*$//'`
179 [ -f /proc/net/bonding/$REALIFACE ] && {
180 grep -q 'Currently Active Slave: None' /proc/net/bonding/$REALIFACE && {
181 echo "ERROR: No active slaves for bond device $REALIFACE"
184 grep -q '^MII Status: up' /proc/net/bonding/$REALIFACE || {
185 echo "ERROR: public network interface $REALIFACE is down"
193 # we dont know how to test ib links
197 [ "$(basename $(readlink /sys/class/net/$IFACE/device/driver))" = virtio_net ] ||
198 ethtool $IFACE | grep -q 'Link detected: yes' || {
199 # On some systems, this is not successful when a
200 # cable is plugged but the interface has not been
201 # brought up previously. Bring the interface up and
203 ip link set $IFACE up
204 ethtool $IFACE | grep -q 'Link detected: yes' || {
205 echo "ERROR: No link on the public network interface $IFACE"
215 ctdb_standard_event_handler "$@"