2 # script to manage nfs in a clustered environment
7 [ "$CTDB_MANAGES_NFS" = "yes" ] || exit 0
8 [ -z "$STATD_SHARED_DIRECTORY" ] && exit 0
13 PATH=/usr/bin:/bin:/usr/sbin:/sbin:$PATH
17 mkdir -p /etc/ctdb/state/nfs
18 /bin/mkdir -p /etc/ctdb/state/statd/ip
19 ctdb_wait_directories "nfslock" "$STATD_SHARED_DIRECTORY"
22 # wait for all nfs exported directories to become available
23 nfs_dirs=`grep -v '^#' < /etc/exports | cut -d' ' -f1`
24 ctdb_wait_directories "NFS" $nfs_dirs
26 # make sure nfs is stopped before we start it, or it may get a bind error
27 service nfs stop > /dev/null 2>&1
28 service nfslock stop > /dev/null 2>&1
43 echo $ip >> /etc/ctdb/state/statd/restart
45 # having a list of what IPs we have allows statd to do the right
46 # thing via /etc/ctdb/statd-callout
47 /bin/touch /etc/ctdb/state/statd/ip/$ip
56 echo $ip >> /etc/ctdb/state/nfs/restart
58 echo $ip >> /etc/ctdb/state/statd/restart
59 /bin/rm -f /etc/ctdb/state/statd/ip/$ip
64 # RST all tcp connections used for NFS to ensure that they do
65 # not survive in ESTABLISHED state across a failover/failback
66 # and create an ack storm
67 [ -f /etc/ctdb/state/nfs/restart ] && {
68 netstat -tn |egrep '^tcp.*\s+[0-9]+\.[0-9]+\.[0-9]+\.[0-9]+:2049\s+.*ESTABLISHED' | awk '{print $4" "$5}' | while read dest src; do
69 srcip=`echo $src | cut -d: -f1`
70 srcport=`echo $src | cut -d: -f2`
71 destip=`echo $dest | cut -d: -f1`
72 destport=`echo $dest | cut -d: -f2`
73 ctdb killtcp $srcip:$srcport $destip:$destport
74 ctdb killtcp $destip:$destport $srcip:$srcport
77 /bin/rm -f /etc/ctdb/state/nfs/restart
79 # if we have taken or released any ips we must send out
80 # statd notifications to recover lost nfs locks
81 [ -x /etc/ctdb/statd-callout ] && [ -f /etc/ctdb/state/statd/restart ] && {
82 /etc/ctdb/statd-callout notify &
85 /bin/rm -f /etc/ctdb/state/statd/restart
89 # check that NFS responds to rpc requests
90 ctdb_check_rpc "NFS" 100003 3
91 ctdb_check_rpc "mount" 100005 1
93 # and that its directories are available
94 nfs_dirs=`grep -v '^#' < /etc/exports | cut -d' ' -f1`
95 ctdb_check_directories "nfs" $nfs_dirs
97 # check that lockd responds to rpc requests
98 ctdb_check_rpc "statd" 100024 1
99 ctdb_check_rpc "lockd" 100021 1
100 ctdb_check_directories "statd" $STATD_SHARED_DIRECTORY