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dont restart the tcp service after a ip takeover, it is more efficient

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to just kill off the tcp connections

(This used to be ctdb commit bc481c3f1a44c50648488c4f8a7f15ec395d446f)
This commit is contained in:
Ronnie Sahlberg
2007-07-10 09:45:14 +10:00
parent a859723912
commit dbc66d054b
1 changed files with 11 additions and 5 deletions
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16
ctdb/config/events.d/60.nfs
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@ -61,12 +61,18 @@ case $cmd in
;;
recovered)
# restart NFS to ensure that all TCP connections to the released ip
# are closed
# RST all tcp connections used for NFS to ensure that they do
# not survive in ESTABLISHED state across a failover/failback
# and create an ack storm
[ -f /etc/ctdb/state/nfs/restart ] && {
( service nfs status > /dev/null 2>&1 &&
service nfs restart > /dev/null 2>&1 &&
service nfslock restart > /dev/null 2>&1 ) &
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
srcip=`echo $src | cut -d: -f1`
srcport=`echo $src | cut -d: -f2`
destip=`echo $dest | cut -d: -f1`
destport=`echo $dest | cut -d: -f2`
ctdb killtcp $srcip:$srcport $destip:$destport
ctdb killtcp $destip:$destport $srcip:$srcport
done
} > /dev/null 2>&1
/bin/rm -f /etc/ctdb/state/nfs/restart