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76 lines
1.5 KiB
Bash
Executable File
76 lines
1.5 KiB
Bash
Executable File
#!/bin/sh
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# ctdb event script for NFS tickle acks
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PATH=/bin:/usr/bin:$PATH
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. $CTDB_BASE/functions
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loadconfig ctdb
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loadconfig nfs
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cmd="$1"
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shift
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[ "$CTDB_MANAGES_NFS" = "yes" ] || exit 0
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[ -z "$NFS_TICKLE_SHARED_DIRECTORY" ] && exit 0
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case $cmd in
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startup)
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mkdir -p $CTDB_BASE/state/nfstickle
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mkdir -p $NFS_TICKLE_SHARED_DIRECTORY/`hostname`
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# we rely on fast tcp wait1 recycling
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echo 1 > /proc/sys/net/ipv4/tcp_tw_recycle
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exit 0
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;;
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takeip)
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iface=$1
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ip=$2
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shopt -s nullglob
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# first send a grat arp, to ensure the client knows the updated
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# mac address for this IP
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ctdb gratiousarp $ip $iface
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# send tickle acks for all the connections the old server had
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for f in $NFS_TICKLE_SHARED_DIRECTORY/*/$ip; do
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cat $f | while read dest; do
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dip=`echo $dest | cut -d: -f1`
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dport=`echo $dest | cut -d: -f2`
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# send three, in case of lost packets
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echo "Sending NFS tickle ack for $ip to $dip:$dport"
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for i in `seq 1 3`; do
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ctdb tickle $dip:$dport $ip:2049
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done
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done
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done
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exit 0
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;;
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releaseip)
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exit 0
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;;
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recovered)
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exit 0
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;;
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shutdown)
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exit 0
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;;
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monitor)
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mydir=$NFS_TICKLE_SHARED_DIRECTORY/`hostname`
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rm -f $mydir/*
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# record our connections to shared storage
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netstat -tn |egrep '^tcp[[:space:]]+[0-9]+[[:space:]]+[0-9]+[[:space:]]+[0-9\.]+:2049.*ESTABLISHED' |
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awk '{print $4" "$5}' |
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while read dest src; do
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ip=`echo $dest | cut -d: -f1`
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echo $src >> $mydir/$ip
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done
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exit 0
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;;
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esac
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# ignore unknown commands
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exit 0
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