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https://github.com/samba-team/samba.git
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35ee7d4999
IF lvs has been configured, check that the ipvsadm package has also been installed since we depend on it. If not, log an error and return 1 (This used to be ctdb commit 506174bbc47f1176122be2e55099149e3db27d57)
93 lines
2.4 KiB
Bash
Executable File
93 lines
2.4 KiB
Bash
Executable File
#!/bin/sh
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# script to manage the lvs ip multiplexer for a single public address cluster
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. $CTDB_BASE/functions
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loadconfig ctdb
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[ -z "$CTDB_LVS_PUBLIC_IP" ] && exit 0
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[ -z "$CTDB_PUBLIC_INTERFACE" ] && exit 0
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[ -x /sbin/ipvsadm ] || {
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echo "LVS configured but /sbin/ipvsadm is not installed."
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exit 1
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}
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cmd="$1"
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shift
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PATH=/usr/bin:/bin:/usr/sbin:/sbin:$PATH
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case $cmd in
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startup)
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ipvsadm -D -t $CTDB_LVS_PUBLIC_IP:0
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ipvsadm -D -u $CTDB_LVS_PUBLIC_IP:0
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ip addr add $CTDB_LVS_PUBLIC_IP/32 dev lo scope host >/dev/null 2>/dev/null
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# do not respond to ARPs that are for ip addresses with scope 'host'
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echo 3 > /proc/sys/net/ipv4/conf/all/arp_ignore
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# do not send out arp requests from loopback addresses
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echo 2 > /proc/sys/net/ipv4/conf/all/arp_announce
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;;
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shutdown)
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ipvsadm -D -t $CTDB_LVS_PUBLIC_IP:0
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ipvsadm -D -u $CTDB_LVS_PUBLIC_IP:0
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# remove the ip
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ip addr del $CTDB_LVS_PUBLIC_IP/32 dev lo >/dev/null 2>/dev/null
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# flush our route cache
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echo 1 > /proc/sys/net/ipv4/route/flush
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;;
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takeip)
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;;
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releaseip)
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;;
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recovered)
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# kill off any tcp connections
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ipvsadm -D -t $CTDB_LVS_PUBLIC_IP:0
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ipvsadm -D -u $CTDB_LVS_PUBLIC_IP:0
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kill_tcp_connections $CTDB_LVS_PUBLIC_IP
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# are we the recmaster ?
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ctdb isnotrecmaster >/dev/null 2>/dev/null || {
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# change the ip address to have scope host so we wont respond
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# to arps
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ip addr del $CTDB_LVS_PUBLIC_IP/32 dev lo >/dev/null 2>/dev/null
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ip addr add $CTDB_LVS_PUBLIC_IP/32 dev lo scope host >/dev/null 2>/dev/null
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exit 0
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}
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# change the scope so we start responding to arps
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ip addr del $CTDB_LVS_PUBLIC_IP/32 dev lo >/dev/null 2>/dev/null
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ip addr add $CTDB_LVS_PUBLIC_IP/32 dev lo >/dev/null 2>/dev/null
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ipvsadm -A -t $CTDB_LVS_PUBLIC_IP:0 -p 9999 -s lc
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ipvsadm -A -u $CTDB_LVS_PUBLIC_IP:0 -p 9999 -s lc
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ctdb status 2>/dev/null | egrep "^pnn:" | grep -v DISCONNECTED | grep -v "(THIS NODE)" | sed -e "s/^pnn:[0-9]* //" -e "s/[ ].*//" | while read IP; do
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ipvsadm -a -t $CTDB_LVS_PUBLIC_IP:0 -r $IP -g
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ipvsadm -a -u $CTDB_LVS_PUBLIC_IP:0 -r $IP -g
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done
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ipvsadm -a -t $CTDB_LVS_PUBLIC_IP:0 -r 127.0.0.1
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ipvsadm -a -u $CTDB_LVS_PUBLIC_IP:0 -r 127.0.0.1
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# send out a gratious arp so our peers will update their arp tables
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ctdb gratiousarp $CTDB_LVS_PUBLIC_IP $CTDB_PUBLIC_INTERFACE >/dev/null 2>/dev/null
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# flush our route cache
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echo 1 > /proc/sys/net/ipv4/route/flush
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;;
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monitor)
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;;
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esac
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exit 0
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