2 # script to manage the lvs ip multiplexer for a single public address cluster
7 [ -z "$CTDB_LVS_PUBLIC_IP" ] && exit 0
8 [ -z "$CTDB_PUBLIC_INTERFACE" ] && exit 0
10 [ -x /sbin/ipvsadm ] || {
11 echo "LVS configured but /sbin/ipvsadm is not installed."
19 PATH=/usr/bin:/bin:/usr/sbin:/sbin:$PATH
23 ipvsadm -D -t $CTDB_LVS_PUBLIC_IP:0
24 ipvsadm -D -u $CTDB_LVS_PUBLIC_IP:0
26 ip addr add $CTDB_LVS_PUBLIC_IP/32 dev lo scope host >/dev/null 2>/dev/null
28 # do not respond to ARPs that are for ip addresses with scope 'host'
29 echo 3 > /proc/sys/net/ipv4/conf/all/arp_ignore
30 # do not send out arp requests from loopback addresses
31 echo 2 > /proc/sys/net/ipv4/conf/all/arp_announce
35 ipvsadm -D -t $CTDB_LVS_PUBLIC_IP:0
36 ipvsadm -D -u $CTDB_LVS_PUBLIC_IP:0
39 ip addr del $CTDB_LVS_PUBLIC_IP/32 dev lo >/dev/null 2>/dev/null
41 # flush our route cache
42 echo 1 > /proc/sys/net/ipv4/route/flush
52 # kill off any tcp connections
53 ipvsadm -D -t $CTDB_LVS_PUBLIC_IP:0
54 ipvsadm -D -u $CTDB_LVS_PUBLIC_IP:0
55 kill_tcp_connections $CTDB_LVS_PUBLIC_IP
57 # are we the recmaster ?
58 ctdb isnotrecmaster >/dev/null 2>/dev/null || {
59 # change the ip address to have scope host so we wont respond
61 ip addr del $CTDB_LVS_PUBLIC_IP/32 dev lo >/dev/null 2>/dev/null
62 ip addr add $CTDB_LVS_PUBLIC_IP/32 dev lo scope host >/dev/null 2>/dev/null
66 # change the scope so we start responding to arps
67 ip addr del $CTDB_LVS_PUBLIC_IP/32 dev lo >/dev/null 2>/dev/null
68 ip addr add $CTDB_LVS_PUBLIC_IP/32 dev lo >/dev/null 2>/dev/null
70 ipvsadm -A -t $CTDB_LVS_PUBLIC_IP:0 -p 9999 -s lc
71 ipvsadm -A -u $CTDB_LVS_PUBLIC_IP:0 -p 9999 -s lc
73 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
74 ipvsadm -a -t $CTDB_LVS_PUBLIC_IP:0 -r $IP -g
75 ipvsadm -a -u $CTDB_LVS_PUBLIC_IP:0 -r $IP -g
77 ipvsadm -a -t $CTDB_LVS_PUBLIC_IP:0 -r 127.0.0.1
78 ipvsadm -a -u $CTDB_LVS_PUBLIC_IP:0 -r 127.0.0.1
80 # send out a gratious arp so our peers will update their arp tables
81 ctdb gratiousarp $CTDB_LVS_PUBLIC_IP $CTDB_PUBLIC_INTERFACE >/dev/null 2>/dev/null
83 # flush our route cache
84 echo 1 > /proc/sys/net/ipv4/route/flush