3 #################################
4 # interface event script for ctdb
5 # this adds/removes IPs from your
11 [ -z "$CTDB_PUBLIC_ADDRESSES" ] && {
12 CTDB_PUBLIC_ADDRESSES=$CTDB_BASE/public_addresses
15 [ ! -f "$CTDB_PUBLIC_ADDRESSES" ] && {
16 echo "No public addresses file found. Nothing to do for 10.interfaces"
21 #############################
22 # called when ctdbd starts up
24 # make sure that we only respond to ARP messages from the NIC where
25 # a particular ip address is associated.
26 [ -f /proc/sys/net/ipv4/conf/all/arp_filter ] && {
27 echo 1 > /proc/sys/net/ipv4/conf/all/arp_filter
29 cat "$CTDB_PUBLIC_ADDRESSES" | cut -d/ -f1 | while read _IP; do
30 _IP_HELD=`/sbin/ip addr show | grep "inet $_IP/"`
31 [ -z "$_IP_HELD" ] || {
32 _IFACE=`echo $_IP_HELD | sed -e "s/.*\s//"`
33 _NM=`echo $_IP_HELD | sed -e "s/.*$_IP\///" -e "s/\s.*//"`
34 echo "Removing public address $_IP/$_NM from device $_IFACE"
35 /sbin/ip addr del $_IP/$_NM dev $_IFACE
41 ################################################
42 # called when ctdbd wants to claim an IP address
45 echo "must supply interface, IP and maskbits"
52 add_ip_to_iface $iface $ip $maskbits || {
56 # cope with the script being killed while we have the interface blocked
57 iptables -D INPUT -i $iface -d $ip -j DROP 2> /dev/null
59 # flush our route cache
60 echo 1 > /proc/sys/net/ipv4/route/flush
64 ##################################################
65 # called when ctdbd wants to release an IP address
68 echo "must supply interface, IP and maskbits"
72 # releasing an IP is a bit more complex than it seems. Once the IP
73 # is released, any open tcp connections to that IP on this host will end
74 # up being stuck. Some of them (such as NFS connections) will be unkillable
75 # so we need to use the killtcp ctdb function to kill them off. We also
76 # need to make sure that no new connections get established while we are
77 # doing this! So what we do is this:
78 # 1) firewall this IP, so no new external packets arrive for it
79 # 2) use netstat -tn to find existing connections, and kill them
80 # 3) remove the IP from the interface
81 # 4) remove the firewall rule
87 # we do an extra delete to cope with the script being killed
88 iptables -D INPUT -i $iface -d $ip -j DROP 2> /dev/null
89 iptables -I INPUT -i $iface -d $ip -j DROP
90 kill_tcp_connections $ip
92 delete_ip_from_iface $iface $ip $maskbits || {
93 iptables -D INPUT -i $iface -d $ip -j DROP 2> /dev/null
97 iptables -D INPUT -i $iface -d $ip -j DROP 2> /dev/null
99 # flush our route cache
100 echo 1 > /proc/sys/net/ipv4/route/flush
104 ###########################################
105 # called when ctdbd has finished a recovery
109 ####################################
110 # called when ctdbd is shutting down
115 INTERFACES=`cat $CTDB_PUBLIC_ADDRESSES |
116 sed -e "s/^[^\t ]*[\t ]*//" -e "s/[\t ]*$//"`
118 [ "$CTDB_PUBLIC_INTERFACE" ] && INTERFACES="$CTDB_PUBLIC_INTERFACE $INTERFACES"
119 [ "$CTDB_NATGW_PUBLIC_IFACE" ] && INTERFACES="$CTDB_NATGW_PUBLIC_IFACE $INTERFACES"
121 INTERFACES=`for IFACE in $INTERFACES ; do echo $IFACE ; done | sort | uniq`
123 for IFACE in $INTERFACES ; do
124 # These interfaces are sometimes bond devices
125 # When we use VLANs for bond interfaces, there will only
126 # be an entry in /proc for the underlying real interface
127 REALIFACE=`echo $IFACE |sed -e 's/\..*$//'`
128 [ -f /proc/net/bonding/$REALIFACE ] && {
129 grep -q 'Currently Active Slave: None' /proc/net/bonding/$REALIFACE && {
130 echo "ERROR: No active slaves for bond device $REALIFACE"
133 grep -q '^MII Status: up' /proc/net/bonding/$REALIFACE || {
134 echo "ERROR: public network interface $REALIFACE is down"
142 # we dont know how to test ib links
146 /usr/sbin/ethtool $IFACE | grep -q 'Link detected: yes' || {
147 # On some systems, this is not successful when a
148 # cable is plugged but the interface has not been
149 # brought up previously. Bring the interface up and
151 /sbin/ip link set $IFACE up
152 /usr/sbin/ethtool $IFACE | grep -q 'Link detected: yes' || {
153 echo "ERROR: No link on the public network interface $IFACE"
163 ctdb_standard_event_handler "$@"