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"
22 local INTERFACES=`cat $CTDB_PUBLIC_ADDRESSES |
23 sed -e "s/^[^\t ]*[\t ]*//" -e "s/,/ /g" -e "s/[\t ]*$//"`
25 [ "$CTDB_PUBLIC_INTERFACE" ] && INTERFACES="$CTDB_PUBLIC_INTERFACE $INTERFACES"
26 [ "$CTDB_NATGW_PUBLIC_IFACE" ] && INTERFACES="$CTDB_NATGW_PUBLIC_IFACE $INTERFACES"
28 local IFACES=`ctdb ifaces -Y | grep -v '^:Name:LinkStatus:References:'`
34 IFACE=`echo -n "$I" | cut -d ':' -f2`
35 INTERFACES="$IFACE $INTERFACES"
38 INTERFACES=`for IFACE in $INTERFACES ; do echo $IFACE ; done | sort | uniq`
43 for IFACE in $INTERFACES ; do
45 local OLDLINK=`echo -n "$IFACES" | grep "^:$IFACE:" | cut -d ':' -f3 | xargs`
46 test -z "$OLDLINK" && {
50 # These interfaces are sometimes bond devices
51 # When we use VLANs for bond interfaces, there will only
52 # be an entry in /proc for the underlying real interface
53 local REALIFACE=`echo $IFACE |sed -e 's/\..*$//'`
54 [ -f /proc/net/bonding/$REALIFACE ] && {
55 grep -q 'Currently Active Slave: None' /proc/net/bonding/$REALIFACE && {
56 echo "ERROR: No active slaves for bond device $REALIFACE"
58 test -n "$OLDLINK" && {
59 ctdb setifacelink $IFACE down
63 grep -q '^MII Status: up' /proc/net/bonding/$REALIFACE || {
64 echo "ERROR: public network interface $REALIFACE is down"
66 test -n "$OLDLINK" && {
67 ctdb setifacelink $IFACE down
71 test -n "$OLDLINK" && {
72 ok=1 # we only set ok for interfaces known to ctdbd
73 ctdb setifacelink $IFACE up
80 # we dont know how to test ib links
84 /usr/sbin/ethtool $IFACE | grep -q 'Link detected: yes' || {
85 # On some systems, this is not successful when a
86 # cable is plugged but the interface has not been
87 # brought up previously. Bring the interface up and
89 /sbin/ip link set $IFACE up
90 /usr/sbin/ethtool $IFACE | grep -q 'Link detected: yes' || {
91 echo "ERROR: No link on the public network interface $IFACE"
93 test -n "$OLDLINK" && {
94 ctdb setifacelink $IFACE down
99 test -n "$OLDLINK" && {
100 ok=1 # we only set ok for interfaces known to ctdbd
101 ctdb setifacelink $IFACE up
109 test x"$fail" = x"0" && {
113 test x"$force_fail" != x"0" && {
117 test x"$ok" = x"1" && {
125 #############################
126 # called when ctdbd starts up
128 # make sure that we only respond to ARP messages from the NIC where
129 # a particular ip address is associated.
130 [ -f /proc/sys/net/ipv4/conf/all/arp_filter ] && {
131 echo 1 > /proc/sys/net/ipv4/conf/all/arp_filter
133 cat "$CTDB_PUBLIC_ADDRESSES" | cut -d/ -f1 | while read _IP; do
134 _IP_HELD=`/sbin/ip addr show | grep "inet $_IP/"`
135 [ -z "$_IP_HELD" ] || {
136 _IFACE=`echo $_IP_HELD | sed -e "s/.*\s//"`
137 _NM=`echo $_IP_HELD | sed -e "s/.*$_IP\///" -e "s/\s.*//"`
138 echo "Removing public address $_IP/$_NM from device $_IFACE"
139 /sbin/ip addr del $_IP/$_NM dev $_IFACE
144 #############################
145 # called after ctdbd has done its initial recovery
146 # and we start the services to become healthy
153 ################################################
154 # called when ctdbd wants to claim an IP address
157 echo "must supply interface, IP and maskbits"
164 add_ip_to_iface $iface $ip $maskbits || {
168 # cope with the script being killed while we have the interface blocked
169 iptables -D INPUT -i $iface -d $ip -j DROP 2> /dev/null
171 # flush our route cache
172 echo 1 > /proc/sys/net/ipv4/route/flush
176 ##################################################
177 # called when ctdbd wants to release an IP address
180 echo "must supply interface, IP and maskbits"
184 # releasing an IP is a bit more complex than it seems. Once the IP
185 # is released, any open tcp connections to that IP on this host will end
186 # up being stuck. Some of them (such as NFS connections) will be unkillable
187 # so we need to use the killtcp ctdb function to kill them off. We also
188 # need to make sure that no new connections get established while we are
189 # doing this! So what we do is this:
190 # 1) firewall this IP, so no new external packets arrive for it
191 # 2) use netstat -tn to find existing connections, and kill them
192 # 3) remove the IP from the interface
193 # 4) remove the firewall rule
199 # we do an extra delete to cope with the script being killed
200 iptables -D INPUT -i $iface -d $ip -j DROP 2> /dev/null
201 iptables -I INPUT -i $iface -d $ip -j DROP
202 kill_tcp_connections $ip
204 delete_ip_from_iface $iface $ip $maskbits || {
205 iptables -D INPUT -i $iface -d $ip -j DROP 2> /dev/null
209 iptables -D INPUT -i $iface -d $ip -j DROP 2> /dev/null
211 # flush our route cache
212 echo 1 > /proc/sys/net/ipv4/route/flush
216 ###########################################
217 # called when ctdbd has finished a recovery
221 ####################################
222 # called when ctdbd is shutting down
230 test x"$ret" = x"2" && {
231 test x"$CTDB_PARTIALLY_ONLINE_INTERFACES" != x"yes" && {
234 # as long as we have one interface available don't become
239 test x"$ret" != x"0" && {
244 ctdb_standard_event_handler "$@"