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#!/bin/bash
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set -e
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# Configuration Fallbacks. All can(must for some of them) be overwritten by /etc/default/snf-network
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TTL=300
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# the bind server IP/FQDN
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source /etc/default/snf-network
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if [ -z "$SERVER" -o -z "$FZONE" -o -z "$KEYFILE" ]; then
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if [ -z "$SERVER" -o -z "$FZONE" -o ! -e "$KEYFILE" ]; then
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exit 0
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fi
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# nsupdate will attempt determine the correct zone to update based on the rest of the input
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send_command () {
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local command="$1"
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nsupdate -k $KEYFILE > /dev/null << EOF
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server $SERVER
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$command
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send
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local command="$1"
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hooks-log dnshook "$command"
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nsupdate -k $KEYFILE > /dev/null << EOF
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server $SERVER
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$command
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send
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EOF
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}
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addremove_arecord () {
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update_arecord () {
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local action=$1
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local command=
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command="update $action $GANETI_INSTANCE_NAME.$FZONE $TTL A $IP"
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send_command "$command"
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fi
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}
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update_aaaarecord () {
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local action=$1
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local command=
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if [ -n "$EUI64" ]; then
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command="update $action $GANETI_INSTANCE_NAME.$FZONE $TTL AAAA $EUI64"
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send_command "$command"
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}
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addremove_ptrrecord () {
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update_ptrrecord () {
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local action=$1
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local command=
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if [ -n "$IP" ]; then
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command="update $action $RLPART.$RZONE. $TTL PTR $GANETI_INSTANCE_NAME.$FZONE"
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command="update $action $RLPART.$RZONE. $TTL PTR $GANETI_INSTANCE_NAME.$FZONE"
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send_command "$command"
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fi
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}
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update_ptr6record () {
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local action=$1
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local command=
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if [ -n "$EUI64" ]; then
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command="update $action $R6LPART.$R6ZONE. $TTL PTR $GANETI_INSTANCE_NAME.$FZONE"
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command="update $action $R6LPART$R6ZONE. $TTL PTR $GANETI_INSTANCE_NAME.$FZONE"
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send_command "$command"
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fi
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}
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update_all () {
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local action=$1
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update_arecord $action
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update_aaaarecord $action
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update_ptrrecord $action
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update_ptr6record $action
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}
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# first argument is an eui64 (IPv6)
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# sets GLOBAL args R6REC, R6ZONE, R6LPART
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# lets assume eui64=eui64=2001:648:2ffc:1::1
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# lets assume eui64=2001:648:2ffc:1::1
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# the following commands produce:
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# R6REC=1.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.1.0.0.0.c.f.f.2.8.4.6.0.1.0.0.2.ip6.arpa
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# R6ZONE=1.0.0.0.c.f.f.2.8.4.6.0.1.0.0.2.ip6.arpa
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update_dns () {
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if [ "x$GANETI_OP_CODE" = "xOP_INSTANCE_CREATE" ]; then
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update_arecord add
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update_ptrrecord add
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update_all add
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elif [ "x$GANETI_OP_CODE" = "xOP_INSTANCE_REMOVE" ]; then
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update_arecord delete
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update_ptrrecord delete
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update_all delete
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elif [ "x$GANETI_OP_CODE" = "xOP_INSTANCE_RENAME" ]; then
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update_arecord delete
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update_ptrrecord delete
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update_all delete
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# Let's override a variable and add ourselves
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GANETI_INSTANCE_NAME=$GANETI_INSTANCE_NEW_NAME
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update_arecord add
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update_ptrrecord add
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update_all add
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elif [ "x$GANETI_OP_CODE" = "xOP_INSTANCE_STARTUP" ]; then
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update_arecord add
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update_ptrrecord add
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update_all add
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elif [ "x$GANETI_OP_CODE" = "xOP_INSTANCE_SHUTDOWN" ]; then
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update_arecord delete
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update_ptrrecord delete
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update_all delete
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elif [ "x$GANETI_OP_CODE" = "xOP_INSTANCE_REBOOT" ]; then
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update_arecord add
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update_ptrrecord add
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update_all add
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elif [ "x$GANETI_OP_CODE" = "xOP_INSTANCE_SET_PARAMS" ]; then
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update_arecord add
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update_ptrrecord add
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update_all add
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fi
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}
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if [ "x$GANETI_OP_CODE" = "xOP_INSTANCE_SET_PARAMS" ]; then
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query_dns
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# This should remove the A, AAAA, CNAME entries
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run_action "update delete $GANETI_INSTANCE_NAME.$FZONE"
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send_command "update delete $GANETI_INSTANCE_NAME.$FZONE"
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for ip in $HOST_IP_ALL; do
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get_rev4_info $ip
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# This should remove the IPv4 reverse entry
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run_action "update delete $RLPART.$RZONE"
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send_command "update delete $RLPART.$RZONE"
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done
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for ip6 in $HOST_IP6_ALL; do
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get_rev6_info $ip6
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# This should remove the IPv6 reverse entry
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run_action "update delete $R6LPART$R6ZONE."
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send_command "update delete $R6LPART$R6ZONE."
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done
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fi
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# Main starts here
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# Exit if we do not have instance name.
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# It should be exported to hooks for instance related opcodes.
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if [ -z "$GANETI_INSTNACE_NAME" ]; then
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if [ -z "$GANETI_INSTANCE_NAME" ]; then
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exit 0
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fi
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get_rev4_info "$IP"
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get_eui64 "$MAC" "$SUBNET6"
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get_rev6_info "$EUI64"
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hooks-log dnshook "update dns for $GANETI_INSTANCE_NAME $IP $EUI64"
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update_dns
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;;
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