Synnefo » snf-network

#!/bin/bash

# Configuration Fallbacks. All can(must for some of them) be overwritten by /etc/default/snf-network

TTL=300

# the bind server IP/FQDN

SERVER=""

# this is the .vm.synnefo.live.

# Leave empty if only reverse dns management is needed.

# TODO: make this zone to be instance specific!!!

FZONE=""

# the file with dns authorization keys

KEYFILE=""

source /etc/default/snf-network

source /usr/lib/snf-network/common.sh

if [ -z "$SERVER" -o -z "$FZONE" -o ! -e "$KEYFILE" ]; then

  exit 0

fi

# Query nameserver for entries related to the specific instance

# An example output is the following:

# www.google.com has address 173.194.113.114

# www.google.com has address 173.194.113.115

# www.google.com has address 173.194.113.116

# www.google.com has address 173.194.113.112

# www.google.com has address 173.194.113.113

# www.google.com has IPv6 address 2a00:1450:4001:80b::1012

query_dns () {

  HOSTQ="host -s -R 3 -W 3"

  HOST_IP_ALL=$($HOSTQ $GANETI_INSTANCE_NAME.$FZONE $SERVER | sed -n 's/.*has address //p')

  HOST_IP6_ALL=$($HOSTQ $GANETI_INSTANCE_NAME.$FZONE $SERVER | sed -n 's/.*has IPv6 address //p')

}

# Reset all entries related to the specific instance

# This should be invoced only during instance modification

# because we do not know which nics have been modify

reset_dns () {

  # This should remove the A, AAAA, CNAME entries

  send_command "update delete $GANETI_INSTANCE_NAME.$FZONE"

  for ip in $HOST_IP_ALL; do

    get_rev4_info $ip

    # This should remove the IPv4 reverse entry

    send_command "update delete $RLPART.$RZONE"

  done

  for ip6 in $HOST_IP6_ALL; do

    get_rev6_info $ip6

    # This should remove the IPv6 reverse entry

    send_command "update delete $R6LPART$R6ZONE."

  done

}

rename_instance (){

  for ip in $HOST_IP_ALL; do

    get_rev4_info $ip

    (

      GANETI_INSTANCE_NAME=$GANETI_INSTANCE_NEW_NAME

      IP=$ip

      update_arecord add

      update_ptrrecord add

    )

  done

  for ip6 in $HOST_IP6_ALL; do

    get_rev6_info $ip6

    (

      GANETI_INSTANCE_NAME=$GANETI_INSTANCE_NEW_NAME

      EUI64=$ip6

      update_aaaarecord add

      update_ptr6record add

    )

  done

}

# Main starts here

# Exit if we do not have instance name.

# It should be exported to hooks for instance related opcodes.

if [ -z "$GANETI_INSTANCE_NAME" ]; then

  exit 0

fi

if [ "x$GANETI_OP_CODE" = "xOP_INSTANCE_REMOVE" ]; then

  query_dns

  reset_dns

elif [ "x$GANETI_OP_CODE" = "xOP_INSTANCE_RENAME" ]; then

  query_dns

  reset_dns

  rename_instance

elif [ "x$GANETI_OP_CODE" = "xOP_INSTANCE_SHUTDOWN" ]; then

  query_dns

  reset_dns

fi