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gnt-networking-dnshook.in
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gnt-networking-dnshook.in
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#!/bin/bash
#
# Copyright 2014-2017 GRNET S.A. All rights reserved.
#
# Redistribution and use in source and binary forms, with or
# without modification, are permitted provided that the following
# conditions are met:
#
# 1. Redistributions of source code must retain the above
# copyright notice, this list of conditions and the following
# disclaimer.
#
# 2. Redistributions in binary form must reproduce the above
# copyright notice, this list of conditions and the following
# disclaimer in the documentation and/or other materials
# provided with the distribution.
#
# THIS SOFTWARE IS PROVIDED BY GRNET S.A. ``AS IS'' AND ANY EXPRESS
# OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
# WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
# PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL GRNET S.A OR
# CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
# USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
# AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
# ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
# POSSIBILITY OF SUCH DAMAGE.
#
# The views and conclusions contained in the software and
# documentation are those of the authors and should not be
# interpreted as representing official policies, either expressed
# or implied, of GRNET S.A.
source @datadir@/gnt-networking/common.sh
# override DNS settings by dnshook.conf
if [ -e /etc/ganeti/dnshook.conf ]; then
source /etc/ganeti/dnshook.conf
fi
if [ -z "$SERVER" ]; then
log "SERVER not defined! Aborting.."
exit 0
fi
# Exit if we do not have instance name.
# It should be exported to hooks for instance related opcodes.
if [ -z "$GANETI_INSTANCE_NAME" ]; then
exit 0
fi
INSTANCE=$GANETI_INSTANCE_NAME
echo $GANETI_INSTANCE_NAME | grep -q '\.' 1>/dev/null 2>&1
if [ "$?" -gt 0 ] && [ -z "$FZONE" ]; then
log "Instance $GANETI_INSTANCE_NAME is not FQDN and FZONE not defined! Aborting.."
exit 0
fi
hostname=$(hostname -f)
# Run only in primary node of instance
if [ "$GANETI_INSTANCE_PRIMARY" != "$hostname" ]; then
exit 0
fi
if [ "$AUTHENTICATION_METHOD" == "bind9" -a -e "$KEYFILE" ]; then
log "Will use $KEYFILE keyfile for nsupdate (bind9 method)."
elif [ "$AUTHENTICATION_METHOD" == "kerberos" -a -n "$KERBEROS_PRINCIPAL" ]; then
log "Will use $KERBEROS_PRINCIPAL principal for nsupdate (kerberos method)."
elif [ "$AUTHENTICATION_METHOD" == "plain" ]; then
log "Will use no authentication (plain method)"
else
log "No AUTHENTICATION_METHOD defined or KEYFILE does not exist! Aborting.."
exit 0
fi
# Main starts here
# This runs only for instance modification
if [ "x$GANETI_OP_CODE" = "xOP_INSTANCE_SET_PARAMS" ]; then
query_dns
reset_dns
fi
# If GANETI_INSTANCE_NIC_COUNT is not set then nothing happens
FIRST=0
LAST=$((GANETI_INSTANCE_NIC_COUNT - 1))
for idx in $(seq $FIRST $LAST); do
ip=GANETI_INSTANCE_NIC${idx}_IP
mac=GANETI_INSTANCE_NIC${idx}_MAC
mode=GANETI_INSTANCE_NIC${idx}_MODE
link=GANETI_INSTANCE_NIC${idx}_LINK
subnet=GANETI_INSTANCE_NIC${idx}_NETWORK_SUBNET
subnet6=GANETI_INSTANCE_NIC${idx}_NETWORK_SUBNET6
itags=GANETI_INSTANCE_TAGS
ntags=GANETI_INSTANCE_NIC${idx}_NETWORK_TAGS
eval IP=\$$ip
eval MAC=\$$mac
eval MODE=\$$mode
eval LINK=\$$link
eval TAGS=\$$itags
eval NETWORK_SUBNET=\$$subnet
eval NETWORK_SUBNET6=\$$subnet6
eval NETWORK_TAGS=\$$ntags
# Ability to disable IPv4 or IPv6 per instance
for itag in $TAGS; do
if [ "X$itag" == "Xdisable_ipv6" ]; then
DISABLE_IPV6=1
fi
if [ "X$itag" == "Xdisable_ipv4" ]; then
DISABLE_IPV4=1
fi
done
for tag in $NETWORK_TAGS; do
case $tag in
$DNS_TAG)
# Fill in important variables
get_info
if [ "x$GANETI_OP_CODE" = "xOP_INSTANCE_CREATE" ]; then
update_dns add
elif [ "x$GANETI_OP_CODE" = "xOP_INSTANCE_REMOVE" ]; then
update_dns delete
elif [ "x$GANETI_OP_CODE" = "xOP_INSTANCE_RENAME" ]; then
update_dns delete
# Let's override a variable and add ourselves
INSTANCE=$GANETI_INSTANCE_NEW_NAME
update_dns add
elif [ "x$GANETI_OP_CODE" = "xOP_INSTANCE_SET_PARAMS" ]; then
update_dns add
elif [ "x$GANETI_OP_CODE" = "xOP_INSTANCE_STARTUP" ]; then
update_dns add
elif [ "x$GANETI_OP_CODE" = "xOP_INSTANCE_REBOOT" ]; then
update_dns delete
update_dns add
fi
;;
esac
done
done