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#!/bin/bash
# Copyright © 2018 Amdocs
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
debugLog(){
if [ "$enableDebugLogging" == true ]; then
if [ $# -eq 0 ]; then
echo "" >> $LOGFILE
else
echo $( date ) $@ >> $LOGFILE
fi
fi
}
failover(){
lockFile=/tmp/sdnc.failover.lock
# make sure that no failover is currently running
if [ -e ${lockFile} ] && kill -0 $(cat ${lockFile}) 2> /dev/null; then
debugLog "Currently running sdnc and dns failover"
return
fi
trap "rm -f ${lockFile}" INT TERM RETURN
echo $BASHPID > ${lockFile}
# perform takeover
debugLog "Started executing sdnc.failover for $SITE_NAME"
takeoverResult=$( /app/bin/sdnc.failover )
debugLog "Completed executing sdnc.failover. takeoverResult is: $takeoverResult"
if [ "success" = "$takeoverResult" ]; then
# update CoreDNS upon successful execution of sdnc.failover script
debugLog "Executing sdnc.dnsswitch"
/app/bin/sdnc.dnsswitch
rc=$?
debugLog "Completed executing sdnc.dnsswitch for $SITE_NAME. rc=$rc"
else
debugLog "Cluster takeover current status: $takeoverResult on $SITE_NAME."
rc=1
fi
if [ $rc -ne 0 ];then
takeoverResult="failure"
fi
data="{\
\"type\": \"failover\",\
\"status\": \"$takeoverResult\",\
\"site\": \"$SITE_NAME\",\
\"deployment\": \"{{.Values.config.deployment}}\",\
\"timestamp\": \"$(date '+%F %T')\"\
}"
# notifications are best-effort - ignore any failures
curl -H "Content-Type: application/json" -X POST --data "$data" http://$message_router/events/$topic >/dev/null 2>&1
}
LOGFILE="/app/geo.log"
enableDebugLogging=true
message_router=message-router:3904
topic={{.Values.config.messageRouterTopic}}
SITE_NAME="sdnc01"
if [ "$SDNC_IS_PRIMARY_CLUSTER" = "false" ];then
SITE_NAME="sdnc02"
fi
debugLog
debugLog "Executing ensureSdncActive"
# query SDN-C cluster status
debugLog "Started executing sdnc.cluster"
clusterStatus=$( /app/bin/sdnc.cluster )
debugLog "Completed executing sdnc.cluster. Cluster status is: $clusterStatus"
if [ "active" = "$clusterStatus" ]; then
# peform health-check
debugLog "Started excuting sdnc.monitor"
health=$( /app/bin/sdnc.monitor )
debugLog "Completed executing sdnc.monitor. Cluster is: $health"
if [ "healthy" = "$health" ]; then
# Cluster is ACTIVE and HEALTHY
exit 0
fi
exit 1
elif [ "standby" = "$clusterStatus" ]; then
# Run failover in background process and allow PROM to continue
( failover & )
exit 0
fi
# Unknown cluster status
exit 1
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