consul watch で利用する監視スクリプト

consul-check.sh

#!/bin/sh

TAG_LEADER_ID=`aws --region ap-northeast-1 ec2 describe-instances --query 'Reservations[].Instances[].InstanceId' --output text --filter 'Name=tag:consul-leader,Values=true'`
CUR_LEADER_IP=`curl -s -X GET http://localhost:8500/v1/status/leader | sed 's/\:8300//g'`
CUR_LEADER_ID=`aws --region ap-northeast-1 ec2 describe-instances --query 'Reservations[].Instances[].InstanceId' --output text --filter "Name=private-ip-address,Values=${CUR_LEADER_IP}"`

#echo $TAG_LEADER_ID
#echo $CUR_LEADER_IP
#echo $CUR_LEADER_ID

if [ $TAG_LEADER_ID = $CUR_LEADER_ID ];then
  logger -t consul-watcher "consul leader node $TAG_LEADER_ID = $CUR_LEADER_ID"
else
  logger -t consul-watcher "update tag to $CUR_LEADER_ID"
  aws --region ap-northeast-1 ec2 create-tags --resources ${TAG_LEADER_ID} --tags Key=consul-leader,Value=
  aws --region ap-northeast-1 ec2 create-tags --resources ${CUR_LEADER_ID} --tags Key=consul-leader,Value=true
fi

とりあえずやっつけスクリプト。