CONSUL FORCE LEAVE

Schedule force-leave for unproperly removing "failed" node from consul cluster.

Concepts

• When the nodes from consul members is on "left" state, it's actually still alive and it will eventually rejoin the cluster.
• The force-leave is a method for remove "failed" nodes.
• Consul will try to reconnect the "failed" nodes periodically by the time (default by 72 hours).
• You can't rejoin the "failed" node until you running this force-leave.
• References to consul documentation

Configurations

• Configure / edit your all variable CONSUL_SERVER in all bash script (consul-leave-daily.sh, consul-leave-dday.sh, consul-leave-weekly.sh)

  CONSUL_SERVER="http://DNS-OR-IP-CONSUL-SERVER:8500"
  

  With your consul server address.
• Setup cronjob

  crontab -e
  

• Add last line:

  ## Daily Force Leave every 30 minutes
  */30 * * * * bash /root/consul-leave-dday.sh
  
  ## Daily Force Leave at 1.30pm
  30 1 * * * bash /root/consul-leave-daily.sh
  
  ## Weekly Force Leave at 2.30pm Friday
  30 2 * * 5 bash /root/consul-leave-weekly.sh
  

Notes:

• You can copy crontab.lst to /etc/cron.d/consul-leave for default cronjob.

  sudo cp crontab.lst /etc/cron.d/consul-leave
  

• Logs force-leave will save to /var/log/consul-force-leave

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Running Manual

cd /root
./consul-leave-daily.sh
./consul-leave-dday.sh
./consul-leave-weekly.sh

License

Apache version 2.0