Recycling CJE 1 Anywhere servers

Article ID:360015997052
2 minute readKnowledge base

Issue

  • I have configured a CJE 1 Anywhere cluster and I want to use one of the servers for another CJE 1 Anywhere cluster.

  • I have configured a CJE 1 Anywhere cluster. I have destroyed the cluster and I want to recreate it again.

  • I want to change the type of worker/controller of one of my nodes.

  • Applications no longer properly provision on a worker and all other troubleshooting steps have been unsuccessful.

Environment

Resolution

When you are creating a cluster with CJE 1, the nodes are automatically created by CJE. In this context all the nodes are VMs that can be destroyed and created from scratch.

In CJE 1 Anywhere if you have a physical server or you don’t want to remove the VM and recreate it you’ll need to follow these steps in order to reuse a node:

  • Perform a backup if you want to reuse the data of the docker images, containers and volumes.

  • Remove the docker images, containers and volumes from your server.

      # Delete all containers
  docker rm $(docker ps -a -q)
  # Delete all images
  docker rmi $(docker images -q)

  • Stop all the services:

    • If on a controller:

       sudo service zookeeper stop
 sudo service mesos-master stop
 sudo service marathon stop
 sudo service docker stop

    • If on a worker:

       sudo service mesos-slave stop
 sudo service docker stop

  • Delete the all the files with the pattern:

      /etc/.*-installed

  • Delete these folders and all the files inside:

      /usr/sbin/mesos-master
  /etc/zookeeper
  /etc/jce
  /etc/mesos
  /etc/mesos-master
  /etc/mesos-slave
  /var/log/router
  /var/log/mesos
  /var/lib/docker
  /var/lib/mesos

Reuse worker with same configuration

If your worker was having issues provisioning applications, or has some other issue that other troubleshooting steps have not fixed, you can re-initialize it with the same configuration. After following the above steps to clean the worker, follow the steps below to re-initialize the worker.

  • Restart all services on worker

      sudo service mesos-slave start
  sudo service docker start

  • Re-initialize the worker dna init worker-<number>

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