Use-Cases

The move deployment can be used to:

• Link an existing deployment to a new application: for example when you have to rename an application. This is a non trivial operation since the name of the application is used to generate all sorts of stuff like databse names etc.
• Move a deployment from one to another cluster.

How to

Execute this rundeck job.

Original Design Writeup by Jan Veen

We want to support two use cases

• Copy a deployment from prod to staging for test development purposes
• Migrate a deployment from an old cluster to a new one

Source and destination deployment are referred to as old and new one.

Steps

• Stop the old deployment, wait for termination
• Dump all state resources of the deployment
  • postgresql
  • mysql
  • S3
  • volumes
• Start the old deployment
• Delete all state of the old application. This has to happen to avoid naming collisions between the old resource which is owned by the old deployments's sip-manager and the new resource owned by the new deployment's sip-manager
  
• sipctl-deploy the new deployment. set it to 0 replicas. Copy sipsecrets of old deployment into new deployment
  
• (sip-manager will create the new state resources)
• Restore all state of the old deployment in the new deployment's state resources
• Start the new deployment by settings replicas > 0