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Migrating an OpenShift etcd Cluster
source link: https://zwischenzugs.com/2017/03/04/migrating-an-openshift-etcd-cluster/
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Summary
Following on from my previous post setting up an OpenShift cluster in Vagrant, this post discusses migrating an etcd cluster within a live OpenShift instance to newer servers.
Moving a standalone etcd cluster is relatively straightforward, but when it’s part of an OpenShift cluster — and especially one that’s live and operational — it is a little more involved.
The ordering of actions is important and there are several aspects to consider when planning such a move:
- Config management preparation
- Stopping the cluster
- Creation and distribution of certificates
- Data migration
- Update of OpenShift config
- Update of config management
Here we are using Ansible to provision and maintain the environment.
You can also use Chef to manage your OpenShift cluster.
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