April 2018
Intermediate to advanced
468 pages
14h 34m
English
Content preview from Mastering Kubernetes - Second Edition
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Clustering etcd
You should have at least three nodes in your etcd cluster. If you need more reliability and redundancy, you can go to five, seven, or any other odd number of nodes. The number of nodes must be odd to have a clear majority in case of a network split.
In order to create a cluster, the etcd nodes should be able to discover each other. There are several methods to accomplish that. I recommend using the excellent etcd-operator from CoreOS:
The operator takes care of many complicated aspects of etcd operation, such as:
- Create and destroy
- Resize
- Failover
- Rolling upgrade
- Backup and restore
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