DevOps: Puppet, Docker, and Kubernetes

Clustering etcd

etcd stores network information and states in Kubernetes. Any data loss could be crucial. Clustering is strongly recommended in etcd. etcd comes with support for clustering; a cluster of N members can tolerate up to (N-1)/2 failures. There are three mechanisms for creating an etcd cluster. They are as follows:

• Static
• etcd discovery
• DNS discovery

In this recipe, we will discuss how to bootstrap an etcd cluster by static and etcd discovery.

Getting ready

Before you start building an etcd cluster, you have to decide how many members you need. How big the etcd cluster should be really depends on the environment you want to create. In the production environment, at least three members are recommended. Then, the cluster can tolerate at least ...