document alpha etcd3 support

[chrislovecnm]

/assign @gambol99
@gambol99 provided a correct example

[gambol99]

Hi @chrislovecnm ... near enough :-) I've taken the following snippets from our prod cluster.yaml. Both events and main must have version and tls enabled and yes the kube apiserver storage is handled for the user. I'll raise a PR this weekend with proper docs

  etcdClusters:
  - etcdMembers:
    - encryptedVolume: true
      instanceGroup: master0-az0
      name: a-1 
    - encryptedVolume: true
      instanceGroup: master1-az0
      name: a-2 
    - encryptedVolume: true
      instanceGroup: master2-az0
      name: a-3 
    - encryptedVolume: true
      instanceGroup: master0-az1
      name: b-1 
    - encryptedVolume: true
      instanceGroup: master1-az1
      name: b-2 
    enableEtcdTLS: true
    name: main
    version: 3.0.17
  - etcdMembers:
    - encryptedVolume: true
      instanceGroup: master0-az0
      name: a-1 
    - encryptedVolume: true
      instanceGroup: master1-az0
      name: a-2 
    - encryptedVolume: true
      instanceGroup: master2-az0
      name: a-3 
    - encryptedVolume: true
      instanceGroup: master0-az1
      name: b-1 
    - encryptedVolume: true
      instanceGroup: master1-az1
      name: b-2 
    enableEtcdTLS: true
    name: events
    version: 3.0.17

[KashifSaadat]

PR: #3514

[chrislovecnm]

Closing

[ghost]

is there a way to reduce or control the size of these volumes??