TiKv扩容_ksg变压器

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TiDB是无状态的，所以各节点可以水平扩缩容；扩容期间不会影响集群的读写，整个过程在线； Tidb、tikv、pd扩容方式都是一致的； tiflash有所区别

开始前准备一台服务器，这里以TiKV为例，配置好免密；

一、编辑配置文件

tikv_servers:
- host: x.x.x.x
  ssh_port: 22
  port: 20160
  status_port: 20180
  deploy_dir: /export/servers/TiDB/soft/tikv-20160
  data_dir: /export/servers/TiDB/data/tikv-20160
  log_dir: /export/servers/TiDB/soft/tikv-20160/log

二、开始扩容：

tiup cluster scale-out cluster-default scale-out-tikv.yaml

tikv-20160/log
[root@A02-R05-I45-170-J33FE0D TiDB]# tiup cluster scale-out cluster-default scale-out-tikv.yaml
Starting component `cluster`: /root/.tiup/components/cluster/v1.7.0/tiup-cluster scale-out cluster-default scale-out-tikv.yaml

+ Detect CPU Arch
  - Detecting node 11.127.32.8 ... Done
Please confirm your topology:
Cluster type:    tidb
Cluster name:    cluster-default
Cluster version: v5.3.0
Role  Host         Ports        OS/Arch       Directories
----  ----         -----        -------       -----------
tikv  11.127.32.8  20160/20180  linux/x86_64  /export/servers/TiDB/soft/tikv-20160,/export/servers/TiDB/data/tikv-20160
Attention:
    1. If the topology is not what you expected, check your yaml file.
    2. Please confirm there is no port/directory conflicts in same host.
Do you want to continue? [y/N]: (default=N) y
+ [ Serial ] - SSHKeySet: privateKey=/root/.tiup/storage/cluster/clusters/cluster-default/ssh/id_rsa, publicKey=/root/.tiup/storage/cluster/clusters/cluster-default/ssh/id_rsa.pub
...
Scaled cluster `cluster-default` out successfully

扩容成功后，日志最后会显示： Scaled cluster `cluster-default` out successfully 

三、 查看集群，确认节点是否加入

tiup cluster display cluster-default