https://blog.csdn.net/mchdba/article/details/108896766

环境：centos7、tidb4.0.4、tiup-v1.0.8

添加两个tikv节点  172.21.210.37-38

思路：初始化两台服务器、配置ssh互通——>编辑配置文件——>执行扩容命令——>重启grafana

1、初始化服务器、配置ssh互通

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1、时间同步
2、配置ssh
ssh-copy-id root@172.21.210.37
ssh-copy-id root@172.21.210.38

2、编辑配置文件

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tiup cluster list                                     #查看当前的集群名称列表
tiup cluster edit-config <cluster-name>  #查看集群配置、拷贝对应的配置
 
vi scale-out.yaml
tikv_servers:
- host: 172.21.210.37
  ssh_port: 22
  port: 20160
  status_port: 20180
  deploy_dir: /data1/tidb-deploy/tikv-20160
  data_dir: /data1/tidb-data/tikv-20160
  arch: amd64
  os: linux
- host: 172.21.210.38
  ssh_port: 22
  port: 20160
  status_port: 20180
  deploy_dir: /data1/tidb-deploy/tikv-20160
  data_dir: /data1/tidb-data/tikv-20160
  arch: amd64
  os: linux

3、执行扩容命令

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此处假设当前执行命令的用户和新增的机器打通了互信，如果不满足已打通互信的条件，需要通过 -p 来输入新机器的密码，或通过 -i 指定私钥文件。
tiup cluster scale-out <cluster-name> scale-out.yaml
预期输出 Scaled cluster <cluster-name> out successfully 信息，表示扩容操作成功
 
root@host-172-21-210-32 tidb_config]# tiup cluster scale-out tidb scale-out.yaml
Starting component `cluster`:  scale-out tidb scale-out.yaml
Please confirm your topology:
TiDB Cluster: tidb
TiDB Version: v4.0.4
Type  Host           Ports        OS/Arch       Directories
----  ----           -----        -------       -----------
tikv  172.21.210.37  20160/20180  linux/x86_64  /data1/tidb-deploy/tikv-20160,/data1/tidb-data/tikv-20160
tikv  172.21.210.38  20160/20180  linux/x86_64  /data1/tidb-deploy/tikv-20160,/data1/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]:  y
+ [ Serial ] - SSHKeySet: privateKey=/root/.tiup/storage/cluster/clusters/tidb/ssh/id_rsa, publicKey=/root/.tiup/storage/cluster/clusters/tidb/ssh/id_rsa.pub
 
 
  - Download tikv:v4.0.4 (linux/amd64) ... Done
+ [ Serial ] - RootSSH: user=root, host=172.21.210.38, port=22, key=/root/.ssh/id_rsa
+ [ Serial ] - EnvInit: user=tidb, host=172.21.210.38
+ [ Serial ] - RootSSH: user=root, host=172.21.210.37, port=22, key=/root/.ssh/id_rsa
+ [ Serial ] - EnvInit: user=tidb, host=172.21.210.37
+ [ Serial ] - Mkdir: host=172.21.210.37, directories='/data1/tidb-deploy','/data1/tidb-data'
+ [ Serial ] - Mkdir: host=172.21.210.38, directories='/data1/tidb-deploy','/data1/tidb-data'
+ [Parallel] - UserSSH: user=tidb, host=172.21.210.32
+ [Parallel] - UserSSH: user=tidb, host=172.21.210.39
+ [Parallel] - UserSSH: user=tidb, host=172.21.210.33
+ [Parallel] - UserSSH: user=tidb, host=172.21.210.34
+ [Parallel] - UserSSH: user=tidb, host=172.21.210.32
+ [Parallel] - UserSSH: user=tidb, host=172.21.210.33
+ [Parallel] - UserSSH: user=tidb, host=172.21.210.35
+ [Parallel] - UserSSH: user=tidb, host=172.21.210.32
+ [Parallel] - UserSSH: user=tidb, host=172.21.210.36
+ [Parallel] - UserSSH: user=tidb, host=172.21.210.32
+ [Parallel] - UserSSH: user=tidb, host=172.21.210.32
+ [ Serial ] - UserSSH: user=tidb, host=172.21.210.38
 
+ [ Serial ] - UserSSH: user=tidb, host=172.21.210.37
+ [ Serial ] - Mkdir: host=172.21.210.38, directories='/data1/tidb-deploy/tikv-20160','/data1/tidb-deploy/tikv-20160/log','/data1/tidb-deploy/tikv-20160/bin','/data1/tidb-deploy/tikv-20160/conf','/data1/tidb-deploy/tikv-20160/scripts'
+ [ Serial ] - Mkdir: host=172.21.210.37, directories='/data1/tidb-deploy/tikv-20160','/data1/tidb-deploy/tikv-20160/log','/data1/tidb-deploy/tikv-20160/bin','/data1/tidb-deploy/tikv-20160/conf','/data1/tidb-deploy/tikv-20160/scripts'
 
 
  - Copy blackbox_exporter -> 172.21.210.37 ... ? Mkdir: host=172.21.210.37, directories='/data1/tidb-deploy/monitor-9100','/data1/t...
  - Copy blackbox_exporter -> 172.21.210.37 ... ? Mkdir: host=172.21.210.37, directories='/data1/tidb-deploy/monitor-9100','/data1/t...
  - Copy node_exporter -> 172.21.210.37 ... ? CopyComponent: component=node_exporter, version=v0.17.0, remote=172.21.210.37:/data1/t...
  - Copy blackbox_exporter -> 172.21.210.37 ... ? MonitoredConfig: cluster=tidb, user=tidb, node_exporter_port=9100, blackbox_export...
  - Copy node_exporter -> 172.21.210.38 ... Done
+ [ Serial ] - ScaleConfig: cluster=tidb, user=tidb, host=172.21.210.37, service=tikv-20160.service, deploy_dir=/data1/tidb-deploy/tikv-20160, data_dir=[/data1/tidb-data/tikv-20160], log_dir=/data1/tidb-deploy/tikv-20160/log, cache_dir=
+ [ Serial ] - ScaleConfig: cluster=tidb, user=tidb, host=172.21.210.38, service=tikv-20160.service, deploy_dir=/data1/tidb-deploy/tikv-20160, data_dir=[/data1/tidb-data/tikv-20160], log_dir=/data1/tidb-deploy/tikv-20160/log, cache_dir=
+ [ Serial ] - ClusterOperate: operation=StartOperation, options={Roles:[] Nodes:[] Force:false SSHTimeout:0 OptTimeout:120 APITimeout:0 IgnoreConfigCheck:false RetainDataRoles:[] RetainDataNodes:[]}
Starting component pd
        Starting instance pd 172.21.210.33:2379
        Starting instance pd 172.21.210.32:2379
        Start pd 172.21.210.33:2379 success
        Start pd 172.21.210.32:2379 success
Starting component node_exporter
        Starting instance 172.21.210.32
        Start 172.21.210.32 success
Starting component blackbox_exporter
        Starting instance 172.21.210.32
        Start 172.21.210.32 success
Starting component node_exporter
        Starting instance 172.21.210.33
        Start 172.21.210.33 success
Starting component blackbox_exporter
        Starting instance 172.21.210.33
        Start 172.21.210.33 success
Starting component tikv
        Starting instance tikv 172.21.210.35:20160
        Starting instance tikv 172.21.210.34:20160
        Starting instance tikv 172.21.210.39:20160
        Starting instance tikv 172.21.210.36:20160
        Start tikv 172.21.210.39:20160 success
        Start tikv 172.21.210.34:20160 success
        Start tikv 172.21.210.35:20160 success
        Start tikv 172.21.210.36:20160 success
Starting component node_exporter
        Starting instance 172.21.210.35
        Start 172.21.210.35 success
Starting component blackbox_exporter
        Starting instance 172.21.210.35
        Start 172.21.210.35 success
Starting component node_exporter
        Starting instance 172.21.210.34
        Start 172.21.210.34 success
Starting component blackbox_exporter
        Starting instance 172.21.210.34
        Start 172.21.210.34 success
Starting component node_exporter
        Starting instance 172.21.210.39
        Start 172.21.210.39 success
Starting component blackbox_exporter
        Starting instance 172.21.210.39
        Start 172.21.210.39 success
Starting component node_exporter
        Starting instance 172.21.210.36
        Start 172.21.210.36 success
Starting component blackbox_exporter
        Starting instance 172.21.210.36
        Start 172.21.210.36 success
Starting component tidb
        Starting instance tidb 172.21.210.33:4000
        Starting instance tidb 172.21.210.32:4000
        Start tidb 172.21.210.32:4000 success
        Start tidb 172.21.210.33:4000 success
Starting component prometheus
        Starting instance prometheus 172.21.210.32:9090
        Start prometheus 172.21.210.32:9090 success
Starting component grafana
        Starting instance grafana 172.21.210.32:3000
        Start grafana 172.21.210.32:3000 success
Starting component alertmanager
        Starting instance alertmanager 172.21.210.32:9093
        Start alertmanager 172.21.210.32:9093 success
Checking service state of pd
        172.21.210.32      Active: active (running) since Fri 2020-10-16 22:50:31 CST; 2 weeks 5 days ago
        172.21.210.33      Active: active (running) since Fri 2020-10-16 22:50:22 CST; 2 weeks 5 days ago
Checking service state of tikv
        172.21.210.34      Active: active (running) since Fri 2020-10-16 22:50:19 CST; 2 weeks 5 days ago
        172.21.210.35      Active: active (running) since Fri 2020-10-16 22:50:19 CST; 2 weeks 5 days ago
        172.21.210.36      Active: active (running) since Sat 2020-10-17 02:25:23 CST; 2 weeks 5 days ago
        172.21.210.39      Active: active (running) since Fri 2020-10-16 23:34:13 CST; 2 weeks 5 days ago
Checking service state of tidb
        172.21.210.32      Active: active (running) since Fri 2020-10-16 22:50:49 CST; 2 weeks 5 days ago
        172.21.210.33      Active: active (running) since Fri 2020-10-16 22:50:40 CST; 2 weeks 5 days ago
Checking service state of prometheus
        172.21.210.32      Active: active (running) since Sat 2020-10-17 02:25:27 CST; 2 weeks 5 days ago
Checking service state of grafana
        172.21.210.32      Active: active (running) since Fri 2020-10-16 23:55:07 CST; 2 weeks 5 days ago
Checking service state of alertmanager
        172.21.210.32      Active: active (running) since Fri 2020-10-16 22:51:06 CST; 2 weeks 5 days ago
+ [Parallel] - UserSSH: user=tidb, host=172.21.210.38
+ [Parallel] - UserSSH: user=tidb, host=172.21.210.37
+ [ Serial ] - save meta
+ [ Serial ] - ClusterOperate: operation=StartOperation, options={Roles:[] Nodes:[] Force:false SSHTimeout:0 OptTimeout:120 APITimeout:0 IgnoreConfigCheck:false RetainDataRoles:[] RetainDataNodes:[]}
Starting component tikv
        Starting instance tikv 172.21.210.38:20160
        Starting instance tikv 172.21.210.37:20160
        Start tikv 172.21.210.37:20160 success
        Start tikv 172.21.210.38:20160 success
Starting component node_exporter
        Starting instance 172.21.210.37
        Start 172.21.210.37 success
Starting component blackbox_exporter
        Starting instance 172.21.210.37
        Start 172.21.210.37 success
Starting component node_exporter
        Starting instance 172.21.210.38
        Start 172.21.210.38 success
Starting component blackbox_exporter
        Starting instance 172.21.210.38
        Start 172.21.210.38 success
Checking service state of tikv
        172.21.210.37      Active: active (running) since Thu 2020-11-05 11:33:46 CST; 3s ago
        172.21.210.38      Active: active (running) since Thu 2020-11-05 11:33:46 CST; 2s ago
+ [ Serial ] - InitConfig: cluster=tidb, user=tidb, host=172.21.210.32, path=/root/.tiup/storage/cluster/clusters/tidb/config-cache/alertmanager-9093.service, deploy_dir=/data1/tidb-deploy/alertmanager-9093, data_dir=[/data1/tidb-data/alertmanager-9093], log_dir=/data1/tidb-deploy/alertmanager-9093/log, cache_dir=/root/.tiup/storage/cluster/clusters/tidb/config-cache
+ [ Serial ] - InitConfig: cluster=tidb, user=tidb, host=172.21.210.36, path=/root/.tiup/storage/cluster/clusters/tidb/config-cache/tikv-20160.service, deploy_dir=/data1/tidb-deploy/tikv-20160, data_dir=[/data1/tidb-data/tikv-20160], log_dir=/data1/tidb-deploy/tikv-20160/log, cache_dir=/root/.tiup/storage/cluster/clusters/tidb/config-cache
+ [ Serial ] - InitConfig: cluster=tidb, user=tidb, host=172.21.210.32, path=/root/.tiup/storage/cluster/clusters/tidb/config-cache/tidb-4000.service, deploy_dir=/data1/tidb-deploy/tidb-4000, data_dir=[], log_dir=/data1/tidb-deploy/tidb-4000/log, cache_dir=/root/.tiup/storage/cluster/clusters/tidb/config-cache
+ [ Serial ] - InitConfig: cluster=tidb, user=tidb, host=172.21.210.32, path=/root/.tiup/storage/cluster/clusters/tidb/config-cache/pd-2379.service, deploy_dir=/data1/tidb-deploy/pd-2379, data_dir=[/data1/tidb-data/pd-2379], log_dir=/data1/tidb-deploy/pd-2379/log, cache_dir=/root/.tiup/storage/cluster/clusters/tidb/config-cache
+ [ Serial ] - InitConfig: cluster=tidb, user=tidb, host=172.21.210.37, path=/root/.tiup/storage/cluster/clusters/tidb/config-cache/tikv-20160.service, deploy_dir=/data1/tidb-deploy/tikv-20160, data_dir=[/data1/tidb-data/tikv-20160], log_dir=/data1/tidb-deploy/tikv-20160/log, cache_dir=/root/.tiup/storage/cluster/clusters/tidb/config-cache
+ [ Serial ] - InitConfig: cluster=tidb, user=tidb, host=172.21.210.33, path=/root/.tiup/storage/cluster/clusters/tidb/config-cache/tidb-4000.service, deploy_dir=/data1/tidb-deploy/tidb-4000, data_dir=[], log_dir=/data1/tidb-deploy/tidb-4000/log, cache_dir=/root/.tiup/storage/cluster/clusters/tidb/config-cache
+ [ Serial ] - InitConfig: cluster=tidb, user=tidb, host=172.21.210.35, path=/root/.tiup/storage/cluster/clusters/tidb/config-cache/tikv-20160.service, deploy_dir=/data1/tidb-deploy/tikv-20160, data_dir=[/data1/tidb-data/tikv-20160], log_dir=/data1/tidb-deploy/tikv-20160/log, cache_dir=/root/.tiup/storage/cluster/clusters/tidb/config-cache
+ [ Serial ] - InitConfig: cluster=tidb, user=tidb, host=172.21.210.32, path=/root/.tiup/storage/cluster/clusters/tidb/config-cache/prometheus-9090.service, deploy_dir=/data1/tidb-deploy/prometheus-9090, data_dir=[/data1/tidb-data/prometheus-9090], log_dir=/data1/tidb-deploy/prometheus-9090/log, cache_dir=/root/.tiup/storage/cluster/clusters/tidb/config-cache
+ [ Serial ] - InitConfig: cluster=tidb, user=tidb, host=172.21.210.34, path=/root/.tiup/storage/cluster/clusters/tidb/config-cache/tikv-20160.service, deploy_dir=/data1/tidb-deploy/tikv-20160, data_dir=[/data1/tidb-data/tikv-20160], log_dir=/data1/tidb-deploy/tikv-20160/log, cache_dir=/root/.tiup/storage/cluster/clusters/tidb/config-cache
+ [ Serial ] - InitConfig: cluster=tidb, user=tidb, host=172.21.210.32, path=/root/.tiup/storage/cluster/clusters/tidb/config-cache/grafana-3000.service, deploy_dir=/data1/tidb-deploy/grafana-3000, data_dir=[], log_dir=/data1/tidb-deploy/grafana-3000/log, cache_dir=/root/.tiup/storage/cluster/clusters/tidb/config-cache
+ [ Serial ] - InitConfig: cluster=tidb, user=tidb, host=172.21.210.38, path=/root/.tiup/storage/cluster/clusters/tidb/config-cache/tikv-20160.service, deploy_dir=/data1/tidb-deploy/tikv-20160, data_dir=[/data1/tidb-data/tikv-20160], log_dir=/data1/tidb-deploy/tikv-20160/log, cache_dir=/root/.tiup/storage/cluster/clusters/tidb/config-cache
+ [ Serial ] - InitConfig: cluster=tidb, user=tidb, host=172.21.210.33, path=/root/.tiup/storage/cluster/clusters/tidb/config-cache/pd-2379.service, deploy_dir=/data1/tidb-deploy/pd-2379, data_dir=[/data1/tidb-data/pd-2379], log_dir=/data1/tidb-deploy/pd-2379/log, cache_dir=/root/.tiup/storage/cluster/clusters/tidb/config-cache
+ [ Serial ] - InitConfig: cluster=tidb, user=tidb, host=172.21.210.39, path=/root/.tiup/storage/cluster/clusters/tidb/config-cache/tikv-20160.service, deploy_dir=/data1/tidb-deploy/tikv-20160, data_dir=[/data1/tidb-data/tikv-20160], log_dir=/data1/tidb-deploy/tikv-20160/log, cache_dir=/root/.tiup/storage/cluster/clusters/tidb/config-cache
+ [ Serial ] - ClusterOperate: operation=RestartOperation, options={Roles:[prometheus] Nodes:[] Force:false SSHTimeout:0 OptTimeout:120 APITimeout:0 IgnoreConfigCheck:false RetainDataRoles:[] RetainDataNodes:[]}
Stopping component prometheus
        Stopping instance 172.21.210.32
        Stop prometheus 172.21.210.32:9090 success
Starting component prometheus
        Starting instance prometheus 172.21.210.32:9090
        Start prometheus 172.21.210.32:9090 success
Starting component node_exporter
        Starting instance 172.21.210.32
        Start 172.21.210.32 success
Starting component blackbox_exporter
        Starting instance 172.21.210.32
        Start 172.21.210.32 success
Checking service state of pd
        172.21.210.33      Active: active (running) since Fri 2020-10-16 22:50:22 CST; 2 weeks 5 days ago
        172.21.210.32      Active: active (running) since Fri 2020-10-16 22:50:31 CST; 2 weeks 5 days ago
Checking service state of tikv
        172.21.210.35      Active: active (running) since Fri 2020-10-16 22:50:19 CST; 2 weeks 5 days ago
        172.21.210.39      Active: active (running) since Fri 2020-10-16 23:34:13 CST; 2 weeks 5 days ago
        172.21.210.34      Active: active (running) since Fri 2020-10-16 22:50:19 CST; 2 weeks 5 days ago
        172.21.210.36      Active: active (running) since Sat 2020-10-17 02:25:23 CST; 2 weeks 5 days ago
Checking service state of tidb
        172.21.210.32      Active: active (running) since Fri 2020-10-16 22:50:49 CST; 2 weeks 5 days ago
        172.21.210.33      Active: active (running) since Fri 2020-10-16 22:50:40 CST; 2 weeks 5 days ago
Checking service state of prometheus
        172.21.210.32      Active: active (running) since Thu 2020-11-05 11:33:53 CST; 2s ago
Checking service state of grafana
        172.21.210.32      Active: active (running) since Fri 2020-10-16 23:55:07 CST; 2 weeks 5 days ago
Checking service state of alertmanager
        172.21.210.32      Active: active (running) since Fri 2020-10-16 22:51:06 CST; 2 weeks 5 days ago
+ [ Serial ] - UpdateTopology: cluster=tidb
Scaled cluster `tidb` out successfully

4、查看集群状态、重启grafana

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检查集群状态
    tiup cluster display <cluster-name>
重启grafana
    tiup cluster restart tidb -R grafana

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