tidb集群添加新的tidb节点

栏目: 数据库 · 发布时间: 6年前

内容简介：参考文档：参考文档：TIDB官方文档手册：

参考文档： https://www.pingcap.com/docs-cn/QUICKSTART/#tidb-%e9%9b%86%e7%be%a4%e6%89%a9%e5%ae%b9%e7%bc%a9%e5%ae%b9%e6%96%b9%e6%a1%88

参考文档： https://pingcap.com/docs-cn/op-guide/ansible-deployment-scale/

TIDB官方文档手册： https://www.pingcap.com/docs-cn/ ，当前操作tidb集群版本是v2.1

1、准备机器

已经部署了tidb集群，部署过程见以前的博客文章，运行一段时间后，qps到达瓶颈，查了下问题出在tidb性能到瓶颈，需要扩容tidb节点。

在已有的新节点上，扩容tidb节点，服务器新购买，所以需要一些统一标准，特别是初始化的配置，以及安装环境准备等等。

准备资源配置文件cleric_add.ini

hy3-tidb-[3:4].csdn.com

在ansible上面安装tidb账号，在csdndbtls上安装（这是一台能连通所有tidb节点的服务器）

ansible -i cleric_add.ini all -m shell -a "useradd tidb" -b

准备公钥

scp hy3-tipd-1.csdn.com:/tmp/id_rsa.pub .

1.2 建立tidb互通免秘钥

准备好sudo.txt

%tidb ALL=(ALL) ALL

%tidb ALL=(ALL) NOPASSWD: ALL

在csdndbtls操作（这是一台能通所有tidb集群节点的中间服务器），让tidb能sudo到管理员进行各种安装操作

在csdndbtls上面

cd /home/ansible/csdnhs/sms

ansible -i cleric_add.ini all -m copy -a "src=sudo.txt dest=/tmp/sudoers.1 mode=0644" -uansible -b

ansible -i cleric_add.ini all -m shell -a "cat /tmp/sudoers.1 >> /etc/sudoers" -uansible -b

设置tidb互通

将中控机的tidb的公钥copy到csdndbtls上面，在csdndbtls上操作

ansible -i cleric_add.ini all -m copy -a "src=id_rsa.pub dest=/tmp/id_rsa.pub.1" -b

ansible -i cleric_add.ini all -m shell -a "mkdir -p /home/tidb/.ssh/" -b

ansible -i cleric_add.ini all -m shell -a "chown -R tidb.tidb /home/tidb" -b

ansible -i cleric_add.ini all -m shell -a "cat /tmp/id_rsa.pub.1 >> /home/tidb/.ssh/authorized_keys" -b

ansible -i cleric_add.ini all -m shell -a "chmod 600 /home/tidb/.ssh/authorized_keys" -b

ansible -i cleric_add.ini all -m shell -a "chown -R tidb.tidb /home/tidb" -b

ansible -i cleric_add.ini all -m shell -a "chown -R tidb.tidb /data0" -b

设置后，试下：

执行过程：
[tidb@hy3-tidb-pd-1] ~$ ssh hy3-tidb-3.csdn.com The authenticity of host 'hy3-tidb-3.csdn.com (172.20.96.167)' can't be established. ECDSA key fingerprint is 22:49:b2:5c:7c:8f:73:56:89:29:8a:bd:56:49:74:66. Are you sure you want to continue connecting (yes/no)? yes Warning: Permanently added 'hy3-tidb-3.csdn.com,172.20.96.167' (ECDSA) to the list of known hosts. [tidb@hy3-tidb-3] ~$ exit logout Connection to hy3-tidb-3.csdn.com closed. [tidb@hy3-tidb-pd-1] ~$ ssh hy3-tidb-4.csdn.com The authenticity of host 'hy3-tidb-4.csdn.com (172.20.98.161)' can't be established. ECDSA key fingerprint is 22:49:b2:5c:7c:8f:73:56:89:29:8a:bd:56:49:74:66. Are you sure you want to continue connecting (yes/no)? yes Warning: Permanently added 'hy3-tidb-4.csdn.com,172.20.98.161' (ECDSA) to the list of known hosts. [tidb@hy3-tidb-4] ~$ exit

执行过程：

[tidb@hy3-tidb-pd-1] ~$ ssh hy3-tidb-3.csdn.com

The authenticity of host 'hy3-tidb-3.csdn.com (172.20.96.167)' can't be established.

ECDSA key fingerprint is 22:49:b2:5c:7c:8f:73:56:89:29:8a:bd:56:49:74:66.

Are you sure you want to continue connecting (yes/no)? yes

Warning: Permanently added 'hy3-tidb-3.csdn.com,172.20.96.167' (ECDSA) to the list of known hosts.

[tidb@hy3-tidb-3] ~$ exit

logout

Connection to hy3-tidb-3.csdn.com closed.

[tidb@hy3-tidb-pd-1] ~$ ssh hy3-tidb-4.csdn.com

The authenticity of host 'hy3-tidb-4.csdn.com (172.20.98.161)' can't be established.

ECDSA key fingerprint is 22:49:b2:5c:7c:8f:73:56:89:29:8a:bd:56:49:74:66.

Are you sure you want to continue connecting (yes/no)? yes

Warning: Permanently added 'hy3-tidb-4.csdn.com,172.20.98.161' (ECDSA) to the list of known hosts.

[tidb@hy3-tidb-4] ~$ exit

在csdndbtls上安装ntp服务

安装：ansible -i cleric_add.ini all -m shell -a "sudo yum install ntp ntpdate -y" -b

启动：ansible -i cleric_add.ini all -m shell -a "sudo systemctl start ntpd.service " -b

准备，生成h.txt，上面ansible命令的时候，会有所有的tidb节点域名地址日志信息，copy到1.log，然后 more 1.log |grep hy3 |awk '{print $1}' |sort >> h.txt 就生成了域名的文件，之后再

因为就2个节点，所以下面的办法没有用到：

[ansible@csdndbtls] ~/csdnhs/tidb$ more 1.log |grep hy3 |awk '{print $1}' |sort >> h.txt

[ansible@csdndbtls] ~/csdnhs/tidb$ more h.txt

hy3-tidb-3.csdn.com

hy3-tidb-4.csdn.com

[ansible@csdndbtls] ~/csdnhs/tidb$ more h.txt

hy3-tidb-3.csdn.com

hy3-tidb-4.csdn.com

[ansible@csdndbtls] ~/csdnhs/tidb$ for h in `cat h.txt`;do echo `nslookup $h |grep 'Address: 10' |sed 's/Address: //'` $h;done

172.10.66.118 hy3-tidb-3.csdn.com

172.10.167.52 hy3-tidb-4.csdn.com

[ansible@csdndbtls] ~/csdnhs/tidb$

2、开始部署

先去vim inventory.ini添加2个新节点

[tidb_servers]

172.10.66.118

172.10.167.52

[monitored_servers]

172.10.66.118

172.10.167.52

这个就是改一些参数和建目录

初始化新增节点：

ansible-playbook bootstrap.yml -l 172.10.66.118,172.10.167.52

部署新增节点：

ansible-playbook deploy.yml -l 172.10.66.118,172.10.167.52

启动新节点服务：

ansible-playbook start.yml -l 172.10.66.118,172.10.167.52

更新 Prometheus 配置并重启：

ansible-playbook rolling_update_monitor.yml --tags=prometheus

测试使用新的tidb节点登陆，成功，如下：

[csdnhy@hy1st] ~$ mysql -h 172.10.66.118 -uroot -p -P4000 hy3lt

Enter password:

Welcome to the MySQL monitor. Commands end with ; or \g.

Your MySQL connection id is 9

Server version: 5.7.10-TiDB-v2.0.0-rc.4-214-g7fbbb1f MySQL Community Server (Apache License 2.0)

Oracle is a registered trademark of Oracle Corporation and/or its

affiliates. Other names may be trademarks of their respective

owners.

Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.

root-172.10.66.118:4000:hy3lt 22:03:11>

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