tidb叢集新增新的tidb節點
參考文件：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" rel="nofollow,noindex" target="_blank">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
參考文件：https://pingcap.com/docs-cn/op-guide/ansible-deployment-scale/
TIDB官方文件手冊：https://www.pingcap.com/docs-cn/ ，當前操作tidb叢集版本是v2.1
1、準備機器
已經部署了tidb叢集，部署過程見以前的部落格文章，執行一段時間後，qps到達瓶頸，查了下問題出在tidb效能到瓶頸，需要擴容tidb節點。
在已有的新節點上，擴容tidb節點，伺服器新購買，所以需要一些統一標準，特別是初始化的配置，以及安裝環境準備等等。
準備資源配置檔案cleric_add.ini
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hy3-tidb-[3:4].csdn.com |
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在ansible上面安裝tidb賬號，在csdndbtls上安裝（這是一臺能連通所有tidb節點的伺服器）
| ansible -i cleric_add.ini all -m shell -a "useradd tidb" -b |
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準備公鑰
scp hy3-tipd-1.csdn.com:/tmp/id_rsa.pub .
1.2 建立tidb互通免祕鑰
準備好sudo.txt
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%tidb ALL=(ALL) ALL %tidb ALL=(ALL) NOPASSWD: ALL |
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在csdndbtls操作（這是一臺能通所有tidb叢集節點的中間伺服器），讓tidb能sudo到管理員進行各種安裝操作
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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 |
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設定tidb互通
將中控機的tidb的公鑰copy到csdndbtls上面，在csdndbtls上操作
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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 |
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設定後，試下：
| 執行過程： |
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[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上安裝ntp服務
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安裝：ansible -i cleric_add.ini all -m shell -a "sudo yum install ntp ntpdate -y" -b 啟動：ansible -i cleric_add.ini all -m shell -a "sudo systemctl start ntpd.service " -b |
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準備，生成h.txt，上面ansible命令的時候，會有所有的tidb節點域名地址日誌資訊，copy到1.log，然後 more 1.log |grep hy3 |awk '{print $1}' |sort >> h.txt 就生成了域名的檔案，之後再
[ansible@csdndbtls] ~/csdnhs/tidb$ 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: //'` $h;done 172.10.66.118 hy3-tidb-3.csdn.com 172.10.167.52 hy3-tidb-4.csdn.com [ansible@csdndbtls] ~/csdnhs/tidb$ |
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2、開始部署
先去vim inventory.ini新增2個新節點
[tidb_servers]
172.10.66.118
172.10.167.52
[monitored_servers]
172.10.66.118
172.10.167.52
這個就是改一些引數和建目錄
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初始化新增節點：
ansible-playbook bootstrap.yml -l 172.10.66.118,172.10.167.52
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部署新增節點：
ansible-playbook deploy.yml -l 172.10.66.118,172.10.167.52
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啟動新節點服務：
ansible-playbook start.yml -l 172.10.66.118,172.10.167.52
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更新 Prometheus 配置並重啟：
ansible-playbook rolling_update_monitor.yml --tags=prometheus
測試使用新的tidb節點登陸，成功，如下：
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[csdnhy@hy1st] ~$ mysql -h 172.10.66.118 -uroot -p -P4000 hy3lt Enter password: Welcome to the SQL/">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) Copyright (c) 2000, 2017, Oracle and/or its affiliates. All rights reserved. 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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