部署TiDB集群

架构图

节点规划

120.52.146.213	Control Machine
120.52.146.214	PD1_TiDB1
120.52.146.215	PD2_TiDB2
120.52.146.216	PD3
120.52.146.217	TiKV1
120.52.146.218	TiKV2
120.52.146.219	TiKV3

软件要求

CentOS 7.3 (64 bit) or later with Python 2.7 installed

1、在控制节点上安装依赖软件

# yum -y install epel-release git curl sshpass
# yum -y install python-pip

2、创建 tidb 用户

# useradd tidb
# passwd tidb

3、配置sudo权限

# visudo
tidb ALL=(ALL) NOPASSWD: ALL

4、切换用户，生成SSH-KEY

# su - tidb
$ ssh-keygen -t rsa

5、下载 tidb ansible 项目代码

$ git clone -b v3.0.4 https://github.com/pingcap/tidb-ansible.git

6、安装ansible和相关依赖

$ cd /home/tidb/tidb-ansible
$ sudo pip install -r requirements.txt
$ ansible --version

7、配置SSH互信

$ cd /home/tidb/tidb-ansible
$ vi hosts.ini
[servers]
120.52.146.214
120.52.146.215
120.52.146.216
120.52.146.217
120.52.146.218
120.52.146.219
[all:vars]
username = tidb
ntp_server = pool.ntp.org
$ ansible-playbook -i hosts.ini create_users.yml -u root -k

8、安装NTP

$ cd /home/tidb/tidb-ansible
$ ansible-playbook -i hosts.ini deploy_ntp.yml -u tidb -b

9、挂载磁盘（这一步可以在装系统的时候就准备好）

# fdisk -l
# parted -s -a optimal /dev/sdb mklabel gpt -- mkpart primary ext4 1 -1
# mkfs.ext4 /dev/sdb
# lsblk -f
# vim /etc/fstab
UUID=c51eb23b-195c-4061-92a9-3fad812cc12f /data1 ext4 defaults,nodelalloc,noatime 0 0
# mkdir /data1
# mount -a
# mount -t ext4
/dev/sdb on /data1 type ext4 (rw,noatime,nodelalloc,data=ordered)

10、根据集群架构修改 inventory.ini

## TiDB Cluster Part
[tidb_servers]
120.52.146.214
120.52.146.215
[tikv_servers]
120.52.146.217
120.52.146.218
120.52.146.219
[pd_servers]
120.52.146.214
120.52.146.215
120.52.146.216
[spark_master]
[spark_slaves]
[lightning_server]
[importer_server]
## Monitoring Part
# prometheus and pushgateway servers
[monitoring_servers]
120.52.146.214
[grafana_servers]
120.52.146.214
# node_exporter and blackbox_exporter servers
[monitored_servers]
120.52.146.214
120.52.146.215
120.52.146.216
120.52.146.217
120.52.146.218
120.52.146.219
[alertmanager_servers]
120.52.146.214

11、下载部署包到本地

$ ansible-playbook local_prepare.yml

12、初始化系统环境修改内核参数

$ ansible-playbook bootstrap.yml

13、部署tidb集群

$ ansible-playbook deploy.yml

14、启动集群

$ ansible-playbook start.yml

15、访问集群

$ mysql -uroot -h 120.52.146.214 -P 4000
Welcome to the MariaDB monitor.  Commands end with ; or \g.
Your MySQL connection id is 182
Server version: 5.7.25-TiDB-v3.0.4 MySQL Community Server (Apache License 2.0)
Copyright (c) 2000, 2018, Oracle, MariaDB Corporation Ab and others.
Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
MySQL [(none)]> show databases;
+--------------------+
| Database           |
+--------------------+
| INFORMATION_SCHEMA |
| PERFORMANCE_SCHEMA |
| mysql              |
| test               |
+--------------------+
4 rows in set (0.00 sec)

参考：

https://pingcap.com/docs/v3.0/how-to/deploy/orchestrated/ansible/

https://docs.ansible.com/ansible/latest/cli/ansible-playbook.html

https://dev.mysql.com/doc/mysql-yum-repo-quick-guide/en/