ansible创建mysql主从
时间: 2023-11-17 22:54:51 浏览: 157
使用Ansible创建MySQL主从复制的步骤如下:
1. 首先,在Ansible主机上安装Ansible,可以使用以下命令安装特定版本的Ansible:
```
pip install ansible==2.9
```
2. 然后,在Ansible主机上创建一个Ansible playbook文件,用于定义任务和配置。
3. 在playbook文件中,定义主服务器和从服务器的主机组和变量。例如:
```
[mysql_master]
10.4.0.17
[mysql_slave]
10.4.0.22
[mysql:children]
mysql_master
mysql_slave
[mysql:vars]
mysql_root_password=YourRootPassword
mysql_replication_user=YourReplicationUser
mysql_replication_password=YourReplicationPassword
```
在这个例子中,我们定义了两个主机组(mysql_master和mysql_slave)和一个父组(mysql),并设置了MySQL的根密码(mysql_root_password)和复制用户(mysql_replication_user)的密码(mysql_replication_password)。
4. 接下来,编写任务来配置主从复制。在playbook文件中,使用mysql_replication模块和一些变量来配置主从复制。例如:
```
- name: Configure MySQL master
hosts: mysql_master
become: true
become_user: root
tasks:
- name: Create replication user
mysql_user:
name: "{{ mysql_replication_user }}"
host: "%"
password: "{{ mysql_replication_password }}"
priv: "*.*:REPLICATION SLAVE"
state: present
register: replication_user_result
- name: Get master status
mysql_replication:
mode: status
register: master_status_result
- name: Configure MySQL slave
hosts: mysql_slave
become: true
become_user: root
tasks:
- name: Start slave replication
mysql_replication:
mode: change_master
master_host: "{{ hostvars['mysql_master'].inventory_hostname }}"
master_user: "{{ mysql_replication_user }}"
master_password: "{{ mysql_replication_password }}"
master_log_file: "{{ hostvars['mysql_master']['master_status_result']['File'] }}"
master_log_pos: "{{ hostvars['mysql_master']['master_status_result']['Position'] }}"
state: start_slave
```
这个任务首先在主服务器上创建复制用户,然后获取主服务器的状态。然后,在从服务器上配置从服务器的复制设置。
5. 最后,在Ansible主机上运行playbook文件,以创建MySQL主从复制。例如:
```
ansible-playbook playbook.yml
```
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