工具: Ansible Playbook 安装 Mysql 并配置主从复制

标签：主从复制 shell name ansible Ansible master Playbook mysql role

准备工作

主机信息

IP	名称	角色
192.168.114.133	node1	master
192.168.114.134	node2	slave
192.168.114.135	node3	slave

安装ansible

Ansible 是一个自动化运维管理的工具，可以支持同时管理多台节点，ansible playbook 支持编写 yml 格式的配置，来管理多个主机节点。

ansible软件不需要每个节点都安装，只需要指定其中一个节点作为主节点就可以，在此示例中，我们选择 node1 作为我们的管理节点来安装ansible

自动化安装脚本

脚本安装ansible
脚本配置免密登录

配置免密登录手续首先需要每个服务器的密码，这里我们三天主机的密码统一设置成一个放在配置文件 ssh_password下
解析 config.ini ，并生成 ansible 认识的 hosts 文件

配置文件 config.ini

[ssh_password]
halou

[mysql]
192.168.114.133 master
192.168.114.134 slave
192.168.114.135 slave

脚本 auto_install_ansible.sh

#!/bin/bash

#auto insall ansible
#自动化安装ansible软件


CUR_PATH=$(readlink -f $(dirname $0))

#打印日志
function result_echo
{
    if [ $? -eq 0 ]; then 
        echo "$1" | tee -a $CUR_PATH/log.log
    else
        echo "$2" | tee -a $CUR_PATH/log.log
        exit 1
    fi
}

HOST_LIST=`sed -n '/\[mysql\]/,/\[.*\]/p' ./config.ini | grep -v "\[.*\]" | grep -v ^$ | grep -v ^# | awk '{print $1}'`
SSH_PASSWORD=`sed -n '/\[ssh_password\]/,/\[.*\]/p' ./config.ini | grep -v "\[.*\]" | grep -v ^$ | grep -v ^# `

yum repolist | grep epel &> /dev/null

if [ $? -ne 0 ];then
    yum install epel-release -y
    yum makecache
fi

yum install sshpass ansible -y

#生成秘钥，并发送给各个节点执行
echo -e "y\n" | ssh-keygen -t rsa -q -N "" -f ~/.ssh/id_rsa


for host in $HOST_LIST;do
    sshpass -p$SSH_PASSWORD ssh-copy-id -o StrictHostKeyChecking=no root@$host &> /dev/null
    ssh -o StrictHostKeyChecking=no root@$host 'ls -al' &> /dev/null

    result_echo "Ok... No password login is success" "Failed...Use no password login failed, please check！！！"
    
done	



#使用ansible管理主机节点

if [ -e $CUR_PATH/hosts ]; then
    rm -f $CUR_PATH/hosts
fi

echo "[mariadb_hosts]" >> $CUR_PATH/hosts
for host in $HOST_LIST;do
    echo $host >> $CUR_PATH/hosts
done

安装 mariadb

使用ansible-playbook 编写安装脚本 yaml

注意事项

自定义主机操作列表 hosts 文件

[mariadb_hosts]
192.168.114.133 server_id='1' mysql_role=master
192.168.114.134 server_id='2' mysql_role=salve
192.168.114.135 server_id='3' mysql_role=salve

定义需要应用的变量，位置根目录/group_vars/all.yml

MYSQL_DATA_DIR: /www/mysql/data_dir
MASTER_IP:  192.168.114.133

安装脚本主题 auto_install_mariadb.yml

- hosts: mariadb_hosts

  tasks:
    - name: "if repo list exists"
      shell: "yum repolist | grep epel &> /dev/null"
      register: repolist_result
      failed_when: false
      when: mysql_role == "master"

    - name: "install epel_release"
      shell: " yum install epel-release -y"
      when: 
        - mysql_role == "master"
        - repolist_result.rc != 0
       

    - name: "stop firewalld"
      shell: systemctl stop firewalld && systemctl disable firewalld
    
    - name: setenforce zero
      shell: getenforce | grep Disabled &> /dev/null || setenforce 0
    
    - name: stop SeLinux
      lineinfile: path=/etc/sysconfig/selinux regexp="^SELINUX=" line="SELINUX=disabled"

    - name: delete data dir if exists
      shell: "rm -rf {{ MYSQL_DATA_DIR }}"
    
    - name: mkdir data dir
      shell: "[[ -d {{ MYSQL_DATA_DIR }} ]] || mkdir -p {{ MYSQL_DATA_DIR }}"

    - name: yum install mariadb
      shell: yum install mariadb mariadb-server -y

    - name: set datadir
      lineinfile: path=/etc/my.cnf regexp="^datadir" line="datadir={{ MYSQL_DATA_DIR }}" insertafter="\[mysqld\]"

    - name: server_id
      lineinfile: path=/etc/my.cnf line="server_id={{ server_id }}" insertafter="\[mysqld\]"
    
    - name: set master 
      lineinfile: path=/etc/my.cnf regexp="^log-bin" line="log-bin=master-bin" insertafter="^\[mysqld\]"
      when: mysql_role == "master"
    - name: set slave
      lineinfile: path=/etc/my.cnf line="relay-log=slave-log" insertafter="^\[mysqld\]"
      when: mysql_role == "salve"

    - name: chown mysql dir
      shell: chown -R mysql:mysql {{ MYSQL_DATA_DIR }} 

    - name: restart mariadb
      shell: systemctl restart mariadb

    - name: grant slave user
      shell: mysql -e "GRANT REPLICATION SLAVE ON *.* TO 'slave_user'@'%' IDENTIFIED BY 'demo_pass'"
      when: mysql_role == "master"

    - name: master bin log name
      shell: "mysql -e \"show master status\\G;\" | grep File | awk -F: '{print $2}' | awk '{gsub(/^\\s+|\\s+$/, \"\");print}' > ~/master_name"
      when: mysql_role == "master"

    - name: master bin position
      shell: "mysql -e \"show master status\\G;\" | grep Position | awk -F: {'print $2'} | awk '{gsub(/^\\s+|\\s+$/, \"\");print}' > ~/postion_name"
      
      when: mysql_role == "master"

    - name: copy master name
      ansible.builtin.copy:
        src: ~/master_name
        dest: ~/master_name
    - name: copy postion
      ansible.builtin.copy:
        src: ~/postion_name
        dest: ~/postion_name

    - name: cat master name
      shell: cat ~/master_name
      register: master_name

    - name: cat postion 
      shell: cat ~/postion_name
      register: master_postion

    - name: reset slave
      shell: mysql -e "reset slave "
      when: mysql_role == "salve"
    
    - name: change master
      shell: mysql -e "CHANGE MASTER TO master_host='{{ MASTER_IP }}', master_user='slave_user', master_password='demo_pass', master_log_file='{{ master_name.stdout }}',master_log_pos={{ master_postion.stdout }} "
      when: mysql_role == "salve"
     
    
    - name: start slave
      shell: mysql -e "start slave "
      when: mysql_role == "salve"

参考资料:

https://github.com/ansible/ansible-examples/blob/master/mongodb/playbooks/testsharding.yml 【ansible 安装mongodb示例】

https://docs.ansible.com/ansible/latest/user_guide/playbooks_variables.html 【ansible 变量引用】

https://www.cnblogs.com/haloujava/p/16561883.html 【一键安装Mysql并配置主从复制】

标签：主从复制,shell,name,ansible,Ansible,master,Playbook,mysql,role
From： https://www.cnblogs.com/haloujava/p/16633245.html