ansible-playbook批量部署MySQL

桃扇骨 2022-02-26 09:42 737阅读 0赞

通过ansible-playbook，以二进制包方式批量部署mysql。

*  将所有部署mysql主机分为dbserver组：

# vim /etc/ansible/hosts
    [dbserver]
    192.168.30.128
    192.168.30.129
    192.168.30.130

*  创建管理目录：

# mkdir -p mysql/roles/mysql_install/{files,handlers,meta,tasks,templates,vars}
    
    # cd mysql/

说明：

files：存放需要同步到异地服务器的源码文件及配置文件； 
    handlers：当资源发生变化时需要进行的操作，若没有此目录可以不建或为空； 
    meta：存放说明信息、说明角色依赖等信息，可留空； 
    tasks：mysql安装过程成需要进行的执行的任务； 
    templates：用于执行mysql安装的模板文件，一般为脚本； 
    vars：本次安装定义的变量

# tree .
    .
    ├── mysql.yml
    └── roles
        └── mysql_install
            ├── files
            │   └── mysql-5.7.25-linux-glibc2.12-x86_64.tar.gz              #可提前下载好mysql包放到files下
            ├── handlers
            ├── meta
            ├── tasks
            │   ├── copy.yml
            │   ├── install.yml
            │   ├── main.yaml
            │   └── prepare.yml
            ├── templates
            │   ├── change_passwd.sh
            │   ├── my.cnf
            │   └── mysqld.service
            └── vars
                └── main.yml
    
    8 directories, 10 files

--------------------

*  创建mysql入口文件，用来调用mysql\_install：

# vim mysql.yml 
    
    #用于批量安装MySQL
    ---
    - hosts: dbserver
      remote_user: root
      gather_facts: True
    
      roles:
        - mysql_install

*  创建变量：

# vim roles/mysql_install/vars/main.yml
    
    #定义mysql安装中的变量
    MYSQL_VER: 5.7.25
    MYSQL_VER_MAIN: "{ { MYSQL_VER.split('.')[0] }}.{ { MYSQL_VER.split('.')[1] }}"
    
    DOWNLOAD_URL: https://mirrors.tuna.tsinghua.edu.cn/mysql/downloads/MySQL-{ {  MYSQL_VER_MAIN }}/mysql-{ {  MYSQL_VER }}-linux-glibc2.12-x86_64.tar.gz
    MYSQL_USER: mysql
    MYSQL_PORT: 3306
    MYSQL_PASSWD: 123456789
    SOURCE_DIR: /software
    BASE_DIR: /usr/local/mysql
    DATA_DIR: /data/mysql

*  创建模板文件：

mysql配置文件

# vim roles/mysql_install/templates/my.cnf
    
    [client]
    port    = { {  MYSQL_PORT }}
    socket = { {  BASE_DIR }}/tmp/mysql.sock
    
    [mysql]
    default-character-set=utf8
    
    [mysqld]
    default-storage-engine=INNODB
    character_set_server=utf8
    explicit_defaults_for_timestamp
    basedir={ {  BASE_DIR }}
    datadir={ {  DATA_DIR }}
    socket={ {  BASE_DIR }}/tmp/mysql.sock
    log_error = { {  BASE_DIR }}/log/error.log
    
    sql_mode=STRICT_TRANS_TABLES,NO_ZERO_IN_DATE,NO_ZERO_DATE,ERROR_FOR_DIVISION_BY_ZERO,NO_AUTO_CREATE_USER,NO_ENGINE_SUBSTITUTION

mysql服务文件

# vim roles/mysql_install/templates/mysqld.service
    
    [Unit]
    Description=MySQL Server
    After=network.target
    After=syslog.target
    
    [Install]
    WantedBy=multi-user.target
    
    [Service]
    User=mysql
    Group=mysql
    ExecStart={ {  BASE_DIR }}/bin/mysqld --defaults-file=/etc/my.cnf
    
    #连接数限制
    LimitNOFILE=65535
    LimitNPROC=65535
    
    #Restart配置可以在进程被kill掉之后，让systemctl产生新的进程，避免服务挂掉
    #Restart=always
    PrivateTmp=false

更改数据库root密码脚本

# vim roles/mysql_install/templates/change_passwd.sh
    
    #!/bin/bash
    #该脚本用于更改数据库root密码
    
    passwd={ {  MYSQL_PASSWD }}
    n=`grep "{ { BASE_DIR }}/bin" /etc/profile |wc -l`
    
    if [ $n -eq 0 ]
    then
            echo "export PATH=$PATH:{ { BASE_DIR }}/bin" >> /etc/profile
            source /etc/profile
    else
            source /etc/profile
    fi
    
    { {  BASE_DIR }}/bin/mysql -uroot -D mysql -e "UPDATE user SET authentication_string=PASSWORD("$passwd") WHERE user='root';"
    
    { {  BASE_DIR }}/bin/mysql -uroot -e "FLUSH PRIVILEGES;"
    
    { {  BASE_DIR }}/bin/mysql -uroot -p$passwd -e "grant all privileges on *.* to root@'%' identified by '$passwd';"

*  环境准备prepare.yml：

# vim roles/mysql_install/tasks/prepare.yml

- name: 关闭firewalld
      service: name=firewalld state=stopped enabled=no
    
    - name: 临时关闭 selinux
      shell: "setenforce 0"
      failed_when: false
    
    - name: 永久关闭 selinux
      lineinfile:
        dest: /etc/selinux/config
        regexp: "^SELINUX="
        line: "SELINUX=disabled"
    
    - name: 添加EPEL仓库
      yum: name=epel-release state=latest
    
    - name: 安装常用软件包
      yum:
        name:
          - vim
          - lrzsz
          - net-tools
          - wget
          - curl
          - bash-completion
          - rsync
          - gcc
          - unzip
          - git
          - perl-Data-Dumper
          - libaio-devel
        state: latest
    
    - name: 更新系统
      shell: "yum update -y"
      args:
        warn: False

*  文件拷贝copy.yml：

# vim roles/mysql_install/tasks/copy.yml

- name: 创建mysql用户组
      group: name={ {  MYSQL_USER }}  state=present
    
    - name: 创建mysql用户
      user: name={ {  MYSQL_USER }}  group={ {  MYSQL_USER }}  state=present create_home=False shell=/sbin/nologin
    
    - name: 创建所需目录
      file: name={ {  item }} state=directory mode=0755 recurse=yes
      with_items:
      - "{ { SOURCE_DIR }}"
      - "{ { DATA_DIR }}"
    
    - name: 更改目录属主属组
      file: name={ {  DATA_DIR }} owner={ {  MYSQL_USER }} group={ {  MYSQL_USER }}
    
    #当前主机下没有mysql包
    - name: 下载mysql包
      get_url: url={ {  DOWNLOAD_URL }} dest={ {  SOURCE_DIR }} owner={ {  MYSQL_USER }} group={ {  MYSQL_USER }}
    
    #当前主机file目录下已有mysql包
    #- name: 拷贝现有mysql包到所有主机
    # copy: src=mysql-{ { MYSQL_VER }}-linux-glibc2.12-x86_64.tar.gz dest={ { SOURCE_DIR }} owner={ { MYSQL_USER }} group={ { MYSQL_USER }}
    
    - name: 解压mysql包
      unarchive: src={ {  SOURCE_DIR }}/mysql-{ {  MYSQL_VER }}-linux-glibc2.12-x86_64.tar.gz dest=/usr/local owner={ {  MYSQL_USER }} group={ {  MYSQL_USER }}
    
    - name: 目录重命名
      shell: "mv /usr/local/mysql-{ { MYSQL_VER }}-linux-glibc2.12-x86_64 { { BASE_DIR }} && chown -R { { MYSQL_USER }}:{ { MYSQL_USER }} { { BASE_DIR }}"
    
    #复制mysql配置文件
    - name: 拷贝mysql配置文件
      template: src=my.cnf dest=/etc/my.cnf owner=root group=root
    
    #复制mysql服务文件
    - name: 拷贝mysql服务文件
      template: src=mysqld.service dest=/usr/lib/systemd/system/mysqld.service owner=root group=root
    
    #复制更改密码脚本
    - name: 拷贝更改密码脚本
      template: src=change_passwd.sh dest={ {  SOURCE_DIR }} owner=root group=root
    
    - name: 创建日志目录
      file: name={ {  item }} state=directory owner={ {  MYSQL_USER }} group={ {  MYSQL_USER }} mode=0755 recurse=yes
      with_items:
      - "/var/log/mysql"
      - "/var/run/mysqld"
      - "{ { BASE_DIR }}/tmp"
      - "{ { BASE_DIR }}/log"
    
    - name: 创建错误日志文件
      file: dest={ {  BASE_DIR }}/log/error.log state=touch owner={ {  MYSQL_USER }} group={ {  MYSQL_USER }}

*  mysql初始化install.yml：

# vim roles/mysql_install/tasks/install.yml

#初始化安装mysql
    - name: mysql初始化
      shell: "{ { BASE_DIR }}/bin/mysqld --initialize-insecure --user={ { MYSQL_USER }} --basedir={ { BASE_DIR }} --datadir={ { DATA_DIR }}"
    
    - name: 拷贝启动脚本到/etc下
      copy: src={ {  BASE_DIR }}/support-files/mysql.server dest=/etc/init.d/mysql
    
    - name: 修改启动脚本_1
      lineinfile:
        dest: /etc/init.d/mysql
        regexp: "^basedir="
        insertbefore: "^# Default value, in seconds, afterwhich the script should timeout waiting"
        line: "basedir={ { BASE_DIR }}"
    
    - name: 修改启动脚本_2
      lineinfile:
        dest: /etc/init.d/mysql
        regexp: "^datadir="
        insertbefore: "^# Default value, in seconds, afterwhich the script should timeout waiting"
        line: "datadir={ { DATA_DIR }}"
    
    - name: 修改启动脚本_3  
      file: dest=/etc/init.d/mysql state=file mode=0755
    
    - name: 配置环境变量
      shell: " if [ `grep { { BASE_DIR }}/bin /etc/profile |wc -l` -eq 0 ]; then echo export PATH=$PATH:{ { BASE_DIR }}/bin >> /etc/profile && source /etc/profile; else source /etc/profile; fi"
    
    - name: 启动mysql并开机启动
      shell: "systemctl daemon-reload && systemctl enable mysqld && systemctl start mysqld"
    
    - name: 设置数据库root密码
      shell: "bash { { SOURCE_DIR }}/change_passwd.sh"

*  引用文件main.yml：

# vim roles/mysql_install/tasks/main.yml

#引用prepare、copy、install模块
    - include: prepare.yml
    - include: copy.yml
    - include: install.yml

*  执行安装：

# ansible-playbook mysql.yml

# netstat -lntp |grep 3306
    tcp6       0      0 :::3306                 :::*                    LISTEN      30768/mysqld

mysql安装目录是`/usr/local/mysql`，数据存放目录是`data/mysql`，而且数据库root的密码是`123456789`。

测试安装没有问题，如果本地没有下载好的mysql包，安装会慢一点。已存放至个人gitgub：[ansible-playbook][]

--------------------

[ansible-playbook]: https://github.com/Tobewont/ansible-playbook