在 CentOS 7 下如何使用 Ansible Playbook 实现 MySQL 8.0.34 的二进制安装

---
# mysql8_binary_install_playbook.yaml
- name: Install MySQL 8.0.34 Binary on CentOS 7
  hosts: db_servers # 更改为主机清单中对应安装MySQL的主机群组名称
  gather_facts: yes
  become: yes
  vars:
    mysql_version: 8.0.34
    mysql_archive_name: mysql-8.0.34-linux-glibc2.12-x86_64.tar.gz
    mysql_download_url: "https://dev.mysql.com/get/Downloads/MySQL-8.0/mysql-{mysql_archive_name}"
    mysql_data_dir: /var/lib/mysql
    mysql_config_file: /etc/my.cnf
    mysql_root_password: "your_strong_password"
  tasks:
  - name: Download MySQL 8.0.34 binary archive
    get_url:
      url: "{{ mysql_download_url.format(mysql_archive_name=mysql_archive_name) }}"
      dest: /usr/local/src/
      mode: 0644
  - name: Extract the MySQL binary archive
    unarchive:
      src: "/usr/local/src/{{ mysql_archive_name }}"
      dest: /usr/local/
      remote_src: yes
      creates: /usr/local/mysql/
  - name: Create MySQL data directory if it does not exist
    file:
      path: "{{ mysql_data_dir }}"
      state: directory
      owner: mysql
      group: mysql
      mode: 0750
  - name: Configure MySQL settings in my.cnf
    lineinfile:
      path: "{{ mysql_config_file }}"
      regexp: '^lower_case_table_names'
      line: 'lower_case_table_names=1'
      backup: yes
  - name: Initialize MySQL data directory
    command: >
      /usr/local/mysql/bin/mysqld --initialize-insecure
      --basedir=/usr/local/mysql
      --datadir={{ mysql_data_dir }}
    args:
      creates: "{{ mysql_data_dir }}/ibdata1"
  - name: Start MySQL service
    shell: |
      cd /usr/local/mysql
      ./bin/mysqld_safe &
    async: 30
    poll: 0
  - name: Wait for MySQL to be ready
    wait_for:
      port: 3306
      delay: 30
      timeout: 60
  - name: Set MySQL root password
    mysql_user:
      name: root
      host: localhost
      password: "{{ mysql_root_password }}"
      check_password_policy: no
      login_unix_socket: /var/run/mysqld/mysqld.sock
      update_password: always
      state: present
  # 您还可以进一步执行其他安全配置，比如删除匿名用户、禁用远程 root 登录等
  # 这些通常可以通过 mysql_secure_installation 脚本来完成，但在 Ansible 中需要转换为对应的 SQL 命令