在 ubuntu 上使用 ansible 安装 MySQL

问题描述

我在流浪的 ubuntu 上安装带有 ansible 的 MySQL 时遇到问题，

I have a problem installing MySQL with ansible on a vagrant ubuntu,

这是我的 MySQL 部分

This is my MySQL part

---
- name: Install MySQL
  apt:
    name: "{{ item }}"
  with_items:
    - python-mysqldb
    - mysql-server

- name: copy .my.cnf file with root password credentials
  template: 
    src: templates/root/.my.cnf
    dest: ~/.my.cnf
    owner: root
    mode: 0600

- name: Start the MySQL service
  service: 
    name: mysql 
    state: started
    enabled: true

  # 'localhost' needs to be the last item for idempotency, see
  # http://ansible.cc/docs/modules.html#mysql-user
- name: update mysql root password for all root accounts
  mysql_user: 
    name: root 
    host: "{{ item }}" 
    password: "{{ mysql_root_password }}" 
    priv: "*.*:ALL,GRANT"
  with_items:
    - "{{ ansible_hostname }}"
    - 127.0.0.1
    - ::1
    - localhost 

我有这个错误

failed: [default] => (item=vagrant-ubuntu-trusty-64) => {"failed": true, "item": "vagrant-ubuntu-trusty-64"}
msg: unable to connect to database, check login_user and login_password are correct or ~/.my.cnf has the credentials
failed: [default] => (item=127.0.0.1) => {"failed": true, "item": "127.0.0.1"}
msg: unable to connect to database, check login_user and login_password are correct or ~/.my.cnf has the credentials
failed: [default] => (item=::1) => {"failed": true, "item": "::1"}
msg: unable to connect to database, check login_user and login_password are correct or ~/.my.cnf has the credentials
failed: [default] => (item=localhost) => {"failed": true, "item": "localhost"}
msg: unable to connect to database, check login_user and login_password are correct or ~/.my.cnf has the credentials

我的 .my.cnf 是

my .my.cnf is

[client]
user=root
password={{ mysql_root_password }}

当复制到服务器上时

[client]
user=root
password=root

我不明白为什么，创建了 ~/.my.cnf

I don't understand why, ~/.my.cnf is created

项目 Github

谢谢

推荐答案

当 mysql-server 无头安装时，没有密码.因此，要使 .my.cnf 工作，它应该有一个空白的密码行.这是我为 .my.cnf 测试的内容:

When mysql-server is installed headlessly, there's no password. Therefore to make .my.cnf work, it should have a blank password line. Here's what I tested with for a .my.cnf:

[client]
user=root
password=

将 .my.cnf 放在您的 vagrant 用户目录中也有点奇怪，因为它由 root 拥有并且只能作为 root 读取.

It's also slightly strange to put .my.cnf in your vagrant user directory as owned by root and only readable as root.

确保 .my.cnf 中的密码为空后，我能够在这四个上下文中正确设置 root 的密码.请注意，此后它无法运行，因为需要更新 .my.cnf，因此它无法通过幂等性测试.

After ensuring the password was blank in .my.cnf, I was able to properly set the password for root in those four contexts. Note that it fails to run after that, since .my.cnf would need to be updated, so it fails the idempotency test.

ansible mysql_user 模块页面上有一条注释，建议先写密码，然后然后写.my.cnf 文件.如果你这样做，你需要一个 where 子句到 mysql_user 操作(可能在此之前有一个文件统计信息).

There's a note on the ansible mysql_user module page that suggests writing the password and then writing the .my.cnf file. If you do that, you need a where clause to the mysql_user action (probably with a file stat before that).

更优雅的是将 check_implicit_admin 与 login_user 和 login_password 一起使用.这真是幂等的.

Even more elegant is to use check_implicit_admin along with login_user and login_password. That's beautifully idempotent.

作为第三种方式，也许 check_implicit_admin 会更容易.

As a third way, perhaps check_implicit_admin makes it even easier.

这是我成功的剧本，展示了上述内容，并在几台新服务器上进行了测试.有点为此感到自豪.注意所有这些都不需要 .my.cnf.

Here's my successful playbook showing the above, tested with a few fresh servers. Kinda proud of this. Note .my.cnf is unnecessary for all of this.

---
- hosts: mysql
  vars:
    mysql_root_password: fart
  tasks:
  - name: Install MySQL
    apt: name={{ item }} update_cache=yes cache_valid_time=3600 state=present
    sudo: yes
    with_items:
    - python-mysqldb
    - mysql-server
  #- name: copy cnf
  #  copy: src=.my.cnf dest=~/.my.cnf owner=ubuntu mode=0644
  #  sudo: yes
  - name: Start the MySQL service
    sudo: yes
    service: 
      name: mysql 
      state: started
      enabled: true
  - name: update mysql root password for all root accounts
    sudo: yes
    mysql_user: 
      name: root 
      host: "{{ item }}" 
      password: "{{ mysql_root_password }}"
      login_user: root
      login_password: "{{ mysql_root_password }}"
      check_implicit_admin: yes
      priv: "*.*:ALL,GRANT"
    with_items:
      - "{{ ansible_hostname }}"
      - 127.0.0.1
      - ::1
      - localhost 

(编辑-删除了 my.cnf)

(edit- removed my.cnf)

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