Install MySQL 5.7 via Ansible

handlers.yml

---
- name: restart apparmor
  become: yes
  service:
    name: apparmor
    state: restarted

- name: restart mysql
  become: yes
  service:
    name: mysql
    state: restarted

main.yml

---
- name: Install Percona Server apt signing key
  become: yes
  apt_key:
    keyserver: keys.gnupg.net
    id: 8507EFA5
    state: present

- name: Install Percona Server apt repository
  become: yes
  apt_repository:
    repo: 'deb http://repo.percona.com/apt xenial main'
    state: present

- name: Install Percona Server apt source repository
  become: yes
  apt_repository:
    repo: 'deb-src http://repo.percona.com/apt xenial main'
    state: present

- name: Update apt cache
  become: yes
  apt:
    update_cache: yes

- name: Install Percona 5.7 Server
  become: yes
  apt:
    pkg: percona-server-common-5.7
    state: latest
    update_cache: yes
  environment:
    DEBIAN_FRONTEND: noninteractive

- name: Install Percona 5.7 Server
  become: yes
  apt:
    pkg: percona-server-client-5.7
    state: latest
    update_cache: yes
  environment:
    DEBIAN_FRONTEND: noninteractive

- name: Install Percona 5.7 Server
  become: yes
  apt:
    pkg: percona-server-server-5.7
    state: latest
    update_cache: yes
  environment:
    DEBIAN_FRONTEND: noninteractive

- name: Install python packages
  become: yes
  apt: pkg={{ item }} state=present
  with_items:
    - vim
    - python-pycurl
    - python-mysqldb

- name: Ensure mysql is started
  become: yes
  service:
    name: mysql
    state: started

- name: Remove anonymous MySQL user accounts
  become: yes
  mysql_user:
    name: ''
    host: localhost
    state: absent

- name: Remove anonymous MySQL user accounts
  become: yes
  mysql_user:
    name: ''
    host_all: yes
    state: absent

- name: Update mysql root password for all root accounts
  become: yes
  mysql_user:
    name: root
    host: "{{ item }}"
    password: "{{ dbs[environment].password }}"
    priv: "*.*:ALL,GRANT"
  with_items:
    - "{{ ansible_hostname }}"
    - "%"
    - 127.0.0.1
    - ::1
    - localhost

- name: Update ~/.my.cnf file
  become: yes
  template:
    src: ../templates/user_my.cnf.j2
    dest: ~/.my.cnf

- name: Check MySQL Data Directory
  command: >
    mysql --user=root --password={{ dbs[environment].password }}
      --batch --skip-column-names --execute="SELECT @@datadir;"
  register: mysql_datadir
  check_mode: False
  changed_when: False

- name: Stop MySQL
  become: yes
  service:
    name: mysql
    state: stopped
  when: mysql_datadir.stdout == "/var/lib/mysql/"

- name: Change MySQL Data Directory
  become: yes
  command: >
    rsync -av /var/lib/mysql "/mnt/database-storage-{{environment}}"
  when: mysql_datadir.stdout == "/var/lib/mysql/"

- name: Move old MySQL Data Directory
  become: yes
  command: mv /var/lib/mysql /var/lib/mysql.bak
  when: mysql_datadir.stdout == "/var/lib/mysql/"

- name: Restart mysql
  become: yes
  service:
    name: mysql
    state: restarted

- name: Modify [mysqld] config options
  become: yes
  ini_file:
    path: /etc/mysql/percona-server.conf.d/mysqld.cnf
    section: mysqld
    option: "{{ item.option }}"
    value: "{{ item.value }}"
    state: "{{ item.state }}"
  with_items:
    - { option: "bind-address", value: 0.0.0.0, state: absent }
    - { option: "default-storage-engine", value: InnoDB, state: present }
    - { option: sql_mode, value: "STRICT_TRANS_TABLES,NO_ZERO_IN_DATE,NO_ZERO_DATE,ERROR_FOR_DIVISION_BY_ZERO,NO_AUTO_CREATE_USER,NO_ENGINE_SUBSTITUTION", state: present }
    - { option: "symbolic-links", value: 0, state: present }
    - { option: datadir, value: "/mnt/database-storage-{{environment}}/mysql/", state: present }
    - { option: "log-bin", value: "/mnt/database-storage-{{environment}}/mysql/mysql-bin", state: present }
    - { option: "expire-logs-days", value: 14, state: present }
    - { option: "sync-binlog", value: 1, state: present }
    - { option: "log-error", value: "/var/log/mysql/mysql-error.log", state: present }
    - { option: "log-queries-not-using-indexes", value: 1, state: present }
    - { option: "slow-query-log", value: 1, state: present }
    - { option: "slow-query-log-file", value: "/var/log/mysql/mysql-slow.log", state: present }
    - { option: "tmp-table-size", value: 32M, state: present }
    - { option: "max-heap-table-size", value: 32M, state: present }
    - { option: "query-cache-type", value: 0, state: present }
    - { option: "query-cache-size", value: 0, state: present }
    - { option: "max-connections", value: 500, state: present }
    - { option: "thread-cache-size", value: 50, state: present }
    - { option: "open-files-limit", value: 65535, state: present }
    - { option: "table-definition-cache", value: 1024, state: present }
    - { option: "table-open-cache", value: 2048, state: present }
    - { option: "key-buffer-size", value: 32M, state: present }
    - { option: "lc-messages-dir", value: "/usr/share/mysql", state: present }
    - { option: "myisam-recover", value: "FORCE,BACKUP", state: absent }
    - { option: "max-allowed-packet", value: 16M, state: present }
    - { option: "max-connect-errors", value: 1000000, state: present }
  notify:
    - restart mysql

- name: Configure MySQL my.cnf file
  become: yes
  copy:
    src: "../files/{{environment}}/my.cnf"
    dest: /etc/mysql/percona-server.conf.d/my.cnf
  notify:
    - restart mysql

- name: Change Apparmor Access Control Rules
  become: yes
  lineinfile:
    dest: /etc/apparmor.d/tunables/alias
    regexp: "^alias /var/lib/mysql"
    line: "alias /var/lib/mysql/ -> /mnt/database-storage-{{environment}}/mysql/,"
    state: present
  notify:
    - restart apparmor

- name: Start MySQL
  become: yes
  service:
    name: mysql
    state: started

my.cnf

[mysqld]
# Values obtained from using the Percona server conf generator. These are the values that change between server configs based on RAM, CPUs etc.

explicit_defaults_for_timestamp

# INNODB #
innodb-flush-method            = O_DIRECT
innodb-log-files-in-group      = 2
innodb-log-file-size           = 256M
innodb-flush-log-at-trx-commit = 1
innodb-file-per-table          = 1
innodb-buffer-pool-size        = 12G
server-id                      = 72364823

user_my.cnf.j2

[client]
password={{ dbs[environment].password }}