I have created this playbook to perform an in-place upgrade of an old MariaDB instance from 5.5.68 to 10.5, sequentially (this is the recommended upgrade path). The playbook works with RHEL7/CentOS7 only and assumes the default installation directories. It doesn't migrate the database settings. It saves the upgrade results locally on the host.
community.mysql.mysql_variablesinstalled on the controller- enabled SCL repos on the host
- MariaDB root password defined in a secret vault file
On each run, specify the old version and the new one, e.g.:
ansible-playbook mariadb-upgrade.yml --vault-password-file ~/vault.pwd --extra-vars "old_ver=5 new_ver=100"
ansible-playbook mariadb-upgrade.yml --vault-password-file ~/vault.pwd --extra-vars "old_ver=100 new_ver=101"
- name: upgrade mariadb
hosts: ...
become: yes
pre_tasks:
- name: check versions
assert:
that: old_ver in allowed_versions and new_ver in allowed_versions
fail_msg: No supported MariaDB version(s) provided
- name: check version sanity
assert:
that: new_ver|int > old_ver|int
fail_msg: Old version is greater than the new one
- name: include password from vault
include_vars: secrets/mariadb-root-webserver.yaml
vars:
allowed_versions: [ '5', '100', '101', '102', '103', '105' ]
utils_for: [ '102', '103', '105' ]
old_svc_name: "{{ 'mariadb' if old_ver == '5' else 'rh-mariadb' + old_ver + '-mariadb'}}"
new_svc_name: "rh-mariadb{{ new_ver }}-mariadb"
old_datadir: "{{ '/var/lib/mysql' if old_ver == '5' else '/var/opt/rh/rh-mariadb' + old_ver + '/lib/mysql' }}"
new_datadir: "/var/opt/rh/rh-mariadb{{ new_ver }}/lib/"
tasks:
- name: populate service facts
service_facts:
- name: check if old service exists
fail:
msg: The service {{ old_svc_name }} is not installed
when: ansible_facts.services[old_svc_name + '.service'] is not defined
- name: install required packages
package:
name:
- python2-PyMySQL
- rh-mariadb{{ new_ver }}-mariadb-server
- name: install database utils
package:
name:
- rh-mariadb{{ new_ver }}-mariadb-server-utils
when: new_ver in utils_for
- name: disable fast shutdown
community.mysql.mysql_variables:
variable: innodb_fast_shutdown
value: '0'
login_user: root
login_password: "{{ mariadb_root }}"
- name: stop and disable old mariadb service
service:
name: "{{ old_svc_name }}"
state: stopped
enabled: no
- name: copy mysql contents
copy:
src: "{{ old_datadir }}"
remote_src: yes
dest: "{{ new_datadir }}"
owner: mysql
group: mysql
- name: start and enable new mariadb service
service:
name: "{{ new_svc_name }}"
state: started
enabled: yes
- name: upgrade db
command: /opt/rh/rh-mariadb{{ new_ver }}/root/usr/bin/mysql_upgrade --verbose --verbose -u root -p{{ mariadb_root }}
register: upgrade
no_log: True
- name: save upgrade result
copy:
content: "{{ upgrade.stdout }}"
dest: output/mariadb_upgrade_{{ ansible_hostname }}_{{ ansible_date_time.date }}_{{ ansible_date_time.time }}.txt
become: no
delegate_to: localhost
- name: restart new mariadb service
service:
name: "{{ new_svc_name }}"
state: restarted
enabled: yes