Galera cluster deployment based on docker swarm using Linux Containers (LXC) with automatic deployment via Ansible.
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---
- name: Prepare swarm manager
docker_swarm:
state: present
advertise_addr: "{{ interface }}"
when: inventory_hostname in groups['manager']
- name: Get the Manager join-token
shell: docker swarm join-token --quiet worker
register: worker_token
when: inventory_hostname in groups['manager']
- name: Create 'mariadb' overlay network
shell: docker network create -d overlay --subnet=10.0.10.0/24 mariadb
ignore_errors: true
when: inventory_hostname in groups['manager']
- name: Prepare swarm workers
docker_swarm:
state: join
advertise_addr: "{{ interface }}"
join_token: "{{ hostvars[groups['manager'][0]]['worker_token']['stdout'] }}"
#remote_addrs: "{{ hostvars[groups['manager'][0]]['ansible_lxcbr0_ipv4.address'] }}"
remote_addrs: "10.0.3.1"
when: inventory_hostname in groups['workers']
- name: Prepare docker mysql data volume
file:
path: /var/lib/mysql
state: directory
mode: '0777'
recurse: true
when: inventory_hostname in groups['workers']
#- name: Prepare docker mysql configuration volume
# file:
# path: /etc/container_data/mysql
# state: directory
# mode: '0777'
# recurse: true
# when: inventory_hostname in groups['workers']
- name: Add docker labels for galera master and secondary nodes
shell: |
docker node update --label-add node1=true worker1
docker node update --label-add node2=true worker2
when: inventory_hostname in groups['manager']
#- name: Add docker labels for galera secondary nodes
# docker_node:
# labels:
# hostname: 'worker2'
# node2: true
# when: inventory_hostname in groups['workers']
- name: Pull 'colinmollenhour/mariadb-galera-swarm' docker image
docker_image:
name: 'colinmollenhour/mariadb-galera-swarm'
source: pull
when: inventory_hostname in groups['workers']
- name: Touch flag bootstrap file inside mariadb volume
shell: touch /var/lib/mysql/new-cluster
when: inventory_hostname in groups['workers'][0]