Swarm config playbook

ansible/swarms.yml

@@ -1,6 +1,144 @@
 ---
-- name: Configure swarms 
-  hosts: swarm
+- name: "Configure swarms"
+  hosts: swarm1
   roles:
     - common
-    - docker
+    - docker
+  tasks:
+  - name: "Prepare manager group"
+    add_host:
+      hostname: "{{ item }}"
+      groups: manager_group
+    with_items: "{{play_hosts}}"
+    when: hostvars[item]['swarm_master']
+
+  - name: "Prepare worker group"
+    add_host:
+      hostname: "{{ item }}"
+      groups: worker_group
+    with_items: "{{play_hosts}}"
+    when: not hostvars[item]['swarm_master']
+
+
+
+# From https://medium.com/@cantrobot/deploying-docker-swarm-with-ansible-a991c1028427
+
+- name: "Gather status of manager nodes"
+  hosts: manager_group
+  become_user: docker
+  tasks:
+  - name: "Load docker info as facts"
+    community.docker.docker_container_info:
+
+  - name: "Create swarm_manager_operational group"
+    add_host:
+      hostname: "{{ item }}"
+      groups: swarm_manager_operational
+    with_items: "{{ play_hosts }}"
+    when: "'{{ hostvars[item]['docker_info']['Swarm']['LocalNodeState'] }}' == 'active'"
+    run_once: true
+
+  - name: "Create swarm_manager_bootstrap group"
+    add_host:
+      hostname: "{{ item }}"
+      groups: swarm_manager_bootstrap
+    with_items: "{{ play_hosts }}"
+    when: "'{{ hostvars[item]['docker_info']['Swarm']['LocalNodeState'] }}' != 'active'"
+    run_once: true  
+
+
+
+- name: "Do the same for workers"
+  hosts: worker_group
+  become_user: docker
+  tasks:
+  - name: "Load docker info as facts"
+    community.docker.docker_container_info:
+
+  - name: "Create swarm_worker_operational group"
+    add_host:
+      hostname: "{{ item }}"
+      groups: swarm_worker_operational
+    with_items: "{{ play_hosts }}"
+    when: "'{{ hostvars[item]['docker_info']['Swarm']['LocalNodeState'] }}' == 'active'"
+    run_once: true
+
+  - name: "Create swarm_worker_bootstrap group"
+    add_host:
+      hostname: "{{ item }}"
+      groups: swarm_worker_bootstrap
+    with_items: "{{ play_hosts }}"
+    when: "'{{ hostvars[item]['docker_info']['Swarm']['LocalNodeState'] }}' != 'active'"
+    run_once: true  
+
+
+
+- name: "Bootstrap the swarm"
+  hosts: swarm_manager_bootstrap[0]
+  become_user: docker
+  tasks:
+    - name: initialize swarm cluster
+      shell: >
+        docker swarm init
+        --advertise-addr={{ swarm_iface | default('eth0') }}:2377
+      when: "'swarm_manager_operational' not in groups"
+      register: bootstrap_first_node
+
+    - name: add initialized host to swarm_manager_operational group
+      add_host:
+        hostname: "{{ play_hosts[0] }}"
+        groups: swarm_manager_operational
+      when: bootstrap_first_node | changed
+
+
+
+- name: "Retrieve the tokens"
+  hosts: swarm_manager_operational[0]
+  become: true
+  vars:
+    iface: "{{ swarm_iface | default('eth0') }}"
+  tasks:
+    - name: retrieve swarm manager token
+      shell: docker swarm join-token -q manager
+      register: swarm_manager_token
+
+    - name: retrieve swarm worker token
+      shell: docker swarm join-token -q worker
+      register: swarm_worker_token
+
+    - name: populate list of manager ips
+      add_host:
+        hostname: "{{ hostvars[item]['ansible_' + iface]['ipv4']['address'] }}"
+        groups: swarm_manager_ips
+      with_items: "{{ play_hosts }}"
+
+
+- name: "Join managers"
+  # filtered from possible bootstrap
+  hosts: swarm_manager_bootstrap:!swarm_manager_operational
+  become: true
+  vars:
+    token: "{{ hostvars[groups['swarm_manager_operational'][0]]['swarm_manager_token']['stdout'] }}"
+  tasks:
+    - name: join manager nodes to cluster
+      shell: >
+        docker swarm join
+        --advertise-addr={{ swarm_iface | default('eth0') }}:2377
+        --token={{ token }}
+        {{ groups['swarm_manager_ips'][0] }}:2377
+
+
+
+- name: "Join workers"
+  hosts: swarm_worker_bootstrap
+  become: true
+  vars:
+    token: "{{ hostvars[groups['swarm_manager_operational'][0]]['swarm_worker_token']['stdout'] }}"
+  tasks:
+    - name: join worker nodes to cluster
+      shell: >
+        docker swarm join
+        --advertise-addr={{ swarm_iface | default('eth0') }}:2377
+        --token={{ token }}
+        {{ groups['swarm_manager_ips'][0] }}:2377
+