Swarm setup doesn't require root

.gitignore

@@ -1 +1,3 @@
 .vagrant/
+
+*hosts.ini

main.yml

@@ -11,21 +11,18 @@
 
 - name: Initialize Docker swarm.
   hosts: admin
-  become: yes
   roles:
     - docker-swarm-init
   tags: swarm
 
 - name: Add managers to swarm.
   hosts: managers
-  become: yes
   roles:
     - docker-swarm-add-manager
   tags: swarm
 
 - name: Add workers to swarm.
   hosts: workers
-  become: yes
   roles:
     - docker-swarm-add-worker
   tags: swarm

roles/docker-swarm-add-manager/tasks/main.yml

@@ -8,6 +8,7 @@
   register: node_state
   shell: "docker info --format '{{ '{{' }}.Swarm.LocalNodeState{{ '}}' }}'"
   ignore_errors: true
+  changed_when: false
 
 - name: Add managers to the swarm
   shell: >

roles/docker-swarm-add-worker/tasks/main.yml

@@ -3,6 +3,7 @@
   register: node_state
   shell: "docker info --format '{{ '{{' }}.Swarm.LocalNodeState{{ '}}' }}'"
   ignore_errors: true
+  changed_when: false
 
 - name: Add worker to swarm.
   register: join_cmd