Docker image pull (#66)

* removed commented line and extra line

* Added role docker_image_pull and playbook to pull all images

* changed delegate to docker_swarm_nodes for image pull

docker-image-pull.yml

@@ -0,0 +1,5 @@
+- hosts: docker_services
+  # no need for gathered facts to push the image
+  gather_facts: no
+  roles:
+    - role: docker_image_pull

roles/docker_image_pull/meta/main.yml

@@ -0,0 +1,2 @@
+dependencies:
+  - role: docker_login

roles/docker_image_pull/tasks/main.yml

@@ -0,0 +1,8 @@
+- name: pull images on all hosts
+  docker_image:
+    name: "{{ repository_deploy_image }}"
+    source: pull
+  loop: "{{ groups['docker_swarm_nodes'] }}"
+  delegate_to: "{{ item }}"
+  become: "{{ docker_become_user is defined }}"
+  become_user: "{{ docker_become_user|default(omit) }}"

roles/docker_service_deploy/tasks/pull_images.yml

@@ -1,11 +1,9 @@
 ---
 - name: pull images on all hosts
   docker_image:
-    #name: "{{ repository }}:443/{{ docker_image_name }}:{{ version }}"
     name: "{{ repository_deploy_image }}"
     source: pull
-  loop: "{{ groups['docker_swarm_managers'] }}"
+  loop: "{{ groups['docker_swarm_nodes'] }}"
   delegate_to: "{{ item }}"
   become: "{{ docker_become_user is defined }}"
   become_user: "{{ docker_become_user|default(omit) }}"
-