Distribute downloaded artifacts

Signed-off-by: Bogdan Dobrelya <bdobrelia@mirantis.com>

roles/download/tasks/main.yml

@@ -9,6 +9,7 @@
 - name: Create dest directories
   file: path={{local_release_dir}}/{{download.dest|dirname}} state=directory recurse=yes
   when: "{{ download.enabled|bool and not download.container|bool }}"
+  delegate_to: "{{ groups['kube-master'][0] if download_run_once|bool else omit }}"
   run_once: "{{ download_run_once|bool }}"
 
 - name: Download items
@@ -23,6 +24,7 @@
   retries: 4
   delay: "{{ 20 | random + 3 }}"
   when: "{{ download.enabled|bool and not download.container|bool }}"
+  delegate_to: "{{ groups['kube-master'][0] if download_run_once|bool else omit }}"
   run_once: "{{ download_run_once|bool }}"
 
 - name: Extract archives
@@ -33,6 +35,7 @@
     mode: "{{ download.mode|default(omit) }}"
     copy: no
   when: "{{ download.enabled|bool and not download.container|bool and download.unarchive is defined and download.unarchive == True }}"
+  delegate_to: "{{ groups['kube-master'][0] if download_run_once|bool else omit }}"
   run_once: "{{ download_run_once|bool }}"
 
 - name: Fix permissions
@@ -42,6 +45,7 @@
     owner: "{{ download.owner|default(omit) }}"
     mode: "{{ download.mode|default(omit) }}"
   when: "{{ download.enabled|bool and not download.container|bool and (download.unarchive is not defined or download.unarchive == False) }}"
+  delegate_to: "{{ groups['kube-master'][0] if download_run_once|bool else omit }}"
   run_once: "{{ download_run_once|bool }}"
 
 - name: pulling...
@@ -49,10 +53,9 @@
     msg: "{{ download.repo }}:{{ download.tag }}"
   when: "{{ download.enabled|bool and download.container|bool }}"
 
-- name: Create dest directory for container images to be saved
+- name: Create dest directory for saved/loaded container images
   file: path="{{local_release_dir}}/containers" state=directory recurse=yes
   when: "{{ download.enabled|bool and download.container|bool }}"
-  run_once: "{{ download_run_once|bool }}"
 
 #NOTE(bogdando) this brings no docker-py deps for nodes
 - name: Download containers
@@ -62,4 +65,29 @@
   retries: 4
   delay: "{{ 20 | random + 3 }}"
   when: "{{ download.enabled|bool and download.container|bool }}"
+  delegate_to: "{{ groups['kube-master'][0] if download_run_once|bool else omit }}"
   run_once: "{{ download_run_once|bool }}"
+
+- set_fact:
+    fname: "{{local_release_dir}}/containers/{{download.repo|regex_replace('/|\0|:', '_')}}:{{download.tag|regex_replace('/|\0|:', '_')}}.tar"
+
+- name: Download | save container images
+  shell: docker save "{{ download.repo }}:{{ download.tag }}" > "{{ fname }}"
+  delegate_to: "{{groups['kube-master'][0]}}"
+  run_once: true
+  when: ansible_os_family != "CoreOS" and download_run_once|bool
+
+- name: Download | get container images
+  synchronize:
+    src: "{{ fname }}"
+    dest: "{{local_release_dir}}/containers"
+    mode: push
+  register: get_task
+  until: get_task|success
+  retries: 4
+  delay: "{{ 20 | random + 3 }}"
+  when: ansible_os_family != "CoreOS" and inventory_hostname != groups['kube-master'][0] and download_run_once|bool
+
+- name: Download | load container images
+  shell: docker load < "{{ fname }}"
+  when: ansible_os_family != "CoreOS" and inventory_hostname != groups['kube-master'][0] and download_run_once|bool