Merge pull request #2921 from elementyang/index-out-of-range-pr

fix template index out of range for pull images

roles/download/tasks/set_docker_image_facts.yml

@@ -9,7 +9,7 @@
 
 - name: Register docker images info
   raw: >-
-    {{ docker_bin_dir }}/docker images -q | xargs {{ docker_bin_dir }}/docker inspect -f "{{ '{{' }} (index .RepoTags 0) {{ '}}' }},{{ '{{' }} (index .RepoDigests 0) {{ '}}' }}" | tr '\n' ','
+    {{ docker_bin_dir }}/docker images -q | xargs {{ docker_bin_dir }}/docker inspect -f "{{ '{{' }} if .RepoTags {{ '}}' }}{{ '{{' }} (index .RepoTags 0) {{ '}}' }}{{ '{{' }} end {{ '}}' }}{{ '{{' }} if .RepoDigests {{ '}}' }},{{ '{{' }} (index .RepoDigests 0) {{ '}}' }}{{ '{{' }} end {{ '}}' }}" | tr '\n' ','
   no_log: true
   register: docker_images
   failed_when: false