Decrease docker dependency (#7172)

roles/download/defaults/main.yml

@@ -553,15 +553,6 @@ dashboard_image_tag: "v2.1.0"
 dashboard_metrics_scraper_repo: "{{ docker_image_repo }}/kubernetesui/metrics-scraper"
 dashboard_metrics_scraper_tag: "v1.0.6"
 
-image_pull_command: "{{ docker_bin_dir }}/docker pull"
-image_save_command: "{{ docker_bin_dir }}/docker save {{ image_reponame }} | gzip -{{ download_compress }} > {{ image_path_final }}"
-image_load_command: "{{ docker_bin_dir }}/docker load < {{ image_path_final }}"
-image_info_command: "{{ docker_bin_dir }}/docker images -q | xargs {{ docker_bin_dir }}/docker inspect -f \"{{ '{{' }} if .RepoTags {{ '}}' }}{{ '{{' }} (join .RepoTags \\\",\\\") {{ '}}' }}{{ '{{' }} end {{ '}}' }}{{ '{{' }} if .RepoDigests {{ '}}' }},{{ '{{' }} (join .RepoDigests \\\",\\\") {{ '}}' }}{{ '{{' }} end {{ '}}' }}\" | tr '\n' ','"
-
-image_pull_command_on_localhost: "{{ docker_bin_dir }}/docker pull"
-image_save_command_on_localhost: "{{ docker_bin_dir }}/docker save {{ image_reponame }} | gzip -{{ download_compress }} > {{ image_path_cached }}"
-image_info_command_on_localhost: "{{ docker_bin_dir }}/docker images"
-
 metallb_speaker_image_repo: "{{ quay_image_repo }}/metallb/speaker"
 metallb_controller_image_repo: "{{ quay_image_repo }}/metallb/controller"
 

roles/download/tasks/check_pull_required.yml

 ---
-# NOTE: The ampersand hell in this block is needed because docker-inspect uses go templates,
-# which uses double ampersands as delimiters, just like Jinja does. If you want to understand
-# the template, just replace all instances  of {{ `{{` }} with {{ and {{ '}}' }} with }}.
-# It will output something like the following:
+# The image_info_command depends on the Container Runtime and will output something like the following:
 # nginx:1.15,gcr.io/google-containers/kube-proxy:v1.14.1,gcr.io/google-containers/kube-proxy@sha256:44af2833c6cbd9a7fc2e9d2f5244a39dfd2e31ad91bf9d4b7d810678db738ee9,gcr.io/google-containers/kube-apiserver:v1.14.1,etc...
 - name: check_pull_required |  Generate a list of information about the images on a node  # noqa 305 image_info_command contains a pipe, therefore requiring shell
   shell: "{{ image_info_command }}"

roles/download/tasks/prep_download.yml

@@ -5,13 +5,27 @@
   tags:
     - facts
 
-- name: prep_download | Set image info command for containerd and crio
+# The docker image_info_command might seems weird but we are using raw/endraw and `{{ `{{` }}` to manage the double jinja2 processing
+# done here and when `image_info_command` is used (first the raw/endraw allow to store the command, then the second processing replace `{{`
+- name: prep_download | Set image pull/info command for docker
+  set_fact:
+    image_pull_command: "{{ docker_bin_dir }}/docker pull"
+    image_info_command: "{{ docker_bin_dir }}/docker images -q | xargs -i {{ '{{' }} docker_bin_dir }}/docker inspect -f {% raw %}'{{ '{{' }} if .RepoTags }}{{ '{{' }} join .RepoTags \",\" }}{{ '{{' }} end }}{{ '{{' }} if .RepoDigests }},{{ '{{' }} join .RepoDigests \",\" }}{{ '{{' }} end }}' {% endraw %} {} | tr '\n' ','"
+  when: container_manager == 'docker'
+
+- name: prep_download | Set image pull/info command for containerd and crio
   set_fact:
     image_info_command: "{{ bin_dir }}/crictl images --verbose | awk -F ': ' '/RepoTags|RepoDigests/ {print $2}' | tr '\n' ','"
     image_pull_command: "{{ bin_dir }}/crictl pull"
   when: container_manager in ['crio' ,'containerd']
 
-- name: prep_download | Set image info command for containerd and crio on localhost
+- name: prep_download | Set image pull/info command for docker on localhost
+  set_fact:
+    image_pull_command_on_localhost: "{{ docker_bin_dir }}/docker pull"
+    image_info_command_on_localhost: "{{ docker_bin_dir }}/docker images"
+  when: container_manager_on_localhost == 'docker'
+
+- name: prep_download | Set image pull/info command for containerd and crio on localhost
   set_fact:
     image_info_command_on_localhost: "{{ bin_dir }}/crictl images --verbose | awk -F ': ' '/RepoTags|RepoDigests/ {print $2}' | tr '\n' ','"
     image_pull_command_on_localhost: "{{ bin_dir }}/crictl pull"
@@ -32,7 +46,7 @@
     - localhost
     - asserts
 
-- name: prep_download | On localhost, check if user has access to docker without using sudo
+- name: prep_download | On localhost, check if user has access to the container runtime without using sudo
   shell: "{{ image_info_command_on_localhost }}"  # noqa 305 image_info_command_on_localhost contains pipe, therefore requires shell
   delegate_to: localhost
   connection: local

roles/download/tasks/set_container_facts.yml

@@ -22,6 +22,12 @@
     image_path_cached: "{{ download_cache_dir }}/images/{{ image_filename }}"
     image_path_final: "{{ local_release_dir }}/images/{{ image_filename }}"
 
+- name: Set image save/load command for docker
+  set_fact:
+    image_save_command: "{{ docker_bin_dir }}/docker save {{ image_reponame }} | gzip -{{ download_compress }} > {{ image_path_final }}"
+    image_load_command: "{{ docker_bin_dir }}/docker load < {{ image_path_final }}"
+  when: container_manager == 'docker'
+
 - name: Set image save/load command for containerd
   set_fact:
     image_save_command: "{{ containerd_bin_dir }}/ctr -n k8s.io image export {{ image_path_final }} {{ image_reponame }}"
@@ -34,6 +40,11 @@
     image_load_command: "skopeo copy docker-archive:{{ image_path_final }} containers-storage:{{ image_reponame }}"
   when: container_manager == 'crio'
 
+- name: Set image save/load command for docker on localhost
+  set_fact:
+    image_save_command_on_localhost: "{{ docker_bin_dir }}/docker save {{ image_reponame }} | gzip -{{ download_compress }} > {{ image_path_cached }}"
+  when: container_manager_on_localhost == 'docker'
+
 - name: Set image save/load command for containerd on localhost
   set_fact:
     image_save_command_on_localhost: "{{ containerd_bin_dir }}/ctr -n k8s.io image export {{ image_path_cached }} {{ image_reponame }}"

roles/kubernetes/node/tasks/install.yml

@@ -21,8 +21,26 @@
     - upgrade
   notify: Node | restart kubelet
 
-- name: install | Copy socat wrapper for Container Linux
+- name: install | Copy socat wrapper for Container Linux with Docker
   command: "{{ docker_bin_dir }}/docker run --rm -v {{ bin_dir }}:/opt/bin {{ install_socat_image_repo }}:{{ install_socat_image_tag }}"
   args:
     creates: "{{ bin_dir }}/socat"
-  when: ansible_os_family in ['Flatcar Container Linux by Kinvolk']
+  when:
+    - ansible_os_family in ['Flatcar Container Linux by Kinvolk']
+    - container_manager == "docker"
+
+- name: install | Copy socat wrapper for Container Linux with Containerd
+  command: "{{ containerd_bin_dir }}/ctr run --rm --mount type=bind,src={{ bin_dir }},dst=/opt/bin,options=rbind:rw {{ install_socat_image_repo }}:{{ install_socat_image_tag }}"
+  args:
+    creates: "{{ bin_dir }}/socat"
+  when:
+    - ansible_os_family in ['Flatcar Container Linux by Kinvolk']
+    - container_manager == "containerd"
+
+- name: install | Copy socat wrapper for Container Linux with crio
+  command: "podman run --rm --mount type=bind,source={{ bin_dir }},destination=/opt/bin,rw=true {{ install_socat_image_repo }}:{{ install_socat_image_tag }}"
+  args:
+    creates: "{{ bin_dir }}/socat"
+  when:
+    - ansible_os_family in ['Flatcar Container Linux by Kinvolk']
+    - container_manager == "crio"

roles/network_plugin/calico/handlers/main.yml

@@ -4,22 +4,22 @@
   when: calico_cni_config is defined
   notify:
     - delete 10-calico.conflist
-    - docker | delete calico-node containers
-    - containerd | delete calico-node containers
+    - Calico | delete calico-node docker containers
+    - Calico | delete calico-node crio/containerd containers
 
 - name: delete 10-calico.conflist
   file:
     path: /etc/cni/net.d/10-calico.conflist
     state: absent
 
-- name: docker | delete calico-node containers
+- name: Calico | delete calico-node docker containers
   shell: "{{ docker_bin_dir }}/docker ps -af name=k8s_POD_calico-node* -q | xargs --no-run-if-empty {{ docker_bin_dir }}/docker rm -f"
   register: docker_calico_node_remove
   until: docker_calico_node_remove is succeeded
   retries: 5
   when: container_manager in ["docker"]
 
-- name: containerd | delete calico-node containers
+- name: Calico | delete calico-node crio/containerd containers
   shell: '{{ bin_dir }}/crictl pods --name calico-node-* -q | xargs -I% --no-run-if-empty bash -c "{{ bin_dir }}/crictl stopp % && {{ bin_dir }}/crictl rmp %"'
   register: crictl_calico_node_remove
   until: crictl_calico_node_remove is succeeded

roles/network_plugin/kube-router/handlers/main.yml

@@ -2,17 +2,17 @@
 - name: reset_kube_router
   command: /bin/true
   notify:
-    - docker | delete kube-router containers
-    - containerd | delete kube-router containers
+    - Kube-router | delete kube-router docker containers
+    - Kube-router | delete kube-router crio/containerd containers
 
-- name: docker | delete kube-router containers
+- name: Kube-router | delete kube-router docker containers
   shell: "{{ docker_bin_dir }}/docker ps -af name=k8s_POD_kube-router* -q | xargs --no-run-if-empty docker rm -f"
   register: docker_kube_router_remove
   until: docker_kube_router_remove is succeeded
   retries: 5
   when: container_manager in ["docker"]
 
-- name: containerd | delete kube-router containers
+- name: Kube-router | delete kube-router crio/containerd containers
   shell: '{{ bin_dir }}/crictl pods --name kube-router* -q | xargs -I% --no-run-if-empty bash -c "{{ bin_dir }}/crictl stopp % && {{ bin_dir }}/crictl rmp %"'
   register: crictl_kube_router_remove
   until: crictl_kube_router_remove is succeeded