refactor: migrate to docker ce (#4)

defaults/main.yml

@@ -1,6 +1,10 @@
 ---
 dockerengine_packages:
-  - docker
+  - docker-ce
+  - docker-ce-cli
+  - containerd.io
+  - docker-buildx-plugin
+  - docker-compose-plugin
 
 # @var dockerengine_packages_extra:description: >
 # The role requires epel repository and pip to work. You can use
@@ -11,9 +15,6 @@ dockerengine_packages_extra: []
 dockerengine_service: docker
 
 dockerengine_docker_group_enabled: False
-dockerengine_secure_registries: []
-dockerengine_insecure_registries: []
-dockerengine_block_registries: []
 
 # @var dockerengine_registries:description: List of docker registries to auto login
 # @var dockerengine_registries:example: >
@@ -30,24 +31,21 @@ dockerengine_registries: []
 # @var dockerengine_https_proxy: $ "_unset"
 # @var dockerengine_no_proxy: $ "_unset_"
 
-# @var dockerengine_storage_pvs: $ "_unset_"
-# @var dockerengine_storage_pvs:example: $ "/dev/sda"
-dockerengine_storage_vg: vg_docker
-dockerengine_storage_lv: lv_docker
-dockerengine_storage_size: 100G
-dockerengine_base_dir: /var/lib/docker
-
-dockerengine_cli_options:
-  - selinux-enabled
-  - log-driver=journald
-  - log-level=info
-  - signature-verification=false
-
 dockerengine_usernamespace_enabled: False
 dockerengine_nsremap_user: dockremap
 dockerengine_nsremap_range_start: 231072
 dockerengine_nsremap_range_length: 65536
 
+dockerengine_daemon_config:
+  - selinux-enabled: False
+  - log-driver: journald
+  - log-level: info
+  - live-restore: True
+
+dockerengine_daemon_config_extra: []
+# dockerengine_daemon_config_extra:
+#   - userns-remap: "{{ dockerengine_nsremap_user +':' + dockerengine_nsremap_user }}"
+
 # @var dockerengine_networks:description: List of additional docker networks to create.
 # @var dockerengine_networks:example: >
 # dockerengine_networks:

tasks/config.yml

@@ -7,24 +7,6 @@
       notify: __docker_restart
       when: dockerengine_docker_group_enabled | bool
 
-    - name: Deploy config files to setup environment
-      template:
-        src: "{{ item.src }}"
-        dest: "{{ item.dest }}"
-        owner: root
-        group: root
-        mode: 0644
-      loop:
-        - src: "etc/sysconfig/docker.j2"
-          dest: "/etc/sysconfig/{{ dockerengine_service }}"
-        - src: "etc/sysconfig/docker-storage-setup.j2"
-          dest: "/etc/sysconfig/{{ dockerengine_service }}-storage-setup"
-        - src: "etc/containers/registries.conf.j2"
-          dest: "/etc/containers/registries.conf"
-      loop_control:
-        label: "{{ item.dest }}"
-      notify: __docker_restart
-
     - name: Add namespace group
       group:
         name: "{{ dockerengine_nsremap_user }}"
@@ -54,6 +36,33 @@
         - /etc/subuid
         - /etc/subgid
 
+    - name: Create required directories
+      loop:
+        - name: /etc/systemd/system/docker.service.d
+          mode: "0755"
+        - name: /etc/docker
+          mode: "0755"
+      loop_control:
+        label: "{{ item.name }}"
+      file:
+        path: "{{ item.name }}"
+        state: directory
+        mode: "{{ item.mode }}"
+
+    - name: Write service override.conf
+      template:
+        src: etc/systemd/system/docker.service.d/override.conf.j2
+        dest: /etc/systemd/system/docker.service.d/override.conf
+        mode: 0644
+      notify: __docker_restart
+
+    - name: Deploy daemon config
+      copy:
+        content: "{{ (dockerengine_daemon_config | combine(dockerengine_daemon_config_extra)) | to_nice_json }}"
+        dest: /etc/docker/daemon.json
+        mode: 0600
+      notify: __docker_restart
+
     - name: Ensure docker engine is up and running
       service:
         name: "{{ dockerengine_service }}"

tasks/install.yml

@@ -1,5 +1,15 @@
 ---
 - block:
+    - name: Add Docker CE repository
+      yum_repository:
+        name: "docker-ce"
+        file: "Docker-CE"
+        description: "Docker CE Stable"
+        baseurl: "https://download.docker.com/linux/centos/{{ ansible_distribution_major_version }}/{{ ansible_architecture }}/stable"
+        gpgcheck: yes
+        enabled: yes
+        gpgkey: "https://download.docker.com/linux/rhel/gpg"
+
     - name: Install dependencies
       package:
         name: "{{ item }}"
@@ -20,6 +30,14 @@
         group: root
         mode: 0755
 
+    - name: Ensure to remove old docker packages
+      package:
+        name:
+          - docker
+          - docker-common
+          - docker-engine
+        state: absent
+
     - name: Install packages
       package:
         name: "{{ item }}"

templates/etc/containers/registries.conf.j2

@@ -1,27 +0,0 @@
-{{ ansible_managed | comment }}
-# This is a system-wide configuration file used to
-# keep track of registries for various container backends.
-# It adheres to TOML format and does not support recursive
-# lists of registries.
-
-# The default location for this configuration file is /etc/containers/registries.conf.
-
-# The only valid categories are: 'registries.search', 'registries.insecure',
-# and 'registries.block'.
-
-[registries.search]
-#registries = ['registry.access.redhat.com']
-registries = [{{ dockerengine_secure_registries | xoxys.general.wrap | join(',') }}]
-
-# If you need to access insecure registries, add the registry's fully-qualified name.
-# An insecure registry is one that does not have a valid SSL certificate or only does HTTP.
-[registries.insecure]
-registries = [{{ dockerengine_insecure_registries | xoxys.general.wrap | join(',') }}]
-
-
-# If you need to block pull access from a registry, uncomment the section below
-# and add the registries fully-qualified name.
-#
-# Docker only
-[registries.block]
-registries = [{{ dockerengine_block_registries | xoxys.general.wrap | join(',') }}]

templates/etc/sysconfig/docker-storage-setup.j2

@@ -1,10 +0,0 @@
-#jinja2: lstrip_blocks: True
-{{ ansible_managed | comment }}
-STORAGE_DRIVER=overlay2
-{% if dockerengine_storage_pvs is defined %}
-DEVS={{ dockerengine_storage_pvs }}
-CONTAINER_ROOT_LV_NAME={{ dockerengine_storage_lv }}
-CONTAINER_ROOT_LV_SIZE={{ dockerengine_storage_size }}
-CONTAINER_ROOT_LV_MOUNT_PATH={{ dockerengine_base_dir }}
-VG={{ dockerengine_storage_vg }}
-{% endif %}

templates/etc/sysconfig/docker.j2

@@ -1,33 +1,5 @@
 {{ ansible_managed | comment }}
-# Modify these options if you want to change the way the docker daemon runs
-OPTIONS='{{ dockerengine_cli_options | xoxys.general.prefix | join(' ') }}{{ ' --userns-remap='+dockerengine_nsremap_user+':'+dockerengine_nsremap_user if dockerengine_usernamespace_enabled | bool else '' }}'
-if [ -z "${DOCKER_CERT_PATH}" ]; then
-    DOCKER_CERT_PATH=/etc/docker
-fi
-
-# Do not add registries in this file anymore. Use /etc/containers/registries.conf
-# from the atomic-registries package.
-#
-
-# On an SELinux system, if you remove the --selinux-enabled option, you
-# also need to turn on the docker_transition_unconfined boolean.
-# setsebool -P docker_transition_unconfined 1
-
-# Location used for temporary files, such as those created by
-# docker load and build operations. Default is /var/lib/docker/tmp
-# Can be overriden by setting the following environment variable.
-# DOCKER_TMPDIR=/var/tmp
-
-# Controls the /etc/cron.daily/docker-logrotate cron job status.
-# To disable, uncomment the line below.
-# LOGROTATE=false
-
-# docker-latest daemon can be used by starting the docker-latest unitfile.
-# To use docker-latest client, uncomment below lines
-#DOCKERBINARY=/usr/bin/docker-latest
-#DOCKERDBINARY=/usr/bin/dockerd-latest
-#DOCKER_CONTAINERD_BINARY=/usr/bin/docker-containerd-latest
-#DOCKER_CONTAINERD_SHIM_BINARY=/usr/bin/docker-containerd-shim-latest
+OPTIONS='{{' --userns-remap=' + dockerengine_nsremap_user + ':' + dockerengine_nsremap_user if dockerengine_usernamespace_enabled | bool else '' }}'
 
 # Proxy settings
 {% if dockerengine_http_proxy is defined %}

templates/etc/systemd/system/docker.service.d/override.conf.j2

@@ -0,0 +1,6 @@
+[Service]
+EnvironmentFile=-/etc/sysconfig/docker
+ExecStart=
+ExecStart=/usr/bin/dockerd -H fd:// \
+    --containerd=/run/containerd/containerd.sock \
+    $OPTIONS