Drop support for RHEL 7 / CentOS 7 (#11246)

* Simplify docker systemd unit

systemd handles missing unit by ignoring the dependency so we don't need
to template them.

* Remove RHEL 7/CentOS 7 support

- remove ref in kubespray roles
- move CI from centos 7 to 8
- remove docs related to centos7

* Remove container-storage-setup

Only used for RHEL 7 and CentOS 7

roles/container-engine/docker-storage/defaults/main.yml

@@ -1,19 +0,0 @@
----
-docker_container_storage_setup_repository: https://github.com/projectatomic/container-storage-setup.git
-docker_container_storage_setup_version: v0.6.0
-docker_container_storage_setup_profile_name: kubespray
-docker_container_storage_setup_storage_driver: devicemapper
-docker_container_storage_setup_container_thinpool: docker-pool
-# It must be define a disk path for docker_container_storage_setup_devs.
-# Otherwise docker-storage-setup will be executed incorrectly.
-# docker_container_storage_setup_devs: /dev/vdb
-docker_container_storage_setup_data_size: 40%FREE
-docker_container_storage_setup_min_data_size: 2G
-docker_container_storage_setup_chunk_size: 512K
-docker_container_storage_setup_growpart: "false"
-docker_container_storage_setup_auto_extend_pool: "yes"
-docker_container_storage_setup_pool_autoextend_threshold: 60
-docker_container_storage_setup_pool_autoextend_percent: 20
-docker_container_storage_setup_device_wait_timeout: 60
-docker_container_storage_setup_wipe_signatures: "false"
-docker_container_storage_setup_container_root_lv_size: 40%FREE

roles/container-engine/docker-storage/files/install_container_storage_setup.sh

@@ -1,23 +0,0 @@
-#!/bin/sh
-
-set -e
-
-repository=${1:-https://github.com/projectatomic/container-storage-setup.git}
-version=${2:-master}
-profile_name=${3:-kubespray}
-dir=`mktemp -d`
-export GIT_DIR=$dir/.git
-export GIT_WORK_TREE=$dir
-
-git init
-git fetch --depth 1 $repository $version
-git merge FETCH_HEAD
-make -C $dir install
-rm -rf /var/lib/container-storage-setup/$profile_name $dir
-
-set +e
-
-/usr/bin/container-storage-setup create $profile_name /etc/sysconfig/docker-storage-setup && /usr/bin/container-storage-setup activate $profile_name
-# FIXME: exit status can be 1 for both fatal and non fatal errors in current release,
-# could be improved by matching error strings
-exit 0

roles/container-engine/docker-storage/tasks/main.yml

@@ -1,48 +0,0 @@
----
-
-- name: Docker-storage-setup | install git and make
-  with_items: [git, make]
-  package:
-    pkg: "{{ item }}"
-    state: present
-
-- name: Docker-storage-setup | docker-storage-setup sysconfig template
-  template:
-    src: docker-storage-setup.j2
-    dest: /etc/sysconfig/docker-storage-setup
-    mode: "0644"
-
-- name: Docker-storage-override-directory | docker service storage-setup override dir
-  file:
-    dest: /etc/systemd/system/docker.service.d
-    mode: "0755"
-    owner: root
-    group: root
-    state: directory
-
-- name: Docker-storage-override | docker service storage-setup override file
-  copy:
-    dest: /etc/systemd/system/docker.service.d/override.conf
-    content: |-
-      ### This file is managed by Ansible
-      [Service]
-      EnvironmentFile=-/etc/sysconfig/docker-storage
-
-    owner: root
-    group: root
-    mode: "0644"
-
-# https://docs.docker.com/engine/installation/linux/docker-ce/centos/#install-using-the-repository
-- name: Docker-storage-setup | install lvm2
-  package:
-    name: lvm2
-    state: present
-
-- name: Docker-storage-setup | install and run container-storage-setup
-  become: true
-  script: |
-    install_container_storage_setup.sh \
-      {{ docker_container_storage_setup_repository }} \
-      {{ docker_container_storage_setup_version }} \
-      {{ docker_container_storage_setup_profile_name }}
-  notify: Docker | reload systemd

roles/container-engine/docker-storage/templates/docker-storage-setup.j2

@@ -1,35 +0,0 @@
-{%if docker_container_storage_setup_storage_driver is defined%}STORAGE_DRIVER={{docker_container_storage_setup_storage_driver}}{%endif%}
-
-{%if docker_container_storage_setup_extra_storage_options is defined%}EXTRA_STORAGE_OPTIONS={{docker_container_storage_setup_extra_storage_options}}{%endif%}
-
-{%if docker_container_storage_setup_devs is defined%}DEVS={{docker_container_storage_setup_devs}}{%endif%}
-
-{%if docker_container_storage_setup_container_thinpool is defined%}CONTAINER_THINPOOL={{docker_container_storage_setup_container_thinpool}}{%endif%}
-
-{%if docker_container_storage_setup_vg is defined%}VG={{docker_container_storage_setup_vg}}{%endif%}
-
-{%if docker_container_storage_setup_root_size is defined%}ROOT_SIZE={{docker_container_storage_setup_root_size}}{%endif%}
-
-{%if docker_container_storage_setup_data_size is defined%}DATA_SIZE={{docker_container_storage_setup_data_size}}{%endif%}
-
-{%if docker_container_storage_setup_min_data_size is defined%}MIN_DATA_SIZE={{docker_container_storage_setup_min_data_size}}{%endif%}
-
-{%if docker_container_storage_setup_chunk_size is defined%}CHUNK_SIZE={{docker_container_storage_setup_chunk_size}}{%endif%}
-
-{%if docker_container_storage_setup_growpart is defined%}GROWPART={{docker_container_storage_setup_growpart}}{%endif%}
-
-{%if docker_container_storage_setup_auto_extend_pool is defined%}AUTO_EXTEND_POOL={{docker_container_storage_setup_auto_extend_pool}}{%endif%}
-
-{%if docker_container_storage_setup_pool_autoextend_threshold is defined%}POOL_AUTOEXTEND_THRESHOLD={{docker_container_storage_setup_pool_autoextend_threshold}}{%endif%}
-
-{%if docker_container_storage_setup_pool_autoextend_percent is defined%}POOL_AUTOEXTEND_PERCENT={{docker_container_storage_setup_pool_autoextend_percent}}{%endif%}
-
-{%if docker_container_storage_setup_device_wait_timeout is defined%}DEVICE_WAIT_TIMEOUT={{docker_container_storage_setup_device_wait_timeout}}{%endif%}
-
-{%if docker_container_storage_setup_wipe_signatures is defined%}WIPE_SIGNATURES={{docker_container_storage_setup_wipe_signatures}}{%endif%}
-
-{%if docker_container_storage_setup_container_root_lv_name is defined%}CONTAINER_ROOT_LV_NAME={{docker_container_storage_setup_container_root_lv_name}}{%endif%}
-
-{%if docker_container_storage_setup_container_root_lv_size is defined%}CONTAINER_ROOT_LV_SIZE={{docker_container_storage_setup_container_root_lv_size}}{%endif%}
-
-{%if docker_container_storage_setup_container_root_lv_mount_path is defined%}CONTAINER_ROOT_LV_MOUNT_PATH={{docker_container_storage_setup_container_root_lv_mount_path}}{%endif%}

roles/container-engine/docker/meta/main.yml

@@ -1,5 +1,3 @@
 ---
 dependencies:
   - role: container-engine/containerd-common
-  - role: container-engine/docker-storage
-    when: docker_container_storage_setup and ansible_os_family == "RedHat"

roles/container-engine/docker/templates/docker.service.j2

@@ -1,19 +1,11 @@
 [Unit]
 Description=Docker Application Container Engine
 Documentation=http://docs.docker.com
-{% if ansible_os_family == "RedHat" %}
-After=network.target {{ ' docker-storage-setup.service' if docker_container_storage_setup else '' }} containerd.service
+After=network.target docker.socket containerd.service lvm2-monitor.service SuSEfirewall2.service
+{% if ansible_os_family != "Suse" %}
 BindsTo=containerd.service
-{{ 'Wants=docker-storage-setup.service' if docker_container_storage_setup else '' }}
-{% elif ansible_os_family == "Debian" %}
-After=network.target docker.socket containerd.service
-BindsTo=containerd.service
-Wants=docker.socket
-{% elif ansible_os_family == "Suse" %}
-After=network.target lvm2-monitor.service SuSEfirewall2.service
-# After=network.target containerd.service
-# BindsTo=containerd.service
 {% endif %}
+Wants=docker.socket
 
 [Service]
 Type=notify