swapon and docker for CentOS

defaults/main.yml

@@ -11,3 +11,4 @@ china_mirror: false
 install_docker: false
 upgrade: false
 reboot: false
+pip_executable: pip

tasks/docker.yml

@@ -2,21 +2,54 @@
   set_fact:
     mirror_docker: https://mirrors.tuna.tsinghua.edu.cn/docker-ce
   when: "china_mirror"
-- name: Docker 源公钥
+- name: Docker apt 源公钥
   become: true
   apt_key:
     url: '{{mirror_docker}}/linux/{{ ansible_distribution|lower }}/gpg'
-- name: Docker 源
+  when: ansible_os_family == 'Debian'
+- name: Docker apt 源
   become: true
   apt_repository:
     repo: 'deb [arch=amd64] {{mirror_docker}}/linux/{{ ansible_distribution|lower }} {{ ansible_distribution_release }} stable'
     filename: docker
-- name: 安装 Docker
+  when: ansible_os_family == 'Debian'
+- name: 安装 Docker (apt)
   become: true
   apt:
     name: docker-ce,python-backports-shutil-get-terminal-size,python-backports.ssl-match-hostname,python-pip
     update_cache: yes
     state: latest
+  when: ansible_os_family == 'Debian'
+- name: docker yum 源
+  become: true
+  yum_repository:
+    name: docker-ce
+    description: docker-ce
+    baseurl: '{{mirror_docker}}/linux/{{ ansible_distribution|lower }}/{{ansible_distribution_major_version}}/$basearch/stable'
+    ip_resolve: 4
+    gpgkey: '{{mirror_docker}}/linux/{{ ansible_distribution|lower }}/gpg'
+  when: ansible_os_family == "RedHat" and ansible_distribution_major_version|int != 8
+- name: docker yum 源 (CentOS 8)
+  become: true
+  yum_repository:
+    name: docker-ce
+    description: docker-ce
+    baseurl: '{{mirror_docker}}/linux/centos/7/$basearch/stable'
+    ip_resolve: 4
+    gpgkey: '{{mirror_docker}}/linux/7/gpg'
+  when: ansible_os_family == "RedHat" and ansible_distribution_major_version|int == 8
+- name: containerd.io
+  become: true
+  dnf:
+    name: '{{mirror_docker}}/linux/centos/7/x86_64/stable/Packages/containerd.io-1.2.6-3.3.el7.x86_64.rpm'
+  when: ansible_os_family == "RedHat" and ansible_distribution_major_version|int == 8
+- name: 安装 Docker (yum)
+  become: true
+  yum:
+    name: python3-pip,docker-ce,docker-ce-cli,containerd.io
+    update_cache: yes
+    state: latest
+  when: ansible_os_family == 'RedHat'
 - name: docker user group
   become: true
   user:
@@ -31,24 +64,36 @@
 - name: docker-compose 清理 easy install
   become: true
   file:
-    path: /usr/local/lib/python2.7/dist-packages/easy-install.pth
+    path: '/usr/local/lib/python{{item}}/dist-packages/easy-install.pth'
     state: absent
+  with_items:
+    - 2.7
+    - 3.5
+    - 3.6
+    - 3.7
+- name: 'pip3 for RedHat'
+  set_fact:
+    pip_executable: pip3
+  when: ansible_os_family == 'RedHat'
 - name: docker-compose pip
   become: true
   pip:
     name: pip
+    executable: '{{pip_executable}}'
     state: latest
   when: "not china_mirror"
 - name: docker-compose
   become: true
   pip:
     name: docker-compose
+    executable: '{{pip_executable}}'
     state: latest
   when: "not china_mirror"
 - name: docker-compose 国内
   become: true
   pip:
     name: pip
+    executable: '{{pip_executable}}'
     state: latest
     extra_args: -i https://mirrors.aliyun.com/pypi/simple/
   when: "china_mirror"
@@ -56,6 +101,7 @@
   become: true
   pip:
     name: docker-compose
+    executable: '{{pip_executable}}'
     state: latest
     extra_args: -i https://mirrors.aliyun.com/pypi/simple/
   when: "china_mirror"

tasks/main.yml

@@ -5,6 +5,12 @@
   with_items:
     - utility
     - sshd_config
+- name: detect swap
+  shell: 'swapon'
+  register: swap_result
+- name: add swap
+  include_tasks: 'swapon.yml'
+  when: 'ansible_memtotal_mb < 1024 and not swap_result.stdout'
 - name: upgrade
   include_tasks: 'upgrade.yml'
   when: "upgrade"
@@ -24,7 +30,7 @@
   when: "ansible_os_family == 'RedHat'"
 - name: docker
   include_tasks: docker.yml
-  when: "ansible_os_family == 'Debian' and install_docker"
+  when: "install_docker"
 - name: fish
   include_tasks: fish.yml
   when: "ansible_os_family == 'Debian'" # RedHat has too many problems on fish, so aborted

tasks/swapon.yml

+---
+- name: make swap
+  become: true
+  shell: "fallocate -l 1G /swapfile || dd if=/dev/zero of=/swapfile bs=1M count=1024 ; chmod 600 /swapfile ; mkswap /swapfile ; swapon /swapfile"
+  args:
+    creates: /swapfile
+- name: swap fstab
+  become: true
+  lineinfile:
+    path: /etc/fstab
+    line: '/swapfile none swap defaults 0 0'
+    insertafter: 'EOF'