Mark Goddard 48aea5637f Support Docker CE in bootstrap-servers
Kolla Ansible's bootstrap-servers command provides support for
installing the Docker engine. This is currently done using the packages
at https://apt.dockerproject.org and https://yum.dockerproject.org.
These packages are outdated, with the most recent packages from May 2017
- docker-engine-17.05.

The source for up to date docker packages is
https://download.docker.com, which was introduced with the move to
Docker Community Edition (CE) and Docker Enterprise Edition (EE).

This change adds support to bootstrap-servers for Docker CE for CentOS
and Ubuntu.

It also adds a new variable, 'enable_docker_repo', which controls
whether a package repository for Docker will be enabled.

It also adds a new variable, 'docker_legacy_packages', which controls
whether the legacy packages at dockerproject.org will be used or the
newer packages at docker.com. The default value for this variable is
'false', meaning to use Docker CE.

Upgrading from docker-engine to docker-ce has been tested on CentOS 7.5
and Ubuntu 16.04, by running 'kolla-ansible bootstrap-servers' with
'docker_legacy_packages' set to 'false'. The upgrades were successful,
but result in all containers being stopped. For this reason, the
bootstrap-servers command checks running containers prior to upgrading
packages, and ensures they are running after the package upgrade is
complete.

As mentioned in the release note, care should be taken when upgrading
Docker with clustered services, which could lose quorum. To avoid this,
use --serial or --limit to apply the change in batches.

Change-Id: I6dfd375c868870f8646ef1a8f02c70812e8f6271
Implements: blueprint docker-ce
2018-12-17 14:04:43 +00:00

152 lines
3.7 KiB
YAML

---
- name: Update apt cache
apt:
update_cache: yes
become: True
when: ansible_os_family == 'Debian'
- name: Update yum cache
yum:
update_cache: yes
become: True
when: ansible_os_family == 'RedHat'
# TODO(inc0): Gates don't seem to have ufw executable, check for it instead of ignore errors
- name: Set firewall default policy
become: True
ufw:
state: disabled
policy: allow
when: ansible_os_family == 'Debian'
ignore_errors: yes
- name: Check if firewalld is installed
command: rpm -q firewalld
register: firewalld_check
failed_when: firewalld_check.rc > 1
when: ansible_os_family == 'RedHat'
- name: Disable firewalld
become: True
service:
name: "{{ item }}"
enabled: false
state: stopped
with_items:
- firewalld
when:
- ansible_os_family == 'RedHat'
- firewalld_check.rc == 0
# Upgrading docker engine may cause containers to stop. Take a snapshot of the
# running containers prior to a potential upgrade of Docker.
- name: Check which containers are running
command: docker ps -f 'status=running' -q
become: true
# If Docker is not installed this command may exit non-zero.
failed_when: false
changed_when: false
register: running_containers
- name: Install apt packages
package:
name: "{{ item }}"
state: present
become: True
with_items: "{{ debian_pkg_install }}"
when: ansible_os_family == 'Debian'
register: apt_install_result
- name: Install deltarpm packages
package:
name: "{{ item }}"
state: present
become: True
with_items:
- deltarpm
when: ansible_os_family == 'RedHat'
- name: Install yum packages
package:
name: "{{ item }}"
state: present
become: True
with_items: "{{ redhat_pkg_install }}"
when: ansible_os_family == 'RedHat'
register: yum_install_result
# If any packages were updated, and any containers were running, wait for the
# daemon to come up and start all previously running containers.
- block:
- name: Wait for Docker to start
command: docker info
become: true
changed_when: false
register: result
until: result is success
retries: 6
delay: 10
- name: Ensure containers are running after Docker upgrade
command: "docker start {{ running_containers.stdout }}"
become: true
when:
- install_result is changed
- running_containers.rc == 0
- running_containers.stdout != ''
vars:
install_result: "{{ yum_install_result if ansible_os_family == 'RedHat' else apt_install_result }}"
- name: Install virtualenv packages
package:
name: python-virtualenv
state: present
become: True
when: virtualenv is not none
- name: Install pip
easy_install:
name: pip
virtualenv: "{{ virtualenv is none | ternary(omit, virtualenv) }}"
virtualenv_site_packages: "{{ virtualenv is none | ternary(omit, virtualenv_site_packages) }}"
become: True
- name: Install latest pip in the virtualenv
pip:
name: pip
state: latest
virtualenv: "{{ virtualenv }}"
virtualenv_site_packages: "{{ virtualenv_site_packages }}"
become: True
when: virtualenv is not none
- name: Install docker SDK for python
pip:
name: docker
state: latest
virtualenv: "{{ virtualenv is none | ternary(omit, virtualenv) }}"
virtualenv_site_packages: "{{ virtualenv is none | ternary(omit, virtualenv_site_packages) }}"
become: True
- name: Remove packages
package:
name: "{{ item }}"
state: absent
with_items: "{{ ubuntu_pkg_removals }}"
become: True
when:
- ansible_distribution|lower == "ubuntu"
- item != ""
- name: Remove packages
package:
name: "{{ item }}"
state: absent
with_items: "{{ redhat_pkg_removals }}"
become: True
when:
- ansible_os_family == 'RedHat'
- item != ""