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RHEL7x_Install-Docker-playbook.yml
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RHEL7x_Install-Docker-playbook.yml
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---
################################################################################
# description: Installs Docker on RHEL7x
# usage: ansible-playbook RHEL7x_Install-Docker-playbook.yml --extra-vars 'HostOrGroup=YourServerOrGroupNameGoesHere'
# author: Ernest G. Wilson II <ErnestGWilsonII@gmail.com> (https://github.com/ernestgwilsonii)
# license: MIT
################################################################################
# Ansible Playbook options
# REF: http://docs.ansible.com/ansible/playbooks.html
#####################################################
- name: Install Docker on RHEL7x
hosts: "{{ HostOrGroup|default ('FATAL ERROR --> HostOrGroup NOT SET! You must specify either a Host or a Group name!') }}"
serial: "100%"
gather_facts: False
tasks:
# Install or configure repository used on the OS by yum
# REF: https://docs.ansible.com/ansible/yum_repository_module.html
##################################################################
# /etc/yum.repos.d/docker.repo
- name: Install repository dockerrepo
yum_repository:
name: dockerrepo
description: Docker Repository
file: docker
baseurl: https://yum.dockerproject.org/repo/main/centos/7
enabled: yes
gpgcheck: yes
gpgkey: https://yum.dockerproject.org/gpg
# Install yum packages
# REF: http://docs.ansible.com/ansible/yum_module.html
######################################################
- name: Install docker-engine
yum:
name=docker-engine
state=latest
# Set attributes of files
# REF: http://docs.ansible.com/ansible/file_module.html
#######################################################
- name: Create a blank Docker environment file if it does not exist - touch /etc/sysconfig/docker
file:
path=/etc/sysconfig/docker
state=touch
mode=0644
# Update various configuration files
# REF: http://docs.ansible.com/ansible/lineinfile_module.html
#############################################################
# Populate values in /etc/sysconfig/docker
- name: Populate values in /etc/sysconfig/docker with - OPTIONS=--bip=172.19.0.1/16
lineinfile:
dest=/etc/sysconfig/docker
state=present
line='OPTIONS=--bip=172.19.0.1/16'
# Note: The default bridge interface for Docker is 172.17.0.1/16
# Tweak settings in INI files
# REF: http://docs.ansible.com/ansible/ini_file_module.html1
############################################################
# Set values in /etc/systemd/system/docker.service
- name: Specify ExecStart value under Service section in /etc/systemd/system/docker.service
ini_file:
dest=/etc/systemd/system/docker.service
section=Service
option=ExecStart
value='/usr/bin/docker daemon -H tcp://0.0.0.0:2376 -H unix:///var/run/docker.sock --storage-driver devicemapper --tlsverify --tlscacert /etc/docker/ca.pem --tlscert /etc/docker/server.pem --tlskey /etc/docker/server-key.pem --label provider=generic $OPTIONS'
# Set values in /etc/systemd/system/docker.service
- name: Specify EnvironmentFile value under Service section in /etc/systemd/system/docker.service
ini_file:
dest=/etc/systemd/system/docker.service
section=Service
option=EnvironmentFile
value='/etc/sysconfig/docker'
# Restart firewalld to make sure it is running OK before changing any rules
# REF: http://docs.ansible.com/ansible/service_module.html
##########################################################
- name: Ensure the firewalld service is enabled and re-started before changing any rules
service:
name=firewalld
enabled=yes
state=restarted
# Update the firewalld configuration
# REF: http://docs.ansible.com/ansible/firewalld_module.html
############################################################
- name: Update firewall to allow port TCP 2375 for incoming Docker Cloud connections
firewalld:
port=2375/tcp
permanent=true
immediate=yes
state=enabled
zone=public
- name: Update firewall to allow port TCP 2376 for incoming docker-machine connections
firewalld:
port=2376/tcp
permanent=true
immediate=yes
state=enabled
zone=public
- name: Update firewall to allow port TCP 2377 for incoming Docker cluster management connections
firewalld:
port=2377/tcp
permanent=true
immediate=yes
state=enabled
zone=public
- name: Update firewall to allow port TCP 4789 for incoming Docker overlay network connections
firewalld:
port=4789/tcp
permanent=true
immediate=yes
state=enabled
zone=public
- name: Update firewall to allow port UDP 4789 for incoming Docker overlay network connections
firewalld:
port=4789/udp
permanent=true
immediate=yes
state=enabled
zone=public
- name: Update firewall to allow port TCP 6783 for incoming Docker overlay network connections
firewalld:
port=6783/tcp
permanent=true
immediate=yes
state=enabled
zone=public
- name: Update firewall to allow port UDP 6783 for incoming Docker overlay network connections
firewalld:
port=6783/udp
permanent=true
immediate=yes
state=enabled
zone=public
- name: Update firewall to allow port TCP 7946 for incoming Docker communication among nodes
firewalld:
port=7946/tcp
permanent=true
immediate=yes
state=enabled
zone=public
- name: Update firewall to allow port UDP 7946 for incoming Docker communication among nodes
firewalld:
port=7946/udp
permanent=true
immediate=yes
state=enabled
zone=public
- name: Update firewall to allow ports TCP 30000-32767 for incoming Docker swarm manager PublishedPort connections
firewalld:
port=30000-32767/tcp
permanent=true
immediate=yes
state=enabled
zone=public
# Enable and start docker
# REF: http://docs.ansible.com/ansible/service_module.html
##########################################################
- name: Enable and start the docker service
service:
name=docker
enabled=yes
state=restarted
# Note: Verify docker via SSH command line:
# systemctl status docker
# docker run hello-world
#
# More advanced verification:
# docker run -it ubuntu bash
# cat /etc/lsb-release
#
# To run docker as a normal user, add that user to the docker group:
# usermod -aG docker your_username
# get_url - Downloads files from HTTP, HTTPS, or FTP to node
# REF: http://docs.ansible.com/ansible/get_url_module.html
############################################################
- name: Download docker-machine
get_url:
url=https://github.com/docker/machine/releases/download/v0.7.0/docker-machine-Linux-x86_64
dest=/usr/local/bin/docker-machine
mode=777