Table of Contents

  1. Overview

  2. Module Description - What the module does and why it is useful

  3. Setup - The basics of getting started with docker_ucp

  4. Usage - Configuration options and additional functionality

  5. Limitations - OS compatibility, etc.

  6. Development - Guide for contributing to the module

Overview

The Docker Universal Control Plane (UCP) module helps with setting up a UCP controller, and joining nodes to it.

Module Description

This module provides a single class, docker_ucp, which uses the official docker/ucp container to bootstrap a UCP controller, or join a node to at existing UCP.

Setup

The module assumes Docker is already installed on the host. If you would like to do that with Puppet look at the Docker module.

You can install the module using the Puppet module tool like so:

puppet module install puppetlabs/docker_ucp

Usage

The included class has two modes of operation:

Installing a Controller

class { 'docker_ucp':
  controller => true,
}

This will install a UCP controller using Docker, with the default admin/orca username and password. Remember to login and change the password once UCP is up and running.

The class takes a number of parameters, depending on your specific setup. Consult the UCP documentation for details of this options.

class { 'docker_ucp':
  controller => true,
  host_address              => ::ipaddress_eth1,
  version                   => '0.8.0',
  usage                     => false,
  tracking                  => false,
  subject_alternative_names => ::ipaddress_eth1,
  external_ca               => false,
  swarm_scheduler           => 'binpack',
  swarm_port                => 19001,
  controller_port           => 19002,
  preserve_certs            => true,
  docker_socket_path        => '/var/run/docker.sock',
  license_file              => '/etc/docker/subscription.lic',
}

Note that license_file option will only work with versions of UCP later than 0.8.0.

Joining a Node to UCP

You can use the same class on another node to join it to an existing UCP.

class { 'docker_ucp':
  ucp_url     => 'https://ucp-controller.example.com',
  fingerprint => 'the-ucp-fingerprint-for-your-install',
}

The default username and password are used, so it's likely that you'll need to provide those in parameters. The class also takes a number of other parameters useful for joininng. Again these should map to the options in the official UCP documetation.

class { 'docker_ucp':
  ucp_url                   => 'https://ucp-controller.example.com',
  fingerprint               => 'the-ucp-fingerprint-for-your-install',
  username                  => 'admin',
  password                  => 'orca',
  host_address              => ::ipaddress_eth1,
  subject_alternative_names => ::ipaddress_eth1,
  replica                   => true,
  version                   => '0.8.0',
  usage                     => false,
  tracking                  => false,
}

Limitations

As of Docker UCP 0.8, UCP only supports RHEL 7.0, 7.1, Ubuntu 14.04 and CentOS 7.1, therefore the module only works on those operating systems too.