Class: Beaker::Docker

Inherits:
Hypervisor show all
Defined in:
lib/beaker/hypervisor/docker.rb

Constant Summary

Constants inherited from Hypervisor

Hypervisor::CHARMAP

Constants included from HostPrebuiltSteps

HostPrebuiltSteps::APT_CFG, HostPrebuiltSteps::CUMULUS_PACKAGES, HostPrebuiltSteps::DEBIAN_PACKAGES, HostPrebuiltSteps::ETC_HOSTS_PATH, HostPrebuiltSteps::ETC_HOSTS_PATH_SOLARIS, HostPrebuiltSteps::IPS_PKG_REPO, HostPrebuiltSteps::NTPSERVER, HostPrebuiltSteps::ROOT_KEYS_SCRIPT, HostPrebuiltSteps::ROOT_KEYS_SYNC_CMD, HostPrebuiltSteps::SLEEPWAIT, HostPrebuiltSteps::SLES_PACKAGES, HostPrebuiltSteps::TRIES, HostPrebuiltSteps::UNIX_PACKAGES, HostPrebuiltSteps::WINDOWS_PACKAGES

Instance Method Summary collapse

Methods inherited from Hypervisor

#configure, create, #generate_host_name, #proxy_package_manager, #validate

Methods included from HostPrebuiltSteps

#add_el_extras, #additive_hash_merge, #apt_get_update, #check_and_install_packages_if_needed, #construct_env, #copy_file_to_remote, #copy_ssh_to_root, #disable_iptables, #disable_se_linux, #echo_on_host, #enable_root_login, #epel_info_for, #get_domain_name, #get_ip, #hack_etc_hosts, #package_proxy, #proxy_config, #set_env, #set_etc_hosts, #sync_root_keys, #timesync, #validate_host

Methods included from Beaker::DSL::Patterns

#block_on

Constructor Details

#initialize(hosts, options) ⇒ Docker

Returns a new instance of Docker.



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# File 'lib/beaker/hypervisor/docker.rb', line 4

def initialize(hosts, options)
  require 'docker'
  @options = options
  @logger = options[:logger]
  @hosts = hosts

  # increase the http timeouts as provisioning images can be slow
  ::Docker.options = { :write_timeout => 300, :read_timeout => 300 }.merge(::Docker.options || {})
  # assert that the docker-api gem can talk to your docker
  # enpoint.  Will raise if there is a version mismatch
  ::Docker.validate_version!
  # Pass on all the logging from docker-api to the beaker logger instance
  ::Docker.logger = @logger
end

Instance Method Details

#cleanup ⇒ Object 



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# File 'lib/beaker/hypervisor/docker.rb', line 63

def cleanup
  @logger.notify "Cleaning up docker"
  @hosts.each do |host|
    if container = host['docker_container']
      @logger.debug("stop container #{container.id}")
      begin
        container.stop
        sleep 2 # avoid a race condition where the root FS can't unmount
      rescue Excon::Errors::ClientError => e
        @logger.warn("stop of container #{container.id} failed: #{e.response.body}")
      end
      @logger.debug("delete container #{container.id}")
      begin
        container.delete
      rescue Excon::Errors::ClientError => e
        @logger.warn("deletion of container #{container.id} failed: #{e.response.body}")
      end
    end

    # Do not remove the image if docker_reserve_image is set to true, otherwise remove it
    if image = (host['docker_preserve_image'] ? nil : host['docker_image'])
      @logger.debug("delete image #{image.id}")
      begin
        image.delete
      rescue Excon::Errors::ClientError => e
        @logger.warn("deletion of image #{image.id} failed: #{e.response.body}")
      end
    end
  end
end

#provision ⇒ Object 



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# File 'lib/beaker/hypervisor/docker.rb', line 19

def provision
  @logger.notify "Provisioning docker"

  @hosts.each do |host|
    @logger.notify "provisioning #{host.name}"

    @logger.debug("Creating image")
    image = ::Docker::Image.build(dockerfile_for(host), { :rm => true })

    @logger.debug("Creating container from image #{image.id}")
    container = ::Docker::Container.create({
      'Image' => image.id,
      'Hostname' => host.name,
    })

    @logger.debug("Starting container #{container.id}")
    container.start({"PublishAllPorts" => true, "Privileged" => true})

    # Find out where the ssh port is from the container
    if ENV['DOCKER_HOST']
      ip = URI.parse(ENV['DOCKER_HOST']).host
      @logger.info("Using docker server at #{ip}")
    else
      ip = container.json["NetworkSettings"]["Ports"]["22/tcp"][0]["HostIp"]
    end
    port = container.json["NetworkSettings"]["Ports"]["22/tcp"][0]["HostPort"]

    forward_ssh_agent = @options[:forward_ssh_agent] || false

    # Update host metadata
    host['ip']  = ip
    host['port'] = port
    host['ssh']  = {
      :password => root_password,
      :port => port,
      :forward_agent => forward_ssh_agent,
    }

    @logger.debug("node available as  ssh -o UserKnownHostsFile=/dev/null -o StrictHostKeyChecking=no root@#{ip} -p #{port}")
    host['docker_container'] = container
    host['docker_image'] = image
  end
end