Class: VagrantPlugins::Rancher::Provisioner

Inherits:
Object
  • Object
show all
Defined in:
lib/vagrant-rancher/provisioner.rb

Instance Method Summary collapse

Constructor Details

#initialize(machine, config, rancher = nil) ⇒ Provisioner

Returns a new instance of Provisioner.



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# File 'lib/vagrant-rancher/provisioner.rb', line 7

def initialize(machine, config, rancher = nil)
  super(machine, config)
  @rancher = rancher || RancherClient.new(@config.hostname, @config.port)
end

Instance Method Details

#check_docker ⇒ Object

determines if we can reach the docker daemon



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# File 'lib/vagrant-rancher/provisioner.rb', line 23

def check_docker
  unless @machine.communicate.test('sh -c sleep 3; sudo docker info')
    @machine.ui.error 'Could not connect to docker daemon'
    raise Errors::DockerConnection
  end
end

#configure_agent ⇒ Object

configure the agent in rancher

Raises:



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# File 'lib/vagrant-rancher/provisioner.rb', line 181

def configure_agent
  # retrieve the project id
  project_id = @rancher.get_project_id @config.project
  raise Errors::ProjectNotFound if project_id.nil?

  # retrieve the host by the @machine.id label
  host = @rancher.get_host project_id, @machine.id
  raise Errors::HostNotFound, :project_id => project_id if host.nil?

  # when deactivate is set and the host is active, deactivate it
  if @config.deactivate and host['state'] == 'active'
    @machine.ui.info "Deactivating agent..."
    @rancher.deactivate_host project_id, host['id']
  end
end

#configure_server ⇒ Object

configures a running server with the required settings



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# File 'lib/vagrant-rancher/provisioner.rb', line 75

def configure_server
  # get the specified project
  project_id = @rancher.get_project_id @config.project

  # verify the project is of the correct type
  unless project_id.nil?
    recreate = false
    project = @rancher.get_project project_id
    if project['kubernetes'] and @config.project_type != 'kubernetes'
      recreate = true
    elsif project['swarm'] and @config.project_type != 'swarm'
      recreate = true
    elsif @config.project_type == 'cattle' and (project['kubernetes'] or project['swarm'])
      recreate = true
    end

    # destroy the project and set project_id to nil when
    # the project is not the specified type
    if recreate
      @rancher.delete_project project_id
      project_id = nil
    end
  end

  # create the project if it doesn't exist
  if project_id.nil?
    @machine.ui.detail "Project does not exist, creating now..."
    @rancher.create_project @config.project, @config.project_type
    sleep 2
    project_id = @rancher.get_project_id @config.project
    raise Errors::ProjectNotFound if project_id.nil?
  end

  # set the default project for the admin user
  user_id = @rancher.get_admin_id
  @rancher.set_default_project user_id, project_id

  # attempt to retrieve a registration token, otherwise create one
  unless @rancher.get_registration_token project_id
    @machine.ui.detail "Registration tokens have not been created, creating now..."
    @rancher.create_registration_token project_id

    # set the api.host setting required for agents
    @rancher.configure_setting 'api.host', "http://#{@config.hostname}:#{@config.port}"
    sleep(2)

    # verify that the registration token was created
    raise Errors::RegistrationTokenMissing unless @rancher.get_registration_token project_id
  end
end

#install_agent ⇒ Object

runs the agent container on the guest



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# File 'lib/vagrant-rancher/provisioner.rb', line 127

def install_agent
  # if the agent container is not running, start it
  unless @machine.communicate.test('sudo docker inspect rancher-agent')
    # retrieve the default project id
    project_id = @rancher.get_project_id @config.project
    raise Errors::ProjectNotFound if project_id.nil?

    # retrieve the registration token
    @machine.ui.detail 'Retrieving agent registration command...'
    registration_token = @rancher.get_registration_token project_id
    raise Errors::RegistrationTokenMissing if registration_token.nil?

    docker_cmd = registration_token['command']

    # apply a default label with the machine id used for
    # checking that the agent has indeed registered the host
    labels = "id=#{@machine.id}"
    # apply and additional host labels
    unless config.labels.nil?
      labels = "#{labels}&#{config.labels.join('&')}"
    end

    extra_args = "-e 'CATTLE_HOST_LABELS=#{labels}' --name rancher-agent-bootstrap"
    docker_cmd = docker_cmd.sub('docker run', "docker run #{extra_args}")

    # pull rancher agent image if its not already there
    image_check_cmd = "sudo docker images | awk '{ print $1\":\"$2 }' | grep -q #{registration_token['image']}"
    unless @machine.communicate.test(image_check_cmd)
      @machine.ui.info "Pulling Rancher agent image: #{registration_token['image']}..."
      unless @machine.communicate.sudo("docker pull #{registration_token['image']}")
        @machine.ui.error "Could not pull Rancher agent image"
        raise Errors::RancherServerContainer
      end
    end

    # start the agent container
    @machine.ui.info "Starting agent container: #{registration_token['image']}..."
    unless @machine.communicate.sudo(docker_cmd)
      @machine.ui.error 'Could not start Rancher agent container'
      raise Errors::RancherAgentContainer
    end

    # wait for the agent to register the host in rancher (checks
    # for the @machine.id in the host labels)
    @machine.ui.detail 'Waiting for agent to register...'
    unless @rancher.wait_for_agent project_id, @machine.id
      raise Errors::AgentRegistrationTimeout,
        :host => @config.hostname,
        :port => @config.port
    end
  end
end

#install_server ⇒ Object

installs the rancher server at the supplied version



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# File 'lib/vagrant-rancher/provisioner.rb', line 31

def install_server
  # check to see if the rancher server is already running
  unless @machine.communicate.test('sudo docker inspect rancher-server')
    image = "#{config.rancher_server_image}:#{config.version}"

    # pull rancher server image if its not already there
    image_check_cmd = "sudo docker images | awk '{ print $1\":\"$2 }' | grep -q #{image}"
    unless @machine.communicate.test(image_check_cmd)
      @machine.ui.info "Pulling Rancher server image: #{image}..."
      unless @machine.communicate.sudo("docker pull #{image}")
        @machine.ui.error "Could not pull Rancher server image"
        raise Errors::RancherServerContainer
      end
    end

    @machine.ui.info "Starting server container: #{image}..."

    docker_cmd = "docker run -d -t --name rancher-server -p #{@config.port}:8080"

    # add any user supplied args to the docker command
    unless config.server_args.nil?
      docker_cmd = "#{docker_cmd} #{config.server_args}"
    end

    # start the server and error if there is a failure
    unless @machine.communicate.sudo("#{docker_cmd} #{image}")
      @machine.ui.error 'Could not start Rancher server container'
      raise Errors::RancherServerContainer
    end

    # wait for the server api to come online
    @machine.ui.detail 'Waiting for server API to become available...'
    unless @rancher.wait_for_api
      raise Errors::ApiConnectionTimeout,
        :host => @config.hostname,
        :port => @config.port
    end

    # gratuitous pause for the server api
    sleep 5
  end
end

#provision ⇒ Object 



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# File 'lib/vagrant-rancher/provisioner.rb', line 12

def provision
  self.check_docker

  self.install_server if config.role == 'server'

  self.configure_server
  self.install_agent
  self.configure_agent
end