Route 477

■ [ruby][memo] google-api-clientでGCE instanceを起動する

gcloudコマンドと同じことがAPI経由でもできるはずだよね〜と軽い気持ちで試してみたらかなり大変だったので、コードの断片だけ貼っておく。

require 'google/api_client'  # v0.8.6
...

    def create
      if options['mesosphere_id']
        network = "global/networks/mesosphere-custom-#{options['mesosphere_id']}"
        firewall = "mesosphere-custom-#{options['mesosphere_id']}-port-22"
      else
        raise "--mesosphere_id is not set"
      end
      zone = "asia-east1-c"
      name = "instance_test1"

      gce = google.discovered_api('compute')
      logger.info("Creating instance")
      res = google.execute(
        api_method: gce.instances.insert,
        parameters: {
          project: config["gce_project_id"],
          zone: zone,
        },
        body_object: {
          name: name,
          machineType: "zones/#{zone}/machineTypes/n1-standard-1",
          disks: [{
            boot: true,
            initializeParams: {
              sourceImage: "projects/google-containers/global/images/container-vm-v20150715",
              diskSizeGb: 50,
            },
          }],
          networkInterfaces: [{
            network: network,  # Mesosphereとの連携に使用
            accessConfigs: [{type: 'ONE_TO_ONE_NAT', name: 'External NAT'}]  # これがないと外部IPが付かない
          }],
          tags: {items: [firewall]}  # Mesosphereとの連携に使用
        }
      )
      logger.debug(res.inspect)
      json = JSON.parse(res.body)
      if json["error"]
        logger.error("Got error:\n"+res.body)
      else
        logger.info("Response:\n"+res.body)
      end
    end

    private

    def google
      return @google if @google
      @google = Google::APIClient.new(
        :application_name => 'Example Ruby application',
        :application_version => '1.0.0'
      )
      @google.authorization = :google_app_default
      @google.authorization.fetch_access_token!
      return @google
    end
  end