old_contents: # Copyright 2014 Google Inc.
  #
  # Licensed under the Apache License, Version 2.0 (the "License");
  # you may not use this file except in compliance with the License.
  # You may obtain a copy of the License at
  #
  #      http://www.apache.org/licenses/LICENSE-2.0
  #
  # Unless required by applicable law or agreed to in writing, software
  # distributed under the License is distributed on an "AS IS" BASIS,
  # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  # See the License for the specific language governing permissions and
  # limitations under the License.
  #
  ################################################################################
  #
  # Ambari server + agent deployment.
  
  from gce import *
  
  GCE.setDefaults(
      project='curious-lemming-42',
      zone='us-central1-a',
  )
  
  server = Compute.instance(
      name='ambari-server',
      machineType='n1-standard-1',
      disks=[
        Disk.boot(
          autoDelete=true,
          initializeParams=Disk.initializeParams(
            sourceImage='centos-6-v20140415',
          ),
        ),
      ],
      metadata=Metadata.create(
        items=[
          Metadata.startupScript('../scripts/init/ambari-server-init.gen.sh'),
        ],
      ),
    )
  
  agents = [Compute.instance(
      name='ambari-agent-%d' % i,
      machineType='n1-standard-4',
      disks=[
        Disk.boot(
          autoDelete=true,
          initializeParams=Disk.initializeParams(
            sourceImage='centos-6-v20140415',
            diskSizeGb=500,
          ),
        ),
      ],
      metadata=Metadata.create(
        items=[
          Metadata.item('ambari-server', server.name),
          Metadata.startupScript('../scripts/init/ambari-agent-init.gen.sh'),
        ],
      ),
    ) for i in range(0, 5)
  ]
  
  resources = [server] + agents
  
new_contents: # Copyright 2014 Google Inc.
  #
  # Licensed under the Apache License, Version 2.0 (the "License");
  # you may not use this file except in compliance with the License.
  # You may obtain a copy of the License at
  #
  #      http://www.apache.org/licenses/LICENSE-2.0
  #
  # Unless required by applicable law or agreed to in writing, software
  # distributed under the License is distributed on an "AS IS" BASIS,
  # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  # See the License for the specific language governing permissions and
  # limitations under the License.
  #
  ################################################################################
  #
  # Ambari server + agent deployment.
  
  from gce import *
  
  GCE.setDefaults(
      project='curious-lemming-42',
      zone='us-central1-a',
  )
  
  server = Compute.instance(
      name='ambari-server',
      machineType='n1-standard-1',
      disks=[
        Disk.boot(
          autoDelete=true,
          initializeParams=Disk.initializeParams(
            sourceImage='centos-6-latest',
          ),
        ),
      ],
      metadata=Metadata.create(
        items=[
          Metadata.startupScript('../scripts/init/ambari-server-init.gen.sh'),
        ],
      ),
    )
  
  agents = [Compute.instance(
      name='ambari-agent-%d' % i,
      machineType='n1-standard-4',
      disks=[
        Disk.boot(
          autoDelete=true,
          initializeParams=Disk.initializeParams(
            sourceImage='centos-6-v20140415',
            diskSizeGb=500,
          ),
        ),
      ],
      metadata=Metadata.create(
        items=[
          Metadata.item('ambari-server', server.name),
          Metadata.startupScript('../scripts/init/ambari-agent-init.gen.sh'),
        ],
      ),
    ) for i in range(0, 5)
  ]
  
  resources = [server] + agents
  
subject: Set CentOS version to 'latest' for simplicity.