Arbeitsprotokollanwendung mit HTTP-Load-Balancing erstellen

Dieses erweiterte Beispiel zeigt, wie eine Arbeitsprotokollanwendung erstellt wird, die node.js als Front-End und MySQL als Back-End verwendet. Die Vorlage erstellt und verbindet auch einen HTTP-Lastenausgleich, der Lasten zwischen zwei Zonen ausgleicht, sowie ein Autoscaling, das die Anwendung automatisch skaliert.

Bereitstellungsressourcen mit HTTP-Lastenausgleich
Bereitstellungsressourcen mit HTTP-Lastenausgleich (zum Vergrößern klicken)

In diesem Beispiel wird angenommen, dass Sie mit Docker-Containern und Compute Engine-Ressourcen, insbesondere HTTP-Lastenausgleich, Autoscaling, verwalteten Instanzgruppen und Instanzvorlagen, vertraut sind.

Weitere einführende Informationen finden Sie im Schnellstart oder in der detaillierten Anleitung.

Vorbereitung

Vorlagen erstellen

Dieses Beispiel startet eine Bereitstellung mit mehreren Typen von Ressourcen. Zunächst erstellen Sie wiederverwendbare Vorlagen, durch die diese Ressourcen separat definiert werden. Später nutzen Sie diese Vorlagen in Ihrer endgültigen Konfiguration.

Am Ende dieses Beispiels haben Sie eine Bereitstellung, die diese Ressourcen enthält:

  • Eine einzige Compute Engine-Instanz für die Back-End-MySQL-VM.
  • Eine Instanzvorlage, die ein Docker-Image verwendet.
  • Zwei automatisch skalierte, verwaltete Instanzgruppen in zwei verschiedenen Zonen, die den Front-End-Node.js-Dienst ausführen.
  • Weitere zwei automatisch skalierte, verwaltete Instanzgruppen, die statische Daten liefern.
  • Eine Systemdiagnose und ein HTTP-Lastenausgleichsmodul für die Verteilung von Traffic über die jeweiligen verwalteten Instanzgruppen.

Back-End-Vorlagen erstellen

Das Back-End dieser Anwendung ist eine einzelne Compute Engine-Instanz, auf der ein MySQL Docker-Container ausgeführt wird. Erstellen Sie eine Vorlage, in der eine Compute-Engine Instanz definiert ist, die ein containeroptimiertes Image verwendet. Geben Sie der Datei den Namen container_vm.[py|jinja]:

Jinja

{#
Copyright 2016 Google Inc. All rights reserved.
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.
#}

{% from 'container_helper.jinja' import GenerateManifest %}
{% set COMPUTE_URL_BASE = 'https://www.googleapis.com/compute/v1/' %}

resources:
- name: {{ env['name'] }}
  type: compute.v1.instance
  properties:
    zone: {{ properties['zone'] }}
    machineType: {{ COMPUTE_URL_BASE }}projects/{{ env['project'] }}/zones/{{ properties['zone'] }}/machineTypes/f1-micro
    metadata:
      items:
      - key: gce-container-declaration
        value: |
          {{ GenerateManifest(env['name'], properties['port'], properties['dockerImage'], properties['dockerEnv'])|indent(10) }}
    disks:
    - deviceName: boot
      type: PERSISTENT
      autoDelete: true
      boot: true
      initializeParams:
        diskName: {{ env['name'] }}-disk
        sourceImage: {{ COMPUTE_URL_BASE }}projects/cos-cloud/global/images/{{ properties['containerImage'] }}
    networkInterfaces:
    - accessConfigs:
      - name: external-nat
        type: ONE_TO_ONE_NAT
      network: {{ COMPUTE_URL_BASE }}projects/{{ env['project'] }}/global/networks/default
    serviceAccounts:
      - email: default
        scopes:
        - https://www.googleapis.com/auth/logging.write
        - https://www.googleapis.com/auth/monitoring.write

Python

# Copyright 2016 Google Inc. All rights reserved.
#
# 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.

"""Creates a Container VM with the provided Container manifest."""

from container_helper import GenerateManifest

COMPUTE_URL_BASE = 'https://www.googleapis.com/compute/v1/'

def GlobalComputeUrl(project, collection, name):
  return ''.join([COMPUTE_URL_BASE, 'projects/', project,
                  '/global/', collection, '/', name])

def ZonalComputeUrl(project, zone, collection, name):
  return ''.join([COMPUTE_URL_BASE, 'projects/', project,
                  '/zones/', zone, '/', collection, '/', name])

def GenerateConfig(context):
  """Generate configuration."""

  base_name = context.env['name']

  # Properties for the container-based instance.
  instance = {
      'zone': context.properties['zone'],
      'machineType': ZonalComputeUrl(context.env['project'],
                                     context.properties['zone'],
                                     'machineTypes',
                                     'f1-micro'),
      'metadata': {
          'items': [{
              'key': 'gce-container-declaration',
              'value': GenerateManifest(context)
              }]
          },
      'disks': [{
          'deviceName': 'boot',
          'type': 'PERSISTENT',
          'autoDelete': True,
          'boot': True,
          'initializeParams': {
              'diskName': base_name + '-disk',
              'sourceImage': GlobalComputeUrl('cos-cloud',
                                              'images',
                                              context.properties[
                                                  'containerImage'])
              },
          }],
      'networkInterfaces': [{
          'accessConfigs': [{
              'name': 'external-nat',
              'type': 'ONE_TO_ONE_NAT'
              }],
          'network': GlobalComputeUrl(context.env['project'],
                                      'networks',
                                      'default')
          }],
        'serviceAccounts': [{
            'email': 'default',
            'scopes': ['https://www.googleapis.com/auth/logging.write']
            }]
      }

  # Resources to return.
  resources = {
      'resources': [{
          'name': base_name,
          'type': 'compute.v1.instance',
          'properties': instance
          }]
      }

  return resources

Die Vorlage definiert eine Reihe von Variablen wie containerImage und manifest, die ausgefüllt werden, wenn Sie die Konfiguration erstellen. Diese Vorlage allein erstellt nur eine einzelne VM-Instanz.

Wenn Sie Container-Images auf Compute Engine-Instanzen verwenden, müssen Sie auch eine Manifestdatei angeben (anders als ein Deployment Manager-Manifest), um für Compute Engine zu beschreiben, welches Container-Image verwendet werden soll. Erstellen Sie die Hilfsmethode container_helper.[py|jinja], um dynamisch das Containermanifest zu definieren:

Jinja

{#
Copyright 2016 Google Inc. All rights reserved.
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.
#}

{% macro GenerateManifest(name, port, dockerImage, dockerEnv) -%}
{# Generates a Container Manifest given a Template context.

   Args:
     context: Template context, which must contain dockerImage and port
        properties, and an optional dockerEnv property.

   Returns:
     A Container Manifest as a YAML string.
-#}
apiVersion: v1
kind: Pod
metadata:
  name: {{ name }}
spec:
  containers:
  - name: {{ name }}
    image: {{ dockerImage }}
    ports:
    - hostPort: {{ port }}
      containerPort: {{ port }}
    {% if dockerEnv -%}
    env:
    {% for key, value in dockerEnv.iteritems() -%}
    - name: {{ key }}
      value: '{{ value }}'
    {% endfor -%}
    {% endif -%}
{%- endmacro -%}

Python

# Copyright 2016 Google Inc. All rights reserved.
#
# 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.

"""Helper methods for working with containers in config."""

import yaml

def GenerateManifest(context):
  """Generates a Container Manifest given a Template context.

  Args:
    context: Template context, which must contain dockerImage and port
        properties, and an optional dockerEnv property.

  Returns:
    A Container Manifest as a YAML string.
  """
  env_list = []
  if 'dockerEnv' in context.properties:
    for key, value in context.properties['dockerEnv'].iteritems():
      env_list.append({'name': key, 'value': str(value)})

  manifest = {
      'apiVersion': 'v1',
      'kind': 'Pod',
      'metadata': {
          'name': str(context.env['name'])
          },
      'spec': {
          'containers': [{
              'name': str(context.env['name']),
              'image': context.properties['dockerImage'],
              'ports': [{
                  'hostPort': context.properties['port'],
                  'containerPort': context.properties['port']
                  }],
              }]
          }
      }

  if env_list:
    manifest['spec']['containers'][0]['env'] = env_list

  return yaml.dump(manifest, default_flow_style=False)

Front-End-Vorlagen erstellen

Das Front-End dieser Anwendung führt node.js aus und ermöglicht Nutzern das Posten von Nachrichten auf der Webseite. Es wird zwei verwaltete Instanzgruppen geben, die jeweils zwei Instanzen enthalten: eine primäre verwaltete Instanzgruppe und eine sekundäre verwaltete Instanzgruppe für den Lastenausgleich.

Erstellen Sie diese Front-End-Vorlagen mithilfe der folgenden Anweisungen.

  1. Erstellen Sie eine Instanzvorlage.

    Zum Erstellen einer verwalteten Instanzgruppe, die eine Gruppe zentral verwalteter und identischer VM-Instanzen ist, wird eine Instanzvorlagenressource benötigt. In diesem Beispiel wird eine verwaltete Instanzgruppe für die node.js-Front-End-Instanzen erstellt, aber erstellen Sie zunächst eine Instanzvorlage.

    Definieren Sie eine Datei mit dem Namen container_instance_template.[py|jinja]:

    Jinja

    {#
    Copyright 2016 Google Inc. All rights reserved.
    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.
    #}
    
    {% from 'container_helper.jinja' import GenerateManifest %}
    {% set IT_NAME = env['name'] + '-it' %}
    
    resources:
    - name: {{ IT_NAME }}
      type: compute.v1.instanceTemplate
      properties:
        properties:
          metadata:
            items:
            - key: gce-container-declaration
              value: |
                {{ GenerateManifest(env['name'], properties['port'],properties['dockerImage'], properties['dockerEnv'])|indent(12) }}
          machineType: f1-micro
          disks:
          - deviceName: boot
            boot: true
            autoDelete: true
            mode: READ_WRITE
            type: PERSISTENT
            initializeParams:
              sourceImage: https://www.googleapis.com/compute/v1/projects/cos-cloud/global/images/{{ properties['containerImage'] }}
          networkInterfaces:
          - accessConfigs:
            - name: external-nat
              type: ONE_TO_ONE_NAT
            network: https://www.googleapis.com/compute/v1/projects/{{ env['project'] }}/global/networks/default
          serviceAccounts:
            - email: default
              scopes:
              - https://www.googleapis.com/auth/logging.write
              - https://www.googleapis.com/auth/monitoring.write
    outputs:
    - name: instanceTemplateSelfLink
      value: $(ref.{{ IT_NAME }}.selfLink)
    

    Python

    # Copyright 2016 Google Inc. All rights reserved.
    #
    # 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.
    
    """Creates a Container VM with the provided Container manifest."""
    
    from container_helper import GenerateManifest
    
    def GenerateConfig(context):
      """Generates configuration."""
    
      image = ''.join(['https://www.googleapis.com/compute/v1/',
                       'projects/cos-cloud/global/images/',
                       context.properties['containerImage']])
      default_network = ''.join(['https://www.googleapis.com/compute/v1/projects/',
                                 context.env['project'],
                                 '/global/networks/default'])
    
      instance_template = {
          'name': context.env['name'] + '-it',
          'type': 'compute.v1.instanceTemplate',
          'properties': {
              'properties': {
                  'metadata': {
                      'items': [{
                          'key': 'gce-container-declaration',
                          'value': GenerateManifest(context)
                          }]
                      },
                  'machineType': 'f1-micro',
                  'disks': [{
                      'deviceName': 'boot',
                      'boot': True,
                      'autoDelete': True,
                      'mode': 'READ_WRITE',
                      'type': 'PERSISTENT',
                      'initializeParams': {'sourceImage': image}
                      }],
                  'networkInterfaces': [{
                      'accessConfigs': [{
                          'name': 'external-nat',
                          'type': 'ONE_TO_ONE_NAT'
                          }],
                      'network': default_network
                      }],
                    'serviceAccounts': [{
                        'email': 'default',
                        'scopes': ['https://www.googleapis.com/auth/logging.write']
                        }]
                  }
              }
          }
    
      outputs = [{'name': 'instanceTemplateSelfLink',
                  'value': '$(ref.' + instance_template['name'] + '.selfLink)'}]
    
      return {'resources': [instance_template], 'outputs': outputs}
    

  2. Erstellen Sie eine automatisch skalierte verwaltete Instanzgruppe.

    Mit dieser Instanzvorlage können Sie jetzt eine Vorlage definieren, die die Instanzvorlage verwendet, um eine automatisch skalierte verwaltete Instanzgruppe zu erstellen. Erstellen Sie eine neue Datei mit dem Namen autoscaled_group.[py|jinja] und folgendem Inhalt:

    Jinja

    {#
    Copyright 2016 Google Inc. All rights reserved.
    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.
    #}
    
    resources:
      - name: {{ env["name"] }}-igm
        type: compute.v1.instanceGroupManager
        properties:
          zone: {{ properties["zone"] }}
          targetSize: {{ properties["size"] }}
          baseInstanceName: {{ env["name"] }}-instance
          instanceTemplate: {{ properties["instanceTemplate"] }}
    
      - name: {{ env["name"] }}-as
        type: compute.v1.autoscaler
        properties:
          zone: {{ properties["zone"] }}
          target: $(ref.{{ env["name"] }}-igm.selfLink)
          autoscalingPolicy:
            maxNumReplicas: {{ properties["maxSize"] }}
    

    Python

    # Copyright 2016 Google Inc. All rights reserved.
    #
    # 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.
    
    """Creates autoscaled, network LB IGM running specified docker image."""
    
    def GenerateConfig(context):
      """Generate YAML resource configuration."""
    
      # NOTE: Once we can specify the port/service during creation of IGM,
      # we will wire it up here.
      name = context.env['name']
      resources = [{
          'name': name + '-igm',
          'type': 'compute.v1.instanceGroupManager',
          'properties': {
              'zone': context.properties['zone'],
              'targetSize': context.properties['size'],
              'baseInstanceName': name + '-instance',
              'instanceTemplate': context.properties['instanceTemplate']
          }
      }, {
          'name': name + '-as',
          'type': 'compute.v1.autoscaler',
          'properties': {
              'zone': context.properties['zone'],
              'target': '$(ref.' + name + '-igm.selfLink)',
              'autoscalingPolicy': {
                  'maxNumReplicas': context.properties['maxSize']
    
              }
          }
      }]
      return {'resources': resources}
    

    Erstellen Sie die entsprechende Schemadatei:

    Jinja

    # Copyright 2016 Google Inc. All rights reserved.
    #
    # 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.
    
    info:
      title: Autoscaled, network LB IGM template
      author: Google
      description: Creates an autoscaled Instance Group Manager running the specified Docker image
      version: 1.0
    
    required:
    - zone
    - instanceTemplate
    
    properties:
      zone:
        type: string
        description: Zone in which this VM will run
    
      instanceTemplate:
        type: string
        description: URL for the instance template to use for IGM
    
      size:
        type: integer
        default: 1
        description: Initial size of the Managed Instance Group
    
      maxSize:
        type: integer
        default: 1
        description: Maximum size the Managed Instance Group will be autoscaled to
    

    Python

    # Copyright 2016 Google Inc. All rights reserved.
    #
    # 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.
    
    info:
      title: Autoscaled, network LB IGM template
      author: Google
      description: Creates an autoscaled Instance Group Manager running the specified Docker image
      version: 1.0
    
    required:
    - zone
    - instanceTemplate
    
    properties:
      zone:
        type: string
        description: Zone in which this VM will run
    
      instanceTemplate:
        type: string
        description: URL for the instance template to use for IGM
    
      size:
        type: integer
        default: 1
        description: Initial size of the Managed Instance Group
    
      maxSize:
        type: integer
        default: 1
        description: Maximum size the Managed Instance Group will be autoscaled to
    

  3. Erstellen Sie Ressourcen, die diese Vorlagen verwenden.

    Bis hier haben Sie Basisvorlagen definiert, die die Eigenschaften Ihrer Ressourcen bestimmen. Definieren Sie mithilfe dieser Vorlagen die Einrichtung Ihres Front-Ends. Erstellen Sie eine neue Datei mit dem Namen service.[py|jinja] und folgendem Inhalt:

    Jinja

    {#
    Copyright 2016 Google Inc. All rights reserved.
    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.
    #}
    
    resources:
      - name: {{ env["name"] }}
        type: container_instance_template.jinja
        properties:
          port: {{ properties["port"] }}
          dockerEnv: {{ properties["dockerEnv"] }}
          dockerImage: {{ properties["dockerImage"] }}
          containerImage: {{ properties["containerImage"] }}
    
      - name: {{ env["name"] }}-pri
        type: autoscaled_group.jinja
        properties:
          zone: {{ properties["primaryZone"] }}
          size: {{ properties["primarySize"] }}
          maxSize: {{ properties["maxSize"] }}
          port: {{ properties["port"] }}
          service: {{ properties["service"] }}
          baseInstanceName: {{ env["name"] }}-instance
          instanceTemplate: $(ref.{{ env["name"] }}-it.selfLink)
    
      - name: {{ env["name"] }}-sec
        type: autoscaled_group.jinja
        properties:
          zone: {{ properties["secondaryZone"] }}
          size: {{ properties["secondarySize"] }}
          maxSize: {{ properties["maxSize"] }}
          port: {{ properties["port"] }}
          service: {{ properties["service"] }}
          baseInstanceName: {{ env["name"] }}-instance
          instanceTemplate: $(ref.{{ env["name"] }}-it.selfLink)
    
      - name: {{ env["name"] }}-hc
        type: compute.v1.httpHealthCheck
        properties:
          port: {{ properties["port"] }}
          requestPath: /_ah/health
    
      - name: {{ env["name"] }}-bes
        type: compute.v1.backendService
        properties:
          port: {{ properties["port"] }}
          portName: {{ properties["service"] }}
          backends:
            - name: {{ env["name"] }}-primary
              group: $(ref.{{ env["name"] }}-pri-igm.instanceGroup)
            - name: {{ env["name"] }}-secondary
              group: $(ref.{{ env["name"] }}-sec-igm.instanceGroup)
          healthChecks: [ $(ref.{{ env["name"] }}-hc.selfLink) ]
    

    Python

    # Copyright 2016 Google Inc. All rights reserved.
    #
    # 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.
    
    """Creates primary/secondary zone autoscaled IGM running specified container."""
    
    def GenerateConfig(context):
      """Generate YAML resource configuration."""
    
      name = context.env['name']
    
      resources = [{
          'name': name,
          'type': 'container_instance_template.py',
          'properties': {
              'port': context.properties['port'],
              'dockerEnv': context.properties['dockerEnv'],
              'dockerImage': context.properties['dockerImage'],
              'containerImage': context.properties['containerImage']
          }
      }, {
          'name': name + '-pri',
          'type': 'autoscaled_group.py',
          'properties': {
              'zone': context.properties['primaryZone'],
              'size': context.properties['primarySize'],
              'maxSize': context.properties['maxSize'],
              'port': context.properties['port'],
              'service': context.properties['service'],
              'baseInstanceName': name + '-instance',
              'instanceTemplate': '$(ref.' + name + '-it.selfLink)'
          }
      }, {
          'name': name + '-sec',
          'type': 'autoscaled_group.py',
          'properties': {
              'zone': context.properties['secondaryZone'],
              'size': context.properties['secondarySize'],
              'maxSize': context.properties['maxSize'],
              'port': context.properties['port'],
              'service': context.properties['service'],
              'baseInstanceName': name + '-instance',
              'instanceTemplate': '$(ref.' + name + '-it.selfLink)'
          }
      }, {
          'name': name + '-hc',
          'type': 'compute.v1.httpHealthCheck',
          'properties': {
              'port': context.properties['port'],
              'requestPath': '/_ah/health'
          }
      }, {
          'name': name + '-bes',
          'type': 'compute.v1.backendService',
          'properties': {
              'port': context.properties['port'],
              'portName': context.properties['service'],
              'backends': [{
                  'name': name + '-primary',
                  'group': '$(ref.' + name + '-pri-igm.instanceGroup)'
              }, {
                  'name': name + '-secondary',
                  'group': '$(ref.' + name + '-sec-igm.instanceGroup)'
              }],
              'healthChecks': ['$(ref.' + name + '-hc.selfLink)']
          }
      }]
      return {'resources': resources}
    

    Erstellen Sie die entsprechende Schemadatei:

    Jinja

    # Copyright 2016 Google Inc. All rights reserved.
    #
    # 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.
    
    info:
      title: Autoscaled IGM
      author: Google
      description: Creates primary/secondary zone autoscaled IGM running specified container.
      version: 1.0
    
    imports:
    - path: autoscaled_group.jinja
    - path: ../../common/jinja/container_instance_template.jinja
      name: container_instance_template.jinja
    
    required:
    - port
    - service
    - primaryZone
    - secondaryZone
    - dockerImage
    
    properties:
      primarySize:
        type: integer
        default: 1
        description: The size of the primary autoscaled IGM
    
      secondarySize:
        type: integer
        default: 0
        description: The size of the secondary autoscaled IGM
    
      maxSize:
        type: integer
        default: 1
        description: The maximum size of the IGM
    
      containerImage:
        type: string
        default: family/cos-stable
        description: The container image to be used
    
      dockerEnv:
        type: object
        default: {}
        description: The container environment variables
    
      dockerImage:
        type: string
        description: the docker image to be used
    
      port:
        type: integer
        description: Port to expose on the container as well as on the load balancer (e.g., 8080)
    
      service:
        type: string
        description: Name of the service the port exposes for loadbalancing (backendService) purposes
    
      primaryZone:
        type: string
        description: Primary Zone in which to run the service
    
      secondaryZone:
        type: string
        description: Secondary Zone in which to run the service
    

    Python

    # Copyright 2016 Google Inc. All rights reserved.
    #
    # 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.
    
    info:
      title: Autoscaled IGM
      author: Google
      description: Creates primary/secondary zone autoscaled IGM running specified container.
      version: 1.0
    
    imports:
    - path: autoscaled_group.py
    - path: ../../common/python/container_instance_template.py
      name: container_instance_template.py
    
    required:
    - port
    - service
    - primaryZone
    - secondaryZone
    - dockerImage
    
    properties:
      primarySize:
        type: integer
        default: 1
        description: The size of the primary autoscaled IGM
    
      secondarySize:
        type: integer
        default: 0
        description: The size of the secondary autoscaled IGM
    
      maxSize:
        type: integer
        default: 1
        description: The maximum size of the IGM
    
      containerImage:
        type: string
        default: family/cos-stable
        description: The container image to be used
    
      dockerEnv:
        type: object
        default: {}
        description: The container environment variables
    
      dockerImage:
        type: string
        description: the docker image to be used
    
      port:
        type: integer
        description: Port to expose on the container as well as on the load balancer (e.g., 8080)
    
      service:
        type: string
        description: Name of the service the port exposes for loadbalancing (backendService) purposes
    
      primaryZone:
        type: string
        description: Primary Zone in which to run the service
    
      secondaryZone:
        type: string
        description: Secondary Zone in which to run the service
    

    Sehen wir uns an, was diese Vorlage erstellt:

    1. Zwei verwaltete Instanzgruppen, eine primäre und eine sekundäre.

      Die Vorlage nutzt die Vorlage autoscaled_group.[py|jinja], um eine primäre und eine sekundäre automatisch skalierte Instanzgruppe zu erstellen.

    2. Als Nächstes erstellt die Vorlage einen Back-End-Dienst und eine Systemdiagnose. Ein Back-End-Dienst wird für den HTTP-Lastenausgleich benötigt und definiert die Bereitstellungskapazität der Instanzgruppen in diesem Back-End-Dienst. In diesem Fall sind die primären und sekundären verwalteten Instanzgruppen Teil des Back-Ends und die Standardattribute des Back-End-Dienstes finden Anwendung.

      Standardmäßig führt ein Back-End-Dienst den Lastenausgleich basierend auf der CPU-Auslastung der verbundenen Instanzgruppen durch, aber Sie können den Lastenausgleich auch basierend auf Anfragen pro Sekunde (RPS) durchführen.

      Hinweis: Wenn ein Back-End-Dienst erstellt wird, ist immer eine Systemdiagnose notwendig.

Gemeinsame Vorlage erstellen

Erstellen Sie schließlich eine gemeinsame Vorlage, die die Back-End- und Front-End-Vorlage miteinander kombiniert. Erstellen Sie eine neue Datei mit dem Namen application.[py|jinja]:

Jinja

{#
Copyright 2016 Google Inc. All rights reserved.
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.
#}

{% set BACKEND = env["deployment"] + "-backend" %}
{% set FRONTEND = env["deployment"] + "-frontend" %}
{% set STATIC_SERVICE = env["deployment"] + "-static-service" %}
{% set APPLICATION = env["deployment"] + "-application" %}

{% set APPLICATION_PORT = 8080 %}
{% set LB_PORT = 8080 %}
{% set MYSQL_PORT = 8080 %}

{% set CONTAINER_IMAGE = "family/cos-stable" %}

resources:
- name: {{ BACKEND }}
  type: container_vm.jinja
  properties:
    zone: {{ properties["primaryZone"] }}
    dockerImage: {{ properties["backendImage"] }}
    containerImage: {{ CONTAINER_IMAGE }}
    port: {{ MYSQL_PORT }}

- name: {{ FRONTEND }}
  type: service.jinja
  properties:
    primaryZone: {{ properties["primaryZone"] }}
    primarySize: 2
    secondaryZone: {{ properties["secondaryZone"] }}
    secondarySize: 0
    dockerImage: {{ properties["frontendImage"] }}
    containerImage: {{ CONTAINER_IMAGE }}
    port: {{ APPLICATION_PORT }}
    service: http
    # If left out will default to 1
    maxSize: 20

    # Define the variables that are exposed to container as env variables.
    dockerEnv:
      SEVEN_SERVICE_MYSQL_PORT: {{ MYSQL_PORT }}
      SEVEN_SERVICE_PROXY_HOST: $(ref.{{ BACKEND }}.networkInterfaces[0].networkIP)

- name: {{ STATIC_SERVICE }}
  type: service.jinja
  properties:
    primaryZone: {{ properties["primaryZone"] }}
    primarySize: 2
    secondaryZone: {{ properties["secondaryZone"] }}
    secondarySize: 0
    dockerImage: {{ properties["staticImage"] }}
    containerImage: {{ CONTAINER_IMAGE }}
    port: {{ APPLICATION_PORT }}
    service: httpstatic
    # If left out will default to 1
    maxSize: 20

- name: {{ APPLICATION }}-urlmap
  type: compute.v1.urlMap
  properties:
    defaultService: $(ref.{{ FRONTEND }}-bes.selfLink)
    hostRules:
      - hosts: ["*"]
        pathMatcher: pathmap
    pathMatchers:
      - name: pathmap
        defaultService: $(ref.{{ FRONTEND }}-bes.selfLink)
        pathRules:
          - paths: ["/static", "/static/*"]
            service: $(ref.{{ STATIC_SERVICE }}-bes.selfLink)
- name: {{ APPLICATION }}-targetproxy
  type: compute.v1.targetHttpProxy
  properties:
    urlMap: $(ref.{{ APPLICATION }}-urlmap.selfLink)
- name: {{ APPLICATION }}-l7lb
  type: compute.v1.globalForwardingRule
  properties:
    IPProtocol: TCP
    portRange: {{ LB_PORT }}
    target: $(ref.{{ APPLICATION }}-targetproxy.selfLink)
- name: {{ APPLICATION }}-fw
  type: compute.v1.firewall
  properties:
    allowed:
      - IPProtocol: TCP
        ports: [ {{ LB_PORT }} ]
    sourceRanges: [ 0.0.0.0/0 ]

Python

# Copyright 2016 Google Inc. All rights reserved.
#
# 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.

"""Create appplication template with back-end and front-end templates."""

def GenerateConfig(context):
  """Generate configuration."""

  backend = context.env['deployment'] + '-backend'
  frontend = context.env['deployment'] + '-frontend'
  static_service = context.env['deployment'] + '-static-service'
  application = context.env['deployment'] + '-application'

  container_image = 'family/cos-stable'

  application_port = 8080
  lb_port = 8080
  mysql_port = 8080

  resources = [{
      'name': backend,
      'type': 'container_vm.py',
      'properties': {
          'zone': context.properties['primaryZone'],
          'dockerImage': context.properties['backendImage'],
          'containerImage': container_image,
          'port': mysql_port
      }
  }, {
      'name': frontend,
      'type': 'service.py',
      'properties': {
          'primaryZone': context.properties['primaryZone'],
          'primarySize': 2,
          'secondaryZone': context.properties['secondaryZone'],
          'secondarySize': 0,
          'dockerImage': context.properties['frontendImage'],
          'containerImage': container_image,
          'port': application_port,
          'service': 'http',
          # If left out will default to 1
          'maxSize': 20,
          # Define the variables that are exposed to container as env variables.
          'dockerEnv': {
              'SEVEN_SERVICE_MYSQL_PORT': mysql_port,
              'SEVEN_SERVICE_PROXY_HOST': '$(ref.' + backend
                                          + '.networkInterfaces[0].networkIP)'
          }
      }
  }, {
      'name': static_service,
      'type': 'service.py',
      'properties': {
          'primaryZone': context.properties['primaryZone'],
          'primarySize': 2,
          'secondaryZone': context.properties['secondaryZone'],
          'secondarySize': 0,
          'dockerImage': context.properties['staticImage'],
          'containerImage': container_image,
          'port': application_port,
          'service': 'httpstatic',
          # If left out will default to 1
          'maxSize': 20
      }
  }, {
      'name': application + '-urlmap',
      'type': 'compute.v1.urlMap',
      'properties': {
          'defaultService': '$(ref.' + frontend + '-bes.selfLink)',
          'hostRules': [{
              'hosts': ['*'],
              'pathMatcher': 'pathmap'
          }],
          'pathMatchers': [{
              'name': 'pathmap',
              'defaultService': '$(ref.' + frontend + '-bes.selfLink)',
              'pathRules': [{
                  'paths': ['/static', '/static/*'],
                  'service': '$(ref.' + static_service + '-bes.selfLink)'
              }]
          }]
      }
  }, {
      'name': application + '-targetproxy',
      'type': 'compute.v1.targetHttpProxy',
      'properties': {
          'urlMap': '$(ref.' + application + '-urlmap.selfLink)'
      }
  }, {
      'name': application + '-l7lb',
      'type': 'compute.v1.globalForwardingRule',
      'properties': {
          'IPProtocol': 'TCP',
          'portRange': lb_port,
          'target': '$(ref.' + application + '-targetproxy.selfLink)'
      }
  }, {
      'name': application + '-fw',
      'type': 'compute.v1.firewall',
      'properties': {
          'allowed': [{
              'IPProtocol': 'TCP',
              'ports': [lb_port]
          }],
          'sourceRanges': ['0.0.0.0/0']
      }
  }]
  return {'resources': resources}

Erstellen Sie eine zugehörige Schemadatei:

Jinja

# Copyright 2016 Google Inc. All rights reserved.
#
# 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.

info:
  title: Application Template
  author: Google
  description: Create application template with back-end and front-end templates
  version: 1.0

imports:
- path: service.jinja
- path: ../../common/jinja/container_vm.jinja
  name: container_vm.jinja

required:
- primaryZone
- secondaryZone
- backendImage
- frontendImage
- staticImage

properties:
  primaryZone:
    type: string
    description: Primary Zone in which to run the service

  secondaryZone:
    type: string
    description: Secondary Zone in which to run the service

  backendImage:
    type: string
    description: Docker image to use in the backend

  frontendImage:
    type: string
    description: Docker image to use in the frontend service

  staticImage:
    type: string
    description: Docker image to use in the static service

Python

# Copyright 2016 Google Inc. All rights reserved.
#
# 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.

info:
  title: Application Template
  author: Google
  description: Create application template with back-end and front-end templates
  version: 1.0

imports:
- path: service.py
- path: ../../common/python/container_vm.py
  name: container_vm.py

required:
- primaryZone
- secondaryZone
- backendImage
- frontendImage
- staticImage

properties:
  primaryZone:
    type: string
    description: Primary Zone in which to run the service

  secondaryZone:
    type: string
    description: Secondary Zone in which to run the service

  backendImage:
    type: string
    description: Docker image to use in the backend

  frontendImage:
    type: string
    description: Docker image to use in the frontend service

  staticImage:
    type: string
    description: Docker image to use in the static service

Die Vorlage definiert zusätzlich zum Front-End und Back-End noch weitere Ressourcen:

  1. Einen statischen Dienst mit primären und sekundären verwalteten Instanzgruppen. Dieser statische Dienst stellt eine Webseite bereit, die sich unter dem Pfad /static in Ihrer Anwendung befindet.

  2. Eine URL-Zuordnungsressource. Der HTTP-Lastenausgleich benötigt eine URL-Zuordnung, um die verschiedenen URLs den richtigen Pfaden zuzuordnen. In diesem Fall ist der Standardpfad (erkennbar am Attribut defaultService) der Back-End-Dienst, den Sie zuvor erstellt haben. Falls ein Nutzer /static aufruft, ordnet die URL-Zuordnung diesen Pfad dem statischen Dienst, wie im Abschnitt pathMatchers definiert, zu.

  3. Eine globale Weiterleitungsregel und einen Ziel-HTTP-Proxy. Da der Lastenausgleich für die Anwendung in zwei verschiedenen Zonen stattfindet, benötigen Sie eine globale Weiterleitungsregel für eine einzelne externe IP-Adresse. Zusätzlich benötigen Sie einen Ziel-HTTP-Proxy für die Einrichtung des HTTP-Lastenausgleichs.

  4. Eine Firewallregel, die Traffic über Port 8080 erlaubt.

Konfiguration erstellen

Mit Ihren Vorlagen und den verknüpften Schemas können Sie eine Konfiguration erstellen, die diese Ressourcen bereitstellt. Erstellen Sie eine Konfigurationsdatei mit dem Namen application.yaml mit den folgenden Inhalten und ersetzten Sie ZONE_TO_RUN und SECONDARY_ZONE_TO_RUN durch die primäre und sekundäre Zone Ihrer Wahl.

Jinja

# Copyright 2016 Google Inc. All rights reserved.
#
# 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.

# Launches an autoscaled, load-balanced frontend in two zones running nodejs
# for serving traffic using L7 loadbalancing. Also launches a single MySQL
# container instance, wires the two together using references, and passes
# them as env variables to the underlying frontend Docker containers.
#
# NOTE: Due to the fact that IGM does not allow specifying service/port to
# created IG, you must run the following commands after creation of the
# template:
#
# export DEPLOYMENT=<DEPLOYMENT NAME>
# export PRIMARY_ZONE=<PRIMARY ZONE>
# export SECONDARY_ZONE=<SECONDARY ZONE>
#
# gcloud compute instance-groups unmanaged set-named-ports ${DEPLOYMENT}-frontend-pri-igm \
#  --named-ports http:8080,httpstatic:8080 \
#  --zone ${PRIMARY_ZONE}
#
# gcloud compute instance-groups unmanaged set-named-ports ${DEPLOYMENT}-frontend-sec-igm \
#  --named-ports http:8080,httpstatic:8080 \
#  --zone ${SECONDARY_ZONE}
#
# Then to see the IP that exposes the application, you can do:
# gcloud compute forwarding-rules list | grep application-${DEPLOYMENT}-l7lb

imports:
- path: application.jinja

resources:
- name: nodejs
  type: application.jinja
  properties:
    primaryZone: ZONE_TO_RUN
    secondaryZone: SECOND_ZONE_TO_RUN
    backendImage: gcr.io/deployment-manager-examples/mysql
    frontendImage: gcr.io/deployment-manager-examples/nodejsservice
    staticImage: gcr.io/deployment-manager-examples/nodejsservicestatic

Python

# Copyright 2016 Google Inc. All rights reserved.
#
# 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.

# Launches an autoscaled, load-balanced frontend in two zones running nodejs
# for serving traffic using L7 loadbalancing. Also launches a single MySQL
# container instance, wires the two together using references, and passes
# them as env variables to the underlying frontend Docker containers.
#
# NOTE: Due to the fact that IGM does not allow specifying service/port to
# created IG, you must run the following commands after creation of the
# template:
#
# export DEPLOYMENT=<DEPLOYMENT NAME>
# export PRIMARY_ZONE=<PRIMARY ZONE>
# export SECONDARY_ZONE=<SECONDARY ZONE>
#
# gcloud compute instance-groups unmanaged set-named-ports ${DEPLOYMENT}-frontend-pri-igm \
#  --named-ports http:8080,httpstatic:8080 \
#  --zone ${PRIMARY_ZONE}
#
# gcloud compute instance-groups unmanaged set-named-ports ${DEPLOYMENT}-frontend-sec-igm \
#  --named-ports http:8080,httpstatic:8080 \
#  --zone ${SECONDARY_ZONE}
#
# Then to see the IP that exposes the application, you can do:
# gcloud compute forwarding-rules list | grep application-${DEPLOYMENT}-l7lb

imports:
- path: application.py

resources:
- name: nodejs
  type: application.py
  properties:
    primaryZone: ZONE_TO_RUN
    secondaryZone: SECOND_ZONE_TO_RUN
    backendImage: gcr.io/deployment-manager-examples/mysql
    frontendImage: gcr.io/deployment-manager-examples/nodejsservice
    staticImage: gcr.io/deployment-manager-examples/nodejsservicestatic

Konfiguration bereitstellen

Jetzt können Sie Ihre Ressourcen bereitstellen. Führen Sie mit dem Befehlszeilentool gcloud den folgenden Befehl aus. Optional können Sie advanced-configuration-l7 durch einen Bereitstellungsnamen Ihrer Wahl ersetzen. Beachten Sie, dass Ihr Bereitstellungsname automatisch verwendet wird, um die Ressourcen zu benennen.

In diesem Beispiel ist der Name der Bereitstellung advanced-configuration-l7. Denken Sie daran, diesen Bereitstellungsnamen in allen folgenden Beispielen zu verwenden, falls Sie sich dazu entscheiden, den Namen der Bereitstellung zu ändern.

gcloud deployment-manager deployments create advanced-configuration-l7 --config application.yaml

Die Antwort sollte ähnlich aussehen, wie die folgenden Ressourcen:

Waiting for create operation-1469468950934-5387966d431f0-49b11bc4-1421b2f0...done.
Create operation operation-1469468950934-5387966d431f0-49b11bc4-1421b2f0 completed successfully.
NAME                                               TYPE                             STATE      ERRORS
advanced-configuration-l7-application-fw           compute.v1.firewall              COMPLETED  []
advanced-configuration-l7-application-l7lb         compute.v1.globalForwardingRule  COMPLETED  []
advanced-configuration-l7-application-targetproxy  compute.v1.targetHttpProxy       COMPLETED  []
advanced-configuration-l7-application-urlmap       compute.v1.urlMap                COMPLETED  []
advanced-configuration-l7-backend                  compute.v1.instance              COMPLETED  []
advanced-configuration-l7-frontend-bes             compute.v1.backendService        COMPLETED  []
advanced-configuration-l7-frontend-hc              compute.v1.httpHealthCheck       COMPLETED  []
advanced-configuration-l7-frontend-it              compute.v1.instanceTemplate      COMPLETED  []
advanced-configuration-l7-frontend-pri-as          compute.v1.autoscaler            COMPLETED  []
advanced-configuration-l7-frontend-pri-igm         compute.v1.instanceGroupManager  COMPLETED  []
advanced-configuration-l7-frontend-sec-as          compute.v1.autoscaler            COMPLETED  []
advanced-configuration-l7-frontend-sec-igm         compute.v1.instanceGroupManager  COMPLETED  []
advanced-configuration-l7-static-service-bes       compute.v1.backendService        COMPLETED  []
advanced-configuration-l7-static-service-hc        compute.v1.httpHealthCheck       COMPLETED  []
advanced-configuration-l7-static-service-it        compute.v1.instanceTemplate      COMPLETED  []
advanced-configuration-l7-static-service-pri-as    compute.v1.autoscaler            COMPLETED  []
advanced-configuration-l7-static-service-pri-igm   compute.v1.instanceGroupManager  COMPLETED  []
advanced-configuration-l7-static-service-sec-as    compute.v1.autoscaler            COMPLETED  []
advanced-configuration-l7-static-service-sec-igm   compute.v1.instanceGroupManager  COMPLETED  []

Dienst-Labels hinzufügen

Legen Sie als Nächstes die passenden Dienst-Labels für ihre verwalteten Instanzgruppen fest. Dienst-Labels sind Metadaten, die von den Lastenausgleichsdiensten zur Gruppierung von Ressourcen verwendet werden.

Führen Sie die folgenden Befehle aus, wobei Sie für die primäre und sekundäre Zone die Zonen angeben, die Sie in der Konfigurationsdatei für Ihre Bereitstellung ausgewählt haben, um Dienst-Labels hinzuzufügen:

gcloud compute instance-groups unmanaged set-named-ports advanced-configuration-l7-frontend-pri-igm \
  --named-ports http:8080,httpstatic:8080 \
  --zone [PRIMARY_ZONE]

gcloud compute instance-groups unmanaged set-named-ports advanced-configuration-l7-frontend-sec-igm \
  --named-ports http:8080,httpstatic:8080 \
  --zone [SECONDARY_ZONE]

Konfiguration testen

Rufen Sie zum Testen Ihrer Konfiguration die externe IP-Adresse ab, über die der Datenverkehr läuft, indem Sie die Weiterleitungsregel abfragen:

gcloud compute forwarding-rules list | grep advanced-configuration-l7-l7lb
advanced-configuration-l7-l7lb             107.178.249.126 TCP         advanced-configuration-l7-targetproxy

In diesem Fall ist die externe IP 107.178.249.126.

Besuchen Sie in einem Browser die externe IP-Adresse über Port 8080. Wenn beispielsweise Ihre externe IP 107.178.249.126 ist, wäre die URL:

http://107.178.249.126:8080

Es sollte eine leere Seite angezeigt werden. Posten Sie dann eine Nachricht auf der Seite. Wechseln Sie zur folgenden URL:

http://107.178.249.126:8080?msg=hello_world!

Es wird bestätigt, dass Ihre Nachricht hinzugefügt wurde. Navigieren Sie zurück zur Haupt-URL und die Seite sollte jetzt folgende Meldung enthalten:

hello_world!

Sie können auch die von Ihnen erstellte statische Seite besuchen oder eine Systemdiagnose Ihrer Anwendung durchführen, indem Sie die folgenden URLs aufrufen:

# Static web page
http://107.178.249.126:8080/static

# Health check
http://107.178.249.126:8080/_ah/health

Gratulation! Sie haben Ihre Konfiguration erfolgreich bereitgestellt.

Docker-Images erstellen (optional)

Docker ermöglicht die Automatisierung und Ausführung von Software in Containern. Container erlauben es Ihnen, verschiedene Dienste in Containern zu isolieren, die alle auf einer einzelnen Linux-Instanz ausgeführt werden können.

In diesem Beispiel werden einige vorhandene Docker-Images verwendet, aber Sie können auch eigene Versionen dieser Docker-Images erstellen. Anleitungen zur Erstellung von MySQL-Back-End-Images und nodejs-Front-End-Images finden Sie im Abschnitt Docker-Images erstellen.

So erstellen Sie das Docker-Image, das von der statischen Webseite verwendet wird:

  1. Erstellen Sie eine neue VM-Instanz mit einem containeroptimierten Image:

    gcloud compute instances create docker-playground \
      --image-family container-vm \
      --image-project google-containers \
      --zone us-central1-a \
      --machine-type f1-micro
    
  2. Stellen Sie eine Verbindung zu der Instanz her:

    gcloud compute ssh --zone us-central1-a docker-playground
    
  3. Erstellen Sie eine Datei mit dem Namen Dockerfile mit folgendem Inhalt:

    FROM node:latest
    
    RUN mkdir /var/www/
    ADD service.js /var/www/service.js
    WORKDIR /var/www/
    RUN npm install mysql
    
    CMD ["node", "service.js"]
    
  4. Erstellen Sie eine Datei mit dem Namen service.js mit folgendem Inhalt:

    var http = require('http');
    var url = require('url');
    
    console.log('Started static node server')
    
    http.createServer(function (req, res) {
      reqUrl = url.parse(req.url, true);
    
      res.useChunkedEncodingByDefault = false;
      res.writeHead(200, {'Content-Type': 'text/html'});
    
      if (reqUrl.pathname == '/_ah/health') {
        res.end('ok');
      } else if (reqUrl.pathname == '/exit') {
        process.exit(-1)
      } else {
          res.end('static server');
      }
    }).listen(8080, '0.0.0.0');
    
    console.log('Static server running at http://127.0.0.1:8080/');
    
  5. Erstellen Sie das Docker-Image und ersetzen Sie dabei username durch Ihren Docker Hub-Nutzernamen. Wenn Sie keinen Docker Hub-Nutzernamen haben, erstellen Sie einen, bevor Sie das Docker-Image erstellen.

    sudo docker build --no-cache -t username/nodejsservicestatic .
    
  6. Übertragen Sie die Images per Push in das Docker-Repository:

    sudo docker push username/nodejsservicestatic
    

Jetzt haben Sie die Docker-Images für die Ausführung von node.js und MySQL. Diese Images können im Repository angezeigt werden, indem Sie nach den Image-Namen suchen. Sie können die Images testen oder alle Instanzen von gcr.io/deployment-manager-examples/mysql und gcr.io/deployment-manager-examples/nodejsservice durch Ihre jeweiligen Images ersetzen.

Weitere Informationen

Wenn Sie dieses Beispiel abgeschlossen haben, können Sie:

  • Auf diesem Beispiel aufbauen, indem Sie eine robustere Webseite erstellen oder dem Webserver weitere Dienste hinzufügen.
  • Sich eingehender über Konfigurationen und Bereitstellungen informieren.
  • Eigene Konfigurationen erstellen.
Hat Ihnen diese Seite weitergeholfen? Teilen Sie uns Ihr Feedback mit:

Feedback geben zu...

Cloud Deployment Manager-Dokumentation