chore(samples): add custom hostname instances samples (#650)

Author: FrodoTheTrue

compute/custom-hostname-instance/createInstanceWithCustomHostname.js

@@ -0,0 +1,123 @@
+// Copyright 2021 Google LLC
+//
+// 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 an instance with custom hostname.
+ *
+ * @param {string} projectId - ID of the project in which you want to create the VM instance.
+ * @param {string} zone - Name of the zone where you want to create the VM in, for example: us-west3-b.
+ * @param {string} instanceName - Name of the new VM instance.
+ * @param {string} hostname - Custom hostname of the new VM instance.
+ *    Custom hostnames must conform to RFC 1035 requirements for valid hostnames.
+ * @param {string} machineType - Machine type for the VM instance specified in the following format:
+ *    "zones/{zone}/machineTypes/{type_name}". For example:
+ *    "zones/europe-west3-c/machineTypes/f1-micro"
+ *    You can find the list of available machine types by using this gcloud command:
+ *    $ gcloud compute machine-types list
+ * @param {string} sourceImage - Path of the disk image you want to use for your boot
+ *    disk. This image can be one of the public images
+ *    (for example, "projects/...)
+ *    or a private image you have access to.
+ *    You can check the list of available public images using:
+ *    $ gcloud compute images list
+ * @param {string} networkName - Name of the network you want the new instance to use.
+ *    For example: global/networks/default - if you want to use the default network.
+ */
+function main(
+  projectId,
+  zone,
+  instanceName,
+  hostname,
+  machineType = 'n1-standard-1',
+  sourceImage = 'projects/debian-cloud/global/images/family/debian-10',
+  networkName = 'global/networks/default'
+) {
+  // [START compute_instances_create_custom_hostname]
+  /**
+   * TODO(developer): Uncomment and replace these variables before running the sample.
+   */
+  // const projectId = 'YOUR_PROJECT_ID';
+  // const zone = 'europe-central2-b'
+  // const instanceName = 'YOUR_INSTANCE_NAME'
+  // const hostname = 'host.example.com'
+  // const machineType = 'n1-standard-1';
+  // const sourceImage = 'projects/debian-cloud/global/images/family/debian-10';
+  // const networkName = 'global/networks/default';
+
+  const compute = require('@google-cloud/compute');
+  const computeProtos = compute.protos.google.cloud.compute.v1;
+
+  // Create a new instance with the values provided above in the specified project and zone.
+  async function createInstanceWithCustomHostname() {
+    const instancesClient = new compute.InstancesClient();
+
+    console.log(
+      `Creating the ${instanceName} instance in ${zone} with hostname ${hostname}...`
+    );
+
+    const [response] = await instancesClient.insert({
+      instanceResource: {
+        name: instanceName,
+        // Custom hostnames are not resolved by the automatically created records
+        // provided by Compute Engine internal DNS.
+        // You must manually configure the DNS record for your custom hostname.
+        hostname,
+        disks: [
+          {
+            // Describe the size and source image of the boot disk to attach to the instance.
+            initializeParams: {
+              diskSizeGb: '10',
+              sourceImage,
+            },
+            autoDelete: true,
+            boot: true,
+            type: computeProtos.AttachedDisk.Type.PERSISTENT,
+          },
+        ],
+        machineType: `zones/${zone}/machineTypes/${machineType}`,
+        networkInterfaces: [
+          {
+            // Use the network interface provided in the networkName argument.
+            name: networkName,
+          },
+        ],
+      },
+      project: projectId,
+      zone,
+    });
+    let operation = response.latestResponse;
+    const operationsClient = new compute.ZoneOperationsClient();
+
+    // Wait for the create operation to complete.
+    while (operation.status !== 'DONE') {
+      [operation] = await operationsClient.wait({
+        operation: operation.name,
+        project: projectId,
+        zone: operation.zone.split('/').pop(),
+      });
+    }
+
+    console.log('Instance created.');
+  }
+
+  createInstanceWithCustomHostname();
+  // [END compute_instances_create_custom_hostname]
+}
+
+process.on('unhandledRejection', err => {
+  console.error(err.message);
+  process.exitCode = 1;
+});
+
+main(...process.argv.slice(2));

compute/custom-hostname-instance/getInstanceHostname.js

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+// Copyright 2021 Google LLC
+//
+// 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.
+
+/**
+ * Prints the hostname of the Google Cloud VM instance.
+ *
+ * @param {string} projectId - ID of the project in which you want to get the VM instance hostname.
+ * @param {string} zone - Name of the zone your instance belongs to, for example: us-west3-b.
+ * @param {string} instanceName - Name of the new VM instance.
+ */
+function main(projectId, zone, instanceName) {
+  // [START compute_instances_get_hostname]
+  /**
+   * TODO(developer): Uncomment and replace these variables before running the sample.
+   */
+  // const projectId = 'YOUR_PROJECT_ID';
+  // const zone = 'europe-central2-b'
+  // const instanceName = 'YOUR_INSTANCE_NAME'
+
+  const compute = require('@google-cloud/compute');
+
+  async function getInstanceHostname() {
+    const instancesClient = new compute.InstancesClient();
+
+    const [instance] = await instancesClient.get({
+      project: projectId,
+      zone,
+      instance: instanceName,
+    });
+    // If a custom hostname is not set, the output for instance.hostname will be undefined
+    console.log(`Instance ${instanceName} has hostname: ${instance.hostname}`);
+  }
+
+  getInstanceHostname();
+  // [END compute_instances_get_hostname]
+}
+
+process.on('unhandledRejection', err => {
+  console.error(err.message);
+  process.exitCode = 1;
+});
+
+main(...process.argv.slice(2));

compute/test/customHostnameInstance.test.js

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+// Copyright 2021 Google LLC
+//
+// 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.
+
+'use strict';
+
+const compute = require('@google-cloud/compute');
+
+const {describe, it} = require('mocha');
+const uuid = require('uuid');
+const cp = require('child_process');
+const {assert} = require('chai');
+
+const instancesClient = new compute.InstancesClient();
+
+const execSync = cmd => cp.execSync(cmd, {encoding: 'utf-8'});
+
+const getInstance = async (projectId, zone, instanceName) => {
+  const [instance] = await instancesClient.get({
+    project: projectId,
+    zone,
+    instance: instanceName,
+  });
+  return instance;
+};
+
+describe('Instance with a custom hostname samples', () => {
+  const instanceName = `gcloud-test-instance-${uuid.v4().split('-')[0]}`;
+  const zone = 'europe-central2-b';
+  const custom_hostname = 'host.domain.com';
+
+  it('should create instance with a custom hostname and return correct hostname', async () => {
+    const projectId = await instancesClient.getProjectId();
+    let output = execSync(
+      `node custom-hostname-instance/createInstanceWithCustomHostname ${projectId} ${zone} ${instanceName} ${custom_hostname}`
+    );
+
+    const instance = await getInstance(projectId, zone, instanceName);
+
+    assert.equal(instance.hostname, custom_hostname);
+    assert.match(output, /Instance created./);
+
+    output = execSync(
+      `node custom-hostname-instance/getInstanceHostname ${projectId} ${zone} ${instanceName}`
+    );
+
+    assert.include(
+      output,
+      `Instance ${instanceName} has hostname: ${custom_hostname}`
+    );
+
+    execSync(`node deleteInstance ${projectId} ${zone} ${instanceName}`);
+  });
+
+  it('should return undefined if hostname is not set', async () => {
+    const projectId = await instancesClient.getProjectId();
+
+    execSync(`node createInstance ${projectId} ${zone} ${instanceName}`);
+    const output = execSync(
+      `node custom-hostname-instance/getInstanceHostname ${projectId} ${zone} ${instanceName}`
+    );
+
+    assert.include(output, `Instance ${instanceName} has hostname: undefined`);
+
+    execSync(`node deleteInstance ${projectId} ${zone} ${instanceName}`);
+  });
+});