Files used in the medium series

compute_vm.js

{
  "kind": "compute#instance",
  "name": "instance-1",
  "zone": "projects/your-project/zones/us-central1-a",
  "machineType": "projects/your-project/zones/us-central1-a/machineTypes/f1-micro",
  "displayDevice": {
    "enableDisplay": false
  },
  "metadata": {
    "kind": "compute#metadata",
    "items": [
      {
        "key": "startup-script",
        "value": "gcloud logging write batch-execution \"Hello world from $(hostname).\"\ngcp_zone=$(curl -H Metadata-Flavor:Google http://metadata.google.internal/computeMetadata/v1/instance/zone -s | cut -d/ -f4)\ngcloud compute instances delete $(hostname) --zone ${gcp_zone}"
      }
    ]
  },
  "tags": {
    "items": []
  },
  "disks": [
    {
      "kind": "compute#attachedDisk",
      "type": "PERSISTENT",
      "boot": true,
      "mode": "READ_WRITE",
      "autoDelete": true,
      "deviceName": "instance-1",
      "initializeParams": {
        "sourceImage": "projects/debian-cloud/global/images/debian-9-stretch-v20190729",
        "diskType": "projects/your-project/zones/us-central1-a/diskTypes/pd-standard",
        "diskSizeGb": "10"
      },
      "diskEncryptionKey": {}
    }
  ],
  "canIpForward": false,
  "networkInterfaces": [
    {
      "kind": "compute#networkInterface",
      "subnetwork": "projects/your-project/regions/us-central1/subnetworks/default",
      "accessConfigs": [
        {
          "kind": "compute#accessConfig",
          "name": "External NAT",
          "type": "ONE_TO_ONE_NAT",
          "networkTier": "PREMIUM"
        }
      ],
      "aliasIpRanges": []
    }
  ],
  "description": "",
  "labels": {},
  "scheduling": {
    "preemptible": false,
    "onHostMaintenance": "MIGRATE",
    "automaticRestart": true,
    "nodeAffinities": []
  },
  "deletionProtection": false,
  "reservationAffinity": {
    "consumeReservationType": "ANY_RESERVATION"
  },
  "serviceAccounts": [
    {
      "email": "compute-execute-batch-job@your-project.iam.gserviceaccount.com",
      "scopes": [
        "https://www.googleapis.com/auth/cloud-platform"
      ]
    }
  ]
}

create_instance_function.js

const Buffer = require('safe-buffer').Buffer;
const Compute = require('@google-cloud/compute');
const compute = new Compute();

const zone = 'us-central1-a';

// We are going to add our vm configuration in the next step
// const vmConfig = ...

exports.createInstance = (event, context) => {
  const vmName = 'batch-job-executor' + Date.now();
  try {
    compute.zone(zone)
      .createVM(vmName, vmConfig)
      .then(data => {
        // Operation pending.
        const vm = data[0];
        const operation = data[1];
        console.log(`VM being created: ${vm.id}`);
        console.log(`Operation info: ${operation.id}`);
        return operation.promise();
      })
      .then(() => {
        const message = 'VM created with success, Cloud Function finished execution.';
        console.log(message);
      })
      .catch(err => {
        console.log(err);
      });
  } catch (err) {
    console.log(err);
  }
};

create_instance_function_with_vm.js

const Buffer = require('safe-buffer').Buffer;
const Compute = require('@google-cloud/compute');
const compute = new Compute();

const zone = 'us-central1-a';

const vmConfig = {
  kind: 'compute#instance',
  zone: 'projects/your-project/zones/us-central1-a',
  machineType: 'projects/your-project/zones/us-central1-a/machineTypes/f1-micro',
  displayDevice: {
    enableDisplay: false
  },
  metadata: {
    kind: 'compute#metadata',
    items: [
      {
        key: 'startup-script',
        value: 'gcloud logging write batch-execution \'Hello world from $(hostname).\'\ngcp_zone=$(curl -H Metadata-Flavor:Google http://metadata.google.internal/computeMetadata/v1/instance/zone -s | cut -d/ -f4)\ngcloud compute instances delete $(hostname) --zone ${gcp_zone}'
      }
    ]
  },
  tags: {
    items: []
  },
  disks: [
    {
      kind: 'compute#attachedDisk',
      type: 'PERSISTENT',
      boot: true,
      mode: 'READ_WRITE',
      autoDelete: true,
      deviceName: 'instance-1',
      initializeParams: {
        sourceImage: 'projects/debian-cloud/global/images/debian-9-stretch-v20190729',
        diskType: 'projects/your-project/zones/us-central1-a/diskTypes/pd-standard',
        diskSizeGb: '10'
      },
      diskEncryptionKey: {}
    }
  ],
  canIpForward: false,
  networkInterfaces: [
    {
      kind: 'compute#networkInterface',
      subnetwork: 'projects/your-project/regions/us-central1/subnetworks/default',
      accessConfigs: [
        {
          kind: 'compute#accessConfig',
          name: 'External NAT',
          type: 'ONE_TO_ONE_NAT',
          networkTier: 'PREMIUM'
        }
      ],
      aliasIpRanges: []
    }
  ],
  description: '',
  labels: {},
  scheduling: {
    preemptible: false,
    onHostMaintenance: 'MIGRATE',
    automaticRestart: true,
    nodeAffinities: []
  },
  deletionProtection: false,
  reservationAffinity: {
    consumeReservationType: 'ANY_RESERVATION'
  },
  serviceAccounts: [
    {
      email: 'compute-execute-batch-job@your-project.iam.gserviceaccount.com',
      scopes: [
        'https://www.googleapis.com/auth/cloud-platform'
      ]
    }
  ]
}

exports.createInstance = (event, context) => {
  const vmName = 'batch-job-executor' + Date.now();
  try {
    compute.zone(zone)
      .createVM(vmName, vmConfig)
      .then(data => {
        // Operation pending.
        const vm = data[0];
        const operation = data[1];
        console.log(`VM being created: ${vm.id}`);
        console.log(`Operation info: ${operation.id}`);
        return operation.promise();
      })
      .then(() => {
        const message = 'VM created with success, Cloud Function finished execution.';
        console.log(message);
      })
      .catch(err => {
        console.log(err);
      });
  } catch (err) {
    console.log(err);
  }
};

create_vm_package.json

{
    "name": "cloud-functions-create-batch-workload-vm",
    "version": "0.0.1",
    "private": true,
    "license": "Apache-2.0",
    "author": "Marcelo Costa",
    "main": "index.js",
    "engines": {
        "node": ">=8.13.0"
    },
    "scripts": {
        "test": "mocha test/*.test.js --timeout=20000"
    },
    "devDependencies": {
        "@google-cloud/nodejs-repo-tools": "^3.3.0",
        "mocha": "^6.0.0",
        "proxyquire": "^2.0.0",
        "sinon": "^7.0.0"
    },
    "dependencies": {
        "@google-cloud/compute": "1.0.1",
        "safe-buffer": "^5.1.2"
    }
}

hello_world_start_up.sh

gcloud logging write batch-execution "Hello world from $(hostname)."
gcp_zone=$(curl -H Metadata-Flavor:Google http://metadata.google.internal/computeMetadata/v1/instance/zone -s | cut -d/ -f4)
gcloud compute instances delete $(hostname) --zone ${gcp_zone}