Create N number of GCP compute instances using Rest api

Question

How to create n number of instances in GCP using rest api.
in AWS java SDK, there is a method withMaxCount where we specify number of ec2 instances.
Similarly is there anything for GCP compute.

The Google Cloud API does not have an equivalent to withMaxCount. The Google Cloud API is very easy to use. You can code a loop to create as many instances as your quota allows. The Google Cloud Console will show you the CLI command to create an instance. Use a shell script or you can add the command line option --log-http to can see the REST API to duplicate that command. Tip: look into using Terraform for deployments and skip using the API. — John Hanley
You are welcome. You have numerous tools, resources and options to build your infrastructure. — John Hanley
Do you want to create N GCE VM instances or GCE Managed Instance Group within REST API? — Serhii Rohoza

Sergiusz Sergiusz · Accepted Answer · 2021-02-01T07:49:52

You can use REST API in loop to create instances.
Example request will look something like this:

{
  "kind": "compute#instance",
  "name": "INSTANCE-NAME",
  "zone": "projects/PROJECT-NAME/zones/us-central1-a",
  "machineType": "projects/PROJECT-NAME/zones/us-central1-a/machineTypes/e2-medium",
  "displayDevice": {
    "enableDisplay": false
  },
  "metadata": {
    "kind": "compute#metadata",
    "items": []
  },
  "tags": {
    "items": []
  },
  "disks": [
    {
      "kind": "compute#attachedDisk",
      "type": "PERSISTENT",
      "boot": true,
      "mode": "READ_WRITE",
      "autoDelete": true,
      "deviceName": "INSTANCE-NAME",
      "initializeParams": {
        "sourceImage": "projects/debian-cloud/global/images/debian-10-buster-v20210122",
        "diskType": "projects/PROJECT-NAME/zones/us-central1-a/diskTypes/pd-standard",
        "diskSizeGb": "10",
        "labels": {}
      },
      "diskEncryptionKey": {}
    }
  ],
  "canIpForward": false,
  "networkInterfaces": [
    {
      "kind": "compute#networkInterface",
      "subnetwork": "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": "[email protected]",
      "scopes": [
        "https://www.googleapis.com/auth/devstorage.read_only",
        "https://www.googleapis.com/auth/logging.write",
        "https://www.googleapis.com/auth/monitoring.write",
        "https://www.googleapis.com/auth/servicecontrol",
        "https://www.googleapis.com/auth/service.management.readonly",
        "https://www.googleapis.com/auth/trace.append"
      ]
    }
  ],
  "shieldedInstanceConfig": {
    "enableSecureBoot": false,
    "enableVtpm": true,
    "enableIntegrityMonitoring": true
  },
  "confidentialInstanceConfig": {
    "enableConfidentialCompute": false
  }
}

Replace it with your own project name and service account, and you can test it here.

Create N number of GCP compute instances using Rest api

1 Answers