main.go

// Copyright 2017 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.

package main

import (
	"context"
	"log"

	"google.golang.org/api/compute/v1"
	"google.golang.org/api/googleapi"
	"golang.org/x/oauth2/jwt"
)

func main() {
	projectId := ""
	instanceName := "test"

	clientScopes := []string{
		"https://www.googleapis.com/auth/compute",
		"https://www.googleapis.com/auth/cloud-platform",
		"https://www.googleapis.com/auth/ndev.clouddns.readwrite",
		"https://www.googleapis.com/auth/devstorage.full_control",
	}

	conf := jwt.Config{
		Email:      "",
		PrivateKey: []byte(``),
		Scopes:     clientScopes,
		TokenURL:   "https://accounts.google.com/o/oauth2/token",
	}

	client := conf.Client(context.Background())

	computeService, err := compute.New(client)
	if err != nil {
		log.Fatal(err)
	}

	prefix := "https://www.googleapis.com/compute/v1/projects/" + projectId
	imageURL := "https://www.googleapis.com/compute/v1/projects/debian-cloud/global/images/debian-7-wheezy-v20140606"
	zone := "us-central1-a"

	// Show the current images that are available.
	res, err := computeService.Images.List(projectId).Do()
	log.Printf("Got compute.Images.List, err: %#v, %v", res, err)

	instance := &compute.Instance{
		Name:        instanceName,
		Description: "compute sample instance",
		MachineType: prefix + "/zones/" + zone + "/machineTypes/n1-standard-1",
		Disks: []*compute.AttachedDisk{
			{
				AutoDelete: true,
				Boot:       true,
				Type:       "PERSISTENT",
				InitializeParams: &compute.AttachedDiskInitializeParams{
					DiskName:    "my-root-pd",
					SourceImage: imageURL,
				},
			},
		},
		NetworkInterfaces: []*compute.NetworkInterface{
			{
				AccessConfigs: []*compute.AccessConfig{
					{
						Type: "ONE_TO_ONE_NAT",
						Name: "External NAT",
					},
				},
				Network: prefix + "/global/networks/default",
			},
		},
		ServiceAccounts: []*compute.ServiceAccount{
			{
				Email: "default",
				Scopes: []string{
					compute.DevstorageFullControlScope,
					compute.ComputeScope,
				},
			},
		},
	}

	op, err := computeService.Instances.Insert(projectId, zone, instance).Do()
	log.Printf("Got compute.Operation, err: %#v, %v", op, err)

	if err != nil {
		log.Fatal(err)
	}
	etag := op.Header.Get("Etag")
	log.Printf("Etag=%v", etag)

	inst, err := computeService.Instances.Get(projectId, zone, instanceName).IfNoneMatch(etag).Do()
	log.Printf("Got compute.Instance, err: %#v, %v", inst, err)
	if googleapi.IsNotModified(err) {
		log.Printf("Instance not modified since insert.")
	} else {
		log.Printf("Instance modified since insert.")
	}
}