cloud.google.com/go/spanner/admin sample

main.go

package main

import (
	"context"
	"fmt"
	"google.golang.org/genproto/protobuf/field_mask"

	instance "cloud.google.com/go/spanner/admin/instance/apiv1"
	instancepb "google.golang.org/genproto/googleapis/spanner/admin/instance/v1"
)

func main() {
	ctx := context.Background()

	UpdateInstance(ctx)
}

func UpdateInstance(ctx context.Context) {
	c, err := instance.NewInstanceAdminClient(ctx)
	if err != nil {
		fmt.Printf("failed new admin client. err=%+v\n", err)
	}

	req := &instancepb.UpdateInstanceRequest{
		Instance: &instancepb.Instance{
			Name:      fmt.Sprintf("projects/%s/instances/%s", "gcpug-public-spanner", "merpay-sponsored-instance"),
			NodeCount: 3,
		},
		FieldMask: &field_mask.FieldMask{
			Paths: []string{"node_count"},
		},
	}
	op, err := c.UpdateInstance(ctx, req)
	if err != nil {
		fmt.Printf("failed new admin client. err=%+v\n", err)
	}

	resp, err := op.Wait(ctx)
	if err != nil {
		fmt.Printf("failed new admin client. err=%+v\n", err)
	}
	fmt.Printf("resp is %+v\n", resp)
}