Setting labels on GCP Compute Instances using Golang - go

Question

I was looking for ways to set or update instance Labels on GCP Compute Instance and labelFingerprint confused me.
then I figure it out and I'm putting the code in the answer section.

Answer 1

I used this simple code to add new labels to GCP instances.
package main
import (
"context"
"log"
"os"
"golang.org/x/oauth2/google"
"google.golang.org/api/compute/v1"
)
func main() {
addLabelToGCPInstances()
}
func addLabelToGCPInstances() error {
// You can pass these as args
project := "Your GCP Project ID"
zone := "europe-west2-a"
instance := "milad-test-instance"
prodLablesMap := map[string]string{
"production": "true",
"environment": "production",
}
ctx := context.Background()
os.Setenv("GOOGLE_APPLICATION_CREDENTIALS", "gke.json")
c, err := google.DefaultClient(ctx, compute.CloudPlatformScope)
if err != nil {
return err
}
computeService, err := compute.New(c)
if err != nil {
return err
}
respInstance, err := computeService.Instances.Get(project, zone, instance).Context(ctx).Do()
if err != nil {
log.Fatal(err)
}
rb := &compute.InstancesSetLabelsRequest{
Labels: prodLablesMap,
LabelFingerprint: respInstance.LabelFingerprint,
}
respLabels, err := computeService.Instances.SetLabels(project, zone, instance, rb).Context(ctx).Do()
if err != nil {
log.Fatal(err)
}
_ = respLabels
return err
}
This is just an example you can work around and do more error handling and etc.