Auto label your VMs

Automatically scan for instances and apply billing labels based on RegEx.

Why auto label 💸

If you have a large infrastructure it is difficult to go through all instances and label them. Keeping these up to date is time consuming. Using a simple regex you can ensure all your machines are labeled going forward. You can put this script in a cronjob to autolabel all your instances.

Example

One of our GKE clusters have VMS in this form:

gke-production-app-pool-1-ac1cda16-aheb 
gke-production-app-pool-1-bc2cda97-2hjf 
gke-production-app-pool-1-cc3cda66-bhcn 
....

We setup a simple match pattern:

module Config
MAP = {
        'gke-production-app' => ['rs-type' => 'gke',  'rs-dept'=>'infrastructure', 'rs-project' => 'gke-production-app'],
}
end

We can add more regex as well:

MAP = {
        'gke-production-app' => ['rs-type' => 'gke',  'rs-dept'=>'infrastructure', 'rs-project' => 'gke-production-app'],
        'gke-staging-app' => ['rs-type' => 'gke',  'rs-dept'=>'development', 'rs-project' => 'gke-staging-app'],
        'gke-email-sender-production' => ['rs-type' => 'vms',  'rs-dept'=>'backend', 'rs-project' => 'gke-email-sender-production'],
        'database-production' => ['rs-type' => 'vms',  'rs-dept'=>'backend', 'rs-project' => 'database-production'],         
}

View labels in billing

How to run

First install gcloud and ensure it is setup with your current project. https://cloud.google.com/sdk/docs/install

This script uses a simple config file and a regex to find machines and label them. Once it is setup you can use it to also identify machines that are unlabeled.

ruby run.rb 

The script should be ran in a cronjob. It uses 50 threads and handles 1000k vms under 30 seconds.