Dusty

I have an Azure Container Registry and I'm cheap.

To make sure that I don't flood my container registry with images and end up paying for extra storage, I built this quick and dirty utility.

It's written in Go because I wanted to play with the language - it's not elegant and there is likely room for improvement. Issues and PRs welcome.

Installation

Clone the repo and go build

Usage

(Assuming Azure) Configure a Service Principal with Contributor access to your Container Registry.

There are two ways to use Dusty:

CLI

❯ ./dusty -h
Usage of ./dusty:
  -d	Perform a dry run
  -l int
    	Number of tags you'd like to keep for each image (shorthand)
  -limit int
    	Number of tags you'd like to keep for each image
  -p string
    	Client ID/User for authentication (shorthand)
  -password string
    	Secret / Password for authentication
  -r string
    	Name of your Azure Container Registry (shorthand)
  -registry string
    	Name of your Azure Container Registry
  -u string
    	Client ID / User for authentication (shorthand)
  -user string
    	Client ID / User for authentication
  -v	Enable verbose logging

I'd recommend performing a dry run with the -d flag before an actual run to ensure you're happy. I won't be held responsible for cleaning out your registry.

Docker

You can deploy Dusty anywhere you can place a Docker container (kubernetes cron job, perhaps).

Instead of passing command-line arguments, you can instead set some environment variables:

Environment Variable Name	Description
DUSTY_REG_NAME	Container registry name or URL
DUSTY_CLIENT_ID	Client ID
DUSTY_CLIENT_SECRET	Client Secret/Password
DUSTY_TAG_LIMIT	How many images you'd like to remain in each repository