# Kaniko - Adding Extra Tags to Container Image

# Problem Statement 

I recently needed to add some extra tags to container images already published to the container image registry. I use Kaniko to build my images. 
Kaniko cannot directly add extra tags to a container image that has already been pushed to a container image registry without rebuilding or re-pushing. Kaniko's primary function is to build container images from a Dockerfile and push them to a registry.

# Alternative Approach 1

However, when you build an image with Kaniko, you can specify multiple tags for that image during the initial push. This is achieved by using the `--destination` flag multiple times in your Kaniko executor command. Each `--destination` flag specifies a different tag for the same image, and Kaniko will push the image with all of these specified tags simultaneously.

Example:

```
/kaniko/executor \
  --context /path/to/your/context \
  --dockerfile /path/to/your/Dockerfile \
  --destination your-registry/your-image:latest \
  --destination your-registry/your-image:v1.0.0 \
  --destination your-registry/your-image:commit-sha```

In this example, Kaniko would build the image and push it to `your-registry/your-image` with three different tags: `latest`, `v1.0.0`, and `commit-sha`.

# Alternative Approach 2

If an image has already been pushed to a registry and you need to add a new tag, you would typically use a tool designed for image management, such as Docker CLI or `crane`, to pull the image, add the new tag, and then push it back to the registry. Kaniko itself is not designed for this "retagging" operation on already existing images.