Tag Image Settlement For Free

You can also specify the Image tag you want to pull in the Dockerfile. Let's say you have a Dockerfile to pull an Ubuntu Image with the latest version. If you want to build the Image with a custom tag called my-ubuntu, you can use the following command. sudo docker build -t tag-demo:my-ubuntu .

Docker offers support to add labels into images as a way to add custom metadata on them. The label syntax on your Dockerfile is as follows: LABEL <key>=<value> <key>=<value> <key>=<value> ... The LABEL instruction adds metadata to an image.

Docker doesn't provide a one-liner rename operation. But, with the combination of tagging and removing, you can achieve the desired result: Step 1: Tag the existing image with the new name. Step 2: Once tagged successfully, you can remove the old tag or image.

You have just completed building a Dockerfile, and you are ready to push it to Docker Hub. First make sure that you have a Docker Hub account. Then build your image with the `VERSION` build argument that is set to `1.5`. Finally, tag the image to `latest`, and push both images to Docker Hub.

Docker tag SOURCE_IMAGE[:TAG] TARGET_IMAGE[:TAG] This command just creates an alias (a reference) by the name of the TARGET_IMAGE that refers to the SOURCE_IMAGE. That's all it does. It's like assigning an existing image another name to refer to it.

Tags are added to images using the docker tag command. Tags can also be attached when you're building an image with docker build by passing the -t flag. Both tags will now refer to the same image so you can start to use them interchangeably.

Tag a Docker image after the build process docker image tag : This is the base command that tells Docker you want to tag an image. SOURCE_IMAGE[:tag] : This is the name of the existing Docker image that you want to tag. TARGET_IMAGE[:tag] : This is the name you want to apply to the image.