how to push changes to docker hub?

Question

1) I have pushed image to docker hub with

docker push ucanmiracle/docker-learn:node-test-image

2) Added changes to my project file

3) pushing docker image with

docker push ucanmiracle/docker-learn:node-test-image1

But project changes didn't applied. How to properly push updates to docker hub?

Answer 1

You don't push project files to the registry, you push an image, which needs to be built from the project files first.

1: Run docker build -t ucanmiracle/docker-learn:node-test-image1 . It will build the image from the Dockerfile in current directory and tag it as ucanmiracle/docker-learn:node-test-image1 .

2: Then you run docker push ucanmiracle/docker-learn:node-test-image1 to push the image to Docker Hub.

Check this Link for more on building Docker images.

Answer 2

Step1:

Run below cmd from the folder where Dockerfile resides

docker build -t name_of_ image_with_version local_docker_dir_path

Ex:$ docker build -t base:1.0.0  .

Step2:

Get the docker image Tag id by running below cmd

$ docker images

if you are using docker.io ( dockerhub repo ), you need to tag it including the name docker.io in it.

docker tag ${image_id} docker.io/${login_name}/${image_name}

Ex: docker tag 86xc1fxyzabc9 docker.io/someone/image_name_in_docker_io

and then

docker push docker.io/${login_name}/${image_name}

Ex: docker push docker.io/someone/image_name_in_docker_io