How to login to Docker Private Registry?

Docker Registry is a tool used to store and distribute Docker images. The private registry is a Docker registry that is not publicly accessible and generally used to store confidential images. This tutorial will discuss how to log in to a private registry in Docker.

Configuring Docker to Use a Private Registry

Before you can log in to a private registry, you need to configure Docker to use it. To do this, you must create or modify the /etc/docker/daemon.json file.

You can use the following command to create the file if it does not exist: sudo vim /etc/docker/daemon.json
Add the following lines to the file:

{
  "insecure-registries": ["docker.codetryout.com:5000"]
}

Replace myregistry.example.com:5000 with the address of your private registry. This will allow Docker to connect to the private registry without using encryption.

Logging in to a Private Registry

Once you have configured Docker to use your private registry, you can log in to it using the docker login command:
docker login docker.codetryout.com:5000
Replace myregistry.example.com:5000 with the address of your private registry. You will be prompted for your username and password. Enter the credentials that you used to create your account on the private registry.

Pushing Images to a Private Registry

After logging in to your private registry, you can push images to it using the docker push command:
docker push docker.codetryout.com:5000/myimage:mytag
Replace myregistry.example.com:5000 with the address of your private registry, myimage with the name of your image, and mytag with the tag you want to assign to your image.

Conclusion

We have discussed how to log in to a private Docker registry. We have also talked about how to configure Docker to use a private registry and how to push images to it. Following these steps, you can securely store and distribute your confidential Docker images.