Docker Hub & Pushing Docker Images
• Why We Need Docker Hub: Docker Hub is like a social media platform, but instead of sharing photos or updates, we share Docker images. Docker Hub provides a centralized place for storing and managing these images. We use Docker Hub to:
◦ Share our Docker images with others.
◦ Store different versions of our Docker images.
◦ Access our Docker images from any machine, making deployment and scaling much easier.
◦ Find and use Docker images created by others, which can be very helpful.
• How to Push a Docker Image to Docker Hub: To push a Docker image, we follow a few simple steps:
a. Log In: Just like logging into your favorite app, we log in to Docker Hub on our computer.
b. Tagging: We give our image a label (or a tag) that describes what it is and which version it is—kind of like tagging a friend in a photo docker tag flix-rails:latest nishanthmathiyazhagan/flix-rails:latest
c. Pushing: With our image tagged, we ‘push’ it to Docker Hub, which means uploading it so others can download and use it.
docker push nishanthmathiyazhagan/flix-rails:latest
• What Happens After Pushing the Image to Docker Hub: Once the image is pushed:
◦ It’s stored in our Docker Hub repository,
◦ Other people can ‘pull’ the image to their own computers or servers to run the application it contains.
◦ If we update the application, we can push the new version to Docker Hub so everyone can get the update.
◦ We can pull it down on any server
#devops #docker