update docker container

Exploring and maintaining updated docker containers can significantly elevate your software environment efficiency. Here’s a simple tutorial on how to update your Docker container.

Pre-requisites

Before getting started, ensure that Docker is installed on your machine. You should be familiar with basic Docker commands and concepts like images and containers.

Step 1: Pull the Updated Image

The first step involves pulling the updated image from Docker Hub. Docker images are the basis of containers.

docker pull your_image_name

This command will fetch the latest version of the specified image.

Step 2: Stop the Running Container

Once you have the updated image, the next step is to stop the currently running container. You can do this using the command:

docker stop your_container_name

Use the Docker ps command to list all running containers if you don’t know your container’s name.

Step 3: Remove the Old Container

After successfully stopping the container, you now have to remove the old Docker container. This can be done using the ‘docker rm’ command.

docker rm your_container_name

This command removes the container permanently, so ensure you’ve backup if necessary.

Step 4: Create and Start Your New Container

Now that the old container has been removed, you can create and start a new container from the updated image.

docker run -d -p 8080:8080 --name=your_container_name your_image_name

This command creates a new container and starts it. The ‘-d’ option is used to run the container in detached mode, meaning it runs in the background. The ‘-p’ option maps the host’s port to the container’s port.

By following these steps, you should now be working with an updated Docker container. It’s crucial to regularly update your containers to benefit from new features, improvements, or security patches in newer versions. Regular updates also increase the overall system performance and guarantee efficient software operations.