Docker Force a Rebuild - Shell-Bash

Docker is a popular tool for containerization in software development. It allows developers to create and manage containers that encapsulate an application and all its dependencies. One of the benefits of using Docker is that it enables fast and reliable builds. However, there are times when you need to force a rebuild of a Docker image.

In this article, we will discuss how to force a rebuild of a Docker image using Shell-Bash commands.

Basic Docker Build Commands

Before we discuss how to force a rebuild, let's review the basic Docker build commands.

To build a Docker image from a Docker file, run the following command in the terminal:

docker build -t <image-name> <dockerfile-path>

Here, <image-name> is the name you want to give to the image and <dockerfile-path> is the path to the Docker file. If the Docker file is in the current directory, you can use . as the <dockerfile-path>.

How to Force a Rebuild

There are a few reasons why you might need to force a rebuild of a Docker image. For example, you may have updated the Docker file or one of its dependencies, or you may have encountered errors during the build process.

To force a rebuild of a Docker image, you can use the --no-cache flag with the docker build command. This flag tells Docker to not use any cached layers and to rebuild all layers from scratch.

Here is an example of how to force a rebuild of a Docker image:

docker build -t <image-name> --no-cache <dockerfile-path>

After running this command, Docker will build a new image from scratch, even if there are cached layers available.

Conclusion

In this article, we discussed how to force a rebuild of a Docker image using Shell-Bash commands. By using the --no-cache flag with the docker build command, you can ensure that Docker builds all layers from scratch, even if cached layers are available. This can be useful for situations where you need to update a Docker file or its dependencies, or when you encounter errors during the build process.