How to force Docker for a clean build of an image?

 

To force Docker to perform a clean build of a Docker image, you can use the --no-cache flag with the docker build command. This flag tells Docker to ignore any cached layers and build the image from scratch. Here's an example:

Assuming you have a Dockerfile for your image in a directory, navigate to that directory in your terminal and run the following command to build the image without using any cached layers:

bash

docker build --no-cache -t your-image-name:tag .

Explanation of the command:

• --no-cache: This flag tells Docker not to use any cached layers during the build process.
• -t your-image-name:tag: This specifies the name and tag for your Docker image. Replace your-image-name with the desired name and tag with the desired version or tag for your image.
• .: This indicates the build context, which is the current directory where the Dockerfile is located.

After running this command, Docker will perform a clean build of the image, and no cached layers will be used. This can be useful when you want to ensure that the image is built from scratch, such as when you have made significant changes to your Dockerfile or dependencies.

Here's an example of building a Docker image without caching:

bash

docker build --no-cache -t my-app-image:v2 .

This command will build the my-app-image Docker image with version v2 without reusing any cached layers, ensuring a clean build.