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Customizing images using docker commit

The general recommendation is that all Docker images should be built from a Dockerfile to create clean and proper image layers without unwanted temporary and log files, despite the fact that some vendors deliver their Docker images without an available Dockerfile . If there is a need to modify that existing image, you can use the standard docker commit functionality to convert an existing container to a new image.

As an example, we will try to modify our existing httpd container and make an image from it.

First, we need to get the httpd image:

$ docker pull httpdUsing default tag: latestTrying to pull repository docker.io/library/httpd ...latest: Pulling from docker.io/library/httpd...output truncated ...