How to prevent the json file from bloating? To achieve a good compromise between small size and functionality, use either the “slim”, “slim-stretch” or “slim-buster” version. It may be a challenge to keep the functional side intact while limiting the impact large resource have on Docker. However, beware, you may need to work on these a little more to see the full effect of Docker. Ok, so we've established the potential of using various image bases from different operating systems. Actually, as one of the smallest operating systems, it’s one of most popular choices for such cases. Almost all of them are based on Debian, except Alpine which is an operating system built specifically to be used inside of containers. What’s the difference between various base images then? Well, the main difference is that all of them are based on different releases. ![]() It is worth remembering that various base images hold different benefits. Instead of using a Python image based on Debian, we could use their more lightweight version or even Alpine-based version, and reduce our images size by multiple.ĭifference in size between the versions of images from DockerHub. Lighter images - first steps on how to achieve themĪnother great idea to save space and time in Docker is to use lighter versions of base images. Source: Redditįor more information about the topic of multi-stage builds, read this article. Node_modules are a good example of a big directory of unnecessary files post-usage. There will be no need to keep dependencies because you are not going to use them in the future. Because of all the requirements it can be really big, but you just need to generate styles and js once. For example, let's take the frontend files and the whole node_modules directory. What’s the deal with multi-stage builds in Docker?įirst of all, it pays off to know that each instruction in the Dockerfile adds a layer to the image but once the instruction is done, you don’t need the source files that it used, you just want their result. The mighty multi-stage builds come to the rescue. You probably don’t want to pay extra dollars for your storage but don’t worry - there is no point in doing that. Well if you are not running “docker system prune” every now and then, there is a solution that will allow you to build more images without buying a new hard drive or additional space on your storage server. If you are building a lot of images, you will most likely get a “no space left on device" error which can be especially painful if you have to do something fast. When you think of Docker probably two terms come to your mind - images and containers.
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