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Optimise Your Docker Images with Multi-Stage Docker Builds
Imagine our server has 120 GB of available storage, and each of your Docker images is 1.2 GB.
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How many docker images can you store on that server?
100 images can be stored aproximately, assuming the entire 120 GB is available exclusively for Docker images.
Let’s say you can reduce each image size to 120 MB. Imagine how many docker images can be stored, and we are also optimising storage, improving deployment speed and keeping containers cleaner.
Let’s see how we can reduce docker image size without compromising the application. In this blog, we will explore how to optimise docker images and build smaller, more efficient containers using multi-stage Docker builds, with an example of a Node JS application.
Quick docker refresh
A Docker image is a template for creating a docker container. Docker container has everything that the application needs to run. Docker image is built using a Dockerfile.
- Every Dockerfile starts with importing a base image.
- Then we set up a working directory.
- Copying code from the local system.
