Lightweight Docker Images in 5 Steps

Deploying services using lightweight Docker images offers numerous advantages, such as isolation, ease of deployment, and rapid boot times, but large image sizes can negate these benefits. Initially, Rendered Text faced challenges with oversized Docker images for their services, which led to lengthy deployment times. Through iterative improvements, they succeeded in reducing image sizes from several gigabytes to around 20 megabytes, achieving boot times under three seconds. Key strategies included minimizing Docker layers, using smaller base images, and effectively utilizing Docker caches. As they transitioned technologies from Ruby to Elixir, they leveraged the compact nature of compiled languages to further shrink image sizes, with some images being as small as 5 megabytes. Building custom base images for frequent service deployments also contributed to their efficiency. Despite initial hurdles, embracing Docker practices ultimately enhanced their deployment speed and reliability.