![]() This means, among other things, as you build a Docker image (as part of your Dockerfile) it’s cached for performance. ![]() You need to think about what resources the host has, and how it’s sharing these with the containers.Ĭontainers are built from layers. Containers use the union file system. ![]() Some key points to remember about containers:Ĭontainers (nearly always) have hosts. Containers need machines to run on, but don’t expect them to run optimally out of the box. Containers will always run predictably-no matter where you choose to execute them-as isolated and protected processes. Simply put, Docker containers are a way of packaging and distributing software with simple instructions to run. It’s important to understand the nuances of how Docker works so we can ensure we’re leveraging its powerful features.
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