LESSON 1.2
Layers, caching, and multi-stage builds
Learn key techniques and workflows in DevOps with Docker and Kubernetes.
6m
advanced
8,194 students
Overview
Instruction order decides your build time. Copy dependency manifests before source, and use a multi-stage build to leave the toolchain behind.
In this lesson you will:
- Order instructions so the cache survives code changes
- Separate build and runtime with multi-stage builds
- Cut image size and shrink the attack surface
Pro Tip
Copy your lockfile and install dependencies before copying source. Otherwise every edit invalidates the install layer.