Docker Linting Demo

Linting Docker demo

Install

Here i am using OSX, installing hadolint using brew.

$ brew install hadolint

hadolint Dockerfile

$ hadolint Dockerfile 
Dockerfile:4 DL3020 Use COPY instead of ADD for files and folders

$ hadolint --ignore DL3003 --ignore DL3006 Dockerfile 
Dockerfile:4 DL3020 Use COPY instead of ADD for files and folders

$ hadolint --trusted-registry xyz.com:500 Dockerfile 
Dockerfile:1 DL3026 Use only an allowed registry in the FROM image
Dockerfile:4 DL3020 Use COPY instead of ADD for files and folders