docker-ca-trust

This is an example of a Docker image that bootstraps an internal CA. It can serve as a pattern for trusting internal CAs, for any Ubuntu-based Docker image. The CA URL and Fingerprint can be hardcoded or supplied as build arguments.

This image can be layered on top of any Ubuntu-based server image. For example, change FROM ubuntu:focal to FROM mongo and you will get a MongoDB server that trusts your CA. The CA certificate is stored in /usr/local/share/ca-certificates/root_ca.crt in the container.

To build it:

docker build . --build-arg CA_URL=https://ca.smallstep.com --build-arg CA_FINGERPRINT=abc123123