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Generating a Docker image for the blackbird demo UI

This assumes you are running an aarch64-darwin system.

We mostly need to follow steps 1-3 from this page in order to get this repository's docker.nix going.

First, add this to your /etc/nix/nix.conf.

# Needed for the darwin linux builder (aarch64-linux)
build-users-group = nixbld
extra-trusted-users = <REPLACE_WITH_YOUR_MACOS_USERNAME>
builders = ssh-ng://builder@localhost aarch64-linux /etc/nix/builder_ed25519 10 - - - c3NoLWVkMjU1MTkgQUFBQUMzTnphQzFsWkRJMU5URTVBQUFBSUpCV2N4Yi9CbGFxdDFhdU90RStGOFFVV3JVb3RpQzVxQkorVXVFV2RWQ2Igcm9vdEBuaXhvcwo=
builders-use-substitutes = true

# Needed for NixOS tests
extra-system-features = hvf

Then, restart the nix daemon:

$ sudo launchctl kickstart -k system/org.nixos.nix-daemon

Finally, spin up the aarch64-linux builder that we added in /etc/nix/nix.conf:

QEMU_OPTS="-m 8192" nix run github:NixOS/nixpkgs/af89d3a2be6f70edb187dd817377d6c4360134fa#darwin.builder --extra-experimental-features nix-command --extra-experimental-features flakes

Wait for this to bring you into a VM, and then in another terminal, run:

$ nix-build docker.nix --no-out-link

This will produce a tar.gz file containing the docker image, which can be docker loaded:

$ docker load -i $(nix-build docker.nix --no-out-link)

This registers the image under blackbird-demo:latest. You can then start a container from that image, and get the blackbird demo running on port 8000 with:

$ docker run -p 8000:8000 -it blackbird-demo:latest

You should now be able to play around with blackbird policies in your browser at http://localhost:8000/.