docker-containers example for NixOS/NixOps

README.md

NixOps Deployment of a Docker Container

Install NixOps

If using NixOS:

$ nix-env -iA nixos.nixops

If using Nix on another OS:

$ nix-env -iA nixpkgs.nixops

Create the Deployment

$ nixops create ./trivial.nix ./trivial-vbox.nix -d http
$ nixops deploy -d http
$ nixops info -d http

Get the IP address from that last command and:

$ curl http://192.168.56.105

Destroy the Deployment

$ nixops destroy -d http
$ nixops delete -d http

trivial-vbox.nix

{
  webserver =
    { config, pkgs, ... }:
    { deployment.targetEnv = "virtualbox";
      deployment.virtualbox.memorySize = 1024; # megabytes
      deployment.virtualbox.vcpu = 2; # number of cpus
    };
}

trivial.nix

{
  network.description = "Web server";

  webserver = { config, pkgs, ... }: {
    docker-containers."nginx" = {
      image = "nginx:latest";
      environment = {
        "FOO" = "bar";
      };
      ports = [ "80:80" ];
    };

    networking.firewall.allowedTCPPorts = [ 80 ];
  };
}