Fix docker and podman module (also enable podman in colmena for dev)

modules/utils/server-node-users.nix

@@ -32,7 +32,7 @@ in
         isNormalUser = true;
         hashedPassword = "$y$j9T$oWLCV1hnGPyOGabMfAS3p1$/iwouRZGwQXcv6IHnLuT3I9.pmeXNpcHxq.b8xfitr1";
         shell = pkgs.bash;
-        extraGroups = [ "wheel" ];
+        extraGroups = [ "wheel" ] ++ lib.optionals config.virtualisation.docker.enable [ "docker" ];
         openssh.authorizedKeys.keys = sshKeys.infra-core;
       };
 

modules/virtualisation/docker.nix

@@ -14,13 +14,10 @@ in
 
   config = lib.mkIf cfg.enable {
     virtualisation = {
-      docker = {
-        storageDriver = "overlay2";
-      };
-
+      docker.enable = true;
       oci-containers.backend = "docker";
-
     };
+
   };
 
 }

modules/virtualisation/podman.nix

@@ -13,15 +13,28 @@ in
   };
 
   config = lib.mkIf cfg.enable {
+    # Enable common container config files in /etc/containers
+    virtualisation.containers.enable = true;
     virtualisation = {
-
       podman = {
         enable = true;
-      };
 
-      oci-containers.backend = "podman";
+        # Create a `docker` alias for podman, to use it as a drop-in replacement
+        dockerCompat = true;
+
+        # Required for containers under podman-compose to be able to talk to each other.
+        defaultNetwork.settings.dns_enabled = true;
+      };
     };
 
+    # Useful other development tools
+    environment.systemPackages = with pkgs; [
+      dive # look into docker image layers
+      podman-tui # status of containers in the terminal
+      docker-compose # start group of containers for dev
+      podman-compose # start group of containers for dev
+    ];
+
     # Depending on the host filesystem
     # virtualisation.containers.storage.settings = {
     #   storage = {