feat(extractors): Add support for oci-containers

README.md

@@ -193,7 +193,6 @@ Yep, there's still a lot that could be added or improved.
 
 #### Information Gathering (Extractors)
 
-- Podman / docker harvesting
 - networking.interfaces extractor
 - Disks (from disko) + render
 - Impermanence render?

examples/complex/flake.nix

@@ -45,6 +45,13 @@
               };
             };
 
+            virtualisation.oci-containers.backend = "docker";
+            virtualisation.oci-containers.containers = {
+              test = {
+                image = "test/test:latest";
+              };
+            };
+
             # We can change our own node's topology settings from here:
             topology.self.name = "🧱  Small Firewall";
             topology.self.interfaces.wg0 = {
@@ -110,6 +117,18 @@
                 };
               };
 
+              virtualisation.oci-containers.backend = "podman";
+              virtualisation.oci-containers.containers = {
+                test = {
+                  image = "test/test@digest";
+
+                  ports = [ "4242:80" ];
+
+                  volumes = [ "/test:/mnt" ];
+
+                };
+              };
+
               containers.test.config = {
                 imports = [ nix-topology.nixosModules.default ];
                 networking.hostName = "host2-test";

nixos/extractors/oci-container.nix

@@ -0,0 +1,48 @@
+{ config, lib, ... }:
+let
+  inherit (lib)
+    concatStringsSep
+    filter
+    flip
+    head
+    isString
+    mapAttrsToList
+    mkEnableOption
+    mkIf
+    mkMerge
+    split
+    ;
+
+  inherit (config.virtualisation.oci-containers) backend containers;
+in
+{
+  options.topology.extractors.oci-containers.enable =
+    mkEnableOption "topology OCI container extractor"
+    // {
+      default = true;
+    };
+
+  config = mkIf (config.topology.extractors.oci-containers.enable && containers != { }) {
+    topology.nodes = mkMerge (
+      flip mapAttrsToList containers (
+        containerName: container: {
+          "${config.topology.id}-${backend}-${containerName}" = {
+            guestType = backend;
+            deviceType = "oci-container";
+            deviceIcon = "devices.${backend}";
+            services._guestInfo = {
+              name = "Guest Information";
+              hidden = true;
+              details = {
+                image.text = head (filter (v: isString v && v != "") (split "@|:" container.image));
+                ports = mkIf (container.ports != [ ]) { text = concatStringsSep "\n" container.ports; };
+                volumes = mkIf (container.volumes != [ ]) { text = concatStringsSep "\n" container.volumes; };
+              };
+            };
+            parent = config.topology.id;
+          };
+        }
+      )
+    );
+  };
+}

topology/renderers/svg/default.nix

@@ -217,6 +217,7 @@ let
               <p tw="text-sm m-0">${guest.guestType}</p>
             </div>
           </div>
+          ${optionalString (guest.services ? _guestInfo) (serviceDetails guest.services._guestInfo)}
         </div>
       '';