From 0c49512ebc00fa53a07fa79dd38d853a8d9c074f Mon Sep 17 00:00:00 2001
From: Daniel Langbein <daniel@systemli.org>
Date: Thu, 14 Sep 2023 12:13:59 +0200
Subject: [PATCH] add podman

---
 hosts/yodaTab/configuration.nix  |  1 +
 hosts/yodaTux/configuration.nix  |  1 +
 hosts/yodaYoga/configuration.nix |  1 +
 modules/podman.nix               | 39 ++++++++++++++++++++++++++++++++
 4 files changed, 42 insertions(+)
 create mode 100644 modules/podman.nix

diff --git a/hosts/yodaTab/configuration.nix b/hosts/yodaTab/configuration.nix
index 5a00151..f3c9380 100644
--- a/hosts/yodaTab/configuration.nix
+++ b/hosts/yodaTab/configuration.nix
@@ -42,6 +42,7 @@ in
       ../../modules/thunderbird.nix
       #../../modules/digikam.nix
       #../../modules/android.nix
+      #../../modules/podman.nix
     ];
 
   networking.hostName = "yodaTab";
diff --git a/hosts/yodaTux/configuration.nix b/hosts/yodaTux/configuration.nix
index 8e948a9..9b0cfdd 100644
--- a/hosts/yodaTux/configuration.nix
+++ b/hosts/yodaTux/configuration.nix
@@ -42,6 +42,7 @@ in
       ../../modules/thunderbird.nix
       ../../modules/digikam.nix
       ../../modules/android.nix
+      ../../modules/podman.nix
     ];
 
   networking.hostName = "yodaTux";
diff --git a/hosts/yodaYoga/configuration.nix b/hosts/yodaYoga/configuration.nix
index 8be1602..8e5278b 100644
--- a/hosts/yodaYoga/configuration.nix
+++ b/hosts/yodaYoga/configuration.nix
@@ -44,6 +44,7 @@ in
       #../../modules/thunderbird.nix
       #../../modules/digikam.nix
       #../../modules/android.nix
+      ../../modules/podman.nix
     ];
 
   networking.hostName = "yodaYoga";
diff --git a/modules/podman.nix b/modules/podman.nix
new file mode 100644
index 0000000..3bd6131
--- /dev/null
+++ b/modules/podman.nix
@@ -0,0 +1,39 @@
+{ config, pkgs, ... }:
+
+{
+  # https://nixos.wiki/wiki/Podman#Install_and_configure_podman_with_NixOS_service_configuration
+  # https://search.nixos.org/options?channel=23.05&query=virtualisation.podman
+
+  # TODO: Run as systemd services. https://nixos.wiki/wiki/Podman#Run_Podman_containers_as_systemd_services
+  # TODO: Podman Terminal UI: https://github.com/containers/podman-tui#podman-tui
+
+  environment.systemPackages = with pkgs; [
+    podman-compose
+  ];
+
+  virtualisation = {
+    podman = {
+      enable = true;
+
+      # 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;
+      };
+
+      # Run `podman system prune` every week.
+      autoPrune.enable = true;
+      autoPrune.dates = "weekly";
+      autoPrune.flags = [
+        # Recursively remove all unused pods, containers, images, networks, and volume data.
+        # https://docs.podman.io/en/stable/markdown/podman-system-prune.1.html#all-a
+        "--all"
+        # Prune volumes currently unused by any container
+        # https://docs.podman.io/en/stable/markdown/podman-system-prune.1.html#volumes
+        "--volumes"
+      ];
+    };
+  };
+}