From 9694489910861909e78cf46ffb5c2541f19d6f92 Mon Sep 17 00:00:00 2001
From: Daniel Langbein <daniel@systemli.org>
Date: Thu, 14 Sep 2023 15:54:48 +0200
Subject: [PATCH] add docker

---
 hosts/yodaTab/configuration.nix  |  1 +
 hosts/yodaTux/configuration.nix  |  3 ++-
 hosts/yodaYoga/configuration.nix |  3 ++-
 modules/docker.nix               | 29 +++++++++++++++++++++++++++++
 modules/podman.nix               |  2 +-
 5 files changed, 35 insertions(+), 3 deletions(-)
 create mode 100644 modules/docker.nix

diff --git a/hosts/yodaTab/configuration.nix b/hosts/yodaTab/configuration.nix
index 708c687..e6a80f8 100644
--- a/hosts/yodaTab/configuration.nix
+++ b/hosts/yodaTab/configuration.nix
@@ -43,6 +43,7 @@ in
       #../../modules/digikam.nix
       #../../modules/android.nix
       #../../modules/podman.nix
+      #../../modules/docker.nix
     ];
 
   networking.hostName = "yodaTab";
diff --git a/hosts/yodaTux/configuration.nix b/hosts/yodaTux/configuration.nix
index d856ebc..728b74f 100644
--- a/hosts/yodaTux/configuration.nix
+++ b/hosts/yodaTux/configuration.nix
@@ -42,7 +42,8 @@ in
       ../../modules/thunderbird.nix
       ../../modules/digikam.nix
       ../../modules/android.nix
-      ../../modules/podman.nix
+      #../../modules/podman.nix
+      ../../modules/docker.nix
     ];
 
   networking.hostName = "yodaTux";
diff --git a/hosts/yodaYoga/configuration.nix b/hosts/yodaYoga/configuration.nix
index 7b4d45a..20e52dd 100644
--- a/hosts/yodaYoga/configuration.nix
+++ b/hosts/yodaYoga/configuration.nix
@@ -44,7 +44,8 @@ in
       #../../modules/thunderbird.nix
       #../../modules/digikam.nix
       #../../modules/android.nix
-      ../../modules/podman.nix
+      #../../modules/podman.nix
+      ../../modules/docker.nix
     ];
 
   networking.hostName = "yodaYoga";
diff --git a/modules/docker.nix b/modules/docker.nix
new file mode 100644
index 0000000..510d4ec
--- /dev/null
+++ b/modules/docker.nix
@@ -0,0 +1,29 @@
+{ config, pkgs, ... }:
+
+{
+  # https://nixos.wiki/wiki/Docker#Installation
+
+  # TODO: rootless Docker. https://nixos.wiki/wiki/Docker#Rootless_docker
+  # TODO: run as systemd services. https://nixos.wiki/wiki/Docker#docker_containers_as_systemd_services
+
+  virtualisation = {
+    docker = {
+      enable = true;
+
+      # As we use btrfs, we enable the according storageDriver option.
+      storageDriver = "btrfs";
+
+      # Run `docker system prune -f` every week.
+      autoPrune.enable = true;
+      autoPrune.dates = "weekly";
+      # https://docs.docker.com/engine/reference/commandline/system_prune/#options
+      autoPrune.flags = [
+        "--all"
+        "--volumes"
+        # https://docs.docker.com/engine/reference/commandline/system_prune/#filter
+        # https://pkg.go.dev/maze.io/x/duration#ParseDuration
+        "--filter until=7d"
+      ];
+    };
+  };
+}
diff --git a/modules/podman.nix b/modules/podman.nix
index 2b2885d..a265d91 100644
--- a/modules/podman.nix
+++ b/modules/podman.nix
@@ -5,7 +5,7 @@
   # 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
+  # TODO: Podman Terminal UI. https://github.com/containers/podman-tui#podman-tui
 
   environment.systemPackages = with pkgs; [
     podman-compose