Merge pull request #7987 from magnetophon/das_watchdog-master

add das_watchdog: a realtime watchdog

2 files changed, 35 insertions, 0 deletions

diff --git a/nixos/modules/module-list.nix b/nixos/modules/module-list.nix
index 2870a259adb..25633bae169 100644
--- a/nixos/modules/module-list.nix
+++ b/nixos/modules/module-list.nix
@@ -222,6 +222,7 @@
   ./services/monitoring/bosun.nix
   ./services/monitoring/cadvisor.nix
   ./services/monitoring/collectd.nix
+  ./services/monitoring/das_watchdog.nix
   ./services/monitoring/dd-agent.nix
   ./services/monitoring/graphite.nix
   ./services/monitoring/monit.nix
diff --git a/nixos/modules/services/monitoring/das_watchdog.nix b/nixos/modules/services/monitoring/das_watchdog.nix
new file mode 100644
index 00000000000..785b4289dff
--- /dev/null
+++ b/nixos/modules/services/monitoring/das_watchdog.nix
@@ -0,0 +1,34 @@
+# A general watchdog for the linux operating system that should run in the
+# background at all times to ensure a realtime process won't hang the machine
+{ config, lib, pkgs, ... }:
+
+with lib;
+
+let
+
+  inherit (pkgs) das_watchdog;
+
+in {
+  ###### interface
+
+  options = {
+    services.das_watchdog.enable = mkEnableOption "Whether to enable realtime watchdog";
+  };
+
+  ###### implementation
+
+  config = mkIf config.services.das_watchdog.enable {
+    environment.systemPackages = [ das_watchdog ];
+    systemd.services.das_watchdog = {
+      description = "Watchdog to ensure a realtime process won't hang the machine";
+      after = [ "multi-user.target" "sound.target" ];
+      wantedBy = [ "multi-user.target" ];
+      serviceConfig = {
+        User = "root";
+        Type = "oneshot";
+        ExecStart = "${das_watchdog}/bin/das_watchdog";
+        RemainAfterExit = true;
+      };
+    };
+  };
+}