From e57b1b5fd8fe11478fd784aa90eedb89fca64d86 Mon Sep 17 00:00:00 2001
From: Rodrigo Arias Mallo <rodrigo.arias@bsc.es>
Date: Thu, 31 Jul 2025 17:39:21 +0200
Subject: [PATCH] Keep compute nodes off when power comes back

When the power comes back, we don't know if the AC unit will be
operating properly or if the room will be at a safe temperature. So,
instead of powering all the machines back, only configure the login to
power on, so we can check the state of the room and power the rest of
the machines.
---
 m/apex/configuration.nix          | 3 +++
 m/common/base/always-power-on.nix | 8 --------
 m/common/base/power-policy.nix    | 9 +++++++++
 m/fox/configuration.nix           | 3 +++
 m/raccoon/configuration.nix       | 3 +++
 5 files changed, 18 insertions(+), 8 deletions(-)
 delete mode 100644 m/common/base/always-power-on.nix
 create mode 100644 m/common/base/power-policy.nix

diff --git a/m/apex/configuration.nix b/m/apex/configuration.nix
index 540e5077..f4afe85d 100644
--- a/m/apex/configuration.nix
+++ b/m/apex/configuration.nix
@@ -5,9 +5,12 @@
     ../common/xeon.nix
     ../common/ssf/hosts.nix
     ../module/ceph.nix
+    ../module/power-policy.nix
     ./nfs.nix
   ];
 
+  power.policy = "always-on";
+
   # Don't install grub MBR for now
   boot.loader.grub.device = "nodev";
 
diff --git a/m/common/base/always-power-on.nix b/m/common/base/always-power-on.nix
deleted file mode 100644
index cdee12c6..00000000
--- a/m/common/base/always-power-on.nix
+++ /dev/null
@@ -1,8 +0,0 @@
-{
-  imports = [
-    ../../module/power-policy.nix
-  ];
-
-  # Turn on as soon as we have power
-  power.policy = "always-on";
-}
diff --git a/m/common/base/power-policy.nix b/m/common/base/power-policy.nix
new file mode 100644
index 00000000..48585a89
--- /dev/null
+++ b/m/common/base/power-policy.nix
@@ -0,0 +1,9 @@
+{
+  imports = [
+    ../../module/power-policy.nix
+  ];
+
+  # By default, keep the machines off as we don't know if the AC will be working
+  # once the electricity comes back.
+  power.policy = "always-off";
+}
diff --git a/m/fox/configuration.nix b/m/fox/configuration.nix
index 436a85ec..e7e8e8f3 100644
--- a/m/fox/configuration.nix
+++ b/m/fox/configuration.nix
@@ -6,8 +6,11 @@
     ../common/xeon/console.nix
     ../module/emulation.nix
     ../module/nvidia.nix
+    ../module/power-policy.nix
   ];
 
+  power.policy = "always-on";
+
   # Don't turn off on August as UPC has different dates.
   # Fox works fine on power cuts.
   systemd.timers.august-shutdown.enable = false;
diff --git a/m/raccoon/configuration.nix b/m/raccoon/configuration.nix
index 46f63f56..18603c6f 100644
--- a/m/raccoon/configuration.nix
+++ b/m/raccoon/configuration.nix
@@ -7,9 +7,12 @@
     ../module/debuginfod.nix
     ../module/ssh-hut-extern.nix
     ../module/nvidia.nix
+    ../module/power-policy.nix
     ../eudy/kernel/perf.nix
   ];
 
+  power.policy = "always-on";
+
   # Don't install Grub on the disk yet
   boot.loader.grub.device = "nodev";