Add option to add labels to Kubernetes nodes

Make nextcloud always go to nodes with fast storage
Don't mount nextcloud on syncthing pod

flake-parts/kubenix.nix

@@ -1,9 +1,9 @@
-{ dns, myLib, flake-utils, kubenix, nixhelm, blog-pim, ... }: flake-utils.lib.eachDefaultSystem
+{ machines, dns, myLib, flake-utils, kubenix, nixhelm, blog-pim, ... }: flake-utils.lib.eachDefaultSystem
   (system:
   let
     mkKubenixPackage = module: kubenix.packages.${system}.default.override
       {
-        specialArgs = { inherit myLib kubenix nixhelm system dns blog-pim; };
+        specialArgs = { inherit myLib kubenix nixhelm system dns blog-pim machines; };
         module = { imports = [ module ]; };
       };
   in

kubenix-modules/all.nix

@@ -15,10 +15,10 @@ let
     ./media.nix
     ./bind9
     ./dnsmasq.nix
-    # ./minecraft.nix
     ./blog.nix
     ./atticd.nix
     # ./argo.nix
+    # ./minecraft.nix
   ];
 in
 {

kubenix-modules/base.nix

@@ -1,6 +1,6 @@
 # We deploy several resources that rely on "custom resource definitions".
 # We must first import these resources definitions, before deploying resources that depend on them.
-{ kubenix, nixhelm, system, ... }: {
+{ lib, kubenix, nixhelm, system, machines, ... }: {
   imports = [
     kubenix.modules.k8s
     kubenix.modules.helm
@@ -58,6 +58,16 @@
           };
         };
       };
+
+      resources.nodes =
+        let
+          machinesWithKubernetesLabels = lib.filterAttrs (name: machine: machine.kubernetesNodeLabels != null) machines;
+        in
+        builtins.mapAttrs
+          (name: machine: {
+            metadata.labels = machine.kubernetesNodeLabels;
+          })
+          machinesWithKubernetesLabels;
     };
   };
 }

kubenix-modules/nextcloud.nix

@@ -13,6 +13,14 @@
 
       spec = {
         selector.matchLabels.app = "nextcloud";
+        strategy = {
+          type = "RollingUpdate";
+
+          rollingUpdate = {
+            maxSurge = 0;
+            maxUnavailable = 1;
+          };
+        };
 
         template = {
           metadata.labels.app = "nextcloud";
@@ -40,6 +48,15 @@
               fsGroup = 33;
               fsGroupChangePolicy = "OnRootMismatch";
             };
+
+            affinity.nodeAffinity.preferredDuringSchedulingIgnoredDuringExecution = [{
+              weight = 1;
+              preference.matchExpressions = [{
+                key = "storageType";
+                operator = "In";
+                values = [ "fast" ];
+              }];
+            }];
           };
         };
       };

kubenix-modules/syncthing.nix

@@ -26,10 +26,6 @@
                   name = "config";
                   mountPath = "/config";
                 }
-                {
-                  name = "nextcloud-data";
-                  mountPath = "/data";
-                }
                 {
                   name = "music";
                   mountPath = "/music";
@@ -39,7 +35,6 @@
 
             volumes = {
               config.persistentVolumeClaim.claimName = "syncthing";
-              nextcloud-data.persistentVolumeClaim.claimName = "nextcloud";
               music.persistentVolumeClaim.claimName = "music";
             };
 

machines/atlas.nix

@@ -1,6 +1,7 @@
 {
   machines.atlas = {
     arch = "x86_64-linux";
+    kubernetesNodeLabels.storageType = "slow";
 
     nixosModule.lab = {
       storage = {

machines/default.nix

@@ -22,6 +22,14 @@ let
           Customized configuration for this machine in the form of a NixOS module.
         '';
       };
+
+      kubernetesNodeLabels = lib.mkOption {
+        default = null;
+        type = with lib.types; nullOr attrs;
+        description = ''
+          Any labels to add to the Kubernetes node.
+        '';
+      };
     };
   };
 in

machines/jefke.nix

@@ -1,6 +1,7 @@
 {
   machines.jefke = {
     arch = "x86_64-linux";
+    kubernetesNodeLabels.storageType = "fast";
 
     nixosModule.lab = {
       storage = {