server9, server10: refactor into modules/microvm-host

flake.nix

@@ -694,6 +694,7 @@
           modules = [
             ./hosts/server9
             microvm.nixosModules.host
+            self.nixosModules.microvm-host
             self.nixosModules.cluster-network
             self.nixosModules.cluster
             { _module.args = { inherit self; }; }
@@ -704,6 +705,7 @@
           modules = [
             ./hosts/server10
             microvm.nixosModules.host
+            self.nixosModules.microvm-host
             self.nixosModules.cluster-network
             self.nixosModules.cluster
             { _module.args = { inherit self; }; }
@@ -789,6 +791,7 @@
           microvm.nixosModules.microvm
           ./modules/microvm.nix
         ];
+        microvm-host = ./modules/microvm-host.nix;
         nncp = ./modules/nncp.nix;
         plume = {
           imports = [ ./modules/plume.nix ];

hosts/server10/default.nix

@@ -4,7 +4,6 @@
   imports = [
     ./hardware-configuration.nix
     ./microvm-staging.nix
-    ./microvms.nix
   ];
 
   c3d2 = {
@@ -45,5 +44,11 @@
     zfs.autoScrub.enable = true;
   };
 
+  # static list of microvms from other sources
+  microvm.autostart = [
+    "data-hoarder"
+    "staging-data-hoarder"
+  ];
+
   system.stateVersion = "21.11"; # Did you read the comment?
 }

hosts/server9/default.nix

@@ -31,7 +31,10 @@
   services.zfs.autoScrub.enable = true;
   services.smartd.enable = true;
 
-  c3d2.hq.statistics.enable = true;
+  c3d2 = {
+    deployment.microvmBaseZfsDataset = "tank/storage";
+    hq.statistics.enable = true;
+  };
 
   # XXX: enable for zw-ev and poelzi-ha until we find a better solution
   virtualisation.libvirtd = {

modules/microvm-host.nix

@@ -8,21 +8,14 @@
   };
 
   config = {
+    # just all the microvms from this flake
+    # that are supposed to run on the server
     microvm.autostart =
-      # static list of microvms from other sources
-      [ 
-        "data-hoarder"
-        "staging-data-hoarder"
-      ]
-      ++
-      # just all the microvms from this flake
-      # that are supposed to run on the server
       builtins.filter (name:
-        self.nixosConfigurations.${name}
-          .config ? c3d2.deployment.server
-        && self.nixosConfigurations.${name}
-          .config.c3d2.deployment.server
-        == config.networking.hostName
+        let
+          inherit (self.nixosConfigurations.${name}) config;
+        in
+          (config.c3d2.deployment.server or null) == config.networking.hostName
       ) (builtins.attrNames self.nixosConfigurations);
 
     systemd.services."microvm-virtiofsd@" = {