examples/microvms-host: reformat

astro · Mar 21, 2024 · 30e8266 · 30e8266
1 parent e76628c
commit 30e8266
Showing 1 changed file with 80 additions and 84 deletions.
diff --git a/examples/microvms-host.nix b/examples/microvms-host.nix
@@ -11,47 +11,46 @@ nixpkgs.lib.nixosSystem {
     self.nixosModules.microvm
 
     ({ config, lib, pkgs, ... }:
-    let
-      hypervisors-with-mac = builtins.listToAttrs(
-        map (hypervisor:
-          let
-            hash = builtins.hashString "sha256" hypervisor;
-            c = off: builtins.substring off 2 hash;
-            mac = "${builtins.substring 0 1 hash}2:${c 2}:${c 4}:${c 6}:${c 8}:${c 10}";
-          in
-          { name = hypervisor; value = mac; })
-        self.lib.hypervisors);
-    in
-    {
-      networking.hostName = "microvms-host";
-      system.stateVersion = config.system.nixos.version;
-      users.users.root.password = "";
-      users.motd = ''
-        Once nested MicroVMs have booted you can look up DHCP leases:
-        networkctl status virbr0
+      let
+        hypervisorMacAddrs = builtins.listToAttrs (
+          map (hypervisor:
+            let
+              hash = builtins.hashString "sha256" hypervisor;
+              c = off: builtins.substring off 2 hash;
+              mac = "${builtins.substring 0 1 hash}2:${c 2}:${c 4}:${c 6}:${c 8}:${c 10}";
+            in {
+              name = hypervisor;
+              value = mac;
+            }) self.lib.hypervisors);
+      in {
+        networking.hostName = "microvms-host";
+        system.stateVersion = config.system.nixos.version;
+        users.users.root.password = "";
+        users.motd = ''
+          Once nested MicroVMs have booted you can look up DHCP leases:
+          networkctl status virbr0
 
-        They are configured to allow SSH login with an empty root
-        password.
-      '';
-      services.getty.autologinUser = "root";
+          They are configured to allow SSH login with an empty root
+          password.
+        '';
+        services.getty.autologinUser = "root";
 
-      # MicroVM settings
-      microvm = {
-        mem = 8192;
-        vcpu = 4;
-        # Use QEMU because nested virtualization and user networking
-        # are required.
-        hypervisor = "qemu";
-        interfaces = [ {
-          type = "user";
-          id = "qemu";
-          mac = "02:00:00:01:01:01";
-        } ];
-      };
+        # MicroVM settings
+        microvm = {
+          mem = 8192;
+          vcpu = 4;
+          # Use QEMU because nested virtualization and user networking
+          # are required.
+          hypervisor = "qemu";
+          interfaces = [ {
+            type = "user";
+            id = "qemu";
+            mac = "02:00:00:01:01:01";
+          } ];
+        };
 
-      # Nested MicroVMs (a *host* option)
-      microvm.vms = builtins.mapAttrs (hypervisor: mac:
-        {
+        # Nested MicroVMs (a *host* option)
+        microvm.vms = builtins.mapAttrs (hypervisor: mac: {
           config = {
             system.stateVersion = config.system.nixos.version;
             networking.hostName = "${hypervisor}-microvm";
@@ -61,7 +60,7 @@ nixpkgs.lib.nixosSystem {
               interfaces = [ {
                 type = "tap";
                 id = "vm-${builtins.substring 0 12 hypervisor}";
-	        inherit mac;
+                inherit mac;
               } ];
             };
             # Just use 99-ethernet-default-dhcp.network
@@ -73,54 +72,51 @@ nixpkgs.lib.nixosSystem {
               settings.PermitRootLogin = "yes";
             };
           };
-        }) hypervisors-with-mac;
+        }) hypervisorMacAddrs;
 
-      systemd.network = {
-        enable = true;
-        netdevs.virbr0.netdevConfig = {
-          Kind = "bridge";
-          Name = "virbr0";
-        };
-        networks.virbr0 = {
-          matchConfig.Name = "virbr0";
-          # Hand out IP addresses to MicroVMs.
-          # Use `networkctl status virbr0` to see leases.
-          networkConfig = {
-            DHCPServer = true;
-            IPv6SendRA = true;
+        systemd.network = {
+          enable = true;
+          netdevs.virbr0.netdevConfig = {
+            Kind = "bridge";
+            Name = "virbr0";
+          };
+          networks.virbr0 = {
+            matchConfig.Name = "virbr0";
+            # Hand out IP addresses to MicroVMs.
+            # Use `networkctl status virbr0` to see leases.
+            networkConfig = {
+              DHCPServer = true;
+              IPv6SendRA = true;
+            };
+            dhcpServerStaticLeases = [ {
+              # Let DHCP assign a statically known address to the qemu vm
+              dhcpServerStaticLeaseConfig = {
+                MACAddress = hypervisors-with-mac.qemu;
+                Address = "10.0.13.37";
+              };
+            } ];
+            addresses = [ {
+              addressConfig.Address = "10.0.0.1/24";
+            } {
+              addressConfig.Address = "fd12:3456:789a::1/64";
+            } ];
+            ipv6Prefixes = [ {
+              ipv6PrefixConfig.Prefix = "fd12:3456:789a::/64";
+            } ];
+          };
+          networks.microvm-eth0 = {
+            matchConfig.Name = "vm-*";
+            networkConfig.Bridge = "virbr0";
           };
-          dhcpServerStaticLeases =
-            [
-	      # Let DHCP assign a statically known address to the qemu vm
-              {
-                dhcpServerStaticLeaseConfig = {
-                  MACAddress = hypervisors-with-mac.qemu;
-                  Address = "10.0.13.37";
-                };
-              }
-            ];
-          addresses = [ {
-            addressConfig.Address = "10.0.0.1/24";
-          } {
-            addressConfig.Address = "fd12:3456:789a::1/64";
-          } ];
-          ipv6Prefixes = [ {
-            ipv6PrefixConfig.Prefix = "fd12:3456:789a::/64";
-          } ];
         };
-        networks.microvm-eth0 = {
-          matchConfig.Name = "vm-*";
-          networkConfig.Bridge = "virbr0";
+        # Allow DHCP server
+        networking.firewall.allowedUDPPorts = [ 67 ];
+        # Allow Internet access
+        networking.nat = {
+          enable = true;
+          enableIPv6 = true;
+          internalInterfaces = [ "virbr0" ];
         };
-      };
-      # Allow DHCP server
-      networking.firewall.allowedUDPPorts = [ 67 ];
-      # Allow Internet access
-      networking.nat = {
-        enable = true;
-        enableIPv6 = true;
-        internalInterfaces = [ "virbr0" ];
-      };
-    })
+      })
   ];
 }