modules/cluster/deployment: init

modules/cluster/deployment.nix

@@ -0,0 +1,53 @@
+{ config, lib, ... }:
+
+let
+  inherit (config.networking) hostName;
+  inherit (config.system.build.skyflake-deployment) user repo vmName;
+  
+  generateMacAddress = net:
+    let
+      hash = builtins.hashString "md5" "1-${net}-${hostName}";
+      c = off: builtins.substring off 2 hash;
+    in
+      "${builtins.substring 0 1 hash}2:${c 2}:${c 4}:${c 6}:${c 8}:${c 10}";
+
+  withoutLeadingSlash = s:
+    let s' = lib.removePrefix "/" s; in
+    if s' == s
+    then s
+    else withoutLeadingSlash s';
+  
+in
+{
+  config.microvm = {
+    hypervisor = "cloud-hypervisor";
+    vcpu = config.deployment.vcpu;
+    mem = config.deployment.mem;
+
+    shares = [ {
+      proto = "virtiofs";
+      tag = "ro-store";
+      source = "/nix/store";
+      mountPoint = "/nix/.ro-store";
+    } ] ++ map (mountPoint: {
+      proto = "virtiofs";
+      tag = builtins.replaceStrings [ "/" ] [ "-" ] (
+        withoutLeadingSlash mountPoint
+      );
+      source = "/storage/glusterfs/microvms/${user}/${repo}/${vmName}/${withoutLeadingSlash mountPoint}";
+      inherit mountPoint;
+    }) config.deployment.persistedShares;
+    # volumes = [ {
+    #   image = "/storage/glusterfs/microvms/${user}/${repo}/${vmName}/overlay.img";
+    #   mountPoint = "/";
+    #   size = 8 * 1024;
+    # } ];
+    # writableStoreOverlay = "/nix/.rw-store";
+
+    interfaces = map (net: {
+      type = "tap";
+      id = builtins.substring 0 15 "${net}-${hostName}";
+      mac = generateMacAddress net;
+    }) config.deployment.networks;
+  };
+}