feat: add configs for kubevirt-lab-1

hosts/k8s/kubevirt-shoryu/impermanence.nix

@@ -0,0 +1,53 @@
+{
+  impermanence,
+  pkgs,
+  ...
+}: {
+  imports = [
+    impermanence.nixosModules.impermanence
+  ];
+
+  environment.systemPackages = [
+    # `sudo ncdu -x /`
+    pkgs.ncdu
+  ];
+
+  # NOTE: impermanence only mounts the directory/file list below to /persistent
+  # If the directory/file already exists in the root filesystem, you should
+  # move those files/directories to /persistent first!
+  environment.persistence."/persistent" = {
+    # sets the mount option x-gvfs-hide on all the bind mounts
+    # to hide them from the file manager
+    hideMounts = true;
+    directories = [
+      "/etc/NetworkManager/system-connections"
+      "/etc/ssh"
+      "/etc/nix/inputs"
+      "/etc/secureboot" # lanzaboote - secure boot
+      # my secrets
+      "/etc/agenix/"
+
+      "/var/log"
+      "/var/lib"
+
+      # k3s related
+      "/etc/iscsi"
+      "/etc/rancher"
+    ];
+    files = [
+      "/etc/machine-id"
+    ];
+
+    # the following directories will be passed to /persistent/home/$USER
+    users.ryan = {
+      directories = [
+        "codes"
+        "nix-config"
+        "tmp"
+      ];
+      files = [
+        ".config/nushell/history.txt"
+      ];
+    };
+  };
+}