From 49d00885957cca13f0254e2aa73d38bc54fff196 Mon Sep 17 00:00:00 2001
From: Menno van Leeuwen <menno@vleeuwen.me>
Date: Wed, 19 Mar 2025 00:53:22 +0100
Subject: [PATCH] add JuiceFS custom mount service configuration

---
 config/nixos/packages/server/default.nix |   9 ++
 config/nixos/packages/server/juicefs.nix | 104 +++++++++++++++++++++++
 2 files changed, 113 insertions(+)
 create mode 100644 config/nixos/packages/server/juicefs.nix

diff --git a/config/nixos/packages/server/default.nix b/config/nixos/packages/server/default.nix
index a1f59f2..651c5db 100644
--- a/config/nixos/packages/server/default.nix
+++ b/config/nixos/packages/server/default.nix
@@ -2,5 +2,14 @@
 {
   # Import all the package modules
   imports = [
+    ./juicefs.nix
   ];
+  
+  # Enable JuiceFS
+  services.juicefsCustom = {
+    enable = true;
+    redisUrl = "redis://:your-redis-password@localhost:6379/0";
+    mountPoint = "/mnt/object_storage";
+    cacheDir = "/var/jfsCache";
+  };
 }
diff --git a/config/nixos/packages/server/juicefs.nix b/config/nixos/packages/server/juicefs.nix
new file mode 100644
index 0000000..a5f3888
--- /dev/null
+++ b/config/nixos/packages/server/juicefs.nix
@@ -0,0 +1,104 @@
+{ config, pkgs, lib, ... }:
+
+with lib;
+
+let
+  cfg = config.services.juicefsCustom;
+in {
+  options.services.juicefsCustom = {
+    enable = mkEnableOption "JuiceFS custom mount service";
+    
+    mountPoint = mkOption {
+      type = types.str;
+      default = "/mnt/object_storage";
+      description = "Directory where JuiceFS should mount the filesystem";
+    };
+    
+    cacheDir = mkOption {
+      type = types.str;
+      default = "/var/jfsCache";
+      description = "Directory for JuiceFS cache";
+    };
+    
+    cacheSize = mkOption {
+      type = types.int;
+      default = 204800;
+      description = "Cache size in MiB";
+    };
+    
+    redisUrl = mkOption {
+      type = types.str;
+      default = "redis://:PASSWORD@localhost:6379/0";
+      description = "Redis URL for metadata storage (replace PASSWORD with actual password)";
+    };
+    
+    bufferSize = mkOption {
+      type = types.int;
+      default = 1024;
+      description = "Buffer size in MiB";
+    };
+    
+    prefetch = mkOption {
+      type = types.int;
+      default = 4;
+      description = "Prefetch size";
+    };
+    
+    attrCache = mkOption {
+      type = types.int;
+      default = 3;
+      description = "Attribute cache expiration time in seconds";
+    };
+    
+    entryCache = mkOption {
+      type = types.int;
+      default = 3;
+      description = "Entry cache expiration time in seconds";
+    };
+    
+    openCache = mkOption {
+      type = types.int;
+      default = 3;
+      description = "Open file cache expiration time in seconds";
+    };
+  };
+
+  config = mkIf cfg.enable {
+    # Install JuiceFS package
+    environment.systemPackages = [ pkgs.juicefs ];
+    
+    # Create the mount and cache directories
+    systemd.tmpfiles.rules = [
+      "d ${cfg.mountPoint} 0755 root root -"
+      "d ${cfg.cacheDir} 0755 root root -"
+    ];
+    
+    # Add the JuiceFS systemd service
+    systemd.services.juicefs = {
+      description = "JuiceFS Mount Service";
+      wantedBy = [ "multi-user.target" ];
+      before = [ "docker.service" ];
+      after = [ "network.target" ];
+      
+      serviceConfig = {
+        Type = "simple";
+        ExecStart = "${pkgs.juicefs}/bin/juicefs mount ${cfg.redisUrl} ${cfg.mountPoint} "
+                  + "--cache-dir=${cfg.cacheDir} "
+                  + "--buffer-size=${toString cfg.bufferSize} "
+                  + "--prefetch=${toString cfg.prefetch} "
+                  + "--cache-size=${toString cfg.cacheSize} "
+                  + "--attr-cache=${toString cfg.attrCache} "
+                  + "--entry-cache=${toString cfg.entryCache} "
+                  + "--open-cache=${toString cfg.openCache}";
+        Restart = "on-failure";
+      };
+    };
+    
+    # Setup Redis service if it doesn't exist elsewhere in your config
+    services.redis = {
+      enable = true;
+      bind = "127.0.0.1";
+      port = 6379;
+    };
+  };
+}