From 5d27509f500119760de042f8cb81365907559640 Mon Sep 17 00:00:00 2001
From: Akshay Mankar <itsakshaymankar@gmail.com>
Date: Mon, 5 Jun 2023 19:28:33 +0200
Subject: [PATCH] erpnext starts in the VM

---
 python-overlay.nix        |   2 +-
 test-vm/configuration.nix | 188 ++++++++++++++++++++++----------------
 2 files changed, 111 insertions(+), 79 deletions(-)

diff --git a/python-overlay.nix b/python-overlay.nix
index 88dac61..fa9905c 100644
--- a/python-overlay.nix
+++ b/python-overlay.nix
@@ -1,5 +1,5 @@
 self: super: {
-  python3 = super.python3.override {
+  python3-erpnext = super.python3.override {
     packageOverrides = pyself: pysuper: {
       bench = pyself.callPackage ./python/bench.nix {};
       erpnext = pyself.callPackage ./python/erpnext.nix {};
diff --git a/test-vm/configuration.nix b/test-vm/configuration.nix
index 2f4be5e..b63829f 100644
--- a/test-vm/configuration.nix
+++ b/test-vm/configuration.nix
@@ -1,5 +1,4 @@
 { pkgs, lib, config, modulesPath, ... }:
-with lib;
 {
   imports = [
     "${modulesPath}/profiles/minimal.nix"
@@ -9,6 +8,7 @@ with lib;
 
   config = {
     services.qemuGuest.enable = true;
+    system.stateVersion = "23.05";
 
     fileSystems."/" = {
       device = "/dev/disk/by-label/nixos";
@@ -28,6 +28,14 @@ with lib;
       # We don't want to use tmpfs, otherwise the nix store's size will be bounded
       # by a fraction of available RAM.
       writableStoreUseTmpfs = false;
+
+      forwardPorts = [{
+        guest.port = 22;
+        host.port = 2222;
+      } {
+        guest.port = 9090;
+        host.port = 9090;
+      }];
     };
 
     # So that we can ssh into the VM, see e.g.
@@ -36,7 +44,11 @@ with lib;
     services.openssh.settings.PermitRootLogin = "yes";
     # Give root an empty password to ssh in.
     users.extraUsers.root.password = "";
+    users.users.root.openssh.authorizedKeys.keys = [
+      "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIMNeQYLFauAbzDyIbKC86NUh9yZfiyBm/BtIdkcpZnSU"
+    ];
     users.mutableUsers = false;
+    networking.firewall.enable = false;
 
     environment.systemPackages = with pkgs; [
       git
@@ -47,6 +59,13 @@ with lib;
     services.mysql = {
       enable = true;
       package = pkgs.mariadb;
+      ensureUsers = [{
+        name = "root";
+        ensurePermissions = {
+          "*.*" = "ALL PRIVILEGES";
+        };
+      }];
+      ensureDatabases = [ "root" ];
     };
 
     services.redis.servers = {
@@ -63,69 +82,61 @@ with lib;
       description = "User to run erpnext";
       group = "erpnext";
       isSystemUser = true;
+      home = "/var/lib/erpnext";
+      createHome = true;
+    };
+
+    systemd.services.setup-mysql = {
+      enable = true;
+      before = [ "erpnext.service" ];
+      after = [ "mysql.service" ];
+      wantedBy = [ "erpnext.service" ];
+      partOf = [ "erpnext.service" ];
+      script = ''
+        ${pkgs.mariadb-client}/bin/mysql -e "SET PASSWORD FOR 'root'@'localhost' = PASSWORD('password')";
+      '';
+      serviceConfig = {
+        RemainAfterExit = true;
+        Type = "oneshot";
+      };
+    };
+
+    systemd.services.ensure-bench-dir = {
+      enable = true;
+      before = [ "erpnext.service" ];
+      wantedBy = [ "erpnext.service" ];
+      partOf = [ "erpnext.service" ];
+      script = ''
+        cd /var/lib/erpnext
+        mkdir bench
+        cd bench
+        mkdir -p apps sites config/pids logs
+      '';
+      serviceConfig = {
+        RemainAfterExit = true;
+        Type = "oneshot";
+        User = "erpnext";
+      };
     };
-    #users = {
-    #  users.${user} = {
-    #    uid = 327;
-    #    group = group;
-    #    home = server.workDir;
-    #  };
-    #  groups.${group}.gid = 327;
-    #};
 
     systemd.services.erpnext =
-    let
-      name = "worker1";
-      user = "erpnext";
-      group = "erpnext";
-      server = {
-        bind = "127.0.0.1:9090";
-        workDir = "/var/lib/erpnext";
-      };
-    in {
-      enable = true;
-      wantedBy = [ "multi-user.target" ];
-      after = [ "mysql.service" "redis.service" "redis-socketio.service" ];
-      description = "ERPNext";
-
-      environment =
       let
-        penv = pkgs.python3.buildEnv.override {
+        penv = pkgs.python3-erpnext.buildEnv.override {
           extraLibs = [
-            pkgs.python3.pkgs.frappe
-            pkgs.python3.pkgs.erpnext
-            pkgs.python3.pkgs.bench
+            pkgs.python3-erpnext.pkgs.frappe
+            pkgs.python3-erpnext.pkgs.erpnext
+            pkgs.python3-erpnext.pkgs.bench
           ];
         };
-      in {
-        PYTHONPATH = "${penv}/${pkgs.python3.sitePackages}/";
-      };
-
-      #confinement = {
-      #  enable = true;
-      #  packages = [ ];
-      #};
-      serviceConfig = {
-        #User = "erpnext";
-        #NoNewPrivileges = true;
-        Type = "simple";
-        BindReadOnlyPaths = [
-          "${pkgs.frappe-app}/share/apps/frappe:/frappe-bench/apps/frappe"
-          "${pkgs.erpnext-app}/share/apps/erpnext:/frappe-bench/apps/erpnext"
-          "${pkgs.frappe-erpnext-assets}/share/sites/assets:/frappe-bench/sites/assets"
-          # "${penv}:/frappe-bench/env"
-        ];
-        ExecStartPre = pkgs.writeScript "erpnext-server.${name}-init" ''
-          #!/bin/sh
-          mkdir -p ${server.workDir}/sites
-          chown ${user}:${group} ${server.workDir}
-
-          cat > ${server.workDir}/sites/apps.txt <<EOF
+        appsFile = pkgs.writeText "erpnext-apps.txt" ''
           frappe
           erpnext
-          EOF
+        '';
 
-          cat > ${server.workDir}/sites/common_site_config.json <<EOF
+        # In a module, this could be provided by a use as a file as it could
+        # contain secrets and we don't want this in the nix-store. But here it
+        # is OK.
+        commonSiteConfig = pkgs.writeText "erpnext-common_site_config.json" ''
           {
             "db_host": "localhost",
             "db_port": 3306,
@@ -134,32 +145,53 @@ with lib;
             "redis_cache": "redis://localhost:6379?db=0",
             "redis_queue": "redis://localhost:6379?db=1",
             "redis_socketio": "redis://localhost:6379?db=2",
-            "socketio_port": 12311
+            "socketio_port": 3000
           }
-          EOF
-          cd "${server.workDir}/sites"
-          # Upstream initializes the DB with this command
-          bench new-site localhost --mariadb-root-password password --admin-password admin
-          bench --site localhost install-app erpnext
-          node $tmp/apps/frappe/socketio.js &
         '';
-        ExecStart = ''
-          ${pkgs.python3Packages.gunicorn}/bin/gunicorn frappe.app:application --name ${name} \
-          --chdir="${server.workDir}/sites" \
-          --user ${user} \
-          --group ${group} \
-          --bind=${server.bind} \
-          --pid ${server.workDir}/gunicorn-${name}.pid \
-          --threads=4 \
-          --workers=2 \
-          --worker-class=gthread \
-          --worker-tmp-dir=/dev/shm \
-          --timeout=120 \
-          --preload 
-        '';
-      };
-    };
+      in
+        {
+          enable = true;
+          wantedBy = [ "multi-user.target" ];
+          after = [ "mysql.service" "redis.service" "redis-socketio.service" ];
+          description = "ERPNext";
+          confinement = {
+            enable = true;
+            packages = [ pkgs.mariadb-client pkgs.nodejs penv ];
+          };
+          script = ''
+            export PYTHON_PATH=${penv}/${pkgs.python3-erpnext.sitePackages}
+            export PATH="${pkgs.mariadb-client}/bin:${pkgs.nodejs}/bin:${penv}/bin:$PATH"
 
-    system.stateVersion = "23.11";
+            cat /etc/hosts
+            ${pkgs.nettools}/bin/netstat -nptel
+
+            # Upstream initializes the DB with this command
+            # TODO: Make this idempotent
+            cd /var/lib/erpnext/bench/sites
+            bench new-site localhost --mariadb-root-password password --admin-password admin
+            bench --site localhost install-app erpnext
+
+            # TODO: Run these as systemd units
+            node /var/lib/erpnext/bench/apps/frappe/socketio.js &
+            gunicorn --chdir="/var/lib/erpnext/bench/sites" --bind=0.0.0.0:9090 --threads=4 --workers=2 --worker-class=gthread --worker-tmp-dir=/dev/shm --timeout=120 --preload frappe.app:application
+          '';
+          serviceConfig = {
+            User = "erpnext";
+            NoNewPrivileges = true;
+            Type = "simple";
+            BindReadOnlyPaths = [
+              "/etc/hosts:/etc/hosts"
+              "${pkgs.frappe-app}/share/apps/frappe:/var/lib/erpnext/bench/apps/frappe"
+              "${pkgs.erpnext-app}/share/apps/erpnext:/var/lib/erpnext/bench/apps/erpnext"
+              "${pkgs.frappe-erpnext-assets}/share/sites/assets:/var/lib/erpnext/bench/sites/assets"
+              "${appsFile}:/var/lib/erpnext/bench/sites/apps.txt"
+              "${commonSiteConfig}:/var/lib/erpnext/bench/sites/common_site_config.json"
+              "${penv}:/var/lib/erpnext/bench/env"
+            ];
+            BindPaths = [
+              "/var/lib/erpnext:/var/lib/erpnext"
+            ];
+          };
+        };
   };
 }