First working prototype.

.gitignore

@@ -152,3 +152,4 @@ cython_debug/
 #  option (not recommended) you can uncomment the following to ignore the entire idea folder.
 #.idea/
 
+*.ini

README.md

@@ -1,4 +1,26 @@
 # nfs-dirmaker
 
-Creates a directory into a NFS server exported file system.
-We use it to create the users' home directory before trying the mount via autofs
+Creates a directory into a NFS server exported file system.
+We use it to create the users' home directory before trying the mount via autofs.
+
+## Requirements
+
+* Python 3.8+
+* Flask 2.1
+
+### Build the environment
+
+``` shell
+python3 -m venv venv
+. venv/bin/activate
+pip install Flask
+```
+
+### Run the service
+
+``` shell
+source ./venv/bin/activate
+export FLASK_APP=dircreate
+export FLASK_ENV=development
+flask run
+```

createdir.service

@@ -0,0 +1,14 @@
+[Unit]
+Description=Small service that creates a directory
+After=syslog.target network.target
+
+[Service]
+Environment=FLASK_CONFIG=production
+Environment=FLASK_APP=dircreate
+User=dircreate
+WorkingDirectory=/opt/dircreate
+ExecStart=/opt/createdir/venv/bin/gunicorn -b localhost:5000 dircreate:app
+Restart=always
+
+[Install]
+WantedBy=multi-user.target

dircreate/__init__.py

@@ -0,0 +1,69 @@
+#!/usr/bin/env python3
+
+import configparser
+import os
+from os.path import exists
+from flask import Flask
+from flask import request
+
+debug = False
+
+if debug:
+    config_path_dir = '/tmp'
+else:
+    config_path_dir = './instance'
+config_filename = f"{config_path_dir}/config.ini"
+
+if exists(config_filename):
+    config = configparser.ConfigParser()
+    config.read(config_filename)
+    if debug:
+        print("Sections found in the config file: ", config.sections())
+    if 'create-homedir' in config.sections():
+        for key in config['create-homedir']:
+            if debug:
+                print('Key: ', key)
+            if config['create-homedir']['SECRET_KEY']:
+                SECRET_KEY = config['create-homedir']['SECRET_KEY']
+            else:
+                raise SystemExit('Error: config file, no SECRET_KEY found.')
+            if config['create-homedir']['DIR_PREFIX']:
+                DIR_PREFIX = config['create-homedir']['DIR_PREFIX']
+            else:
+                raise SystemExit('Error: config file, no DIR_PREFIX found.')
+    else:
+        raise SystemExit('Error: no create-homedir section found.')
+else:
+    raise SystemExit('Error: no config file found.')
+
+def make_homedir(dir_path):
+    if not os.path.isdir(dir_path):
+        permissions = 0o700
+        try:
+            os.mkdir(dir_path, permissions)
+        except OSError:
+            return("Creation of the directory %s failed" % dir_path), 500
+        else:
+            return("Directory %s created successfully" % dir_path), 200
+    else:
+        return("Directory %s already exists" % dir_path), 200
+
+def create_app(test_config=None):
+    # create and configure the app
+    create_home = Flask(__name__, instance_relative_config=True)
+    # ensure the instance folder exists
+    try:
+        os.path.isdir(DIR_PREFIX)
+    except OSError:
+        pass
+
+    # a simple page that says hello
+    @create_home.route('/', methods=['GET', 'POST'])
+    def makedir():
+        if request.method == 'POST':
+            username = request.form['user']
+            return make_homedir(f"{DIR_PREFIX}/{username}")
+        else:
+            return "Nosey, aren't you?"
+
+    return create_home

requirements.txt

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+click==8.1.2
+Flask==2.1.1
+gunicorn==20.1.0
+importlib-metadata==4.11.3
+itsdangerous==2.1.2
+Jinja2==3.1.1
+MarkupSafe==2.1.1
+Werkzeug==2.1.1
+zipp==3.8.0