Comment créer un service Python 3 qui utilise socket avec systemd ?

J'essaie de créer un service avec systemd, où j'utilise python3 pour créer un simple socket et le laisser comme un démon, mais j'ai fait plusieurs tentatives mais dans les deux cas sans aucun succès. Pour aujourd'hui, systemd m'a battu, mais demain est un autre jour pour essayer.

Serveur

import socket 
host = '127.0.0.1'
port = 9999
BUFFER_SIZE = 1024 

with socket.socket(socket.AF_INET, socket.SOCK_STREAM) as socket_tcp:
    socket_tcp.bind((host, port)) 
    socket_tcp.listen(5) # Esperamos la conexión del cliente 
    conn, addr = socket_tcp.accept() # Establecemos la conexión con el cliente 
    with conn:
        print('[*] Conexión establecida') 
        while True:
            # Recibimos bytes, convertimos en str
            data = conn.recv(BUFFER_SIZE)
            # Verificamos que hemos recibido datos
            if not data:
                break
            else:
                print('[*] Datos recibidos: {}'.format(data.decode('utf-8'))) 
            conn.send(data) # Hacemos echo convirtiendo de nuevo a bytes

Client

import socket
# El cliente debe tener las mismas especificaciones del servidor
host = '127.0.0.1'
port = 9999

BUFFER_SIZE = 1024 MESSAGE = 'Hola, mundo!' # Datos que queremos enviar with socket.socket(socket.AF_INET, socket.SOCK_STREAM) as socket_tcp:
    socket_tcp.connect((host, port))
    # Convertimos str a bytes
    socket_tcp.send(MESSAGE.encode('utf-8'))
    data = socket_tcp.recv(BUFFER_SIZE)

Fichier de l'unité de configuration

sudo nano /etc/systemd/system/socket_prueba.service
sudo rm -r /etc/systemd/system/socket_prueba.service
[Unit]
Description= Server Relay System: Manager
After=multi-user.target

[Service]
Type=simple
Restart=always
ExecStart=/usr/local/bin/pipenv run python /path/test_server.py

[Install]
WantedBy=multi-user.target

sudo systemctl daemon-reload
sudo systemctl enable socket_prueba.service
sudo systemctl start socket_prueba.service
sudo systemctl status socket_prueba.service

Résultat :

 socket_prueba.service - Server Relay System: Manager
     Loaded: loaded (/etc/systemd/system/socket_prueba.service; enabled; vendor preset: enabled)
     Active: failed (Result: exit-code) since Sat 2021-09-25 16:07:17 -05; 58min ago
    Process: 25771 ExecStart=/usr/local/bin/pipenv run python 

/home/path>
   Main PID: 25771 (code=exited, status=2)

sep 25 16:07:17 serversaas systemd[1]: socket_prueba.service: Scheduled restart job, restart counter is >
sep 25 16:07:17 serversaas systemd[1]: Stopped Server Relay System: Manager.
sep 25 16:07:17 serversaas systemd[1]: socket_prueba.service: Start request repeated too quickly.
sep 25 16:07:17 serversaas systemd[1]: socket_prueba.service: Failed with result 'exit-code'.
sep 25 16:07:17 serversaas systemd[1]: Failed to start Server Relay System: Manager.

Intento 2 Sourcer : systemd et Python

socket avec Python et systemd

 socket_prueba.socket - Socket prueba
     Loaded: loaded (/etc/systemd/system/socket_prueba.socket; disabled; vendor preset: enabled)
     Active: failed (Result: service-start-limit-hit) since Sat 2021-09-25 17:00:47 -05; 4s ago
   Triggers:  socket_prueba.service
     Listen: 127.0.0.1:9999 (Stream)

sep 25 17:00:47 vidm-OMEN systemd[1]: Listening on Socket prueba.
sep 25 17:00:47 vidm-OMEN systemd[1]: socket_prueba.socket: Failed with result 'service-start-limit-hit'.