Ubuntu 20.04上的supervisord不能自动启动

sudo apt update
sudo apt install supervisor

sudo nano /etc/supervisor/supervisord.conf

[unix_http_server]
file=/var/run/supervisor.sock   ; (the path to the socket file)

[supervisord]
logfile=/var/log/supervisor/supervisord.log ; (main log file; default $CWD/supervisord.log)
pidfile=/var/run/supervisord.pid ; (supervisord pidfile; default supervisord.pid)
childlogdir=/var/log/supervisor   ; ('AUTO' child log dir, default $TEMP)

[rpcinterface:supervisor]
supervisor.rpcinterface_factory = supervisor.rpcinterface:make_main_rpcinterface

[supervisorctl]
serverurl=unix:///var/run/supervisor.sock ; use a unix:// URL  for a unix socket

[include]
files = /etc/supervisor/conf.d/*.conf

sudo nano /etc/systemd/system/supervisord.service

[Unit]
Description=Supervisor process control system for UNIX
Documentation=http://supervisord.org
After=network.target

[Service]
ExecStart=/usr/bin/supervisord -c /etc/supervisor/supervisord.conf
ExecStop=/usr/bin/supervisorctl shutdown
ExecReload=/usr/bin/supervisorctl reload
KillMode=process
Restart=on-failure
RestartSec=5s

[Install]
WantedBy=multi-user.target

sudo systemctl daemon-reload

sudo systemctl start supervisord
sudo systemctl enable supervisord

sudo systemctl status supervisord

● supervisord.service - Supervisor process control system for UNIX
     Loaded: loaded (/etc/systemd/system/supervisord.service; enabled; vendor preset: enabled)
     Active: active (running) since ...
       Docs: http://supervisord.org
   Main PID: ...
      Tasks: ...
     Memory: ...
     CGroup: /system.slice/supervisord.service
             └─...

sudo journalctl -u supervisord