Ubuntu – Why the service restarted every 90 seconds

servicesystemctlsystemdUbuntu

I'm working with Ubuntu Server 16.04.

Here's the .service file:

[Unit]
Description=NoDescpt

[Service]
ExecStart=/home/git/cmd/daphnei
Restart=always
KillSignal=SIGQUIT
Type=notify
NotifyAccess=all

[Install]
WantedBy=multi-user.target

And the related script /home/git/cmd/daphnei:

#!/bin/bash
cd /home/git/hsfzmun/server
/home/git/virtualenvs/hsfzmun/bin/daphne -b 0.0.0.0 -p 8001 -v2 config.asgi:channel_layer

What confused me is that the service will restart every 90 seconds, but I can't find out why.

I've found that the service's status is always activating, which means systemd doesn't know that the service has been started. However the script did start because I can visit my website. So what's wrong with it?

Best Answer

You are using 

Type=Notify

in your unit file. It means that the application should notify systemd when it is ready to server via sd-notify Systemd probably receives no notification from your app and restarts it.

Unless your application is sending notification to systemd, you should update corresponding line to

Type=simple

Other option is to check whether daphne can send notification to systemd and turn the notification on.

Check systemd documentation on notify for more details on Type=notify

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