Activate core dumps on a go program launched via systemd

You have to set the 2 following line in unit file:

LimitCORE=infinity # unlimited core file size
Environment=”GOTRACEBACK=crash”

example:

[Unit]
Description=

[Service]
User=toto
WorkingDirectory=/home/toto
LimitCORE=infinity
Environment="GOTRACEBACK=crash"
ExecStart=/usr/local/bin/my-super-go-programm -port 2401

[Install]
WantedBy=multi-user.target

In case of panic core files will be stored in /home/toto. You can load them in a debugger for analysis.

Go offers this nice feature out of the box: when you send it SIGQUIT signal, it exits with a stack dump. The stack dump is shown for all goroutines, so you can know what each “thread” was doing at the time of receiving SIGQUIT.

kill -QUIT <pid>

So in practice you can test the proper working of this coredump activation.