Open ghost opened 5 years ago
SIGUSR1 is usually a "re-read config" call.
No. SIGHUP typically reloads config (and re-opens log for some apps). For example, systemd sends /bin/kill -HUP $MAINPID
when ExecReload
is not defined.
SIGUSR1 is used by some programs (e.g. fluentd, auditd, squid, tomcat, dovecot, openvpn and many other...) to reopen logs.
lol, I did confuse things indeed :D Sorry.
Regarding log rotation. Is it possible to do a copy-truncate
instead of close-open
?
This will allow tail -f logfile.log | dosomething.sh
to function across rotations.
Seems useful to add.
+hacktoberfest
Did the log file copy-truncate
get implemented ?
And what about graceful shutdown ?
I'm currently using kill -HUP $(cat ${PID})
or kill -HUP $(pidof monerod)
which is not exactly graceful.
No, and yes, respectively.
I must have missed the commit/patch. Or is it in monero-v0.14.0.x
?
A patch for... a graceful shutdown ? What kind of ungraceful shutdown are you having ?
When running monerod interactively, I'd do a save
followed by exit
to shut down.
The log show the different stages of shutting down.
When running detached, I have to signal the daemon to shut down, and doing a kill -HUP $(cat ${PID})
it's like a crash. And the log just ends.
I'm running up to 3 monerod, bound to different ip addresses, on a local test server, plus 2 on remote servers.
I'm confused. SIGHUP for log rotation is not implemented yet. And yet you are saying you're sending SIGHUP. Is it a simple case of "don't do that then" ? :) Am I missing something ?
If it's that you don't know how to quit, you can use "monerod exit". Signal 15 should also work.
SIGHUP
is used by many programs, as a "soft" way to tell it to end. Just like SIGQUIT
, SIGKILL
and SIGTERM
. I've never used SIGHUP
for logrotation.
When doing a $ ./monero-v0.13.0.4/monerod exit
I get:
2019-02-22 17:31:51,465 INFO [default] Page size: 4096
Error: Couldn't connect to daemon: 127.0.0.1:18081
And that's expected, as this instance is on 192.168.1.71:18081
Ok. SIGTERM
is the graceful shutdown signal. $ kill -s TERM $(cat ${PID})
And come to think of it.
$ curl -X POST http://192.168.1.71:18081/stop_daemon -H 'Content-Type: application/json'
is just as good.
Thanks for your patience :)
You'll have to add --p2p-bind-ip too for "monerod exit" to work. And --testnet/--stagenet if applicable I think.
When monerod and monero-wallet-rpc receives SIGUSR1 signal, they quit just like when they get SIGINT.
Most applications re-open their log files when they get SIGUSR1, and it makes log rotation easier.
I think it will be nice if monerod and the rest support them too.