After logrotation Dovecot still writes to old log file

Michael Heuberger

15 Jun 2018 15 Jun '18

1:30 a.m.

Hi there

This is weird. On my latest Ubuntu server Dovecot seems to write to /var/log/dovecot.log.1 instead of a recently created /var/log/dovecot.log

Here my logrotate config for Dovecot:

/var/log/dovecot.log { su root syslog rotate 7 missingok copytruncate create 666 root syslog sharedscripts postrotate doveadm log reopen endscript }

Doveadm should reopen it but no, still writes to old log file.

Not sure, maybe it's someone else, not dovecot, writing to the log file?

And here the versions:

# 2.2.33.2 (d6601f4ec): /etc/dovecot/dovecot.conf # Pigeonhole version 0.4.21 (92477967) # OS: Linux 4.14.49-rh65-20180612025235.xenU.x86_64 x86_64 Ubuntu 18.04 LTS

How can we investigate best? Or is there a mistake in the above logrotate config?

Michael

Binary Kitchen Michael Heuberger 1/33 Parrish Road Sandringham Auckland 1025 (New Zealand)

Mobile (text only) ... +64 21 261 89 81 Email ................ michael@binarykitchen.com Website .............. http://www.binarykitchen.com

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Stephen Satchell

15 Jun 15 Jun

4:19 a.m.

...

From the manpage: SIGNALS Dovecot handles the following signals as described:

   USR1   Force dovecot to reopen  all  configured  log  files
   (log_path, info_log_path and debug_log_path).

So, you need to add

kill -s USR1 cat /var/run/dovecot/master.pod

(or wherever your distribution puts the PID for dovecot) in your log-rotate file, to tell Dovecot to use the new log file. Alternatively, check to see if "doveadm" is installed in your system; if not, that would cause exactly the symptoms you are seeing.

On 06/14/2018 03:30 PM, Michael Heuberger wrote:

...

Hi there

This is weird. On my latest Ubuntu server Dovecot seems to write to /var/log/dovecot.log.1 instead of a recently created /var/log/dovecot.log

Here my logrotate config for Dovecot:

/var/log/dovecot.log { su root syslog rotate 7 missingok copytruncate create 666 root syslog sharedscripts postrotate doveadm log reopen endscript }

Doveadm should reopen it but no, still writes to old log file.

Not sure, maybe it's someone else, not dovecot, writing to the log file?

And here the versions:

# 2.2.33.2 (d6601f4ec): /etc/dovecot/dovecot.conf # Pigeonhole version 0.4.21 (92477967) # OS: Linux 4.14.49-rh65-20180612025235.xenU.x86_64 x86_64 Ubuntu 18.04 LTS

How can we investigate best? Or is there a mistake in the above logrotate config?

Michael

Michael Heuberger

5:17 a.m.

Thanks man

You suggesting the same as https://wiki2.dovecot.org/Logging says?

postrotate kill -s 0 cat /var/run/dovecot/master.pid || kill -s USR1 cat /var/run/dovecot/master.pid endscript

Well, I already tried that and didn't work. Hence my guess that it's something else.

On 15/06/18 13:19, Stephen Satchell wrote:

...

From the manpage: SIGNALS Dovecot handles the following signals as described:
    USR1   Force dovecot to reopen  all  configured  log  files
    (log_path, info_log_path and debug_log_path).
So, you need to add

kill -s USR1 cat /var/run/dovecot/master.pod

(or wherever your distribution puts the PID for dovecot) in your log-rotate file, to tell Dovecot to use the new log file. Alternatively, check to see if "doveadm" is installed in your system; if not, that would cause exactly the symptoms you are seeing.

On 06/14/2018 03:30 PM, Michael Heuberger wrote:

...
Hi there

This is weird. On my latest Ubuntu server Dovecot seems to write to /var/log/dovecot.log.1 instead of a recently created /var/log/dovecot.log

Here my logrotate config for Dovecot:

/var/log/dovecot.log { su root syslog rotate 7 missingok copytruncate create 666 root syslog sharedscripts postrotate doveadm log reopen endscript }

Doveadm should reopen it but no, still writes to old log file.

Not sure, maybe it's someone else, not dovecot, writing to the log file?

And here the versions:

# 2.2.33.2 (d6601f4ec): /etc/dovecot/dovecot.conf # Pigeonhole version 0.4.21 (92477967) # OS: Linux 4.14.49-rh65-20180612025235.xenU.x86_64 x86_64 Ubuntu 18.04 LTS

How can we investigate best? Or is there a mistake in the above logrotate config?

Michael

Binary Kitchen Michael Heuberger 1/33 Parrish Road Sandringham Auckland 1025 (New Zealand)

Mobile (text only) ... +64 21 261 89 81 Email ................ michael@binarykitchen.com Website .............. http://www.binarykitchen.com

Sami Ketola

8:10 a.m.

...

On 15 Jun 2018, at 5.17, Michael Heuberger michael.heuberger@binarykitchen.com wrote:

Thanks man

You suggesting the same as https://wiki2.dovecot.org/Logging https://wiki2.dovecot.org/Logging says?

postrotate kill -s 0 cat /var/run/dovecot/master.pid || kill -s USR1 cat /var/run/dovecot/master.pid endscript Well, I already tried that and didn't work. Hence my guess that it's something else.

Does '/usr/bin/doveadm log reopen' work?

Sami

Michael Heuberger

8:19 a.m.

Yes and no difference. Same problem.

I think it's this bug

https://www.dovecot.org/pipermail/dovecot/2017-November/109971.html

But cant upgrade when on Ubuntu ... that is still not out.

On 15/06/18 17:10, Sami Ketola wrote:

...

...
On 15 Jun 2018, at 5.17, Michael Heuberger mailto:michael.heuberger@binarykitchen.com> wrote:

Thanks man

You suggesting the same as https://wiki2.dovecot.org/Logging says?

postrotate kill -s 0 cat /var/run/dovecot/master.pid || kill -s USR1 cat /var/run/dovecot/master.pid endscript Well, I already tried that and didn't work. Hence my guess that it's something else.

Does '/usr/bin/doveadm log reopen' work?

Sami

Binary Kitchen Michael Heuberger 1/33 Parrish Road Sandringham Auckland 1025 (New Zealand)

Mobile (text only) ... +64 21 261 89 81 Email ................ michael@binarykitchen.com Website .............. http://www.binarykitchen.com

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4 comments

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participants (3)

Michael Heuberger
Sami Ketola
Stephen Satchell