Hello,
Syslog-ng doesn't do any form of rotation - you're using macros in the destination filenames instead. Contents of macros like $YEAR get parsed from the timestamp of the incoming messages so as long as messages contain older timestamps syslog-ng will (re)open files reflecting these older timestamps and append logs there. There is no need to restart syslog-ng as not the restart changes where logs will get written but the metadata associated with the logs.
IIRC the antique 1.6.8 version you're using also has support for other datetime macros (prefixed with C_ or R_) which reflect the 'C'urrent or 'R'eception timestamp so you can alter the current behaviour - although I wouldn't recommend switching for example to $C_YEAR-$C_MONTH-$C_DAY as it could be confusing to see the last few logs of a given day written to another file than people would expect.
Does this make sense or did I misunderstood your observation?
Regards,
Sandor
On 06/07/2018 01:06 PM, Amin, Jitesh CTR DISA JSP (US) wrote:
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Hello,
So the file rotates now successfully – but what I have noticed is that after the file rotates it collects data for first few minute or so and then it stops collecting data (basically the file size never grows and timestamp never changes to the most latest when I check the file).
I do see that syslog process/service is running. If I restart the service/process, it starts collecting data until the file rotation happens.
Can you please let me know what would be causing this behavior?
Thanks
Jitesh Amin
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From: Amin, Jitesh CTR DISA JSP (US)
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Subject: RE: (U) [syslog-ng] [Non-DoD Source] Re: Rotate syslog-ng log files
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OK skipping the {} made it work and I now see a syslog file with timestamp (year-month-day). Does this mean it should rotate to new log file name (tomorrows timestamp) at midnight tonight? OR I need to add syntax so it rolls everyday with new timestamp. Just wanted to confirm.
Thanks
Jitesh Amin
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balabit.hu> On Behalf Of Scheidler, Balázs
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Subject: Re: [syslog-ng] (U) [Non-DoD Source] Re: Rotate syslog-ng log files
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I mean syslog-ng 1.6.8
On May 30, 2018 22:54, "Balazs Scheidler" <bazsi77@gmail.com < Caution-
mailto:bazsi77@gmail.com > > wrote:syslog-ng does have template support, it just doesnt support braces, which came later.
Just write $YEAR instead of ${YEAR}
On May 30, 2018 09:41, "Gergely Nagy" <algernon@balabit.com <
Caution-mailto:algernon@ > wrote:balabit.com > >>>>> "Amin" == Amin, Jitesh CTR DISA JSP (US) <jitesh.amin.ctr@mail.mil <
Caution-mailto:jitesh.amin. > writes:ctr@mail.mil >
Amin> Let me ask this, with the following config = destination
Amin> syslog { file("/var/log/syslog-${YEAR}-${MONTH}-${DAY}.log");
Amin> };
Amin> It created new file and started writing to it (versus creating
Amin> new syslog.log). Question, if we plan to accept this for now,
Amin> with above config, would it create a new file ever day with
Amin> following file names or no it would not work with v1.6.8
With syslog-ng 1.6.8, it would not create a new file every day, and
would continue writing to syslog-{YEAR}-{MONTH}-{DAY}.log. With newer
versions, it would create files like `syslog-2018-05-30.log`. No `.0`,
`.1` or the like would be appended. That's a convention of logrotate.
With syslog-ng, you get filenames that match the template, they will
have nothing appended or prepended that is not in the filename template.
--
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