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MW1
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Jul 29, 2009

Does the F5 delete ungzip'd log files

All,

 

I had an issue that required me to unzip the old ltm log files (in var/log), but I just viewed them via a SSH session (never copied them off), however the following day the unzipped log files are gone.

 

 

Is it part of the archive process that deletes any unzipped files called ltm? Just wondering if there is anyway to recover them.

 

 

thanks in advance

 

 

W60

7 Replies

  • apologies -realised my first explaination is as clear as mud. Here are the steps I did:

     

     

    1) SSH to LTM running 9.4 and go in to the /var/log folder

     

    2) Unzipped the previous days log file :

     

    gzip -d ltm.1.gz

     

     

    fter viewwing the file forgot to recompress it so ended up leaving the log in /var/log/ (so full path of the file was /var/log/ltm.1 )

     

     

    3) Came back the following day and the ltm.1 file was missing from the folder and I can't seem to see it in any of the archives

     

     

    This happened on two LTM's so presuing this is by design to keep logs files in order but was wondering if anyone can explain what happened to the log files?

     

     

    thanks
  • Under normal circumstances I wouldn't expect the unzipped file to ever be removed. You can try searching for a solution on the logrotate script on AskF5 and/or check the config on your unit for details on log management.

     

     

    Aaron
  • ssh to it

     

    bigpipe shell

     

    logrotate list all

     

     

    pay attention to the rotate line

     

  • also go to /var/run/config

     

    and look at the logrotate_common.conf and logrotate.conf

     

    but I think what you are looking for is in /var/run/config/logrotate.d/syslog-ng

     

     

    Hope it helps.
  • For details on the logrotate options, you can also check the help:

     

     

    b logrotate help

     

     

    SOL7115 also has more info:

     

     

    SOL7115: Managing log files on the BIG-IP system

     

    https://support.f5.com/kb/en-us/solutions/public/7000/100/sol7115.html

     

     

    Aaron
  • Watcher60,

     

     

    I tested the scenario that u mentioned, and indeed ltm.1 file was gone the next day.

     

    If I add nocompress /var/run/config/logrotate.d/syslog-ng then ltm.1 file will be there.

     

    So it looks like the compression touch the ltm.1.

     

     

     

    THIS IS AN AUTO-GENERATED FILE -- DO NOT EDIT!!!

     

     

    Use the bigpipe shell utility to make changes to the system configuration.

     

    For more information, see bigpipe logrotate help.

     

    /var/log/ltm /var/log/gtm /var/log/messages /var/log/secure /var/log/maillog /var/log/boot.log /var/log/cron /var/log/pktf

     

    ilter /var/log/em /var/log/asm /var/log/tmm /var/log/tmm[0-9] /var/log/daemon.log /var/log/kern.log /var/log/bcm56xxd /var

     

    /log/audit /var/log/user.log /var/log/wa/pvac.log /var/log/wa/comm_srv.log /var/log/confpp.log {

     

    nocompress

     

    missingok

     

    notifempty

     

    sharedscripts

     

    postrotate

     

    /bin/kill -HUP `cat /var/run/syslog-ng.pid 2> /dev/null` 2> /dev/null || true

     

    endscript

     

    }

     

  • Guys - many thanks for the responses (long weekend hence hadn't had chance to dig)

     

     

    I'm presuming then it must match any ltm* file.

     

     

    Anyway - thanks again for the response - as always sounds like I have some reading to do!

     

     

    W60