[Gluster-users] How do I rotate **all** the Gluster logs?

[Joe Julian]

Semiosis and I have found copytruncate to be a reliable method to use with logrotate.

Greg Scott <GregScott at infrasupport.com> wrote:

>Thanks Vijay - 
>
>> The appropriate mechanism to do log rotation would be to use
>logrotate command with the 
>> config file available at /etc/logrotate.d/glusterfs. This mechanism
>rotates log files of all glusterfs processes.
>> The log rotate <volname> command will be deprecated in a  future
>release.
>
>I wonder how to do this?  If I am following this correctly - there are
>a bunch of layers to make this happen:
>
>First, a facility named anacron runs periodically to handle things such
>as log file maintenance.  Looking at a file named /etc/anacrontab that
>drives the whole thing:
>
>[root at chicago-fw1 etc]# more /etc/anacrontab
># /etc/anacrontab: configuration file for anacron
>
># See anacron(8) and anacrontab(5) for details.
>
>SHELL=/bin/sh
>PATH=/sbin:/bin:/usr/sbin:/usr/bin
>MAILTO=root
># the maximal random delay added to the base delay of the jobs
>RANDOM_DELAY=45
># the jobs will be started during the following hours only
>START_HOURS_RANGE=3-22
>
>#period in days   delay in minutes   job-identifier   command
>1       5       cron.daily              nice run-parts /etc/cron.daily
>7       25      cron.weekly             nice run-parts /etc/cron.weekly
>@monthly 45     cron.monthly            nice run-parts
>/etc/cron.monthly
>[root at chicago-fw1 etc]#
>
>So cron.daily probably schedules things to run every day, probably at 5
>minutes past midnight.   Cron.weekly and cron.monthly are empty.  
>Looking at /etc/cron.daily:
>
>[root at chicago-fw1 etc]# ls /etc/cron.daily
>00webalizer  certwatch  logrotate  man-db.cron  mlocate  prelink
>[root at chicago-fw1 etc]#
>
>And the script we care about must be logrotate.  Looking at that:
>
>[root at chicago-fw1 etc]# more /etc/cron.daily/logrotate
>#!/bin/sh
>
>/usr/sbin/logrotate /etc/logrotate.conf
>EXITVALUE=$?
>if [ $EXITVALUE != 0 ]; then
>/usr/bin/logger -t logrotate "ALERT exited abnormally with
>[$EXITVALUE]"
>fi
>exit 0
>[root at chicago-fw1 etc]#
>
>A file named /etc/logrotate.conf drives it.  Looking at that file:
>
>[root at chicago-fw1 etc]# more /etc/logrotate.conf
># see "man logrotate" for details
># rotate log files weekly
>weekly
>
># keep 4 weeks worth of backlogs
>rotate 4
>
># create new (empty) log files after rotating old ones
>create
>
># use date as a suffix of the rotated file
>dateext
>
># uncomment this if you want your log files compressed
>#compress
>
># RPM packages drop log rotation information into this directory
>include /etc/logrotate.d
>
># no packages own wtmp and btmp -- we'll rotate them here
>/var/log/wtmp {
>    monthly
>    create 0664 root utmp
>        minsize 1M
>    rotate 1
>}
>
>/var/log/btmp {
>    missingok
>    monthly
>    create 0600 root utmp
>    rotate 1
>}
>
># system-specific logs may be also be configured here.
>[root at chicago-fw1 etc]#
>
>The logrotate .conf file has an include for everything in
>/etc/logrotate.d, so what's in there?
>
>[root at chicago-fw1 etc]# ls /etc/logrotate.d
>chrony      glusterd        httpd        libvirtd       libvirtd.uml 
>samba  syslog          yum
>cups        glusterfsd      iptraf-ng    libvirtd.lxc   ppp          
>squid  vsftpd
>dracut_log  glusterfs-fuse  iscsiuiolog  libvirtd.qemu  psacct       
>sssd   wpa_supplicant
>[root at chicago-fw1 etc]#
>
>And the piece that rotates the Gluster logs:
>
>[root at chicago-fw1 etc]# more /etc/logrotate.d/glusterd
>/var/log/glusterfs/*glusterd.vol.log {
>    missingok
>    postrotate
>/bin/kill -HUP `cat /var/run/glusterd.pid 2>/dev/null` 2>/dev/null ||
>true
>    endscript
>}
>[root at chicago-fw1 etc]#
>
>So the task seems to be editing this file by hand to include the log
>file for my Gluster volume.  Or better, what about just making a file
>named <volume> to rotate the log file associated with <volume> named
>/var/log/glusterfs/<volume>.
>
>My volume name is firewall-scripts.  Here is a first shot at it. 
>Create a file named /etc/logrotate.d/firewall-scripts that looks like
>this:
>
>[root at chicago-fw1 logrotate.d]# more /etc/logrotate.d/firewall-scripts
>/var/log/glusterfs/firewall-scripts.log
>
>There is no way it will be this simple.    It's **never** this simple. 
>
>
>And it's not.
>
>[root at chicago-fw1 logrotate.d]# /usr/sbin/logrotate /etc/logrotate.conf
>error: firewall-scripts:1 missing '{' after log files definition
>error: found error in file firewall-scripts, skipping
>[root at chicago-fw1 logrotate.d]#
>
>It looks like you need a section that restarts the process associated
>with that log file at the end.  Here is where I get a little bit shakey
>- what process should I  be looking for?  Or should I just edit
>/etc/logrotate.d/glusterd?
>
>Here I go again stumbling blindly down Trial and Error Avenue.  I could
>really use some guidance here.  
>
>- Greg
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>Gluster-users at gluster.org
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