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Zabbix item for last line of a log file
Post 303031766 by rbatte1 on Tuesday 5th of March 2019 12:35:33 PM
03-05-2019
Moderator
Maybe I wasn't clear on the initial post. Sorry about that. The process producing the display doesn't have direct access to the file.
We have multiple CentOS servers running various positions of our application testing programme and I'm being asked to get a display together which shows how they're all doing, batch state etc.. We destroy and re-create them all the time, but the Zabbix agent is in our VMWare template already so that is the mechanism of choice to get the data. It's shouldn't be too hard, but I'm stuck.
The server showing the display doesn't have access to the log file directly (NFS, SMB or an SSH password-less connection defined) If we did have, I could simply tail -1 /path/to/log but because we a frequently rebuilding, I'd rather not have to add another few steps and more complexity between them. There's lots to do already when we build them. With Zabbix, I can get the file contents but only for a small file, and these log files I want to read are very large.
We don't dare have Zabbix remote commands enabled because that is an entry point to attack the server. I know I can define the Zabbix item type as log with a key of log[/path/to/file], but then I don't know how to get at the content/last line.
The files will get quite large, but I can set the history low, because after that we just want the current position.
I'm happy to define the type as log if I could get that to work, but all I get back is a large number.
Naturally anything I can define in Zabbix will be added to the existing template so I don't have to set that up every time too.
I'm sure I'm missing something simple,
Robin (feeling like a fool
)
We have multiple CentOS servers running various positions of our application testing programme and I'm being asked to get a display together which shows how they're all doing, batch state etc.. We destroy and re-create them all the time, but the Zabbix agent is in our VMWare template already so that is the mechanism of choice to get the data. It's shouldn't be too hard, but I'm stuck.
The server showing the display doesn't have access to the log file directly (NFS, SMB or an SSH password-less connection defined) If we did have, I could simply tail -1 /path/to/log but because we a frequently rebuilding, I'd rather not have to add another few steps and more complexity between them. There's lots to do already when we build them. With Zabbix, I can get the file contents but only for a small file, and these log files I want to read are very large.
We don't dare have Zabbix remote commands enabled because that is an entry point to attack the server. I know I can define the Zabbix item type as log with a key of log[/path/to/file], but then I don't know how to get at the content/last line.
The files will get quite large, but I can set the history low, because after that we just want the current position.
I'm happy to define the type as log if I could get that to work, but all I get back is a large number.
Naturally anything I can define in Zabbix will be added to the existing template so I don't have to set that up every time too.
I'm sure I'm missing something simple,
Robin (feeling like a fool
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LEARN ABOUT DEBIAN
torrus_monitor
TORRUS_MONITOR(8) torrus TORRUS_MONITOR(8) NAME
monitor - Torrus Monitor. SYNOPSIS
torrus monitor --tree=TREENAME [options...] DESCRIPTION
This command starts the Monitor process for the tree TREENAME. By default it forks into a daemon, sets the log output file to /var/log/torrus/monitor.TREENAME.log, performs one monitoring cycle, and sleeps until the next cycle is scheduled. In daemon mode the log file can be reopened by sending it a SIGHUP signal. OPTIONS
--nodaemon Prevents the process from becoming a daemon and sets the log to STDERR. --runonce Instructs the script to run once and exit. Implies --nodaemon. --delay=N Makes the daemon sleep for N minutes before starting the first cycle. This would happen on the daemon startup and also after each configuration recompilation. For example, when monitor and collector start simultaneously, the collector needs some time to retrieve the data being monitored. --debug Sets the log level to debug. --verbose Sets the debug level to info. --help Displays a help message. FILES
/etc/torrus/conf/torrus-siteconfig.pl Torrus site configuration script. /var/log/torrus/monitor.TREENAME.log Monitor's log for the tree TREENAME. SEE ALSO
torrus(8) NOTES
See more documentation at Torrus home page: http://torrus.org AUTHOR
Stanislav Sinyagin <ssinyagin@yahoo.com> torrus 2.03 2013-07-26 TORRUS_MONITOR(8)