Munin server monitor?

B

basic612

Member
Jun 22, 2006
5
0
151
similar problems here - munin was working great for a couple of days. then after a server reboot (due to required kernel upgrade) the MySQL graphs stopped updating - others were working fine.

support at my datacentre suggested uninstalling and re-installing munin which I did - since then none of my graphs are updating.

munin-node is runnning, and /var/log/munin/munin-node.log is showing these every 5 minutes (which is what was showing when the graphs were updating properly)

2006/08/13-12:05:01 CONNECT TCP Peer: "127.0.0.1:48230" Local: "127.0.0.1:4949"
2006/08/13-12:05:03 Plugin "mailman" exited with status 768. ----
2006/08/13-12:10:02 CONNECT TCP Peer: "127.0.0.1:48268" Local: "127.0.0.1:4949"
2006/08/13-12:10:04 Plugin "mailman" exited with status 768. ----

looking back further in that log I find this:

error: 'Access denied for user 'root'@'localhost' (using password: NO)'
2006/08/12-00:50:01 CONNECT TCP Peer: "127.0.0.1:34920" Local: "127.0.0.1:4949"
2006/08/12-00:50:04 Plugin "mailman" exited with status 768. ----
^Gmysqladmin: connect to server at 'localhost' failed
error: 'Access denied for user 'root'@'localhost' (using password: NO)'
2006/08/12-00:55:01 CONNECT TCP Peer: "127.0.0.1:34943" Local: "127.0.0.1:4949"
2006/08/12-00:55:03 Plugin "mailman" exited with status 768. ----
^Gmysqladmin: connect to server at 'localhost' failed
error: 'Access denied for user 'root'@'localhost' (using password: NO)'

which I guess is why my MySQL graps stopped working. but now that message has gone away and nothing is updating.

so I updated /etc/munin/munin-node.conf and set:

log_level 4

to

log_level 10

I now see this:

Process Backgrounded
2006/08/13-12:15:51 MyPackage (type Net::Server::Fork) starting! pid(29675)
Binding to TCP port 4949 on host *
Setting gid to "10 10"
2006/08/13-12:20:01 CONNECT TCP Peer: "127.0.0.1:48296" Local: "127.0.0.1:4949"
2006/08/13-12:20:04 Plugin "mailman" exited with status 768. ----
mysqladmin: connect to server at 'localhost' failed
error: 'Access denied for user 'root'@'localhost' (using password: NO)'

I still have the MSQL problem - but will get to that later.

I then notice in munin-update.log

Aug 13 12:15:05 [29219] - Unable to update /var/lib/munin/mydomain.com/host.mydomain.com-exim_mailqueue-mails-g.rrd: opening '/var/lib/munin/mydomain.com/host.mydomain.com-exim_mailqueue-mails-g.rrd': Permission denied

looking in that directory I see:

-rw-r--r-- 1 32007 32009 50604 Aug 13 03:15 host.mydomain.com-apache_accesses-accesses80-d.rrd

so it seems like the RRD files (the databases that hold the statistics) have the wrong owner / group set. I fixed this:

[email protected] [/var/lib/munin/mydomain.com]# chown munin.munin *

on the next run the permssions denied errors have gone, and a couple of the graphs have updated. on the run after that all my graphs are updating again apart from the MySQL ones.

the MySQL ones do seem to be related to connection errors following (many) recent cpanel updates on my server... I will leave that for another day though or wait for someone to post findings re. that as it's now time for me to get some lunch :)
 
R

rzderich

Active Member
Nov 20, 2004
31
0
156
cPanel Access Level
DataCenter Provider
Hi!

I try Munin first on one machine, now we have most of the cp servers with munin running. Very good and easy to install. No performance issues or cpu overhead here.

I like easy-to-use easy-to-install tools, my mission is solve customer problems and achieve the best possible uptime, with help like cp and some plug and play tools like the munin addon, life is easy for me :D

All servers run CentOS 4.x 32bit

no issues to report.

Best Regards

Roy.
 
R

rafaelgp

Member
Aug 7, 2006
22
0
151
Hi,

I installed Munin and it working perfectly, I got no problems... But, I wanna disable it without remove it from WHM... How can I do that? There is anyway?



Thank you all.
 
M

mbrando

Active Member
Dec 31, 2004
38
0
156
Hi,

All was good for a few days then exim_mailstats stopped updating on 2 of my servers around the same time. I look in the munin-node.log and see this entry:

2006/08/13-03:15:07 Plugin "exim_mailstats" exited with status 768. ----

Anyone know what "status 768" means. I look on Munin project site but found nothing there.

All other graphs are updating fine.

Mike
 
M

mbrando

Active Member
Dec 31, 2004
38
0
156
Hi,

Some trouble shooting info when graphs are not updating.

SSH into your server and look in /var/lib/munin/plugin-state

If you see an entry there for one of the graph plugins, it mean that the plugin had a problem. I do not know what the contents means. However, you can either delete the file, If you are brave, or rename it to .OLD. That grpah should update on the next cycle or two. It can take 2 cycles to get the visual data on the graph.

Mike
 
R

rafaelgp

Member
Aug 7, 2006
22
0
151
Hi,

I installed Munin and its working perfectly, I got no problems... But, I wanna disable it without uninstall it from WHM... How can I do that? There is anyway?


Thank you all.
 
M

Myron

Member
Feb 28, 2005
7
0
151
Great State of Texas
First time without a hitch

I installed it when it came out with no trouble, made sure it was running, then waited a few hours...
Looks great and very nice graphs -- In fact, I like it better than MRTG

Today, still no problems.. so far

Great job cPanel guys
 
Last edited:
R

Rubas

Well-Known Member
Sep 15, 2003
125
0
166
2 servers: everything is okay
1 server: the apache section of munin disappeard ??
 
S

SoftDux

Well-Known Member
May 27, 2006
1,023
5
168
Johannesburg, South Africa
cPanel Access Level
Root Administrator
Sheldon said:
Dont like all the issues people are having with it.

No digg.

I cant stand cPanel and why it has 50 million different problems all the time.

DirectAdmin doesnt have half of the issues.
Click to expand...
Dude, if you don't like cPanel, get off the list! I'm sure DA has their own Forum, which you can join for free as well.

cPanel happens to work for a LOT of people, and many more of their clients as well. Please don't bother comparing cPanel to ANYTHING ELSE, if it's not for you, then don't have it :)
 
D

dwykofka

Well-Known Member
Aug 6, 2003
394
3
168
because of the nature of monitoring systems you cannot really gauge the load by the amount of cpu the application is pulling itself.

The only real way to check is to turn it off and look at your load, then turn it back on and look. This way you get a real world representation that includes the load to spun off apps/procs.
 
M

mahinder

Well-Known Member
Jun 12, 2003
69
0
156
matrix
mbrando said:
Hi,

Some trouble shooting info when graphs are not updating.

SSH into your server and look in /var/lib/munin/plugin-state

If you see an entry there for one of the graph plugins, it mean that the plugin had a problem. I do not know what the contents means. However, you can either delete the file, If you are brave, or rename it to .OLD. That grpah should update on the next cycle or two. It can take 2 cycles to get the visual data on the graph.

Mike
Click to expand...
doesn't seems to be working
 
T

t9clkclnr

Well-Known Member
Jun 11, 2004
254
0
166
Southern California
i too installed and removed.

i also noticed an increase in cpu at "various" times, that did not occur prior to installation.

Once i removed it, no more cpu usages. It does process a good amount of information to create those graphics.

I would like to be able to install on 1 server and query another. To copy over the stats nightly and then run the graphics from a remote server...

it would be nice to be able to configure this for multiple servers on 1 server to lessen the load and to create a more single point of control and informatoin.
 
M

matthewdavis

Well-Known Member
Jun 26, 2003
90
0
156
NC, USA
For those complaining about the cpu usage, maybe trying a 3rd party monitoring app like Hobbit/Nagios/Zabbix. I use Hobbit and love it. Nagios is a pain to setup. And Zabbix, I haven't tried. It looks good. Hobbit has the advantage of using existing BigBrother scripts. So chances are you can find the probe you are looking for in deadcat.net and plug it into Hobbit with no trouble.

Hobbit - http://hobbitmon.sourceforge.net/
Zabbix - http://www.zabbix.org/
BigBrother - http://bb4.com/
BigSister - http://www.bigsister.ch/ (Another free clone of BigBrother)
 
A

anup123

Well-Known Member
Mar 29, 2004
889
1
168
This Planet
Hi,

EXIM Stats stopped updating after log rotation. Any clue as to how to get this back again. Tried sart stop estart, everything but exim graphs update no more.

No issues with loads ... it's all perect.

TIA
Anup
 
M

Myron

Member
Feb 28, 2005
7
0
151
Great State of Texas
One month later, all graphs are still running.....still amazed things are still chirping here.


Myron said:
I installed it when it came out with no trouble, made sure it was running, then waited a few hours...
Looks great and very nice graphs -- In fact, I like it better than MRTG

Today, still no problems.. so far

Great job cPanel guys
Click to expand...
 
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