Munin is a networked resource monitoring tool that can help analyze resource trends and "what just happened to kill our performance?" problems.

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38
votes
4answers
22k views

Munin vs Nagios

We're currently using Nagios to monitor about 20 Linux machines (services and functional links). I just find out about Munin and I wonder if this is a Nagios replacement, or it can be used together ...
20
votes
2answers
3k views

what does the 'm' unit in munin mean?

I'm using munin as a tool for monitoring my servers. On some of the graphs, the units are marked with a 'm'. For instance, my apache accesses graph is labeled 100m, 200m, 300m, along the y-axis. What ...
19
votes
4answers
17k views

How to reset munin graphs

I'd like to reset all graphs for a certain host in Munin. Anyone who knows how I can do this?
12
votes
2answers
6k views

Change a Munin server and keep the data

We are migrating some servers, and we need tp change our Munin server. Most of the Munin nodes are not changed, and we would want to keep track of the historical data, if possible. I can set up a ...
11
votes
2answers
318 views

How to mark every deploy in munin?

Anyone knows if it's possible to mark every deploy with a red vertical line in munin graphs? It will be great to debug possible performance holes in the code. Thanks in advance!
9
votes
6answers
15k views

Nagios graphing solutions vs Munin/Cacti/Ganglia

I've got a nagios server setup for monitoring ~ 30 Windows servers. I want to add some trending charts. I've read that nagios graphing plugins are simple and many people use seperate, standalone ...
8
votes
6answers
14k views

apache server-status not found. check if mod_status is enabled

I've enabled the apache_ plugins on a munin node: ln -sv /usr/share/munin/plugins/apache_* /etc/munin/plugins/ After restarting the node with service munin-node restart here are the errors I'm ...
8
votes
5answers
10k views

I need to replace munin with something more scalable [closed]

I have used munin on multiple servers for many years with great success, however with more than 100 munin-nodes and when there is load on the clients, the processing is timing out. I have made some ...
8
votes
1answer
3k views

Can someone explain the “use-cases” for the default munin graphs?

When installing munin, it activates a default set of plugins (at least on ubuntu). Alternatively, you can simply run munin-node-configure to figure out which plugins are supported on your system. Most ...
8
votes
1answer
2k views

Can Munin be configured to display hourly graphs?

By default, Munin (I’m using 1.4.5) shows graphs for the day, week, month, and year. Can I configure it to additionally display an hourly graph?
8
votes
1answer
6k views

Interpreting munin graph and committed memory

I've been noticing that my server has been using swap a quite more often now but I can't seem to figure out why. The munin graph shows that the apps memory usage is about 0.7G out of the 1.5G. The ...
8
votes
2answers
292 views

How to disable updates for a host in Munin but keep the historical graphs?

I need to disable updates for a particular host but I want to keep the graphs for historical data. I've tried using update no on the host definition in munin.conf but that removes the host from the ...
7
votes
2answers
3k views

Munin graph size

Munin graphs is very small. That makes some multigrpahs useless for me. Is it possible to increase graph image size?
6
votes
2answers
4k views

How do I change, sort, add, remove graphs with Munin?

To keep an eye on what's happening with our production servers I recently discovered Munin. It was trivial to install but I'm having a lot of trouble working out how to add/remove graphs. I found ...
6
votes
4answers
2k views

What metrics should I monitor on my Linux-server?

I've been tasked with setting up monitoring of 300 servers, doing different things. I've been looking at various tools, such as Nagios, Munin, and others - so I got a pretty good idea on how I can ...
6
votes
1answer
2k views

Munin Postgres plugins: DBD::Pg not found

I'm trying to activate some of the Postgresql plugins for Munin. When I run munin-node-configure --suggest | grep postgres I get the following output: postgres_bgwriter | no | no [DBD::Pg ...
6
votes
4answers
6k views

Better/alternate front-end/graphs for munin? [closed]

I have a munin setup running and I'd like to leave my munin-node setup untouched while getting a longer and more detailed view of the logged data. I want to keep all logged data indefinite. An ideal ...
6
votes
1answer
455 views

Intermittent munin-cron error “There is nothing to do here, since there are no nodes with any plugins”

We've installed munin monitoring on one of our servers. Generally it seems to be working well but occasionally, 4 times in 2 months to be exact, munin-cron has generated the following error: [...
5
votes
4answers
18k views

Munin on Centos 6 - missing perl MODULE_COMPAT_5.8.8

I'm trying to install Munin on a new VPS through yum install munin but I keep getting an error about a missing perl module: Requires: perl(:MODULE_COMPAT_5.8.8). This is the perl version currently ...
5
votes
3answers
5k views

Nginx Munin plugin shows no data

I would like to monitor NGinx stats through Munin but the Nginx plugins show no data. Is it possible to diagnose why only one of the munin nginx plugins seems to be working? The server runs on ...
5
votes
3answers
324 views

Delaying munin notifications

I have a few servers that are monitored by munin, and fairly frequently one of a selection of units has a transient failure to read data. That gets me two emails, one telling me that all the values ...
5
votes
2answers
1k views

Munin's smart plugin keeps reporting an error in the past because of the exit code

My hosting provider has inserted a hard drive into my server which seems to have had some sort of error in the past but a full offline smart check showed that everything is (about) ok at the moment. ...
5
votes
3answers
1k views

Bash-Scripting - Munin Plugin don't work

i have written a munin-plugin to count the http-statuscodes of lighttpd. The script: #!/bin/bash ###################################### # Munin-Script: Lighttpd-Statuscodes # ########################...
5
votes
1answer
935 views

Force Munin email notifications only on status change, not on update

I got Munin to notify me with email if certain values goes above my thresholds. This works very well and I am happy with it. However, there is a small glitch. If any of my values is in critical or ...
5
votes
1answer
3k views

Munin dynamic graph zoom (dynazoom) not working (Nginx, PHP-FPM)

Debian 7.5 Nginx/1.6.0 PHP 5.6.0RC2 (fpm-fcgi) (built: Jul 11 2014 08:17:52) Munin v2.0.21-2 I been searching all over the net for a few days for answers to my problem but it seems like no one knows ...
5
votes
3answers
3k views

Munin not creating HTML files in Ubuntu Server 14.04

I have used munin in several servers and this is the first time is taking me so much time to set it up. When I telnet munin directly, I can list the services, there is no error at the logs and munin ...
5
votes
2answers
524 views

Showing a longer timespan in Munin

I was wondering if it is possible for Munin to store and display data for longer than a year? I did Google around a bit, without much luck.
5
votes
3answers
2k views

munin + nginx: no dynazoom into graphs

I cannot get the Munin dynamic zoom to work. I am rather certain that the problem has something to do with the Nginx configuration. Any attempt to generate a zoomed graph triggers the following error ...
4
votes
6answers
4k views

Are there any tools for monitoring individual Apache virtual hosts in real-time?

I'm looking for a way to monitor and record Apache traffic, separated by virtual host. I am currently using Munin to capture this and other data for the entire server however I can't seem to find a ...
4
votes
1answer
1k views

Interpreting Munin graphs showing available entropy and MySQL slow queries in sync

We're experiencing performance issues on our website, and after reviewing our munin graphs, the only metrics we've found in sync are Available entropy and MySQL slow queries, with the latter ...
4
votes
1answer
3k views

How to change Munin's graph colors?

I started to use Munin for monitoring, but I want to change colors of the graph, which are drawn by it's 'loggrep' plugin. Is there any way to specify colors in the config file?
4
votes
3answers
2k views

Munin Aggregate Graphs from several servers

I am using DNS round robin load balancing and have divided my total traffic onto multiple servers. Each server does around 300-400req/second but I am interested in having an aggregate graph telling me ...
4
votes
1answer
7k views

how to get a total bandwidth graph in munin

I have munin-node in a basic default configuration on all my servers, I would like to create a summary chart that displays total bandwidth in/out http and another chart showing total bandwidth in/out ...
4
votes
2answers
4k views

Configure Munin graphs to show different time periods

I'm running a server with Munin installed through WHM cPanel. I've been googling around and I can't seem to find out how to do the following: A: Change a graph to show a different time period (...
4
votes
1answer
681 views

Munin aggregate graphs are not working

I know this has been asked in several times on many forums before, but still I am struck with similar problem. Individual graphs are working fine however, aggregate graphs are not. I don't even get ...
4
votes
1answer
193 views

Munin - graph not visible when host down

This night, a server of my farm has failed But, in my munin server, i have lost graph of the host which failed during the night. After reboot host (this morning), and few minutes later, this host is ...
4
votes
1answer
432 views

Does jmxremote affect tomcat performance?

I'd like to enable jmxremote to monitor Apache Tomcat resources utilization with Munin, but I want to know if this will affect the servers performance, is so, how much will it be impacted.
4
votes
0answers
148 views

How to add totals into network traffic graphs in munin 1.4.x (like ones in cacti)?

Here's example picture I found with google.
3
votes
2answers
4k views

Munin email notification

I am trying to get munin to notify me via email. I have configured munin and it reports critical and warning values but no alerts are being sent neither is any script being called. Can you please help ...
3
votes
2answers
2k views

Munin - Load old/historic data from a database to prepopulate the graphs?

I have a Munin setup that monitors some data from our database about the number of sales. My munin plugin extracts this data from the database with a query. I could run this query for any time in the ...
3
votes
4answers
2k views

Stop Munin messages from /var/log/syslog

I am using munin on a system which is adding a log entry in syslog everytime the munin-node cron job executes. It is not an issue but it sometimes makes other errors spotting difficult. There are ...
3
votes
2answers
3k views

Munin stopped updating

today at 02:20 I noticed that suddenly Munin stopped updating its graphs. It is not showing blank data, the whole graphs are not being updated anymore. I run CentOs 5.7 (64) and ive installed Munin ...
3
votes
3answers
3k views

Removing a spike from RRDTool database

I've got an RRDtool graph that has a huge spike after a reboot. I've tried using the popular removespikes.pl script on it, but just returns a "No peaks found.!". What's the best way to take care of ...
3
votes
1answer
4k views

HTTP response time profiling

I have a nginx reverse proxy. The server is close to serving 600-700 requests per second. I have a Munin HTTP load time plugin which is outputting this: http://monitor.wingify.com/munin/...
3
votes
2answers
3k views

How to correctly use DERIVE or COUNTER in munin plugins

I'm using munin to monitor my server. I've been able to write plugins for it, but only if the graph type is GAUGE. When I try COUNTER or DERIVE, no data is logged or graphed. The plugin i'm ...
3
votes
1answer
2k views

Munin's fw_conntrack reports strange number of sockets in TIME_WAIT

Ubuntu Server 10.04.1 x86 Munin 1.4.4 Here is what Munin tells me about connections through firewall on my server: Here is what netstat -n has to say about this: $ netstat -an|awk '/tcp/ {print ...
3
votes
3answers
2k views

Puppet, Nagios, Munin on cPanel based hosts [closed]

I've been managing 20-30~ cPanel based hosts over the past year with Puppet, Nagios and Munin for general monitoring / trending however a lot of the methods I've had to use to deploy / manage things ...
3
votes
1answer
1k views

How to migrate Munin graph history

I have a pretty basic munin configuration, with a host in my munin.conf like this [old;name] and a Plugin, that gives host_name: name I changed the munin.conf to [new;name] the host_name in ...
3
votes
2answers
977 views

munin requires perl(RRDs)

I'm in RHEL6.3 and I'm installing munin from epel http://download.fedoraproject.org/pub/epel/6/x86_64/epel-release-6-8.noarch.rpm I already solved all dependencies except this one : Error: Package: ...
3
votes
2answers
224 views

Restore min/avg/max graphs in Munin 2

I just migrated from Munin 1.4 to Munin 2.0.6 on Ubuntu Server 12.04 LTS. The weekly graphs no longer show min/max values, only the avg. How do i get those back? Thanks Maciej