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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1answer
605 views

Reduce munin logging level

Munin is quite verbose, and logs a bunch of things into munin-graph.log, munin-html.log, munin-limits.log and munin-update.log at each run of munin-cron. I already reduced munin-node logging level by ...
3
votes
1answer
2k views

Amazon EC2: how to find out detailed CPU usage?

I am running several EC2 instances, and I want to know the exact work my CPU is doing. On "normal" machines I am doing this with munin and its CPU plugin which looks at the statistics provided by ...
3
votes
1answer
6k views

Unable to add new munin node to existing munin master

I'm trying to add a node to an existing munin master (which I didn't setup but which seems to be working fine as it shows graphs for 8 existing nodes) and I'm having some troubles. Here are the steps ...
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3answers
1k views

Munin “Available entropy” when using address space layout randomization

Having just configured Munin for statistics logging on my gentoo server (hardened profile), I am noticing that my "Available entropy" is consitently in the 200-300 range. This seems way to low, so I ...
3
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1answer
151 views

Munin: some pluggins stopped working after moving to different *virtual* host

I used munin as monitoring serfice and I was happy with it. It is located on localhost machine with CNAME being server.domain.com. Trying to access server.domain.com from remote machine showed up ...
3
votes
1answer
413 views

How to send report created by Munin to email once per week

I have a page with Munin reports and I want to send the email with graphs once per week on specific email. Any thoughts on how to achieve this? Thanks!
2
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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 ...
2
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 ...
2
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3answers
247 views

Pulling Server Stats for Remote Monitoring

I'd like to write my own server monitoring app. Ideally it could show stats like load, uptime, cpu activity, most active processes, memory usage by process, etc. What's the best way to grab that ...
2
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2answers
441 views

How to clean a garbage value in Munin

After I rebooted one of my servers, Munin (which runs on another server) seems to have picked up some garbage response from it in the process of rebooting. ...
2
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2answers
2k 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 ...
2
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3answers
2k views

How to monitor HTTP response error codes from nginx using munin?

I'm beginning to use Munin to monitor an in-production Nginx server. One thing I'm particularly interested in graphing is the rate of errors--HTTP responses with codes in the 50x range. I'm wondering ...
2
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3answers
2k views

Munin Graphs - Have one graph/plugin only update once per hour?

I am writing a custom munin plugin/graph and it's slightly computationally expensive. It's also unlikely to change much in a few minutes. Is it possible to have this one graph/plugin only update once ...
2
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2answers
3k views

Network monitoring systems in Python

There are a host of open source network monitoring systems available. I tried we used to use Nagios, I have been hearing good things about Munin too. The thing is most networking monitors are written ...
2
votes
3answers
97 views

Innodb statistics

We're running InnoDB as a MySQL engine and using phpMyadmin to administer our database. Under Status → Query statistics, phpMyadmin gives us the following: We would like to know where these figures ...
2
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2answers
20k views

How should I monitor memory usage/performance in SunOS/Solaris?

Last week we decided to add some SunOS (uname -a = SunOS bbs-sam-belair 5.10 Generic_127128-11 i86pc i386 i86pc) machines into our running munin instance. First off, the machines are pre-configured ...
2
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2answers
2k views

'inode table usage' spiking every morning at 8am

I installed munin on my ubuntu server. It's showing my 'inode table usage' spiking every morning at 8am. It then rapidly curves down and settles over the course of several hours. What might cause ...
2
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1answer
168 views

What does a jagged committed memory graph mean?

We've been attempting to debug load programs on our servers, and along the way we've been looking at some graphs, like this one: (The white spaces are when the server got so hosed we couldn't ...
2
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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 ...
2
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2answers
1k views

How do I run Munin plugins written in Ruby, using RVM?

I try to run some Munin plugins written in Ruby. I would like to use RVM, so Munin needs to know where to find Ruby. I tried to change the line calling munin-cron in the cron file as follows: */5 * * ...
2
votes
3answers
2k views

Avoid Apache's mod_status being exposed by Varnish

An Ubuntu 9.04 box running Apache on 8080 and Varnish on 80. Recently set up Munin and was wondering why Apache graphs are empty. Saw from the logs that Munin is accessing /server-status?auto and ...
2
votes
1answer
705 views

CentOS 7 /proc/net/ip_conntrack: No such file or directory

yesterday I must hard-reset my server and from the reset I can see the following problem in the munin-node.log: 2015/04/28-04:10:02 CONNECT TCP Peer: "[::ffff:127.0.0.1]:58663" Local: ...
2
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1answer
895 views

SELinux: no audit errors but nginx permission errors

I try to isolate a SELinux problem with nging/munin. I see that error message in "/var/log/nging/error.log": [crit] 8802#0: *55 connect() to unix:/var/run/munin/fcgi-html.sock failed (13: ...
2
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1answer
408 views

Munin UNKNOWN spamming

By adding unknown_limit 50 to munin.conf I've been able to drastically decrease the number of emails I receive from hosts that generate an otherwise acceptable level of UNKNOWN values. The problem is ...
2
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1answer
357 views

“sudo: no tty present” for munin plugin using password-less sudo

I am writing a plugin for munin to monitor something on our Ubuntu Linux server (which is on Amazon EC2). The plugin requires running a programme /usr/sbin/rabbitmqctl via sudo. I have the following ...
2
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1answer
834 views

How to optimize munin fw_conntrack script

I have a server with about 65k connections in ip_conntrack. How can I optimize munin script that counts various types of connections (default fw_conntrack script): cat /proc/net/ip_conntrack | awk ' ...
2
votes
1answer
912 views

Can't get IPMI sensor data

I have SuperMicro 1U 6016T-MTHF with Winbond WPCM450 BMC server. Here's my problem: root@foo:~# ipmitool -I open sensor FAN 1 | 8281.000 | RPM | ok | 400.000 | 576.000 | ...
2
votes
1answer
567 views

Munin cdef problem

I'm getting nuts writing a simple plugin to query my ehcache statistics. Look what i have so far: $ munin-run ehcache standardquerycache_cachehits.value 1779609 standardquerycache_cachemisses.value ...
2
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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 ...
2
votes
2answers
486 views

Monitoring System for the cloud?

I need a monitoring system, much like ganglia / nagios that is build for the cloud. I need it to support : Adding / removing nodes dynamically. (Node shuts down, dose not imply node failure...) ...
2
votes
3answers
880 views

What steps are necessary to install Munin on RHEL to track performance of multiple servers

I need to keep track of network, CPU and memory utilization of an application that sits on 5 machines (apache, mysql, memcached). I thought I'd install Munin for this. But I'm getting a little lost in ...
2
votes
1answer
197 views

Munin with intermittent clients

I'm currently using munin to monitor a bunch of linux servers (as well as a few WinXP clients). However, munin does its data collection sequentially, and seems to be very susceptible to timing out ...
2
votes
1answer
139 views

Load average increasing along with firewall throughput

I've just pushed a large change to my backend code and I've noticed a massive increase in the load average in the few hours since the push. I looked at Munin for what the problem might be and I ...
2
votes
1answer
140 views

Munin not plotting all disks

I've inherited a fun munin set up, so this may end up being something weird. I've got a Windows Server 2008 server running "Munin Node For Windows". With the munin-server running on a separate linux ...
2
votes
1answer
175 views

Find out what's running wget on my server

In my access.log I see requests coming from 127.0.0.1 and retrieving server's "/" and then all of graphics and CSS referenced in it. This happens regularly, every 5 minutes. I want to find out what, ...
2
votes
1answer
1k views

Adding total bandwidth graph to Munin

I've been trying to figure this out for an hour... how to get a total bandwidth graph (showing all network traffic) in Munin? I just installed Munin, got several plugins added but what I'd really like ...
2
votes
1answer
341 views

How do I get Apache stats into munin when proxied from nginx?

I have munin plugins for mysql and nginx working, but, I'm not sure how to get the apache plugin working (it's there, I just haven't setup apache yet). nginx proxies requests to apache running django ...
2
votes
1answer
1k views

munin to monitor apache hits on particular URLs

We are having a problem with our web application, and are currently monitoring performance via munin. We have defined a list of URLs that are causing problems, and am hoping for munin to find out from ...
2
votes
1answer
263 views

install Munin on rhel4-32

# cat /proc/version > Linux version 2.6.9-023stab048.6-enterprise (root@rhel4-32) (gcc version 3.4.5 20051201 (Red Hat 3.4.5-2)) #1 SMP Mon Nov 17 19:09:18 MSK 2008 This is Redhat4, right? and i ...
2
votes
1answer
508 views

Error trying to get munin running as a cgi

I'm just cutting my teeth getting munin running (latest 1.4.1 on centos) . It's working but I want it as a cgi frontend so I'm not generating graphs constantly when I look at them a few times a day ...
2
votes
1answer
70 views

Munin not creating html files in Ubuntu

I installed Munin in a Ubuntu Server 14.04 with Apache 2.4.7 But after all configuration, Munin isn't creating the html files in the html dir. This are my files: munin.conf dbdir /var/lib/munin ...
2
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0answers
338 views

Munin disable dynazoom.html

Doing a quick google search for "Munin dynazoom.html doesn't work" yields many results. There doesn't seem to be a solution that works -- at least not that I have seen. I have munin installed on a ...
2
votes
1answer
475 views

How do I configure munin to show separate graphs for virtual hosts on a single server?

I have a machine with several virtual hosts. How do I configure munin and munin-node to break up the network traffic/bandwidth by virtual host? i.e. vhost1.example.com, vhost2.example.com where both ...
2
votes
1answer
169 views

Alert if munin-master contact node

I have installed munin on one of my servers, and munin-node on another server I wish to monitor. I would like an alert if for any reason the node can't be contacted by the master. Is it possible to ...
2
votes
1answer
302 views

Starting Linode instances via StackScripts based on Nagios events

I'm developing a web application (django/gunicorn/nginx) that needs to be scaled out according to load. The app will be hosted on Linodes so I intend to use StackScripts (and maybe Puppet) to start ...
2
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2answers
652 views

Stacking Munin graph plugins

Is there a simple way to stack existing plugin graphs and hide the originals? For example, I'd like to stack ping_ with say, ping_google.com and ping_amazon.com together. Do I need to write a new ...
2
votes
1answer
405 views

Munin fills server memory

In the last weeks, it happened several times to me that my vserver (Debian Lenny) was out of RAM (500M) and therefore wasn't able to run apache anymore. When looking at the processes with top, I saw ...
2
votes
1answer
549 views

Evaluate a Munin graph defined in munin.conf

I have defined an additional graph (in Munin, munin.conf) that calculates the total size of my MySQL database. The index and data sizes are extracted from an external plugin. The definition looks like ...
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vote
3answers
6k views

Configuring the Tomcat Plugin of Munin

It would be great if anyone can share a working configuration for the tomcat_ plugin of munin. I need to monitor several tomcat instances on one machine. So far I can't figure out: which are the ...
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2answers
2k views

Memory Interpretation Graph - Munin

Yesterday I rebooted the web server machine, but I'm trying to figure out why the graph below shows prior rebooting the memory almost full of cache and just a bit of active memory used. Would there be ...