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

learn more… | top users | synonyms

2
votes
3answers
241 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
votes
2answers
411 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
votes
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
votes
2answers
2k 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
1answer
1k 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/ ...
2
votes
3answers
94 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
votes
3answers
16k 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
votes
2answers
3k 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
votes
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
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 ...
2
votes
1answer
300 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
votes
1answer
257 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
votes
1answer
668 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
311 views

Munin - Netstat Graph

I've installed Munin on a couple of our servers (CentOS) so I'll have some way to monitor what is going on. [Sorry the images arn't embedded in, as it turns out new user's can't post images directly] ...
2
votes
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
votes
1answer
153 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
votes
1answer
685 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
914 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
477 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
874 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
195 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
18 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
74 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
2answers
185 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
2
votes
1answer
167 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
986 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
4k 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 ...
2
votes
1answer
293 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
259 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
462 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
0answers
280 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
132 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
288 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
votes
2answers
573 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
390 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
530 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 ...
1
vote
4answers
5k 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 ...
1
vote
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 ...
1
vote
2answers
3k 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 ...
1
vote
3answers
5k views

How to export munin raw data to CSV?

I'm monitoring my Debian GNU/Linux server with Munin monitoring software. I was wondering whether I could export the raw data used to generate Munin charts? I want to do some in-depth statistical ...
1
vote
2answers
672 views

How to read the scale of the munin monitoring system, tomcat accesses by day graph

The tomcat accesses by day graph in munin has a y axis that shows "accesses / second", and currently shows "66 m". It can't be 66 million accesses per second, a single server couldn't return that ...
1
vote
2answers
114 views

set — $(cat /proc/loadavg)

Hi I have a munin plugin that does this load_fetch() { set -- $(cat /proc/loadavg) cat <<EOF ...
1
vote
2answers
1k 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 ...
1
vote
4answers
742 views

Will running RRDtool or Cacti slow down my servers performance?

I'm consider running some performance profile tools like Cacti for my server, but I'm concerned that running RRDtool or Cacti slow down my servers performance? Is this a valid concern for me? Or ...
1
vote
1answer
360 views

What is the syntax for munin eth1 traffic?

I want my nodes' eth0 and eth1 traffic side by side in a single munin graph, like I have for load. I can't find the variable names for eth0 and eth1. For load it's myserver.com:load.load Any ideas? ...
1
vote
1answer
181 views

Disk IOs spikes at set times in CentOS

I recently installed Munin on my servers. Now 2 of my machines show big spikes in DiskIO at the same time, everyday at 4am. I run Centos 5.6 (64bit). I've checked my cron logs, and I have no personal ...
1
vote
1answer
89 views

is there any problem with my server

Below is a Munin Service Monitor screenshot for netstat by day which have a lot of failed connection. so I need to know is this a serious issue?
1
vote
1answer
14 views

How to customize munin alert message text

So, I use munin to monitor a couple hundred servers and I love it. I am trying to tweak the alert text to look a little different however, and I'm not understanding how to get it to do what I want. I ...