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Ztyx
Asked: 2010-10-09 04:30:52 +0800 CST

How to reset munin graphs

  • 772

I'd like to reset all graphs for a certain host in Munin. Anyone who knows how I can do this?

rrdtool performance-monitoring munin

5 Answers

  1. Best Answer

    Munin data is stored in Round Robin Database files (.rrd). These are stored under /var/lib/munin.

    Each host and hostgroup will have it's own subdirectory under /var/lib/munin

    Delete the .rrd files under the hostname in question, and your data will be zeroed out. Graphs will be re-generated after a few minutes.

    • 40

  2. Or alternatively if you just want to fix the data in the RRD files (for example spike on the network graph on the server reboot), just run:

    rrddtool dump /var/lib/munin/xy/z.rrd >z.xml

    edit the data in xml file (fix big values, but remember they are in scientific notation) and then just re-create the RRD file:

    rrdtool restore z.xml x.rrd

    and overwrite the original RRD with this new one. Using this, you can fix the values and still preserve your old data.

    EDIT: You can find detailed description and howto here: http://munin-monitoring.org/wiki/SpikeRemoval

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  3. Yes, delete all the *.rrd files in the folder where munin generates the graphs (where the .html files are). /var/lib/munin/xyz/. It's defined in your munin.conf (dbdir).

    The rrd files are regenerated on the next run.

    • 2

  4. You should also remove the html files that have been created. They are usually located under /var/www/munin/. In that directory, you will find your hostgroup directories. delete the .png files and the .html file of the graph you want to reset.

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  5. I remove a single type graph with next at master server:

    1. Login as root:

    sudo su

    1. Backup current status:

    cp -rp /var/lib/munin /var/lib/munin.bak

    1. Search and confirm all files to delete for plugin graphs nginx_*:

    find /var/lib/munin -name *nginx_*.rrd

    1. Confirm all files to delete!

    2. Delete graph files for plugin nginx_*:

    find /var/lib/munin -name *nginx_*.rrd -exec rm {} \;

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