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I have a pretty basic munin configuration, with a host in my munin.conf like this


and a Plugin, that gives host_name: name

I changed the munin.conf to


the host_name in the Plugin remained the same.

Now the Plugin shows, but there's no history (no surprise). I need to migrate the graph's history. Is there a way?

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up vote 3 down vote accepted

Locate the files in /var/lib/munin. Directory strutcure will be old/name*. Move the files to new/name*. You will loose the history between when you made the change and now.

If you plan such moves in the future, create hard links in the new destination before the change. Then remove the old files after the change.

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than for the tip for future migrations. Is there a chance of merging the data? – keppla Mar 28 '11 at 7:12
It should be possible to export the data from one RRD file and import them into the other with rrddump and rrdrestore from the RRDtools (, which is what munin uses to create the graphs. – Sven Mar 28 '11 at 7:43
thank you for the help – keppla Mar 28 '11 at 8:26

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