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Old 12-27-2006, 10:58 AM   #1
browny_amiga
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Question EVMS no-plugin displaying


Hi

I am using Debian etch and am trying to configure software RAID. Now I found EVMS which looks like a nice way to do it GUI based.

When using the program, any action with create ends up in a dead end situation, be it creating a EVMS Volume, Compatibility Volume, Feature Object, Region, Container, or Segment, it always ends up in a list which no entries to choose from (no items were found that match the search criteria) and no active next button.

When starting the program, it reports the following errors, which should not be a problem, since I don't intend to use THAT functionality:

FATAL: Module dm_mod not found.
Engine: Unable to open the control node for Device-Mapper. The Engine will run without Device-Mapper support.

Engine: The plug-in Linux-HA in module /lib/evms/2.5.5/ha-1.1.1.so failed to load. The plug-in's setup_evms_plugin() function failed
with error code 19: No such device.

Now the strange thing is that although it does not show any plugins when for example create Feature Object, but when checking out the plugins that are installed and available, they are all there.

Debugging, even when put to maximum does not make a noise about what is going wrong. I installed the kernel patch (I have a custom one), but don't see EVMS complaining about anything concerned with it, so I guess it is working as it should kernel wise.

Anybody have experience with EVMS and can give me some pointers?

thanks

Markus

Last edited by browny_amiga; 12-27-2006 at 11:00 AM.
 
Old 12-28-2006, 09:23 PM   #2
stress_junkie
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Quote:
Originally Posted by browny_amiga
When starting the program, it reports the following errors, which should not be a problem, since I don't intend to use THAT functionality:

FATAL: Module dm_mod not found.
Engine: Unable to open the control node for Device-Mapper. The Engine will run without Device-Mapper support.

Engine: The plug-in Linux-HA in module /lib/evms/2.5.5/ha-1.1.1.so failed to load. The plug-in's setup_evms_plugin() function failed
with error code 19: No such device.
Oh, I think that you DO need THAT functionality. The dm_mod is for the device mapper software, as the error message indicates. Yeah. You need that to make EVMS work.

Try installing the dm_mod by hand before running the EVMS configuration utility.
Code:
su -
<password>
modprobe dm_mod
lsmod | grep dm_mod
When you run the modprobe command it will either succeed silently or it will provide an error message if it fails.

Running the lsmod command piped to grep searching for dm_mod will let you know if dm_mod is installed. If you don't get any output then it is not installed. This is not really necessary since the modprobe command reports failures.
 
Old 01-16-2007, 07:41 AM   #3
browny_amiga
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Ok, tried with a debian stock kernel, 2.6.18-3 and the dm_mod is now loading, the first error message is gone. The one with the HA is still there, but same result. Sadly, no way to use the tool, having all the create plugins empty.

I don't understand why the thing is failing.

but thanks for the tip


Markus
 
Old 01-16-2007, 05:41 PM   #4
xjlittle
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HA is for the heartbeat application. You will need to install that to make the error go away.
 
Old 01-17-2007, 04:36 AM   #5
browny_amiga
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I installed the HA (Linux High availability 2) and the error disappeared...
Now I the thing still does not work at all, the message in "EVMS feature plugin" is still "no items were found matching the search criteria" and the next button is ghosted out.
This is displayed in all create operation, rendering the tool totally useless and looks like I have reached a dead end. Too bad, evms looks like a great tool, sad that it does not work and does not provide any error to go problem solving with.

But thanks for the feedback, I got the errors that it does display wiped out.

Markus
 
  


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