Xen Cluster Management With Ganeti On Debian Lenny

[kimmo]

I'm following Falko 's "Xen Cluster Management With Ganeti On Debian Lenny" and run to kinda simple problem but cannot resolve it.

At the point "7 Adding node2.example.com To The Cluster" :

---------------------------------------------------------------
vili3:~# gnt-node add vili4.domain.fi
-- WARNING --
Performing this operation is going to replace the ssh daemon keypair
on the target machine (vili4.domain.fi) with the ones of the current one
and grant full intra-cluster ssh root access to/from it

Failure: command execution error:
Node 'vili4.domain.fi' claims it has a different hostname than the one the resolver gives: hostname mismatch, got vili4. Please fix and re-run this command.
vili3:~#
---------------------------------------------------------------

I have 2 nodes installed from scratch with same hardware. Reverse dns names are correct in nameservers, and /etc/hosts also.

"ssh root@vili4.domain.fi" works ok also. Any ideas ?

[angeloalfa]

I have your same problem...

[angeloalfa]

I have resolved:
Was necessary also, the file /etc/hostname which configures the hostname of the system should contain node1.example.com and not just node1.
Hello

[emotioneu]

followed the how-to and just can't figure out why the command gnt-cluster verify gives me following output:

* Verifying global settings
* Gathering data (1 nodes)
* Verifying node emotion1.EMOTION
- ERROR: ssh communication with node 'emotion1.EMOTION': hostname mismatch, got emotion1
* Verifying orphan volumes
...

more than this - if i add an instance it just "seems" to work, but is in ERROR_down state if i try to connect.

tia for any help

emo

[falko]

Originally Posted by emotioneu

- ERROR: ssh communication with node 'emotion1.EMOTION': hostname mismatch, got emotion1

What does

uname -n

show on that node? It should be emotion1.EMOTION.

[emotioneu]

hell yes ... hostname / uname -n was emotion1 although it should have been emotion.EMOTION ... i'm so

had tripple checked that but didn't realize it

big thx for that

anyway - now that the cluster is up and running - i can't add an instance.

gnt-instance add -t drbd -n emotion1.EMOTION:emotion2.EMOTION -o debootstrap -s 2500 --swap-size 256 -m 64 --kernel /boot/vmlinuz-2.6.26-1-xen-686 --ip 192.168.1.111 inst1.EMOTION

the * creating instance disks... part takes years (*g*) and than finally fails and exits.

i looked at the lvm (with lvdisplay) and can see that those two disks are being created at node2 (emotion2) but nothing happens on node1 (emotion1).

seems strage to me - has anyone a clue of what i'm missing ...

error - (gnt-instance add)
##########
Unhandled error in Deferred:
Traceback (most recent call last):
File "/usr/lib/python2.5/site-packages/twisted/spread/pb.py", line 526, in expressionReceived
method(*sexp[1:])
File "/usr/lib/python2.5/site-packages/twisted/spread/pb.py", line 895, in proto_answer
d.callback(self.unserialize(netResult))
File "/usr/lib/python2.5/site-packages/twisted/internet/defer.py", line 243, in callback
self._startRunCallbacks(result)
File "/usr/lib/python2.5/site-packages/twisted/internet/defer.py", line 312, in _startRunCallbacks
self._runCallbacks()
--- <exception caught here> ---
File "/usr/lib/python2.5/site-packages/twisted/internet/defer.py", line 328, in _runCallbacks
self.result = callback(self.result, *args, **kw)
File "/var/lib/python-support/python2.5/ganeti/rpc.py", line 94, in cb_done
tb))
ganeti.errors.RemoteError: Remote procedure error calling blockdev_create on emotion2.EMOTION:
Traceback (most recent call last):
File "/usr/sbin/ganeti-noded", line 87, in perspectiveMessageReceived
state = method(*args, **kw)
File "/usr/sbin/ganeti-noded", line 104, in perspective_blockdev_create
return backend.CreateBlockDevice(bdev, size, owner, on_primary, info)
File "/var/lib/python-support/python2.5/ganeti/backend.py", line 839, in CreateBlockDevice
" daemon logs" % errorstring)
BlockDeviceError: Can't assemble device after creation, very unusual event - check the node daemon logs

failed to create volume sda (<DRBD8(hosts=emotion1.EMOTION-emotion2.EMOTION, port=11006, configured as 192.168.1.101:11006 192.168.1.100:11006, backend=<LogicalVolume(/dev/xenvg/76cd733a-2b01-4c5c-a60b-49beabd04ad1.sda_data, not visible, size=2500m)>, metadev=<LogicalVolume(/dev/xenvg/49369ca3-930f-426f-b023-8e408afd744e.sda_meta, not visible, size=128m)>, visible as /dev/sda, size=2500m)>) on secondary node emotion2.EMOTION!
Failure: command execution error:
Device creation failed, reverting...
##########