Hi Jeff,
or something else. Downgrading back to leveldb 1.7.0-2 resolved my problem.
Is anyone else seeing this?
It sounds a bit like what I reported here:
http://tracker.ceph.com/issues/7918
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Hi,
Perhaps as a workaround you should just wipe this mon's data dir and
remake it?
That's a possibility ofcourse!
I really would like to know if there's something to gain from using
leveldb from ceph-extras instead of the distribution?
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#x27;m not sure what could be unique about my leveldb store. The only thing
I can think of is that this cluster was initially installed with
Argonaut, and has over time been upgraded through Bobtail, Cuttlefish,
Dumpling and now Emperor.
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g const&) ()
#9 0x005cf5d1 in main ()
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imilar, or have an idea?
Thanks in advance,
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g the latest Ceph version, this is only the case if you're running
an old (6.0) Debian installation.
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the
configured mons.
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vote is odd or even.
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ould 3
out of 7 be sufficient?
The magic number here is 4.
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n
the system to 3 (or 1).
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then check if that filesystem is really mounted.
Perhaps you're just seeing them as empty because the mount failed for
some reason.
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version before 0.61.4 to a later version, you'll
need to restart all the monitors before they form a new quorum.
This was mentioned in the release notes.
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ed to restart the two other mons to fix the
problem.
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uld possible shift things into place.
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ou're only using the storage for scratch disks or
something like that.
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Hi,
service ceph stop mon
doesn't work.
how i can stop some osds or mons ?
Try for example:
service ceph stop mon.a
or
service ceph stop osd.1
replacing "a" and "1" with the id, you want to stop.
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e client will also need a file
containing the secret or a keyring.
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formation after creating it (YMMV).
At first I was a bit confused as the log indicated "File not found" for
my rbd images, but I found that I had simply forgotten to add the
oneadmin user to the "cloud" group.
Next steps for me: add rbd_cache and patch qemu with the async flu
, it is in 1.4.2 as well.
Are there many such things?
That's the only thing I know of.
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kernel,
but I guess you swap it out for a later version?
The rbds for all my existing VMs would probably have to be converted
back from format 2 to format 1, right?
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I found the RPMs on ceph.com with the patches
backported to the existing qemu version on CentOS - and that worked fine
as far as qemu-kvm goes.
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on, so I'm more
inclined to 12.10.
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know if this is
available as a backport from somewhere else, as my attempts to simply
upgrade qemu didn't go well.
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?
Or is it merely the case, that you cannot configure it on a per-VM
basis, so that you have to rely on the default settings in ceph.conf?
(which wouldn't be a problem for me)
Any advice you could give would be greatly appreciated!
Thanks,
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Hi Jon,
OpenNebula version 4.0 has added extra support for Ceph. It is currently
out in a release candidate. As you're just starting to build your
Just realized that OpenNebula 4.0 has actually been released a few weeks
ago!
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t work has already been done by the OpenNebula team.
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ed storage" - you do not need to go through all that.
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ver will be required?
The recommendation seems to be to have no RAID-cards at all. Just setup
one OSD per physical drive.
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. but there are still systems out
there that doesn't support suspend/resume.
It would be nice to be able to backup a running VM no matter what
software is actually running inside.
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Hi,
IMHO interaction QEMU & kernel's FREEZER (part of hibernation & cgroups) can
solve many of problems. It can be done via QEMU host-2-guest sockets and scripts
That would require a cooperating VM. What I was looking at was how to do
this for non-cooperating VMs.
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rbd with qemu-kvm and librbd?
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could then be used to store that backup on a
secondary Ceph cluster or on simple storage.
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t the same time (like for
example the OCFS2 file system).
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h adding only a few
percent to the total costs.
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ystem on
your platform. On my Fedora system it look like this:
service ceph start mds.a
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Hi,
So it seems that I can't find the ceph-mds process at all. Similarly, my
Clearly this indicates a pretty deep problem, how can I go about seeing
what's wrong with ceph-mds?
Start it up and check what is written in /var/log/ceph/ceph-mds.a.log.
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e mds process is still running.
Then check the mds logfile to see if it has logged errors or a crash
message.
If you still haven't found any problems, try checking the network to see
if you connectivity between the servers. Ensure that you haven't
firewalled the mds so that it cannot
kes a huge impact on the perceived performance of the guests!
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he servers involved?
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yet in the newest version? - if so, could someone please
direct me to a patch?
Thanks!
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