On Nov 27, 2015 3:34 AM, "NEVEU Stephane" <stephane.neveu@xxxxxxxxxxxxxxx> wrote:
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> Ok, I think I got it. It seems to come from here :
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> tracker.ceph.com/issues/6047
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> I’m trying to snapshot an image while I previously made a snapshot of my pool… whereas it just works fine when using a brand new pool. I’m using ceph v0.80.10 on Ubuntu 14.04. As I see, it has been patched since dumpling. Could it be a regression ?
Pool snapshots and the "self-managed" snapshots used by rbd are incompatible. You have to pick one or the other on each pool.
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> De : ceph-users [mailto:ceph-users-bounces@xxxxxxxxxxxxxx] De la part de NEVEU Stephane
> Envoyé : jeudi 26 novembre 2015 15:49
> À : ceph-users@xxxxxxxxxxxxxx
> Objet : rbd_inst.create
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> Hi all,
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> I’m using python scripts to create rbd images like described here http://docs.ceph.com/docs/giant/rbd/librbdpy/
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> rbd_inst.create(ioctx, 'myimage', size, old_format=False, features=1) seems to create a layering image
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> rbd_inst.create(ioctx, 'myimage', size, old_format=False, features=2) seems to create a stripped image
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> Setting up “rbd default format =2” in ceph.conf and just using the following (without feature=x)
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> rbd_inst.create(ioctx, 'myimage', size) seems to create a layered + stripped image
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> If someone could point me to the documentation about those bitmasks (features), that would be great J I cannot find it.
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> Moreover, when my images are created this way (using rbd_inst.create with python), no way to snapshot an image !
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> #rbd snap create rbd/myimage@snap1
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> …. -1 librbd: failed to create snap id: (22) Invalid argument
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> Same thing with img.create_snap(snap) in python, snapshots are not created.
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> [@@ THALES GROUP INTERNAL @@]
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