Re: [one-users] Ceph snapshot
Excellent, thanks for the update...
On Fri Jan 16 2015 at 3:10:21 PM Fabian Zimmermann
wrote:
> Hi,
>
> answering myself:
>
> Am 16.01.15 um 13:59 schrieb Fabian Zimmermann:
> > Hi,
> >
> > Am 22.10.14 um 10:42 schrieb Ruben S. Montero:
> >> They should be supported for RBD 2 images, you may want to take a look
> to
> >> the actual cloning process in tm/ceph/clone
> > looks like /var/lib/one/remotes/tm/ceph/cpds is used in case of a hot
> > hdd-snapshot.
> yes, because ceph would block the deletion of the source-image until the
> new image is flatten and all snapshots are removed.
> > Should one use this script to create a hot snapshot?
> >
> > If yes, is it a good idea to reuse the
> >
> > if RBD_FORMAT=2
> > then
> >clone
> > else
> > copy
> >
> > system of tm/ceph/clone in tm/ceph/cpds or may this lead to other
> problems?
> Already asked at ceph-mailinglist if "rbd cp" is doing an internal
> snapshot to protect consistency of data. If not a "snap, protect,
> flatten, unprotect, rm" would be done with the following patch:
>
> --
> --- cpds.orig2015-01-16 14:09:10.116016425 +0100
> +++ cpds2015-01-16 15:00:26.666220420 +0100
> @@ -1,5 +1,7 @@
> #!/bin/bash
>
> +echo $* > /tmp/$$
> +
> #
> --
> #
> # Copyright 2002-2014, OpenNebula Project (OpenNebula.org), C12G
> Labs#
> #
> #
> @@ -80,8 +82,27 @@
> RBD="$RBD --id ${CEPH_USER}"
> fi
>
> +RBD_SNAP="cpds-${VM_ID}-${DISK_ID}-$( date +%s )"
> +
> +CP_CMD=$(
> +cat < +set -e
> +
> +RBD_FORMAT=\$($RBD info $RBD_DST | sed -n 's/.*format: // p')
> +if [ "\$RBD_FORMAT" = "2" ]; then
> +$RBD snap create "$RBD_DST@$RBD_SNAP"
> +$RBD snap protect "$RBD_DST@$RBD_SNAP"
> +$RBD clone "$RBD_DST@$RBD_SNAP" $DST
> +$RBD flatten $DST
> +$RBD snap unprotect "$RBD_DST@$RBD_SNAP"
> +$RBD snap rm "$RBD_DST@$RBD_SNAP"
> +else
> +$RBD copy $RBD_DST $DST
> +fi
> +EOF
> +)
>
> -ssh_exec_and_log "$SRC_HOST" "$RBD copy $RBD_DST $DST" \
> +ssh_exec_and_log "$SRC_HOST" "$CP_CMD" \
> "Error cloning $RBD_DST to $DST in $SRC_HOST"
>
> exit 0
> --
>
> I will create a feature-request if "rbd cp" isn't using an internal
> snapshot.
>
> Fabian
>
>
___
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Re: [one-users] Ceph snapshot
Hi,
answering myself:
Am 16.01.15 um 13:59 schrieb Fabian Zimmermann:
> Hi,
>
> Am 22.10.14 um 10:42 schrieb Ruben S. Montero:
>> They should be supported for RBD 2 images, you may want to take a look to
>> the actual cloning process in tm/ceph/clone
> looks like /var/lib/one/remotes/tm/ceph/cpds is used in case of a hot
> hdd-snapshot.
yes, because ceph would block the deletion of the source-image until the
new image is flatten and all snapshots are removed.
> Should one use this script to create a hot snapshot?
>
> If yes, is it a good idea to reuse the
>
> if RBD_FORMAT=2
> then
>clone
> else
> copy
>
> system of tm/ceph/clone in tm/ceph/cpds or may this lead to other problems?
Already asked at ceph-mailinglist if "rbd cp" is doing an internal
snapshot to protect consistency of data. If not a "snap, protect,
flatten, unprotect, rm" would be done with the following patch:
--
--- cpds.orig2015-01-16 14:09:10.116016425 +0100
+++ cpds2015-01-16 15:00:26.666220420 +0100
@@ -1,5 +1,7 @@
#!/bin/bash
+echo $* > /tmp/$$
+
#
-- #
# Copyright 2002-2014, OpenNebula Project (OpenNebula.org), C12G
Labs#
#
#
@@ -80,8 +82,27 @@
RBD="$RBD --id ${CEPH_USER}"
fi
+RBD_SNAP="cpds-${VM_ID}-${DISK_ID}-$( date +%s )"
+
+CP_CMD=$(
+cat
Re: [one-users] Ceph snapshot
Hi, Am 22.10.14 um 10:42 schrieb Ruben S. Montero: > They should be supported for RBD 2 images, you may want to take a look to > the actual cloning process in tm/ceph/clone looks like /var/lib/one/remotes/tm/ceph/cpds is used in case of a hot hdd-snapshot. Here my datastore-template -- DATASTORE 100 INFORMATION ID : 100 NAME : ceph-one USER : oneadmin GROUP : oneadmin CLUSTER: - TYPE : IMAGE DS_MAD : ceph TM_MAD : ceph BASE PATH : /var/lib/one//datastores/100 DISK_TYPE : RBD DATASTORE CAPACITY TOTAL: : 9.8T FREE: : 9.7T USED: : 118.8G LIMIT: : - PERMISSIONS OWNER : um- GROUP : u-- OTHER : --- DATASTORE TEMPLATE BASE_PATH="/var/lib/one//datastores/" BRIDGE_LIST="virt17 virt18" CEPH_HOST="10.0.29.0 10.0.29.1 10.0.29.2" CEPH_SECRET="x-x-x-x-x" CEPH_USER="libvirt" CLONE_TARGET="SELF" DISK_TYPE="RBD" DS_MAD="ceph" LN_TARGET="NONE" POOL_NAME="one" RBD_FORMAT="2" TM_MAD="ceph" TYPE="IMAGE_DS" -- Should one use this script to create a hot snapshot? If yes, is it a good idea to reuse the if RBD_FORMAT=2 then clone else copy system of tm/ceph/clone in tm/ceph/cpds or may this lead to other problems? Thanks, Fabian ___ Users mailing list Users@lists.opennebula.org http://lists.opennebula.org/listinfo.cgi/users-opennebula.org
Re: [one-users] Ceph snapshot
They should be supported for RBD 2 images, you may want to take a look to the actual cloning process in tm/ceph/clone Cheers Ruben On Wed, Oct 22, 2014 at 10:32 AM, Johan Kooijman wrote: > Hi all, > > I'm running ONE 4.8 on a Ceph datastore. All works fine, but when I create > a snapshot of a VM, it looks like it does a fat snapshot, instead of using > Ceph's copy-on-write snapshots. Is there some way I can configure ONE to > use the CoW? > > -- > Met vriendelijke groeten / With kind regards, > Johan Kooijman > > ___ > Users mailing list > Users@lists.opennebula.org > http://lists.opennebula.org/listinfo.cgi/users-opennebula.org > > -- Ruben S. Montero, PhD Project co-Lead and Chief Architect OpenNebula - Flexible Enterprise Cloud Made Simple www.OpenNebula.org | rsmont...@opennebula.org | @OpenNebula ___ Users mailing list Users@lists.opennebula.org http://lists.opennebula.org/listinfo.cgi/users-opennebula.org
[one-users] Ceph snapshot
Hi all, I'm running ONE 4.8 on a Ceph datastore. All works fine, but when I create a snapshot of a VM, it looks like it does a fat snapshot, instead of using Ceph's copy-on-write snapshots. Is there some way I can configure ONE to use the CoW? -- Met vriendelijke groeten / With kind regards, Johan Kooijman ___ Users mailing list Users@lists.opennebula.org http://lists.opennebula.org/listinfo.cgi/users-opennebula.org
