Re: how to restore snapshot LV's

[Mohammed Rafi K C <rkavunga@xxxxxxxxxx>]

On 05/27/2017 09:22 AM, WoongHee Han wrote:

Ih, i'm sorry for my late reply

I've tried to solve it using your answer. It worked as well thanks. it means the snapshot was activated.

and then i was restore the snapshot.

but, after i restored the snapshot ,there was nothing  in the volume(like files) 

can't it recover automatically?

I remember you were saying that you had reconfigured the vg's. Did you had mount for the snapshot brick path active ?

Rafi KC

Thank you agin for your answer.

Best regards

2017-05-19 15:34 GMT+09:00 Mohammed Rafi K C <rkavunga@xxxxxxxxxx>:

I do not know how you ended up in this state. This usually happens when there is a commit failure. To recover from this state you can change the value of "status" from

the path /var/lib/glusterd/snaps/<snapname>/<snapuid>/info . From this file change the status to 0 in nodes where the values are one. Then restart glusterd on those node where we changed manually.

Then try to activate it.

Regards

Rafi KC

On 05/18/2017 09:38 AM, Pranith Kumar Karampuri wrote:

+Rafi, +Raghavendra Bhat

On Tue, May 16, 2017 at 11:55 AM, WoongHee Han <polishedwh@xxxxxxxxx> wrote:

Hi, all!

I erased the VG having snapshot LV related to gluster volumes

and then, I tried to restore volume;

1. vgcreate vg_cluster /dev/sdb

2. lvcreate --size=10G --type=thin-pool -n tp_cluster vg_cluster

3. lvcreate -V 5G --thinpool vg_cluster/tp_cluster -n test_vol vg_cluster

4. gluster v stop test_vol

5. getfattr -n trusted.glusterfs.volume-id /volume/test_vol ( in other node)

6. setfattr -n trusted.glusterfs.volume-id -v  0sKtUJWIIpTeKWZx+S5PyXtQ== /volume/test_vol (already mounted)

7. gluster v start test_vol

8. restart glusterd

9. lvcreate -s vg_cluster/test_vol --setactivationskip=n --name 6564c50651484d09a36b912962c573df_0

10. lvcreate -s vg_cluster/test_vol --setactivationskip=n --name ee8c32a1941e4aba91feab21fbcb3c6c_0

11. lvcreate -s vg_cluster/test_vol --setactivationskip=n --name bf93dc34233646128f0c5f84c3ac1f83_0 

12. reboot

It works, but bricks for snapshot is not working.

------------------------------------------------------------------------------------------------------------------------------------------

~]# glsuter snpshot status

Brick Path        :   192.225.3.35:/var/run/gluster/snaps/bf93dc34233646128f0c5f84c3ac1f83/brick1

Volume Group      :   vg_cluster

Brick Running     :   No

Brick PID         :   N/A

Data Percentage   :   0.22

LV Size           :   5.00g

Brick Path        :   192.225.3.36:/var/run/gluster/snaps/bf93dc34233646128f0c5f84c3ac1f83/brick2

Volume Group      :   vg_cluster

Brick Running     :   No

Brick PID         :   N/A

Data Percentage   :   0.22

LV Size           :   5.00g

Brick Path        :   192.225.3.37:/var/run/gluster/snaps/bf93dc34233646128f0c5f84c3ac1f83/brick3

Volume Group      :   vg_cluster

Brick Running     :   No

Brick PID         :   N/A

Data Percentage   :   0.22

LV Size           :   5.00g

Brick Path        :   192.225.3.38:/var/run/gluster/snaps/bf93dc34233646128f0c5f84c3ac1f83/brick4

Volume Group      :   vg_cluster

Brick Running     :   Tes

Brick PID         :   N/A

Data Percentage   :   0.22

LV Size           :   5.00g

~]# gluster snapshot deactivate t3_GMT-2017.05.15-08.01.37

Deactivating snap will make its data inaccessible. Do you want to continue? (y/n) y

snapshot deactivate: failed: Pre Validation failed on 192.225.3.36. Snapshot t3_GMT-2017.05.15-08.01.37 is already deactivated.

Snapshot command failed

~]# gluster snapshot activate t3_GMT-2017.05.15-08.01.37

snapshot activate: failed: Snapshot t3_GMT-2017.05.15-08.01.37 is already activated

------------------------------------------------------------------------------------------------------------------------------------------

how to  restore snapshot LV's ?

my nodes consist of four nodes and  distributed, replicated (2x2)

thank you.

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--

Pranith

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