Re: how to restore snapshot LV's

Pranith Kumar Karampuri <pkarampu@xxxxxxxxxx> · Thu, 18 May 2017 09:38:33 +0530

+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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