Bug 1462712
| Summary: | lvm2: can not set raid type to thin pool | ||
|---|---|---|---|
| Product: | Red Hat Enterprise Linux 7 | Reporter: | Bruno Goncalves <bgoncalv> |
| Component: | lvm2 | Assignee: | Zdenek Kabelac <zkabelac> |
| lvm2 sub component: | Thin Provisioning | QA Contact: | Bruno Goncalves <bgoncalv> |
| Status: | CLOSED ERRATA | Docs Contact: | |
| Severity: | medium | ||
| Priority: | medium | CC: | agk, cmarthal, heinzm, jbrassow, msnitzer, prajnoha, prockai, thornber, tlavigne, zkabelac |
| Version: | 7.4 | Keywords: | Regression |
| Target Milestone: | rc | ||
| Target Release: | --- | ||
| Hardware: | Unspecified | ||
| OS: | Unspecified | ||
| Whiteboard: | |||
| Fixed In Version: | lvm2-2.02.171-6.el7 | Doc Type: | If docs needed, set a value |
| Doc Text: | Story Points: | --- | |
| Clone Of: | Environment: | ||
| Last Closed: | 2017-08-01 21:54:18 UTC | Type: | Bug |
| Regression: | --- | Mount Type: | --- |
| Documentation: | --- | CRM: | |
| Verified Versions: | Category: | --- | |
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
| Cloudforms Team: | --- | Target Upstream Version: | |
| Embargoed: | |||
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Description
Bruno Goncalves
2017-06-19 11:45:00 UTC
I do not know how serious this is, but this works on RHEL-7.3 and also with RHEL-7.4 Snapshot#3 (kernel-3.10.0-675.el7, lvm2-2.02.171-2.el7) lvchange -an testvg/pool lvconvert --type raid1 --mirrors 3 --yes testvg/pool_tdata Logical volume testvg/pool_tdata successfully converted. Seems we are at Catch 22 now with Bug 1365286. And the only way forward is to fix original bug which resulted into hotfix actually disabling raids for thin-pool. Functionality restored with commit: https://www.redhat.com/archives/lvm-devel/2017-June/msg00069.html Now it should be again possible to change thin_pool _tdata & _tmeta to raid and back. Fix verified in the latest rpms, thus *reversing* behavior verified in bug 1365286. 3.10.0-685.el7.x86_64 lvm2-2.02.171-6.el7 BUILT: Wed Jun 21 09:35:03 CDT 2017 lvm2-libs-2.02.171-6.el7 BUILT: Wed Jun 21 09:35:03 CDT 2017 lvm2-cluster-2.02.171-6.el7 BUILT: Wed Jun 21 09:35:03 CDT 2017 device-mapper-1.02.140-6.el7 BUILT: Wed Jun 21 09:35:03 CDT 2017 device-mapper-libs-1.02.140-6.el7 BUILT: Wed Jun 21 09:35:03 CDT 2017 device-mapper-event-1.02.140-6.el7 BUILT: Wed Jun 21 09:35:03 CDT 2017 device-mapper-event-libs-1.02.140-6.el7 BUILT: Wed Jun 21 09:35:03 CDT 2017 device-mapper-persistent-data-0.7.0-0.1.rc6.el7 BUILT: Mon Mar 27 10:15:46 CDT 2017 [root@host-094 ~]# lvcreate -L4M --thin testvg/pool Using default stripesize 64.00 KiB. Thin pool volume with chunk size 64.00 KiB can address at most 15.81 TiB of data. Logical volume "pool" created. [root@host-094 ~]# lvchange -an testvg/pool [root@host-094 ~]# lvconvert --type raid1 --mirrors 3 --yes testvg/pool_tdata testvg/pool_tdata must be active to perform this operation. [root@host-094 ~]# lvchange -ay testvg/pool [root@host-094 ~]# lvconvert --type raid1 --mirrors 3 --yes testvg/pool_tdata Logical volume testvg/pool_tdata successfully converted. [root@host-094 ~]# lvs -a -o +devices LV VG Attr LSize Pool Origin Data% Meta% Cpy%Sync Devices [lvol0_pmspare] testvg ewi------- 4.00m /dev/sda1(0) pool testvg twi-a-tz-- 4.00m 0.00 0.88 pool_tdata(0) [pool_tdata] testvg rwi-aor--- 4.00m 100.00 pool_tdata_rimage_0(0),pool_tdata_rimage_1(0),pool_tdata_rimage_2(0),pool_tdata_rimage_3(0) [pool_tdata_rimage_0] testvg iwi-aor--- 4.00m /dev/sda1(1) [pool_tdata_rimage_1] testvg iwi-aor--- 4.00m /dev/sdb1(1) [pool_tdata_rimage_2] testvg iwi-aor--- 4.00m /dev/sdc1(1) [pool_tdata_rimage_3] testvg iwi-aor--- 4.00m /dev/sdd1(1) [pool_tdata_rmeta_0] testvg ewi-aor--- 4.00m /dev/sda1(2) [pool_tdata_rmeta_1] testvg ewi-aor--- 4.00m /dev/sdb1(0) [pool_tdata_rmeta_2] testvg ewi-aor--- 4.00m /dev/sdc1(0) [pool_tdata_rmeta_3] testvg ewi-aor--- 4.00m /dev/sdd1(0) [pool_tmeta] testvg ewi-ao---- 4.00m /dev/sdh1(0) Now there is a change on behavior when it is possible to change RAID type. On RHEL-7.3 the pool needed to be deactivate to perform lvconvert. Now the pool needs to be active. Is this correct? Active pool: # lvconvert --type raid1 --mirrors 3 --yes testvg/pool_tdata Logical volume testvg/pool_tdata successfully converted. Deactivated pool: # lvchange -an testvg/pool # lvconvert --type raid1 --mirrors 3 --yes testvg/pool_tdata testvg/pool_tdata must be active to perform this operation. Tested with lvm2-2.02.171-8.el7 couldn't hurt to have a release note about this, but this is a necessary change in behavior. We cannot change the behavior back without introducing worse problems - at least not until we have more complex operations to perform an up-convert. Since the problem described in this bug report should be resolved in a recent advisory, it has been closed with a resolution of ERRATA. For information on the advisory, and where to find the updated files, follow the link below. If the solution does not work for you, open a new bug report. https://access.redhat.com/errata/RHBA-2017:2222 |