On 10/17/2017 03:45 PM, Alexander 'Leo' Bergolth wrote: > I just tested lv activation with a degraded raid1 thin pool. > Unfortunately it looks like activation mode=degraded only works for > plain raid1 lvs. If you add a thin pool, lvm won't activate it in > degraded mode. (Unless you specify --activationmode partial, which is > IMHO rather dangerous.) Unfortunately I cannot even replace a faulty PV if a thin pool is present. lvm thinks that the thin pool is a partial (not just degraded) LV, so removing the missing PV would also remove the thin pool! (see below) Is there any way to work around this problem? Cheers, --leo P.S.: I filed a bugreport for this: https://bugzilla.redhat.com/show_bug.cgi?id=1504044 -------------------- 8< -------------------- # pvcreate /dev/vdb Physical volume "/dev/vdb" successfully created. # pvcreate /dev/vdc Physical volume "/dev/vdc" successfully created. # vgcreate vg_test /dev/vdb /dev/vdc Volume group "vg_test" successfully created # lvcreate --type raid1 -m 1 -n thinmeta -L100m vg_test /dev/vdb /dev/vdc Logical volume "thinmeta" created. # lvcreate --type raid1 -m 1 -n Thin -L2g vg_test /dev/vdb /dev/vdc Logical volume "Thin" created. # lvconvert -y --type thin-pool --poolmetadata vg_test/thinmeta vg_test/Thin Thin pool volume with chunk size 64.00 KiB can address at most 15.81 TiB of data. WARNING: Converting logical volume vg_test/Thin and vg_test/thinmeta to thin pool's data and metadata volumes with metadata wiping. THIS WILL DESTROY CONTENT OF LOGICAL VOLUME (filesystem etc.) Converted vg_test/Thin_tdata to thin pool. # vgchange -a n vg_test 0 logical volume(s) in volume group "vg_test" now active ### add global_filter = [ "r|^/dev/vdc$|" ] to lvm.conf # systemctl restart lvm2-lvmetad.service # pvscan --cache # pvs WARNING: Device for PV na0HS1-ZcQt-bnt0-tFfB-Zl20-irIg-FffGxH not found or rejected by a filter. PV VG Fmt Attr PSize PFree /dev/vda2 vg_sys lvm2 a-- <12.00g <2.00g /dev/vdb vg_test lvm2 a-- <12.00g 9.79g [unknown] vg_test lvm2 a-m <12.00g 9.89g # vgchange -a y vg_test WARNING: Device for PV na0HS1-ZcQt-bnt0-tFfB-Zl20-irIg-FffGxH not found or rejected by a filter. Refusing activation of partial LV vg_test/Thin. Use '--activationmode partial' to override. 0 logical volume(s) in volume group "vg_test" now active # vgchange -a y --activationmode=partial vg_test PARTIAL MODE. Incomplete logical volumes will be processed. WARNING: Device for PV na0HS1-ZcQt-bnt0-tFfB-Zl20-irIg-FffGxH not found or rejected by a filter. 1 logical volume(s) in volume group "vg_test" now active ### removing the missing PV would also remove my thin pool! # vgreduce --removemissing vg_test WARNING: Device for PV na0HS1-ZcQt-bnt0-tFfB-Zl20-irIg-FffGxH not found or rejected by a filter. WARNING: Partial LV Thin needs to be repaired or removed. WARNING: Partial LV Thin_tmeta needs to be repaired or removed. WARNING: Partial LV Thin_tdata needs to be repaired or removed. WARNING: Partial LV Thin_tmeta_rimage_1 needs to be repaired or removed. WARNING: Partial LV Thin_tmeta_rmeta_1 needs to be repaired or removed. WARNING: Partial LV Thin_tdata_rimage_1 needs to be repaired or removed. WARNING: Partial LV Thin_tdata_rmeta_1 needs to be repaired or removed. There are still partial LVs in VG vg_test. To remove them unconditionally use: vgreduce --removemissing --force. WARNING: Proceeding to remove empty missing PVs. -------------------- 8< -------------------- > > Is this the intended behavior? > > -------------------- 8< -------------------- > # lvcreate --type raid1 -m 1 -n thinmeta -L100m vg1 /dev/sda2 /dev/sdb2 > Logical volume "thinmeta" created. > # lvcreate --type raid1 -m 1 -n Thin -L2g vg1 /dev/sda2 /dev/sdb2 > Logical volume "Thin" created. > # lvconvert -y --type thin-pool --poolmetadata vg1/thinmeta vg1/Thin > Thin pool volume with chunk size 64.00 KiB can address at most 15.81 TiB of data. > WARNING: Converting logical volume vg1/Thin and vg1/thinmeta to thin pool's data and metadata volumes with metadata wiping. > THIS WILL DESTROY CONTENT OF LOGICAL VOLUME (filesystem etc.) > Converted vg1/Thin_tdata to thin pool. > > # vgchange -a n vg1 > 0 logical volume(s) in volume group "vg1" now active > > ### filter one leg of the raid: global_filter = [ "r|^/dev/sdb2|" ] > # systemctl restart lvm2-lvmetad.service > # pvscan --cache > > # vgchange -a y > WARNING: Device for PV WzDZS1-Hj9B-RZCa-uhOc-pY9L-1rLN-GB5Zs1 not found or rejected by a filter. > Refusing activation of partial LV vg1/Thin. Use '--activationmode partial' to override. > 0 logical volume(s) in volume group "vg1" now active > -------------------- 8< -------------------- > > (--activationmode partial works) > > I am using lvm2-2.02.171-8.el7.x86_64. > > Cheers, > --leo > -- e-mail ::: Leo.Bergolth (at) wu.ac.at fax ::: +43-1-31336-906050 location ::: IT-Services | Vienna University of Economics | Austria _______________________________________________ linux-lvm mailing list linux-lvm@redhat.com https://www.redhat.com/mailman/listinfo/linux-lvm read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/
