I also tried ceph pg query, but it gave no helpful recommendations for any
of the stuck pgs.


On Tue, Jul 18, 2017 at 7:45 PM Roger Brown <[email protected]> wrote:

> Problem:
> I have some pgs with only two OSDs instead of 3 like all the other pgs
> have. This is causing active+undersized+degraded status.
>
> History:
> 1. I started with 3 hosts, each with 1 OSD process (min_size 2) for a 1TB
> drive.
> 2. Added 3 more hosts, each with 1 OSD process for a 10TB drive.
> 3. Removed the original 3 1TB OSD hosts from the osd tree (reweight 0,
> wait, stop, remove, del osd&host, rm).
> 4. The last OSD to be removed would never return to active+clean after
> reweight 0. It returned undersized instead, but I went on with removal
> anyway, leaving me stuck with 5 undersized pgs.
>
> Things tried that didn't help:
> * give it time to go away on its own
> * Replace replicated default.rgw.buckets.data pool with erasure-code 2+1
> version.
> * ceph osd lost 1 (and 2)
> * ceph pg repair (pgs from dump_stuck)
> * googled 'ceph pg undersized' and similar searches for help.
>
> Current status:
> $ ceph osd tree
> ID WEIGHT   TYPE NAME     UP/DOWN REWEIGHT PRIMARY-AFFINITY
> -1 19.19119 root default
> -5  1.00000     host osd1
>  3  1.00000         osd.3      up  1.00000          1.00000
> -6  9.09560     host osd2
>  4  9.09560         osd.4      up  1.00000          1.00000
> -2  9.09560     host osd3
>  0  9.09560         osd.0      up  1.00000          1.00000
> $ ceph pg dump_stuck
> ok
> PG_STAT STATE                      UP    UP_PRIMARY ACTING ACTING_PRIMARY
> 88.3    active+undersized+degraded [4,0]          4  [4,0]              4
> 97.3    active+undersized+degraded [4,0]          4  [4,0]              4
> 85.6    active+undersized+degraded [4,0]          4  [4,0]              4
> 87.5    active+undersized+degraded [0,4]          0  [0,4]              0
> 70.0    active+undersized+degraded [0,4]          0  [0,4]              0
> $ ceph osd pool ls detail
> pool 70 'default.rgw.rgw.gc' replicated size 3 min_size 2 crush_rule 0
> object_hash rjenkins pg_num 4 pgp_num 4 last_change 548 flags hashpspool
> stripe_width 0
> pool 83 'default.rgw.buckets.non-ec' replicated size 3 min_size 2
> crush_rule 0 object_hash rjenkins pg_num 8 pgp_num 8 last_change 576 owner
> 18446744073709551615 flags hashpspool stripe_width 0
> pool 85 'default.rgw.control' replicated size 3 min_size 2 crush_rule 0
> object_hash rjenkins pg_num 8 pgp_num 8 last_change 652 flags hashpspool
> stripe_width 0
> pool 86 'default.rgw.data.root' replicated size 3 min_size 2 crush_rule 0
> object_hash rjenkins pg_num 8 pgp_num 8 last_change 653 flags hashpspool
> stripe_width 0
> pool 87 'default.rgw.gc' replicated size 3 min_size 2 crush_rule 0
> object_hash rjenkins pg_num 8 pgp_num 8 last_change 654 flags hashpspool
> stripe_width 0
> pool 88 'default.rgw.lc' replicated size 3 min_size 2 crush_rule 0
> object_hash rjenkins pg_num 8 pgp_num 8 last_change 600 flags hashpspool
> stripe_width 0
> pool 89 'default.rgw.log' replicated size 3 min_size 2 crush_rule 0
> object_hash rjenkins pg_num 8 pgp_num 8 last_change 655 flags hashpspool
> stripe_width 0
> pool 90 'default.rgw.users.uid' replicated size 3 min_size 2 crush_rule 0
> object_hash rjenkins pg_num 8 pgp_num 8 last_change 662 flags hashpspool
> stripe_width 0
> pool 91 'default.rgw.users.email' replicated size 3 min_size 2 crush_rule
> 0 object_hash rjenkins pg_num 8 pgp_num 8 last_change 660 flags hashpspool
> stripe_width 0
> pool 92 'default.rgw.users.keys' replicated size 3 min_size 2 crush_rule 0
> object_hash rjenkins pg_num 8 pgp_num 8 last_change 659 flags hashpspool
> stripe_width 0
> pool 93 'default.rgw.buckets.index' replicated size 3 min_size 2
> crush_rule 0 object_hash rjenkins pg_num 8 pgp_num 8 last_change 664 flags
> hashpspool stripe_width 0
> pool 95 'default.rgw.intent-log' replicated size 3 min_size 2 crush_rule 0
> object_hash rjenkins pg_num 4 pgp_num 4 last_change 656 flags hashpspool
> stripe_width 0
> pool 96 'default.rgw.meta' replicated size 3 min_size 2 crush_rule 0
> object_hash rjenkins pg_num 4 pgp_num 4 last_change 657 flags hashpspool
> stripe_width 0
> pool 97 'default.rgw.usage' replicated size 3 min_size 2 crush_rule 0
> object_hash rjenkins pg_num 4 pgp_num 4 last_change 658 flags hashpspool
> stripe_width 0
> pool 98 'default.rgw.users.swift' replicated size 3 min_size 2 crush_rule
> 0 object_hash rjenkins pg_num 4 pgp_num 4 last_change 661 flags hashpspool
> stripe_width 0
> pool 99 'default.rgw.buckets.extra' replicated size 3 min_size 2
> crush_rule 0 object_hash rjenkins pg_num 4 pgp_num 4 last_change 663 flags
> hashpspool stripe_width 0
> pool 100 '.rgw.root' replicated size 3 min_size 2 crush_rule 0 object_hash
> rjenkins pg_num 4 pgp_num 4 last_change 651 flags hashpspool stripe_width 0
> pool 101 'default.rgw.reshard' replicated size 3 min_size 2 crush_rule 0
> object_hash rjenkins pg_num 8 pgp_num 8 last_change 1529 owner
> 18446744073709551615 flags hashpspool stripe_width 0
> pool 103 'default.rgw.buckets.data' erasure size 3 min_size 2 crush_rule 1
> object_hash rjenkins pg_num 256 pgp_num 256 last_change 2106 flags
> hashpspool stripe_width 8192
>
> I'll keep on googling, but I'm open to advice!
>
> Thank you,
>
> Roger
>
>
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