Re: problem with degraded PG

[Luk <skidoo-wYtBgQxc//8@public.gmane.org>]

Hi,

here is the output:

ceph osd crush show-tunables
{
    "choose_local_tries": 0,
    "choose_local_fallback_tries": 0,
    "choose_total_tries": 100,
    "chooseleaf_descend_once": 1,
    "chooseleaf_vary_r": 1,
    "chooseleaf_stable": 0,
    "straw_calc_version": 1,
    "allowed_bucket_algs": 22,
    "profile": "unknown",
    "optimal_tunables": 0,
    "legacy_tunables": 0,
    "minimum_required_version": "hammer",
    "require_feature_tunables": 1,
    "require_feature_tunables2": 1,
    "has_v2_rules": 0,
    "require_feature_tunables3": 1,
    "has_v3_rules": 0,
    "has_v4_buckets": 1,
    "require_feature_tunables5": 0,
    "has_v5_rules": 0
}

[root@ceph-mon-01 ~]#

-- 
Regards
Lukasz

> Hi,
> This looks like a tunables issue.
> What is the output of `ceph osd crush show-tunables `

> -- Dan

> On Fri, Jun 14, 2019 at 11:19 AM Luk <skidoo-wYtBgQxc//8@public.gmane.org> wrote:
>>
>> Hello,
>>
>> Maybe  somone  was  fighting  with this kind of stuck in ceph already.
>> This  is  production  cluster,  can't/don't  want to make wrong steps,
>> please advice, what to do.
>>
>> After  changing  of  one failed disk (it was osd-7) on our cluster ceph
>> didn't recover to HEALTH_OK, it stopped in state:
>>
>> [root@ceph-mon-01 ~]# ceph -s
>>   cluster:
>>     id:     b6f23cff-7279-f4b0-ff91-21fadac95bb5
>>     health: HEALTH_WARN
>>             noout,noscrub,nodeep-scrub flag(s) set
>>             Degraded data redundancy: 24761/45994899 objects degraded (0.054%), 8 pgs degraded, 8 pgs undersized
>>
>>   services:
>>     mon:        3 daemons, quorum ceph-mon-01,ceph-mon-02,ceph-mon-03
>>     mgr:        ceph-mon-03(active), standbys: ceph-mon-02, ceph-mon-01
>>     osd:        144 osds: 144 up, 144 in
>>                 flags noout,noscrub,nodeep-scrub
>>     rbd-mirror: 3 daemons active
>>     rgw:        6 daemons active
>>
>>   data:
>>     pools:   18 pools, 2176 pgs
>>     objects: 15.33M objects, 49.3TiB
>>     usage:   151TiB used, 252TiB / 403TiB avail
>>     pgs:     24761/45994899 objects degraded (0.054%)
>>              2168 active+clean
>>              8    active+undersized+degraded
>>
>>   io:
>>     client:   435MiB/s rd, 415MiB/s wr, 7.94kop/s rd, 2.96kop/s wr
>>
>> Restart of OSD didn't helped, changing choose_total_tries from 50 to 100 didn't help.
>>
>> I checked one of degraded PG, 10.3c4
>>
>> [root@ceph-mon-01 ~]# ceph pg dump 2>&1 | grep -w 10.3c4
>> 10.3c4     3593                  0     3593         0       0 14769891858 10076    10076    active+undersized+degraded 2019-06-13 08:19:39.802219  37380'71900564 37380:119411139       [9,109]          9       [9,109]              9  33550'69130424 2019-06-08 02:28:40.508790  33550'69130424 2019-06-08 02:28:40.508790            18
>>
>>
>> [root@ceph-mon-01 ~]# ceph pg 10.3c4 query | jq '.["peer_info"][] | {peer: .peer, last_update:.last_update}'
>> {
>>   "peer": "0",
>>   "last_update": "36847'71412720"
>> }
>> {
>>   "peer": "109",
>>   "last_update": "37380'71900570"
>> }
>> {
>>   "peer": "117",
>>   "last_update": "0'0"
>> }
>>
>>
>> [root@ceph-mon-01 ~]#
>> I have checked space taken for this PG on storage nodes:
>> here is how to check where is particular OSD (on which physical storage node):
>> [root@ceph-mon-01 ~]# ceph osd status 2>&1 | grep " 9 "
>> |  9  |   stor-a02  | 2063G | 5386G |   52   |  1347k  |   53   |   292k  | exists,up |
>> [root@ceph-mon-01 ~]# ceph osd status 2>&1 | grep " 109 "
>> | 109 |   stor-a01  | 1285G | 4301G |    5   |  31.0k  |    6   |  59.2k  | exists,up |
>> [root@ceph-mon-01 ~]# watch ceph -s
>> [root@ceph-mon-01 ~]# ceph osd status 2>&1 | grep " 117 "
>> | 117 |   stor-b02  | 1334G | 4252G |   54   |  1216k  |   13   |  27.4k  | exists,up |
>> [root@ceph-mon-01 ~]# ceph osd status 2>&1 | grep " 0 "
>> |  0  |   stor-a01  | 2156G | 5293G |   58   |   387k  |   29   |  30.7k  | exists,up |
>> [root@ceph-mon-01 ~]#
>> and checking sizes on servers:
>> stor-a01 (this PG shouldn't be on the same host):
>> [root@stor-a01 /var/lib/ceph/osd/ceph-0/current]# du -sh 10.3c4_*
>> 2.4G    10.3c4_head
>> 0       10.3c4_TEMP
>> [root@stor-a01 /var/lib/ceph/osd/ceph-109/current]# du -sh 10.3c4_*
>> 14G     10.3c4_head
>> 0       10.3c4_TEMP
>> [root@stor-a01 /var/lib/ceph/osd/ceph-109/current]#
>> stor-a02:
>> [root@stor-a02 /var/lib/ceph/osd/ceph-9/current]# du -sh 10.3c4_*
>> 14G     10.3c4_head
>> 0       10.3c4_TEMP
>> [root@stor-a02 /var/lib/ceph/osd/ceph-9/current]#
>> stor-b02:
>> [root@stor-b02 /var/lib/ceph/osd/ceph-117/current]# du -sh 10.3c4_*
>> zsh: no matches found: 10.3c4_*
>>
>> information about ceph:
>> [root@ceph-mon-01 ~]# ceph versions
>> {
>>     "mon": {
>>         "ceph version 12.2.9 (9e300932ef8a8916fb3fda78c58691a6ab0f4217) luminous (stable)": 3
>>     },
>>     "mgr": {
>>         "ceph version 12.2.9 (9e300932ef8a8916fb3fda78c58691a6ab0f4217) luminous (stable)": 3
>>     },
>>     "osd": {
>>         "ceph version 12.2.9 (9e300932ef8a8916fb3fda78c58691a6ab0f4217) luminous (stable)": 144
>>     },
>>     "mds": {},
>>     "rbd-mirror": {
>>         "ceph version 12.2.9 (9e300932ef8a8916fb3fda78c58691a6ab0f4217) luminous (stable)": 3
>>     },
>>     "rgw": {
>>         "ceph version 12.2.9 (9e300932ef8a8916fb3fda78c58691a6ab0f4217) luminous (stable)": 6
>>     },
>>     "overall": {
>>         "ceph version 12.2.9 (9e300932ef8a8916fb3fda78c58691a6ab0f4217) luminous (stable)": 159
>>     }
>> }
>>
>> crushmap: https://pastebin.com/cpC2WmyS
>> ceph osd tree: https://pastebin.com/XvZ2cNZZ
>>
>> I'm  cross-posting this do devel because maybe there is some known bug
>> in  this  particular  version  of  ceph,  and  You  could  point  some
>> directions to fix this problem.
>>
>> --
>> Regards
>> Lukasz
>>



-- 
Pozdrowienia,
 Luk