Re: Ceph OSD crash starting up

[David Turner <drakonstein@xxxxxxxxx>]

Your weights should more closely represent the size of the OSDs.  OSD3 and OSD6 are weighted properly, but your other 3 OSDs have the same weight even though OSD0 is twice the size of OSD2 and OSD4.

Your OSD weights is what I thought you were referring to when you said you set the crush map to 1.  At some point it does look like you set all of your OSD weights to 1, which would apply to OSD1.  If the OSD was too small for that much data, it would have filled up and be too full to start.  Can you mount that disk and see how much free space is on it?

Just so you understand what that weight is, it is how much data the cluster is going to put on it.  The default is for the weight to be the size of the OSD in TiB (1024 based instead of TB which is 1000).  If you set the weight of a 1TB disk and a 4TB disk both to 1, then the cluster will try and give them the same amount of data.  If you set the 4TB disk to a weight of 4, then the cluster will try to give it 4x more data than the 1TB drive (usually what you want).

In your case, your 926G OSD0 has a weight of 1 and your 460G OSD2 has a weight of 1 so the cluster thinks they should each receive the same amount of data (which it did, they each have ~275GB of data).  OSD3 has a weight of 1.36380 (its size in TiB) and OSD6 has a weight of 0.90919 and they have basically the same %used space (17%) as opposed to the same amount of data because the weight is based on their size.

As long as you had enough replicas of your data in the cluster for it to recover from you removing OSD1 such that your cluster is health_ok without any missing objects, then there is nothing that you need off of OSD1 and ceph recovered from the lost disk successfully.

On Thu, Sep 14, 2017 at 4:39 PM Gonzalo Aguilar Delgado <gaguilar@xxxxxxxxxxxxxxxxxx> wrote:

Hello,

I was on a old version of ceph. And it showed a warning saying:

crush map has straw_calc_version=0

I rode that adjusting it will only rebalance all so admin should select when to do it. So I went straigth and ran:

ceph osd crush tunables optimal

It rebalanced as it said but then I started to have lots of pg wrong. I discovered that it was because my OSD1. I thought it was disk faillure so I added a new OSD6 and system started to rebalance. Anyway OSD was not starting.

I thought to wipe it all. But I preferred to leave disk as it was, and journal intact, in case I can recover and get data from it. (See mail: Scrub failing all the time, new inconsistencies keep appearing).

So here's the information. But it has OSD1 replaced by OSD3, sorry.

ID WEIGHT  REWEIGHT SIZE  USE   AVAIL %USE  VAR  PGS
 0 1.00000  1.00000  926G  271G  654G 29.34 1.10 369
 2 1.00000  1.00000  460G  284G  176G 61.67 2.32 395
 4 1.00000  1.00000  465G  151G  313G 32.64 1.23 214
 3 1.36380  1.00000 1396G  239G 1157G 17.13 0.64 340
 6 0.90919  1.00000  931G  164G  766G 17.70 0.67 210
              TOTAL 4179G 1111G 3067G 26.60         
MIN/MAX VAR: 0.64/2.32  STDDEV: 16.99

As I said I still have OSD1 intact so I can do whatever you need except readding to the cluster. Since I don't know what It will do, maybe cause havok.
Best regards,

On 14/09/17 17:12, David Turner wrote:

What do you mean by "updated crush map to 1"?  Can you please provide a copy of your crush map and `ceph osd df`?

On Wed, Sep 13, 2017 at 6:39 AM Gonzalo Aguilar Delgado <gaguilar@xxxxxxxxxxxxxxxxxx> wrote:

Hi,

I'recently updated crush map to 1 and did all relocation of the pgs. At the end I found that one of the OSD is not starting.

This is what it shows:

2017-09-13 10:37:34.287248 7f49cbe12700 -1 *** Caught signal (Aborted) **
 in thread 7f49cbe12700 thread_name:filestore_sync

 ceph version 10.2.7 (50e863e0f4bc8f4b9e31156de690d765af245185)
 1: (()+0x9616ee) [0xa93c6ef6ee]
 2: (()+0x11390) [0x7f49d9937390]
 3: (gsignal()+0x38) [0x7f49d78d3428]
 4: (abort()+0x16a) [0x7f49d78d502a]
 5: (ceph::__ceph_assert_fail(char const*, char const*, int, char const*)+0x26b) [0xa93c7ef43b]
 6: (FileStore::sync_entry()+0x2bbb) [0xa93c47fcbb]
 7: (FileStore::SyncThread::entry()+0xd) [0xa93c4adcdd]
 8: (()+0x76ba) [0x7f49d992d6ba]
 9: (clone()+0x6d) [0x7f49d79a53dd]
 NOTE: a copy of the executable, or `objdump -rdS <executable>` is needed to interpret this.

--- begin dump of recent events ---
    -3> 2017-09-13 10:37:34.253808 7f49dac6e8c0  5 osd.1 pg_epoch: 6293 pg[10.8c( v 6220'575937 (4942'572901,6220'575937] local-les=6235 n=282 ec=419 les/c/f 6235/6235/0 6293/6293/6290) [1,2]/[2] r=-1 lpr=0 pi=6234-6292/24 crt=6220'575937 lcod 0'0 inactive NOTIFY NIBBLEWISE] exit Initial 0.029683 0 0.000000
    -2> 2017-09-13 10:37:34.253848 7f49dac6e8c0  5 osd.1 pg_epoch: 6293 pg[10.8c( v 6220'575937 (4942'572901,6220'575937] local-les=6235 n=282 ec=419 les/c/f 6235/6235/0 6293/6293/6290) [1,2]/[2] r=-1 lpr=0 pi=6234-6292/24 crt=6220'575937 lcod 0'0 inactive NOTIFY NIBBLEWISE] enter Reset
    -1> 2017-09-13 10:37:34.255018 7f49dac6e8c0  5 osd.1 pg_epoch: 6293 pg[10.90(unlocked)] enter Initial
     0> 2017-09-13 10:37:34.287248 7f49cbe12700 -1 *** Caught signal (Aborted) **
 in thread 7f49cbe12700 thread_name:filestore_sync

 ceph version 10.2.7 (50e863e0f4bc8f4b9e31156de690d765af245185)
 1: (()+0x9616ee) [0xa93c6ef6ee]
 2: (()+0x11390) [0x7f49d9937390]
 3: (gsignal()+0x38) [0x7f49d78d3428]
 4: (abort()+0x16a) [0x7f49d78d502a]
 5: (ceph::__ceph_assert_fail(char const*, char const*, int, char const*)+0x26b) [0xa93c7ef43b]
 6: (FileStore::sync_entry()+0x2bbb) [0xa93c47fcbb]
 7: (FileStore::SyncThread::entry()+0xd) [0xa93c4adcdd]
 8: (()+0x76ba) [0x7f49d992d6ba]
 9: (clone()+0x6d) [0x7f49d79a53dd]
 NOTE: a copy of the executable, or `objdump -rdS <executable>` is needed to interpret this.

--- logging levels ---
   0/ 5 none
   0/ 1 lockdep
   0/ 1 context
   1/ 1 crush
   1/ 5 mds
   1/ 5 mds_balancer
   1/ 5 mds_locker
   1/ 5 mds_log
   1/ 5 mds_log_expire
   1/ 5 mds_migrator
   0/ 1 buffer
   0/ 1 timer
   0/ 1 filer
   0/ 1 striper
   0/ 1 objecter
   0/ 5 rados
   0/ 5 rbd
   0/ 5 rbd_mirror
   0/ 5 rbd_replay
   0/ 5 journaler
   0/ 5 objectcacher
   0/ 5 client
   0/ 5 osd
   0/ 5 optracker
   0/ 5 objclass
   1/ 3 filestore
   1/ 3 journal
   0/ 5 ms
   1/ 5 mon
   0/10 monc
   1/ 5 paxos
   0/ 5 tp
   1/ 5 auth
   1/ 5 crypto
   1/ 1 finisher
   1/ 5 heartbeatmap
   1/ 5 perfcounter
   1/ 5 rgw
   1/10 civetweb
   1/ 5 javaclient
   1/ 5 asok
   1/ 1 throttle
   0/ 0 refs
   1/ 5 xio
   1/ 5 compressor
   1/ 5 newstore
   1/ 5 bluestore
   1/ 5 bluefs
   1/ 3 bdev
   1/ 5 kstore
   4/ 5 rocksdb
   4/ 5 leveldb
   1/ 5 kinetic
   1/ 5 fuse
  -2/-2 (syslog threshold)
  -1/-1 (stderr threshold)
  max_recent     10000
  max_new         1000
  log_file /var/log/ceph/ceph-osd.1.log
--- end dump of recent events ---

Is there any way to recover it or should I open a bug?

Best regards

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