Hi David,
Thanks for the reply, it's appreciated.On 2 May 2017 at 17:00, David Zafman <dzafman@xxxxxxxxxx> wrote:
James,
You have an omap corruption. It is likely caused by a bug which has already been identified. A fix for that problem is available but it is still pending backport for the next Jewel point release. All 4 of your replicas have different "omap_digest" values.
Instead of the xattrs the ceph-osdomap-tool --command dump-objects-with-keys output from OSDs 3, 10, 11, 23 would be interesting to compare.
***WARNING*** Please backup your data before doing any repair attempts.
If you can upgrade to Kraken v11.2.0, it will auto repair the omaps on ceph-osd start up. It will likely still require a ceph pg repair to make the 4 replicas consistent with each other. The final result may be the reappearance of removed MDS files in the directory.
If you can recover the data, you could remove the directory entirely and rebuild it. The original bug was triggered during omap deletion typically in a large directory which corresponds to an individual unlink in cephfs.
If you can build a branch in github to get the newer ceph-osdomap-tool you could try to use it to repair the omaps.
David
On 5/2/17 5:05 AM, James Eckersall wrote:
Hi, I'm having some issues with a ceph cluster. It's an 8 node cluster rnning Jewel ceph-10.2.7-0.el7.x86_64 on CentOS 7. This cluster provides RBDs and a CephFS filesystem to a number of clients. ceph health detail is showing the following errors: pg 2.9 is active+clean+inconsistent, acting [3,10,11,23] 1 scrub errors mds0: Metadata damage detected The pg 2.9 is in the cephfs_metadata pool (id 2). I've looked at the OSD logs for OSD 3, which is the primary for this PG, but the only thing that appears relating to this PG is the following: log_channel(cluster) log [ERR] : 2.9 deep-scrub 1 errors After initiating a ceph pg repair 2.9, I see the following in the primary OSD log: log_channel(cluster) log [ERR] : 2.9 repair 1 errors, 0 fixed log_channel(cluster) log [ERR] : 2.9 deep-scrub 1 errors I found the below command in a previous ceph-users post. Running this returns the following: # rados list-inconsistent-obj 2.9 {"epoch":23738,"inconsistents":[{"object":{"name":" 10000411194.00000000","nspace" :"","locator":"","snap":"head" ,"version":14737091},"errors": ["omap_digest_mismatch"]," union_shard_errors":[]," selected_object_info":"2: 9758b358:::10000411194. 00000000:head(33456'14737091 mds.0.214448:248532 dirty|omap|data_digest s 0 uv 14737091 dd ffffffff)","shards":[{"osd":3, "errors":[],"size":0,"omap_ digest":"0x6748eef3","data_ digest":"0xffffffff"},{"osd": 10,"errors":[],"size":0,"omap_ digest":"0xa791d5a4","data_ digest":"0xffffffff"},{"osd": 11,"errors":[],"size":0,"omap_ digest":"0x53f46ab0","data_ digest":"0xffffffff"},{"osd": 23,"errors":[],"size":0,"omap_ digest":"0x97b80594","data_ digest":"0xffffffff"}]}]} So from this, I think that the object in PG 2.9 with the problem is 10000411194.00000000. This is what I see on the filesystem on the 4 OSD's this PG resides on: -rw-r--r--. 1 ceph ceph 0 Apr 27 12:31 /var/lib/ceph/osd/ceph-3/ current/2.9_head/DIR_9/DIR_E/ DIR_A/DIR_1/10000411194. 00000000__head_1ACD1AE9__2 -rw-r--r--. 1 ceph ceph 0 Apr 15 22:05 /var/lib/ceph/osd/ceph-10/ current/2.9_head/DIR_9/DIR_E/ DIR_A/DIR_1/10000411194. 00000000__head_1ACD1AE9__2 -rw-r--r--. 1 ceph ceph 0 Apr 15 22:07 /var/lib/ceph/osd/ceph-11/ current/2.9_head/DIR_9/DIR_E/ DIR_A/DIR_1/10000411194. 00000000__head_1ACD1AE9__2 -rw-r--r--. 1 ceph ceph 0 Apr 16 03:58 /var/lib/ceph/osd/ceph-23/ current/2.9_head/DIR_9/DIR_E/ DIR_A/DIR_1/10000411194. 00000000__head_1ACD1AE9__2 The extended attrs are as follows, although I have no idea what any of them mean. # file: var/lib/ceph/osd/ceph-11/ current/2.9_head/DIR_9/DIR_E/ DIR_A/DIR_1/10000411194. 00000000__head_1ACD1AE9__2 user.ceph._= 0sDwj5AAAABAM1AAAAAAAAABQAAAAx MDAwMDQxMTE5NC4wMDAwMDAwMP7/// ////// 6RrNGgAAAAAAAgAAAAAAAAAGAxwAAA ACAAAAAAAAAP////8AAAAAAAAAAP// //////// AAAAABUn4QAAAAAAu4IAAK4m4QAAAA AAu4IAAAICFQAAAAIAAAAAAAAAAOSZ DAAAAAAAsEUDAAAAAAAAAAAAjUoIWU gWsQQCAhUAAAAAAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAAAAAAAAAAAAA AAAAAAAAAVJ+ EAAAAAAAAAAAAAAAAAABwAAACNSghZ ESm8BP///w== user.ceph._@1=0s//////8= user.ceph._layout= 0sAgIYAAAAAAAAAAAAAAAAAAAA//// //////8AAAAA user.ceph._parent= 0sBQRPAQAAlBFBAAABAAAIAAAAAgIj AAAAjxFBAAABAAAPAAAAdHViZWFtYX RldXIubmV0qdgAAAAAAAACAh0AAAB/ EUEAAAEAAAkAAAB3cC1yb2NrZXREAA AAAAAAAAICGQAAABYNQQAAAQAABQAA AGNhY2hlUgAAAAAAAAACAh4AAAAQDU EAAAEAAAoAAAB3cC1jb250ZW50NAMA AAAAAAACAhgAAAANDUEAAAEAAAQAAA BodG1sIAEAAAAAAAACAikAAADagTMA AAEAABUAAABuZ2lueC1waHA3LWNsdm dmLWRhdGGJAAAAAAAAAAICMwAAADkA AAAAAQ== user.ceph._parent@1 = 0sAAAfAAAANDg4LTU3YjI2NTdmMmZh MTMtbWktcHJveWVjdG8tMXSQCAAAAA AAAgIcAAAAAQAAAAAAAAAIAAAAcHJv amVjdHPBAgcAAAAAAAIAAAAAAAAAAA AAAA== user.ceph.snapset= 0sAgIZAAAAAAAAAAAAAAABAAAAAAAA AAAAAAAAAAAAAA== user.cephos.seq= 0sAQEQAAAAgcAqFAAAAAAAAAAAAgAA AAA= user.cephos.spill_out=0sMAA= getfattr: Removing leading '/' from absolute path names # file: var/lib/ceph/osd/ceph-3/ current/2.9_head/DIR_9/DIR_E/ DIR_A/DIR_1/10000411194. 00000000__head_1ACD1AE9__2 user.ceph._= 0sDwj5AAAABAM1AAAAAAAAABQAAAAx MDAwMDQxMTE5NC4wMDAwMDAwMP7/// ////// 6RrNGgAAAAAAAgAAAAAAAAAGAxwAAA ACAAAAAAAAAP////8AAAAAAAAAAP// //////// AAAAABUn4QAAAAAAu4IAAK4m4QAAAA AAu4IAAAICFQAAAAIAAAAAAAAAAOSZ DAAAAAAAsEUDAAAAAAAAAAAAjUoIWU gWsQQCAhUAAAAAAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAAAAAAAAAAAAA AAAAAAAAAVJ+ EAAAAAAAAAAAAAAAAAABwAAACNSghZ ESm8BP///w== user.ceph._@1=0s//////8= user.ceph._layout= 0sAgIYAAAAAAAAAAAAAAAAAAAA//// //////8AAAAA user.ceph._parent= 0sBQRPAQAAlBFBAAABAAAIAAAAAgIj AAAAjxFBAAABAAAPAAAAdHViZWFtYX RldXIubmV0qdgAAAAAAAACAh0AAAB/ EUEAAAEAAAkAAAB3cC1yb2NrZXREAA AAAAAAAAICGQAAABYNQQAAAQAABQAA AGNhY2hlUgAAAAAAAAACAh4AAAAQDU EAAAEAAAoAAAB3cC1jb250ZW50NAMA AAAAAAACAhgAAAANDUEAAAEAAAQAAA BodG1sIAEAAAAAAAACAikAAADagTMA AAEAABUAAABuZ2lueC1waHA3LWNsdm dmLWRhdGGJAAAAAAAAAAICMwAAADkA AAAAAQ== user.ceph._parent@1 = 0sAAAfAAAANDg4LTU3YjI2NTdmMmZh MTMtbWktcHJveWVjdG8tMXSQCAAAAA AAAgIcAAAAAQAAAAAAAAAIAAAAcHJv amVjdHPBAgcAAAAAAAIAAAAAAAAAAA AAAA== user.ceph.snapset= 0sAgIZAAAAAAAAAAAAAAABAAAAAAAA AAAAAAAAAAAAAA== user.cephos.seq= 0sAQEQAAAAZaQ9GwAAAAAAAAAAAgAA AAA= user.cephos.spill_out=0sMAA= getfattr: Removing leading '/' from absolute path names # file: var/lib/ceph/osd/ceph-10/ current/2.9_head/DIR_9/DIR_E/ DIR_A/DIR_1/10000411194. 00000000__head_1ACD1AE9__2 user.ceph._= 0sDwj5AAAABAM1AAAAAAAAABQAAAAx MDAwMDQxMTE5NC4wMDAwMDAwMP7/// ////// 6RrNGgAAAAAAAgAAAAAAAAAGAxwAAA ACAAAAAAAAAP////8AAAAAAAAAAP// //////// AAAAABUn4QAAAAAAu4IAAK4m4QAAAA AAu4IAAAICFQAAAAIAAAAAAAAAAOSZ DAAAAAAAsEUDAAAAAAAAAAAAjUoIWU gWsQQCAhUAAAAAAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAAAAAAAAAAAAA AAAAAAAAAVJ+ EAAAAAAAAAAAAAAAAAABwAAACNSghZ ESm8BP///w== user.ceph._@1=0s//////8= user.ceph._layout= 0sAgIYAAAAAAAAAAAAAAAAAAAA//// //////8AAAAA user.ceph._parent= 0sBQRPAQAAlBFBAAABAAAIAAAAAgIj AAAAjxFBAAABAAAPAAAAdHViZWFtYX RldXIubmV0qdgAAAAAAAACAh0AAAB/ EUEAAAEAAAkAAAB3cC1yb2NrZXREAA AAAAAAAAICGQAAABYNQQAAAQAABQAA AGNhY2hlUgAAAAAAAAACAh4AAAAQDU EAAAEAAAoAAAB3cC1jb250ZW50NAMA AAAAAAACAhgAAAANDUEAAAEAAAQAAA BodG1sIAEAAAAAAAACAikAAADagTMA AAEAABUAAABuZ2lueC1waHA3LWNsdm dmLWRhdGGJAAAAAAAAAAICMwAAADkA AAAAAQ== user.ceph._parent@1 = 0sAAAfAAAANDg4LTU3YjI2NTdmMmZh MTMtbWktcHJveWVjdG8tMXSQCAAAAA AAAgIcAAAAAQAAAAAAAAAIAAAAcHJv amVjdHPBAgcAAAAAAAIAAAAAAAAAAA AAAA== user.ceph.snapset= 0sAgIZAAAAAAAAAAAAAAABAAAAAAAA AAAAAAAAAAAAAA== user.cephos.seq= 0sAQEQAAAA1T1dEQAAAAAAAAAAAgAA AAA= user.cephos.spill_out=0sMAA= getfattr: Removing leading '/' from absolute path names # file: var/lib/ceph/osd/ceph-23/ current/2.9_head/DIR_9/DIR_E/ DIR_A/DIR_1/10000411194. 00000000__head_1ACD1AE9__2 user.ceph._= 0sDwj5AAAABAM1AAAAAAAAABQAAAAx MDAwMDQxMTE5NC4wMDAwMDAwMP7/// ////// 6RrNGgAAAAAAAgAAAAAAAAAGAxwAAA ACAAAAAAAAAP////8AAAAAAAAAAP// //////// AAAAABUn4QAAAAAAu4IAAK4m4QAAAA AAu4IAAAICFQAAAAIAAAAAAAAAAOSZ DAAAAAAAsEUDAAAAAAAAAAAAjUoIWU gWsQQCAhUAAAAAAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAAAAAAAAAAAAA AAAAAAAAAVJ+ EAAAAAAAAAAAAAAAAAABwAAACNSghZ ESm8BP///w== user.ceph._@1=0s//////8= user.ceph._layout= 0sAgIYAAAAAAAAAAAAAAAAAAAA//// //////8AAAAA user.ceph._parent= 0sBQRPAQAAlBFBAAABAAAIAAAAAgIj AAAAjxFBAAABAAAPAAAAdHViZWFtYX RldXIubmV0qdgAAAAAAAACAh0AAAB/ EUEAAAEAAAkAAAB3cC1yb2NrZXREAA AAAAAAAAICGQAAABYNQQAAAQAABQAA AGNhY2hlUgAAAAAAAAACAh4AAAAQDU EAAAEAAAoAAAB3cC1jb250ZW50NAMA AAAAAAACAhgAAAANDUEAAAEAAAQAAA BodG1sIAEAAAAAAAACAikAAADagTMA AAEAABUAAABuZ2lueC1waHA3LWNsdm dmLWRhdGGJAAAAAAAAAAICMwAAADkA AAAAAQ== user.ceph._parent@1 = 0sAAAfAAAANDg4LTU3YjI2NTdmMmZh MTMtbWktcHJveWVjdG8tMXSQCAAAAA AAAgIcAAAAAQAAAAAAAAAIAAAAcHJv amVjdHPBAgcAAAAAAAIAAAAAAAAAAA AAAA== user.ceph.snapset= 0sAgIZAAAAAAAAAAAAAAABAAAAAAAA AAAAAAAAAAAAAA== user.cephos.seq= 0sAQEQAAAADiM7AAAAAAAAAAAAAgAA AAA= user.cephos.spill_out=0sMAA= getfattr: Removing leading '/' from absolute path names With metadata damage issue, I can get the list of inodes with the command below. $ ceph tell mds.0 damage ls | python -m "json.tool" [ { "damage_type": "dir_frag", "frag": "*", "id": 5129156, "ino": 1099556021325 }, { "damage_type": "dir_frag", "frag": "*", "id": 8983971, "ino": 1099548098243 }, { "damage_type": "dir_frag", "frag": "*", "id": 33278608, "ino": 1099548257921 }, { "damage_type": "dir_frag", "frag": "*", "id": 33455691, "ino": 1099548271575 }, { "damage_type": "dir_frag", "frag": "*", "id": 38203788, "ino": 1099548134708 }, ... All of the inodes (approx 800 of them) are for various directories within a wordpress cache directory. I ran an rm -rf on each of the directories as I do not need the content. The content of the directories was removed, but the directories are unable to be removed as rmdir reports they are not empty, despite having 0 files listed with ls. I'm not sure if these two issues are related to each other. They were noticed within a day of each other. I think the metadata damage error appeared before the scrub error. I'm at a bit of a loss with how to proceed and I don't want to make things worse. I'd really appreciate any help that anyone can give to try and resolve these problems. Thanks J
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