Hello Oliver, this issue showed very hard to reproduce, i couldn't make it again.
My best guess is something with the Azure's network since last week (when happened a lot) there were a ongoing maintenance.
Here's the outputs:
$ ceph -s
cluster 25736883-dbf1-4d7a-8796-50e36f9de7a6
health HEALTH_OK
monmap e1: 4 mons at {osmbr0=10.0.3.4:6789/0,osmbr1=10.0.3.6:6789/0,osmbr2=10.0.3.14:6789/0,osmbr3=10.0.3.7:6789/0}
election epoch 602, quorum 0,1,2,3 osmbr0,osmbr1,osmbr3,osmbr2
osdmap e1816: 10 osds: 10 up, 10 in
pgmap v3158931: 128 pgs, 1 pools, 11512 MB data, 3522 objects
34959 MB used, 10195 GB / 10229 GB avail
128 active+clean
client io 87723 B/s wr, 8 op/s
$ ceph osd df
ID WEIGHT REWEIGHT SIZE USE AVAIL %USE VAR
6 1.00000 1.00000 1022G 3224M 1019G 0.31 0.92
1 1.00000 1.00000 1022G 3489M 1019G 0.33 1.00
2 1.00000 1.00000 1022G 3945M 1019G 0.38 1.13
4 1.00000 1.00000 1022G 3304M 1019G 0.32 0.95
7 1.00000 1.00000 1022G 3427M 1019G 0.33 0.98
3 1.00000 1.00000 1022G 4361M 1018G 0.42 1.25
9 1.00000 1.00000 1022G 3650M 1019G 0.35 1.04
0 1.00000 1.00000 1022G 3210M 1019G 0.31 0.92
5 1.00000 1.00000 1022G 3577M 1019G 0.34 1.02
8 1.00000 1.00000 1022G 2765M 1020G 0.26 0.79
TOTAL 10229G 34957M 10195G 0.33
MIN/MAX VAR: 0.79/1.25 STDDEV: 0.04
$ ceph osd perf
osd fs_commit_latency(ms) fs_apply_latency(ms)
0 1 2
1 1 2
2 2 3
3 2 3
4 1 2
5 2 3
6 1 2
7 2 3
8 1 2
9 1 1
---
Diego Castro / The CloudFather
GetupCloud.com - Eliminamos a Gravidade
GetupCloud.com - Eliminamos a Gravidade
2016-03-31 18:00 GMT-03:00 Oliver Dzombic <info@xxxxxxxxxxxxxxxxx>:
Hi Diego,
lets start with the basics and please give us the output of
ceph -s
ceph osd df
ceph osd perf
at best before and after you provike the iowait.
Thank you !
--
Mit freundlichen Gruessen / Best regards
Oliver Dzombic
IP-Interactive
mailto:info@xxxxxxxxxxxxxxxxx
Anschrift:
IP Interactive UG ( haftungsbeschraenkt )
Zum Sonnenberg 1-3
63571 Gelnhausen
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Geschäftsführung: Oliver Dzombic
Steuer Nr.: 35 236 3622 1
UST ID: DE274086107
Am 31.03.2016 um 21:38 schrieb Diego Castro:
> Hello, everyone.
> I have a pretty basic ceph setup running on top of Azure Cloud, (4 mons
> and 10 osd's) for rbd images.
> Everything seems to be working as expected until i put some load on it,
> sometimes it doesn't complete the process (mysql restore for ex.) and
> sometimes it does without any issues.
>
>
> Client Kernel: 3.10.0-327.10.1.el7.x86_64
> OSD Kernel: 3.10.0-229.7.2.el7.x86_64
>
> Ceph: ceph-0.94.5-0.el7.x86_64
>
> On the client side, i have 100%iowait, a lot of "INFO: task blocked for
> more than 120 seconds"
> On the osd side, i have no evidences of faulty disk or read/write
> latency, but i found the following messages:
>
>
> 2016-03-28 17:04:03.425249 7f7329fc5700 0 bad crc in data 641367213 !=
> exp 3107019767
> 2016-03-28 17:04:03.440599 7f7329fc5700 0 -- 10.0.3.9:6800/2272
> <http://10.0.3.9:6800/2272> >> 10.0.2.5:0/1998047321
> <http://10.0.2.5:0/1998047321> pipe(0x13cc4800 sd=54 :6800 s=0 pgs=0
> cs=0 l=0 c=0x13883f40).accept peer addr is really 10.0.2.5:0/1998047321
> <http://10.0.2.5:0/1998047321> (socket is 10.0.2.5:34702/0
> <http://10.0.2.5:34702/0>)
> 2016-03-28 17:04:03.487497 7f7333e6a700 0 -- 10.0.3.9:6800/2272
> <http://10.0.3.9:6800/2272> submit_message osd_op_reply(20046
> rb.0.6040.238e1f29.000000000074 [set-alloc-hint object_size 4194304
> write_size 4194304,write 0~524288] v1753'32512 uv32512 _ondisk_ = 0) v6
> remote, 10.0.2.5:0/1998047321 <http://10.0.2.5:0/1998047321>, failed
> lossy con, dropping message 0x12b539c0
> 2016-03-28 17:04:03.532302 7f733666f700 0 -- 10.0.3.9:6800/2272
> <http://10.0.3.9:6800/2272> submit_message osd_op_reply(20047
> rb.0.6040.238e1f29.000000000074 [set-alloc-hint object_size 4194304
> write_size 4194304,write 524288~524288] v1753'32513 uv32513 _ondisk_ = 0)
> v6 remote, 10.0.2.5:0/1998047321 <http://10.0.2.5:0/1998047321>, failed
> lossy con, dropping message 0x1667bc80
> 2016-03-28 17:04:03.535143 7f7333e6a700 0 -- 10.0.3.9:6800/2272
> <http://10.0.3.9:6800/2272> submit_message osd_op_reply(20048
> rb.0.6040.238e1f29.000000000074 [set-alloc-hint object_size 4194304
> write_size 4194304,write 1048576~524288] v1753'32514 uv32514 _ondisk_ = 0)
> v6 remote, 10.0.2.5:0/1998047321 <http://10.0.2.5:0/1998047321>, failed
> lossy con, dropping message 0x12b56e00
>
> ---
> Diego Castro / The CloudFather
> GetupCloud.com - Eliminamos a Gravidade
>
>
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>
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