Re: Urgent help needed for ceph storage "mount error 5 = Input/output error"

[Goncalo Borges <goncalo.borges@xxxxxxxxxxxxx>]

Hi X

Have you tried to inspect the mds for problematic sessions still connected from those clients?

To check which sessions are still connected to the mds, do (in ceph 9.2.0, the command might be different or even do not exist in other older versions)

    ceph daemon mds.<name> session ls

Cheers
G.

 

---

From: ceph-users [ceph-users-bounces@xxxxxxxxxxxxxx] on behalf of Zhao Xu [xuzh.fdu@xxxxxxxxx]
Sent: 03 February 2016 08:10
To: Mykola Dvornik
Cc: ceph-users@xxxxxxxxxxxxxx
Subject: Re: Urgent help needed for ceph storage "mount error 5 = Input/output error"

I am not lucky on the ceph-fuse

[root@igc-head ~]# ceph-fuse -d -m igc-head,is1,i1,i2,i3:6789 /mnt/igcfs/ 

2016-02-03 04:55:08.756420 7fe3f7437780  0 ceph version 0.94.5 (9764da52395923e0b32908d83a9f7304401fee43), process ceph-fuse, pid 5822

ceph-fuse[5822]: starting ceph client

2016-02-03 04:55:08.794920 7fe3f7437780 -1 init, newargv = 0x3292e20 newargc=11

ceph-fuse[5822]: ceph mount failed with (110) Connection timed out

2016-02-03 05:00:08.829498 7fe3e77fe700  0 client.274164 ms_handle_reset on 10.1.10.1:6800/2641

[root@igc-head ~]# ceph-fuse -d -m igc-head:6789 /mnt/igcfs/ 

2016-02-03 05:00:47.029698 7f1ec270a780  0 ceph version 0.94.5 (9764da52395923e0b32908d83a9f7304401fee43), process ceph-fuse, pid 5939

ceph-fuse[5939]: starting ceph client

2016-02-03 05:00:47.067364 7f1ec270a780 -1 init, newargv = 0x2dd9330 newargc=11

ceph-fuse[5939]: ceph mount failed with (110) Connection timed out

2016-02-03 05:05:47.100815 7f1eb67fc700  0 client.274125 ms_handle_reset on 10.1.10.1:6800/2641

Any log file I should provide here?

Thanks,
X

On Tue, Feb 2, 2016 at 11:47 AM, Mykola Dvornik <mykola.dvornik@xxxxxxxxx> wrote:

Try to mount with ceph-fuse. It worked for me when I've faced the same sort of issues you are now dealing with.

-Mykola

On Tue, Feb 2, 2016 at 8:42 PM, Zhao Xu <xuzh.fdu@xxxxxxxxx> wrote:

Thank you Mykola. The issue is that I/we strongly suggested to add OSD for many times, but we are not the decision maker.

For now, I just want to mount the ceph drive again, even in read only mode, so that they can read the data. Any idea on how to achieve this?

Thanks,
X

On Tue, Feb 2, 2016 at 9:57 AM, Mykola Dvornik <mykola.dvornik@xxxxxxxxx> wrote:

I would strongly(!) suggest you to add few more OSDs to cluster before things get worse / corrupted.

-Mykola

On Tue, Feb 2, 2016 at 6:45 PM, Zhao Xu <xuzh.fdu@xxxxxxxxx> wrote:

Hi All,

  Recently our ceph storage is running at low performance. Today, we can not write to the folder. We tried to unmount the ceph storage then to re-mount it, however, we can not even mount it now:

# mount -v -t  ceph igc-head,is1,i1,i2,i3:6789:/ /mnt/igcfs/ -o name=admin,secretfile=/etc/admin.secret

parsing options: rw,name=admin,secretfile=/etc/admin.secret

mount error 5 = Input/output error

  Previously there are some nearly full osd, so we did the "ceph osd reweight-by-utilization" to rebalance the usage. The ceph health is not ideal but it should still alive. Please help me to mount the disk again. 

[root@igc-head ~]# ceph -s

    cluster debdcfe9-20d3-404b-921c-2210534454e1

     health HEALTH_WARN

            39 pgs degraded

            39 pgs stuck degraded

            3 pgs stuck inactive

            332 pgs stuck unclean

            39 pgs stuck undersized

            39 pgs undersized

            48 requests are blocked > 32 sec

            recovery 129755/8053623 objects degraded (1.611%)

            recovery 965837/8053623 objects misplaced (11.993%)

            mds0: Behind on trimming (455/30)

            clock skew detected on mon.i1, mon.i2, mon.i3

     monmap e1: 5 mons at {i1=10.1.10.11:6789/0,i2=10.1.10.12:6789/0,i3=10.1.10.13:6789/0,igc-head=10.1.10.1:6789/0,is1=10.1.10.100:6789/0}

            election epoch 1314, quorum 0,1,2,3,4 igc-head,i1,i2,i3,is1

     mdsmap e1602: 1/1/1 up {0=igc-head=up:active}

     osdmap e8007: 17 osds: 17 up, 17 in; 298 remapped pgs

      pgmap v5726326: 1088 pgs, 3 pools, 7442 GB data, 2621 kobjects

            22228 GB used, 18652 GB / 40881 GB avail

            129755/8053623 objects degraded (1.611%)

            965837/8053623 objects misplaced (11.993%)

                 755 active+clean

                 293 active+remapped

                  31 active+undersized+degraded

                   5 active+undersized+degraded+remapped

                   3 undersized+degraded+peered

                   1 active+clean+scrubbing

[root@igc-head ~]# ceph osd tree

ID WEIGHT   TYPE NAME      UP/DOWN REWEIGHT PRIMARY-AFFINITY 

-1 39.86992 root default                                     

-2 18.14995     host is1                                     

 0  3.62999         osd.0       up  1.00000          1.00000 

 1  3.62999         osd.1       up  1.00000          1.00000 

 2  3.62999         osd.2       up  1.00000          1.00000 

 3  3.62999         osd.3       up  1.00000          1.00000 

 4  3.62999         osd.4       up  1.00000          1.00000 

-3  7.23999     host i1                                      

 5  1.81000         osd.5       up  0.44101          1.00000 

 6  1.81000         osd.6       up  0.40675          1.00000 

 7  1.81000         osd.7       up  0.60754          1.00000 

 8  1.81000         osd.8       up  0.50868          1.00000 

-4  7.23999     host i2                                      

 9  1.81000         osd.9       up  0.54956          1.00000 

10  1.81000         osd.10      up  0.44815          1.00000 

11  1.81000         osd.11      up  0.53262          1.00000 

12  1.81000         osd.12      up  0.47197          1.00000 

-5  7.23999     host i3                                      

13  1.81000         osd.13      up  0.55557          1.00000 

14  1.81000         osd.14      up  0.65874          1.00000 

15  1.81000         osd.15      up  0.49663          1.00000 

16  1.81000         osd.16      up  0.50136          1.00000 

Thanks,

X

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