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

[Mykola Dvornik <mykola.dvornik@xxxxxxxxx>]

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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