Re: Multiple issues :( Ubuntu 14.04, latest Ceph

Benjamin <zorlin@xxxxxxxxx> · Tue, 16 Dec 2014 06:46:48 +0000

Hi Udo,
Thanks! Creating the MDS did not add a data and metadata pool for me but I was able to simply create them myself.
The tutorials also suggest you make new pools, cephfs_data and cephfs_metadata - would simply using data and metadata work better?
- B

On Mon, Dec 15, 2014, 10:37 PM Udo Lembke <ulembke@xxxxxxxxxxxx> wrote:

    Hi,

    see here:
    https://www.mail-archive.com/ceph-users@xxxxxxxxxxxxxx/msg15546.html

    Udo

    On 16.12.2014 05:39, Benjamin wrote:

      I increased the OSDs to 10.5GB each and now I have
        a different issue...

          cephy@ceph-admin0:~/ceph-cluster$ echo {Test-data} >
            testfile.txt
          cephy@ceph-admin0:~/ceph-cluster$ rados put test-object-1
            testfile.txt --pool=data
          error opening pool data: (2) No such file or directory
          cephy@ceph-admin0:~/ceph-cluster$ ceph osd lspools
          0 rbd,

        Here's ceph -w:

          cephy@ceph-admin0:~/ceph-cluster$ ceph -w
              cluster b3e15af-SNIP
               health HEALTH_WARN mon.ceph0 low disk space;
            mon.ceph1 low disk space; mon.ceph2 low disk space; clock
            skew detected on mon.ceph0, mon.ceph1, mon.ceph2
               monmap e3: 4 mons at {ceph-admin0=10.0.1.10:6789/0,ceph0=10.0.1.11:6789/0,ceph1=10.0.1.12:6789/0,ceph2=10.0.1.13:6789/0},
            election epoch 10, quorum 0,1,2,3
            ceph-admin0,ceph0,ceph1,ceph2
               osdmap e17: 3 osds: 3 up, 3 in
                pgmap v36: 64 pgs, 1 pools, 0 bytes data, 0 objects
                      19781 MB used, 7050 MB / 28339 MB avail
                            64 active+clean

        Any other commands to run that would be helpful? Is it safe
          to simply manually create the "data" and "metadata" pools
          myself?

        On Mon, Dec 15, 2014 at 5:07 PM,
          Benjamin <zorlin@xxxxxxxxx>
          wrote:

            Aha, excellent suggestion! I'll try that as
              soon as I get back, thank you.

                  - B

                On Dec 15, 2014 5:06 PM, "Craig
                  Lewis" <clewis@xxxxxxxxxxxxxxxxxx>
                  wrote:

                        On Sun, Dec 14, 2014 at
                          6:31 PM, Benjamin <zorlin@xxxxxxxxx>
                          wrote:

                            The machines each have Ubuntu 14.04
                              64-bit, with 1GB of RAM and 8GB of disk.
                              They have between 10% and 30% disk
                              utilization but common between all of them
                              is that they have free disk space meaning
                              I have no idea what the heck is causing
                              Ceph to complain.

                        Each OSD is 8GB?  You need to make them at least
                        10 GB.

                      Ceph weights each disk as
                        it's size in TiB, and it truncates to two
                        decimal places.  So your 8 GiB disks have a
                        weight of 0.00.  Bump it up to 10 GiB, and it'll
                        get a weight of 0.01.

                      You should have 3 OSDs,
                        one for each of ceph0,ceph1,ceph2.

                      If that
                          doesn't fix the problem, go ahead and post the
                          things Udo mentioned.

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