Hi, I am setting up a ceph cluster for some experimentation. The cluster is setup successfully. But, When I try running rbd map on the host, the kernel crashes(system hangs) and I need to do a hard reset for it to recover. Below is my setup.
All my nodes have Linux kernel 3.5 with Ubuntu 12.04. Iam installing the emperor version of Ceph. Below are the ceph cluster status: *root@CephMon:~# ceph osd tree* *# id weight type name up/down reweight* *-1 2.2 root default* *-2 1.66 host cephnode2* *0 0.9 osd.0 up 1* *3 0.76 osd.3 up 1* *-3 0.54 host cephnode4* *1 0.27 osd.1 up 1* *2 0.27 osd.2 up 1* *root@CephMon:~#* *root@CephMon:~# ceph osd dump* *epoch 65* *fsid bef84776-a957-495e-be34-c353eb76c3d7* *created 2014-05-27 08:53:59.112200* *modified 2014-05-27 15:05:42.742630* *flags * *pool 0 'data' replicated size 2 min_size 1 crush_ruleset 0 object_hash rjenkins pg_num 64 pgp_num 64 last_change 38 owner 0 flags hashpspool crash_replay_interval 45 stripe_width 0* *pool 1 'metadata' replicated size 2 min_size 1 crush_ruleset 0 object_hash rjenkins pg_num 64 pgp_num 64 last_change 36 owner 0 flags hashpspool stripe_width 0* *pool 2 'rbd' replicated size 2 min_size 1 crush_ruleset 0 object_hash rjenkins pg_num 96 pgp_num 96 last_change 61 owner 0 flags hashpspool stripe_width 0* *max_osd 4* *osd.0 up in weight 1 up_from 4 up_thru 61 down_at 0 last_clean_interval [0,0) 10.223.169.166:6800/26254 <http://10.223.169.166:6800/26254> 10.223.169.166:6801/26254 <http://10.223.169.166:6801/26254> 10.223.169.166:6802/26254 <http://10.223.169.166:6802/26254> 10.223.169.166:6803/26254 <http://10.223.169.166:6803/26254> exists,up 1aefbfb2-a220-4f0e-9d91-1b9344717337* *osd.1 up in weight 1 up_from 8 up_thru 61 down_at 0 last_clean_interval [0,0) 10.223.169.201:6800/32211 <http://10.223.169.201:6800/32211> 10.223.169.201:6801/32211 <http://10.223.169.201:6801/32211> 10.223.169.201:6802/32211 <http://10.223.169.201:6802/32211> 10.223.169.201:6803/32211 <http://10.223.169.201:6803/32211> exists,up 077d4fe2-e8f7-42ba-a569-87efc7c11fbe* *osd.2 up in weight 1 up_from 12 up_thru 61 down_at 0 last_clean_interval [0,0) 10.223.169.201:6805/33333 <http://10.223.169.201:6805/33333> 10.223.169.201:6806/33333 <http://10.223.169.201:6806/33333> 10.223.169.201:6807/33333 <http://10.223.169.201:6807/33333> 10.223.169.201:6808/33333 <http://10.223.169.201:6808/33333> exists,up 734fb969-1bb6-46ad-91c3-60b4647c90ac* *osd.3 up in weight 1 up_from 48 up_thru 61 down_at 0 last_clean_interval [0,0) 10.223.169.166:6805/27859 <http://10.223.169.166:6805/27859> 10.223.169.166:6806/27859 <http://10.223.169.166:6806/27859> 10.223.169.166:6807/27859 <http://10.223.169.166:6807/27859> 10.223.169.166:6808/27859 <http://10.223.169.166:6808/27859> exists,up 5b479abb-168a-411d-ba4e-a37e63fdfbd4* The following are the rbd commands used in the host: *rbd create test --size 1024 --pool rbd* *modprobe rbd* *rbd map test --pool rbd* Any pointers to this issue would be of great help. Thanks in Advance, Sharmila
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