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All, I have a set of hardware with a few systems connected via IB along with a DDN SFA12K. There are 4 IB/SRP paths to each block device. Those show up as /dev/mapper/mpath[b-d] I am trying to do an initial install/setup of ceph on 3 nodes. Each will be a monitor as well as host a single OSD. I am using the ceph-deploy to do most of the heavy lifting (using CentOS 7.2.1511). Everything is quite successful installing monitors and even the first OSD. ceph status shows: cluster 0d9e68e4-176d-4229-866b-d408f8055e5b health HEALTH_OK monmap e1: 3 mons at {ceph-1-35a=10.100.1.35:6789/0,ceph-1-35b=10.100.1.85:6789/0,ceph-1-36a=10.100.1.36:6789/0} election epoch 8, quorum 0,1,2 ceph-1-35a,ceph-1-36a,ceph-1-35b osdmap e5: 1 osds: 1 up, 1 in flags sortbitwise pgmap v8: 64 pgs, 1 pools, 0 bytes data, 0 objects 40112 kB used, 43888 GB / 43889 GB avail 64 active+clean But as soon as I try to add the next OSD on the next system using
ceph-deploy osd create ceph-1-35b:/dev/mapper/mpathc things start acting up. The last bit from the output seems ok: [ceph-1-35b][INFO ] Running command: ceph --cluster=ceph osd stat --format=json [ceph-1-35b][WARNIN] there is 1 OSD down [ceph-1-35b][WARNIN] there is 1 OSD out [ceph_deploy.osd][DEBUG ] Host ceph-1-35b is now ready for osd use. But, ceph status is now: cluster 0d9e68e4-176d-4229-866b-d408f8055e5b health HEALTH_OK monmap e1: 3 mons at {ceph-1-35a=10.100.1.35:6789/0,ceph-1-35b=10.100.1.85:6789/0,ceph-1-36a=10.100.1.36:6789/0} election epoch 8, quorum 0,1,2 ceph-1-35a,ceph-1-36a,ceph-1-35b osdmap e6: 2 osds: 1 up, 1 in flags sortbitwise pgmap v10: 64 pgs, 1 pools, 0 bytes data, 0 objects 40120 kB used, 43888 GB / 43889 GB avail 64 active+clean And ceph osd tree: ID WEIGHT TYPE NAME UP/DOWN REWEIGHT PRIMARY-AFFINITY -1 42.86040 root default -2 42.86040 host ceph-1-35a 0 42.86040 osd.0 up 1.00000 1.00000 1 0 osd.1 down 0 1.00000 I don’t understand why ceph-deploy didn’t activate this one when it did for the first. The OSD is not mounted on the other box. I can try to activate the down OSD (ceph-deploy disk activate ceph-1-35b:/dev/mapper/mpathc1:/dev/mapper/mpathc2) Things look good for a bit: cluster 0d9e68e4-176d-4229-866b-d408f8055e5b health HEALTH_OK monmap e1: 3 mons at {ceph-1-35a=10.100.1.35:6789/0,ceph-1-35b=10.100.1.85:6789/0,ceph-1-36a=10.100.1.36:6789/0} election epoch 8, quorum 0,1,2 ceph-1-35a,ceph-1-36a,ceph-1-35b osdmap e8: 2 osds: 2 up, 2 in flags sortbitwise pgmap v14: 64 pgs, 1 pools, 0 bytes data, 0 objects 74804 kB used, 87777 GB / 87778 GB avail 64 active+clean But after about 1 minute, it goes down: ceph osd tree ID WEIGHT TYPE NAME UP/DOWN REWEIGHT PRIMARY-AFFINITY -1 85.72079 root default -2 42.86040 host ceph-1-35a 0 42.86040 osd.0 up 1.00000 1.00000 -3 42.86040 host ceph-1-35b 1 42.86040 osd.1 down 1.00000 1.00000 ceph status cluster 0d9e68e4-176d-4229-866b-d408f8055e5b health HEALTH_WARN 1/2 in osds are down monmap e1: 3 mons at {ceph-1-35a=10.100.1.35:6789/0,ceph-1-35b=10.100.1.85:6789/0,ceph-1-36a=10.100.1.36:6789/0} election epoch 8, quorum 0,1,2 ceph-1-35a,ceph-1-36a,ceph-1-35b osdmap e9: 2 osds: 1 up, 2 in flags sortbitwise pgmap v15: 64 pgs, 1 pools, 0 bytes data, 0 objects 74804 kB used, 87777 GB / 87778 GB avail 64 active+clean Has anyone played with getting multipath devices to work? Thanks in advance, Brian Andrus ITACS/Research Computing Naval Postgraduate School Monterey, California voice: 831-656-6238 |
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