Hi,
Testing with Kraken 11.2.0 with BlueStore I noticed something regarding the OSD metadata.
$ ceph osd metadata 0
{
"id": 0,
"arch": "x86_64",
"back_addr": "[2001:db8::100]:6801\/3634",
"ceph_version": "ceph version 11.2.0 (f223e27eeb35991352ebc1f67423d4ebc252adb7)",
"cpu": "Intel(R) Core(TM) i5-3427U CPU @ 1.80GHz",
"distro": "ubuntu",
"distro_description": "Ubuntu 16.04.1 LTS",
"distro_version": "16.04",
"front_addr": "[2001:db8::100]:6800\/3634",
"hb_back_addr": "[2001:db8::100]:6802\/3634",
"hb_front_addr": "[2001:db8::100]:6803\/3634",
"hostname": "alpha",
"kernel_description": "#50-Ubuntu SMP Wed Jul 13 00:07:12 UTC 2016",
"kernel_version": "4.4.0-31-generic",
"mem_swap_kb": "522236",
"mem_total_kb": "500192",
"os": "Linux",
"osd_data": "\/var\/lib\/ceph\/osd\/ceph-0",
"osd_journal": "\/var\/lib\/ceph\/osd\/ceph-0\/journal",
"osd_objectstore": "filestore"
}
The OSD in this case is however using Bluestore:
root@alpha:~# df -h /var/lib/ceph/osd/ceph-0
Filesystem Size Used Avail Use% Mounted on
/dev/sdb1 97M 5.4M 92M 6% /var/lib/ceph/osd/ceph-0
root@alpha:~# cat /var/lib/ceph/osd/ceph-0/type
bluestore
root@alpha:~#
Looking at the code in src/osd/OSD.cc in void OSD::_collect_metadata(map<string,string> *pm):
// backend
(*pm)["osd_objectstore"] = cct->_conf->osd_objectstore;
It seems that osd_objectstore is set to what is defined in the configuration, but in config_opts.h this defaults to filestore:
OPTION(osd_objectstore, OPT_STR, "filestore") // ObjectStore backend type
It however seems that this configuration option doesn't do anything.
Am I correct or am I missing something here?
Wido
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