> Op 23 januari 2017 om 19:20 schreef Sage Weil <sage@xxxxxxxxxxxx>:
>
>
> On Mon, 23 Jan 2017, Wido den Hollander wrote:
> > 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?
>
> Yep, it's a bug! The config option only controls mkfs behavior. This
> should look at the instantiated store, not the config. Open a ticket
> please?
>
I will! I'll also take a try with a PR to go along with it.
Wido
> sage
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