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?
sage
--
To unsubscribe from this list: send the line "unsubscribe ceph-devel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
