Thursday, December 5, 2013

Ceph + OpenStack :: Part-4

Testing OpenStack Glance + RBD

  • To allow glance to keep images on ceph RBD volume , edit /etc/glance/glance-api.conf
default_store = rbd
# ============ RBD Store Options =============================

# Ceph configuration file path
# If using cephx authentication, this file should
# include a reference to the right keyring
# in a client. section
rbd_store_ceph_conf = /etc/ceph/ceph.conf

# RADOS user to authenticate as (only applicable if using cephx)
rbd_store_user = images         ## This is the ceph user that we have created above in this document

# RADOS pool in which images are stored
rbd_store_pool = ceph-images   ## This is the ceph pool for images that we have created above in this document

# Images will be chunked into objects of this size (in megabytes).
# For best performance, this should be a power of two
rbd_store_chunk_size = 8
  • Check ceph auth to make sure keys are present for client.images user . This should present here as we have created them earlier in this document.
[root@rdo ceph(keystone_admin)]# ceph auth list
installed auth entries:

   key: AQAxp35ScNUxOBAAfAXc+J5F3/v7jUrpztVRBQ==
   caps: [mds] allow
   caps: [mon] allow profile mds
   caps: [osd] allow rwx
   key: AQCOvWpSsKN4JBAA015Uf53JjGCJS4cgzhxGFg==
   caps: [mon] allow profile osd
   caps: [osd] allow *
   key: AQCn+mtSULePJxAACKvSkIqF39f5MaFiwsVR6Q==
   caps: [mon] allow profile osd
   caps: [osd] allow *
   key: AQCjNIZSOF7AFxAA3vwLvgaB3PI+WAZPt2eIlQ==
   caps: [mon] allow profile osd
   caps: [osd] allow *
   key: AQDHBmxSwKTZBxAAyWlQGj8H48sdPGl4PzlFbQ==
   caps: [mon] allow profile osd
   caps: [osd] allow *
   key: AQBv/WtSwH5gOBAAHrSWblzq/n/qPbaurBMC2g==
   caps: [mon] allow profile osd
   caps: [osd] allow *
   key: AQCiE2xSgDLQMRAAjWotlPtyqaSgpll1P6NTfw==
   caps: [mon] allow profile osd
   caps: [osd] allow *
   key: AQCrFGxSOEnjMRAAnrqLcMR8UHu3rTTTQ5DHjw==
   caps: [mon] allow profile osd
   caps: [osd] allow *
   key: AQAXFmxSUAmsJxAA83qr0mZ3sGLQbi+C59LXgw==
   caps: [mon] allow profile osd
   caps: [osd] allow *
   key: AQBpFmxSOCZFNBAAONPg5I3QnB3Wd/pr7rSkEg==
   caps: [mon] allow profile osd
   caps: [osd] allow *
   key: AQC7M4ZSSP9dMhAAh4HQ0uvKFs9yHiQrobXzUA==
   caps: [mon] allow profile osd
   caps: [osd] allow *
   caps: [mon] allow profile osd
   caps: [osd] allow *
   key: AQBSt2pS4M5cCBAAUd4jWA1vxJT+y5C9X6juzg==
   caps: [mds] allow
   caps: [mon] allow *
   caps: [osd] allow *
   key: AQBSt2pS8IirKxAAQ27MWZ4pEEBuNhCDrj/FRw==
   caps: [mon] allow profile bootstrap-mds
   key: AQBSt2pSYLXVGRAAYs0R8gXKSEct6ApEy4h6dQ==
   caps: [mon] allow profile bootstrap-osd
   key: AQDS04xSEJEYABAA8Kl9eEqIr3Y8pyz+tPRpvQ==
   caps: [mon] allow r
   caps: [osd] allow class-read object_prefix rbd_children, allow rwx pool=ceph-images
   key: AQC804xS8HzFJxAAD/zzQ8LMzq9wDLq/5a472g==
   caps: [mon] allow r
   caps: [osd] allow class-read object_prefix rbd_children, allow rwx pool=ceph-volumes, allow rx pool=ceph-images

[root@rdo ceph(keystone_admin)]#
  • Copy the keyrings file to glance directory. This is the same file that we have generated above in this document.
cp /etc/ceph/ceph.client.images.keyring /etc/glance
chown glance:glance /etc/glance/ceph.client.images.keyring

 #  service openstack-glance-api restart
 #  service openstack-glance-registry restart
 #  service openstack-glance-scrubber restart
  • Before creating a new glance image on ceph volume , check the ceph pool content ( in my case its empty and it should be , this is for the first time we are using this volume )
[root@rdo init.d(keystone_admin)]# rbd -p ceph-images ls
rbd: pool ceph-images doesn't contain rbd images
[root@rdo init.d(keystone_admin)]#
  • Download a new image or use if you have existing.
[root@rdo var(keystone_admin)]# wget
[root@rdo var(keystone_admin)]# glance add name="ceph-glance-image" is_public=True disk_format=qcow2 container_format=ovf architecture=x86_64 <  ubuntu-12.04.3-desktop-amd64.iso
Added new image with ID: fcc07414-bbb3-4473-a8df-523664c8c9df
[root@rdo var(keystone_admin)]# glance index
ID                                   Name                           Disk Format          Container Format     Size
------------------------------------ ------------------------------ -------------------- -------------------- --------------
fcc07414-bbb3-4473-a8df-523664c8c9df ceph-glance-image              qcow2                ovf                       742391808
3c2db0ad-8d1e-400d-ba13-a506448f2a8e precise-server-cloudimg        qcow2                ovf                       254738432
f61edc8d-c9a1-4ff4-b4fc-c8128bd1a10b Ubuntu 12.04 cloudimg amd64    qcow2                ovf                       254738432
[root@rdo var(keystone_admin)]#
  • Now check your ceph pool , it will have image ( even match the glance image ID with pool objects , also compare image size with object size )
[root@rdo var(keystone_admin)]# rbd -p ceph-images ls
[root@rdo var(keystone_admin)]#

[root@rdo var(keystone_admin)]# du ubuntu-12.04.3-desktop-amd64.iso
724996   ubuntu-12.04.3-desktop-amd64.iso
[root@rdo var(keystone_admin)]#

[root@rdo var(keystone_admin)]# rados df
pool name       category                 KB      objects       clones     degraded      unfound           rd        rd KB           wr        wr KB
ceph-images     -                     724993           92            0            0           0           63           50           98       724993
ceph-volumes    -                          1            9            0            0           0          284          212           72            8
data            -                  141557761        34563            0            0           0        71843    131424295        71384    146013188
metadata        -                       9667           23            0            0           0           72        19346          851        10102
rbd             -                          1            1            0            0           0         2117        21883          305       226753
  total used       287309244        34688
  total avail     6222206348
  total space     6509515592
  • Feeling Happy , you should be , now glance will use ceph to retrieve / store images

Please Follow Ceph + OpenStack :: Part-5 for next step in installation

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