分类: 云计算
2015-12-16 14:29:55
http://my.oschina.net/JerryBaby/blog/376580 我翻译的官方文档,仅供参考 ^ ^。
Ceph集群:
monitor、mds、osd0 节点:openstack(controller)192.168.1.131
osd1:compute 192.168.1.132
osd2:storage 192.168.1.133
系统架构:
Important:由于这里将两套集群服务部署在了同一组节点上,所以配置过程中省略了一些关于Ceph集群的配置。
创建存储池
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# ceph osd pool create volumes 128
# ceph osd pool create images 128
# ceph osd pool create vms 128
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设置Ceph客户端认证
在OpenStack节点执行如下命令:
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# ceph auth get-or-create client.cinder mon 'allow r' osd 'allow class-read object_prefix rbd_children, allow rwx pool=volumes, allow rwx pool=vms, allow rx pool=images'
# ceph auth get-or-create client.glance mon 'allow r' osd 'allow class-read object_prefix rbd_children, allow rwx pool=images'
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为client.cinder,client.glance添加密钥文件来访问节点并改变属主:
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# ceph auth get-or-create client.glance | ssh openstack sudo tee /etc/ceph/ceph.client.glance.keyring
# ssh openstack sudo chown glance:glance /etc/ceph/ceph.client.glance.keyring
# ceph auth get-or-create client.glance | ssh compute sudo tee /etc/ceph/ceph.client.glance.keyring
# ssh compute sudo chown nova:nova /etc/ceph/ceph.client.glance.keyring
# ceph auth get-or-create client.cinder | ssh compute sudo tee /etc/ceph/ceph.client.cinder.keyring
# ssh compute sudo chown nova:nova /etc/ceph/ceph.client.cinder.keyring
# ceph auth get-or-create client.cinder | ssh storage sudo tee /etc/ceph/ceph.client.cinde.keyring
# ssh storage sudo chown cinder:cinder /etc/ceph/ceph.client.cinder.keyring
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运行nova-compute的节点nova-compute进程需要密钥文件。它们也存储client.cinder用户的密钥在libvirt。libvirt进程在Cinder中绑定块设备时需要用到它来访问集群。
在nova-compute节点创建一个临时的密钥副本:
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# uuidgen
457eb676-33da-42ec-9a8c-9293d545c337
# cat > secret.xml <
EOF
# sudo virsh secret-define --file secret.xml
# sudo virsh secret-set-value --secret 457eb676-33da-42ec-9a8c-9293d545c337 --base64 $(cat client.cinder.key) && rm client.cinder.key secret.xml
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配置Glance
编辑 /etc/glance/glance-api.conf并添加如下内容:
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[DEFAULT]
default_store = rbd
...
[glance_store]
stores = rbd
rbd_store_pool = images
rbd_store_user = glance
rbd_store_ceph_conf = /etc/ceph/ceph.conf
rbd_store_chunk_size = 8
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如果要启动镜像的写时复制功能,添加下面的 [DEFAULT] 部分:
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show_image_direct_url = True
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在openstack节点和storage节点编辑 /etc/cinder/cinder.conf配置文件并添加如下内容:
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volume_driver = cinder.volume.drivers.rbd.RBDDriver
rbd_pool = volumes
rbd_ceph_conf = /etc/ceph/ceph.conf
rbd_flatten_volume_from_snapshot = false
rbd_max_clone_depth = 5
rbd_store_chunk_size = 4
rados_connect_timeout = -1
glance_api_version = 2
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如果使用cephx验证,需要配置user和uuid:
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rbd_user = cinder
rbd_secret_uuid = 457eb676-33da-42ec-9a8c-9293d545c337
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配置Nova
为了挂载Cinder设备(普通设备或可引导卷),必须指明使用的用户及UUID。libvirt将使用期在Ceph集群中进行连接和验证:
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rbd_user = cinder
rbd_secret_uuid = 457eb676-33da-42ec-9a8c-9293d545c337
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编辑 /etc/nova/nova.conf并添加如下内容:
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[libvirt]
images_type = rbd
images_rbd_pool = vms
images_rbd_ceph_conf = /etc/ceph/ceph.conf
rbd_user = cinder
rbd_secret_uuid = 457eb676-33da-42ec-9a8c-9293d545c337
libvirt_live_migration_flag="VIR_MIGRATE_UNDEFINE_SOURCE,VIR_MIGRATE_PEER2PEER,VIR_MIGRATE_LIVE,VIR_MIGRATE_PERSIST_DEST"
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禁用文件注入。当启动一个实例的时候,nova通常会尝试打开rootfs。这时,nova注入一些数据,如密码、ssh 密钥,配置文件等到文件系统中。然而,这最好依靠元数据服务和cloud-init来完成。
在每个计算节点,编辑 /etc/nova/nova.conf 在 [libvirt] 标签添加:
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libvirt_inject_password = false
libvirt_inject_key = false
libvirt_inject_partition = -2
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重启服务
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# sudo glance-control api restart
# sudo service nova-compute restart
# sudo service cinder-volume restart
# sudo service cinder-backup restar
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从块设备引导
Ceph后端存储状况:
Ceph不支持从qcow2格式的镜像引导,所以创建一个raw格式的镜像:
创建一个可引导卷:
从可引导卷创建一个实例:
查看Ceph存储状况: