ceph對接openstack環境
一、使用rbd方式提供存儲如下數據：
（1）image：保存glanc中的image；
（2）volume存儲：保存cinder的volume；保存創建虛擬機時選擇創建新卷；
（3）vms的存儲：保存創建虛擬機時不選擇創建新卷；
二、實施步驟：
（1）客戶端也要有cent用戶：
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useradd cent && echo "123" | passwd --stdin cent
echo -e 'Defaults:cent !requiretty\ncent ALL = (root) NOPASSWD:ALL' | tee /etc/sudoers.d/ceph
chmod 440 /etc/sudoers.d/ceph
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（2）openstack要用ceph的節點（比如compute-node和storage-node）安裝下載的軟件包：
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yum localinstall ./* -y
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或則：每個節點安裝 clients（要訪問ceph集群的節點）：
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yum install python-rbd
yum install ceph-common
如果先采用上面的方式安裝客戶端，其實這兩個包在rpm包中早已經安裝過了
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（3）部署節點上執行，為openstack節點安裝ceph：
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ceph-deploy install controller
ceph-deploy admin controller
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（4）客戶端執行
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sudo chmod 644 /etc/ceph/ceph.client.admin.keyring
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（5）create pools，只需在一個ceph節點上操作即可：
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ceph osd pool create images 1024
ceph osd pool create vms 1024
ceph osd pool create volumes 1024
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顯示pool的狀態
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ceph osd lspools
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（6）在ceph集群中，創建glance和cinder用戶， 只需在一個ceph節點上操作即可：
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ceph auth get-or-create client.glance mon 'allow r' osd 'allow class-read object_prefix rbd_children, allow rwx pool=images'
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'
nova使用cinder用戶，就不單獨創建了
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（7）拷貝ceph-ring， 只需在一個ceph節點上操作即可：
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ceph auth get-or-create client.glance > /etc/ceph/ceph.client.glance.keyring
ceph auth get-or-create client.cinder > /etc/ceph/ceph.client.cinder.keyring
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使用scp拷貝到其他節點（ceph集群節點和openstack的要用ceph的節點比如compute-node和storage-node，本次對接的是一個all-in-one的環境，所以copy到controller節點即可 ）
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[root@yunwei ceph]# ls
ceph.client.admin.keyring ceph.client.cinder.keyring ceph.client.glance.keyring ceph.conf rbdmap tmpR3uL7W
[root@yunwei ceph]#
[root@yunwei ceph]# scp ceph.client.glance.keyring ceph.client.cinder.keyring controller:/etc/ceph/
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（8）更改文件的權限(所有客戶端節點均執行)
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chown glance:glance /etc/ceph/ceph.client.glance.keyring
chown cinder:cinder /etc/ceph/ceph.client.cinder.keyring
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（9）更改libvirt權限（只需在nova-compute節點上操作即可，每個計算節點都做）
uuidgen
940f0485-e206-4b49-b878-dcd0cb9c70a4
在/etc/ceph/目錄下（在什么目錄沒有影響，放到/etc/ceph目錄方便管理）：
cat > secret.xml <<EOF <secret ephemeral='no' private='no'> <uuid>940f0485-e206-4b49-b878-dcd0cb9c70a4</uuid> <usage type='ceph'> <name>client.cinder secret</name> </usage> </secret> EOF
將 secret.xml 拷貝到所有compute節點，並執行：：
virsh secret-define --file secret.xml ceph auth get-key client.cinder > ./client.cinder.key virsh secret-set-value --secret 940f0485-e206-4b49-b878-dcd0cb9c70a4 --base64 $(cat ./client.cinder.key)
最后所有compute節點的client.cinder.key和secret.xml都是一樣的， 記下之前生成的uuid：940f0485-e206-4b49-b878-dcd0cb9c70a4
如遇如下錯誤：
[root@controller ceph]# virsh secret-define --file secret.xml
錯誤：使用 secret.xml 設定屬性失敗 錯誤：internal error: 已將 UUID 為d448a6ee-60f3-42a3-b6fa-6ec69cab2378 的 secret 定義為與 client.cinder secret 一同使用 [root@controller ~]# virsh secret-list UUID 用量 -------------------------------------------------------------------------------- d448a6ee-60f3-42a3-b6fa-6ec69cab2378 ceph client.cinder secret
[root@controller ~]# virsh secret-undefine d448a6ee-60f3-42a3-b6fa-6ec69cab2378
已刪除 secret d448a6ee-60f3-42a3-b6fa-6ec69cab2378
[root@controller ~]# virsh secret-list
UUID 用量
--------------------------------------------------------------------------------
[root@controller ceph]# virsh secret-define --file secret.xml
生成 secret 940f0485-e206-4b49-b878-dcd0cb9c70a4
[root@controller ~]# virsh secret-list
UUID 用量 -------------------------------------------------------------------------------- 940f0485-e206-4b49-b878-dcd0cb9c70a4 ceph client.cinder secret virsh secret-set-value --secret 940f0485-e206-4b49-b878-dcd0cb9c70a4 --base64 $(cat ./client.cinder.key)
（10）配置Glance， 在所有的controller節點上做如下更改：
vim /etc/glance/glance-api.conf
[DEFAULT] default_store = rbd [cors] [cors.subdomain] [database] connection = mysql+pymysql://glance:GLANCE_DBPASS@controller/glance [glance_store] stores = rbd default_store = rbd rbd_store_pool = images rbd_store_user = glance rbd_store_ceph_conf = /etc/ceph/ceph.conf rbd_store_chunk_size = 8 [image_format] [keystone_authtoken] auth_uri = http://controller:5000 auth_url = http://controller:35357 memcached_servers = controller:11211 auth_type = password project_domain_name = default user_domain_name = default project_name = service username = glance password = glance [matchmaker_redis] [oslo_concurrency] [oslo_messaging_amqp] [oslo_messaging_kafka] [oslo_messaging_notifications] [oslo_messaging_rabbit] [oslo_messaging_zmq] [oslo_middleware] [oslo_policy] [paste_deploy] flavor = keystone [profiler] [store_type_location_strategy] [task] [taskflow_executor]
在所有的controller節點上做如下更改
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systemctl restart openstack-glance-api.service
systemctl status openstack-glance-api.service
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創建image驗證：
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[root@controller ~]# openstack image create "cirros" --file cirros-0.3.3-x86_64-disk.img.img --disk-format qcow2 --container-format bare --public
[root@controller ~]# rbd ls images
9ce5055e-4217-44b4-a237-e7b577a20dac
**********有輸出鏡像說明成功了
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（8）配置 Cinder：
vim /etc/cinder/cinder.conf
[DEFAULT] my_ip = 172.16.254.63 glance_api_servers = http://controller:9292 auth_strategy = keystone enabled_backends = ceph state_path = /var/lib/cinder transport_url = rabbit://openstack:admin@controller [backend] [barbican] [brcd_fabric_example] [cisco_fabric_example] [coordination] [cors] [cors.subdomain] [database] connection = mysql+pymysql://cinder:CINDER_DBPASS@controller/cinder [fc-zone-manager] [healthcheck] [key_manager] [keystone_authtoken] auth_uri = http://controller:5000 auth_url = http://controller:35357 memcached_servers = controller:11211 auth_type = password project_domain_name = default user_domain_name = default project_name = service username = cinder password = cinder [matchmaker_redis] [oslo_concurrency] lock_path = /var/lib/cinder/tmp [oslo_messaging_amqp] [oslo_messaging_kafka] [oslo_messaging_notifications] [oslo_messaging_rabbit] [oslo_messaging_zmq] [oslo_middleware] [oslo_policy] [oslo_reports] [oslo_versionedobjects] [profiler] [ssl] [ceph] 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 rbd_user = cinder rbd_secret_uuid = 940f0485-e206-4b49-b878-dcd0cb9c70a4 volume_backend_name=ceph
重啟cinder服務：
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systemctl restart openstack-cinder-api.service openstack-cinder-scheduler.service openstack-cinder-volume.service
systemctl status openstack-cinder-api.service openstack-cinder-scheduler.service openstack-cinder-volume.service
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創建volume驗證：
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[root@controller gfs]# rbd ls volumes
volume-43b7c31d-a773-4604-8e4a-9ed78ec18996
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（9）配置Nova：
vim /etc/nova/nova.conf
[DEFAULT] my_ip=172.16.254.63 use_neutron = True firewall_driver = nova.virt.firewall.NoopFirewallDriver enabled_apis=osapi_compute,metadata transport_url = rabbit://openstack:admin@controller
[api] auth_strategy = keystone
[api_database] connection = mysql+pymysql://nova:NOVA_DBPASS@controller/nova_api [barbican] [cache] [cells]
[cinder] os_region_name = RegionOne [cloudpipe] [conductor] [console] [consoleauth] [cors] [cors.subdomain] [crypto]
[database] connection = mysql+pymysql://nova:NOVA_DBPASS@controller/nova [ephemeral_storage_encryption] [filter_scheduler]
[glance] api_servers = http://controller:9292 [guestfs] [healthcheck] [hyperv] [image_file_url] [ironic] [key_manager]
[keystone_authtoken] auth_uri = http://controller:5000 auth_url = http://controller:35357 memcached_servers = controller:11211 auth_type = password project_domain_name = default user_domain_name = default project_name = service username = nova password = nova
[libvirt] virt_type=qemu images_type = rbd images_rbd_pool = vms images_rbd_ceph_conf = /etc/ceph/ceph.conf rbd_user = cinder rbd_secret_uuid = 940f0485-e206-4b49-b878-dcd0cb9c70a4 [matchmaker_redis] [metrics] [mks]
[neutron] url = http://controller:9696 auth_url = http://controller:35357 auth_type = password project_domain_name = default user_domain_name = default region_name = RegionOne project_name = service username = neutron password = neutron service_metadata_proxy = true metadata_proxy_shared_secret = METADATA_SECRET [notifications] [osapi_v21]
[oslo_concurrency] lock_path=/var/lib/nova/tmp [oslo_messaging_amqp] [oslo_messaging_kafka] [oslo_messaging_notifications] [oslo_messaging_rabbit] [oslo_messaging_zmq] [oslo_middleware] [oslo_policy] [pci]
[placement] os_region_name = RegionOne auth_type = password auth_url = http://controller:35357/v3 project_name = service project_domain_name = Default username = placement password = placement user_domain_name = Default [quota] [rdp] [remote_debug] [scheduler] [serial_console] [service_user] [spice] [ssl] [trusted_computing] [upgrade_levels] [vendordata_dynamic_auth] [vmware]
[vnc] enabled=true vncserver_listen=$my_ip vncserver_proxyclient_address=$my_ip novncproxy_base_url = http://172.16.254.63:6080/vnc_auto.html [workarounds] [wsgi] [xenserver] [xvp]
重啟nova服務：
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systemctl restart openstack-nova-api.service openstack-nova-consoleauth.service openstack-nova-scheduler.service openstack-nova-compute.service openstack-nova-cert.service
systemctl status openstack-nova-api.service openstack-nova-consoleauth.service openstack-nova-scheduler.service openstack-nova-compute.service openstack-nova-cert.service
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創建虛機驗證：