分布式存储ceph——（2）openstack对接ceph存储后端
ceph对接openstack环境
一、使用rbd方式提供存储如下数据：
（1）image：保存glanc中的image；
（2）volume存储：保存cinder的volume；保存创建虚拟机时选择创建新卷；
（3）vms的存储：保存创建虚拟机时不选择创建新卷；
二、实施步骤：
（1）客户端也要有cent用户：
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
（2）openstack要用ceph的节点（比如compute-node和storage-node）安装下载的软件包：
yum localinstall ./* -y
或则：每个节点安装 clients（要访问ceph集群的节点）：
yum install python-rbd yum install ceph-common 如果先采用上面的方式安装客户端，其实这两个包在rpm包中早已经安装过了
（3）部署节点上执行，为openstack节点安装ceph：
ceph-deploy install controller ceph-deploy admin controller
（4）客户端执行
sudo chmod 644 /etc/ceph/ceph.client.admin.keyring
（5）create pools，只需在一个ceph节点上操作即可：
ceph osd pool create images 1024 ceph osd pool create vms 1024 ceph osd pool create volumes 1024
显示pool的状态
ceph osd lspools
（6）在ceph集群中，创建glance和cinder用户， 只需在一个ceph节点上操作即可：
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用户，就不单独创建了
（7）拷贝ceph-ring， 只需在一个ceph节点上操作即可：
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
使用scp拷贝到其他节点（ceph集群节点和openstack的要用ceph的节点比如compute-node和storage-node，本次对接的是一个all-in-one的环境，所以copy到controller节点即可 ）
[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/
（8）更改文件的权限(所有客户端节点均执行)
chown glance:glance /etc/ceph/ceph.client.glance.keyring chown cinder:cinder /etc/ceph/ceph.client.cinder.keyring
（9）更改libvirt权限（只需在nova-compute节点上操作即可，每个计算节点都做）
uuidgen
940f0485-e206-4b49-b878-dcd0cb9c70a4
在/etc/ceph/目录下（在什么目录没有影响，放到/etc/ceph目录方便管理）：
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
将 secret.xml 拷贝到所有compute节点，并执行：：
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节点的client.cinder.key和secret.xml都是一样的， 记下之前生成的uuid：940f0485-e206-4b49-b878-dcd0cb9c70a4
如遇如下错误：
[root@controller ceph]# virsh secret-define --file secret.xml
错误：使用 secret.xml 设定属性失败
错误：internal error: 已将 UUID 为d448a6ee-60f3-42a3-b6fa-6ec69cab2378 的 secret 定义为与 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
已删除 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节点上做如下更改：
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节点上做如下更改
systemctl restart openstack-glance-api.service systemctl status openstack-glance-api.service
创建image验证：
[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 **********有输出镜像说明成功了
（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
重启cinder服务：
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
创建volume验证：
[root@controller gfs]# rbd ls volumes volume-43b7c31d-a773-4604-8e4a-9ed78ec18996
（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]
重启nova服务：
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
创建虚机验证：
