分布式存储ceph---openstack对接ceph存储后端（4）

ceph对接openstack环境

一、使用RBD方式提供存储，如下数据：

1、image：保存glance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

　　或者：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

如遇到如下错误：

[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

11、配置 Cinder：

vim /etc/cinder/cinder.conf

[DEFAULT]

my_ip = 192.168.11.3

glance_api_servers = http://controller:9292

auth_strategy = keystone

enabled_backends = lvm,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]

[lvm]

volume_driver = cinder.volume.drivers.lvm.LVMVolumeDriver

volume_group = cinder-vg

volumes_dir = $state_path/volumes

iscsi_protocol = iscsi

iscsi_helper = lioadm

iscsi_ip_address = 192.168.11.5

[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

12、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：