OpenStack Train版-16.对接Ceph存储

1.Ceph集群创建OpenStack所需的存储池和用户(Ceph Mon节点)
创建OpenStack所需的存储池

ceph osd pool create volumes 128
ceph osd pool create images 128
ceph osd pool create backups 128
ceph osd pool create vms 128

rbd pool init volumes
rbd pool init images
rbd pool init backups
rbd pool init vms

同步配置文件

ssh controller tee /etc/ceph/ceph.conf </etc/ceph/ceph.conf
ssh compute01 tee /etc/ceph/ceph.conf </etc/ceph/ceph.conf
ssh compute02 tee /etc/ceph/ceph.conf </etc/ceph/ceph.conf

创建用户并授权

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'
ceph auth get-or-create client.cinder-backup mon 'profile rbd' osd 'profile rbd pool=backups'

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
ceph auth get-or-create client.cinder-backup >/etc/ceph/ceph.client.cinder-backup.keyring

同步用户秘钥并修改属主

ssh controller tee /etc/ceph/ceph.client.glance.keyring </etc/ceph/ceph.client.glance.keyring
ssh controller chown glance:glance /etc/ceph/ceph.client.glance.keyring

ssh controller tee /etc/ceph/ceph.client.cinder.keyring </etc/ceph/ceph.client.cinder.keyring
ssh controller chown cinder:cinder /etc/ceph/ceph.client.cinder.keyring
ssh compute01 tee /etc/ceph/ceph.client.cinder.keyring </etc/ceph/ceph.client.cinder.keyring
ssh compute01 chown cinder:cinder /etc/ceph/ceph.client.cinder.keyring
ssh compute02 tee /etc/ceph/ceph.client.cinder.keyring </etc/ceph/ceph.client.cinder.keyring
ssh compute02 chown cinder:cinder /etc/ceph/ceph.client.cinder.keyring

ssh controller tee /etc/ceph/ceph.client.cinder-backup.keyring </etc/ceph/ceph.client.cinder-backup.keyring
ssh controller chown cinder:cinder /etc/ceph/ceph.client.cinder-backup.keyring

2.安装ceph客户端(务必注意版本一致性)并配置libvirt秘钥(存储节点)

rpm -ivh http://mirrors.aliyun.com/ceph/rpm-luminous/el7/noarch/ceph-release-1-1.el7.noarch.rpm # L版本
# rpm -ivh http://mirrors.aliyun.com/ceph/rpm-mimic/el7/noarch/ceph-release-1-1.el7.noarch.rpm # M版本
# rpm -ivh http://mirrors.aliyun.com/ceph/rpm-nautilus/el7/noarch/ceph-release-1-1.el7.noarch.rpm # N版本
# rpm -ivh http://mirrors.aliyun.com/ceph/rpm-octopus/el7/noarch/ceph-release-1-1.el7.noarch.rpm # O版本
yum install -y ceph-common python-rbd

生成UUID，按照集群一致性，每个节点可以使用相同的UUID增加秘钥到libvirt

UUID=$(uuidgen)
echo $UUID
02aa5663-b0b5-453d-a0ce-1f24c61716c6

生成并同步secret.xml到所有计算节点(同步及增加秘钥部分略）

cat > /etc/ceph/secret.xml <<EOF
<secret ephemeral='no' private='no'>
  <uuid>${UUID}</uuid>
  <usage type='ceph'>
      <name>client.cinder secret</name>
  </usage>
</secret>
EOF

添加密钥到libvirt

virsh secret-define --file /etc/ceph/secret.xml
virsh secret-set-value --secret ${UUID} --base64 $(cat /etc/ceph/ceph.client.cinder.keyring | grep key | awk -F ' ' '{ print $3 }')

查看添加后的密钥key和value

virsh secret-list
virsh secret-get-value $UUID

3.配置Glance集成Ceph作为后端存储并验证(控制节点)

修改glance-api配置文件

vim /etc/glance/glance-api.conf
[DEFAULT]
show_image_direct_url = True
[glance_store]
stores = rbd,file,http
default_store = rbd
filesystem_store_datadir = /var/lib/glance/images/
rbd_store_pool = images
rbd_store_user = glance
rbd_store_ceph_conf = /etc/ceph/ceph.conf
#rbd_store_chunk_size = 8
[paste_deploy]
flavor = keystone

重启glance-api服务

systemctl restart openstack-glance-api.service

4.配置Cinder集成Ceph作为后端存储并验证(控制节点和存储节点)

控制节点：修改默认卷类型

vim /etc/cinder/cinder.conf
[DEFAULT]
default_volume_type = ceph

控制节点：重启cinder-api和cinder-scheduler服务

systemctl restart openstack-cinder-api.service openstack-cinder-scheduler.service

存储节点：修改后端存储

vim /etc/cinder/cinder.conf
[DEFAULT]
enabled_backends = ceph,lvm
[ceph]
volume_driver = cinder.volume.drivers.rbd.RBDDriver
volume_backend_name = ceph
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 = 02aa5663-b0b5-453d-a0ce-1f24c61716c6    # rbd_secret_uuid的值即为步骤2生成的UUID值

存储节点：重启cinder-volume服务

systemctl restart openstack-cinder-volume.service

5.配置Nova集成Ceph(计算节点)

修改配置文件

vim /etc/nova/nova.conf
[DEFAULT]
live_migration_flag="VIR_MIGRATE_UNDEFINE_SOURCE,VIR_MIGRATE_PEER2PEER,VIR_MIGRATE_LIVE,VIR_MIGRATE_PERSIST_DEST,VIR_MIGRATE_TUNNELLED"
[libvirt]
virt_type = kvm
inject_partition=-2
virt_type = kvm
images_type = rbd
images_rbd_pool = vms
images_rbd_ceph_conf = /etc/ceph/ceph.conf
disk_cachemodes="network=writeback"
rbd_user = cinder
rbd_secret_uuid = 02aa5663-b0b5-453d-a0ce-1f24c61716c6    # rbd_secret_uuid的值即为步骤2生成的UUID值

重启nova-compute服务

systemctl restart openstack-nova-compute.service

6.配置cinder备份集成Ceph(控制节点、备份服务装在控制节点即可)

修改配置文件/etc/cinder/cinder.conf 在[DEFAULT]部分，增加如下内容

[DEFAULT]
backup_driver = cinder.backup.drivers.ceph.CephBackupDriver
backup_ceph_conf = /etc/ceph/ceph.conf
backup_ceph_user = cinder-backup
backup_ceph_chunk_size = 4194304
backup_ceph_pool = backups
backup_ceph_stripe_unit = 0
backup_ceph_stripe_count = 0
restore_discard_excess_bytes = true
# 在配置参数back_driver时需要注释掉其他backup_driver的配置

修改dashboard配置文件中的OPENSTACK_CINDER_FEATURES中增加如下配置

vim /etc/openstack-dashboard/local_settings
OPENSTACK_CINDER_FEATURES = {
    'enable_backup': True,
}
# 重启httpd服务
systemctl restart httpd

启动 cinder backup服务进程并设置成开机自启动

systemctl enable openstack-cinder-backup.service
systemctl restart openstack-cinder-backup.service