GlusterFS作为OpenStack后端存储

陈辉煌

　　创建3个卷images、volumes、instances分别对接openstack的glance、cinder、nova组件
　　images卷用于存放OpenStack镜像
　　volumes卷用于存放OpenStack硬盘
　　instances卷用于存放OpenStack云主机
　　1、  创建卷
gluster volume create images replica 3 \
controller1:/data/brick1/image  controller2:/data/brick1/image  compute01:/data/brick1/image \
controller1:/data/brick2/image  controller2:/data/brick2/image  compute01:/data/brick2/image \
controller1:/data/brick3/image  controller2:/data/brick3/image  compute01:/data/brick3/image
gluster volume create volumes replica 3 \
controller1:/data/brick1/volume  controller2:/data/brick1/volume  compute01:/data/brick1/volume \
controller1:/data/brick2/volume  controller2:/data/brick2/volume  compute01:/data/brick2/volume \
controller1:/data/brick3/volume  controller2:/data/brick3/volume  compute01:/data/brick3/volume
gluster volume create instances replica 3 \
controller1:/data/brick1/instance  controller2:/data/brick1/instance  compute01:/data/brick1/instance \
controller1:/data/brick2/instance  controller2:/data/brick2/instance  compute01:/data/brick2/instance \
controller1:/data/brick3/instance  controller2:/data/brick3/instance  compute01:/data/brick3/instance　　
　　2、  启动卷
gluster volume start images
gluster volume start volumes
gluster volume start instances　　3、  添加images、instances到fstab自动挂载
controller1:/images   /var/lib/glance/images   glusterfs  defaults,_netdev,backupvolfile-server=controller2,backupvolfile-server=compute01   0 0
controller1:/instances   /var/lib/nova/instances   glusterfs  defaults,_netdev,backupvolfile-server=controller2,backupvolfile-server=compute01   0 0

　　mount  -a 挂载
　　上述挂载方式使用backupvolfile起到了高可用性，避免单点故障
　　nova、glance节点要挂载到instances、images的相关目录，根据实际服务部署情况调整，cinder不太一样，下边会说到。
　　 4、  设置相关权限
chown -R nova.nova /var/lib/nova/instances
chown -R glance.glance/var/lib/glance/images
chown -R nova:nova /data/brick1/instance
chown -R nova:nova /data/brick2/instance
chown -R nova:nova /data/brick3/instance
chown -R glance:glance /data/brick1/image
chown -R glance:glance /data/brick2/image
chown -R glance:glance /data/brick3/image
chown -R cinder:cinder /data/brick1/volume
chown -R cinder:cinder /data/brick2/volume
chown -R cinder:cinder /data/brick3/volume　　nova要有instance、cinder要有volume、glance要有image的读写权限，根据节点上的服务，给相应的权限。
　　5、  配置cinder
cp /etc/cinder/cinder.conf{,.bak}
openstack-config --set/etc/cinder/cinder.conf DEFAULT volume_drivercinder.volume.drivers.glusterfs.GlusterfsDriver
openstack-config --set/etc/cinder/cinder.conf DEFAULT glusterfs_shares_config /etc/cinder/shares.conf
openstack-config --set /etc/cinder/cinder.confDEFAULT glusterfs_mount_point_base /var/lib/cinder/volumes　　
touch /etc/cinder/shares.conf
vim /etc/cinder/shares.conf  #添加以下内容
controller1:/volumes
controller2:/volumes
compute01:/volumes　　#设置相关权限
chown -R cinder.cinder/etc/cinder/shares.conf
chown -R cinder:cinder /var/lib/cinder/*　　
　　6、  重启openstack相关服务
openstack-service restart nova
openstack-service restart cinder
openstack-service restart glance　　
　　7、  验证cinder