1.compute节点上安装Ocata，openstack-nova-compute组件无法安装上，报错Requires: qemu-kvm-rhev >= 2.9.0 解决方法： 在compute节点上执行：
echo "
[Virt]
name=CentOS-$releasever - Base
baseurl=http://mirrors.163.com/centos/7.6.1810/virt/x86_64/kvm-common/
gpgcheck=0
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7
">> /etc/yum.repos.d/CentOS-Base.repo
再次执行安装即可：
yum -y install openstack-selinux python-openstackclient yum-plugin-priorities openstack-nova-compute openstack-utils ntpdate
2.主机节点启动后，如果dashboard中获取卷失败 排查、解决办法： controller1节点上
systemctl status openstack-cinder-api.service openstack-cinder-scheduler.service
发现进程全部为dead状态，启动之，保险起见还是再次设置为开机启动，查看状态
systemctl start openstack-cinder-api.service openstack-cinder-scheduler.service
systemctl enable openstack-cinder-api.service openstack-cinder-scheduler.service
systemctl status openstack-cinder-api.service openstack-cinder-scheduler.service
cinder节点上
systemctl status openstack-cinder-volume.service target.service lvm2-lvmetad.service
发现进程全部为dead状态，同样启动、开机启动、再次查看状态
systemctl start openstack-cinder-volume.service target.service lvm2-lvmetad.service
systemctl enable openstack-cinder-volume.service target.service lvm2-lvmetad.service
systemctl status openstack-cinder-volume.service target.service lvm2-lvmetad.service
相关日志： controller1节点 /var/log/cinder/api.log /var/log/cinder/cinder-image.log /var/log/cinder/schedular.log cinder节点 /var/log/cinder/volume.log 再次在dashboard中查看卷状态，为正常。
3.重启节点后，虚机不能DHCP动态获悉IP地址 由于neutron主节点部署在controller1上，在controller1上查看dhcp-agent状态
openstack service list
neutron agent list
均无错误，查看dhcp-agent日志
tail -f /var/log/neutron/dhcp-agent.log
实在不行就看看时间是否同步，时间不同步肯定不给分发IP
