建議ubuntu 用最小安裝，RAM : 4G以上(最好用6G)
利用Devstack安裝，裡面包含了keystone, glance, nova, cinder, neutron, horizon這些模組
執行openstack
./stack.sh
如果重開後有問題，需執行下列步驟
./unstack.sh
./clean.sh
Refer to https://docs.openstack.org/devstack/latest/