Under the traditional IT model, the user side needs to manage networks, storage, servers, virtualization, operating systems, middleware, operating environments, data and applications. the cloud computing PaaS mode, which of the following items do users need to manage? (Multiple choice)

Neutron API components are typically installed on OpenStack network nodes.

In Huawei Cloud Stack, one of the required operations in the automated operation (AutoOps) process is to install Agent to the equipment to be operated and maintained.

In Huawei Cloud Stack, which of the following descriptions about creating a mirrored virtual machine are correct? (Multiple choice)

When the cloud server suffers catastrophic damage, such as a system crash, the cloud server cannot start normally, the cloud server fails and cannot perform any operations, etc. The user has created a snapshot of the system disk in advance and the cloud server does not have a data disk.
At this time, which of the following methods can the user take to restore the cloud server?
(Multiple choice)