Yes. A CVM without a public IP address can only pull images from "My Images" in Image Repository but not Docker Hub images or third-party images.
A CVM without a public IP address but with Internet bandwidth can access the Internet by binding an EIP.
The selected network and subnet are where the CVM resides. You can add different CVMs to subnets in different AZs for cross-AZ disaster recovery.
All pay-as-you-go models that use cloud disks as system disks are supported.
Currently, Ubuntu 16.04 and CentOS 7.2 are supported. If you need other operating systems, submit a ticket to contact us.
You can only choose the CVMs in the same region as the cluster. But you may choose a different AZ to implement cross-AZ deployment of the cluster.
Yes. The number of pay-as-you-go CVMs cannot exceed the usage quota of the current account. For details, see CVM Overview.
When a CVM instance is terminated, the resources it contains, such as containers, will also be terminated. If the number of containers for a service drops below the expected number of running containers, the cluster will launch more containers in other CVM instances until the desired number is met.