Query the active node of the OpenStack controller node during eBackup installation

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To query the active node of the OpenStack controller node, do as follows:
1. Log in to the OpenStack reverse proxy in SSH mode.
2. Run the su-root command and enter the password of user root as prompted to switch to user root.
3. Run the source set_env command, select openstack environment variable (keystone v3), and enter the password to import environment variables.
4. Run the cps template-instance-list --service cps cps-server command. In the command output, the node whose status is active is the active node of the controller node.

Other related questions:
Definition of control nodes?
A control node controls and monitors how data nodes store and receive data, and send process status, and provides other public functions.

Actions taken if the number of nodes exceeds the upper limit during the adding of a secondary node
This fault occurs if the model of the storage device is not detected, or the number of nodes in the license file is incorrect or exceeds the specifications. To rectify the fault, ensure the following: - That the storage device is correctly connected. Log in to the storage device as user support and check whether disk array information exists in Internet Small Computer Systems Interface (iSCSI). - That the number of nodes for each network attached storage (NAS) feature in the license file is consistent with that of configured nodes. The number of nodes for each NAS feature must be equal to or larger than that of configured nodes. - That the number of configured nodes does not exceed that of the nodes mapping to the storage device in the specifications list.

Configuration requirements for storage nodes during software installation of OceanStor 9000 V100R001C01
Configuration requirements for storage nodes during software installation of OceanStor 9000 V100R001C01: The number of storage nodes must be at least three. If multiple types of nodes exist, the number of each type of nodes must be at least three.

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