The host must belong to the cluster and be open before you can close it. Only administrators can open and close hosts.
You may need to run egosetsudoers.sh on the host running the Platform Management Console processes to be able to open and close hosts from the Platform Management Console.
You can close a host without removing it from the cluster if you need to run diagnostic tests or troubleshoot. It can then be opened again from the Platform Management Console. Closed hosts do not accept new workload, but they do continue to run existing work. Close a host so that you can perform maintenance on it and return it to the cluster.
Once a host is closed, EGO does not re-allocate it. Closing a host does not change its allocation status. If the host is currently allocated to a consumer, the host remains allocated until the consumer returns it voluntarily. If the host is not currently allocated to a consumer, the host remains in its unallocated state.
If you use filter settings to display hosts in a specific state, the host may not display in the list. Change your filter settings to display hosts in the state you want.
You can open the host again at any time. A closed host does not accept any additional requests until it is opened again. The host still belongs to the cluster but now its state is Closed.