Cluster Management - Discovery and monitoring
After the
IP Availability Manager
has completed its discovery of the physical host servers, theServer Manager
dynamically discovers virtual IP addresses related to the following:- Cluster nodes — Host servers within the cluster
- Protection group — Set of servers that comprise the cluster and provide application protection
- Dependent resources — Resource such as a NIC card that is used by an application, cluster node, or protection groupWhen discovering and monitoring cluster services, theServer Managerassociates the virtual IP address with the active host. TheServer Managertakes the following steps:
- Discovers the cluster.
- Identifies the virtual IP addresses that are associated with the host and the protection groups within the cluster.
- In theIP Availability Manager, removes the virtual IP addresses from the HostAccessPoints relationship for the host.
- In theIP Availability Manager, removes the virtual IP addresses from the AgentAddressList attribute of the SNMP Agent.Thus, when theIP Availability Managerdetermines that a system that hosts a cluster is down or unresponsive, theServer Managerdiagnoses that a cluster has been impacted. TheServer Managergenerates events when a cluster node fails, when a node switches over, and when a protection group completely fails. In addition, it performs root-cause analysis to determine why the group failed.