Cluster management vip, Monitoring the cluster – HP VMA-series Memory Arrays User Manual
Page 54
54
AM456-9007B Rev 02
HP VMA SAN Gateway Installation and User Guide
Cluster Management VIP
A typical HP VMA SAN Gateway cluster consists of one or more HP VMA SAN
Gateways, one of which is designated as the master node and one more which is
designated as the standby node. All other nodes in the vCLUSTER are considered
“normal” nodes.
The cluster management VIP, a virtual IP address, provides access to the cluster,
enabling administrators to manage and monitor all nodes of the management
cluster. This VIP is defined during initial configuration of the HP VMA SAN
Gateway management cluster and is assigned to the master node; if the master node
fails, the standby node replaces it and becomes the master node, and cluster
management traffic is automatically redirected to the new master node. A new
standby node will be elected from the remaining normal nodes.
Every HP VMA SAN Gateway in a cluster is defined by its node role (master,
standby, or normal):
•
Master Node: The master node is the primary node for managing the
Gateway vCLUSTER. The cluster management VIP is assigned to the master
node.
•
Standby Node: The second node configured in the cluster is automatically
designated as the standby node. The standby node is an active node that
performs services like the other nodes in the cluster. If the master node fails,
the standby node replaces it and becomes the master node, and cluster
management traffic is automatically redirected to the new master node.
•
Normal Node: Any additional cluster members are called normal nodes.
By using the cluster management VIP, you can ensure a reliable connection to the
current master node for all management activities.
Monitoring the Cluster
To monitor the nodes in an HP VMA SAN Gateway cluster, you can use the
show
cluster
commands in the CLI or the Gateways page in the Administration
section of the VMA Web Interface.
A very useful command is
show cluster global brief
, which may be used
on any HP VMA SAN Gateway in the cluster. For descriptions of the
show
cluster
commands and other cluster management commands, see