Starting and stopping nodes
You might need to stop a cluster node for hardware maintenance such as replacing some of the hardware components. For a cluster with less than six nodes, only a single node can be down or you can stop only a single node at any given point in time. For a larger cluster of up to 16 nodes, a maximum of two nodes can be down or can be stopped at any given point in time. When you stop a node, the NetBackup jobs running on the node fail over to other nodes in the cluster and the cluster services running on the node are stopped. After the hardware maintenance is complete, you need to start the node. When you start a node, the cluster services are started on the node, the node joins the cluster and can start running backup jobs.
If you stop or shut down the node where the NetBackup Flex Scale infrastructure management console (UI) is running, the infrastructure management console fails over to another node. It can take a few minutes for the management console to be up on another node.
Note:
If the loss of nodes exceeds the supported fault tolerance, either due to node failures or nodes are stopped or shut down, the cluster goes in an inconsistent state.
To stop and start a node:
- Use any one of the following options to log in using the user account that you created when you configured the cluster:
Use a user account with both Appliance Administrator and NetBackup Administrator role, or a user account with only an Appliance administrator role to log in to the NetBackup Flex Scale web interface
https://ManagementServerIPorFQDN/webuiwhere ManagementServerIPorFQDN is the public IP address, the FQDN, or the short host name that you specified for the NetBackup Flex Scale management server during the cluster configuration, and then in the left pane click Cluster Management > Infrastructure.Use a user account with an Appliance Administrator role to log in to the NetBackup Flex Scale infrastructure management UI
https://ManagementServerIPorFQDN:14161where ManagementServerIPorFQDN is the public IP address, the FQDN, or the short host name that you specified for the NetBackup Flex Scale management server during the cluster configuration, and then in the left pane click Monitor > Infrastructure.Note:
If you access the NetBackup Flex Scale infrastructure management console by using the short host name from a node, set the DNS settings (name server, domain name, and search domain) or ensure that the entry for mapping the short host name to an IP address exists in the hosts file of the node.
- Click the Nodes tab.
The list of cluster nodes is displayed.
- To stop the node, click the Actions menu (vertical ellipsis) from the right side of the row in the UI, and click Stop services.
If you are in the NetBackup Flex Scale web UI, when prompted, click Open cluster console to open the NetBackup Flex Scale infrastructure management UI in a new browser tab. In the NetBackup Flex Scale infrastructure management UI, when prompted to confirm, click Stop services.
The node status changes to unhealthy.
- To start the node, click the Actions menu (vertical ellipsis) from the right side of the row in the UI, and click Start services.
If you are in the NetBackup Flex Scale web UI, when prompted, click Open cluster console to open the NetBackup Flex Scale infrastructure management UI in a new browser tab. In the NetBackup Flex Scale infrastructure management UI, when prompted to confirm, click Start services.
The node status changes to healthy.