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Add Storage Node as Never Schedule-able Node in Nutanix Cluster

Nutanix Add Storage Node In Nutanix cluster

Nutanix Add Storage Node In Nutanix cluster

Nutanix provides two types of node and there is special hardware series as per functionality of node like compute heavy node and storage heavy node.

If you want to add a node as “Storage Node only” and don’t want to run any VM on it as per license agreement then you have to declare that node as “Never Schedulable Node” in Nutanix cluster.

Note : Never schedule-able node functionality is available in Nutanix AHV Hypervisor only.

Never Schedulable Node : Notes

There is few notes to need consider about Never Scheduable Node

Prerequisites to Add Never Schedule-able Node in cluster

Prerequisites before add new node as Never Schedule-able Node in the Nutanix cluster :

Never Schedulable Node Configuration

After completing the prerequisites of Never Schedule-able Node Lets the to add the new node as Never Schedule-able Node in Nutanix cluster.

Step 1 : Bring that node in same subnet / VLAN network as existing Nutanix cluster in running.

Step 2 : Log in to Prism web console > Hardware > Expand cluster and lets discover node

Optional : you can discover new node through command line as well

Step 2. 1 : Log in to any Nutanix CVM in running Nutanix cluster

nutanix@cvm$ ncli cluster discover-nodes

Step 3 : Add node as Never Schedule-able Node in Nutanix cluster

nutanix@cvm$ ncli -h true cluster add-node node-uuid=uuid-of-the-node never-schedulable-node=true

Optional : Add node as Schedule-able Node in Nutanix cluster

nutanix@cvm$ ncli -h true cluster add-node node-uuid=uuid-of-the-node

How Get New node UUID ? : Follow Option 1 or 2

Option 1 : Discover new node through command

Log in to any CVM of running Nutanix cluster

nutanix@cvm$ ncli cluster discover-nodes

output

Node Position                   : A

Node Serial                     : ZMxxxxxxxxxx

Node Uuid                       : d1b9d9c3-7f6f-4cb8-bf16-f37xxxxxxxx

Rackable Unit Model             : NX-3xxx

Option 2 : Log in to local CVM of New Node.

Default Credential
userid : nutanix
Password : nutanix/4u

nutanix@cvm$ cat /etc/nutanix/factory_config.json

Note : Node_UUID will show in first line

If you no longer need a node to work as a never-schedulable node, remove the node from the cluster.

Conclusion

Nutanix fail-over cluster has capability to add and remove the both type of nodes in running Nutanix cluster without any interruption.
Nutanix Schedulable node or Never Schedule node give great flexibility to nutanix customer to use compute heavy node vs storage heavy node in Nutanix fail-over cluster.

Thanks to being @ Hyperhci Blog !

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