Dell PowerFlex 4.6.x Administration Guide

Adding nodes to a resource group

1. On the Resource Groups page, click Add Resources and choose Add Nodes.
2. In the Duplicate Node wizard:

   1. From the Resource to Duplicate list, select a node.

      Select a node that is of the same type as the other nodes within the resource group.

   2. In the Number of Instances box, enter the number of node instances that you want to add to the resource group.

      PowerFlex Manager requires a minimum of two nodes in a NAS cluster. You can expand the cluster up to a maximum of 16 nodes.

   3. Click Next.

   4. Under PowerFlex Settings, specify the PowerFlex Storage Pool Spare Capacity setting by choosing one of the following options:

      • Recommended Spare Capacity <n>% sets the spare capacity to 1 divided by the current number of Storage Data Servers (SDSs) in the protection domain, plus the number of nodes that you want to duplicate. For example, if you have three SDSs and you want to add one more node instance, the recommended spare capacity is set to 25 percent based on the formula 1/4.
      • Current Spare Capacity <n>% sets the spare capacity to 1 divided by the current number of SDSs in the protection domain. For example, if you have three SDSs in the protection domain, the current spare capacity is set to 34 percent, based on the formula 1/3, rounded up.

   5. Under OS Settings, set the Host Name Selection to Auto-Generate, Specify at Deployment Time, or Reverse DNS Lookup.

   6. If you choose Specify at Deployment, provide a name for the host in the Host Name field. If you choose Auto-Generate, specify a template for the name in the Host Name Template field.

      For an existing resource group that was not deployed by PowerFlex Manager, the Host Name Selection option is automatically set to Specify at Deployment Time and you must type the hostname.

   7. If you are adding a node to a hyperconverged resource group, specify the Host Name Selection under SVM OS Settings and provide details about the hostname, as you did for the OS Settings.

   8. In the IP Source box, provide an IP address. For an existing resource group that was not deployed with PowerFlex Manager, the default choice is User Entered IP and the IP settings for each network default to Manual Entry. However, you can change the setting to PowerFlex Manager Selected IP.

      If the Multi-Network Selection option is selected and the IP source is PowerFlex Manager Selected IP, the IPs are assigned sequentially from all the networks of that type. If an IP cannot be assigned from any of the multiple networks of the selected type, an error is displayed. If the IP source is User Entered IP, a generic name is displayed for the IP Source setting. For example: "PowerFlex Management IP Source".

      If multi networking is not enabled and the IP source is User Entered IP, the name of the network is displayed as on the Network Settings page. If the selected IP Source setting is of Manual Entry type, the IP you entered is validated against all the networks of the selected type. An error is displayed when the IP is not validated in one of the networks.

      Under Hardware Settings, the Target Boot Device option is automatically set to Use Local Flash Storage for Dell PowerFlex for an existing hyperconverged or compute-only resource group that was not deployed by PowerFlex Manager.

   9. Under Hardware Settings, in the Node Source box, select Node Pool or Manual Entry.

      For an existing resource group that was not deployed by PowerFlex Manager, the node source defaults to Manual Entry, but you can change it to Node Pool.

   10. In the Node Pool box, select the node pool. Alternatively, if you chose Manual Entry, select the specific node in the Choose Node box.

       You can view all user-defined node pools and the global pool. Standard users can see only the pools for which they have permission.

       For an existing resource group that was not deployed by PowerFlex Manager, the Node Pool defaults to Global.

   11. Under PowerFlex Settings, specify the Fault Set for a node:
       • Select PowerFlex Manager Selected Fault Set to have PowerFlex Manager choose the fault set name based on the template settings.
       • Select fault-set-name to choose one of the fault sets in the resource group.

       You can add nodes within a fault set, but PowerFlex Manager does not allow you to add a new fault set within the same resource group. To add a new fault set, you must deploy a separate resource group with settings for the fault set you want to create.

   12. Click Next.

   13. Review the Summary page and click Finish.

       If the node you are adding has a different type of disk than the base deployment, PowerFlex Manager displays a banner at the top of the Summary page to inform you of the different disk types. You can still complete the node expansion. However, your resource group may have suboptimal performance.

       Based on the component type, the required settings and properties are displayed automatically and can be edited as permitted for a node expansion.

3. Click Save.