Manage a Bare Metal GPU cluster

After creating a GPU cluster, use the cluster details page to monitor nodes, resize the cluster, manage power state, configure network interfaces, and delete cluster resources.

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Access cluster details

To view and manage an existing cluster, open the cluster details page.

1. In the Gcore Customer Portal, navigate to GPU Cloud.
2. In the sidebar, expand GPU Clusters and select Bare Metal GPU Clusters.
3. Click on a cluster name to open the details page.

The cluster details page displays summary information in the header panel: The page is organized into tabs: Overview, Power, Networking, Tags, User Actions, and Delete.

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View cluster nodes

The Overview tab lists all nodes (servers) in the cluster. Each node entry shows the node name, flavor, assigned IP addresses, status, timestamps, cost, and other metadata. The table supports filtering by name, date range, and status.

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Resize a cluster

Cluster size can be adjusted after creation by adding or removing nodes. To resize a cluster:

1. On the Overview tab, click Resize Cluster.
2. Adjust the instance count using the + and - buttons.
3. Click Resize.

New nodes inherit the cluster’s original configuration defined at creation time. The maximum number of nodes is limited by the current stock availability in the selected region.

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Delete a specific node

To remove a specific node without random selection:

1. Locate the node in the cluster list.
2. Click the actions menu (three dots) on the node row.
3. Select Delete.
4. Confirm the deletion.

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Power actions

Power actions control the running state of cluster nodes. Actions can be applied to individual nodes or in bulk.

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Individual node actions

To control a single node:

1. Locate the node in the cluster list.
2. Click the actions menu (three dots) on the node row.
3. Select the desired action:
   • Power on: Start the node
   • Power off: Shut down the node
   • Soft reboot: Graceful restart of the operating system
   • Hard reboot: If soft reboot fails, force restart the node
   • Rebuild: Reinstall the original operating system image used at cluster creation. All data on local storage is deleted.

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Bulk actions

To apply actions to multiple nodes simultaneously:

1. Select nodes using the checkboxes in the nodes table.
2. Click Group actions in the toolbar.
3. Select the action to apply to all selected nodes.

Alternatively, use the Power tab to perform soft or hard reboot on all cluster nodes at once.

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Network interfaces

The Networking tab displays network interfaces for each node. Click on a node name to expand its interface details. Interface types include: For flavors with InfiniBand, multiple InfiniBand interfaces are created automatically (by default, 8 for H100 configurations). These appear as “GPU-cluster ib-subnet” entries in the interface list. Click on an interface to expand its details, including IP address, network configuration, and other network information.

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Modify network interfaces

To add network interfaces on a specific node:

1. Navigate to the Networking tab.
2. Click on a node to expand its details.
3. Click Add Interface or Add Sub-Interface.
4. Configure the interface type (public or private) and IP allocation settings as supported by the service.

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Console access

For troubleshooting or when SSH access is unavailable, use the browser-based console.

1. In the Overview tab, locate the node you want to access.
2. Click Open Console in the node row.
3. The console opens in a new browser tab using noVNC.
4. Log in using the same credentials as for SSH access.

The console provides direct terminal access to the node, useful when network connectivity issues prevent SSH access.

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Tags

Tags are key-value pairs used to organize and categorize clusters. Tags are applied at the cluster level and inherited by all nodes. To manage tags:

1. Navigate to the Tags tab on the cluster details page.
2. Enable the Add custom tags checkbox.
3. Enter the key and value for each tag.
4. Click Save changes.

Use tags for billing allocation, environment identification, or organizational purposes.

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User actions

The User Actions tab displays a log of all operations performed on the cluster, including creation, deletion, resize, power, and network actions. Use the date and action type filters to narrow results. This log is useful for auditing and troubleshooting.

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Delete a cluster

When a cluster is deleted, local NVMe storage is permanently erased; file shares and object storage remain intact. To delete a cluster:

1. Navigate to the Delete tab on the cluster details page.
2. Click Delete Cluster.
3. Confirm the deletion.

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Limitations

Current limitations for cluster management:

• Provisioning time: Bare Metal GPU servers, especially H100 configurations, may take 15-40 minutes to provision due to hardware preparation.
• Configuration immutability: Cluster-level configuration is fixed at creation time. Image, file share integration, and network settings cannot be changed after cluster creation.
• Node-level settings: Only network interfaces can be modified on individual nodes. Image and storage cannot be changed.
• Resize behavior: Scaling down removes a random node. Use per-node delete for targeted removal.
• State-based restrictions: Management actions are restricted while the cluster is in transitional states (for example, Resizing).