Node Pools

Create Node Pool for GCE in the DuploCloud Portal

GCP Node Pools are useful when you need to schedule Pods requiring more resources than others, such as more memory or local disk space. Node Pools can be created for the DuploCloud Infrastructure with GKE Standard Cluster only.

Prerequisites

Add a Tenant, specifying the DuploCloud Plan corresponding to your GKE cluster.

Adding a Node Pool

1. In the DuploCloud Portal, navigate to Kubernetes -> Nodes.

2. Click the Node Pool tab.

3. Click Add. The Add Node Pools page displays.

4. Provide Name, Availability Zone, Instance Type, and Node Counts.

5. Click Submit.

Add Node Pool page

Scaling GKE Node Pools to Zero

When autoscaling is enabled, you can set the minimum node count to 0 allowing a GKE node pool to scale down to zero nodes when no workloads are running. Nodes are automatically recreated when workloads require capacity. A minimum node count of 0 can be configured when creating a node pool or by editing an existing node pool with autoscaling enabled.

This applies only to GKE node pools. GCE VMs and BYOH hosts cannot be scaled to zero.

Adding a Node Pool with Advanced Options

DuploCloud Portal provides additional options when configuring a Node Pool, as depicted below. To use Advanced Options select Advanced Options in the Add Node Pool page.

Add Node Pool with Advanced Options enabled

Adding a Node Pool with Accelerator Type

You can add Accelerator types for GPUs while creating a NodePool. From the Add Node Pool page, click Add Accelerator.

Accelerator Types are not available in all regions.

Configuring a Service to use an Accelerator Type

1. Add a Service.

2. In the Add Service page, click Next for Advanced Options.

3. Enter command, args, and resources in the Other Container Config field.

4. Click Create.

For additional details, refer to the documentation from Google Cloud here .

Add Service page, Basic Options

Add Service page, Advanced Options

Adding a Taint to a Node Pool

1. Add a Node Pool.

2. Select the Node Pool to which you want to add taints.

3. Click Actions and select Add Taint. The Add Taint pane displays.

4. Enter the Key/Value pair and select the Effect from the list box.

5. Click Add Taint.

For example, the following screen applies a taint to a Node Pool that has a Key/Value of dedicated=experimentalwith a NoSchedule effect.

Add Taint pane

Configuring a Service to use Taints

You need to configure the correct tolerations in the Service to schedule the Pod in a Node Pool.

To continue the examples above, create a Service with tolerations using the Other Container Config field, as depicted below.

tolerations:
  - key: dedicated
    operator: Equal
    value: experimental
    effect: NoSchedule

Configure tolerations using the Other Container Config in Add Service Advanced Options form

You can Edit or Delete a Taint by selecting the Node Pool Name, clicking the Actions menu, and selecting Edit or Delete. You edit the Node Pool using the Edit Node Pool page.

Edit Node Pools page

Viewing Node Pools

View Node Pools by clicking the Node Pool tab and selecting the Node Pool Name.

The Node Pool page

Nodes created as part of a Node Pool, are displayed in the GCE VM tab.

Taints configured to a Node Pool are displayed with a Tainted Status. Click the Tainted icon to display a window with a Taint List.

Taint List window