Taints for EKS Nodes
Manage taints for EKS nodes in the DuploCloud Portal
Taints influence Kubernetes workload scheduling by marking nodes with specific conditions that certain Pods must tolerate to be scheduled on those nodes. Taints ensure that only compatible workloads run on a node, which can be useful for restricting access to certain resources, isolating environments, or managing resource usage.
Kubernetes can automatically add taints to nodes, for example, when a node becomes unreachable or has health issues, Kubernetes may apply a taint to prevent new workloads from being scheduled there. Certain workloads might require a specific configuration, so taints help ensure only compatible resources are used.
In addition to these automatic taints, you can control workload distribution by manually adding taints to EKS nodes or agent pools in the DuploCloud Portal.
Managing Taints on EKS Nodes
In DuploCloud, you can assign Kubernetes taints to EKS worker nodes to control how workloads are scheduled. Taints can be added during node creation or managed later from the node's detail page.
Adding Taints During Node Creation
When in the DuploCloud Portal, click the Add Taint button at the bottom right of the Advanced Options section. The Add Taint pane displays.
Complete the following fields:
Click Add Taint. The taint is added to the node.
Adding Taints After Node Creation
To add a taint to an existing node:
Navigate to Kubernetes -> Nodes
Select the correct tab (EC2, ASG, etc.).
Click the Name of the node to open its details page.
You can view the taints applied to a node from the Status column in the Nodes list, or from the Taints tab on the Node details page.
Viewing Taints from the Node List
Navigate to Kubernetes -> Nodes.
Look for the Tainted status under the Status column.
Click on the Tainted status for any node to open a list of taints applied to that node.
Viewing Taints from the Node Details Page
Navigate to Kubernetes -> Nodes.
Click on the node in the NAME column.
Select the Taints tab. The Taints tab displays the key, value, and effect of each taint applied to the node.
Editing or Deleting Taints
Navigate to Kubernetes -> Nodes.
Click on the node in the NAME column.
