By using worker groups, you can assign a pod in Kubernetes to specific nodes. When you create a custom worker group, its nodes are added a label with the group name. If you want your pod to be scheduled on a node from a specific worker group, add the node selector section with the node label to the pod's configuration file.
To create a pod that will be scheduled on a specific node
Click + Create on the Kubernetes dashboard and specify a YAML file that defines this object. For example:
apiVersion: v1 kind: Pod metadata: name: nginx labels: env: test spec: containers: - name: nginx image: nginx imagePullPolicy: IfNotPresent nodeSelector: magnum.openstack.org/nodegroup: mygroup
This manifest describes the pod
nginx that will be assigned to a node from the node group
When the pod is created, check that the hosting node belongs to the specified worker group