Run specific Pods only on specific Node

Taint the node with NO_SCHEDULE

EKS with existing eks cluster, vpc, subnets & securityGroup.

Add taints

apiVersion: eksctl.io/v1alpha5
kind: ClusterConfig

metadata:
  name: my-service-eks-xE
  region: us-east-2

vpc:
  id: "vpc-foo"  # (optional, must match VPC ID used for each subnet below)
  securityGroup: "sg-foo"  # (optional, must match VPC ID used for each subnet below)
#  cidr: "192.168.0.0/16"       # (optional, must match CIDR used by the given VPC)
  subnets:
    # must provide 'private' and/or 'public' subnets by availibility zone as shown
    private:
      us-east-2b:
        id: "subnet-foob"
#        cidr: "192.168.128.0/19" # (optional, must match CIDR used by the given subnet)

      us-east-2c:
        id: "subnet-fooc"
#        cidr: "192.168.64.0/19"  # (optional, must match CIDR used by the given subnet)

      us-east-2a:
        id: "subnet-fooa"
#        cidr: "192.168.0.0/19"   # (optional, must match CIDR used by the given subnet)

managedNodeGroups:
  - name: new-subnet-nodegroup
    instanceType: t2.medium
    desiredCapacity: 1
    maxSize: 10
    minSize: 1
    privateNetworking: true
    labels:
      role: only4appbuilds
#    taints:
#      - key: only4appbuilds
#        value: true
#        effect: NO_SCHEDULE
    tags:
      k8s.io/cluster-autoscaler/node-template/label/role: only4appbuilds
      k8s.io/cluster-autoscaler/node-template/taint/feaster: "true:NoSchedule"

Schedule a pod

add nodeSelector to make sure that the this pod is not scheduled on any other nodes

AND

add tolerations to ensure that pods are scheduled only on this node.

apiVersion: apps/v1
kind: Deployment
metadata:
  name: nginxdeployment
spec:
  replicas: 6
  selector:
    matchLabels:
      app: nginx
  template:
    metadata:
      labels:
        app: nginx
    spec:
      nodeSelector:
        role: only4appbuilds
      containers:
        - name: nginx
          image: nginx
          imagePullPolicy: IfNotPresent
      tolerations:
        - key: "onlyappbuilds"
          operator: "Equal"
          value: "true"
          effect: "NoSchedule"

.