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"

.

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