* Node Affinity ensures that pods are hosted on particular nodes.
Pod Affinity ensures two pods to be co-located in a single node.
Node Affinity :
apiVersion: v1
kind: Pod
metadata:
name: with-node-affinity
spec:
affinity:
nodeAffinity:
requiredDuringSchedulingIgnoredDuringExecution:
nodeSelectorTerms:
- matchExpressions:
- key: Kubernetes.io/e2e-az-name
operator: In
values:
- e2e-az1
Pod Affinity :
apiVersion: v1
kind: Pod
metadata:
name: with-pod-affinity
spec:
affinity:
podAffinity:
requiredDuringSchedulingIgnoredDuringExecution:
- labelSelector:
matchExpressions:
- key: security
operator: In
values:
- S1
The pod affinity rule says that the pod can be scheduled to a node only if that node is in the same zone as at least one already-running pod that has a label with key “security” and value “S1”
