Pod scheduling-2: Pod Affinity and Node Affinity
Here in this post we will be exploring in deep dive on the Node Affinity. Node Affinity is more capable alternative to node lables and selector on the Kubernetes cluster. There are three types of affinities in Kubernetes Node affinity Pod affinity Pod anti-affinity Node Affinit y meaning that the pod should only be scheduled on target nodes with specific lables, this is basically what the node selector does for example only schedule the db-pod on the size=large Then, We have Pod affinity for dictates that the pod should only be scheduled on nodes where other specific pods are already running. For example cache pod scheduled only on nodes where the webserver pods already running. In generic way we could say "Schedule Pod X ' only on where ' Pod Y". Its like Indian girl marrying boy she stay with him! This way we can reduce the network latency between the two pods which need to communication(think about web pod connects with db pods). Finally, the Pod anti-affinity ...