Shashikant shah

Monday, 14 December 2020

What is a ReplicaSet in Kubernetes Part-07

 What is a ReplicaSet

Replica set, also termed as rs in short, is almost same as the replication controller is, only with a single difference. The replica set are also known as next generation replication controller. The only difference between replica set and replication controller is the selector types.


Labels are use pods in pods and Selector is used in RC/RS.


ReplicaSet use Set-based operators and replicationController use Equality-based.


What is difference between match operators when use in replicaSet and replicationController.


Use sample matchLabels :


# kubectl get rs -o wide --show-labels

# kubectl get rs -o wide --show-labels


ReplicaSet use MatchExpressions operator  :-

1.“In” operator :- Search label in running Pods when found labels and add pods in replicaSet.

2.”NotIn” operator :- ignore labels.


# kubectl get rs  -o wide --show-labels


# kubectl get pods --show-labels













 


 



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