How I can define which microservice need to deploy in which node in kubernetes cluster?. Do I need to specify in Pod ? Or Any other definition ?

• As said in other answers you don't need to do this, but you can if there is any reason to do so using deprecated nodeSelector or preferable affinities. They are well worth the time to read since you can have some pods relating to specific services/microservices group together or away from each other across available nodes to allow for more flexible and resilient architecture and proper spread out. This way you are helping scheduler deciding where to place what to achieve desired layout. For most basic needs previously mentioned resource allocation can do the trick but for any fine graining you have affinity (and anti affinity) at your disposal. Documentation detailing this is here: https://kubernetes.io/docs/concepts/configuration/assign-pod-node/