set of replics of the application

inside its yaml description
* template as a set of pods
* each pod will have appropriate labels

the replica set itself has
* ? labels
* number of replics

replicaset.yaml
pod.yaml

replicaset.yaml
---
apiVersion: apps/v1
kind: ReplicaSet
metadata:
  name: my-replicaset
spec:
  replicas: 2
  selector:
    matchLabels:
      app: my-app
  template:
    metadata:
      labels:
        app: my-app
    spec:
      containers:
      - image: quay.io/testing-farm:nginx:1.12
        name: nginx
        ports:
        - containerPort: 80
...
pod.yaml
---
apiVersion: v1
kind: Pod
metadata:
  name: my-pod
  labels:
    app: my
spec:
  containers:
  - image: quay.io/testing-farm:nginx:1.12
    name: nginx
    ports:
    - containerPort: 80
...