mongo.yml

apiVersion: apps/v1
# Specifies the API version for this ReplicaSet configuration.
kind: ReplicaSet
# Specifies the kind of resource, which is a ReplicaSet.

metadata:
  name: mongodb
  # Assigns a name to the ReplicaSet resource.

spec:
  # Specifies the specifications for the ReplicaSet.

  selector:
    matchLabels:
      app: mongo
    # Selects pods with labels matching "app: mongo".

  template:
    # Specifies the template for creating pods.

    metadata:
      name: myapp
      # Assigns a name to the pod's metadata.
      labels:
        app: mongo
        # Labels applied to the pod.

    spec:
      # Specifies the specifications for the pod.

      containers:
      - name: mongodbcontainer
        # Assigns a name to the container.
        image: mongo
        # Specifies the Docker image to use for the container.
        ports:
        - containerPort: 27017
          # Specifies the port that the container listens on.

        env:
        - name: MONGO_INITDB_ROOT_USERNAME
          value: devdb
          # Specifies an environment variable for the container.
        - name: MONGO_INITDB_ROOT_PASSWORD
          value: devdb@123
          # Specifies another environment variable for the container.

---
# A separator to indicate the end of the previous resource configuration.

apiVersion: v1
# Specifies the API version for this Service configuration.
kind: Service
# Specifies the kind of resource, which is a Service.

metadata:
  name: mongosvc
  # Assigns a name to the Service resource.

spec:
  # Specifies the specifications for the Service.

  type: ClusterIP
  # Specifies the type of Service, which is ClusterIP.

  selector:
    app: mongo
    # Selects pods with the label "app: mongo".

  ports:
  - port: 27017
    targetPort: 27017
    # Maps incoming traffic on port 27017 to the pods' target port 27017.