otherdeployment.yaml

apiVersion: v1
kind: Namespace
metadata:
  name: regdev
---
apiVersion: v1
kind: ConfigMap
metadata:
  name: newconfig
  namespace: regdev
data:
  # props like keys
  reg_data: "reg-data-test"

  # File like keys
  conf.yaml: |
    file_data: "file-data-test"

  # More file like keys
  config.properties: |
    file_prop.data="file-prop-data-test"
---
apiVersion: apps/v1
kind: Deployment
metadata:
  name: otherdeployment
  namespace: regdev
  labels:
    team: dev
spec:
  replicas: 3
  selector: # deployment selector
    matchLabels: # deployment selects "app:frontend" pods, monitors and traces these pods
      app: myotherdeployment # if one of the pod is killed, K8s looks at the desire state (replica:3), it recreats another pods to protect number of replicas
  template:
    metadata:
      labels: # pod labels, if the deployment selector is same with these labels, deployment follows pods that have these labels
        app: myotherdeployment # key: value
    spec:
      containers:
        - name: nginx
          image: nginx:latest # image download from DockerHub
          ports:
            - containerPort: 80 # open following ports
          resources:
            limits:
              memory: 512Mi
              cpu: "1"
            requests:
              memory: 256Mi
              cpu: "0.2"
          volumeMounts:
            - name: config
              mountPath: "/config"
              readOnly: false
      volumes:
        - name: config
          configMap:
            name: newconfig
            items:
              - key: "conf.yaml"
                path: "conf.yaml"
              - key: "config.properties"
                path: "config.properties"