ConfigMaps & Secret — Kubernetes

ConfigMaps and Secrets are used to store configuration data and secrets, respectively. ConfigMaps store configuration data as key-value pairs, while Secrets store sensitive data in an encrypted form.

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1. Create a ConfigMap for your Deployment
2. Create a ConfigMap for your Deployment using a file or the command line

apiVersion: v1
kind: ConfigMap
metadata:
  name: todo-app
data:
  name: django-todo-app
  application: todo-app
  protocol: TCP

Apply the changes using

kubectl apply -f configMap.yml

Update the deployment.yml file to include the ConfigMap

apiVersion: apps/v1
kind: Deployment
metadata:
  name: config-todo-app
  labels:
    app: todo
  namespace: todo-app
spec:
  replicas: 2
  selector:
    matchLabels:
      app: todo
  template:
    metadata:
      labels:
        app: todo
    spec:
      containers:
      - name: todo
        image: trainwithshubham/django-todo:latest
        ports:
        - containerPort: 8000
        env:
          - name: TODO_APP
            valueFrom:
              configMapKeyRef:
                name: todo-app
                key: application