secret and configmap demo

https://kubernetes.io/docs/tasks/configure-pod-container/configure-persistent-volume-storage/ 

nfs for k8

https://www.youtube.com/watch?v=zmzH3xpJCGs

root@ip-172-31-44-144:~# echo -n 'username'|base64

dXNlcm5hbWU=

root@ip-172-31-44-144:~# echo -n 'password'|base64

cGFzc3dvcmQ=

file: mongo-secret.yml

======

apiVersion: v1

kind: Secret

metadata:

  name: mongodb-seret

type: Opaque

data:

   mongo-root-username: dXNlcm5hbWU=

   mongo-root-password: cGFzc3dvcmQ=

  

  note: here we added encrypted  values

  

 

file: mongo.yml

======

apiVersion: apps/v1

kind: Deployment

metadata:

  name: mongodb-deployment

  labels:

    app: mongodb

spec:

  replicas: 1

  selector:

    matchLabels:

       app: mongodb

  template:

    metadata:

       labels:

         app: mongodb

    spec:

      containers:

         - name: mongodb

           image: mongo

   ports: 

     - containerPort: 27017

   env:

    - name: MONGO_INITDB_ROOT_USERNAME

  valueFrom:

      secretKeyRef:

    name: mongodb-secret

key: mongo-root-username

- name: MONGO_INITDB_ROOT_PASSWORD

  valueFrom:

                    secretKeyRef:

       name: mongodb-secret

   key: mongo-root-password

=============

   

mongodb-service:

apiVersion: v1

kind: Service

metadata:

   name: mongodb-service

spec:

   selector:

     app: mongodb

   ports:

      - protocol: TCP

    port: 27017

targetPort: 27017

----------------

mongoexpress-deployment.yml

apiVersion: app/v1

kind: Deployment

metadata:

  name: mongo-express

  labels:

    app: mongo-express

spec:

   replicas: 1

   selector: 

    matchLabels:

    app: mongo-express

template:

   metadata:

    labels:

  app: mongo-express

   spec:

      containers:

     - name: mongo-express

   image: mongo-express

   ports:

    - containerPort: 8081

   env:

    - name: ME_CONFIG_MONGODB_ADMINUSERNAME 

      valueFrom:

         secretKeyRef:

       name: mongodb-secret

   key: mongo-root-username

    - name: ME_CONFIG_MONGODB_ADMINPASSWORD  

      valueFrom:

         secretKeyRef:

       name: mongodb-secret

   key: mongo-root-password

    - name: ME_CONFIG_MONGODB_SERVER

      valueFrom:

         configMapKeyRef:

       name: mongodb-configmap

   key: database_url    

   

   

  

  

==========

mongo-configmap.yml

apiVersion: v1

kind: ConfigMap

metatdat: 

  name: mongodb-configmap

data:

  database_url:  mongodb-service

======

  

mongo-express-service.yml

apiVersion: v1

kind: Service

metatadata:

   name: mongo-express-service

spec:

  selector:

     app: mongo-express

  type: LoadBalancer  

  ports:

    - protocol: TCP

  port: 80881

  targetPort: 8081

  nodePort: 30000