There is an iron gallery app that the Nautilus DevOps team was developing. They have recently customized the app and are going to deploy the same on the Kubernetes cluster.

  1. Create a namespace iron-namespace-devops

Create a deployment iron-gallery-deployment-devops for iron gallery under the same namespace you created.

:- Labels run should be iron-gallery.

:- Replicas count should be 1.

:- Selector's matchLabels run should be iron-gallery.

:- Template labels run should be iron-gallery under metadata.

:- The container should be named as iron-gallery-container-devops, use kodekloud/irongallery:2.0 image ( use exact image name / tag ).

:- Resources limits for memory should be 100Mi and for CPU should be 50m.

:- First volumeMount name should be config, its mountPath should be /usr/share/nginx/html/data.

:- Second volumeMount name should be images, its mountPath should be /usr/share/nginx/html/uploads.

:- First volume name should be config and give it emptyDir and second volume name should be images, also give it emptyDir.

Create a deployment iron-db-deployment-devops for iron db under the same namespace.

:- Labels db should be mariadb.

:- Replicas count should be 1.

:- Selector's matchLabels db should be mariadb.

:- Template labels db should be mariadb under metadata.

:- The container name should be iron-db-container-devops, use kodekloud/irondb:2.0 image ( use exact image name / tag ).

:- Define environment, set MYSQL_DATABASE its value should be database_apache, set MYSQL_ROOT_PASSWORD and MYSQL_PASSWORD value should be with some complex passwords for DB connections, and MYSQL_USER value should be any custom user ( except root ).

:- Volume mount name should be db and its mountPath should be /var/lib/mysql. Volume name should be db and give it an emptyDir.

  1. Create a service for iron db which should be named iron-db-service-devops under the same namespace. Configure spec as selector's db should be mariadb. Protocol should be TCP, port and targetPort should be 3306 and its type should be ClusterIP.
  2. Create a service for iron gallery which should be named iron-gallery-service-devops under the same namespace. Configure spec as selector's run should be iron-gallery. Protocol should be TCP, port and targetPort should be 80, nodePort should be 32678 and its type should be NodePort.

Create the yaml file, iron-gallery-setup.yaml

apiVersion: v1
kind: Namespace
metadata:
  name: iron-namespace-devops
---
apiVersion: apps/v1
kind: Deployment
metadata:
  name: iron-gallery-deployment-devops
  namespace: iron-namespace-devops
spec:
  replicas: 1
  selector:
    matchLabels:
      run: iron-gallery
  template:
    metadata:
      labels:
        run: iron-gallery
    spec:
      containers:
        - name: iron-gallery-container-devops
          image: kodekloud/irongallery:2.0
          resources:
            limits:
              memory: "100Mi"
              cpu: "50m"
          volumeMounts:
            - name: config
              mountPath: /usr/share/nginx/html/data
            - name: images
              mountPath: /usr/share/nginx/html/uploads
      volumes:
        - name: config
          emptyDir: {}
        - name: images
          emptyDir: {}
---
apiVersion: apps/v1
kind: Deployment
metadata:
  name: iron-db-deployment-devops
  namespace: iron-namespace-devops
spec:
  replicas: 1
  selector:
    matchLabels:
      db: mariadb
  template:
    metadata:
      labels:
        db: mariadb
    spec:
      containers:
        - name: iron-db-container-devops
          image: kodekloud/irondb:2.0
          env:
            - name: MYSQL_DATABASE
              value: database_apache
            - name: MYSQL_ROOT_PASSWORD
              value: "R@@tP@ssw0rd123!"
            - name: MYSQL_USER
              value: devuser
            - name: MYSQL_PASSWORD
              value: "D3v0ps@321"
          volumeMounts:
            - name: db
              mountPath: /var/lib/mysql
      volumes:
        - name: db
          emptyDir: {}
---
apiVersion: v1
kind: Service
metadata:
  name: iron-db-service-devops
  namespace: iron-namespace-devops
spec:
  type: ClusterIP
  selector:
    db: mariadb
  ports:
    - protocol: TCP
      port: 3306
      targetPort: 3306
---
apiVersion: v1
kind: Service
metadata:
  name: iron-gallery-service-devops
  namespace: iron-namespace-devops
spec:
  type: NodePort
  selector:
    run: iron-gallery
  ports:
    - protocol: TCP
      port: 80
      targetPort: 80
      nodePort: 32678

Apply the file:

thor@jumphost ~$ kubectl apply -f iron-gallery-setup.yaml
namespace/iron-namespace-devops created
deployment.apps/iron-gallery-deployment-devops created
deployment.apps/iron-db-deployment-devops created
service/iron-db-service-devops created
service/iron-gallery-service-devops created

Verify - check namespace, deployments, pods and services:

thor@jumphost ~$ kubectl get ns
NAME                    STATUS   AGE
default                 Active   14m
iron-namespace-devops   Active   65s
kube-node-lease         Active   14m
kube-public             Active   14m
kube-system             Active   14m
local-path-storage      Active   14m
thor@jumphost ~$ kubectl get all -n iron-namespace-devops
NAME                                                 READY   STATUS    RESTARTS   AGE
pod/iron-db-deployment-devops-559f689bbc-4jjjz       1/1     Running   0          108s
pod/iron-gallery-deployment-devops-9c67c8cb7-srrk9   1/1     Running   0          108s

NAME                                  TYPE        CLUSTER-IP      EXTERNAL-IP   PORT(S)        AGE
service/iron-db-service-devops        ClusterIP   10.96.107.103   <none>        3306/TCP       108s
service/iron-gallery-service-devops   NodePort    10.96.73.15     <none>        80:32678/TCP   108s

NAME                                             READY   UP-TO-DATE   AVAILABLE   AGE
deployment.apps/iron-db-deployment-devops        1/1     1            1           108s
deployment.apps/iron-gallery-deployment-devops   1/1     1            1           108s

NAME                                                       DESIRED   CURRENT   READY   AGE
replicaset.apps/iron-db-deployment-devops-559f689bbc       1         1         1       108s
replicaset.apps/iron-gallery-deployment-devops-9c67c8cb7   1         1         1       108s