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<!-- Begin page content -->
<div class="container">
<h3>This is how the application was deployed using kubernates on aws.<a style="float: right" href="/">back</a></h3>
<p>The github repository of the simple application I developed.</p>
<div class="well"><a href="https://github.com/gabrielpasv/gab-node-app" target="_blank">https://github.com/gabrielpasv/gab-node-app</a></div>
<p>I created a docker image and uploaded it to docker hub. I used to following Dockerfile:</p>
<div class="well">FROM node:boron <br>
# Create app directory <br>
WORKDIR /gab-node-app <br>
# Clone repo <br>
RUN git clone https://github.com/gabrielpasv/gab-node-app.git . <br>
# Install Dependencies <br>
RUN npm install <br>
EXPOSE 80 <br>
CMD [ "npm", "start" ] <br>
</div>
<p>To build the image and upload it to docker hub I used these commands:</p>
<div class="well">docker build -t gabrielpasv/gab-node-app .<br>
docker push gabrielpasv/gab-node-app
</div>
<p>Setting up the environment installing <strong>kops, kubectl, awscli</strong>. And generate keys with <strong>ssh-keygen</strong>.</p>
<p>Create a DNS domain name on aws: <strong> k8s.gabrielpasv.net</strong></p>
<div class="well">aws route53 create-hosted-zone --name k8s.gabrielpasv.net --caller-reference 5</div>
<p>Create the aws cluster with kops</p>
<div class="well">kops create cluster --name=k8s.gabrielpasv.net --state=s3://k8s-gabrielpasv-state --zones=us-east-1a --node-count=2 --node-size=t2.micro --master-size=t2.micro --dns-zone=k8s.gabrielpasv.net</div>
<p>I Validate the cluster is ready</p>
<div class="well">ubuntu@ip-172-31-17-121:~$ kops validate cluster --state=s3://k8s-gabrielpasv-state <br>
Using cluster from kubectl context: k8s.gabrielpasv.net <br>
<br>
Validating cluster k8s.gabrielpasv.net <br>
<br>
INSTANCE GROUPS <br>
NAME ROLE MACHINETYPE MIN MAX SUBNETS <br>
master-us-east-1a Master t2.micro 1 1 us-east-1a <br>
nodes Node t2.micro 2 2 us-east-1a <br>
<br>
NODE STATUS <br>
NAME ROLE READY <br>
ip-172-20-34-7.ec2.internal master True <br>
ip-172-20-35-253.ec2.internal node True <br>
ip-172-20-38-120.ec2.internal node True <br>
<br>
Your cluster k8s.gabrielpasv.net is ready <br>
</div>
<p>I created the deployment with 1 replica for the mysql and 2 for the application with load balance and I also used secrets to pass the credentials. I used these files <strong>storage.yml, pv-claim.yml, gabnodeapp-secrets.yml, gabnodeapp-db.yml, gabnodeapp-db-service.yml, gabnodeapp-web.yml, gabnodeapp-web-service.yml
</strong> </p>
<p>Check the content of each file</p>
<p> <strong>storage.yml</strong> </p>
<div class="well">kind: StorageClass <br>
apiVersion: storage.k8s.io/v1 <br>
metadata: <br>
  name: standard <br>
provisioner: kubernetes.io/aws-ebs <br>
parameters: <br>
  type: gp2 <br>
  zone: us-east-1a <br>
</div>
<p> <strong>pv-claim.yml</strong> </p>
<div class="well">kind: PersistentVolumeClaim <br>
apiVersion: v1 <br>
metadata: <br>
  name: db-storage <br>
  annotations: <br>
  volume.beta.kubernetes.io/storage-class: "standard" <br>
spec: <br>
  accessModes: <br>
  - ReadWriteOnce <br>
  resources: <br>
  requests: <br>
    storage: 8Gi</div> <br>
<p> <strong>gabnodeapp-secrets.yml</strong> </p>
<div class="well">apiVersion: v1 <br>
kind: Secret <br>
metadata: <br>
  name: gabnodeapp-secrets <br>
type: Opaque <br>
data: <br>
  gab-password: Z2FiMTIzNA== <br>
  root-password: cG9ydGFsMTIzNA== <br>
</div>
<p> <strong>gabnodeapp-db.yml</strong> </p>
<div class="well">apiVersion: v1 <br>
kind: ReplicationController <br>
metadata: <br>
  name: gabnodeapp-db <br>
spec: <br>
  replicas: 1 <br>
  selector: <br>
    app: gabnodeapp-db <br>
  template: <br>
    metadata: <br>
      name: gabnodeapp-db <br>
      labels: <br>
        app: gabnodeapp-db <br>
    spec: <br>
      containers: <br>
        - name: mysql <br>
        image: mysql:5.7 <br>
        args: <br>
          - "--ignore-db-dir=lost+found" <br>
       ports: <br>
        - name: mysql-port <br>
         containerPort: 3306 <br>
       env: <br>
         - name: MYSQL_ROOT_PASSWORD <br>
            valueFrom: <br>
              secretKeyRef: <br>
               name: gabnodeapp-secrets <br>
                key: root-password <br>
          - name: MYSQL_DATABASE <br>
            value: gabdb <br>
         - name: MYSQL_USER <br>
            value: gab <br>
          - name: MYSQL_PASSWORD <br>
            valueFrom: <br>
              secretKeyRef: <br>
                name: gabnodeapp-secrets <br>
                key: gab-password <br>
       volumeMounts: <br>
        - mountPath: "/var/lib/mysql" <br>
        name: gabnodeapp-storage <br>
     volumes: <br>
        - name: gabnodeapp-storage <br>
          persistentVolumeClaim: <br>
            claimName: db-storage <br>
</div>
<p> <strong>gabnodeapp-db-service.yml</strong> </p>
<div class="well">apiVersion: v1<br>
kind: Service<br>
metadata:<br>
  name: gabnodeapp-db<br>
spec:<br>
  ports:<br>
  - port: 3306<br>
    protocol: TCP<br>
  selector:<br>
   app: gabnodeapp-db <br>
type: NodePort<br>
</div>
<p> <strong>gabnodeapp-web.yml</strong> </p>
<div class="well">apiVersion: extensions/v1beta1 <br>
kind: Deployment <br>
metadata: <br>
  name: gabnodeapp-deployment <br>
spec: <br>
  replicas: 2 <br>
  template: <br>
    metadata: <br>
    labels: <br>
     app: gabnodeapp <br>
   spec: <br>
    containers: <br>
    - name: gab-node-app <br>
     image: gabrielpasv/gab-node-app <br>
     ports: <br>
     - name: http-port <br>
      containerPort: 80 <br>
     env: <br>
     - name: MYSQL_USER <br>
     value: gab <br>
     - name: MYSQL_PASSWORD <br>
     value: gab1234 <br>
     - name: MYSQL_DATABASE <br>
     value: gabdb <br>
     - name: APP_DB_HOST <br>
     value: gabnodeapp-db</div>
<p> <strong>gabnodeapp-web-service.yml</strong> </p>
<div class="well">apiVersion: v1 <br>
kind: Service <br>
metadata: <br>
  name: gabnodeapp <br>
spec: <br>
  ports: <br>
  - port: 80 <br>
   targetPort: http-port <br>
   protocol: TCP <br>
  selector: <br>
   app: gabnodeapp <br>
  type: LoadBalancer</div>
<p>Check running pods</p>
<div class="well">ubuntu@ip-172-31-17-121:~$ kubectl get pods <br>
NAME READY STATUS RESTARTS AGE <br>
gabnodeapp-db-q97j4 1/1 Running 0 7h <br>
gabnodeapp-deployment-1899699146-4g37c 1/1 Running 0 5h <br>
gabnodeapp-deployment-1899699146-dtxz1 1/1 Running 0 5h <br>
</div>
<p>Check deployment</p>
<div class="well">ubuntu@ip-172-31-17-121:~$ kubectl get deployments<br>
NAME DESIRED CURRENT UP-TO-DATE AVAILABLE AGE<br>
gabnodeapp-deployment    2    2    2    2    5h<br>
</div>
<p>It generates a ELB link</p>
<div class="well">ac7b01a9fb1f311e798aa021c568ee01-417161783.us-east-1.elb.amazonaws.com</div>
<p>And I created a domain for that</p>
<div class="well"> <a href="http://gab-node-app.k8s.gabrielpasv.net/">http://gab-node-app.k8s.gabrielpasv.net/</a> </div>
</div>
</div>