We will create an S3 bucket to store Kops state. As long as we point our s3 bucket with kops state file, we can run kops command from anywhere.

Name: barry-vprofile-kops-state

We will create a Public hosted in Route53. Then we will add its NS records to our Domain registerer. My registered domain name: barrydevops.com. I will create a hostedzone with below name.

Name: kubeapp.barrydevops.com

We will be creating 4 NS values to our Registered domain as NS Record.

SSH into your kops instance with your newly created pem key.

First we will create an SSH-key which will be used for kops. Public key will be pushed to all other instances automatically.

ssh-keygen

Next we will install awscli and configure it with kopsadmin access credentials.

sudo apt update && sudo apt install awscli -y
aws configure

As per Kubernetes official documentation, we need to install kubectl and kops. Follow steps from documentation.Once installation steps are complete, run below commands to check if they are ready to use.

kops version
kubectl version --client

Next we need to verify domain we have created in Route53.

![ns-lookup](./images/ns-lookup.png)

Now we will run kops command which will create kops cluster.(Note: Don't forget to replace your domain name and s3 bucket name in the command.) Below command won't create cluster, it will create configuration of cluster.

kops create cluster --name=kube.barrydevops.com \
--state=s3:https://barry-vprofile-kops-state --zones=us-east-1a,us-east-1b \
--node-count=1 --node-size=t3.small --master-size=t3.medium \
--dns-zone=kube.barrydevops.com  \
--node-volume-size=8 --master-volume-size=8

We can create cluster with below command, we need to specify the s3 bucket we use for state config.

kops update cluster --name kube.barrydevops.com --state=s3:https://barry-vprofile-kops-state --yes --admin

After issuing thsi command, wait 10-15 minutes before validating the cluster with below command:

kops validate cluster --state=s3:https://barry-vprofile-kops-state

Validate our cluster using kubectl command

We need to create an EBS volume to store mySQL data. Use below command to create one.

aws ec2 create-volume \
--availability-zone us-east-1a \
--size 3 \
--volume-type gp2

Next, I will label the nodes with zone=us-east-1a. We need to make sure that we are running our DB pod in the same zone our EBS volume created. For this reason we will create labels for our nodes.

You can find all kubernetes manifest files by cloning this repository.Clone this repo to your ec2. Make necessary changes in files, before applying kubectl commands.

https://github.com/apotitech/kube-app

In Project-12, we have Containerized the vprofile application and push it to the DockerHub. We will use the images below with :V1 tag from DockerHub repository in our Kubernetes manifests.

Our vprofile application is using below application.properties file. We need to create Kubernetes services with the same name given in this file for application to connect them.

#JDBC Configutation for Database Connection
jdbc.driverClassName=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql:https://vprodb:3306/accounts?useUnicode=true&characterEncoding=UTF-8&zeroDateTimeBehavior=convertToNull
jdbc.username=root
jdbc.password=vprodbpass

#Memcached Configuration For Active and StandBy Host
#For Active Host
memcached.active.host=vprocache01
memcached.active.port=11211
#For StandBy Host
memcached.standBy.host=vprocache02
memcached.standBy.port=11211

#RabbitMq Configuration
rabbitmq.address=vpromq01
rabbitmq.port=15672
rabbitmq.username=guest
rabbitmq.password=guest

#Elasticesearch Configuration
elasticsearch.host =vprosearch01
elasticsearch.port =9300
elasticsearch.cluster=vprofile
elasticsearch.node=vprofilenode

Create a K8s DB deployment and service file as in given under kubernetes directory.

Create a K8s MC deployment and ClusterIP type service file as in given under kubernetes directory.Run below commands to create files:

kubectl apply -f mcdep.yml
kubectl apply -f mc-CIP.yml

Create a K8s RMQ deployment and ClusterIP type service file as in given under kubernetes directory.Run below commands to create files:

kubectl apply -f rmq-dep.yml
kubectl apply -f rmq-CIP.yml

We can check the resources created with below command:

kubectl get all

Create a K8s Application deployment and LoadBalancer type service file as in given under kubernetes directory.Run below commands to create files:

kubectl apply -f vproapp-dep.yml
kubectl apply -f vproapp-svc.yml

We will start with deleting our kubernetes services first. Then we will delete our cluster, s3 bucket, Route53 Hosted zone.

Kops delete cluster --name=kube.barrydevops.com --state=s3:https://barry-vprofile-kops-state --yes