Install and confiure KOPS on Ubunut 18

1. install kubectl --> https://kubernetes.io/docs/tasks/tools/install-kubectl/

   curl -LO https://storage.googleapis.com/kubernetes-release/release/`curl -s https://storage.googleapis.com/kubernetes-release/release/stable.txt`/bin/linux/amd64/kubectl

   chmod +x ./kubectl

   sudo mv ./kubectl /usr/local/bin/kubectl

2. install Kops

   curl -Lo kops https://github.com/kubernetes/kops/releases/download/$(curl -s https://api.github.com/repos/kubernetes/kops/releases/latest | grep tag_name | cut -d '"' -f 4)/kops-linux-amd64

   chmod +x ./kops

   sudo mv ./kops /usr/local/bin/

3. install AWS CLI

   apt-get update

   install -y awscli

Then do as the following https://docs.aws.amazon.com/cli/latest/userguide/cli-chap-configure.html

4. configure the awscli using your AWS account "you could create free account"

aws configure

Note : the AWS user must have adminstration permission

5. create new S3 bucket to save your KOPS state "it has to be at the same KOPS region"

A. make sure that it works "ex: bucket name k8s-kops-berlin-zeineldin"

 aws s3 mb s3://k8s-kops-berlin-zeineldin

B. Enable bucker versioning

aws s3api put-bucket-versioning --bucket k8s-kops-berlin-zeineldin --versioning-configuration Status=Enabled

C. Expose ENV "to save the state of the Cluster"

export KOPS_STATE_STORE=s3://k8s-kops-berlin-zeineldin

6. Create DNS Configurations

kubernetes uses DNS for discovery inside the cluster so that you can reach out kubernetes API server from clients. create a hosted zone on Route53, say, k8s.devops.vpc. The API server endpoint will then be ex:berlin.k8s.local as (Gossip DNS)

7. Create ssh public and private keys

   ssh-keygen

it will be created in the default location which is ~/.ssh/id_rsa.pub

8. export cluster and bucket name

   export KOPS_CLUSTER_NAME=cluster.zeinedin.local

9. create KOPS Cluster

   kops create cluster --name=${KOPS_CLUSTER_NAME} --ssh-public-key="~/.ssh/id_rsa.pub" --state=${KOPS_STATE_STORE} --zones=eu-west-1a --master-size=t2.micro --node-count=2 --node-size=t2.micro

Note : if you don't have DNS configuration you could just use gossip based DNS "ie: zein.cluster.k8s.local""

kops create cluster --name=${KOPS_CLUSTER_NAME} --ssh-public-key="~/.ssh/id_rsa.pub" --state=${KOPS_STATE_STORE} --zones=eu-west-1a --master-size=t2.micro --node-count=2 --node-size=t2.micro  --topology=private --networking=calico

10. You could edit in the cluster

    kops edit cluster --name ${KOPS_CLUSTER_NAME}

11. Run the Cluster

    kops update cluster --name ${KOPS_CLUSTER_NAME} --yes

12. Make Sure that every thing works

    kops validate cluster

13. login to the master server and check the cluster

    ssh -i ~/.ssh/id_rsa admin@<Mater_Node_IP>

14. Create the 1st deployment

    kubectl run webserver --image=nginx --port= 80 -- replicas=2

15. Export the deployment

    kubectl expose deployment webserver --name web-service --type=LoadBalancer --port=80

16. check the service

    kubectl get service

check the port

17. Open the port in the KOPS Cluster Security group

18. SEE THE SERVICE FROM THE URL:PORT

19. delete the culster if you want :)

    kops delete cluster --name ${CLUSTER_NAME} --yes