How to start Kubernetes cluster by using Kops and Terraform

https://github.com/xjantoth/helmfile-course/blob/master/Content.md#13-materials-how-to-start-kubernetes-cluster

Generate SSH key pair:

SSH_KEYS=~/.ssh/udemy_devopsinuse

if [ ! -f "$SSH_KEYS" ]
then
   echo -e "\nCreating SSH keys ..."
   ssh-keygen -t rsa -C "udemy.course" -N '' -f $SSH_KEYS
else
   echo -e "\nSSH keys are already in place!"
fi

Export environmental variables for kops, awscli and terraform binaries:

• AWS_ACCESS_KEY_ID

• AWS_SECRET_ACCESS_KEY

• AWS_DEFAULT_REGION

export AWS_ACCESS_KEY_ID="..."
export AWS_SECRET_ACCESS_KEY="..."
export AWS_DEFAULT_REGION="eu-central-1"

env | grep AWS | sed -E  's/^(.*=)(.*)$/\1masked-output/'

Generate terraform code by executing following kops command to provision Kubernetes cluster in AWS:

kops create cluster \
--cloud=aws \
--name=course.devopsinuse.com \
--state=s3://course.devopsinuse.com \
--authorization RBAC \
--zones=eu-central-1a \
--node-count=2 \
--node-size=t2.micro \
--master-size=t2.micro \
--master-count=1 \
--dns-zone=course.devopsinuse.com \
--out=terraform_code \
--target=terraform \
--ssh-public-key=~/.ssh/udemy_devopsinuse.pub

cd terraform_code
terraform init
terraform validate            # -> thrown me some errors
terraform 0.12upgrade         # <- this command fix some of the errors
terraform validate      
sed -i 's/0-0-0-0--0/kops/g' kubernetes.tf

terraform validate            # -> this time it passed with no errors
terraform plan

Pleas run terrafrom apply command to provision Kubernetes cluster in AWS:

terraform apply

Please wait like ~10 miutes not to get upset that DNS records are not being created very fast

Install helm v3

curl --output /tmp/helm-v3.1.1-linux-amd64.tar.gz -L https://get.helm.sh/helm-v3.1.1-linux-amd64.tar.gz
sudo tar -xvf /tmp/helm3.tgz --strip-components=1 -C /usr/bin/helm3 linux-amd64/helm
sudo chmod +x /usr/bin/helm3

# In case you have no helm chart repository added
helm3 repo add stable https://kubernetes-charts.storage.googleapis.com/

# Verify your helm chart repository repo helm v3
helm3 repo list

!!! This section is only applicable if you want to use helm v2 Install helm v2

curl -L --output /tmp/helm-v2.16.5-linux-amd64.tar.gz  https://get.helm.sh/helm-v2.16.5-linux-amd64.tar.gz
sudo tar -xvf /tmp/helm-v2.16.5-linux-amd64.tar.gz --strip-components=1 -C /usr/bin/ linux-amd64/helm
sudo chmod +x /usr/bin/helm

!!! This section is only applicable if you want to use helm v2

helm version 
kubectl create serviceaccount --namespace kube-system tiller
kubectl create clusterrolebinding tiller-cluster-rule --clusterrole=cluster-admin --serviceaccount=kube-system:tiller
helm init --service-account tiller --upgrade
helm ls

Destroy your Kubernetes cluster

cd terraform_code
terraform destroy