Introduction to EKSCtl

Download:

For this project, we need to download the eksctl binary:

curl --silent --location "https://github.com/weaveworks/eksctl/releases/latest/download/eksctl_$(uname -s)_amd64.tar.gz" | tar xz -C /tmp

sudo mv -v /tmp/eksctl /usr/local/bin

Confirm the eksctl command works:

eksctl version

Enable eksctl bash-completion

eksctl completion bash >> ~/.bash_completion
. /etc/profile.d/bash_completion.sh
. ~/.bash_completion

Create an EKS cluster:

Create an eksctl deployment file (eksworkshop.yaml) use in creating your cluster using the following syntax:

cat << EOF > eksworkshop.yaml
---
apiVersion: eksctl.io/v1alpha5
kind: ClusterConfig

metadata:
  name: eksworkshop-eksctl
  region: ${AWS_REGION}
  version: "1.17"

availabilityZones: ["${AWS_REGION}a", "${AWS_REGION}b", "${AWS_REGION}c"]

managedNodeGroups:
- name: nodegroup
  desiredCapacity: 3
  ssh:
    allow: true
    publicKeyName: eksworkshop

# To enable all of the control plane logs, uncomment below:
# cloudWatch:
#  clusterLogging:
#    enableTypes: ["*"]

secretsEncryption:
  keyARN: ${MASTER_ARN}
EOF

Next, use the file you created as the input for the eksctl cluster creation.

eksctl create cluster -f eksworkshop.yaml

Test the cluster:

Confirm your nodes:

kubectl get nodes # if we see our 3 nodes, we know we have authenticated correctly

Export the Worker Role Name for use throughout the workshop:

STACK_NAME=$(eksctl get nodegroup --cluster eksworkshop-eksctl -o json | jq -r '.[].StackName')
ROLE_NAME=$(aws cloudformation describe-stack-resources --stack-name $STACK_NAME | jq -r '.StackResources[] | select(.ResourceType=="AWS::IAM::Role") | .PhysicalResourceId')
echo "export ROLE_NAME=${ROLE_NAME}" | tee -a ~/.bash_profile

Congratulations!

You now have a fully working Amazon EKS Cluster that is ready to use!