Terraform with Ansible kubeadm bootstrap cluster.
Bootstraping kubeadm kubernetes cluster using terraform and ansible.
I am using remote-exec and local-exec to demonstrate two different ways of configuring hosts.
Dependencies
- terraform
- ansible
- git
- aws account and aws cli installed
Installing
- git pull repository:
https://github.com/greenszpila/kubeadm-cluster.git - terraform init
Deploy one master and two worker nodes kubeadm 1.19 cluster
By default the resources are being deployed to the us-east-2 region.
To deploy cluster to the eu-west region:
terraform apply -var-file eu-west.tfvars
You could create your own variable file or edit the eu-west.tfvars with the following details which are self explanatory:
ec2_instance_type = "t2.large"
ami_key_pair_name = "my_key"
private_key_location = "~/location/my_key.pem"
ec2_instance_region = "ap-east-1"
then run the terraform apply -var-file yourVarFile.tfvars
SSH to the Master node
Copy and paste the auto-generated command to connect to the master node:
ssh_to_master = "ssh -i ~/coding/key_name.pem ubuntu@18.191.25.152"
Verify the worker nodes have joined the cluster successfully:
kubectl get nodes
Verify the cluster
Create a deployment named nginx:
kubectl create deployment nginx --image=nginx
kubectl expose deploy nginx --port 80 --target-port 80 --type NodePort
kubectl get services
To test that everything is working, visit one of the workers:
- http://worker_1_ip:nginx_port
- http://worker_2_ip:nginx_port
through a browser or curl on your local machine. You will see Nginx’s familiar welcome page.
Install New Relic Kubernetes integration with Pixie by following the below guide:
Verify if all pods are in running state with:
kubectl get pods -n newrelic
Clean up
terraform destroy or
terraform destroy -var-file eu-west.tfvars if the var file was used.
Delete the hosts file if you are planning to use the same directory for the future tf deployments.
rm -rf hosts