kubernates-ansible-aws

This repo installs 3 node Kubernetes cluster on AWS with 1 master and 2 worker

Steps to run this repo

1.Install the pre-requistes

./packages.sh

2. setup python virual env and activate it

python3 -m venv ansible

source /root/kubernates-ansible-aws/ansible/bin/activate

3 Install requirements

pip install pip --upgrade

pip install -r requirements.txt

4. Configure AWS credential - this is needed for dynamic inventory

aws configure OR EXPORT AWS_KEY_ID = XXXXXXXXXXXXX

EXPORT AWS_SECRET_KEY =XXXXXXXXXX

5. Run create Infra for launch master and worked node

ansible-playbook -i inventory create-infra.yml

6. prepare host file from dynamic inventory . Update the alias name

ansible -i ec2-k8.py worker --list | grep -v hosts | awk '{print $1 " worker"}' > files/hosts

ansible -i ec2-k8.py master --list | grep -v hosts | awk '{print $1 " master"}' >> files/hosts

7. Update new hosts in playbooks

Update host in distribute key playbook

ansible -i ec2-k8.py master --list | grep -v hosts | head -1 | awk '{print " - "$1}' >> distribute-key.yml

ansible -i ec2-k8.py worker --list | grep -v hosts | head -1 | awk '{print " - "$1}' >> distribute-key.yml

8 Disribute key on remote hosts

ansible-playbook -i inventory distribute-key.yml

9. update kube-api-server variable in playbooks

export KUBE_API_SERVER_IP=ansible -i ec2-k8.py master --list | grep -v hosts | head -1 | awk '{print $1}'

sed -ir "s/kube_api_server: ChangeMe/kube_api_server: ${KUBE_API_SERVER_IP}/g" deploy-k8-ubuntu.yml

sed -ir "s/kube_api_server: ChangeMe/kube_api_server: ${KUBE_API_SERVER_IP}/g" add-node-ubuntu.yml

10. Check ansible ping for all host

ansible -m ping -i ec2-k8.py master

ansible -m ping -i ec2-k8.py worker

11. Prepare host for k8 deployment

ansible-playbook -i ec2-k8.py configue-ubuntu-infra.yml

13. Deploy k8 cluster on master

ansible-playbook -v -i ec2-k8.py deploy-k8-ubuntu.yml

14. Check Master is up and running ok

ansible -m shell -a "kubectl get no" -i ec2-k8.py master --become

15. Update token and discovery token in add-node playbook

16. Run Add node playbook

ansible-playbook -v -i ec2-k8.py add-node-ubuntu.yml

17. Check Node is added successfully

ansible -m shell -a "kubectl get no" -i ec2-k8.py master --become

ansible -m shell -a "kubectl get po --all-namespaces" -i ec2-k8.py master --become

18 Run the flask-app pod

kubectl apply -f flask-app.yml

19 Expose Nodeport for service access

kubectl expose deployment flask-app --port=4080 --protocol=TCP --type=NodePort --name=my-service

20 Get the service port exposed

kubectl get svc NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE kubernetes ClusterIP 10.96.0.1 443/TCP 24m my-service NodePort 10.103.39.41 4080:32093/TCP 13s

21 Access service at

http://<public_ip_of_node>:<service_port>

If you dont want public ip on worker node. configure the node behind the load balancer.