The setup used to test the Ansible Playbooks:

• Python 3 and Ansible installed on the host machine

  • my host machine is MacOS Catalina

• 3 VMs (tested in vmware fusion) : 4 gig RAM( 2 gig min), 2 vCPUs, 32 Gig vmDisk

• Os - Ubuntu Server LTS 18.04

• The VMs must have internet access

  • master node vm - IP - 10.0.1.201/24
  • worker1 node vm - IP - 10.0.1.211/24
  • worker2 node vm - IP - 10.0.1.212/24

• Create user ansible on all the vms

• copy your ssh key on your host machine to the VMs for password-less access

  • $ ssh-copy-id [email protected]
  • $ ssh-copy-id [email protected]
  • $ ssh-copy-id [email protected]

• On each VM enable 'ansible' user for paswordless sudo:

  • sudo visudo -f /etc/sudoers.d/myoverrides This will open up /etc/sudoers.d/myoverrides file with the default editor Add this line and save.

    ansible ALL=NOPASSWD: ALL

• You are all set to run the ansible playbooks. Run the playbooks from the within the directory that contains these .yml and hosts file.

  $ ansible-playbook -i hosts kube-dependencies.yml

  $ ansible-playbook -i hosts master.yml

  $ ansible-playbook -i hosts workers.yml

• Verify the Kubernetes cluster:

Log on to the master node and run the following

• Check nodes and status of the pods kubectl get nodes kubectl get pods --all-namespaces

• Deploy ngix kubectl create deployment nginx --image=nginx kubectl expose deploy nginx --port 80 --target-port 80 --type NodePort kubectl get services

exmaple out put of kubectl get service :
NAME         TYPE        CLUSTER-IP       EXTERNAL-IP   PORT(S)        AGE
 kubernetes   ClusterIP   10.96.0.1        <none>        443/TCP        13m
 nginx        NodePort    10.110.164.192   <none>        80:30560/TCP   12s

note:  30560 is the port exposed on the worker nodes to access nginx service in this example
nginx_port=30560

To test that everything is working,
visit http://worker_1_ip:nginx_port or http://worker_2_ip:nginx_port
through a browser on your local machine. You will see Nginx’s familiar welcome page.


If you would like to remove the Nginx application, first delete the nginx service from the master node:

kubectl delete service nginx
Run the following to ensure that the service has been deleted:

kubectl get services
You will see the following output:

Output
NAME         TYPE        CLUSTER-IP       EXTERNAL-IP           PORT(S)        AGE
kubernetes   ClusterIP   10.96.0.1        <none>                443/TCP        1d
Then delete the deployment:

kubectl delete deployment nginx
Run the following to confirm that this worked:

kubectl get deployments
Output
No resources found.