k8s-multinode-cluster

goal:

To create the k8s-multinode cluster with one master node and multiple worker/slave nodes

pre-requisite:

• Install ansible and configure the configuration file for it which is in /etc/ansible directory Refer this

[master]
3.6.37.121   ansible_user=ec2-user   ansible_ssh_private_key_file=/root/ansible.pem   ansible_connection=ssh
[slaves]
13.127.231.29		ansible_user=ec2-user   ansible_ssh_private_key_file=/root/ansible.pem   ansible_connection=ssh
13.233.198.137		   ansible_user=ec2-user   ansible_ssh_private_key_file=/root/ansible.pem   ansible_connection=ssh

• If you have to launch the ec2-instance on AWS by ansible then the IAM user with Administrator Access should be created.
• We need private key file with .pem extension to launch the ec2-instance. Take this file in your VM .
• We should have boto or boto3 package installed to do something in AWS. Use this command pip3 install boto OR pip3 install boto3

Solution:

• Download this directory in /etc/ansible/roles directory
• Configure the configuration file which is in /etc/ansible directory Refer this
• Create the yaml file for launching the ec2-instances on AWS. node.yml file

- hosts: localhost
   roles:
   - role: kube_nodes

Don’t forget to add your access key and secret key of IAM user in this file

---
# vars file for kube_nodes
access_key: "A*******************************"
secret_key: "9oFlQ5*************************cpS4johW"

• pip3 install boto OR pip3 install boto3 Install one of them which support to your OS.
• Now download this yaml file in your working directory and run it using the command ansible-playbook node.yml .

- hosts: localhost
   roles:
   - role: kube_nodes

• And then the ec2-instance will launch on AWS
• Check your public IPs and update it in this file. Don’t forget to update your private key file name also. This file should be in the /root directory as we give this path in the ansible conf file
• Now download main yml file in working directory and run it by the command ansible-playbook main_setup.yml

- hosts: master
  roles:
          - role: k8s-master1

- hosts: slaves
  vars_prompt:
          - name: join
            prompt: "Please enter the command to join worker node with master"
            private: no
  roles:
          - role: k8s-slave

• Now kubernetes multinode cluster is setup

Thank you