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terraform-ansible-k8s-automation's Introduction

Terraform and Ansible

We are using terraform for provisioning the intrstructure which include; VPC, Internet Gateway, RT, Servers (Ansible, Jenkins)

Ansible Installation

# Create a REDHAT EC2 instance in aws cloud and assigned IAM roles
AmazonEC2FullACCESS
AmazonVPCFullACCESS
$ sudo useradd ansible
$ echo "ansible  ALL=(ALL) NOPASSWD:ALL" | sudo tee /etc/sudoers.d/ansible
$ sudo su - ansible
# Enable PassowrdLogin and assign password to ansible user
$ sudo yum install python3 -y
$ sudo alternatives --set python /usr/bin/python3
# Install pip package manager for for python 
$ sudo yum -y install python3-pip -y
$ pip3 install ansible --user
# install boto aws python SDK use to manages resources in aws cloud
$ pip3 install boto3 --user

Infrastructure As A Code -

Terraform Installation

$ sudo su ansible
 sudo yum install wget git unzip -y
 wget https://releases.hashicorp.com/terraform/0.12.26/terraform_0.12.26_linux_amd64.zip
 sudo unzip terraform_0.12.26_linux_amd64.zip -d /usr/local/bin/
 #Export terraform binary path temporally
 export PATH=$PATH:/usr/local/bin
#Add path permanently for current user.By Exporting path in .bashrc file at end of file.
$ vi .bashrc
   export PATH="$PATH:/usr/local/bin"
# Source .bashrc to reflect for current session
 source ~/.bashrc   

Clone terraform and ansible scripts

 git clone https://github.com/LandmakTechnology/Terraform-Ansible-k8s-Automation.git
 cd terraform-ansible-k8s-automation
Update Your Key Name in variables.tf file before executing terraform script

Infrastructure As A Code - Terraform

Create the intrstructure (VPC, Subnets, Route Tables, IGW, EC2 Instances, etc)
# Initialise to install plugins
$ terraform init terafrom_scripts/
# Validate teffaform scripts
$ terraform validate terafrom_scripts/
# Plan terraform scripts which will list resouce which will be created
$ terraform plan terafrom_scripts/
# Apply to create resources
$ terraform apply --auto-approve terafrom_scripts/

Configuration Management Using Ansible with Dynamic Inventory

Check if Dynamic Inventory script is working

$ chmod +x DynamicInventory.py
$ ./DynamicInventory.py
# Ansible command to setup k8s cluste using DynamicInventory.

###### <span style="color:red">Replace \<Pemfile> with your pemfile path in server </span>
```sh
$ ansible-playbook -i DynamicInventory.py site.yml -u ubuntu --private-key=<PemFilePath>  --ssh-common-args "-o StrictHostKeyChecking=no"

Destroy Infrastructure

$ terraform destroy --auto-approve terafrom_scripts/

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