Terraform is an infrastructure as a code (Iac) tool that allows you to create, change, and keep infrastructure compliance. Creating multiple AWS EC2 instances is generally the need of the project or the organization when you are asked to create dozens of AWS EC2 machines in a particular AWS account, and using AWS console will take hours to do that why not automate it using Terraform and save your hours of hard work? Some of the Terraform blocks (elements) and their purpose is given below. We empower and invest in diverse technology talent to increase representation for all people, and to create higher performing enterprise organizations. In this article, we will see how to create an EC2 Instance using Terraform. Attempt to curl the returned output for the bucket_domain_name. After you click Connect, a new window will open and you can connect to an EC2 Instance. In this post, youll learn how to create EC2 instance using terraform with key pair on AWS. So let us go and do some farming in the AWS planet. If successful, you should see the following: We are connected to the MySQL RDS database. Fill out the vars.tfvars with your instance_type, (i) Login to the AWS Console < Search for EC2 < Select Launch instance < Scroll down to Instance type < Select Compare instance types, (ii) Search for the instance type you want < select and copy its name, (iv) Update your vars.tfvars with the value of the instance type, 15. Self-taught Engineer with an interest in Software/DevOps Engineering, mkdir terraform-tutorial && cd terraform-tutorial, ssh-keygen -t rsa -b 4096 -m pem -f tutorial_kp && openssl rsa -in tutorial_kp -outform pem && chmod 400 tutorial_kp.pem, terraform apply -var-file="secrets.tfvars". In this post, you learnt how to create EC2 instance using Terraform with key pair on AWS. Here is the sample Terraform Configuration file saved with *.tf extension. Terraform installed on the Ubuntu Machine. if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[300,250],'howtoforge_com-box-3','ezslot_3',106,'0','0'])};__ez_fad_position('div-gpt-ad-howtoforge_com-box-3-0'); Create a dedicated directory where you can create terraform configuration files. Using Terraform to Create EC2 and RDS Instances Inside a Custom VPC on AWS This is the architecture diagram of what we will be creating with Terraform Background Scenario: Your team. Now your folder should have all files as shown below and should look like. Create variables.tf which contains the declaration and definition of the variables. Provider:Terraform relies on plugins called providers to interact with remote systems. These configuration files are placed inside the Terraform modules. Connect to EC2 instance using putty. Thanks to HashiCorp Imagine that you need to create an AWS EC2 instance for your company or for learning purpose with your AWS free tier account. It was specifically designed as a workaround for using remote-exec provisioner. 7. Each resource block describes one or more infrastructure objects, such as virtual networks, compute instances, or higher-level components, such as DNS records. ; Obtain credential access through a worker's . Also, AWS EC2 instances are safe as initially, they grant access to them using SSH keys. Before I go any further, I think I should set the context. Dont worry!. . Set the user permissionsUnder Set permissions < Attach an existing policy < Select AdministratorAccess. The public key is used to encrypt and the private key to decrypt the data. GitHub 4. Create a project folder and open it in VS code editor. Some of them are listed below. Run the following command: Once that MySQL client is installed, lets try connecting to the RDS instance. Open VS code editor and add the Terraform (HashiCorp) extension. Now your files and code are ready for execution. I will not be covering Jenkins in-depth in this article. Terraform performs a refresh, unless explicitly disabled, and determines what actions are necessary to achieve the desired state specified in the configuration files. We are going to be creating a public and a private route table. Since this is going to be the process ofInfrastructure as a Codeparadigm. It also guarantees that what we see in the planning phase would be applied when we go for committing it. . copy the public address , select key pair name , open the SSH port (22) in security group if not enabled. mkdir terraform_ec2instance cd terraform_ec2instance/ Jenkins Steps : Connect to the AWS Lab Login into Jenkins Create the GitHub Credentials and DockerHub Credentials in Jenkins After creating the credentials, you can see the credentials saved as below Screenshot Configuration:Configuration consists of one or more arguments that are specific to the resource. And you should be good to go. Terraform configuration file would ideally have lot of elements known as blocks such as provider, resourceetcetera. What is the use of Node Pool snapshot in AKS ?. Step 3) Click on Launch Instances to create a new EC2 instance. This tutorial is a shorthand to show how to start using this tool. Create an EC2 instance on AWS using Terraform, 'access_key' & 'secret_key' of an AWS IAM User. Well, you are 100% right. When we created our EC2 instance we did not specify a Security Group so our instance will use the default Security Group for the region. Subscribe to our newsletter below to get awesome AWS learning materials delivered straight to your inbox. We are retrieving the name from the aws_key_pair resource we just created. What happens under the hood when Node.js works on tasks such as database queries? If you have any questions, please leave a comment. You can use Amazon EC2 to launch as many or as few virtual servers as you need, configure security and networking, and manage storage. Using ChatGPT to Create AWS Cloudformation & Terraform Templates Flavius Dinu Terraform from 0 to hero 7. What I love most about Terraform is that we only have to worry about defining WHAT we want to deploy and not HOW it should be deployed. Most upvoted and relevant comments will be first. So make sure intend to do so. Git 5. For example, You want to launch Ubuntu 18.04, You can find the AMI ID of Operating system, You should use this AMI ID in your terraform file to launch an EC2 Instance with Ubuntu 18.04 Launching an EC2 instance using Custom AMI: (LogOut/ DEV Community 2016 - 2023. Once complete, all of your resources should be removed. Open the file in your editor and add the following information: Go ahead and add the following code to your, Creating an Elastic IP and attaching it to the EC2 instance. Bootstrap the EC2 instance with a script that will install and start Jenkins. We can create the AWS Key Pair using the AWS Console, AWS CLI, or PowerShell. Note: You may notice that this command creates a state file on your local machine called terraform.tfstate which keeps track of the resources you have created. Through this tutorial, you learned how to use Terraform to configure AWS VPC, EC2, and RDS instances. Dont want to miss any posts from us? You can see that public IP and elastic IP is shown as same as you would expect. Create a folder called terraform-example where the HCL files will live, then change directories to that folder. Try creating an instance, choose an AMI and see the Id of the AMI and use it. So which argument do you plan to use in your next Terraform deployment? please do take a look by following this link, If you would like to give a chance to Terraform and want to learn all the bits and pieces of it. This terraform-for_each-demo folder will contain all the configuration files that Terraform needs. AWS account with Administrator Access permissions, AWS CLI installed and configured with your programmatic access credentials. This is the first command that should be run after writing a new Terraform configuration. To create the EC2 Instance, run the command terraform apply.. Lets see how to create a key pair. I would say they named this product right. Before you can use Terraform to create infrastructure, you need to initialize a working directory. Replace the and with the Access Key ID and the Secret Access key values that you obtained from the step above, 9. . Terraform contains mainly five files as main.tf , vars.tf , providers.tf , output.tf and terraform.tfvars. So it refers to the profile: defaultfor the authentication. Posted on May 15, 2022 If you would like to change your settings or withdraw consent at any time, the link to do so is in our privacy policy accessible from our home page.. Once done, you will have a private and public key file with you, Copy the content of the public key file and use that to create your key pair in AWS as shown below. Resource actions are indicated with the following symbols: Plan: 4 to add, 0 to change, 0 to destroy. Create 'terraform.tfvars' which contains the definition of access_key and secret_key variables defined in the above file. We will be using MySQL RDS for the database. vim main.tf Assuming you are still logged into the Ubuntu machine using your favorite SSH client. For creating the EC2 instance, we need ami and instance type. We will verify S3 access and the Jenkins installation with the upcoming steps. This command downloads and installs plugins for providers used within the configuration. We need a key pair to run our instance. Create a dedicated directory where we can create terraform configuration files. Step#5: Now open the terminal of VS code editor or command prompt (cmd). Also, we going to set up a VPC, creating a key pair by Terraform automatically, to connect to your EC2 instance by SSH and we going to install NGINX on our server. In simple words, its a virtual machine similar to an actual server and you can use it to deploy your application. We are using the -t option to specify the algorithm that we want it to use. You can see that Terraform is creating a single EC2 Instance and nothing else, which is exactly what you want. You can find the instructions hereInstalling Terraform CLI. Terraform outruns them for the right reasons. Login to AWS Management Console and navigate to the EC2 dashboard. Count, For_Each, and Ternary operators Steven Laszloffy in Level Up Coding Deploying a Two-Tier Structure with Terraform Cloud CI/CD Help Status Writers Blog Careers Privacy Terms About Text to speech For Linux instances, the private key allows us to securely SSH into our instance. We will cover few basic elements like what is Infrastructure as code, What is Terraform etc and setup AWS API authentication and start creating Terraform configuration files for AWS provisioning, Infrastructure as Code often referred to as IaC, is where the developer or system admins write code to achieve the end state of the infrastructure or server they desire. We need a API programmatic access for AWS. Set the user details and access typeSelect Programmatic access 4. Initialize the terraform using the, Terraform initialized successfully , now its time to run the plan command which provides you the details of the deployment. I am using "vim" as an editor to write in files, you can use an editor of your choice and copy paste the following configurations to create variables.tf, terraform.tfvars and main.tf. Now open the terminal of VS code editor or command prompt (cmd). The terraform.tfstate file is used by Terraform to map real-world resources to your configuration, keep track of metadata, and improve performance for large infrastructures. AWS generates a PEM file that you should store in a safe place. In such cases, we can use EC2 user_data feature and define a set of commands or scripts that needs to be executed during the server initialization. First, we are going to put together the variables file for Terraform. KCD Chennai 2022: A CNCF Virtual conference about Kubernetes, Cloud-native, Cloud, DevOps and Open-source In your terminal, you just have run these commands with your Access and Secret key. Log in to the Ubuntu machine using your favorite SSH client. We can use this value to connect to our instance at a later point, 18. Terraform modules can further call another child to terraform modules from local directories or anywhere in disk or Terraform Registry. You can create an SSH key and use the public key part to create a key pair on AWS as shown below. Which are ami and instance_type. Terraform configuration is written in a specific language namedHashicorp Configuration Languageand it can optionally be written in JSONas well. /* This Terraform deployment creates the following resources: resource "aws_internet_gateway" "internet_gateway" {, resource "aws_default_route_table" "default_route" {, resource "aws_iam_instance_profile" "ec2_instance_profile" {, resource "aws_iam_role_policy" "ec2_role_policy" {, # Create EC2 Security Group and Security Rules, resource "aws_security_group" "jenkins_security_group" {, resource "local_file" "private_key_pem" {, ssh -i ec2-user@, https://pkg.jenkins.io/redhat-stable/jenkins.repo, https://pkg.jenkins.io/redhat-stable/jenkins.io.key, https://www.linkedin.com/in/brine-ndam-ketum-6ab435231. Execute the terraform plancommand and it would present some detailed info on what changes are going to be made into your AWS infra. Set the user details and access typeSelect Programmatic access, 4. Once we have the final configuration file, create a terraform file main.tf and paste the content of it. This is going to contain 3 parts: We will be creating a new key pair in our terraform directory. This command returns the output from our terraform.tfstate file in a human-readable format. Docker 2. When we execute the above command, we can see that 1 new resource has been added and 0 has been destroyed in the output. document.getElementById("ak_js_1").setAttribute("value",(new Date()).getTime()); Get awesome AWS learning material delivered straight to your inbox. When it is finished, you should see a success message. You would have to create a new API key. Thanks for keeping DEV Community safe. Once variables.tf file is created, We need to change values assigned to variable. So are you ready? As it deletes whatever you created. To destroy the resource use below command and Type " Yes ". If you in the learning path. First, we will need to install the MySQL client. So now, we should go and create these access and secret keys for your AWS account. Now that the variables have been declared, let's go ahead and set up our secrets file. Time to create the security groups! Create 'main.tf' which is responsible to create an EC2 on to AWS. Now that the subnets have been created, we can go ahead and create the route tables. Navigate to that path where you created the main.tffile and run theterraform initcommand. Besides that, you should also monitor this line every time you run this command to make sure that no unintended result happen. Amazon Elastic Compute Cloud (Amazon EC2) provides the scalable capacity in the Amazon Web Services (AWS) Cloud. Fill out the vars.tfvars with your aws_region, Choose your AWS region from the following list https://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/Concepts.RegionsAndAvailabilityZones.html, Update your vars.tfvars with the value of the selected region, 13. Now that everything else has been set up, we are ready to set up the EC2 instance. Now that we have defined both the variables and secrets, lets start creating our config file. In the next post we learn how to use Pulumi to create an EC2 instance. Amazon EC2 enables you to scale up or down the computations such as memory or CPU when needed. The input file for terraform is known as Terraform Configuration. Sometimes while doing a modification to the existing resources, Terraform would have to destroy the resource first and recreate it. Search for AWS IAM 3. Terraform commands terraform init terraform plan terraform apply All executed successfully. we have a dedicated article that talks about this in detail. Also depending on your region, you need to provide the AMI Id that will be used to create an instance. Terraform is an open-sourceinfrastructure as codesoftware tool created by HashiCorp. We are giving full permissions here but the best practice is to follow the Principle of Least Privilege (POLP) and give our user only the permissions needed to create an EC2 instance. Now that the EC2 instance has been created, we can create the Elastic IP and attach it to the EC2 instance. Developers can create an Amazon EC2 instance to test software in a development or staging environment, or to deploy software to production. Once unsuspended, kcdchennai will be able to comment and publish posts again. Please read the same here, Terraform AWS EC2 user_data example aws_instance| Devops Junction. With you every step of your journey. I will also demonstrate how to create a private S3 bucket for our Jenkins artifacts and allow access from our EC2 using an Instance Profile. Your email address will not be published. Provide the provider information (we are using AWS). A better way . Install and configure AWS CLI Tool: How to Install and Use AWS CLI on Linux Don't forget to configure AWS Access Key ID and Secret Access Key as shown on the installation guide. In order to do this, The Simplest way is to download and setup AWS CLI, You can refer to this document how to setup AWS CLI. Once the command completes, you should see an output similar to below: We will verify the successful state of our deployment in a few ways. When you execute the terraform applycommand the changes would be applied to the AWS Infra. For any Consultation or to hire us [emailprotected], Signup for Exclusive "Subscriber-only" Content, Infrastructure as Code is getting all attention it deserves and everyone is trying to find their way to the `Completely automated Infrastructure Provisioning & Management` While there are a lot of tools available now in the market starting from Terraform, AWS CloudFormation, Chef, Puppet, Salt Stack There are some differences, In this article, we are going to see a quick packer aws example setup and provide the steps to create an AWS Image (AMI) using Packer and we are also going to Create Amazon EC2 Instance ( Elastic Bean Stack - EBS) from the same AMI Image we have created,, AWS CLI is a very great help when it comes to efficiently managing your AWS Cloud Infrastructure and your EC2 instances. We will be running our EC2 instance on Ubuntu 20.04. How to create Secrets in AWS Secrets Manager using Terraform in Amazon account.