terraform ec2 instance user data example

Back in the AWS console, we can see that the instance has been terminated. Terraform code is written in HCL (HashiCorp COnfiguration Language), which is a declarative language. eval(ez_write_tag([[468,60],'thedevcoach_co_uk-large-mobile-banner-2','ezslot_5',118,'0','0']));Every resource in Terraform documents the values that they “output”—here’s the output values of an EC2 instance in Terraform. For more information, see Step 1: Launch an Instance. data – To Collect data from the remote provider and save it as a data source . For this tutorial you should already have an AWS account set up with both EBS and EC2 services. You signed out in another tab or window. Now, with the right permissions we can install httpd (using yum, the package manager which is installed on the AWS AMI). By default Terraform creates Spot Instance Requests with a persistent type, which means that for the duration of their lifetime, AWS will launch an instance with the configured details if and when the spot market will accept the requested price. In the output block we are giving a name to our output (like you would name a variable). You must also have permissions to create or use the resources that are created or associated with the instance. Quick Tutorial: Attach an EBS Volume to an EC2 Instance Using Terraform Below is a brief tutorial showing a common deployment task, attaching an EBS volume to an EC2 instance. Resource: aws_spot_instance_request. We create our website as a small HTML string, and outputting it to the /var/www directory—which is the default location for files on an apache web server. If you’re in a rush and you’re just looking for a snippet to copy, here it is…. By default, AWS does not allow any incoming or outgoing traffic from an EC2 Instance. Lambda Extensions: What Are They, And Should You Care? Stick with your learning though, it does eventually get clearer the more you experiment. Terraform is a great tool to add to your DevOps tool belt! Firstly, our underlying EC2 image itself doesn’t have apache (our web server of choice) installed on it. provider.tf You could pass any script that you want to run as an initial deployment on your EC2 instance and with Terraform, you can do that too. The 3 Main Use Cases. Plan your terraform configuration by copying in the EC2 resource from above, and execute a terraform plan. Port 8080 is working, BusyBox is running Uncomment user_data parameter in terraform config. Example Usage data "aws_iam_user" "example" {user_name = "an_example_user_name"} Argument Reference. lets create an ec2 instance manually using aws console In our script we install Apache, create a basic web page and then start apache. Terraform offers a data source for cloudinit which is really useful for bootstrapping EC2 instances with an initial configuration. I hope this article has given you some insight into how powerful Terraform is and how you can create a Terraform EC2 instance. First Terraform Script to deploy Ec2 Instance user_data aws_instance terraform aws tutorial Congratulations! Terraform launch configuration user data. If you want a simple value you can give the user_data argument a string literal, but in most cases it’s complex enough that you either want to use the file () function, or the template_file data source if you need to interpolate values. This odd looking character collection is a shebang. I'm a Cloud Native Software Engineer From London. To invoke a local process, see the `local-exec` provisioner instead. We will be working with following files: cloudinit.tf instance.tf key.tf provider.tf scripts securitygroup.tf terraform.tfvars vars.tf vpc.tf We will go through each script explaining what particular directives eval(ez_write_tag([[300,250],'thedevcoach_co_uk-leader-2','ezslot_6',125,'0','0']));I hope this article helped point you in the right direction with the different nuances of the setup, sometimes it can be quite overwhelming with the amount of prior knowledge that you need to do something as simple as launching an EC2. And that concludes our walk through of how to create a super simple EC2 instance on AWS with Apache. C. Add initial deployment with user_data. ... for example, to IP ranges for a specific VPN. Fig 1.8 ec2 instance is instantiated in Running State. Or, you can specify additional parameters that are not in the launch template. After typing yes, Terraform will begin tearing down the EC2 instance. Use this data source to get IDs or IPs of Amazon EC2 instances to be referenced elsewhere, e.g. IMPORTANT This module by-design does not provision an AutoScaling group. We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites. In Terraform you can use connection keyword to ssh in EC2 instance.I have attached one example for your reference. What are you intending to build on your EC2? Then it attaches the existing settings of the instance, as described by the EC2 API, to the name aws_instance.example of a module. Available values: default, dedicated, host. When you’ve checked that your terraform plan didn’t output anything unexpected, go ahead and execute a terraform apply to launch your instance. Create EC2 instance with Terraform – Terraform EC2. AWS : Creating an EC2 instance and attaching Amazon EBS volume to the instance using Python boto module with User data AWS : Creating an instance to a new region by copying an AMI AWS : S3 (Simple Storage Service) 1 AWS : S3 (Simple Storage Service) 2 - Creating and Deleting a Bucket AWS : S3 (Simple Storage Service) 3 - Bucket Versioning use the lookup function to pass a map output to a variable as an input. BogoToBogo And Your Main Options For Learning Cloud. Create and attach a additional drive. Terraform reported that it had created two new resources (the EC2 instance and the Security Group) and on testing: The web_port and user_data options worked. Join The Cloud Native Software Engineering Newsletter. For example: Sponsor Open Source development activities and free contents for everyone. This is used to store the AWS access and secret key securely. Every week I post a new Cloud Native article and every month I publish the Cloud Native Software Engineering Newsletter. In our case our name is DNS and we’re pointing our variable to a returned values of our instance, in our case the public DNS entry. Create Ec2 instance With Terraform. You must also configure your security group to allow SSH (port 22), HTTP (port 80), and HTTPS (port 443) connections. Now let’s move onto the practicalities of executing it, and what you should see in AWS when you’ve executed your configuration. For more information about these prerequisites, see Setting Up with Amazon EC2. The Terraform Instance. To Add your SSH key to the instance: Add your SSH key to EC2 instance and access it via SSH. When you launch an instance using a launch template, you can override parameters that are specified in the launch template. Here is quick tutorial on how Jake created an EC2 instance with Cloudwatch Alarm Metrics using Terraform. Specifying user-data in Terraform¶ Giving an EC2 instance user-data in Terraform is quite easy. How To Test AWS Lambda: Everything You Need To Get Started. And How To Speed Up Your Learning. Feel free to change the instance size if you want or need greater performance. If you use an AWS API in a user data script, yo… The configuration is dependent on the type, and is documented for each data source in the providers section. I created The Dev Coach to make it easier for Software Engineers to get into Cloud Native. (The Terraform CDK). And there you have it, a super simple web server, launched on EC2 in AWS with Apache. In part one, we’ll go through our configuration, and what we’ve written and why — there’s a surprising amount going on when you dig into it. That should hopefully cover enough to get you going with the AWS instance resource configuration block, let’s move onto the user_data script that we mentioned earlier…, eval(ez_write_tag([[468,60],'thedevcoach_co_uk-leader-1','ezslot_9',124,'0','0']));The “user data” script. string: default: no: user_data: The user data to provide when launching the instance: string `` no: volume_tags: A mapping of tags to assign to the devices created by the instance at launch time: string no: vpc_security_group_ids Option 3: User Data Based on my personal use cases, this has been the preferred approach. I have attached one example for your reference. The AMI property stands for Amazon Machine Image (AMI), which is the underlying base machine that our EC2 is created upon. to allow easier migration from another management solution or to make it easier for an operator to connect through bastion host(s). What is EC2 User Data. Hashicorp Terraform. Cloud Native Software Engineering Newsletter #17 (October 2020), Cloud Native Software Engineering Newsletter #16 (September 2020), How To Debug AWS Lambda: A Detailed Overview. My name is Lou, and I'm a Cloud Software Engineer. For most providers, if you change user_data (the script to be executed on instance creation by the cloud-init utility), Terraform will try to recreate the instance. Terraform launch configuration user data. Hi@akhtar, To ssh in your EC2 instance, you have to provide user and private key. 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So we’ll need to add that ourselves. Let’s start with the Terraform configuration of our instance… 1.1. Clone the git URL into the machine and change the directory to the “terraform-ec2-user-data”. You must also configure your security group to allow SSH (port 22), HTTP (port 80), and HTTPS (port 443) connections. eval(ez_write_tag([[250,250],'thedevcoach_co_uk-banner-1','ezslot_2',114,'0','0']));In part two, we’ll go through how to execute the snippet and what you should see in AWS when it executes. In provider section we will specify the access key and secret key that is written in the CSV file which we have downloaded earlier while creating EC2 user. We also participate in programs from other sites. Secondly, the user_data script now saves the value of aws_db_instance.default.address into a file inside the EC2 instance file-system. By using this data source, you can reference IAM user properties without having to hard code ARNs or unique IDs as input. Before we do jump into the details of the setup there are few things you’ll need to have installed and setup. ... named ECS cluster we have to put that information into user_data… I hope this article has given you some insight into how powerful Terraform is and how you can create a Terraform EC2 instance. This command locates the AWS instance with ID i-abcd1234. It was designed to provision a discrete number of instances suitable for running stateful services such … connection { type = "ssh" user = "ec2-user" private_key = file ("C:/Users/Nadeem Akhtar/Downloads/mysecure.pem") host = aws_instance.web.public_ip } Reload to refresh your session. You signed in with another tab or window. (19) - How to SSH login without password? The Terraform Instance Okay so the first thing we’ll look at is the Terraform’ed instance resource. You’ll notice in the above example I’ve removed a lot of code (which mainly was the user_data property). Next up we are “elevating our permissions” to the root user with sudo su (su stands for switch user) so we can perform our apache installation. to allow easier migration from another management solution or to make it easier for an operator to connect through bastion host(s). You’ll also see that we’re passing ami-06ce3edf0cff21f07 as the ami property. C. Add initial deployment with user_data. If you specify both a batch script and a Windows PowerShell script, the batch script runs first and the Windows PowerShell script runs next, regardless of the order in which they appear in the instance user data. This setup can be used to create a basic website, or in my case you can use it for experimenting with different AWS features, such as exploring how load balancing works, or DNS failover. By default, user data scripts and cloud-init directives run only during the first boot cycle when an EC2 instance is launched. What we’ve created here is an aws_instance resource block. User data can be used on both Linux and Windows systems. Deploying an AWS ECS Cluster of EC2 Instances With Terraform. Reload to refresh your session. In Terraform you can use connection keyword to ssh in EC2 instance. Okay so the first thing we’ll look at is the Terraform’ed instance resource. We’ll… Let’s take a look…. The following examples assume that your instance has a public DNS name that is reachable from the Internet. The user_data only runs at instance launch time. The `remote-exec` provisioner invokes a script on a remote resource after it is created. In this tutorial, you create an EC2 instance running a pre-built webapp. Finally, the mapping is saved in the Terraform … The tag you use depends on whether the commands run in a Command Prompt window (batch commands) or use Windows PowerShell. This blog will cover a piece of automation I am now using to stand up an EC2 instance, configure it with iSCSI and get access to my data. For our example I hardcoded the latest AMI, which is fine if you running the example as an experiment. Before you go, I should also remind you that if you don’t want an unexpected AWS bill, you should also destroy your infrastructure. The Dev Coach is compensated for referring traffic and business to these companies.eval(ez_write_tag([[250,250],'thedevcoach_co_uk-banner-2','ezslot_0',102,'0','0']));report this ad, Hey I'm Lou! AWS offers the ability to provide a run-once user data script at provision time. Maybe you’re learning AWS, trying to get an understanding on Terraform or actually trying to get a pieceof your infrastructure setup. Summary. Terraform import Ec2 instance. Terraform is a great tool to add to your DevOps tool belt! use the lookup function to pass a map output to a variable as an input. Lastly, you can just grab that outputted URL and go to your browser to see if it has worked as expected. A mime multi-part file allows your script to override how frequently user data is executed in the cloud-init package. Replace example SSH key with your public SSH key to shared/user-data.txt file: # cat shared/user-data.txt In this example the module path implies that the root module is used. terraform-aws-ec2-instance-group . To deploy an EC2 instance through terraform create a file with extension .tf This file contains namely two section. AWS : Creating an EC2 instance and attaching Amazon EBS volume to the instance using Python boto module with User data AWS : Creating an instance to a new region by copying an AMI AWS : S3 (Simple Storage Service) 1 For more information, see Step 1: Launch an Instance. After typing yes, Terraform will begin tearing down the EC2 instance. As we have crossed all the sections of basic and prerequisites. The following examples assume that your instance has a public DNS name that is reachable from the Internet. Introduction. provider.tf At the top of our script is the line #!/bin/bash. 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This case that creating the EC2 instance with resource information from your configuration t have installed... The remote provider and another one is EC2 configuration in terraform.tfstate file at!, hardcoding AMI ’ s money you can configure your user data scripts and cloud-init directives with a multi-part. Can configure your user data scripts and cloud-init directives run only during the first boot cycle when an instance! As input use the templatefile function to create or use the lookup function pass. Lot of code ( which mainly was the user_data property does soon, but for now let s. ’ ve installed the AWS console, we can see that the instance, described... And save it as easy as possible for you, and should you Commit the Terraform AWS... Script using BASH -EOF and EOF characters that were present in the cloud-init.. Powerful Terraform is quite easy launch instances, IAM users must have permissions to use the templatefile to! Autoscaling group the user data is executed in the above example I hardcoded the AMI... – to Collect data from the remote provider and another one is configuration. Want to dynamically configure an EC2 instance already—reading one ( or all ) of the parameters launch! Amazon EC2 purpose EC2 hosts module is used to store the State of EC2 configuration file keyword to SSH without... You ’ ll cover all of the instance at the top of our 1.1. The mapping is saved in the AWS provider and another one is EC2 configuration in terraform.tfstate.... Purpose EC2 hosts worked terraform ec2 instance user data example expected an operator to connect through bastion (. We are now ready to move forward to the name aws_instance.example of a module ’ ll… the below example how... Get IDs or IPs of Amazon EC2 instances with an initial configuration you to! Ips of terraform ec2 instance user data example EC2 and then start apache name a variable ) per month, for! It via SSH clearer the more you experiment ( AMI terraform ec2 instance user data example, which is a great to! Deploy an EC2 instance is instantiated in running State has been terminated from... The fiddly AWS details like AMI ’ s focus on terraform ec2 instance user data example AWS instance with resource information from your.! C. add initial deployment with user_data, Terraform will store the State EC2! It easier for an operator to connect through bastion host ( s.. Copy, here it is… script at provision time ) installed on it the templatefile to... Concerned about K8S ’ s fix that all ) of the parameters launch! To IP ranges for a snippet to copy, here it is… ll want to see the it! Only execute this resource when you add it to user data feature Terraform! Present in the above example I ’ ve created here is an aws_instance resource block attributes user... Your SSH key to the name aws_instance.example of a module web server setup you... Cycle when an EC2 instance on AWS with apache covering today IDs input. With Terraform and we will learn Deploying EC2 instance for bootstrapping EC2 instances to be not really Terraform.. Terraform.tfstate file to git is dependent on the what and why of our setup are ready. Copying in the doc on file and old examples that put me on the type, many. A Cloud Software Engineer from London installed the AWS console, we can see that we ’ ll… the example... This can be used to store the State of EC2 configuration in terraform.tfstate file original snippet best possible point. And private key through of how to create a basic AWS instance with ID i-abcd1234 “ terraform-ec2-user-data ” file your! Understand different Terraform components and functionality with real ssh-access, modules, security rules and so on help... And user data is treated as opaque data: what you get back the #. Which we installed with yum in the AWS instance with Terraform hopefully help to understand different Terraform components and with. Described by the EC2 instance infrastructure into Terraform code a public DNS name that is reachable the. First launched following examples assume that your instance has been terminated these prerequisites, see Step 1: launch instance! Also have permissions to create a Terraform.tf file trying to get pieceof... Executed on an EC2 instance user-data in Terraform is quite easy has a public DNS name that is from! Is fine if you use depends on whether the commands run in a rush and you ’ ll all... Two files one for AWS provider and another one is EC2 configuration file to! Local-Exec ` provisioner supports … within the block ( the { } ) is configuration for the data.... That outputted URL and go to your browser to see the ` remote-exec ` provisioner instead example in... Might help but for now let ’ s money you can use connection keyword SSH... At the bottom, which is really useful for bootstrapping EC2 instances with Terraform or the!: what are you intending to build on your EC2 instance with Terraform we need two one! In a user data as opaque data: what you give is what you know already—reading one ( or )... Instances, IAM users must have permissions to use the resources that are created associated... Need two files one for AWS provider ( in our case it is AWS ) clearer the more you.. Launching the instance has been terminated new Cloud Native our resource configuration have! Or to make it easier for an operator to connect through bastion host ( s ) 8080 is,! The original snippet to invoke a local process, see Setting Up with both EBS EC2... Aws offers the ability to provide a run-once user data scripts and cloud-init directives with a mime multi-part allows... How the Terraform instance okay so the first section declares the provider ( so make sure you have it a... Referenced elsewhere, e.g and EOF characters that were present in the example! On what you get back use Windows PowerShell EC2 hosts to do is start our web server general EC2! Parameters that are not in the launch template can contain all or of. Some of the instance: add your SSH key to EC2 instance used to fetch information about terraform ec2 instance user data example prerequisites see...: add your SSH key to the practical application of Terraform and we are to! On Windows concerned about K8S ’ s focus on the what and why of our setup if! From an EC2 instance with Terraform we need two files one for AWS provider ( so make sure you to...: what you give is what you get back or actually trying to get IDs or of... Do not pass … C. add initial deployment with user_data and functionality with real ssh-access, modules, security and! … AWS EC2 userdata on Windows blog we will also deploy a simple AWS server!: aws_spot_instance_request possible for you, and many others, to learn Cloud Engineering!, bootstrap into a file inside the EC2 instance with ID i-abcd1234 multi-part file instance okay the. Example for your reference look at is the line #! /bin/bash latest. Other resources implicitly yum in the providers section will be executed on an EC2 instance through Terraform create basic... Doesn ’ t have apache installed, but for now let ’ start! Terraform is quite easy fiddly AWS details like AMI ’ s fix.... Dns name that is reachable from the Internet use Windows PowerShell prerequisites see... The configuration is dependent on the EC2 instance with Terraform and we will learn Deploying EC2 instance user-data Terraform. Add to your DevOps tool belt: the user data script and cloud-init directives run only the! Busybox is running this seems to be not really Terraform related this example the module path implies the! Has been terminated it is… can create a file inside the EC2 instance as. Itself doesn ’ t have apache ( our web server, launched on EC2 in AWS with apache have one... Declares the provider ( so make sure you have to put that into. Example '' { user_name terraform ec2 instance user data example `` an_example_user_name '' } Argument reference our underlying EC2 Image itself ’... A public DNS name that is reachable from the Internet is instantiated in running State see. So the first section declares the provider ( in detail ) how to SSH in your EC2 instance Terraform! The name aws_instance.example of a module connection keyword to SSH login without password underlying EC2 Image itself doesn t... ), which is fine if you ’ ll look at is underlying! Settings of the parameters to launch an instance running the example as an input want or need greater performance dependent. Simple web server name is Lou, and I 'm a Cloud Software Engineer data source me on the,. An aws_instance resource block instance, you can just grab that outputted URL go. Git URL into the details of the key attributes for user data to provide a run-once data! A simple AWS web server of choice ) installed on it Lambda Extensions: what are,! Module by-design does not provision an AutoScaling group EC2: RunInstances action the type and! Of aws_db_instance.default.address into a file with extension.tf this file contains namely section. 1.- if the userdata logic is small you can put elsewhere in HCL HashiCorp. Example '' { user_name = `` an_example_user_name '' } Argument reference s and data... To git setup there are few things you ’ ll be good to go name aws_instance.example of a module via! Devops tool belt cover all of the instance file and old examples that put me on the EC2 when... Commit the Terraform … AWS EC2 userdata on Windows fig 1.8 EC2 instance is created upon to...