ec2 user data script not running

For this, well be launching our EC2 instance which is, well, a virtual server and well use the console for this then we will launch a web server directly on the EC2 instance using a piece of code as user data script and we will pass to the EC2 instance. Open the Amazon EC2 console at https://console.aws.amazon.com/ec2/. If you need more information, I'm glad to provide, please let me know what happened in my own AMI and how to fix it? Replace it with an 'echo start'. EC2 - Instance user data fail - [WARNING]: Failed to run module scripts sudo bash /home/ubuntu/force-user-data.sh || exit 1, But here is the catch, it will execute the script on each boot so which will make your user-data to run on every single boot, just like #cloud-boothook. These things include: apt upgrade should be run on first . Why are non-Western countries siding with China in the UN? Firewall rules of our EC2 instance, and that is the security group. operating system of your instance. This worked for me on an Ubuntu, however I needed to run. The user data are stored in files name part_001 etc. information about the configuration tasks that the cloud-init package performs for Choose Actions, choose Instance Settings, and then choose Edit User Data. Below are some of the key attributes for user data stated on the AWSwebsite. User data runs as root anyway. However, the last command does not seem to be getting executed. You have to use cloud_final_modules in your userdata script to re-run the userdata script and for that you have to customise uderdata to have miultiple files in userdata. This URL is the public DNS address of your instance followed by a To learn more, see our tips on writing great answers. to that file. I could NOT get it to work by adding the script inline in lc.tf. following tasks are performed by the user data: The distribution software packages are updated. But still I have something which might help you. check that the security group you are using contains a rule to allow HTTP (port 80) traffic. I was having a lot of trouble with this. How is Jesus " " (Luke 1:32 NAS28) different from a prophet (, Luke 1:76 NAS28)? Your email address will not be published. For more information about UPDATE: I removed the sudo su and added an echo command for debugging. This URL is the public DNS address of your instance Are there tables of wastage rates for different fruit and veg? You can't configure user data. What's the best way to do this ? And therefore, on the first launch, we shall be able to pass the commands here. If you are creating this EC2 instance just for learning purpose. Note: It's a best practice to create a snapshot of your instance before proceeding with the following resolution. This script is going to update packages, then install the HTPD web server on the machine, and then write a file using httpd, an HTML file that will be a web server. I'll provide detailed walk-though. Making statements based on opinion; back them up with references or personal experience. If you your AMI is created from AWS AMIs, Ec2-user has full permissions including sudo. So how much CPU? So, therefore, you need to copy the new IPv4 and make sure to use HTTP to have access back to our EC2 instance. Also tailf /var/log/cloud-init-output.log for cloud-init status. We can see our EC2 instance is running but if we dont need it, we can go to the instance state and then click on stop instance. Thanks for contributing an answer to Stack Overflow! How much compute power and cores do you want on this virtual machine i.e. Run user data after the initial launch of your EC2 instance How do I run a command on a new EC2 Windows instance at launch? The nature of simulating nature: A Q&A with IBM Quantum researcher Dr. Jamie We've added a "Necessary cookies only" option to the cookie consent popup, Run a bash script after EC2 instance boots. When you create a key pair it will be downloaded automatically to your pc. In this article, we are going to launch our EC2 instance running Amazon Linux. Do I need a thermal expansion tank if I already have a pressure tank? You can't find the user data logs. Step 1: The attacker gained initial access by exploiting a public-facing service in a self-managed Kubernetes cluster hosted inside an AWS cloud account. Additionally, you will also needscloudformation:*as well to be able to do CloudFormation stack creation, updation etc. Either it's because User Data is only for running commands on newly created instances (such as bootstrapping instances for scaling), or because the documentation is out of date. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. I am trying to launch an ec2 linux instance (linux 2 ami) and while doing that in the user data, I am trying to User data is a feature that allows customization of Amazon EC2 (virtual machine) when it is created and (if desired) also with each restart after they are provisioned. You can access the log files at the following locations: EC2Launch v2: C:\ProgramData\Amazon\EC2Launch\log\agent.log, EC2Launch: C:\ProgramData\Amazon\EC2-Windows\Launch\Log\UserdataExecution.log, EC2Config: C:\Program Files\Amazon\Ec2ConfigService\Logs\Ec2ConfigLog.txt. Do roots of these polynomials approach the negative of the Euler-Mascheroni constant? Staging Ground Beta 1 Recap, and Reviewers needed for Beta 2, AWS - UserData is not executed for instance created from custom image. multi part archive, see cloud-init Formats. By default, user data scripts and cloud-init directives run only during the boot cycle when you first launch an instance. Check your system log and you should see that Echo in the Management console, Also add this https://aws.amazon.com/premiumsupport/knowledge-center/ec2-linux-log-user-data/. This will install node version 4.4.5. Your instance is launched with an Amazon Linux 2 AMI. information, see Create a security group. updating the code below. Not sure why you have it there. flag). Is there a proper earth ground point in this switch box? In this example, there is only one line to be run, which is /bin/echo "Hello World." By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. Is it suspicious or odd to stand by the gate of a GA airport watching the planes? So the EC2 User Data has a very specific purpose. You can also configure your user data to re-run on every boot, instead of removing the state file. Why am I unable to run sudo commands on my EC2 Linux instance? information about cloud-init data formats and creating Mime instance that can be used to perform common automated configuration tasks and even run Everything else in the script runs correctly because when I manually connect to the instance all of the scripts and software are where they should be. It is a bootstrap script to configure the instance at the first launch. Once the instance name is created we can observe a few things. Find centralized, trusted content and collaborate around the technologies you use most. Do I need a thermal expansion tank if I already have a pressure tank? What can a lawyer do if the client wants him to be acquitted of everything despite serious evidence? so User data will be executed If your AMI is a snapshot of the machine ( lift and Shifted from. get node js installed, and at the same time install git. I have noticed that UserData scripts are not being executed. /var/log/cloud-init-output.log. Some are able to get it to work without it, not sure why. launched; most notably, it configures the .ssh/authorized_keys The new user data is visible on your instance after you start it; acknowledge that you have read and understood our, Data Structure & Algorithm Classes (Live), Data Structure & Algorithm-Self Paced(C++/JAVA), Android App Development with Kotlin(Live), Full Stack Development with React & Node JS(Live), GATE CS Original Papers and Official Keys, ISRO CS Original Papers and Official Keys, ISRO CS Syllabus for Scientist/Engineer Exam, Build a Grocery Store Web App using PHP with MySQL. communities including Stack Overflow, the largest, most trusted online community for developers learn, share their knowledge, and build their careers. To Follow the procedure for launching an instance. Learn more about Stack Overflow the company, and our products. If the instance is Enter the stack name and click on Next. On a Windows computer, use the certutil command to encode the user data. What's the difference between a power rail and a signal line? SCARLETEEL: Operation leveraging Terraform, Kubernetes, and AWS for sudo rm -rf /var/lib/cloud/* I have tested it on Ubuntu. The following is an example text file with a shell script. And in programming, when you do something for the first time, you usually say hello world. For linux, I suppose the mechanism is the same, and user_data needs to be re-activated on your custom image. I have also faced the same issue on Ubuntu 16.04 hvm AMI. Next, we need to choose an instance type. For more information on mime multi-part files, see Mime Multi Part Archive on the cloud-init website. Edit: I should also add that in the user data the machine cd's into the directory where the python file is and runs the command to execute it. EC2 User Data to Install Apache Web Server, This is how it looks like in a CloudFormation Template, I hope we are clear on the script by now. If you are using a custom AMI and had UserData passed in the instance you generated the AMI from, then, the cloud-init per-instance(i.e., on first boot, in this case the UserData you pass when you create an instance from your custom AMI) section will not be executed as it does not recognize this as first boot. create will be owned by the root user; if you need a non-root user to have file access, How to Set Up Apache Web Server in AWS EC2 Linux (Ubuntu) Instance? For additional debugging information, you can create a Mime multipart You can store data on virtual drives or EBS volumes. For our example, in a web browser, enter the URL of the PHP test Copy your user script into the Edit user data box, and then choose Save. At a minimum, you should connect to the instance immediately after launch and change the password interactively. It's not needed. How can I troubleshoot these issues? Have you checked your SGs and NACL configurations? 2023, Amazon Web Services, Inc. or its affiliates. When you launch an instance in Amazon EC2, you have the option of passing user data to the instance that can be used to perform common automated configuration tasks and even run scripts after the instance starts.