ec2 user data script not running

How to Execute EC2 User Data Script using Terraform examine the cloud-init output log file (/var/log/cloud-init-output.log), If you are creating this EC2 instance just for learning purpose. We also get some information about hostname, private DNS, Instance type, AMI details, and Key pair. You can follow these steps to install both node and npm. Running Docker on AWS EC2 - Medium On a Linux computer , use the --query option to get the encoded user data and the You can use the AWS CLI to specify, modify, and view the user data for your instance. the path to the interpreter you want to read the script (commonly User data is when we pass a script with some commands to our EC2 instance. User data formats# User data that will be acted upon by cloud-init must be in one of the following types. How to run user data in windows instance using boto3 Step 6. UPDATE: I removed the sudo su and added an echo command for debugging. Modify the user data as needed, and then choose Save. If you want some other version of node to be installed, then change the number for whatever supported version. Run commands on your Linux instance at launch For this example, in a web browser, enter the URL of the PHP test file the directives Paste the content of the user data script in a file named ec2-user-data.sh. These instructions are intended for Steps to Execute EC2 User Data Script using CloudFormation I hope we are clear on the script by now. If we are using user interactive commands like. (/var/log/cloud-init-output.log), and look for decode it. "UNPROTECTED PRIVATE KEY FILE!" The following is example output with the user data base64 encoded. Amazon Elastic Compute Cloud - Wikipedia As your image is a custom one, I suppose it have already been started once and so user_data is desactivated. 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/. But dont worry, If you want it in JSON, I will provideJSONtemplate as well. If you need the instance to have a static public IPv4 address, consider using an. If I add #cloud-boothook in the top of user-data file, it works! And therefore, on the first launch, we shall be able to pass the commands here. For more Connect and share knowledge within a single location that is structured and easy to search. amazon-ec2 cloud-init Share Improve this question Leave the settings to default Our instances are going to get a public IP and then there is going to be a security group attached to our instance (which is going to control the traffic from and to our instance ) and therefore we can add rules. 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. I checked the system logs and saw my echoed string. Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide. Amazon EC2 is one of the most popular AWS offerings. 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. the Advanced details section of the launch instance 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. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. So lets go ahead and see the step by step instruction to execute EC2 user data script using CloudFormation. Also make sure that source/destination check is disabled on NAT instance if you are using it. I'm glad this was encouraged on serverfault. Asking for help, clarification, or responding to other answers. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. There is a public IPv4 address, this is what were going to use to access our EC2 instance. Here is the startup script that I have used for the user-data of the EC2 instance that we will deploy on AWS. Notify me of follow-up comments by email. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. Does a barbarian benefit from the fast movement ability while wearing medium armor? Amazon Web Services - Resolving 403 Forbidden Error When Connecting to API from VPC through API Gateway, AWS DynamoDB - Query the Global Secondary Index, AWS Educate and AWS Emerging Talent Community, Amazon VPC - Introduction to Amazon Virtual Cloud, Amazon EC2 - Creating an Elastic Cloud Compute Instance, AWS DynamoDB - Working with Items & Attributes, Introduction to AWS Elastic Block Store(EBS), Create Bucket Policy in AWS S3 Bucket with Python, Amazon RDS - Introduction to Amazon Relational Database System. The security group associated with your instance is configured to allow SSH (port 22) For more Specify User Data while launching EC2 Instance Launch an EC2 instance with Linux 2 AMI. You can specify below user data to achieve that. Adding a comment below on what you liked and what can be improved. How to Pass the Query String Parameters to AWS Lambda Function or HTTP Endpoint? I'm looking at the moment how to do that in an automated way at the end of the custom image creation. Subscribe to our newsletter below to get awesome AWS learning materials delivered straight to your inbox. Be sure to use the file:// prefix to specify the file. I hope you found this post helpful. amazon ec2 - how to get status of a script running in EC2 and use that The below script worked perfectly for me after the ubuntu ec2 instance was launched. Replacing broken pins/legs on a DIP IC package. rev2023.3.3.43278. The code below is from the cloud init log file. By default, cloud-init allows only one content type in user data at a time. procedure. It actually took me a few hours of research and testing, so once I figured it out, I created this question to help the next person looking for a definitive answer. Staging Ground Beta 1 Recap, and Reviewers needed for Beta 2, Create an AMI with EC2 Launch V2 and make userdata run again after reboot. User data can be used on both Linux and Windows systems. This will act as key-value pair and if you wanted to add additional tags to tag your instance differently, then you could click on Add additional tags. Also, About user data and how it lets you bootstrap instance, A catch regarding specifying user data correctly. Steps to create EC2 User data Specify user data while launching EC2 Instance Allow traffic on port 80 and 443 on Security Group Verify User data Execution/Apache Installation Let's do all these steps one by one. On Windows, you can use the AWS Tools for Windows PowerShell instead of using the AWS CLI. Why are Suriname, Belize, and Guinea-Bissau classified as "Small Island Developing States"? For example, the following user data includes cloud-init directives and a bash shell script. Additionally, you will also needscloudformation:*as well to be able to do CloudFormation stack creation, updation etc. Also I checked the log in /var/log/cloud-init.log, there is no error message. You can also pass this data into the launch instance before you create an AMI from the instance. In the following examples, the commands from the Install a LAMP Web Server on Amazon Linux 2 are converted to a shell script and a set If you stop an instance and then start it later on and if we go to the browser and try again we cant able to see our webpage. You dont need to SSH into your EC2 instance and run those command one by one. User data is limited to 16 KB, in raw form, before it is Base64-encoded. What is the correct way to screw wall and ceiling drywalls? I have specified * for simplicity. script is not run interactively, you cannot include commands that require user 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. but noticed I was getting it with the quotes still in it. What is EC2 User Data Simply put User Data is a set of commands which will be executed on an EC2 instance when it is first launched. If you finally want to get rid of this instance we can do an instance state and then terminate the instance. User-Data used in this post. Find centralized, trusted content and collaborate around the technologies you use most. How to Set Up Apache Web Server in AWS EC2 Linux (Ubuntu) Instance? user data is not running at launch aws ec2 Ask Question Asked 4 years ago Modified 4 years ago Viewed 4k times Part of AWS Collective 1 I am trying to launch an ec2 linux instance (linux 2 ami) and while doing that in the user data, I am trying to get node js installed, and at the same time install git. In this article, we will discuss how to run EC2 User Data scripts as a non-root user. For more information, see Add rules to a security group. Select the instance and choose Instance state, EC2 User Data scripts run with a root user. Unleash the Power of AWS EC2: The Future of Scalable and Flexible EC2 AMI version. Click here to return to Amazon Web Services homepage, back up any data on the instance store volumes, Determine the root device type of your AMI, Stopping and starting the instance erases any data on, If your EC2 instance has an auto-assigned public IPv4 address, then stopping and starting the instance causes the IPv4 address to change. You can also configure your user data to re-run on every boot, instead of removing the state file. If you wanted to compare the instance types click on Compare Instance types it shows you all the types of instances as well as how much memory they have and so on. Not sure which, but I was having no luck getting anything to work. Step 8. EC2 UserData script is not running on startup - Stack Overflow The log files for EC2Launch v2, EC2Launch, and EC2Config contain the output from the standard output and standard error streams. Click here to return to Amazon Web Services homepage. Do I need a thermal expansion tank if I already have a pressure tank? The following are common issues that occur when utilizing Windows EC2 instance user data: Keep the following in mind when working with user data: For more information, see How do I run a command on an existing EC2 Windows instance when I reboot or start the instance? Feel free to add a comment in case you need me to cover using CLI as well. There are cases where I'd like to delete this state file so that the user data script will run again. 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. It only takes a minute to sign up. For information By default, you can include only one content type in user data at a time. I do have script handy for that. Example userdata file would be like: This will make userdata script to execute on last step of every boot process. Want to know which is the best way Did any DOS compatibility layers exist for any UNIX-like systems before DOS started to become outmoded? user data is not running at launch aws ec2 - Stack Overflow [WARNING]: Unhandled non-multipart (text/x-not-multipart) userdata: 'Content-Type: text/cloud'. For more information on mime multi-part files, see Mime Multi Part Archive on the cloud-init website. On services, tab search for EC2 and click on instances in the sidebar for creating an EC2 Instance. With run-instances, the AWS CLI performs base64 encoding of What is a word for the arcane equivalent of a monastery? It should not stuck on modules:config. sudo rm -rf /var/lib/cloud/* You should see the PHP information page. I notice that in your supplied code, one example refers to /home/ec2-user/user-script/output.txt (with a subdirectory) and one example refers to /home/ec2-user/user-script-output.txt (no subdirectory). According to AWS User-data explanation: 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. If you stop an instance and then modify its user data, the updated user data isn't run when you start the instance. Replace it with an 'echo start'. Run commands on your Linux instance at launch, Run commands on your Windows instance at launch. We're sorry we let you down. Dear reader, In this post, I will help you execute EC2 user data scripts using CloudFormation. On a Windows computer, use the certutil command to encode the user data. The cloud-init output log file captures console output so it is easy to debug your Open a PowerShell command window and run the following command: C:\ProgramData\Amazon\EC2-Windows\Launch\Scripts\InitializeInstance.ps1 -Schedule Disconnect from your Windows instance. sudo cloud-init modules -m final These things include: apt upgrade should be run on first . Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. sudo command in the script. So how much CPU? You can pass two types of user data to Amazon EC2: shell It supports only the user_data key. The cloud-init user directives can be passed to an instance at launch the same way that a If you have Mac or Linux or Windows 10 then you can use the .pem format. flag). Choose Actions, Instance Settings, Edit User Data. about viewing user data from your instance using instance metadata, see Retrieve instance user https://console.aws.amazon.com/ec2/. If any one of those conditions is not met, your user data scrip will fail, since it need connection to the Internet (in your case). exit 0. I start up a few long running processes with this script, and would like them to be non-privileged processes. I have a step function that kicks off a python script in EC2. scripts and cloud-init directives. command as follows: To retrieve the user data for an instance, use the describe-instance-attribute command. Stack Exchange network consists of 181 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers. For more Start your EC2 instance again, and validate that your script runs correctly. 2. Open the Amazon EC2 console at https://console.aws.amazon.com/ec2/. check that the security group you are using contains a rule to allow HTTP (port 80) traffic. You want to create a filelog.txtin dev folder as soon as your instance starts. rev2023.3.3.43278. How can I utilize user data to automatically run a script with every restart of my Amazon EC2 Linux instance? In configuration, keep everything as default and click on Next. As you might already know, EC2 user data script, lets you bootstrap your EC2 instance by executing some commands(that you specify) dynamically after your instance is booted. 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. Does a summoned creature play immediately after being summoned by a ready action? User-data scripts is not running on my custom AMI, but working in Stop your instance. information about cloud-init data formats and creating Mime Unfortunately I cannot share the script due to confidentiality so if any has any tips on what could possible be wrong I'd love to hear from you. Error using SSH into Amazon EC2 Instance (AWS). I have added below line in /etc/rc.local to make it happen. /var/log/cloud-init-output.log. Learn more about Stack Overflow the company, and our products. The appropriate ownership and file permissions are set for the web directory section and Create a security group. Then I found this article about user data formatting user That makes sense, if user-data can come in multiple parts, maybe cloud-init needs cloud-init commands in one place and the script in the other. Ref: https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/user-data.html#user-data-shell-scripts. of cloud-init directives that run when the instance launches. Also, the limit on user data size is 16 KB. appropriate AWS credentials required by the user data script to issue the API You should see the PHP information page. Open the Amazon EC2 console, and then select your instance. Enter your shell script in the User data field, and directory on any instance launched from the AMI. Work with instance user data - Amazon Elastic Compute Cloud Browse other questions tagged, Start here for a quick overview of the site, Detailed answers to any questions you might have, Discuss the workings and policies of this site. (Optional) If your directives did not accomplish the tasks you were operating system of your instance. EC2 - Instance user data fail - [WARNING]: Failed to run module scripts To troubleshoot issues on your EC2 instance bootstrap without having to access the instance through SSH, you can add code to your user-data bash script that redirects all the output both to the /var/log/user-data.log and to /dev/console.When the code is run, you can see your user-data invocation logs in your console. How can I explain to my manager that a project he wishes to undertake cannot be performed by the team? Run user data after the initial launch of your EC2 instance view the log file, connect to the instance feedback (such as yum update without the -y For If you use HTTPS, this is not going to work and its going to give you an infinite loading screen. Next, we need to configure the storage for this instance lets have an eight-gigabyte gp2 root volume because, in the free tier, we can get up to 30 gigabytes of EBS General Purpose SSD storage. With the instance still selected, choose Actions, Also tailf /var/log/cloud-init-output.log for cloud-init status. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. The new user data is visible on your instance after you start it; 2023, Amazon Web Services, Inc. or its affiliates. for cloud-init, see their specific documentation. Connecting an AWS EC2 Instance of a Private Subnet using Bastion Host, Allocate Elastic IP-Address to EC2 Instance in AWS. user data is not running at launch aws ec2, docs.aws.amazon.com/AWSEC2/latest/UserGuide/, How Intuit democratizes AI development across teams through reusability. vegan) just to try it, does this inconvenience the caterers and staff? Is lock-free synchronization always superior to synchronization using locks? User data scripts require a specific syntax. The following is an example text file with a shell script. The on Amazon EC2 with AWS CloudFormation in the AWS CloudFormation User Guide. Go to the AWS Management Console (https://aws.amazon.com/console/). Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide, Assuming, you are using Amazon Linux 2, did you check information in /var/log/cloud-init-output.log (. You should allow a few minutes of extra time for the tasks to complete Then I am trying to get clone my github repo and then start the node js server, all this done in the userdata. So I tried to pass my own user-data when instance launch, this is my user-data: My code is GPL licensed, can I issue a license to have my code be distributed in a specific MIT licensed project? I am trying to automate EC2 instance creation. Grab the YAML or JSON template from above as per your convenience. Which means user-data / cloud-init script won't do what you want anyway. and Manage Windows instance configuration in the A limit involving the quotient of two sums, "We, who've been connected by blood to Prussia's throne and people since Dppel". Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. For more information and examples of script syntax, see. 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. But please revise your permission based on uses to follow principal of least priviledge. If these things still ain't working, you can test it further by forcing user-data to run manually. Topological invariance of rational Pontrjagin classes for non-compact spaces, Finite abelian groups with fewer automorphisms than a subgroup. the BASH For the sake of completeness, if you have a situation where you care to keep track of the fact/possibility that this AMI [had a parent AMI that ] and they all ran cloud-init user data, you can delete only the current semaphore. EC2 is not just one service. The permissions you Run EC2 user-data script as non-root user Ask Question Asked 10 years, 9 months ago Modified 3 years, 9 months ago Viewed 12k times 8 I'm able to run a user-data script successfully, but it runs as root. For more information, see If this option is disabled, either the instance is already stopped or its root device is an instance store volume. Operating Systems that can we choose for our EC2 instances are Linux, Windows, or Mac OS. I am trying to check everywhere, in the cloudlog init file to find some error why my user data is not working. Is it suspicious or odd to stand by the gate of a GA airport watching the planes? And in the Cloud, you can start and stop instances just as you wish. How To Use Systems Manager and Secret manager To Automate EC2 cloud-init, see http://cloudinit.readthedocs.org/en/latest/index.html. Guide to running EC2 User Data scripts as a non-root user?