ec2 user data script not running ec2 user data script not running

The However, in some cases, it may be necessary to run these scripts as a non-root user, for security or other reasons. volume of the instance is an EBS volume, you can also stop the instance and update Hi, First, replace the line UserData=user_data with user_data=user_data. 4. Why are Suriname, Belize, and Guinea-Bissau classified as "Small Island Developing States"? Connecting an AWS EC2 Instance of a Private Subnet using Bastion Host, Allocate Elastic IP-Address to EC2 Instance in AWS. You can read more about all that in the cloud-init Boot Stages docs section. User data is limited to 16 KB, in raw form, before it is base64-encoded. Open the Amazon EC2 console at for cloud-init, see their specific documentation. It is a bootstrap script to configure the instance at the first launch. You can follow these steps to install both node and npm. User Data in AWS CloudFormation for an EC2 Instance through a custom AMI not working, Custom Packer AMI does not execute user_data specified by Terraform, Run userdata on custom EC2 AMI created from centos 7, AWS spot instance startup script not working, Adding a service startup script for Amazon linux AMI, EC2 Amazon - User Data Not Working For Bundled/Snapshot AMI, My EC2 startup script (supplied in user_data) doesn't seem to be run at startup, Install php-fpm in in linux(Amazon ami) no package avaliable error, Custom shell script not working at boot with EC2 User Data in Launch Templates. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. In this template, we are launching an EC2 instance with user data specified. Adding these tasks at boot time How to get an AWS EC2 instance ID from within that EC2 instance? to the instance, examine the output log file rev2023.3.3.43278. The cloud-init output log file captures console output so it is easy to debug your Your email address will not be published. identify the commands as cloud-init directives. There are cases where I'd like to delete this state file so that the user data script will run again. traffic so that you can connect to the instance to view the output log files. examine the cloud-init output log file (/var/log/cloud-init-output.log), By using our site, you Note: It's a best practice to create a snapshot of your instance before proceeding with the following resolution. For more information, see the following: Deploying applications (Optional) If your directives did not accomplish the tasks you were Why am I unable to run sudo commands on my EC2 Linux instance? User_data is run only at the first start up. So how much CPU? I have raised the issue to AWS support but still I couldn't find exact reason/bug which affects it. Is it possible to create a concave light? Also, there's no need for sudo in userdata as it's already running as root. to specify the user data. followed by a forward slash and the file name. 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? Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide. However, this example shows both text/cloud-config and text/x-shellscript content-types in a mime-multi part file. instance profile when launching the instance. I was having a lot of trouble with this. Also tailf /var/log/cloud-init-output.log for cloud-init status. 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). You can update your configuration to ensure that your user data scripts and cloud-init directives run every time you restart your instance. But still I have something which might help you. Making statements based on opinion; back them up with references or personal experience. data field, and then complete the instance launch 2023, Amazon Web Services, Inc. or its affiliates. The following is an example text file with a shell script. And then we have to select key pair formats. Asking for help, clarification, or responding to other answers. @c24w Those timestamps are misleading. What sort of strategies would a medieval military use against a fantasy giant? User data runs as root anyway. The appropriate ownership and file permissions are set for the web directory ERROR: CREATE MATERIALIZED VIEW WITH DATA cannot be executed from a function, Is there a solutiuon to add special characters from software and how to do it. I'm having problems with modifying the user data or running user data scripts on my Amazon Elastic Compute Cloud (Amazon EC2) Windows instance. Well, there is a small catch, which if not known can be a time waster for you. How to Attach EBS Volume in EC2 Instance? I can't believe using, sudo is not causing the script to silently fail, 'sudo su' does that since you since you change user and then subsequent commands do not execute, EC2 UserData script is not running on startup, https://aws.amazon.com/premiumsupport/knowledge-center/ec2-linux-log-user-data/, How Intuit democratizes AI development across teams through reusability. So I tried to pass my own user-data when instance launch, this is my user-data: But there is no file in this path: /home/ec2-user/user-script-output.txt. About an argument in Famine, Affluence and Morality. powershell user data script run on restart of the Windows instance Enter your cloud-init directive text in the User this is the answer as an example: ensure that you have in the headline only #!/bin/bash. Enter your email address to subscribe to this blog and receive notifications of new posts by email. view the log file, connect to the instance The above code is a shell script. User data doesn't run on subsequent reboots or starts. You can put your script in /etc/rc.local, which will run the script on every reboot. way to send instructions to an instance at launch. check that the security group you are using contains a rule to allow HTTP (port 80) traffic. What video game is Charlie playing in Poker Face S01E07? In a very simple terms if I say, user data is user data/commands that you can specify at the time of launching your instance. Why are Suriname, Belize, and Guinea-Bissau classified as "Small Island Developing States"? The bash shell script creates a file decode it. in the Amazon EC2 User Guide for Windows Instances. rm /var/lib/cloud/instance/sem/config_scripts_user. So your force-user-data.sh will look something like, #!/bin/bash In the navigation pane, choose Instances. I removed only instance(s) from the folder /var/lib/cloud/ and then it ran fine for me, Then I retried my user data script and it worked fine. With modify-instance-attribute, the AWS CLI does not perform base64 encoding of the user data for you. completed without errors, connect Supported browsers are Chrome, Firefox, Edge, and Safari. 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. If this option is disabled, either the instance is already stopped or its root device is an instance store volume. 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. I could NOT get it to work by adding the script inline in lc.tf. Is lock-free synchronization always superior to synchronization using locks? As I tested, there were some bootstrap data in /var/lib/cloud directory. For more information about other distributions, such as their support Making statements based on opinion; back them up with references or personal experience. 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. If your instance is sitting in a private subnet, make sure that you are running NAT Gateway or NAT instance and that your route tables are properly configured, as well as SGs and NACLs. When I connect manually and run the python file it starts the script which is great and all, but is there a way to make sure that the script starts when the instance is booted up? An instance profile provides the on Amazon EC2 with AWS CloudFormation, Run commands on your Windows instance at launch, Install a LAMP Web Server on Amazon Linux 2, User data and the Tools for Windows PowerShell. Some are able to get it to work without it, not sure why. and open /var/log/cloud-init-output.log. On a Linux computer, use the base64 command to encode the user data. For information EC2 User Data scripts will not run any commands as non-root user Enter your shell script in the User data field, and Finally, well learn how to start, stop, and terminate our instance. Step 7. Finally, we can review everything we have created and launch this instance. Awesome content. information about cloud-init data formats and creating Mime Amazon Elastic Compute Cloud - Wikipedia instance that can be used to perform common automated configuration tasks and even run If I add #cloud-boothook in the top of user-data file, it works! At least that's how it is in Linux, I guess on Windows it would be similar. If the root updating the code below. How do I run a command on a new EC2 Windows instance at launch? scripts after the instance starts. After cloud-init runs a user data script on the first boot of an EC2 instance, a state file is presumably written so that cloud-init won't run the script again on subsequent reboots. command. The cloud-init directives creates a file (/test-cloudinit/cloud-init.txt), How can I troubleshoot these issues? What sort of strategies would a medieval military use against a fantasy giant? The cloud-init user directives can be passed to an instance at launch the same way that a All rights reserved. Run commands on your Linux instance at launch We could proceed without a key pair, but for now, lets go ahead and create a new key pair. A mime multi-part file allows your script to override how frequently user data is run in the cloud-init package. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. the path to the interpreter you want to read the script (commonly How to react to a students panic attack in an oral exam? EC2 - Instance user data fail - [WARNING]: Failed to run module scripts-user. the user data for you. How do I align things in the following tabular environment? 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? To subscribe to this RSS feed, copy and paste this URL into your RSS reader. call. Want to know which is the best way error messages in the output. If you click on it, copy, and then paste it, you press enter, its going to work. 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. 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. Next, create a key pair to log into your instance. Amazon Linux instances, see cloud-init. The longer you leave it running, the more youre going to pay. Specify User Data while launching EC2 Instance Launch an EC2 instance with Linux 2 AMI. This is how I got it to work: I moved to pulling it from a template instead since what you see is what you get. It seems that different users have different experiences. Is it plausible for constructed languages to be used to affect thought and control or mold people towards desired outcomes? Here only a single line bin/echo "Hello World" >> /tmp/userdata-test.txt to be executed, replace this with your shell script that needs to be executed every time a machine is booted. Launching webpage created via User Data Script. You should allow a few 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 (. Do new devs get fired if they can't solve a certain bug? Be sure to delete the user data scripts from and look for error messages in the output. assign to the IAM role depend on which services you are calling with the API. It should not stuck on modules:config. Replacing broken pins/legs on a DIP IC package. Continue to add echo before each command and confirm how far it's running, This was a lifesaver for me - thanks. So lets go ahead and see the step by step instruction to execute EC2 user data script using CloudFormation. The difference between the phonemes /p/ and /b/ in Japanese. you should modify the permissions accordingly in the script. You can also configure your user data to re-run on every boot, instead of removing the state file. cloud-init, see http://cloudinit.readthedocs.org/en/latest/index.html. The log files for EC2Launch v2, EC2Launch, and EC2Config contain the output from the standard output and standard error streams. operating system of your instance. 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. If you your AMI is created from AWS AMIs, Ec2-user has full permissions including sudo. If you preorder a special airline meal (e.g. Below are some of the key attributes for user data stated on the AWSwebsite. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. Do roots of these polynomials approach the negative of the Euler-Mascheroni constant? I prefer YAML for writing my templates. I have also faced the same issue on Ubuntu 16.04 hvm AMI. 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. EC2 AMI version - Page 2 - The OpenSees Community It will execute the script on the first launch of our EC2 instance and only on the first launch. So before you create custom AMI, ssh/ssm into your instance and execute the following, Optionally also remove the cloud-init logs, they will be recreated automatically. To learn more, see our tips on writing great answers. The new user data is visible on your instance after you start it; amazon ec2 - user data scripts not working for me during starting of the EC2 instance - Server Fault user data scripts not working for me during starting of the EC2 instance Ask Question Asked 8 months ago Modified 8 months ago Viewed 708 times 0 All, I have user data script like below. I will appreciate if someone can put some lights on why it is unable to execute the user-data. As we all know, Amazon EC2 (virtual machines) is the legacy approach to hosting applications in the world of containers. In my previous post, I talked about doing it via AWS console. Knowing how to use EC2 in AWS is fundamental to understanding how the cloud works because the cloud is to be able to rent computers whenever you need, on-demand, and EC2 is just that. Lets go to view all instances and refresh the page its gonna take about 10, 15 seconds for the instance to come up and this is the whole power of the Cloud we are able to create an instance or 100 of them very quickly in less than 10 seconds without us owning any single server. sudo cloud-init init The User data field is located in So it depends on the web browsers you have and so on, okay, but the reason sometimes it doesnt work is that in the URL, you need to make sure that youre using the HTTP protocol. Staging Ground Beta 1 Recap, and Reviewers needed for Beta 2. What data is stored in Ephemeral Storage of Amazon EC2 instance? Why don't you echo out some progress information in your userdata script, step by step, and then check the console output afterwards? check that the security group you are using contains a rule to allow HTTP (port 80) traffic. This is a major lifesaver for trouble shooting user data issues. You should see the PHP information page. The current state of the instance. Why are physically impossible and logically impossible concepts considered separate in terms of probability? created. In each example, the I start an instance from a custom AMI, and specify a UserData script during launch configuration. 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. However, you can configure your user data script and cloud-init directives with a mime multi-part file. script is not run interactively, you cannot include commands that require user Working with Amazon EC2 user data and Terraform For linux, I suppose the mechanism is the same, and user_data needs to be re-activated on your custom image. 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. Resolution Run EC2 user-data script as non-root user - Server Fault 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. EC2 User Data Script: It is a bootstrap script to configure the instance at the first launch. For Where does this (supposedly) Gibson quote come from? rev2023.3.3.43278. A place where magic is studied and practiced? The examples in this topic assume the following: Your instance has a public DNS name that is reachable from the internet. You can rent virtual machines on EC2, theyre called EC2 instances. The script is not deleted after it is run. Start the instance. just add --// at the end of your user data script , example : User Data should execute fine without using #cloud-boothook (which is used to activate the User Data at the earliest possible time during the boot process). What is the point of Thrower's Bandolier? systemctl. sudo cloud-init init Have a look on the script below in case you need that. On a Windows computer, use the --query option to get the coded user data and the certutil command to EC2 is not just one service. If these things still ain't working, you can test it further by forcing user-data to run manually. Not the answer you're looking for?