ec2 user data script not running

Thank you. then check to see that your script has completed the tasks that you intended. The following is an example text file with a shell script. Run EC2 user-data script as non-root user - Server Fault Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. Navigate to EC2 instance, grab the instance public IP from instance details screen and hit the pubic IP. To learn more, see our tips on writing great answers. EC2 is not just one service. Bootstrapping means launching commands when the machine starts. First, enter a name tag for the instance. I have noticed that UserData scripts are not being executed. error messages in the output. As we all know, Amazon EC2 (virtual machines) is the legacy approach to hosting applications in the world of containers. Staging Ground Beta 1 Recap, and Reviewers needed for Beta 2. Step 8. As your image is a custom one, I suppose it have already been started once and so user_data is desactivated. The simplicity helped me alot. Otherwise it may run in AMAZON Linux AMI , but itll not run in RHEL. Amazon Elastic Compute Cloud - Wikipedia Feel free to add a comment in case you need me to cover using CLI as well. 1. echo Run yum update -y. By default, user data scripts and cloud-init directives run only during the first boot cycle when an EC2 instance is launched. Then you > should type "pip install StarCluster". User-Data used in this post. amazon-ec2-user-guide/user-data.md at master - GitHub a few minutes for the instance to stop. But if you decide to stop an instance, then AWS will not bill you for it. It stands for Elastic Compute Cloud. Is there a solutiuon to add special characters from software and how to do it. To You should allow a few minutes of extra time for the tasks to complete Cam I instruct an AWS EC2 instance to run in "maintenance" mode with cloud-init (user data), Starting a long-running process in cloud-init on ec2 instance, how to disable executing user-data by cloud-init, Cloud-init is failing to execute awscli command in User Data, AWS Userdata script in Cloud Init not running, EC2 instance settings user data option not present, Redoing the align environment with a specific formatting. Asking for help, clarification, or responding to other answers. You should see hello world response fro your server. UPDATE: I removed the sudo su and added an echo command for debugging. /bin/bash). Hi, First, replace the line UserData=user_data with user_data=user_data. How are we doing? If this option is disabled, either the instance is already stopped or its root device is an instance store volume. Cloud config data# Cloud-config is the simplest way to accomplish some things via user data. However, you can use the I'm looking at the moment how to do that in an automated way at the end of the custom image creation. Does Counterspell prevent from any further spells being cast on a given turn. Before taking AMI remove /var/lib/cloud directory (each time). Finally, well learn how to start, stop, and terminate our instance. 3. Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide. AWS OpsWorks. If these things still ain't working, you can test it further by forcing user-data to run manually. 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. User data must be Base64-decoded when retrieved. Why are Suriname, Belize, and Guinea-Bissau classified as "Small Island Developing States"? In the navigation pane, choose Instances. It only takes a minute to sign up. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. Run a bash script after EC2 instance boots - Server Fault To learn more, see our tips on writing great answers. What sort of strategies would a medieval military use against a fantasy giant? EC2 User Data scripts will not run any commands as non-root user I am creating an EC2 Launch Template with the following (exact) User Data: #!/bin/bash echo "hello" >> /home/ubuntu/1.txt sudo -u ubuntu curl "https://awscli.amazonaws.com/awscli-exe-linux-x86_64.zip" -o "awscliv2.zip" >> awscli-download.txt echo "hello" >> /home/ubuntu/2.txt Amazon EC2 is one of the most popular AWS offerings. created. get node js installed, and at the same time install git. Where is it? If you've got a moment, please tell us what we did right so we can do more of it. When a user data script is processed, it is copied to and run from However, the last command does not seem to be getting executed. http://cloudinit.readthedocs.org/en/latest/index.html, Combine shell scripts and cloud-init directives, Deploying applications (Optional) If your directives did not accomplish the tasks you were command line tools), or as base64-encoded text (for API calls). I would be more than happy to reply to your comment. 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. How to make EC2 user data script run again on startup? How to Provide the Static IP to a Docker Container? vegan) just to try it, does this inconvenience the caterers and staff? 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. At a minimum, you should connect to the instance immediately after launch and change the password interactively. sudo rm -rf /var/lib/cloud/* @jarmod how can I echo it out? before you create an AMI from the instance. Have a look on the script below in case you need that. about viewing user data from your instance using instance metadata, see Retrieve instance user On ubuntu 16, removing /var/lib/cloud/* does not work. 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. If you use an AWS API, including the AWS CLI, in a user data script, you must use an 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. The cloud-init output log file captures console output so it is easy to debug your User data shell scripts must start with the #! sudo rm -f /home/ubuntu/force-user-data.sh In this article, we are going to pass below code. And then we have to select key pair formats. In the navigation pane, choose Instances. 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. Why are physically impossible and logically impossible concepts considered separate in terms of probability? You want to create a filelog.txtin dev folder as soon as your instance starts. It should work since when I ssh into the instance and do the following script from inside the instance it does the work, so I am assuming the configuration won't be the problem. The cloud-init directives creates a file (/test-cloudinit/cloud-init.txt), When prompted for confirmation, choose Stop. How is Jesus " " (Luke 1:32 NAS28) different from a prophet (, Luke 1:76 NAS28)? All rights reserved. I love New Pluralsight course on AWS Systems 5 years ago AWS Simple Systems Manager for EC2: Getting Started I am happy to PowerShell DSC to manage PowerShell rev2023.3.3.43278. A limit involving the quotient of two sums, "We, who've been connected by blood to Prussia's throne and people since Dppel". Therefore, always remeber to base64-encode your user data script while specifying your user data. 2. Even though the server is running we cant able to see the message. 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. If you find any issue, please fee free to reach me in comment section. If the instance is In this article, we will discuss how to run EC2 User Data scripts as a non-root user. By default, you can include only one content type in user data at a time. User-data scripts is not running on my custom AMI, but working in In the example script below, the script creates and configures our web server. My code is GPL licensed, can I issue a license to have my code be distributed in a specific MIT licensed project? 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. Allow enough time for the instance to launch and run the directives in Work with instance user data - Amazon Elastic Compute Cloud For more information about other distributions, such as their support identify the commands as cloud-init directives. So, that EC2 User data script is only run once and when it first starts, and then will never be run again. to specify the user data. Often times that actions that an. 3. Be sure to use the Do roots of these polynomials approach the negative of the Euler-Mascheroni constant? Does a summoned creature play immediately after being summoned by a ready action? 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. so User data will be executed If your AMI is a snapshot of the machine ( lift and Shifted from. 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). I believe there is a way to run a PowerShell script from user data, however user-data script is only run on the first instance boot, not on every restart. sudo rm -rf /var/lib/cloud/* @c24w Those timestamps are misleading. EC2 User Data scripts will not run any commands as non-root user Why am I unable to run sudo commands on my EC2 Linux instance? Which means user-data / cloud-init script won't do what you want anyway. 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 (. multi part archive, see cloud-init Formats. 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. I'll provide detailed walk-though. Also, there's no need for sudo in userdata as it's already running as root. For additional debugging information, you can create a Mime multipart It actually corresponds to the private IPv4 address. User_data is run only at the first start up. The #cloud-boothook solution is not working for me. Copyright 2020 CloudKatha - All Rights Reserved, Click to share on Twitter (Opens in new window), Click to share on Facebook (Opens in new window), Click to share on LinkedIn (Opens in new window), Click to share on Telegram (Opens in new window), Click to share on WhatsApp (Opens in new window), How to Execute EC2 User Data Script using CloudFormation. Open the Amazon EC2 console, and then select your instance. We could proceed without a key pair, but for now, lets go ahead and create a new key pair. To specify user data when you launch your instance, use the run-instances A limit involving the quotient of two sums, Short story taking place on a toroidal planet or moon involving flying, Theoretically Correct vs Practical Notation, Minimising the environmental effects of my dyson brain, About an argument in Famine, Affluence and Morality, Follow Up: struct sockaddr storage initialization by network format-string. You dont need to SSH into your EC2 instance and run those command one by one. information, see Create a security group. 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? wizard as plain text, as a file (this is useful for launching instances using the Why are trials on "Law & Order" in the New York Supreme Court? In this case, it will be an EC2 instance store ). It should not stuck on modules:config. These things include: apt upgrade should be run on first . cloud-init, see http://cloudinit.readthedocs.org/en/latest/index.html. With describe-instance-attribute, the AWS CLI does not perform base64 decoding of the user data for you. 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 we get some information on the security group which was created called launch-wizard-1. That means all you need is the parameter UserData of AWS::EC2::Instance resource type. The property UserData must be a base64-encoded text. 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. Is there a proper earth ground point in this switch box? AWS EC2 userdata on Windows - Cloud for the win! Why are Suriname, Belize, and Guinea-Bissau classified as "Small Island Developing States"? I checked the system logs and saw my echoed string. check that the security group you are using contains a rule to allow HTTP (port 80) traffic. For more information, see Add rules to a security group. (/test-userscript/userscript.txt) and writes Created by bash shell script Also, because the With modify-instance-attribute, the AWS CLI does not perform base64 encoding of the user data for you. Run commands on your Windows instance at launch User data formats# User data that will be acted upon by cloud-init must be in one of the following types. For information Guide to running EC2 User Data scripts as a non-root user? 2. AWS user-data is not getting executed by terraform - Google Groups After that, change your user_data parameter to use the file instead of the string. In this example, there is only one line to be run, which is /bin/echo "Hello World." Well, there is a small catch, which if not known can be a time waster for you. You can specify instance user data when you launch the instance. A simple web page is created to test the web server and PHP engine. I'm having problems with modifying the user data or running user data scripts on my Amazon Elastic Compute Cloud (Amazon EC2) Windows instance. Before you can use this file with the AWS CLI, you must remove the first (BEGIN CERTIFICATE) and last If we are using user interactive commands like. Run commands on your Linux instance at launch Create an EC2 Instance With EC2 User Data Script To Launch Website located in the Advanced details section of the launch instance Setting up a Node.js app on a Linux AMI on an AWS EC2 instance with Nginx | by Nishank Jain | Medium 500 Apologies, but something went wrong on our end. If you have Mac or Linux or Windows 10 then you can use the .pem format. rm /var/lib/cloud/instance/sem/config_scripts_user. To make it recognize as first boot, you need to clean the cache of cloud-init on the Instance you generate the custom AMI from and also make sure you enable NoReboot option because if a reboot happens then cache will be repopulated before creating the custom AMI, so your custom AMI would arrive with a cache already showing that this is not the first boot but a subsequent one. amazon ec2 - user data scripts not working for me during starting of What is the correct way to screw wall and ceiling drywalls? Copy your user script into the Edit user data box, and then choose Save. If you use HTTPS, this is not going to work and its going to give you an infinite loading screen. operating system of your instance. #cloud-config line at the top is required in order to 6. The following example shows how to specify a script as a string on the command line: The following example shows how to specify a script using a text file. There are cases where I'd like to delete this state file so that the user data script will run again. I started a new Amazon Linux AMI and used your User Data, plus a bit extra: User Data scripts are executed as root, so it should have permission to create files in any location. procedure. You can distribute load across machines( Elastic Load Balancer), You can scale services using an auto-scaling group or ASG. You can useYAMLorJSONfor your template. The text/cloud-config content type overrides how frequently user data is run in the cloud-init package by setting the SCRIPTS-USER parameter to ALWAYS. Asking for help, clarification, or responding to other answers. For more document.getElementById("ak_js_1").setAttribute("value",(new Date()).getTime()); Get awesome AWS learning material delivered straight to your inbox. Is it plausible for constructed languages to be used to affect thought and control or mold people towards desired outcomes? script is passed, although the syntax is different. Is there a proper earth ground point in this switch box? But, the very last bash command in the script is supposed to start a python script which will run (indefinitely/ or however long I decide to keep it running). Continue to add echo before each command and confirm how far it's running, This was a lifesaver for me - thanks. Automate Your EC2 Instance Setup with EC2 User Data Scripts The first security group created will be called launch-wizard-1 which is created by the console directly and we can define multiple rules here. Step 5. Notify me of follow-up comments by email. in the Amazon EC2 User Guide for Windows Instances. The following is example output with the user data base64 encoded. While the instance is in a stopping state and if we try to refresh our webpage its not going to work because you dont have the server running anymore. Step 7. 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. Is a collection of years plural or singular? I'm using CentOS and the logic for userdata there is simple: In the file /etc/rc.local there is a call for a initial.sh script, but it looks for a flag first: initial.sh is the file that does the execution of user-data, but in the end it deletes the flag. The permissions you In my case, I have also tried removing /var/lib/cloud directory, but still it failed to execute user-data in our scenario. sudo cloud-init init Thanks for letting us know we're doing a good job! Additionally, you will also needscloudformation:*as well to be able to do CloudFormation stack creation, updation etc. For our example, in a web browser, enter the URL of the PHP test By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. Add a local rdp user via user data at launch of a Windows EC2 instance. You need to allow port 80 (HTTP) and port 443 (HTTPS) in outbound SG rules - destination 0.0.0.0/0. But dont worry, If you want it in JSON, I will provideJSONtemplate as well. You can follow these steps to install both node and npm. command as follows: To retrieve the user data for an instance, use the describe-instance-attribute command. but noticed I was getting it with the quotes still in it. Step 4. Subscribe to our newsletter below to get awesome AWS learning materials delivered straight to your inbox. Instance types are going to differ based on the number of CPUs they have, the amount of memory they have, and how much they cost. How do I connect these two faces together? The current state of the instance. There is an official documentation page now.. After all the attempts this finally worked for me.. When you create an Amazon EC2 instance, you choose an Amazon Machine Image (AMI) that contains an operating system and any additional software you need. This means I also need to declare my template file like so: But I was still getting an error in the cloud init logs Open the Amazon EC2 console. This is what I got: I suspect that the first 'sudo su'. Log EC2 Linux user data and send it to the console log when running I searched a lot of topic about "user-data script is not working" in these few days, but until now, I haven't gotten any idea about my case yet, please help me to figure out what happened, thanks a lot! It's not needed. then complete the instance launch procedure. create will be owned by the root user; if you need a non-root user to have file access, Stop instance. Especially if you are managing large scale enterprise accounts that have 100's of EC2 instances. https://console.aws.amazon.com/ec2/. Server Fault is a question and answer site for system and network administrators. Step 11. I start an instance from a custom AMI, and specify a UserData script during launch configuration. This URL is the public DNS address of your instance 4. but they used for linux based Ec2 instance. Supported browsers are Chrome, Firefox, Edge, and Safari. wizard. Introduction to AWS Simple Storage Service (AWS S3), AWS DynamoDB - Insert Data Using AWS Lambda. (Optional) If your script did not accomplish the tasks you were expecting For linux, I suppose the mechanism is the same, and user_data needs to be re-activated on your custom image. About an argument in Famine, Affluence and Morality. Replacing broken pins/legs on a DIP IC package. The second option is to use an EBS volume as a root device. If you have Windows less than version 10, for example, Windows 7 or Windows 8, then you can use a .ppk format. How to get an AWS EC2 instance ID from within that EC2 instance? Be sure to use the file:// prefix to specify the file.

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