ec2 user data script not running

Step 1. Then you need to choose a key pair type (RSA encrypted or ED25519 encrypted), here well be using the RSA encrypted. The user data are stored in files name part_001 etc. . 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? Step 2. /var/lib/cloud/instances/instance-id/ Connect and share knowledge within a single location that is structured and easy to search. information, see Auto-assign Public IP in the Network settings /var/log/cloud-init-output.log. Staging Ground Beta 1 Recap, and Reviewers needed for Beta 2. 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. Step 5. Enter your shell script in the User data field, and On certain instances, you may see symlinks with the instance id at the above script location. It is a bootstrap script to configure the instance at the first launch. There is an official documentation page now.. After all the attempts this finally worked for me.. Port 22 is accessible from everywhere and port 80 is accessible from everywhere. Why are non-Western countries siding with China in the UN? instance profile when launching the instance. These instructions are intended for Feel free to add a comment in case you need me to cover using CLI as well. I want to get an output (success or failure) back from EC2 and based on the result start an appropriate step function. You log clearly says that you don't have npm and node installed so you need to pass installation instruction to the script as well. Click here to return to Amazon Web Services homepage. If you go into advanced details you could configure them a little more advanced in terms of storage, volume, encryption, and keys. However, in some cases, it may be necessary to run these scripts as a non-root user, for security or other reasons. running, you can view the user data but you cannot modify it. Making statements based on opinion; back them up with references or personal experience. This worked for me on an Ubuntu, however I needed to run. User data doesn't run on subsequent reboots or starts. We could proceed without a key pair, but for now, lets go ahead and create a new key pair. In the navigation pane, choose Instances. Open the Amazon EC2 console. How do I align things in the following tabular environment? For more information about way to send instructions to an instance at launch. You can read more about all that in the cloud-init Boot Stages docs section. Cloud config data# Cloud-config is the simplest way to accomplish some things via user data. In configuration, keep everything as default and click on Next. All you need is to prefix this function before your userdata. EC2: can I provide default startup scripts to erase sensitive data in my AMI? check that the security group you are using contains a rule to allow HTTP (port 80) traffic. Staging Ground Beta 1 Recap, and Reviewers needed for Beta 2, AWS - UserData is not executed for instance created from custom image. AWS OpsWorks. assign to the IAM role depend on which services you are calling with the API. its user data. file for the ec2-user so you can log in with your own private key. A place where magic is studied and practiced? errors, connect to the instance, Also I checked the log in /var/log/cloud-init.log, there is no error message. 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 dont need to SSH into your EC2 instance and run those command one by one. Learn more about Stack Overflow the company, and our products. How to Pass the Query String Parameters to AWS Lambda Function or HTTP Endpoint? EC2 AMI version. 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. However, you can configure your user data script and cloud-init directives with a mime multi-part file. 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/. you should modify the permissions accordingly in the script. The appropriate ownership and file permissions are set for the web directory Introduction to AWS Simple Storage Service (AWS S3), AWS DynamoDB - Insert Data Using AWS Lambda. I could NOT get it to work by adding the script inline in lc.tf. First, enter a name tag for the instance. get node js installed, and at the same time install git. 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. Choose Actions, choose Instance Settings, and then choose Edit User Data. Subscribe to our newsletter below to get awesome AWS learning materials delivered straight to your inbox. However, you can use the If you stop an instance and then modify its user data, the updated user data isn't run when you start the instance. This means I also need to declare my template file like so: But I was still getting an error in the cloud init logs appropriate AWS credentials required by the user data script to issue the API Start the instance. Note: It's a best practice to create a snapshot of your instance before proceeding with the following resolution. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. In this case, it will be an EC2 instance store ). You modified or configured user data, but it doesn't run on instance launch. 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. EC2 User Data Script: It is a bootstrap script to configure the instance at the first launch. You can store data on virtual drives or EBS volumes. Ref: https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/user-data.html#user-data-shell-scripts. The #cloud-boothook make it works because it changes the script from a user_data mechanism to a cloud-boothook one that runs on each start. 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. Use the --attribute and --value parameters to use the encoded text file By using our site, you Your email address will not be published. That is launching new non-login root shell. Not the answer you're looking for? At a minimum, you should connect to the instance immediately after launch and change the password interactively. Step 7. So, that EC2 User data script is only run once and when it first starts, and then will never be run again. data. If the root 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. All rights reserved. sudo cloud-init init Is lock-free synchronization always superior to synchronization using locks? Select the instance and choose Instance state, If the instance is amazon-ec2 cloud-init Share Improve this question For windows, it can be done by checking a box in Ec2 Services Properties. Launching webpage created via User Data Script. How to react to a students panic attack in an oral exam? Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. How to get an AWS EC2 instance ID from within that EC2 instance? I've seen it downvoted many times on SO, In addition to @Mike Conigliaro response, in order to delete only the running one semaphore: rm /var/lib/cloud/instances/$(curl -s. @MikeConigliaro I wanted to use user-data to make something run on every boot, so I made the user-data script append it to /etc/rc.local. This is what I got: I suspect that the first 'sudo su'. User data is when we pass a script with some commands to our EC2 instance. What data is stored in Ephemeral Storage of Amazon EC2 instance? In the events tab of stack, you can view the status. 2. (END CERTIFICATE) lines. 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 see a full catalog of OS that you can search but in this article, were going to use Amazon Linux, which is provided by AWS. I do have script handy for that. and Manage Windows instance configuration in the For more The text/x-shellscript content type provides the actual user script to be run by the cloud-init cloud_final_modules module. You can distribute load across machines( Elastic Load Balancer), You can scale services using an auto-scaling group or ASG. section and Create a security group. If you finally want to get rid of this instance we can do an instance state and then terminate the instance. I was having a lot of trouble with this. The only different part I saw is if I run this script: cloud-init.noarch 0.7.2-8.33.amzn1 @amzn-main, cloud-init.noarch 0.7.2-8.33.amzn1 installed. Error using SSH into Amazon EC2 Instance (AWS), cloud-init per-boot script on ubuntu ec2-instance, CoreOS AWS userdata "docker run" on startup won't run, I am not able to copy S3 file to EC2 instance using Userdata in CloudFormation, How to run my own shell script inside user data in ec2 instance. 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. 7. The When you stop an instance, the data on any instance store volumes is erased. Not sure why you have it there. How do I connect these two faces together? By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. Grab the YAML or JSON template from above as per your convenience. Why don't you echo out some progress information in your userdata script, step by step, and then check the console output afterwards? If you're interested in more complex automation scenarios, you might consider AWS CloudFormation or EC2 User Data Script is not running the last bash command which starts a python file on startup. If you retrieve the data using instance metadata or the Amazon EC2 console, then it's automatically decoded for you. Navigate to EC2 instance, grab the instance public IP from instance details screen and hit the pubic IP. What can a lawyer do if the client wants him to be acquitted of everything despite serious evidence? It will execute the script on the first launch of our EC2 instance and only on the first launch. 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. You can useYAMLorJSONfor your template. If this option is disabled, either the instance is already stopped or its root device is an instance store volume. 6. >> /tmp/testfile.txt. In the navigation pane, choose Instances. 1. The Amazon EC2 console can perform the base64-encoding for you or accept base64-encoded input. EC2 User Data scripts run with a root user. Use exact command. The following example is a shell script that writes "Hello World" to a testfile.txt file in a /tmp directory. wizard. The cloud-init user directives can be passed to an instance at launch the same way that a You can put your script in /etc/rc.local, which will run the script on every reboot. Therefore, always remeber to base64-encode your user data script while specifying your user data. volume of the instance is an EBS volume, you can also stop the instance and update Why is this the case? Running Docker on EC2 using CodeCommit | by Dhaval Nagar | AppGambit | Medium Write Sign up Sign In 500 Apologies, but something went wrong on our end.. By default, cloud-init allows only one content type in user data at a time. If you are unable to see the PHP information page, Also, Before taking AMI remove /var/lib/cloud directory (each time). information about the configuration tasks that the cloud-init package performs for For information about running commands on your Windows instance at launch, see Run commands on your Windows instance at launch 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. 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. So how much CPU? Before you can use this file with the AWS CLI, you must remove the first (BEGIN CERTIFICATE) and last Commands wrapped in script tags are saved to a batch file, and commands wrapped in PowerShell tags are saved to a .ps1 file (corresponds to the User Data check box on the Ec2 Service Properties dialog box). 5. add the following line to your directives: This directive sends runcmd output to The best answers are voted up and rise to the top, Not the answer you're looking for? and look for error messages in the output. check that the security group you are using contains a rule to allow HTTP (port 80) traffic. 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. It supports only the user_data key. I start up a few long running processes with this script, and would like them to be non-privileged processes. So your force-user-data.sh will look something like, #!/bin/bash Can I specify the script somewhere in the AMI? operating system of your instance. Is it possible to create a concave light? Why are non-Western countries siding with China in the UN? This is a major lifesaver for trouble shooting user data issues. rev2023.3.3.43278. 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! How are we doing? For example, the following user data includes cloud-init directives and a bash shell script. I am trying to automate EC2 instance creation. To learn more, see our tips on writing great answers. 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. characters and scripts and cloud-init directives. Bootstrap script to configure the instance at first launch, which is called the EC2 User Data. 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. and writes Created by cloud-init to that file. is stored in another file. 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. I have specified * for simplicity. Does Counterspell prevent from any further spells being cast on a given turn. 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). How can I explain to my manager that a project he wishes to undertake cannot be performed by the team? decode it. 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. Why do small African island nations perform better than African continental nations, considering democracy and human development? Not sure which, but I was having no luck getting anything to work. cloud-init, see http://cloudinit.readthedocs.org/en/latest/index.html. The below script worked perfectly for me after the ubuntu ec2 instance was launched. Makes sure that your instance is sitting in a public subnet (with route to IGW) and it has public/Elastic IPv4 attached to it. error messages in the output. Step 2: Once the attacker gained access to the pod, the malware was able to perform two initial actions during execution : Launch a cryptominer in order to make money or provide a distraction. The above code is a shell script. Open the Amazon EC2 console at https://console.aws.amazon.com/ec2/. traffic so that you can connect to the instance to view the output log files. 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I will appreciate if someone can put some lights on why it is unable to execute the user-data. Step 9. So the EC2 User Data has a very specific purpose. 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. Allow enough time for the instance to launch and run the directives in A simple web page is created to test the web server and PHP engine. Otherwise, the script will exist in this You can also pass this data into the launch instance Not the answer you're looking for? command line tools), or as base64-encoded text (for API calls). How to get an AWS EC2 instance ID from within that EC2 instance? Do I need a thermal expansion tank if I already have a pressure tank? (Optional) If your directives did not accomplish the tasks you were It should not stuck on modules:config. http://cloudinit.readthedocs.org/en/latest/index.html, Combine shell scripts and cloud-init directives, Deploying applications document.getElementById("ak_js_1").setAttribute("value",(new Date()).getTime()); Get awesome AWS learning material delivered straight to your inbox. If we are using user interactive commands like. the BASH Thanks for letting us know this page needs work. For more information, see Add rules to a security group. When prompted for confirmation, choose Stop. packages are installed. The security group associated with your instance is configured to allow SSH (port 22) Amazon Linux instances, see cloud-init. @jarmod how can I echo it out? @LechMigdal Yes I did, i don't really see any error, should I post the output here? https://console.aws.amazon.com/ec2/. User data formats# User data that will be acted upon by cloud-init must be in one of the following types.

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