ec2 user data script not running

operating system of your instance. For more Follow Up: struct sockaddr storage initialization by network format-string. User data is treated as opaque data: what you give is what you get back. So our web server is saying hello world from an IP address here, which is not the public IP. Do new devs get fired if they can't solve a certain bug? For more information, see Using instance profiles in the IAM User Guide. I could NOT get it to work by adding the script inline in lc.tf. If the instance is Not the answer you're looking for? Thank you. in the AWS Knowledge Center. We're sorry we let you down. It only takes a minute to sign up. If you have Mac or Linux or Windows 10 then you can use the .pem format. adds to the amount of time it takes to boot the instance. You can distribute load across machines( Elastic Load Balancer), You can scale services using an auto-scaling group or ASG. Why are physically impossible and logically impossible concepts considered separate in terms of probability? your user data, and then check to see that your directives have completed When a user data script is processed, it is copied to and run from 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. Connect and share knowledge within a single location that is structured and easy to search. Making statements based on opinion; back them up with references or personal experience. You can useYAMLorJSONfor your template. https://console.aws.amazon.com/ec2/. I was having a lot of trouble with this. EC2 AMI version. For security reasons, create an IAM policy to restrict the users who are allowed to add or remove user data through the ModifyInstanceAttribute API. to that file. 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). In this article, we will discuss how to run EC2 User Data scripts as a non-root user. Choose Actions, Instance State, Stop. 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. Then you > should type "pip install StarCluster". 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 are unable to see the PHP information page, By default, user data scripts and cloud-init directives run only during the boot cycle when you first launch an instance. 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? flag). I hope you found this post helpful. The commands to be included in the user-data will be shell commands, more specifically, bash. By default, user data scripts and cloud-init directives run only during the first boot cycle when an EC2 instance is launched. 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. How to get an AWS EC2 instance ID from within that EC2 instance? 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. Do not leave any white space at the start of the line . It will execute the script on the first launch of our EC2 instance and only on the first launch. One important thing to note here is the delete on termination should be Yes. About an argument in Famine, Affluence and Morality. . EC2 - Instance user data fail - [WARNING]: Failed to run module scripts-user. Where is it? The Amazon EC2 console can perform the base64-encoding for you or accept base64-encoded input. Example userdata file would be like: This will make userdata script to execute on last step of every boot process. The #cloud-boothook solution is not working for me. Bootstrapping means launching commands when the machine starts. If I add #cloud-boothook in the top of user-data file, it works! 4. For our example, in a web browser, enter the URL of the PHP test 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). error messages in the output. So your force-user-data.sh will look something like, #!/bin/bash So let's go ahead and see the step by step instruction to execute EC2 user data script using CloudFormation Step 1: Provide proper permission If you are not an admin user, you should explicitly provide ec2:* permission for your user/role. Is it plausible for constructed languages to be used to affect thought and control or mold people towards desired outcomes? CloudFormation provides a real simple way to do it on the go while specifying your user data using function Fn::Base64 ike you can see below. The user data are stored in files name part_001 etc. sudo rm -rf /var/lib/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. EC2: can I provide default startup scripts to erase sensitive data in my AMI? Error using SSH into Amazon EC2 Instance (AWS). /var/lib/cloud/instances/instance-id/ 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. With run-instances, the AWS CLI performs base64 encoding of So the first rule we want to have is to allow SSH traffic from anywhere and to allow HTTP traffic from the internet. Step 6. Especially if you are managing large scale enterprise accounts that have 100's of EC2 instances. Thanks for contributing an answer to Stack Overflow! sudo cloud-init init 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. The necessary web server, php, and mariadb The cloud-init package configures specific aspects of a new Amazon Linux instance when it is I start up a few long running processes with this script, and would like them to be non-privileged processes. User_data is run only at the first start up. and look for error messages in the output. 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. Find centralized, trusted content and collaborate around the technologies you use most. EC2 User Data Script: It is a bootstrap script to configure the instance at the first launch. a few minutes for the instance to stop. AWS EC2 userdata on Windows | Cloud for the win! 2023, Amazon Web Services, Inc. or its affiliates. Then, the file runs the user script. wizard. To delete the existing user data, use the modify-instance-attribute Note: If Stop is not activated, either the instance is already stopped, or its root device is an instance store volume. Wait you saw the echo output in the logs? Open the Amazon EC2 console at https://console.aws.amazon.com/ec2/. create will be owned by the root user; if you need a non-root user to have file access, But the user-data script is working if I launch an new instance with Amazon linux(2014.09.01), but I'm not sure what difference between my AMI (based on Amazon linux) and Amazon linux. Select the instance and choose Instance state, You should see the PHP information page. Make sure that the latest version of cloud-init is installed and functioning properly on your EC2 instance. and open /var/log/cloud-init-output.log. Connecting an AWS EC2 Instance of a Private Subnet using Bastion Host, Allocate Elastic IP-Address to EC2 Instance in AWS. @LechMigdal Yes I did, i don't really see any error, should I post the output here? Note: It's a best practice to create a snapshot of your instance before proceeding with the following resolution. information, see Auto-assign Public IP in the Network settings Before you can use this file with the AWS CLI, you must remove the first (BEGIN CERTIFICATE) and last Lets check the web server running on our instance. About user data and how it lets you bootstrap instance, A catch regarding specifying user data correctly. I'm glad this was encouraged on serverfault. of cloud-init directives that run when the instance launches. When prompted for confirmation, choose Stop. instance. communities including Stack Overflow, the largest, most trusted online community for developers learn, share their knowledge, and build their careers. get node js installed, and at the same time install git. This is what I got: I suspect that the first 'sudo su'. check that the security group you are using contains a rule to allow HTTP (port 80) traffic. Write for Us Cloud Computing | AWS | Cyber Security | DevOps | IoT, How to Install Apache Web Server on EC2 Instance, Using User Data Script to Bootstrap Your Instance, How to Launch an EC2 Instance in AWS Step by Step, Understand IAM PassRole to Secure your AWS Infrastructure, Attach an IAM Role to an EC2 Instance using CloudFormation, AWS EC2 instance Purchasing Options: All you need to know, Install Apache Web Server on a EC2 instance in AWS, How to Setup Budget in AWS to Keep your Bill in Check, 4 Main Factors to Consider When Choosing Your AWS Region, Subscribe an SQS Queue to an SNS Topic using CloudFormation, Send SNS Notification from AWS Lambda using Python Boto3, How to Create EC2 Instance using Terraform with Key Pair on AWS, How to Create Key Pair in AWS using Terraform in Right Way, How to Create IAM Role in AWS using Terraform. 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. For additional debugging information, you can create a Mime multipart 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. traffic so that you can connect to the instance to view the output log files. If you preorder a special airline meal (e.g. For a great introduction on shell scripting, see 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. At least that's how it is in Linux, I guess on Windows it would be similar. It is a bootstrap script to configure the instance at the first launch. User data and the Tools for Windows PowerShell For more Navigate to EC2 instance, grab the instance public IP from instance details screen and hit the pubic IP. Thanks for answer, sorry about that, the /home/ec2-user/user-script/output.txt is typo, already fixed it, for now I still don't know why it doesn't work if I remove #cloud-boothook, still trying to figure out, User-data scripts is not running on my custom AMI, but working in standard Amazon linux, How to make EC2 user-data work on freshly built AMI, made with Packer, aws.amazon.com/premiumsupport/knowledge-center/, this article about user data formatting user, https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/user-data.html#user-data-shell-scripts, How Intuit democratizes AI development across teams through reusability. User-Data used in this post. How to Provide the Static IP to a Docker Container? By using our site, you Next, create a key pair to log into your instance. When you create a key pair it will be downloaded automatically to your pc. Connect and share knowledge within a single location that is structured and easy to search. Is it possible to rotate a window 90 degrees if it has the same length and width? How much compute power and cores do you want on this virtual machine i.e. This means I also need to declare my template file like so: But I was still getting an error in the cloud init logs Thanks for contributing an answer to Stack Overflow! (/var/log/cloud-init-output.log), and look for You should see the PHP information page. I am trying to check everywhere, in the cloudlog init file to find some error why my user data is not working. (/test-userscript/userscript.txt) and writes Created by bash shell script User data must be Base64-decoded when retrieved. forward slash and the file name. To update the instance user data, you must first stop the instance. volume of the instance is an EBS volume, you can also stop the instance and update 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. I have added below line in /etc/rc.local to make it happen. Once stack is successfully created, you can check . Therefore, always remeber to base64-encode your user data script while specifying your user data. 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. Some are able to get it to work without it, not sure why. however, user data scripts are not run. My code is GPL licensed, can I issue a license to have my code be distributed in a specific MIT licensed project? For more to the instance, examine the output log file sudo rm -f /home/ubuntu/force-user-data.sh A-143, 9th Floor, Sovereign Corporate Tower, We use cookies to ensure you have the best browsing experience on our website. Is there a proper earth ground point in this switch box? If you use an AWS API, including the AWS CLI, in a user data script, you must use an 5. And in programming, when you do something for the first time, you usually say hello world. Is it possible to rotate a window 90 degrees if it has the same length and width? 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. This one is free tier eligible, so it will be free to launch them. the Advanced details section of the launch instance All rights reserved. Note that the encoded output is stored in a file and the decoded output 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. Staging Ground Beta 1 Recap, and Reviewers needed for Beta 2, AWS - UserData is not executed for instance created from custom image. I checked the network monitoring and indeed the script is not being run. has finished successfully. I don't have much idea whether above commands will work on CentOS or not. 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 code below is from the cloud init log file. /var/lib/cloud/instances/instance-id/. 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. If we are using user interactive commands like. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. If this option is disabled, either the instance is already stopped or its root device is an instance store volume. command. Refresh the page, check Medium 's site. Not the answer you're looking for? If you your AMI is created from AWS AMIs, Ec2-user has full permissions including sudo. Start your EC2 instance again, and validate that your script runs correctly. Is there a proper earth ground point in this switch box? The following is an example text file with a shell script. assign to the IAM role depend on which services you are calling with the API. This will install node version 4.4.5. Be sure to use the sudo cloud-init modules -m final If the root you should modify the permissions accordingly in the script. rm /var/lib/cloud/instances/*/sem/config_scripts_user. Amazon Linux instances, see cloud-init. 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. Open the Amazon EC2 console, and then select your instance. Short story taking place on a toroidal planet or moon involving flying. 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 have raised the issue to AWS support but still I couldn't find exact reason/bug which affects it. Follow the procedure for launching an In this article, we are going to pass below code. You can put your script in /etc/rc.local, which will run the script on every reboot. Also tailf /var/log/cloud-init-output.log for cloud-init status. Continue to add echo before each command and confirm how far it's running, This was a lifesaver for me - thanks. I would be more than happy to reply to your comment. to specify the user data. following directive: This directive sends command output from your script to The log files for EC2Launch v2, EC2Launch, and EC2Config contain the output from the standard output and standard error streams. How to Set Up Apache Web Server in AWS EC2 Linux (Ubuntu) Instance? AWS support for Internet Explorer ends on 07/31/2022. (END CERTIFICATE) lines. Cloud config data# Cloud-config is the simplest way to accomplish some things via user data. So this is necessary if we use the SSH utility to access our instance. For additional debugging information, you can After that, change your user_data parameter to use the file instead of the string. In my previous post, I talked about doing it via AWS console. Also, because the located in the Advanced details section of the launch instance 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. Where is it? The user data says to install apache web server on your instance. These instructions are intended for Does a barbarian benefit from the fast movement ability while wearing medium armor? Then while creating Image, set it to no-reboot. exit 0. I checked the system logs and saw my echoed string. then check to see that your script has completed the tasks that you intended. Dear reader, In this post, I will help you execute EC2 user data scripts using CloudFormation. If you click on it, copy, and then paste it, you press enter, its going to work. Paste the content of the user data script in a file named ec2-user-data.sh. @jarmod how can I echo it out? Amazon EC2 is one of the most popular AWS offerings. I checked /var/lib/cloud/instance/user-data.txt, the file is exist and same as my user-data script. And in the Cloud, you can start and stop instances just as you wish. Notify me of follow-up comments by email. Even though the server is running we cant able to see the message. 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. information about the configuration tasks that the cloud-init package performs for 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. we get some information on the security group which was created called launch-wizard-1. How to update the powershell script in the user data.It will be helpful if you update the same. 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.. Do I need a thermal expansion tank if I already have a pressure tank? This URL is the public DNS address of your instance botocore.exceptions.ParamValidationError: Parameter validation failed: Hi, Hi@Lakshminarayanan, views aws devops-tools devops aws-ec2 aws-s3 aws-api > > information, see Create a security group. This forum is for issues related to parallel processing and OpenSees using the new interpreters OpenSeesSP and OpenSeesMP. 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