ec2 user data script not running

How are we doing? 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). I have raised the issue to AWS support but still I couldn't find exact reason/bug which affects it. What is a word for the arcane equivalent of a monastery? However, you can configure your user data script and cloud-init directives with a mime multi-part file. You can't find the user data logs. You dont need to SSH into your EC2 instance and run those command one by one. To keep data from instance store volumes, be sure to back it up to persistent storage. (Optional) If your script did not accomplish the tasks you were expecting check that the security group you are using contains a rule to allow HTTP (port 80) traffic. @c24w Those timestamps are misleading. Similar to other posts on this topic, we are going to install apache web server on an EC2 instance using EC2 User Data. 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. About an argument in Famine, Affluence and Morality. Do new devs get fired if they can't solve a certain bug? In the navigation pane, choose Instances. User data must be Base64-decoded when retrieved. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. feedback (such as yum update without the -y EC2 User Data Script: It is a bootstrap script to configure the instance at the first launch. The httpd service is started and turned on via This URL is the public DNS address of your instance You can read more about all that in the cloud-init Boot Stages docs section. On certain instances, you may see symlinks with the instance id at the above script location. 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 Counterspell prevent from any further spells being cast on a given turn. For more On a Windows computer, use the --query option to get the coded user data and the certutil command to but they used for linux based Ec2 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. Also on PSFTW Deploy SMA Server via Powershell DSC 7 years ago Hi, I'm currently sitting on my plane from Minneapolis to Dallas. base64 command to decode it. For information about running commands on your Windows instance at launch, see Run commands on your Windows instance at launch The User data field is located in User data doesn't run on subsequent reboots or starts. By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. Why are physically impossible and logically impossible concepts considered separate in terms of probability? By default, it is enabled to yes, which means that once we terminate our EC2 instance, then this volume is also going to be deleted. distributions. In this article, we will discuss how to run EC2 User Data scripts as a non-root user. Have a look on the script below in case you need that. The size of a string of length n after base64-encoding is ceil ( n /3)*4. If you preorder a special airline meal (e.g. 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. 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. With modify-instance-attribute, the AWS CLI does not perform base64 encoding of the user data for you. echo Run yum update -y. way to send instructions to an instance at launch. wizard. Modify the user data as needed, and then choose Save. With run-instances, the AWS CLI performs base64 encoding of I start an instance from a custom AMI, and specify a UserData script during launch configuration. Server Fault is a question and answer site for system and network administrators. If you find any issue, please fee free to reach me in comment section. Otherwise it may run in AMAZON Linux AMI , but itll not run in RHEL. created. For more How to update the powershell script in the user data.It will be helpful if you update the same. The current state of the instance. of cloud-init directives that run when the instance launches. The necessary web server, php, and mariadb 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. The #cloud-boothook solution is not working for me. Javascript is disabled or is unavailable in your browser. By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. 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. You can store data on virtual drives or EBS volumes. And in the Cloud, you can start and stop instances just as you wish. Learn more about Stack Overflow the company, and our products. 2. For additional debugging information, you can create a Mime multipart The code below is from the cloud init log file. Error using SSH into Amazon EC2 Instance (AWS). What's the best way to do this ? (END CERTIFICATE) lines. 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). How can I do that? Finally, well learn how to start, stop, and terminate our instance. Thanks for contributing an answer to Stack Overflow! 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 so, then user data is running. Asking for help, clarification, or responding to other answers. For security reasons, create an IAM policy to restrict the users who are allowed to add or remove user data through the ModifyInstanceAttribute API. (/var/log/cloud-init-output.log), and look for 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. I checked /var/lib/cloud/instance/user-data.txt, the file is exist and same as my user-data script. The type of network card do you want to attach to your EC2 instance, the speed of the card, and what kind of public IP do you want? By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. Step 9. EC2: can I provide default startup scripts to erase sensitive data in my AMI? It supports only the user_data key. Do you need billing or technical support? Bootstrapping means launching commands when the machine starts. 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. has finished successfully. How to make windows EC2 user data script run again on startup? Is there any way to find user-data execution logs for mac-ec2 similar to what we have for linux-ec2 (/var/log/cloud-init.log)? Find centralized, trusted content and collaborate around the technologies you use most. Running Docker on AWS EC2. You can use the AWS CLI to specify, modify, and view the user data for your instance. section and Create a security group. 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. 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. 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 To enable user data execution with EC2Launch (Windows Server 2016 or later) Connect to your Windows instance. to that file. so User data will be executed If your AMI is a snapshot of the machine ( lift and Shifted from. I start up a few long running processes with this script, and would like them to be non-privileged processes. > "C:\Python27\Scripts" by shift button and right click. This means I also need to declare my template file like so: But I was still getting an error in the cloud init logs 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. The longer you leave it running, the more youre going to pay. UPDATE: I removed the sudo su and added an echo command for debugging. A limit involving the quotient of two sums, "We, who've been connected by blood to Prussia's throne and people since Dppel". Enter your shell script in the User data field, and information about cloud-init data formats and creating Mime 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. its user data. and the files contained within it. 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. If the instance is and Manage Windows instance configuration in the It is to automate boot tasks such as. Is it plausible for constructed languages to be used to affect thought and control or mold people towards desired outcomes? But dont worry, If you want it in JSON, I will provideJSONtemplate as well. The User data field is examine the cloud-init output log file (/var/log/cloud-init-output.log), I want to get an output (success or failure) back from EC2 and based on the result start an appropriate step function. Replacing broken pins/legs on a DIP IC package. If you preorder a special airline meal (e.g. For more information and examples of script syntax, see. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. What's the difference between a power rail and a signal line? Please refer to your browser's Help pages for instructions. 7. Staging Ground Beta 1 Recap, and Reviewers needed for Beta 2, AWS - UserData is not executed for instance created from custom image. sudo cloud-init init 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. 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). If this option is disabled, either the instance is already stopped or its root device is an instance store volume. launched; most notably, it configures the .ssh/authorized_keys For this example, in a web browser, enter the URL of the PHP test file the directives 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. EC2 User Data scripts run with a root user. It should not stuck on modules:config. Stop your instance. Or, you can pass user data to run scripts after the instance starts. Often times that actions that an. EC2 User Data Script is not running the last bash command which starts a python file on startup. script is not run interactively, you cannot include commands that require user This will install node version 4.4.5. Asking for help, clarification, or responding to other answers. data field, and then complete the instance launch The instance state is running. Note that the encoded output is stored in a file and the decoded output By default, cloud-init allows only one content type in user data at a time. Does a summoned creature play immediately after being summoned by a ready action? Click here to return to Amazon Web Services homepage. All rights reserved. use with Amazon Linux 2, and the commands and directives may not work for other Linux Does a barbarian benefit from the fast movement ability while wearing medium armor? How do I connect these two faces together? You can also pass this data into the launch instance When prompted for confirmation, choose Stop. information, see Auto-assign Public IP in the Network settings Be sure to use the file:// prefix to specify the file. Why are Suriname, Belize, and Guinea-Bissau classified as "Small Island Developing States"? is stored in another file. Now, we know the basics and we have the template so lets go and create the stack. 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. Then you need to choose a key pair type (RSA encrypted or ED25519 encrypted), here well be using the RSA encrypted. Amazon EC2 is one of the most popular AWS offerings. Step 5. You can put your script in /etc/rc.local, which will run the script on every reboot. file:// prefix to specify the file. Bootstrapping means launching commands when the machine starts. Short story taking place on a toroidal planet or moon involving flying. Step 4. 5. Choose Actions, choose Instance Settings, and then choose Edit User Data. @LechMigdal Yes I did, i don't really see any error, should I post the output here? Amazon Linux instances, see cloud-init.

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