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

And in programming, when you do something for the first time, you usually say hello world. 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. How to react to a students panic attack in an oral exam? Specify User Data while launching EC2 Instance Launch an EC2 instance with Linux 2 AMI. Why are Suriname, Belize, and Guinea-Bissau classified as "Small Island Developing States"? To subscribe to this RSS feed, copy and paste this URL into your RSS reader. This forum is for issues related to parallel processing and OpenSees using the new interpreters OpenSeesSP and OpenSeesMP. 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. I have an EC2 instance which I bootstrapped with some user data that runs some updates and installs some other software on startup. This means I also need to declare my template file like so: But I was still getting an error in the cloud init logs About user data and how it lets you bootstrap instance, A catch regarding specifying user data correctly. Bootstrapping means launching commands when the machine starts. Can you explain what this is supposed to do? > "C:\Python27\Scripts" by shift button and right click. Ref: https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/user-data.html#user-data-shell-scripts. section and Create a security group. Is it possible to create a concave light? You can specify below user data to achieve that. 2023, Amazon Web Services, Inc. or its affiliates. Click here to return to Amazon Web Services homepage. following tasks are performed by the user data: The distribution software packages are updated. In this example, there is only one line to be run, which is /bin/echo "Hello World." Do new devs get fired if they can't solve a certain bug? EC2 User Data scripts run with a root user. It seems that different users have different experiences. sudo cloud-init modules -m final followed by a forward slash and the file name. You should allow a few If you have Mac or Linux or Windows 10 then you can use the .pem format. Is it suspicious or odd to stand by the gate of a GA airport watching the planes? Have a look on the script below in case you need that. wizard as plain text, as a file (this is useful for launching instances using the On Windows, you can use the AWS Tools for Windows PowerShell instead of using the AWS CLI. Use exact command. If the root Asking for help, clarification, or responding to other answers. My added wrinkle is that I'm using terraform to instantiate the hosts via a launch configuration and autoscaling group. 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). As I tested, there were some bootstrap data in /var/lib/cloud directory. For more So, that EC2 User data script is only run once and when it first starts, and then will never be run again. At least that's how it is in Linux, I guess on Windows it would be similar. The following are common issues that occur when utilizing Windows EC2 instance user data: You modified or configured user data, but it doesn't run on instance launch. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. To Your email address will not be published. Its because If you stop an instance and then you start it, later on, AWS changes its public IPv4 address. ncdu: What's going on with this second size column? 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. When launching an EC2 Windows instance, you can pass user data to the instance that can be used to perform automated configuration tasks. It should not stuck on modules:config. This is the way to do Infrastructure as a Service on AWS. 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 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. For more information, see Add rules to a security group. After that, change your user_data parameter to use the file instead of the string. Thanks for contributing an answer to Stack Overflow! Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide. We also get some information about hostname, private DNS, Instance type, AMI details, and Key pair. get node js installed, and at the same time install git. Not sure why you have it there. How much random access memory or RAM do you want? This will install node version 4.4.5. AWS EC2 userdata on Windows | Cloud for the win! Introduction to AWS Simple Storage Service (AWS S3), AWS DynamoDB - Insert Data Using AWS Lambda. How can I utilize user data to automatically run a script with every restart of my Amazon EC2 Linux instance? Awesome content. You can distribute load across machines( Elastic Load Balancer), You can scale services using an auto-scaling group or ASG. Or, you can pass user data to run scripts after the instance starts. Adding these tasks at boot time adds to the amount of time it takes to boot an A limit involving the quotient of two sums, "We, who've been connected by blood to Prussia's throne and people since Dppel". 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. On a Windows computer, use the --query option to get the coded user data and the certutil command to So the EC2 User Data has a very specific purpose. 7. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. Well, there is a small catch, which if not known can be a time waster for you. so User data will be executed If your AMI is a snapshot of the machine ( lift and Shifted from. Amazon Elastic Compute Cloud (Amazon EC2) is a web service that allows you to rent virtual servers, also known as instances, on which you can run your applications. An instance profile provides the Be sure to delete the user data scripts from Also, there's no need for sudo in userdata as it's already running as root. You can access the log files at the following locations: EC2Launch v2: C:\ProgramData\Amazon\EC2Launch\log\agent.log, EC2Launch: C:\ProgramData\Amazon\EC2-Windows\Launch\Log\UserdataExecution.log, EC2Config: C:\Program Files\Amazon\Ec2ConfigService\Logs\Ec2ConfigLog.txt. All rights reserved. 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. 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. before you create an AMI from the instance. If so, then user data is running. The Amazon EC2 console can perform the base64-encoding for you or accept base64-encoded input. Lets check the web server running on our instance. These instructions are intended for You can't find the user data logs. Please help us improve AWS. command line tools), or as base64-encoded text (for API calls). 1. By default, cloud-init allows only one content type in user data at a time. For additional debugging information, you can 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. Grab the YAML or JSON template from above as per your convenience. 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. to that file. 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. A simple web page is created to test the web server and PHP engine. Step 3. We can see our EC2 instance is running but if we dont need it, we can go to the instance state and then click on stop instance. Have you checked your SGs and NACL configurations? Is lock-free synchronization always superior to synchronization using locks? Wait you saw the echo output in the logs? Before taking AMI remove /var/lib/cloud directory (each time). By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. 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. The current state of the instance. Or, I want to view the user data logs but don't know where they are. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. running, you can view the user data but you cannot modify it. The script is not deleted after it is run. information about cloud-init data formats and creating Mime Step 9. Do roots of these polynomials approach the negative of the Euler-Mascheroni constant? For security reasons, create an IAM policy to restrict the users who are allowed to add or remove user data through the ModifyInstanceAttribute API. So the first rule we want to have is to allow SSH traffic from anywhere and to allow HTTP traffic from the internet. 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 file to include both a shell script and cloud-init directives in your user data. your user data, and then check to see that your directives have completed On services, tab search for EC2 and click on instances in the sidebar for creating an EC2 Instance. multi part archive, see cloud-init Formats. UserData is still not running. How to Attach EBS Volume in EC2 Instance? I'm glad this was encouraged on serverfault. 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? These things include: apt upgrade should be run on first . Most of the entries in the NAME column of the output from lsof +D /tmp do not begin with /tmp. It is to automate boot tasks such as. How to Pass the Query String Parameters to AWS Lambda Function or HTTP Endpoint? Click here to return to Amazon Web Services homepage, back up any data on the instance store volumes, Determine the root device type of your AMI, Stopping and starting the instance erases any data on, If your EC2 instance has an auto-assigned public IPv4 address, then stopping and starting the instance causes the IPv4 address to change. Follow Up: struct sockaddr storage initialization by network format-string. We used the public IP address to access it, but we have the private IP address showing up on the website. Supported browsers are Chrome, Firefox, Edge, and Safari. Below are some of the key attributes for user data stated on the AWSwebsite. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. Do I need a thermal expansion tank if I already have a pressure tank? Do I need a thermal expansion tank if I already have a pressure tank? In this article, we will discuss how to run EC2 User Data scripts as a non-root user. The above code is a shell script. Not the answer you're looking for? Note that the encoded output is stored in a file and the decoded output EC2 User Data Script is not running the last bash command which starts a python file on startup. For more more information, see IAM roles for Amazon EC2. 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. Moderator: selimgunay. 169.254.169.254/latest/meta-data/instance-id)/sem/, aws.amazon.com/premiumsupport/knowledge-center/, How Intuit democratizes AI development across teams through reusability. The cloud-init package configures specific aspects of a new Amazon Linux instance when it is command. You need to allow port 80 (HTTP) and port 443 (HTTPS) in outbound SG rules - destination 0.0.0.0/0. User data doesn't run on subsequent reboots or starts. script is passed, although the syntax is different. Dear reader, In this post, I will help you execute EC2 user data scripts using CloudFormation. If you preorder a special airline meal (e.g. "UNPROTECTED PRIVATE KEY FILE!" I want to utilize user data to run a script every time my Amazon Elastic Compute Cloud (Amazon EC2) instance is restarted. You should see the PHP information page. What video game is Charlie playing in Poker Face S01E07? I want to get an output (success or failure) back from EC2 and based on the result start an appropriate step function. For more information about How To Use Recovery Mode On Android Smartphones? You can store data on virtual drives or EBS volumes. User data must be Base64-decoded when retrieved. You can update your configuration to ensure that your user data scripts and cloud-init directives run every time you restart your instance. rev2023.3.3.43278. In the navigation pane, choose Instances. You should see the PHP information page. Then you need to choose a key pair type (RSA encrypted or ED25519 encrypted), here well be using the RSA encrypted. There is a private IPv4 address which is how to access that instance internally on the AWS network, which is private. I have specified * for simplicity. 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. You can specify instance user data when you launch the instance. Do you need billing or technical support? To keep data from instance store volumes, be sure to back it up to persistent storage. How can I do 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. It should end with something like modules:final to make your user-data run. The property UserData must be a base64-encoded text. 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 allow a few minutes of extra time for the tasks to complete If you retrieve the data using instance metadata or the Amazon EC2 console, then it's automatically decoded for you. And in the Cloud, you can start and stop instances just as you wish. completed without errors, connect After I cleared that directory, User Data script worked normally. Why are physically impossible and logically impossible concepts considered separate in terms of probability? You can use the AWS CLI to specify, modify, and view the user data for your instance. For security reasons, create an IAM policy to restrict the users who are allowed to add or remove user data through the ModifyInstanceAttribute API. If you're interested in more complex automation scenarios, you might consider AWS CloudFormation or errors, connect to the instance, In this template, we are launching an EC2 instance with user data specified. Refresh the page, check Medium 's site. Start your EC2 instance again, and validate that your script runs correctly. First, enter a name tag for the instance. Use the --attribute and --value parameters to use the encoded text file EC2 - Instance user data fail - [WARNING]: Failed to run module scripts-user. I checked the system logs and saw my echoed string. (Optional) If your directives did not accomplish the tasks you were So, therefore, you need to copy the new IPv4 and make sure to use HTTP to have access back to our EC2 instance. How do I run a command on a new EC2 Windows instance at launch? view the log file, connect to the instance Run commands on your Linux instance at launch, Run commands on your Windows instance at launch. Makes sure that your instance is sitting in a public subnet (with route to IGW) and it has public/Elastic IPv4 attached to it. And then we have to select key pair formats. Step 4. I start up a few long running processes with this script, and would like them to be non-privileged processes. Here is the startup script that I have used for the user-data of the EC2 instance that we will deploy on AWS.