ec2 user data script not runningsamantha wallace and dj self

User data runs as root anyway. The second option is to use an EBS volume as a root device. created. command. Here is the startup script that I have used for the user-data of the EC2 instance that we will deploy on AWS. Specify User Data while launching EC2 Instance Launch an EC2 instance with Linux 2 AMI. In this case, it will be an EC2 instance store ). 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. launched; most notably, it configures the .ssh/authorized_keys Can I specify the script somewhere in the AMI? So before you create custom AMI, ssh/ssm into your instance and execute the following, Optionally also remove the cloud-init logs, they will be recreated automatically. sudo cloud-init modules -m final. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. 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. If I add #cloud-boothook in the top of user-data file, it works! a few minutes for the instance to stop. 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. 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. How to get an AWS EC2 instance ID from within that EC2 instance? operating system of your instance. Now, we know the basics and we have the template so lets go and create the stack. and open /var/log/cloud-init-output.log. User data must be Base64-decoded when retrieved. If you preorder a special airline meal (e.g. Are there tables of wastage rates for different fruit and veg? Also tailf /var/log/cloud-init-output.log for cloud-init status. Warning: Before starting this procedure, review the following: 1. 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. On a Linux computer, use the base64 command to encode the user data. Also make sure that source/destination check is disabled on NAT instance if you are using it. And therefore, on the first launch, we shall be able to pass the commands here. In the navigation pane, choose Instances. Dear reader, In this post, I will help you execute EC2 user data scripts using CloudFormation. 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. Example userdata file would be like: This will make userdata script to execute on last step of every boot process. Amazon EC2 is one of the most popular AWS offerings. 1. Use exact command. For additional debugging information, you can create a Mime multipart Add a local rdp user via user data at launch of a Windows EC2 instance. To use the Amazon Web Services Documentation, Javascript must be enabled. If we go to security. The cloud-init output log file captures console output so it is easy to debug your I do have script handy for that. Continue to add echo before each command and confirm how far it's running, This was a lifesaver for me - thanks. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. 2. 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. to that file. You dont need to SSH into your EC2 instance and run those command one by one. The text/x-shellscript content type provides the actual user script to be run by the cloud-init cloud_final_modules module. /var/log/cloud-init-output.log. Step 8. scripts after the instance starts. Ref: https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/user-data.html#user-data-shell-scripts. Did any DOS compatibility layers exist for any UNIX-like systems before DOS started to become outmoded? The following shows the mime-multi part format. >> /tmp/testfile.txt. AWS support for Internet Explorer ends on 07/31/2022. The User data field is located in How to Pass the Query String Parameters to AWS Lambda Function or HTTP Endpoint? EC2 UserData script is not running on startup Ask Question Asked 1 year, 9 months ago Modified 7 months ago Viewed 2k times Part of AWS Collective 2 I am trying to automate EC2 instance creation. on Amazon EC2 with AWS CloudFormation in the AWS CloudFormation User Guide. First, enter a name tag for the instance. In my case, I have also tried removing /var/lib/cloud directory, but still it failed to execute user-data in our scenario. So the EC2 User Data has a very specific purpose. sudo rm -rf /var/lib/cloud/* Also I checked the log in /var/log/cloud-init.log, there is no error message. This is what I got: I suspect that the first 'sudo su'. If the instance is It only takes a minute to sign up. Stop your 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. The user data are stored in files name part_001 etc. has finished successfully. (/var/log/cloud-init-output.log), and look for Subscribe to our newsletter below to get awesome AWS learning materials delivered straight to your inbox. information about cloud-init data formats and creating Mime How to make windows EC2 user data script run again on startup? The security group associated with your instance is configured to allow SSH (port 22) So, that EC2 User data script is only run once and when it first starts, and then will never be run again. How do I align things in the following tabular environment? Choose Actions, Instance Settings, Edit User Data. The User data field is Rather all you need is to specify the whole script in the user data section and they get executed once your instance boots up. You can put your script in /etc/rc.local, which will run the script on every reboot. 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. Also, the limit on user data size is 16 KB. 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. To Asking for help, clarification, or responding to other answers. 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. Follow the procedure for launching an instance. the path to the interpreter you want to read the script (commonly The cloud-init directives creates a file (/test-cloudinit/cloud-init.txt), Then, the file runs the user script. Do you need billing or technical support? 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. I have an EC2 instance which I bootstrapped with some user data that runs some updates and installs some other software on startup. So the first rule we want to have is to allow SSH traffic from anywhere and to allow HTTP traffic from the internet. 3. Navigate to EC2 instance, grab the instance public IP from instance details screen and hit the pubic IP. All rights reserved. Finally, we can review everything we have created and launch this 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 For linux, I suppose the mechanism is the same, and user_data needs to be re-activated on your custom image. Do new devs get fired if they can't solve a certain bug? 2. data field, and then complete the instance launch in the AWS Knowledge Center. It actually corresponds to the private IPv4 address. text/cloud-config and text/x-shellscript content-types in a mime-multi part Is there a proper earth ground point in this switch box? 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 Port 22 is accessible from everywhere and port 80 is accessible from everywhere. For Next, you need to choose a base image for your EC2 instance i.e. Find centralized, trusted content and collaborate around the technologies you use most. 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. I was having a lot of trouble with this. Be sure to use the file:// prefix to specify the file. We're sorry we let you down. With modify-instance-attribute, the AWS CLI does not perform base64 encoding of the user data for you. and the files contained within it. 5. I have tested it on Ubuntu. How much random access memory or RAM do you want? If you have Mac or Linux or Windows 10 then you can use the .pem format. 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. The best answers are voted up and rise to the top, Not the answer you're looking for? You also need to allow the same on outbound NACL's rules and ephemeral ports on inbound rules. User data and the Tools for Windows PowerShell Launch the EC2 Instance in AWS with New Instance Wizard, Create a Windows EC2 Instance and Connect Using RDP, Amazon Web Services - Denying Access using IAM policy for EC2 and EBS Instance, Amazon Web Services - Replacing Unhealthy EC2 Instance in Elastic Beanstalk Environment, Amazon VPC - Launching an EC2 Instance into a VPC. Thank you. 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. Bootstrap script to configure the instance at first launch, which is called the EC2 User Data. For more information, see Add rules to a security group. Ec2HandleUserDataCreates and runs scripts created by the user on the first launch of an instance after Sysprep is run. The Amazon EC2 console can perform the base64-encoding for you or accept base64-encoded input. Awesome content. file for the ec2-user so you can log in with your own private key. the tasks you intended. User data doesn't run on subsequent reboots or starts. information, see Auto-assign Public IP in the Network settings Step 7. But if you decide to stop an instance, then AWS will not bill you for it. An EC2 instance may be launched with a choice of two types of storage for its boot disk or "root device." The first option is a local "instance-store" disk as a root device (originally the only choice). You can find this in the EC2 documentation under Run commands at launch. You should see the PHP information page. There is a private IPv4 address which is how to access that instance internally on the AWS network, which is private. With the instance still selected, choose Actions, running, you can view the user data but you cannot modify it. How to get an AWS EC2 instance ID from within that EC2 instance? If you stop an instance and then modify its user data, the updated user data isn't run when you start the instance. Connect and share knowledge within a single location that is structured and easy to search. You can useYAMLorJSONfor your template. Change parameters like ImageId, InstanceType and KeyName with your own AMI Id, instance type and name of keypair respectivey. You can't find the user data logs. 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. 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. 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. Save the template with .yml or .json as per the choice of template and follow below steps. AWS EC2 userdata on Windows | Cloud for the win! Knowing how to use EC2 in AWS is fundamental to understanding how the cloud works because the cloud is to be able to rent computers whenever you need, on-demand, and EC2 is just that. 2023, Amazon Web Services, Inc. or its affiliates. You can read more about all that in the cloud-init Boot Stages docs section. 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. User data is when we pass a script with some commands to our EC2 instance. Operating Systems that can we choose for our EC2 instances are Linux, Windows, or Mac OS. Supported browsers are Chrome, Firefox, Edge, and Safari. As your image is a custom one, I suppose it have already been started once and so user_data is desactivated. The command would understandably fail if you attempt to create a file in a non-existent directory, but your "Update" example seems to show that it did actually work. How to Provide the Static IP to a Docker Container? Use the --attribute and --value parameters to use the encoded text file 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! If you've got a moment, please tell us how we can make the documentation better. Once stack is successfully created, you can check . Managing EC2 as an AWS Administrator can be a very hectic job. The log files for EC2Launch v2, EC2Launch, and EC2Config contain the output from the standard output and standard error streams. Not the answer you're looking for? the user data for you. Stack Exchange network consists of 181 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers. Step 1: The attacker gained initial access by exploiting a public-facing service in a self-managed Kubernetes cluster hosted inside an AWS cloud account. For information It should end with something like modules:final to make your user-data run. I tried SQS, Event bridge, S3 SNS trigger. I'm glad this was encouraged on serverfault. sudo cloud-init modules -m final file the script created. I have also faced the same issue on Ubuntu 16.04 hvm AMI. I have noticed that UserData scripts are not being executed. view the log file, connect to the instance 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. There is a public IPv4 address, this is what were going to use to access our EC2 instance. user data is not running at launch aws ec2 Ask Question Asked 4 years ago Modified 4 years ago Viewed 4k times Part of AWS Collective 1 I am trying to launch an ec2 linux instance (linux 2 ami) and while doing that in the user data, I am trying to get node js installed, and at the same time install git. 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.. Staging Ground Beta 1 Recap, and Reviewers needed for Beta 2, AWS - UserData is not executed for instance created from custom image. There are cases where I'd like to delete this state file so that the user data script will run again. The current state of the instance. It should not stuck on modules:config. its user data. 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. 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. 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. Is there a proper earth ground point in this switch box? By default, EC2 User Data scripts are executed as the root user when an EC2 instance is launched. Is it suspicious or odd to stand by the gate of a GA airport watching the planes? It may be affecting execution of the existing shell, where user data is running. If you've got a moment, please tell us what we did right so we can do more of it. cloud-init, see http://cloudinit.readthedocs.org/en/latest/index.html. When a user data script is processed, it is copied to and run from Grab the YAML or JSON template from above as per your convenience. The ec2-user is added to the apache group. In each example, the Why are non-Western countries siding with China in the UN? "UNPROTECTED PRIVATE KEY FILE!" For more volume. User_data is run only at the first start up. 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. Be sure to use the 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. Most of the entries in the NAME column of the output from lsof +D /tmp do not begin with /tmp. Run EC2 user-data script as non-root user Ask Question Asked 10 years, 9 months ago Modified 3 years, 9 months ago Viewed 12k times 8 I'm able to run a user-data script successfully, but it runs as root. User data is treated as opaque data: what you give is what you get back. Start your EC2 instance again, and validate that your script runs correctly.

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