This is what I got: I suspect that the first 'sudo su'. Your email address will not be published. Enter your shell script in the User data field, and For more information and examples of script syntax, see. This is the way to do Infrastructure as a Service on AWS. 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. About an argument in Famine, Affluence and Morality. If you retrieve the data using instance metadata or the Amazon EC2 console, then it's automatically decoded for you. 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. If you use HTTPS, this is not going to work and its going to give you an infinite loading screen. If you are using a custom AMI and had UserData passed in the instance you generated the AMI from, then, the cloud-init per-instance(i.e., on first boot, in this case the UserData you pass when you create an instance from your custom AMI) section will not be executed as it does not recognize this as first boot. Managing EC2 as an AWS Administrator can be a very hectic job. 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. How much compute power and cores do you want on this virtual machine i.e. 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. If you finally want to get rid of this instance we can do an instance state and then terminate the instance. I have a step function that kicks off a python script in EC2. /bin/bash). Notify me of follow-up comments by email. 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. Instance settings, Edit user data. Next, create a key pair to log into your instance. created. Most of the entries in the NAME column of the output from lsof +D /tmp do not begin with /tmp. But dont worry, If you want it in JSON, I will provideJSONtemplate as well. I have also faced the same issue on Ubuntu 16.04 hvm AMI. in the AWS Knowledge Center. That means all you need is the parameter UserData of AWS::EC2::Instance resource type. The following is an example text file with a shell script. the Advanced details section of the launch instance Allow enough time for the instance to launch and run the directives in Work with instance user data - Amazon Elastic Compute Cloud So our web server is saying hello world from an IP address here, which is not the public IP. Step 4. Find centralized, trusted content and collaborate around the technologies you use most. Step 10. After I cleared that directory, User Data script worked normally. User-Data used in this post. What data is stored in Ephemeral Storage of Amazon EC2 instance? In this article, we are going to pass below code. vegan) just to try it, does this inconvenience the caterers and staff? You can read more about all that in the cloud-init Boot Stages docs section. rev2023.3.3.43278. To view, see. User data formats - cloud-init 22.4.2 documentation information, see Auto-assign Public IP in the Network settings On certain instances, you may see symlinks with the instance id at the above script location. 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. For more information, see Using instance profiles in the IAM User Guide. Configure a Windows instance using the EC2Config service If you preorder a special airline meal (e.g. Step 2. I prefer YAML for writing my templates. 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. By default, EC2 User Data scripts are executed as the root user when an EC2 instance is launched. 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. 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. It will execute the script on the first launch of our EC2 instance and only on the first launch. So the EC2 User Data has a very specific purpose. your user data, and then check to see that your directives have completed Its composed of many things at a high level. Stop your instance. #cloud-config line at the top is required in order to An instance profile provides the How to Set Up Apache Web Server in AWS EC2 Linux (Ubuntu) Instance? The best answers are voted up and rise to the top, Not the answer you're looking for? There are cases where I'd like to delete this state file so that the user data script will run again. amazon ec2 - user data scripts not working for me during starting of Well, there is a small catch, which if not known can be a time waster for you. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide. And in programming, when you do something for the first time, you usually say hello world. I would be more than happy to reply to your comment. Often times that actions that an. Is it possible to rotate a window 90 degrees if it has the same length and width? and open /var/log/cloud-init-output.log. the instance is already stopped or its root device is an instance store EC2 - Instance user data fail - [WARNING]: Failed to run module scripts-user. scripts and cloud-init directives. Especially if you are managing large scale enterprise accounts that have 100's of EC2 instances. information about the configuration tasks that the cloud-init package performs for file:// prefix to specify the file. The Amazon EC2 console can perform the base64-encoding for you or accept base64-encoded input. Find centralized, trusted content and collaborate around the technologies you use most. Scripts entered as user data are run as the root user, so do not use the Warning: Before starting this procedure, review the following: 1. It is to automate boot tasks such as. Do I need a thermal expansion tank if I already have a pressure tank? Feel free to add a comment in case you need me to cover using CLI as well. At least that's how it is in Linux, I guess on Windows it would be similar. I checked the system logs and saw my echoed string. 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. Just echo to stdout e.g. As I tested, there were some bootstrap data in /var/lib/cloud directory. Navigate to EC2 instance, grab the instance public IP from instance details screen and hit the pubic IP. Hi, First, replace the line UserData=user_data with user_data=user_data. Enter your cloud-init directive text in the User For more information about information, see Create a security group. For more If you preorder a special airline meal (e.g. The cloud-init user directives can be passed to an instance at launch the same way that a before you test that your user data directives have completed. Which means user-data / cloud-init script won't do what you want anyway. How do I connect these two faces together? EC2 User Data Script: It is a bootstrap script to configure the instance at the first launch. @c24w Those timestamps are misleading. I am trying to automate EC2 instance creation. Thanks for letting us know this page needs work. 6. way to send instructions to an instance at launch. distributions. Run user data after the initial launch of your EC2 instance 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. User data runs as root anyway. script is passed, although the syntax is different. How are we doing? Run EC2 user-data script as non-root user - Server Fault When launching an EC2 Windows instance, you can pass user data to the instance that can be used to perform automated configuration tasks. exit 0. But I have came up with different solution for it. If the instance is It only takes a minute to sign up. Additionally, you will also needscloudformation:*as well to be able to do CloudFormation stack creation, updation etc. 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. Follow Up: struct sockaddr storage initialization by network format-string. I want to get an output (success or failure) back from EC2 and based on the result start an appropriate step function. {AWSTemplateFormatVersion: 2010-09-09,Description: Template to Create an EC2 instance in a VPC,Parameters: {VpcId: {Type: String,Description: VPC id,Default: vpc-58c9a833},ImageId: {Type: String,Description: windows machine,Default: ami-0c4a11a8d0e503812},InstanceType: {Type: String,Description: Choosing t2 micro because it is free,Default: t2.micro},KeyName: {Description: SSH Keypair to login to the instance,Type: AWS::EC2::KeyPair::KeyName}},Resources: {DemoInstance: {Type: AWS::EC2::Instance,Properties: {ImageId: {Ref: ImageId},InstanceType: {Ref: InstanceType},KeyName: {Ref: KeyName},SecurityGroupIds: [{Ref: DemoSecurityGroup}],UserData: {Fn::Base64: {Fn::Sub: if ( Get-Service AWSXRayDaemon -ErrorAction SilentlyContinue ) {sc.exe stop AWSXRayDaemonsc.exe delete AWSXRayDaemon}, $targetLocation = C:\Program Files\Amazon\XRayif ((Test-Path $targetLocation) -eq 0) {mkdir $targetLocation}, $zipFileName = aws-xray-daemon-windows-service-3.x.zip$zipPath = $targetLocation\$zipFileName$destPath = $targetLocation\aws-xray-daemonif ((Test-Path $destPath) -eq 1) {Remove-Item -Recurse -Force $destPath}, $daemonPath = $destPath\xray.exe$daemonLogPath = $targetLocation\xray-daemon.log$url = https://s3.dualstack.us-west-2.amazonaws.com/aws-xray-assets.us-west-2/xray-daemon/aws-xray-daemon-windows-service-3.x.zip, Invoke-WebRequest -Uri $url -OutFile $zipPathAdd-Type -Assembly System.IO.Compression.Filesystem[io.compression.zipfile]::ExtractToDirectory($zipPath, $destPath), New-Service -Name AWSXRayDaemon -StartupType Automatic -BinaryPathName `$daemonPath` -f `$daemonLogPath`sc.exe start AWSXRayDaemon}}}},DemoSecurityGroup: {Type: AWS::EC2::SecurityGroup,Properties: {VpcId: {Ref: VpcId},GroupDescription: SG to allow SSH access via port 22,SecurityGroupIngress: [{IpProtocol: tcp,FromPort: 22,ToPort: 22,CidrIp: 0.0.0.0/0},{IpProtocol: tcp,FromPort: 80,ToPort: 80,CidrIp: 0.0.0.0/0},{IpProtocol: tcp,FromPort: 443,ToPort: 443,CidrIp: 0.0.0.0/0}],Tags: [{Key: Name,Value: EC2-SG}]}}},Outputs: {DemoInstanceId: {Description: Instance Id,Value: {Ref: DemoInstance}}}}. By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. rm /var/lib/cloud/instance/sem/config_scripts_user. Amazon Elastic Compute Cloud - Wikipedia Change parameters like ImageId, InstanceType and KeyName with your own AMI Id, instance type and name of keypair respectivey. By default, user data scripts and cloud-init directives run only during the boot cycle when you first launch an instance. Note that this includes a password passed in thru both the user data and powershell command line and is a bad security practice because they can be viewed later. 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. So lets go ahead and see the step by step instruction to execute EC2 user data script using CloudFormation. With describe-instance-attribute, the AWS CLI does not perform base64 decoding of the user data for you. A-143, 9th Floor, Sovereign Corporate Tower, We use cookies to ensure you have the best browsing experience on our website. this is the answer as an example: ensure that you have in the headline only #!/bin/bash. Log your EC2 Linux user data and then ship it to the console logs Run commands on your Linux instance at launch User data is treated as opaque data: what you give is what you get back. Bootstrap script to configure the instance at first launch, which is called the EC2 User Data. Did any DOS compatibility layers exist for any UNIX-like systems before DOS started to become outmoded? On a Linux computer , use the --query option to get the encoded user data and the /var/lib/cloud/instances/instance-id/ On services, tab search for EC2 and click on instances in the sidebar for creating an EC2 Instance. To learn more, see our tips on writing great answers. Steps to Execute EC2 User Data Script using CloudFormation I hope we are clear on the script by now. of cloud-init directives that run when the instance launches. A place where magic is studied and practiced? The User data field is Find centralized, trusted content and collaborate around the technologies you use most. There is a public IPv4 address, this is what were going to use to access our EC2 instance. 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). How can I utilize user data to automatically run a script with every restart of my Amazon EC2 Linux instance? In this case, it will be an EC2 instance store ). For more AWS EC2 userdata on Windows - Cloud for the win! How to get an AWS EC2 instance ID from within that EC2 instance? It is a bootstrap script to configure the instance at the first launch. 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? If these things still ain't working, you can test it further by forcing user-data to run manually. This means I also need to declare my template file like so: But I was still getting an error in the cloud init logs Note that the encoded output is stored in a file and the decoded output The permissions you EC2 User Data scripts will not run any commands as non-root user Before taking AMI remove /var/lib/cloud directory (each time).