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How to copy a file to aws ec2 instance and use it in the user-data?

Uday Kiran Reddy

9/18/23, 10:20 AM

I have an rpm file for an application which is generated daily that I want to install on an EC2 server using user-data of ec2-instance using terraform.

I got file provisioner in a search result, but found that it will do the step after user-data.

Any suggestions how to do that?

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amazon-web-services

terraform

Tim

9/18/23, 6:11 PM

sFtp the file to the instance using your ssh key, or put it on a web server and use wget to download it.

Uday Kiran Reddy

9/19/23, 7:23 AM

no it should be done before user-data. And creating a separate webserver for this file is not feasible

Tim

9/19/23, 8:50 AM

Read the first part of my comment again. Your post is a little ambiguous, if you need help please be precise.

Uday Kiran Reddy

9/19/23, 12:42 PM

I didn't understand what is ambiguous in this. I mentioned clearly it is user-data of aws ec2 instance. For more information on user-data follow this link https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/user-data.html

Uday Kiran Reddy

9/19/23, 12:43 PM

And, sFtp also works after user-data only.

Tim

9/19/23, 6:06 PM

Oh, I think I understand now. Every time an instance starts you want to install something in an RPM file. A better way to ask a question is to say what you're trying to achieve, rather than asking how to achieve the steps you think you need.

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Tim

9/19/23, 6:11 PM

Option One - Make File Available

Given the information you've given in the comments I think your best or perhaps your only option is to make the RPM file available on a web server somewhere the user-data script can access it. If this is a private rpm I would put it on S3 with the bucket configured as a web server, use an S3 endpoint in the VPC, and ensure the S3 bucket only accepts requests from that endpoint.

Option Two - Create an AMI

Instead of installing the RPM in the user-data script every time the instance starts, have you considered making a golden image? That way the RPM is installed once manually, then every instance created has the RPM installed. The other advantage is the instance starts faster.

The general steps to do this are:

Create an instance
Install the RPM manually
Stop the instance
Create an image / AMI

You then use the custom AMI to start new instances.

Even if this doesn't solve your problem, it may help others with a similar problem in future.

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Uday Kiran Reddy

9/20/23, 5:17 AM

this rpm generates on daily basis, so creating an image is not feasible right

Tim

9/20/23, 9:44 AM

That's unusual. I think you may need to put it onto a web server - e.g. S3 to bootstrap it. You might be able to use AWS Image Builder to build a new server image each day.

Uday Kiran Reddy

9/20/23, 11:43 AM

why creating a new ami is a solution to install just an rpm. And it is not unusual as that rpm is generated by us on daily basis whenever new change in our code. Please suggest if you have any other option

Tim

9/20/23, 8:43 PM

I've given you another option in the file. You'll find you get better answers faster if you give people all the information up front. I've edited your question a bit to add information you've provided in comments.

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EN: How to copy a file to aws ec2 instance and use it in the user-data?

TH: จะคัดลอกไฟล์ไปยังอินสแตนซ์ aws ec2 และใช้ในข้อมูลผู้ใช้ได้อย่างไร

RO: Cum să copiați un fișier în instanța aws ec2 și să îl utilizați în datele utilizatorului?

RU: Как скопировать файл в экземпляр aws ec2 и использовать его в пользовательских данных?

VI: Làm cách nào để sao chép tệp vào phiên bản aws ec2 và sử dụng tệp đó trong dữ liệu người dùng?

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