User-data scripts is not running on my custom AMI, but working in standard Amazon linux

Question

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

Answer 1

I was having a lot of trouble with this. I'll provide detailed walk-though.

My added wrinkle is that I'm using terraform to instantiate the hosts via a launch configuration and autoscaling group.

I could NOT get it to work by adding the script inline in lc.tf

user_data                   = DATA <<
"
#cloud-boothook
#!/bin/bash
echo 'some crap'\'
"
DATA

I could fetch it from user data,

wget http://169.254.169.254/latest/user-data

but noticed I was getting it with the quotes still in it.

This is how I got it to work: I moved to pulling it from a template instead since what you see is what you get.

user_data                   = "${data.template_file.bootscript.rendered}"

This means I also need to declare my template file like so:

data "template_file" "bootscript" {
  template = "${file("bootscript.tpl")}"

}

But I was still getting an error in the cloud init logs /var/log/cloud-init.log [WARNING]: Unhandled non-multipart (text/x-not-multipart) userdata: 'Content-Type: text/cloud...'

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.

So my bootscript.tpl looks like this:

Content-Type: multipart/mixed; boundary="//"
MIME-Version: 1.0

--//
Content-Type: text/cloud-config; charset="us-ascii"
MIME-Version: 1.0
Content-Transfer-Encoding: 7bit
Content-Disposition: attachment; filename="cloud-config.txt"

#cloud-config
cloud_final_modules:
- [scripts-user, always]

--//
Content-Type: text/x-shellscript; charset="us-ascii"
MIME-Version: 1.0
Content-Transfer-Encoding: 7bit
Content-Disposition: attachment; filename="userdata.txt"

#!/bin/bash
echo "some crap"
--//