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Discussion on: Amazon Route 53: How to automatically update IP addresses without using Elastic IPs

nonbeing profile image
Ambar • Edited

Great article.

I just tried it out, and there was just one little detail that I was banging my head against for the last hour: the shell script needs to start with a shebang like: #!/bin/bash.

Until, I made this change to the script, it was not executing properly on each boot, and I was constantly running into this error in /var/log/cloud-init.log :

2020-02-17 06:57:29,292 -[WARNING]: Failed running /var/lib/cloud/scripts/per-boot/

I got the hint that the shebang line was needed from this:

cloudinit.util.ProcessExecutionError: Exec format error. Missing #! in script?

that I found over here. Your script is working great now!

I'd also like to point out that you might want to change this line:
"Resource": "arn:aws:route53:::hostedzone/Z3NAOAAAA11BB22"
to something like "Resource": "arn:aws:route53:::hostedzone/<YOUR_ROUTE53_ZONE_ID_here>". Just in case someone is not alert enough to modify the literal ZoneId in their IAM policy, when copy+pasting from the article :)

Overall, super-useful post. Thank you!

aws_john profile image
John Rotenstein Author

Oops! Sorry for causing you that problem. I've now updated the post.

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