wget can't access aws metadata

[Trandel]

Hi,

I'm using your image for some automation and it worked great for a year or more but the new version of the image stopped working.

I was using the latest tag:
mesosphere/aws-cli latest f699e09bef16 10 months ago 97.8MB

and running this command inside:

aws ec2 associate-address --instance-id `wget -qO- http://169.254.169.254/latest/meta-data/instance-id` --allocation-id #ID# --allow-reassociation

Everything was fine but now with the new version I'm getting:
wget: error getting response

The same is for 1.11.188.

The problem seems to be this part: wget -qO- http://169.254.169.254/latest/meta-data/instance-id.

To replicate it you need to run it on AWS ec2 so it will have access to AWS meta-data url.

I've copied your working version to my docker hub account just to have a working image:
https://hub.docker.com/r/trandel/aws-cli/

I hope you will have some time to look at it.

Regards

[Trandel]

Hi again,
It looks like I jumped to conclusions too fast. It's not the image version. I couldn't get it to work with the old one as well.

I'm using this image for EC2 instance: https://docs.aws.amazon.com/AmazonECS/latest/developerguide/ecs-optimized_AMI_launch_latest.html
amzn-ami-2018.03.i-amazon-ecs-optimized

Docker version: 18.06.1-ce

It looks like the issue is with alpine:3.6 which your image is based on.
I tried:

docker run --rm alpine:3.6 wget -qO- http://169.254.169.254/latest/meta-data/instance-id
and got wget: error getting response

docker run --rm alpine:3.7 wget -qO- http://169.254.169.254/latest/meta-data/instance-id
works as expected

docker run --rm alpine:3.8 wget -qO- http://169.254.169.254/latest/meta-data/instance-id
works as expected

I created a new image based on 3.8 trandel/aws-cli:alpine3.8 it fixed the issue for me.

You might want to update yours as well if you want it to work with newest EC2 images for ECS.

Regards