I am trying to get an Ubuntu Cloud Image (specifically ami-311a1a5b) to bootstrap docker after being launched by terraform. I have the following configuration for doing this:
resource "aws_instance" "app" {
count = 1
ami = "${lookup(var.amis, var.region)}"
instance_type = "t2.micro"
subnet_id = "${aws_subnet.private.id}"
vpc_security_group_ids = ["${aws_security_group.default.id}"]
key_name = "${aws_key_pair.deployer.id}"
source_dest_check = false
# user_data = ${file("cloud-config/app.yml")}
user_data = "${template_file.cloud_config.rendered}"
depends_on = ["aws_instance.nat"]
tags = {
Name = "airpair-example-app-${count.index}"
}
root_block_device {
volume_type = "standard"
volume_size = 20
}
}
After the instance has started, docker is not installed and it seems that the cloud configuration has not been applied. The cloud configuration looks like:
# Cloud config for app servers
runcmd:
# Install docker
- curl -sSL https://get.docker.com | sudo sh
# Run nginx
- docker run -d -p 80:80 nginx
If I query the user-data it appears to be there:
services/ubuntu@ip-10-128-1-213:~$ curl http://169.254.169.254/latest/user-data
# Cloud config for app servers
runcmd:
# Install docker
- curl -sSL https://get.docker.com | sudo sh
# Run nginx
- docker run -d -p 80:80 nginx
My understanding is that it should be executed, is there a reason it isn't?
If you cloud config file there is exactly that, then you just need to edit the first line to read
#cloud-config
Otherwise cloud-init won't parse it as a cloud config file. It does look like terraform is correctly setting the user-data for you. The rest of the docs for cloud-init are at https://cloudinit.readthedocs.io/en/latest/, just be aware that the version on your AMI might be different from the docs so some features might not be available.