Using Signal when updating an AutoScalingGroup

[Cloudrage]

In AutoScalingGroup properties, we have 3 ways to update an ASG :
NONE
REPLACING_UPDATE
ROLLING_UPDATE

https://docs.aws.amazon.com/cdk/api/latest/docs/@aws-cdk_aws-autoscaling.AutoScalingGroup.html

In the 2 last update types, we need to wait for a CfnSignal, even if waitOnResourceSignals is set to : false and without minSuccessfulInstancesPercent prop, for ROLLING_UPDATE type.

I've started to try with the command in my UserData file :
cfn-signal --region ${Region} --resource ${Resource} --stack ${StackName}

And Sub on my TypeScript snippet :

cdk.Fn.base64(cdk.Fn.sub(fs.readFileSync('data/userdata/userdata.sh','utf8'), {
[...]
'Region': AppAccountRegion, 'Resource': 'AutoScalingGroup', 'StackName': stackName
}));

But I have issue on using my UserData from a file (#8161 (comment)).

• Maybe you can add examples to use Signal ?

• Or provide a way to 'cfn-signal like eladb mention there :
  ec2: cfn-init support in ASGs #1413 (comment)

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This is a 📕 documentation issue

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