I’m not sure this is actually possible via SDK https://docs.aws.amazon.com/autoscaling/ec2/userguide/autoscaling-tagging.html

Potentially I could create the instances and attachment them to a Group, but then I’m bypassing the template, also Pulumi doesn’t support this type of attachment. https://boto3.amazonaws.com/v1/documentation/api/latest/reference/services/autoscaling.html#AutoScaling.Client.attach_instances https://www.pulumi.com/docs/reference/pkg/aws/autoscaling/attachment/

Ok, so I got this working. In the example below, you can see that I've tagged the EC2 instance with a tag called

appName

(although you can tag them whatever you want) Then I'm getting the instances using

aws.ec2.getInstances()

(worth noting that the instance data that's returned is not the same as on the

aws.ec2.Instance

resource)

const myAppName = "pk-app";

let instances = pulumi.output(aws.ec2.getInstances({
    instanceTags: {
        appName: myAppName
    }
}));

instances.ids.apply(ids => {
    ids.map(id => {
        new aws.cloudwatch.LogGroup(`${appName}-ec2-lg`, {
            name: pulumi.interpolate`/custom/ec2/${myAppName}/${id}`,
            retentionInDays: 14
        })
    })
});