in updater/aws.go [498:503]
func (u *updater) waitUntilOk(ec2ID string) error {
log.Printf("Waiting for instance %q to reach Ok status", ec2ID)
return u.ec2.WaitUntilInstanceStatusOk(&ec2.DescribeInstanceStatusInput{
InstanceIds: []*string{aws.String(ec2ID)},
})
}