Drop the vendor zone requirement

[mnordhoff]

@davehart

I’m glad Amazon is making an effort to push more of their AWS clients to their much better time service in the same data centers as the VMs, as my US-based pool servers see most traffic from AWS clients, likely most using bespoke .iso images, not those provided by Amazon.

I mentioned that recently and someone said it’s actually only used on Windows and Amazon Linux by default so far.

Some client really can't behave

According to the EC2 documentation, the internal NTP is preconfigured on Amazon Linux 2, Amazon Linux AMI and Amazon Windows AMI. For the other distros (and all old instances) it is up to the server operator to set up time sync or it will use distro defaults. So the rollout is still far from finished. And even if you follow the official manual, that just ensures that you add the local ntp service to the config, next to the other servers…

@davehart

Even better would be to see Amazon start providing pool servers in each DC.

That would be neat! They run time.aws.com (with leap smearing, and IP addresses that have changed a few times) in some regions but it’s not in the Pool (I assume).