I don't know how big PagerDuty is; IIRC over 200 employees, so, a decent size.
I was giving a bare-minimum example of how this or (some other backup solution) should have already been setup and ready to be switched over.
DNS is bog-simple to serve and secure (provided you don't try to do the fancier stuff and just serve DNS records): it is basically like serving static HTML in terms of difficulty.
That a company would have a backup of all important sites/IP addresses locally available and ready to deploy on some other service, or even be built by hand via some quickly rented servers, is I think quite a reasonable thing to have. I guess it would also be simple to run on GCE and Azure as well, if you don't like the idea of dedicated servers.
I was giving a bare-minimum example of how this or (some other backup solution) should have already been setup and ready to be switched over.
DNS is bog-simple to serve and secure (provided you don't try to do the fancier stuff and just serve DNS records): it is basically like serving static HTML in terms of difficulty.
That a company would have a backup of all important sites/IP addresses locally available and ready to deploy on some other service, or even be built by hand via some quickly rented servers, is I think quite a reasonable thing to have. I guess it would also be simple to run on GCE and Azure as well, if you don't like the idea of dedicated servers.