We are DigitalOcean circa 2015 mature. Good enough for some very large customers, good enough for many developers, not some place I'd run pacemaker infrastructure.
I did run some VRRP or CARP stuff (forget the specific tool/protocol - but that's kinda like pacemaker right?) in an immature OpenStack cloud once that didn't have a good LBaaS yet. It was a semi supported hack documented by the provider.