I use Kubernetes for almost everything (including my pet projects) and I see the value it brings, even if for increased complexity (although k3s is a pretty good middle ground). But none of these things you mentioned are unsolvable or require manual intervention.
> What if a server gets rebooted
Then the rsync/scp would fail and I would notice it in deployment logs. Or it should be straightforward to monitor current version across a fleet of baremetal.
> Maybe you lost internet while doing the update
True, but even Ansible recommends running a controller closer to target machines.
> What about a broken build
That's what tests are for.
> maybe migration problem
That's trickier, but unrelated to deployment method.
> How do you revert (push an older tarball)
By... pushing an older tarball?
> What if a server gets rebooted
Then the rsync/scp would fail and I would notice it in deployment logs. Or it should be straightforward to monitor current version across a fleet of baremetal.
> Maybe you lost internet while doing the update
True, but even Ansible recommends running a controller closer to target machines.
> What about a broken build
That's what tests are for.
> maybe migration problem
That's trickier, but unrelated to deployment method.
> How do you revert (push an older tarball)
By... pushing an older tarball?