Autoscaling isn’t only used the grow the number of servers under load, but also to guarantee availability of a fixed number. If the max is set to 1, the bastion host is protected against hardware failure, zone outages, or just you screwing up.
Accidentally killed your bastion host? No problem, within a few minutes autoscaling will have provisioned a new one and you’re good to go again.
Why would you need autoscaling for the bastion server?
Autoscaling isn’t only used the grow the number of servers under load, but also to guarantee availability of a fixed number. If the max is set to 1, the bastion host is protected against hardware failure, zone outages, or just you screwing up. Accidentally killed your bastion host? No problem, within a few minutes autoscaling will have provisioned a new one and you’re good to go again.