[nderjung]

Volumes are persistent, block devices which you mount to a path and are initialized and de-initialized by the kernel which we boot up and shut down, respectively, based on autoscale/scale-to-zero configuration. This means that if your application uses said volume it will be able to access it during its online-lifetime. That said, because they are persistent, it means that they are not as ephemeral (or "scale-to-zero") as the instance itself on KraftCloud.

Because KraftCloud leverages Unikraft, a unikernel library OS project, we are single-process. Postgres is multi-process since it uses the fork() syscall. If you require Postgres, we can set it up for you as a managed service. That said also, we are currently working on supporting fork() and this should become available in the next few weeks/end of April.

Re: bring your own DB: yes. We are setting up metros in many popular hyperscalers and IaaS vendors and DC zones. This means there should be no egress fees and you'll have data locality.

For serious deployments, be close to your data. If you get in contact ([e-mail]), we can discuss further how we are approaching this.

And yes, we are working on cron, this will translate to setting up an instance to start at a regular interval and not auto-restart it (so it scales-to-zero). :-)