VPS / Jail / Bhyve File System isolation

[Julian Elischer]

On 11/20/13, 10:03 AM, Miroslav Lachman wrote:
> Bruno Lauzé wrote:
>>
>> Using jails, customers are uncomfortable with the fact documents 
>> can be accessed from the host with root access.Project VPS seems to 
>> isolate more the guest from the host but not as well as an 
>> hypervisor like bhyve. With an hypervisor what the client have is 
>> private, as long as the host can manage the disk, delete it, but 
>> the information is kept private from the host.
>> Any suggestions how to offer jail, vps, or anything containers 
>> techniques with total file system isolation from the host, or the 
>> only way is to go hypervisor, with the performance and instances 
>> count penalty that goes with it?
>
> There is the same problem with all hypervisors. Nothing prevents 
> hypervisor admin to do a snapshot image and mount it as another disk 
> to other OS and access the data.
> So nothing is private at this virtualisation level. (without 
> encrypted disks)
and even then that is not true because root of the host system can 
recover the disk contents if he knows where to get the key from. 
(terminal snooping etc.)

> Miroslav Lachman
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