Firstly, why do you need your users to write and run arbitary code on your servers? If your product is such that user access is needed, then publishing an API for access would appear to be a simpler approach.
Nevertheless, if you do need to do so, why not look into using FreeBSD with jails, etc? Alternatively you could spin-up a hosted VM on their behalf and have them use that. But anybody who can program could probably do that for themselves, thus my API suggestion as above.
Nevertheless, if you do need to do so, why not look into using FreeBSD with jails, etc? Alternatively you could spin-up a hosted VM on their behalf and have them use that. But anybody who can program could probably do that for themselves, thus my API suggestion as above.