> Ceph is seriously badass, but my requirements are to create a cluster in > which I can host my customer's data in separate areas which are independently > encrypted, with passphrases which we as cloud admins do not have access to. > > My current thoughts are: > 1. Create an OSD per machine stretching over all installed disks, then create > a user-sized block device per customer. Mount this block device on an access > VM and create a LUKS container in to it followed by a zpool and then I can > allow the users to create separate bins of data as separate ZFS filesystems > in the container which is actually a blockdevice striped across the OSDs. > 2. Create an OSD per customer and use dm-crypt, then store the dm-crypt key > somewhere which is rendered in some way so that we cannot access it, such as > a pgp-encrypted file using a passphrase which only the customer knows.
> My questions are: > 1. What are people's comments regarding this problem (irrespective of my > thoughts) What is the threat model that leads to these requirements? The story "cloud admins do not have access" is not achievable through technology alone. > 2. Which would be the most efficient of (1) and (2) above? In the case of #1 and #2, you are only protecting data at rest. With #2 you would need to decrypt the key to open the block device, and the key would remain in memory until it is unmounted (which the cloud admin could access). This means #2 is safe so long as you never mount the volume, which means it's utility is rather limited (archive perhaps). Neither of these schemes buy you much more than the encryption handling provided by ceph-disk-prepare (dmcrypted osd data/journal volumes), the key management problem becomes more acute, eg. per tenant. -- Kyle _______________________________________________ ceph-users mailing list ceph-users@lists.ceph.com http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
