Keystone provides authentication, authorization and service discovery
mechanisms via HTTP primarily for use by projects in the OpenStack
family. It is most commonly deployed as an HTTP interface to existing
identity systems, such as LDAP.
Snaps are applications packaged with all their dependencies to run on all popular Linux distributions from a single build. They update automatically and roll back gracefully.
Snaps are discoverable and installable from the Snap Store, an app store with an audience of millions.