It looks like a dependency of lxd, the successor to lxc, which is being developed by Canonical (of Ubuntu fame). You can see how they're using it in https://git

It looks like a dependency of lxd, the successor to lxc, which is being developed by Canonical (of Ubuntu fame). You can see how they're using it in https://github.com/lxc/lxd/tree/master/lxd/cluster https://github.com/lxc/lxd/tree/master/lxd/cluster. Dqlite and rqlite are not in the same space as postgres and mysql, they're more comparable to tools like Zookeeper, etcd, or Consul[0] - low throughput CP data stores that are generally used for coordinating distributed systems. In this case, it saves users from having to manage an external data store to run lxd clustered. [0] in fact, dqlite uses the same raft implementation as Consul, which is cool