Consul has an entire locking system that’s based on Chubby in the KV system. I’ve used it at pretty big scales and it seems fine.

If you want actual OSS you can use an older release, the KV system guts haven’t changed much in awhile iirc.

etcd is fairly similar to Chubby indeed, or Zookeeper.

ZooKeeper or ClickHouse Keeper, Etcd, Consul.