Using etcd for Distributed Locking
Understand how to implement distributed locking using etcd in Python. This lesson covers the Raft consensus algorithm, lock acquisition with transactions, handling lock release and time-to-live, and practical examples using the etcd3 Python package and Cotyledon library to coordinate distributed processes safely.
We'll cover the following...
Introduction to etcd
etcd is a popular distributed key/value store. It stores keys and values and replicates them on several nodes which can be used to query or update the keys. To keep its members in sync, etcd implements the Raft algorithm. Raft solves the consensus issue in distributed systems by electing a leader who is responsible for maintaining consistency across nodes. In short, Raft makes sure that data stored by etcd are consistent across all nodes, and that if a node crashes, the etcd cluster can continue to operate until its failed node comes back to life.
In that regard, etcd allows implementing a distributed lock. The basic idea behind the lock algorithm is to write some value in a ...