How to build high available/fault-tolerant services in node.js

During my job for an important client , I was thinking about high availability and recovery NFRs , our tech stack included cassandra and kafka , two distributed systems of which I studied internal behavior.
Kafka used Zookeeper to keep track of assigned partitions to each consumer , Cassandra had a gossip algorithm between nodes and divides data in partition ranges .
So I was starting to think if there was any library ( not an external service like zookeeper ) that had an algorithm with gossip implemented so that people could build some new distributed systems more easily.
That library does not exist , and then I created ring-election .

You can integrate ring-election into your node process and you will have some important NFRs already constructed !!!

What the ring-election driver offers you ?

• A default partitioner that for an object returns the partition to which it is assigned.
• Mechanism of leader election
• Failure detection between nodes.
• Assignment and rebalancing of partitions between nodes
• Automatic re-election of the leader
• Listen for new assigned/revoked partitions

What problems can you solve with this driver ?

• Scalability
• High availability
• Concurrency between nodes in a cluster
• Automatic failover

How it works under the hood

Terminology

• Leader , the node that will handle the cluster and will not have assigned partitions
• Follower , a node that will have assigned partitions and will work on them
• Heartbeat , a message sent periodically from the followers to leader node to keep track that is alive.
• Heartcheck , a process that run on the leader and go to check the last heartbeat received by each follower
• Priority , is assigned to each follower based on the time that they joined the cluster , when a node die the priority is decreased by one . If the leader die the node with lower priority will become the leader
• Node id , each follower node has an assigned id that is unique into the cluster

Start up phase described

Detect follower failures ( Heartbeat/Heartcheck )

Leader Failure

How to integrate it ?

Join https://github.com/pioardi/ring-election to have more info .
If you want to suggest new features or you want help to integrate ring-election open an issue on github and I will be happy to help you.