This project provides a distributed supervisor for neard that implements failover for NEAR validators. NEAR is an application platform built on top of the NEAR protocol blockchain. Validator nodes, run by the community, provide computational resources to the NEAR network and collect monetary rewards at regular intervals, based on the volume of work (blocks and chunks produced). Validators who do not complete the work assigned to them receive fewer rewards and may be excluded from the group of validators who are allowed to validate for some time.
kuutamod allows multiple NEAR validators to operate in an active-passive setup.
One validator becomes the active validator node, and is started with the validator keys, while the other nodes stay synchronised with the blockchain ready to take over if needed.
In the event of a failure, i.e. a neard crash, network split or hardware failure of the active validator node, a passive instance will get be promoted to an active validator. This is accomplished by kuutamod automatically restarting a passive node with validator keys. Future work is planned to be able to switch active/passive mode at runtime.
To avoid having two active validators running at the same time, kuutamod uses consul by acquiring a distributed lock.
kuutamod is continuously tested and also used in production for validators.
However kuutamod's interface is still under active development and might
change significantly.
- Tutorials:
- References:
- Architecture