Install corosync-qnetd by entering the following commands in the terminal:
sudo apt update sudo apt install corosync-qnetd
cluster engine quorum device network daemon
The Corosync Cluster Engine is a Group Communication System with additional features for implementing high availability within applications. The project provides four C Application Programming Interface features: . * A closed process group communication model with virtual synchrony guarantees for creating replicated state machines. * A simple availability manager that restarts the application process when it has failed. * A configuration and statistics in-memory database that provide the ability to set, retrieve, and receive change notifications of information. * A quorum system that notifies applications when quorum is achieved or lost. . This package contains the quorum device network daemon running outside of clusters with the purpose of providing votes to the corosync-qdevice model "net", and some utilities for it.