How To Install corosync-qnetd on Ubuntu 18.04
Introduction
In this tutorial we learn how to install corosync-qnetd on Ubuntu 18.04.
What is corosync-qnetd
corosync-qnetd is:
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.
There are three methods to install corosync-qnetd on Ubuntu 18.04. We can use apt-get, apt and aptitude. In the following sections we will describe each method. You can choose one of them.
Install corosync-qnetd Using apt-get
Update apt database with apt-get using the following command.
sudo apt-get update
After updating apt database, We can install corosync-qnetd using apt-get by running the following command:
sudo apt-get -y install corosync-qnetd
Install corosync-qnetd Using apt
Update apt database with apt using the following command.
sudo apt update
After updating apt database, We can install corosync-qnetd using apt by running the following command:
sudo apt -y install corosync-qnetd
Install corosync-qnetd Using aptitude
If you want to follow this method, you might need to install aptitude first since aptitude is usually not installed by default on Ubuntu. Update apt database with aptitude using the following command.
sudo aptitude update
After updating apt database, We can install corosync-qnetd using aptitude by running the following command:
sudo aptitude -y install corosync-qnetd
How To Uninstall corosync-qnetd on Ubuntu 18.04
To uninstall only the corosync-qnetd package we can use the following command:
sudo apt-get remove corosync-qnetd
Uninstall corosync-qnetd And Its Dependencies
To uninstall corosync-qnetd and its dependencies that are no longer needed by Ubuntu 18.04, we can use the command below:
sudo apt-get -y autoremove corosync-qnetd
Remove corosync-qnetd Configurations and Data
To remove corosync-qnetd configuration and data from Ubuntu 18.04 we can use the following command:
sudo apt-get -y purge corosync-qnetd
Remove corosync-qnetd configuration, data, and all of its dependencies
We can use the following command to remove corosync-qnetd configurations, data and all of its dependencies, we can use the following command:
sudo apt-get -y autoremove --purge corosync-qnetd
References
Summary
In this tutorial we learn how to install corosync-qnetd package on Ubuntu 18.04 using different package management tools: apt, apt-get and aptitude.
