How To Install watcher-applier on Ubuntu 18.04
Introduction
In this tutorial we learn how to install watcher-applier on Ubuntu 18.04.
What is watcher-applier
watcher-applier is:
OpenStack Watcher provides a flexible and scalable resource optimization service for multi-tenant OpenStack-based clouds. Watcher provides a complete optimization loop-including everything from a metrics receiver, complex event processor and profiler, optimization processor and an action plan applier. This provides a robust framework to realize a wide range of cloud optimization goals, including the reduction of data center operating costs, increased system performance via intelligent virtual machine migration, increased energy efficiency-and more!
This package contains the Watcher Applier.
There are three methods to install watcher-applier 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 watcher-applier Using apt-get
Update apt database with apt-get using the following command.
sudo apt-get update
After updating apt database, We can install watcher-applier using apt-get by running the following command:
sudo apt-get -y install watcher-applier
Install watcher-applier Using apt
Update apt database with apt using the following command.
sudo apt update
After updating apt database, We can install watcher-applier using apt by running the following command:
sudo apt -y install watcher-applier
Install watcher-applier 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 watcher-applier using aptitude by running the following command:
sudo aptitude -y install watcher-applier
How To Uninstall watcher-applier on Ubuntu 18.04
To uninstall only the watcher-applier package we can use the following command:
sudo apt-get remove watcher-applier
Uninstall watcher-applier And Its Dependencies
To uninstall watcher-applier and its dependencies that are no longer needed by Ubuntu 18.04, we can use the command below:
sudo apt-get -y autoremove watcher-applier
Remove watcher-applier Configurations and Data
To remove watcher-applier configuration and data from Ubuntu 18.04 we can use the following command:
sudo apt-get -y purge watcher-applier
Remove watcher-applier configuration, data, and all of its dependencies
We can use the following command to remove watcher-applier configurations, data and all of its dependencies, we can use the following command:
sudo apt-get -y autoremove --purge watcher-applier
References
Summary
In this tutorial we learn how to install watcher-applier package on Ubuntu 18.04 using different package management tools: apt, apt-get and aptitude.
