How To Install varnish-redis on Ubuntu
Posted on April 1, 2023 (Last modified on May 20, 2023 )
3 minutes • 505 words
Introduction
In this tutorial we learn how to install varnish-redis on Ubuntu.
What is varnish-redis
varnish-redis is:
VMOD using the synchronous hiredis library API to access Redis servers from VCL.
Highlights:
- Full support for execution of Lua scripts (i.e. EVAL command), including optimistic automatic execution of EVALSHA commands.
- All Redis reply data types are supported, including partial support to access to components of simple (i.e. not nested) array replies.
- Redis pipelines are not (and won’t be) supported. Lua scripting, which is fully supported by the VMOD, it’s a much more flexible alternative to pipelines for atomic execution and minimizing latency. Pipelines are hard to use and error prone, specially when using the WATCH command.
- Support for classic Redis deployments using multiple replicated Redis servers and for clustered deployments based on Redis Cluster.
- Support for multiple databases and multiple Redis connections, local to each Varnish worker thread, or shared using one or more pools.
- Support for smart command execution, selecting the destination server according with the preferred role (i.e. master or slave) and with distance and healthiness metrics collected during execution.
- Support for Redis Sentinel, allowing automatic discovery of sick / healthy servers and changes in their roles.
There are three methods to install varnish-redis on Ubuntu. We can use apt-get, apt and aptitude. In the following sections we will describe each method. You can choose one of them.
Install varnish-redis Using apt-get
Update apt database with apt-get using the following command.
sudo apt-get update
After updating apt database, We can install varnish-redis using apt-get by running the following command:
sudo apt-get -y install varnish-redis
Install varnish-redis Using apt
Update apt database with apt using the following command.
sudo apt update
After updating apt database, We can install varnish-redis using apt by running the following command:
sudo apt -y install varnish-redis
Install varnish-redis 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 varnish-redis using aptitude by running the following command:
sudo aptitude -y install varnish-redis
How To Uninstall varnish-redis on Ubuntu
To uninstall only the varnish-redis package we can use the following command:
sudo apt-get remove varnish-redis
Uninstall varnish-redis And Its Dependencies
To uninstall varnish-redis and its dependencies that are no longer needed by Ubuntu, we can use the command below:
sudo apt-get -y autoremove varnish-redis
Remove varnish-redis Configurations and Data
To remove varnish-redis configuration and data from Ubuntu we can use the following command:
sudo apt-get -y purge varnish-redis
Remove varnish-redis configuration, data, and all of its dependencies
We can use the following command to remove varnish-redis configurations, data and all of its dependencies, we can use the following command:
sudo apt-get -y autoremove --purge varnish-redis
Dependencies
varnish-redis have the following dependencies:
References
Summary
In this tutorial we learn how to install varnish-redis package on Ubuntu using different package management tools: apt, apt-get and aptitude.