How To Install haproxy on CentOS 8
haproxy is HAProxy reverse proxy for high availability environments
Introduction
In this tutorial we learn how to install haproxy on CentOS 8.
What is haproxy
HAProxy is a TCP/HTTP reverse proxy which is particularly suited for high availability environments. Indeed, it can - route HTTP requests depending on statically assigned cookies - spread load among several servers while assuring server persistence through the use of HTTP cookies - switch to backup servers in the event a main one fails - accept connections to special ports dedicated to service monitoring - stop accepting connections without breaking existing ones - add, modify, and delete HTTP headers in both directions - block requests matching particular patterns - report detailed status to authenticated users from a URI intercepted from the application
We can use yum or dnf to install haproxy on CentOS 8. In this tutorial we discuss both methods but you only need to choose one of method to install haproxy.
Install haproxy on CentOS 8 Using dnf
Update yum database with dnf using the following command.
sudo dnf makecache --refresh
The output should look something like this:
CentOS Linux 8 - AppStream 43 kB/s | 4.3 kB 00:00
CentOS Linux 8 - BaseOS 65 kB/s | 3.9 kB 00:00
CentOS Linux 8 - ContinuousRelease 43 kB/s | 3.0 kB 00:00
CentOS Linux 8 - Extras 23 kB/s | 1.5 kB 00:00
CentOS Linux 8 - FastTrack 40 kB/s | 3.0 kB 00:00
CentOS Linux 8 - HighAvailability 36 kB/s | 3.9 kB 00:00
CentOS Linux 8 - Plus 24 kB/s | 1.5 kB 00:00
CentOS Linux 8 - PowerTools 50 kB/s | 4.3 kB 00:00
Extra Packages for Enterprise Linux Modular 8 - x86_64 13 kB/s | 9.2 kB 00:00
Extra Packages for Enterprise Linux 8 - x86_64 24 kB/s | 8.5 kB 00:00
Metadata cache created.
After updating yum database, We can install haproxy using dnf by running the following command:
sudo dnf -y install haproxy
Install haproxy on CentOS 8 Using yum
Update yum database with yum using the following command.
sudo yum makecache --refresh
The output should look something like this:
CentOS Linux 8 - AppStream 43 kB/s | 4.3 kB 00:00
CentOS Linux 8 - BaseOS 65 kB/s | 3.9 kB 00:00
CentOS Linux 8 - ContinuousRelease 43 kB/s | 3.0 kB 00:00
CentOS Linux 8 - Extras 23 kB/s | 1.5 kB 00:00
CentOS Linux 8 - FastTrack 40 kB/s | 3.0 kB 00:00
CentOS Linux 8 - HighAvailability 36 kB/s | 3.9 kB 00:00
CentOS Linux 8 - Plus 24 kB/s | 1.5 kB 00:00
CentOS Linux 8 - PowerTools 50 kB/s | 4.3 kB 00:00
Extra Packages for Enterprise Linux Modular 8 - x86_64 13 kB/s | 9.2 kB 00:00
Extra Packages for Enterprise Linux 8 - x86_64 24 kB/s | 8.5 kB 00:00
Metadata cache created.
After updating yum database, We can install haproxy using yum by running the following command:
sudo yum -y install haproxy
How To Uninstall haproxy on CentOS 8
To uninstall only the haproxy package we can use the following command:
sudo dnf remove haproxy
haproxy Package Contents on CentOS 8
/etc/haproxy
/etc/haproxy/haproxy.cfg
/etc/logrotate.d/haproxy
/etc/sysconfig/haproxy
/usr/bin/halog
/usr/bin/iprange
/usr/lib/.build-id
/usr/lib/.build-id/05
/usr/lib/.build-id/05/3e8866280b6206e36255a46f0ea1bb79705784
/usr/lib/.build-id/a1
/usr/lib/.build-id/a1/0bb61846c6f940fb88d7d3c250bb10f525a102
/usr/lib/.build-id/ab
/usr/lib/.build-id/ab/964c67b286c6f72430c820b0a7d30f88cb6b49
/usr/lib/systemd/system/haproxy.service
/usr/sbin/haproxy
/usr/share/doc/haproxy
/usr/share/doc/haproxy/51Degrees-device-detection.txt
/usr/share/doc/haproxy/CHANGELOG
/usr/share/doc/haproxy/DeviceAtlas-device-detection.txt
/usr/share/doc/haproxy/README
/usr/share/doc/haproxy/ROADMAP
/usr/share/doc/haproxy/SPOE.txt
/usr/share/doc/haproxy/VERSION
/usr/share/doc/haproxy/WURFL-device-detection.txt
/usr/share/doc/haproxy/acl-content-sw.cfg
/usr/share/doc/haproxy/acl.fig
/usr/share/doc/haproxy/architecture.txt
/usr/share/doc/haproxy/auth.cfg
/usr/share/doc/haproxy/close-options.txt
/usr/share/doc/haproxy/coding-style.txt
/usr/share/doc/haproxy/configuration.txt
/usr/share/doc/haproxy/content-sw-sample.cfg
/usr/share/doc/haproxy/cookie-options.txt
/usr/share/doc/haproxy/design-thoughts
/usr/share/doc/haproxy/design-thoughts/backends-v0.txt
/usr/share/doc/haproxy/design-thoughts/backends.txt
/usr/share/doc/haproxy/design-thoughts/be-fe-changes.txt
/usr/share/doc/haproxy/design-thoughts/binding-possibilities.txt
/usr/share/doc/haproxy/design-thoughts/buffer-redesign.txt
/usr/share/doc/haproxy/design-thoughts/buffers.fig
/usr/share/doc/haproxy/design-thoughts/config-language.txt
/usr/share/doc/haproxy/design-thoughts/connection-reuse.txt
/usr/share/doc/haproxy/design-thoughts/connection-sharing.txt
/usr/share/doc/haproxy/design-thoughts/dynamic-buffers.txt
/usr/share/doc/haproxy/design-thoughts/entities-v2.txt
/usr/share/doc/haproxy/design-thoughts/how-it-works.txt
/usr/share/doc/haproxy/design-thoughts/http2.txt
/usr/share/doc/haproxy/design-thoughts/http_load_time.url
/usr/share/doc/haproxy/design-thoughts/rate-shaping.txt
/usr/share/doc/haproxy/design-thoughts/sess_par_sec.txt
/usr/share/doc/haproxy/gpl.txt
/usr/share/doc/haproxy/haproxy.1
/usr/share/doc/haproxy/internals
/usr/share/doc/haproxy/internals/acl.txt
/usr/share/doc/haproxy/internals/body-parsing.txt
/usr/share/doc/haproxy/internals/buffer-operations.txt
/usr/share/doc/haproxy/internals/buffer-ops.fig
/usr/share/doc/haproxy/internals/connect-status.txt
/usr/share/doc/haproxy/internals/connection-header.txt
/usr/share/doc/haproxy/internals/connection-scale.txt
/usr/share/doc/haproxy/internals/entities-v2.txt
/usr/share/doc/haproxy/internals/entities.fig
/usr/share/doc/haproxy/internals/entities.pdf
/usr/share/doc/haproxy/internals/entities.svg
/usr/share/doc/haproxy/internals/entities.txt
/usr/share/doc/haproxy/internals/filters.txt
/usr/share/doc/haproxy/internals/hashing.txt
/usr/share/doc/haproxy/internals/header-parser-speed.txt
/usr/share/doc/haproxy/internals/header-tree.txt
/usr/share/doc/haproxy/internals/http-cookies.txt
/usr/share/doc/haproxy/internals/http-docs.txt
/usr/share/doc/haproxy/internals/http-parsing.txt
/usr/share/doc/haproxy/internals/list.fig
/usr/share/doc/haproxy/internals/listener-states.fig
/usr/share/doc/haproxy/internals/listener-states.png
/usr/share/doc/haproxy/internals/lua_socket.fig
/usr/share/doc/haproxy/internals/lua_socket.pdf
/usr/share/doc/haproxy/internals/naming.txt
/usr/share/doc/haproxy/internals/pattern.dia
/usr/share/doc/haproxy/internals/pattern.pdf
/usr/share/doc/haproxy/internals/polling-states.fig
/usr/share/doc/haproxy/internals/repartition-be-fe-fi.txt
/usr/share/doc/haproxy/internals/sequence.fig
/usr/share/doc/haproxy/internals/stats-v2.txt
/usr/share/doc/haproxy/internals/stream-sock-states.fig
/usr/share/doc/haproxy/intro.txt
/usr/share/doc/haproxy/lgpl.txt
/usr/share/doc/haproxy/linux-syn-cookies.txt
/usr/share/doc/haproxy/lua-api
/usr/share/doc/haproxy/lua-api/Makefile
/usr/share/doc/haproxy/lua-api/_static
/usr/share/doc/haproxy/lua-api/_static/channel.fig
/usr/share/doc/haproxy/lua-api/_static/channel.png
/usr/share/doc/haproxy/lua-api/conf.py
/usr/share/doc/haproxy/lua-api/index.rst
/usr/share/doc/haproxy/lua.txt
/usr/share/doc/haproxy/management.txt
/usr/share/doc/haproxy/netscaler-client-ip-insertion-protocol.txt
/usr/share/doc/haproxy/network-namespaces.txt
/usr/share/doc/haproxy/option-http_proxy.cfg
/usr/share/doc/haproxy/peers-v2.0.txt
/usr/share/doc/haproxy/peers.txt
/usr/share/doc/haproxy/proxy-protocol.txt
/usr/share/doc/haproxy/queuing.fig
/usr/share/doc/haproxy/regression-testing.txt
/usr/share/doc/haproxy/ssl.cfg
/usr/share/doc/haproxy/transparent_proxy.cfg
/usr/share/doc/haproxy/wurfl-example.cfg
/usr/share/haproxy
/usr/share/haproxy/400.http
/usr/share/haproxy/403.http
/usr/share/haproxy/408.http
/usr/share/haproxy/500.http
/usr/share/haproxy/502.http
/usr/share/haproxy/503.http
/usr/share/haproxy/504.http
/usr/share/haproxy/README
/usr/share/licenses/haproxy
/usr/share/licenses/haproxy/LICENSE
/usr/share/man/man1/halog.1.gz
/usr/share/man/man1/haproxy.1.gz
/var/lib/haproxy
References
Summary
In this tutorial we learn how to install haproxy on CentOS 8 using yum and dnf.