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How to install HAProxy Load Balancer


https://www.linkedin.com/pulse/how-setup-high-availability-load-balancer-haproxy-web-ali-bin-akhtar

https://docs.rockylinux.org/guides/proxies/haproxy_apache_lxd/

https://www.redswitches.com/blog/haproxy-configuration/



 https://www.digitalocean.com/community/tutorials/how-to-use-haproxy-to-set-up-http-load-balancing-on-an-ubuntu-vps

https://docs.severalnines.com/docs/clustercontrol/user-guide-gui/


###################################################################

Only Haproxy install no need apache and other services.


apt update -y

apt upgrade -t

apt upgrade -y

hostnamectl

hostnamectl set-hostname loadbalancer.server.com

hostnamectl

apt show haproxy

apt install software-properties-common

add-apt-repository ppa:vbernat/haproxy-2.8

apt install gnupg gnupg-agent -y

add-apt-repository ppa:vbernat/haproxy-2.8

apt update -y

apt install haproxy

haproxy -v

cp -a /etc/haproxy/haproxy.cfg{,.orig}

nano /etc/haproxy/haproxy.cfg


#######START######

global

log /dev/log local0

log /dev/log local1 notice

chroot /var/lib/haproxy

stats socket /run/haproxy/admin.sock mode 660 level admin

stats timeout 30s

user haproxy

group haproxy

daemon


# Default SSL material locations

ca-base /etc/ssl/certs

crt-base /etc/ssl/private


# See: https://ssl-config.mozilla.org/#server=haproxy&server-version=2.0.3&config=intermediate

        ssl-default-bind-ciphers ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-CHACHA20-POLY1305:ECDHE-RSA-CHACHA20-POLY1305:DHE-RSA-AES128-GCM-SHA256:DHE-RSA-AES256-GCM-SHA384

        ssl-default-bind-ciphersuites TLS_AES_128_GCM_SHA256:TLS_AES_256_GCM_SHA384:TLS_CHACHA20_POLY1305_SHA256

        ssl-default-bind-options ssl-min-ver TLSv1.2 no-tls-tickets


defaults

log global

mode http

option httplog

option dontlognull

        timeout connect 5000

        timeout client  50000

        timeout server  50000

errorfile 400 /etc/haproxy/errors/400.http

errorfile 403 /etc/haproxy/errors/403.http

errorfile 408 /etc/haproxy/errors/408.http

errorfile 500 /etc/haproxy/errors/500.http

errorfile 502 /etc/haproxy/errors/502.http

errorfile 503 /etc/haproxy/errors/503.http

errorfile 504 /etc/haproxy/errors/504.http


frontend haproxy-main

    bind *:80

    option forwardfor  

    default_backend apache_webservers    


backend apache_webservers

    balance roundrobin

    server websvr1 192.168.1.10:80 check

    server websvr2 192.168.1.11:80 check

    server websvr3    192.168.1.12:80 check

    server websvr4    192.168.1.13:80 check

    server websvr5    192.168.1.14:80 check

    server websvr6    192.168.1.15:80 check

    server websvr7    192.168.1.16:80 check

    server websvr8    192.168.1.17:80 check

    server websvr9    192.168.1.18:80 check

###WEB SERVER IPs#####

listen stats

    bind :8800

    stats enable

    stats uri /

    stats hide-version

    stats auth admin:admin  #username:password for haproxy webui

    default_backend apache_webservers


###########END##################


systemctl restart haproxy

systemctl enable haproxy

systemctl status haproxy


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