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Selamat pagi sobat blogger sekalian, Pada kesempatan kali ini saya akan share bagaimana cara install haproxy di centos 8 dan bagaimana cara konfigurasinya. HAProxy adalah sebuah aplikasi opensource berbasis Linux yang biasa digunakan sebagai load balancing trafic jaringan.
Pada tutorial kali ini, sobat akan belajar cara menginstal dan mengkonfigurasi HAProxy di Centos 8 Server. Pada LAB kali ini saya mengunakan 4 server diantaranya adalah sebagai berikut:
No | Hostname Server | IP Address | OS | Keterangan |
1 | Node1.webserver | 192.168.0.223 | CentOS 7 | Web Server 1 |
2 | Node2.webserver | 192.168.0.222 | CentOS 7 | Web Server 2 |
3 | Srv1.haproxy | 192.168.0.221 | CentOS 8 | Haproxy Server |
4 | Srv2.dnsserver | 192.168.0.220 | CentOS 8 | DNS Server |
Untuk masing-masing Web Server disini sudah saya masukan file websitenya dan setting Virtualhost Untuk settingannya bisa lihat postingan dibawah ini.
1. Node1.webserver
2. Node2.webserver
1. Setting Hosts
Setting Host pada masing-masing Server HAProxy, node1 dan node2[[email protected] ~]# nano /etc/hosts
Masukan IP Address dan hostname HAProxy, node1 dan node2
127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4
::1 localhost localhost.localdomain localhost6 localhost6.localdomain6
192.168.0.221 srv1.haproxy srv1
192.168.0.222 node2.webserver node2
192.168.0.223 node1.webserver node12. Install HAProxy
Untuk install HAProxy jalankan perintah berikut[[email protected] ~]# dnf install -y haproxyAktifkan Service HAProxy
[[email protected] ~]# systemctl start haproxyCek status HAProxy
[[email protected] ~]# systemctl enable haproxy
[[email protected] ~]# systemctl status haproxy
● haproxy.service - HAProxy Load Balancer
Loaded: loaded (/usr/lib/systemd/system/haproxy.service; enabled; vendor pre>
Active: active (running) since Sun 2020-06-14 11:50:47 WIB; 2min 7s ago
Main PID: 23539 (haproxy)
Tasks: 2 (limit: 11490)
Memory: 2.9M
CGroup: /system.slice/haproxy.service
├─23539 /usr/sbin/haproxy -Ws -f /etc/haproxy/haproxy.cfg -p /run/ha>
└─23541 /usr/sbin/haproxy -Ws -f /etc/haproxy/haproxy.cfg -p /run/ha>
Jun 14 11:50:47 srv1.haproxy systemd[1]: Starting HAProxy Load Balancer...
Jun 14 11:50:47 srv1.haproxy systemd[1]: Started HAProxy Load Balancer.
3. Konfigurasi HAProxy
Copy file master haproxy.cfg pada direktori /etc/haproxy[[email protected] ~]# cd /etc/haproxy/Edit file haproxy.cfg
[[email protected] haproxy]# cp haproxy.cfg haproxy.cfg.ori
[[email protected] haproxy]# nano haproxy.cfg
Edit File seperti dibawah ini
#---------------------------------------------------------------------
# Global settings
#---------------------------------------------------------------------
global
log 127.0.0.1 local2
chroot /var/lib/haproxy
pidfile /var/run/haproxy.pid
maxconn 4000
user haproxy
group haproxy
daemon
# turn on stats unix socket
stats socket /var/lib/haproxy/stats
# utilize system-wide crypto-policies
ssl-default-bind-ciphers PROFILE=SYSTEM
ssl-default-server-ciphers PROFILE=SYSTEM
#---------------------------------------------------------------------
# common defaults that all the 'listen' and 'backend' sections will
# use if not designated in their block
#---------------------------------------------------------------------
defaults
mode http
log global
option httplog
option dontlognull
option http-server-close
option forwardfor except 127.0.0.0/8
option redispatch
retries 3
timeout http-request 10s
timeout queue 1m
timeout connect 10s
timeout client 1m
timeout server 1m
timeout http-keep-alive 10s
timeout check 10s
maxconn 3000
#---------------------------------------------------------------------
# HAProxy Monitoring Config
#---------------------------------------------------------------------
listen haproxy-monitoring
bind *:8080 # HAProxy monitoring port 8080
mode http
option forwardfor
option httpclose
stats enable
stats show-legends
stats refresh 5s
stats uri /stats # url untuk monitoring HAProxy
stats realm Haproxy\ Statistics
stats auth admin:password # User dan password untuk login
stats admin if TRUE
default_backend backend-server # Monitoring backend
#---------------------------------------------------------------------
# main frontend which proxys to the backends
#---------------------------------------------------------------------
frontend main
bind *:80
option http-server-close
option forwardfor
default_backend backend-server
#---------------------------------------------------------------------
# round robin balancing between the various backends
#---------------------------------------------------------------------
backend backend-server
balance roundrobin
option httpchk HEAD / HTTP/1.1\r\nHost:\ localhost
server node1.webserver 192.168.0.223:80 check
server node2.webserver 192.168.0.222:80 check
Edit file konfigurasi rsyslog.conf
[[email protected] haproxy]# nano /etc/rsyslog.confHilangkan tanda # pada baris 19-20 lalu tambahkan pada baris 21
# Provides UDP syslog reception
# for parameters see http://www.rsyslog.com/doc/imudp.html
module(load="imudp") # needs to be done just once
input(type="imudp" port="514")
$AllowedSender UDP, 127.0.0.1
Tambahkan pada baris 48
# Log anything (except mail) of level info or higher.
# Don't log private authentication messages!
*.info;mail.none;authpriv.none;cron.none /var/log/messages
local2.* /var/log/haproxy.log
Restart service HAProxy dan rsyslog
[[email protected] haproxy]# systemctl restart haproxy
[[email protected] haproxy]# systemctl restart rsyslog
Cek status HAProxy pastikan tidak terjadi error
[[email protected] ~]# systemctl status haproxy
● haproxy.service - HAProxy Load Balancer
Loaded: loaded (/usr/lib/systemd/system/haproxy.service; enabled; vendor preset: disabled)
Active: active (running) since Sun 2020-06-14 14:48:09 WIB; 9min ago
Process: 24072 ExecStartPre=/usr/sbin/haproxy -f $CONFIG -c -q (code=exited, status=0/SUCCESS)
Main PID: 24073 (haproxy)
Tasks: 2 (limit: 11490)
Memory: 2.7M
CGroup: /system.slice/haproxy.service
├─24073 /usr/sbin/haproxy -Ws -f /etc/haproxy/haproxy.cfg -p /run/haproxy.pid
└─24076 /usr/sbin/haproxy -Ws -f /etc/haproxy/haproxy.cfg -p /run/haproxy.pid
Jun 14 14:48:09 srv1.haproxy systemd[1]: Stopped HAProxy Load Balancer.
Jun 14 14:48:09 srv1.haproxy systemd[1]: Starting HAProxy Load Balancer...
Jun 14 14:48:09 srv1.haproxy systemd[1]: Started HAProxy Load Balancer.
Tambahkan port 80, 443 dan 8080 pada Firewalld
[[email protected] ~]# firewall-cmd --add-port=80/tcp --permanent
[[email protected] ~]# firewall-cmd --add-port=443/tcp --permanent
[[email protected] ~]# firewall-cmd --add-port=8080/tcp --permanent
[[email protected] ~]# firewall-cmd --reloadCek port[[email protected] ~]# netstat -atpn
Active Internet connections (servers and established)
Proto Recv-Q Send-Q Local Address Foreign Address State PID/Program name
tcp 0 0 0.0.0.0:80 0.0.0.0:* LISTEN 24076/haproxy
tcp 0 0 0.0.0.0:8080 0.0.0.0:* LISTEN 24076/haproxy
tcp 0 0 0.0.0.0:22 0.0.0.0:* LISTEN 862/sshd
tcp 0 0 192.168.0.221:80 192.168.0.100:65174 TIME_WAIT -
tcp 0 0 192.168.0.221:80 192.168.0.100:65176 TIME_WAIT -
tcp 0 0 192.168.0.221:80 192.168.0.100:65175 TIME_WAIT -
tcp 0 0 192.168.0.221:8080 192.168.0.100:12435 TIME_WAIT -
tcp 0 0 192.168.0.221:8080 192.168.0.100:12433 TIME_WAIT -
tcp 0 64 192.168.0.221:22 192.168.0.100:1400 ESTABLISHED 23563/sshd: kris [p
tcp 0 0 192.168.0.221:8080 192.168.0.100:12430 TIME_WAIT -
tcp 0 0 192.168.0.221:80 192.168.0.100:65171 TIME_WAIT -
tcp 0 0 192.168.0.221:8080 192.168.0.100:65183 TIME_WAIT -
tcp 0 0 192.168.0.221:8080 192.168.0.100:12429 TIME_WAIT -
tcp 0 0 192.168.0.221:8080 192.168.0.100:12434 TIME_WAIT -
tcp 0 0 192.168.0.221:80 192.168.0.100:65172 TIME_WAIT -
tcp 0 0 192.168.0.221:80 192.168.0.100:65173 TIME_WAIT -
tcp6 0 0 :::22 :::* LISTEN 862/sshd
Untuk pengetesan akses IP Address Server HAProxy pada web browser, jika berhasil HAProxy akan mengambil alih dari Server Backend node1 dan node2.
Arahkan IP DNS Client ke DNS Server
Lalu akses menggunakan nama domain
Untuk memonitoring HAProxy Akses melalui browser http://IP_Address:8080/stats lalu masukan user dan password yang sebelumnya kita buat.
Tampilan Monitoring HAProxy
HAProxy akan memberikan alert jika ada salah satu node sedang Down
5. Setting SSL
Masuk ke direktori /etc/pki/tls/certs/[[email protected] ~]# cd /etc/pki/tls/certs/Lalu buat sertifikat self-signed baru dan isi beberapa pertanyaan yang diajukan.
[[email protected] certs]# openssl req -x509 -nodes -newkey rsa:2048 -keyout /etc/pki/tls/certs/haproxy.pem -out /etc/pki/tls/certs/haproxy.pem -days 365Atur permission file sertifikat tersebut
Generating a RSA private key
.............+++++
................................................................+++++
writing new private key to '/etc/pki/tls/certs/haproxy.pem'
-----
You are about to be asked to enter information that will be incorporated
into your certificate request.
What you are about to enter is what is called a Distinguished Name or a DN.
There are quite a few fields but you can leave some blank
For some fields there will be a default value,
If you enter '.', the field will be left blank.
-----
Country Name (2 letter code) [XX]:IN
State or Province Name (full name) []:Jawa Barat
Locality Name (eg, city) [Default City]:Jakarta
Organization Name (eg, company) [Default Company Ltd]:PT.abc
Organizational Unit Name (eg, section) []:Informasi Teknologi
Common Name (eg, your name or your server's hostname) []:srv1.haproxy
Email Address []:[email protected]
[[email protected] certs]# chmod 600 haproxy.pemEdit file haproxy.cfg lalu edit file seperti dibawah ini
[[email protected] certs]# nano /etc/haproxy/haproxy.cfgRestart service HAProxy
global
...
maxsslconn 256
tune.ssl.default-dh-param 2048
...
frontend main
bind *:443 ssl crt /etc/pki/tls/certs/haproxy.pem
[[email protected] certs]# systemctl restart haproxy
Maka jika kita membuka alamat website tersebut pada web-browser client, server backend yang akan mengambil alih webserver tersebut dengan menggunakan port 443(https).
Demikian kira-kira artikel Cara Install HAProxy di Centos 8 ini saya buat. Semoga bermafaat untuk kita semua. Silahkan Share Jika sobat merasa postingan ini bermanfaat. Sekian & Terimakasih Salam.
