HAProxy : HTTP Load Balancing
HAProxy : HTTP Load Balancing
2015/02/18
|
Install HAProxy to configure Load Balancing Server.
This example based on the environment like follows. |
-------+-----------------------------------------------
|
+-------------------+--------------------+
|10.0.0.30 |10.0.0.31 |10.0.0.32
+-----+-----+ +-------+------+ +-------+------+
| Frontend | | Backend#1 | | Backend#2 |
| HAProxy | | Web Server | | Web Server |
+-----------+ +--------------+ +--------------+
|
Configure Servers that HTTP connection to HAProxy Server is forwarded to backend Web Servers.
| |
| [1] | Install HAProxy. |
| [root@dlp ~]#
yum -y install haproxy
|
| [2] | Configure HAProxy. |
| [root@dlp ~]#
mv /etc/haproxy/haproxy.cfg /etc/haproxy/haproxy.cfg.org
[root@dlp ~]#
vi /etc/haproxy/haproxy.cfg
# create new
global
# for logging section
log 127.0.0.1 local2 info
chroot /var/lib/haproxy
pidfile /var/run/haproxy.pid
# max per-process number of connections
maxconn 256
# process' user and group
user haproxy
group haproxy
# makes the process fork into background
daemon defaults
# running mode
mode http
# use global settings
log global
# get HTTP request log
option httplog
# timeout if backends do not reply
timeout connect 10s
# timeout on client side
timeout client 30s
# timeout on server side
timeout server 30s
# define frontend ( set any name for "http-in" section )
frontend http-in
# listen 80
bind *:80
# set default backend
default_backend backend_servers
# send X-Forwarded-For header
option forwardfor
# define backend
backend backend_servers
# balance with roundrobin
balance roundrobin
# define backend servers
server www01 10.0.0.31:80 check
server www02 10.0.0.32:80 check
systemctl start haproxy
[root@dlp ~]#
systemctl enable haproxy
|
| [3] | Configure Rsyslog to get logs for HAProxy. |
[root@dlp ~]#
vi /etc/rsyslog.conf
# line 15,16: uncomment, lne 17: add
$ModLoad imudp $UDPServerRun 514
$AllowedSender UDP, 127.0.0.1
# line 54: change like follows
*.info;mail.none;authpriv.none;cron.none
,local2.none
/var/log/messageslocal2.* /var/log/haproxy.log
systemctl restart rsyslog
|
| [4] | Change httpd settings on Backends to logging X-Forwarded-For header. |
[root@www ~]#
vi /etc/httpd/conf/httpd.conf
# line 196: change like follows
LogFormat "
\"%{X-Forwarded-For}i\"
%l %u %t \"%r\" %>s %b \"%{Referer}i\" \"%{User-Agent}i\"" combined
systemctl restart httpd
|
| [5] | Make sure all works fine to access to the frontend server from a Client with HTTP like follows. |
 |
 |
Comentários
Postar um comentário