HAProxy : HTTP Load Balancing2024/04/16 |
Install HAProxy to configure Load Balancing Server. -----------+---------------------------+--------------------------+------------ | | | |10.0.0.30 |10.0.0.51 |10.0.0.52 +----------+-----------+ +-----------+----------+ +-----------+----------+ | [ dlp.srv.world ] | | [ node01.srv.world ] | | [ node02.srv.world ] | | HAProxy | | Web Server#1 | | Web Server#2 | +----------------------+ +----------------------+ +----------------------+ |
Configure Servers that HTTP connection to HAProxy Server is forwarded to backend Web Servers. |
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[1] | Install HAProxy. |
root@dlp:~ # pkg install -y haproxy
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[2] | Configure HAProxy. |
root@dlp:~ #
vi /usr/local/etc/haproxy.conf # create new global log 127.0.0.1:514 local1 info chroot /var/empty pidfile /var/run/haproxy.pid maxconn 4000 user haproxy group haproxy daemon defaults mode http log global option httplog option dontlognull option http-server-close option forwardfor except 127.0.0.0/8 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 # define frontend ( for [http-in], any name you like ) frontend http-in # listen 80 port bind *:80 # set default backend default_backend backend_servers # define backend backend backend_servers # balance with roundrobin balance roundrobin # define backend servers server node01 10.0.0.51:80 check server node02 10.0.0.52:80 check pw useradd haproxy -u 200 -d /var/empty -s /usr/sbin/nologin root@dlp:~ # service haproxy enable haproxy enabled in /etc/rc.conf root@dlp:~ # service haproxy start Starting haproxy. |
[3] | Configure Syslogd to receive Haproxy log to a file. |
root@dlp:~ #
vi /etc/syslog.conf # line 8 : add
*.err;kern.warning;auth.notice;mail.crit /dev/console
local1.* /var/log/haproxy.log
*.notice;authpriv.none;kern.debug;lpr.info;mail.crit;news.err /var/log/messages
root@dlp:~ # touch /var/log/haproxy.log root@dlp:~ # chown haproxy:haproxy /var/log/haproxy.log root@dlp:~ # sysrc syslogd_flags="-b localhost -C" syslogd_flags: -s -> -b localhost -C root@dlp:~ # service syslogd restart |
[4] | Change settings on Backend Web servers (Apache httpd on this example) to logging X-Forwarded-For header. |
root@node01:~ #
vi /usr/local/etc/apache24/httpd.conf # line 316,317 : change like follows LogFormat " \"%{X-Forwarded-For}i\" %l %u %t \"%r\" %>s %b \"%{Referer}i\" \"%{User-Agent}i\"" combinedLogFormat " \"%{X-Forwarded-For}i\" %l %u %t \"%r\" %>s %b" common
service apache24 reload |
[5] | Verify it works normally to access to frontend HAproxy Server. |
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