HAProxy como Reverse Proxy

4 mayo, 2020 Sin comentarios

Preparación del entorno

Para estas pruebas se generaron tres contenedores Ubuntu Server 18.04 con LXC sobre Kubuntu Desktop 18.04

+------------+---------+----------------------+------+------------+-----------+
|   NOMBRE   | ESTADO  |         IPV4         | IPV6 |    TIPO    | SNAPSHOTS |
+------------+---------+----------------------+------+------------+-----------+
| ubuntu-ha  | RUNNING | 10.56.142.111 (eth0) |      | PERSISTENT | 0         |
+------------+---------+----------------------+------+------------+-----------+
| ubuntu-wp1 | RUNNING | 10.56.142.244 (eth0) |      | PERSISTENT | 0         |
+------------+---------+----------------------+------+------------+-----------+
| ubuntu-wp2 | RUNNING | 10.56.142.34 (eth0)  |      | PERSISTENT | 0         |
+------------+---------+----------------------+------+------------+-----------+

HAProxy

En ubuntu-ha se instaló haproxy y modificó el archivo de configuración para que redirija el tráfico a ubuntu-wp1 o ubuntu-wp2, según la URL destino (wp1.local o wp2.local).

root@ubuntu-ha:~# apt-get install haproxy

y en /etc/haproxy/haproxy.cfg

global
    daemon
    maxconn 256
    user    haproxy
    group   haproxy
    log     127.0.0.1       local0
    log     127.0.0.1       local1  notice

defaults
	mode	http
	log     global
	timeout connect 5000ms
	timeout client  50000ms
	timeout server  50000ms
	stats enable
	stats uri /haproxy?stats

frontend localnodes
    bind *:8080
    mode http
    use_backend wp1 if { hdr(host) -i wp1.local }
    use_backend wp2 if { hdr(host) -i wp2.local }    

backend wp1
    server wp1 10.56.142.244:80

backend wp2
    server wp2 10.56.142.34:80

Los parámetros stats habilitan una página de estadisticas sobre el uso de HAProxy

Sitio wp1.local (Apache)

En ubuntu-wp1 se instaló y configuró Apache2, PHP7.2 y MySql Server con una copia de este blog para generar contenido.

root@ubuntu-wp1:~# apt-get install apache2 php libapache2-mod-php php-mysql mysql-server

Sitio wp2.local (Nginx)

En ubuntu-wp2 se instaló y configuró Nginx, PHP7.2 y Mysql Server con otra copia de este blog para generar contenido.

root@ubuntu-wp2:~# apt-get install nginx php php-fpm php-mysql mysql-server

En /etc/nginx/sites-avaible/default se modificaron las siguientes lineas:

index index.php;

	location ~ \.php$ {
		include snippets/fastcgi-php.conf;
	
		# With php-fpm (or other unix sockets):
		fastcgi_pass unix:/var/run/php/php7.2-fpm.sock;
		# With php-cgi (or other tcp sockets):
		#fastcgi_pass 127.0.0.1:9000;
	}

	location ~ /\.ht {
		deny all;
	}

Para diferenciar los sitios se modificó el encabezado agregando el nombre del Host.

Acceso a http://wp1.local desde la notebook

Acceso a http://wp2.local desde la notebook

Test de Stress

Se realizó desde un host externo con Apache Benchmark con 1000 accesos y 100 concurrencias a cada uno de los sitios publicados.

pablo@laptop:~$ ab -k -n1000 -c100 -H 'Accept-Encoding: gzip,deflate' http://wp1.local/
This is ApacheBench, Version 2.3 <$Revision: 1807734 $>
Copyright 1996 Adam Twiss, Zeus Technology Ltd, http://www.zeustech.net/
Licensed to The Apache Software Foundation, http://www.apache.org/

Benchmarking wp1.local (be patient)
Completed 100 requests
Completed 200 requests
Completed 300 requests
Completed 400 requests
Completed 500 requests
Completed 600 requests
Completed 700 requests
Completed 800 requests
Completed 900 requests
Completed 1000 requests
Finished 1000 requests


Server Software:        Apache/2.4.29
Server Hostname:        wp1.local
Server Port:            80

Document Path:          /
Document Length:        9488 bytes

Concurrency Level:      100
Time taken for tests:   34.707 seconds
Complete requests:      1000
Failed requests:        920
   (Connect: 0, Receive: 0, Length: 920, Exceptions: 0)
Non-2xx responses:      913
Keep-Alive requests:    1000
Total transferred:      3575219 bytes
HTML transferred:       3264024 bytes
Requests per second:    28.81 [#/sec] (mean)
Time per request:       3470.670 [ms] (mean)
Time per request:       34.707 [ms] (mean, across all concurrent requests)
Transfer rate:          100.60 [Kbytes/sec] received

Connection Times (ms)
              min  mean[+/-sd] median   max
Connect:        0    4  10.9      0      40
Processing:   173  985 3175.4    282   34662
Waiting:      173  985 3175.4    281   34662
Total:        173  989 3181.0    282   34702

Percentage of the requests served within a certain time (ms)
  50%    282
  66%    329
  75%    370
  80%    390
  90%   2371
  95%   3145
  98%   4579
  99%  12671
 100%  34702 (longest request)
pablo@laptop:~$ ab -k -n1000 -c100 -H 'Accept-Encoding: gzip,deflate' http://wp2.local/
This is ApacheBench, Version 2.3 <$Revision: 1807734 $>
Copyright 1996 Adam Twiss, Zeus Technology Ltd, http://www.zeustech.net/
Licensed to The Apache Software Foundation, http://www.apache.org/

Benchmarking wp2.local (be patient)
Completed 100 requests
Completed 200 requests
Completed 300 requests
Completed 400 requests
Completed 500 requests
Completed 600 requests
Completed 700 requests
Completed 800 requests
Completed 900 requests
Completed 1000 requests
Finished 1000 requests


Server Software:        nginx/1.14.0
Server Hostname:        wp2.local
Server Port:            80

Document Path:          /
Document Length:        47713 bytes

Concurrency Level:      100
Time taken for tests:   22.371 seconds
Complete requests:      1000
Failed requests:        0
Keep-Alive requests:    0
Total transferred:      48204000 bytes
HTML transferred:       47713000 bytes
Requests per second:    44.70 [#/sec] (mean)
Time per request:       2237.120 [ms] (mean)
Time per request:       22.371 [ms] (mean, across all concurrent requests)
Transfer rate:          2104.23 [Kbytes/sec] received

Connection Times (ms)
              min  mean[+/-sd] median   max
Connect:       16   27  12.7     26     291
Processing:   136 2100 330.7   2174    2508
Waiting:       88 2047 331.6   2123    2431
Total:        165 2127 330.2   2201    2541

Percentage of the requests served within a certain time (ms)
  50%   2201
  66%   2224
  75%   2237
  80%   2244
  90%   2262
  95%   2287
  98%   2370
  99%   2429
 100%   2541 (longest request)

Estadísticas de HAProxy

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