My file bash, and configurate for linux

http://ariaf.my.id/linux_aria/networking/08 - haproxy.html

ha proxy

  • High Availability Proxy

haproxy

  • install
    • sudo apt install haproxy
  • config
    • vi /etc/haproxy/haproxy.cfg

configuration haproxy

template

frontend fe
        bind *:80
        default_backend be

backend be
        balance roundrobin
        server server1 127.0.0.1:8081
        server server2 127.0.0.1:8082

backup, check

backend be
        server server1 127.0.0.1:8081 check maxconn 30
        server server2 127.0.0.1:8082 backup

weight => berapa kali koneksi di satu sever

backend be
    server  app1 127.0.0.1:8081 check weight 3
    server  app1_ 127.0.0.1:8082 check weight 1

acl

frontend fe
    bind *:80
    use_backend app-a if { path /a } || { path_beg /a/ }
    use_backend app-b if { path /b } || { path_beg /b/ }

    acl ig path /ig
    # acl ig path_beg /ig
    use_backend ig_be if ig

backend app-a
    # http-request replace-path /a(/)?(.*) /\2
    http-request replace-path ^/a(/.*)?$ /\1
    server server1 127.0.0.1:8080 check maxconn 30

backend app-b
    # strip the prefix '/b' off of the path
    http-request replace-path /b(/)?(.*) /\2
    server server1 127.0.0.1:8081 check maxconn 30

backend ig
    http-request set-uri /main.html
    server ig_aria 127.0.0.1:8000/main.html check

stats

frontend stats
        bind *:8080 # Listening port. A different port can also be used.
        mode http
        stats enable  # This enables the stats page
        # stats hide-version
        # stats realm Haproxy\ Statistics  # A custom title for the stats window
        stats uri /stats  # A custom URI for the stats page
        # stats auth admin:admin # Login credentials

backups with many backup

backend app
    balance     roundrobin
    option      allbackups
    server  app1 127.0.0.1:8081 check
    server  app2 127.0.0.1:8082 check backup
    server  app3 127.0.0.1:8083 check backup

http response status

config error

defaults
    errorfile 503 /etc/haproxy/error/503.http

frontend fe
    errorfiles err
    http-response return  status 404  default-errorfiles  if { status 404 }

http-errors err
    errorfile 404 /etc/haproxy/error/404.http

error config 404.http

HTTP/1.1 403 Forbidden
Cache-Control: no-cache
Connection: close
Content-Type: text/html

<!DOCTYPE html>
<html>
   <body>
      <h1>403 Forbidden</h1>
      <p>Sorry, but you are not authorized to view this page.</p>
   </body>
</html>