HAProxy

HAProxy yra nemokamas, labai greitas ir patogus sprendimas siūlantis aukšto pasiekiamumo ir resursų balancavimo bei proxy sprendimus TCP ir HTTP-paremtoms aplikacijoms. Sukurtas aptarnauti labai apkrautas internetines svetaines, aptarnauja pasaulyje labiausiai lankomas. Per metų metus tapo de-facto standartiniu atviro kodo resursų balanceriu, leidžiamu su populiariausiomis Linux distribucijomis ir naudojamas populiarausiose debesų platformose. Nesireklamuojantis įrankis, kurį žino tiktai administratoriai :-)

• https://www.digitalocean.com/community/tutorials/how-to-use-haproxy-to-set-up-http-load-balancing-on-an-ubuntu-vps
• https://lesterchan.net/blog/2015/05/18/getting-real-ip-for-nginx-blocking-ip-on-haproxy/

WebSocket

frontend websocket
bind *:8890 ssl crt /etc/ssl/org/fullchain.pem
   tcp-request inspect-delay 500ms
   tcp-request content accept if HTTP
   default_backend nodes_websocket
frontend mysql
backend nodes_websocket
mode http
option forwardfor
   option http-server-close
   option forceclose
   no option httpclose
   cookie SRVNAME insert
   server app2 10.36.36.9:8890 cookie S2 check
   server app3 10.36.36.10:8890 cookie S3 check

Nginx

frontend nginx
   bind *:80
   bind *:443 ssl crt /etc/ssl/org/fullchain.pem
   redirect scheme https if !{ ssl_fc } # jeigu ne https force redirectas
   mode http
   maxconn 10000
   stats enable # statistikos
   stats uri /haproxy?stats
   # stats realm Strictly\ Private
   # stats auth A_Username:YourPassword
   # stats auth Another_User:passwd
   default_backend nodes_nginx
backend nodes_nginx
   mode http
   balance roundrobin
   option forwardfor
   cookie SRVNAME insert
   server app2 10.36.36.9:80 cookie S2 check
   server app3 10.36.36.10:80 cookie S3 check
   http-request set-header X-Forwarded-Port %[dst_port]
   http-request add-header X-Forwarded-Proto https if { ssl_fc }

MySQL

MySQL serveriuose sukuriam haproxy_check vartotoja:

uninstall plugin validate_password;
create user 'haproxy_check'@'10.36.36.8';

frontend mysql
  bind 10.36.36.8:3307
  mode tcp
  default_backend nodes_mysql
backend nodes_mysql
mode tcp
option tcpka
       option mysql-check user haproxy_check
balance roundrobin
server app2 10.36.36.9:3306 check
server app3 10.36.36.10:3306 check