Question
How to do Session Transfer from one server to another in Haproxy?
We have a haproxy that load balances two tomcat servers say app1 and app2 . We have set weights for each of these for instance app1 has weights 255 and the other has app2 0. If any case app1 goes down how to transfer the session and connection seamlessly to app2. Is there we can achieve it through haproxy. We are completely new in trying out haproxy. We will attach our haproxy config below kindly guide us
global
log 127.0.0.1 local0
chroot /var/lib/haproxy
pidfile /var/run/haproxy.pid
maxconn 4000
user haproxy
group haproxy
stats socket /etc/haproxy/haproxysock level admin
daemon defaults
mode http
log global
option dontlognull
option http-server-close
option httplog
option redispatch
timeout connect 10000
timeout client 300000
timeout server 300000
maxconn 60000
retries 3
stats uri /haproxy_stats
stats realm HAProxy\ Statistics
stats auth hadmin:unMetric_2012
frontend main *:5000
acl is_app path_beg -i /static /images /javascript /stylesheets /js
acl is_app path_end -i .jpg .gif .png .css .js
acl is_app path_end -i /app/
use_backend app if is_app
default_backend app backend static
balance roundrobin
server static 127.0.0.1:4331 check backend app option httpchk GET /app
balance roundrobin
reqrep ^([^\ :]*)/app((/?.*)*) \1/app\2
cookie uid preserve indirect
stick-table type string len 40 size 5M expire 60m
stick store-response set-cookie(sid) table app stick on cookie(sid) table app
stick on url_param(sid) table app server app1 demo1.unmetric.com:8080 cookie s1 weight 255 check
server app2 demo2.unmetric.com:8080 cookie s2 weight 0 check
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