====== 29th April 2017 prodapp03 Migration ======



<code> 


step 1 .First will enable maintenance page

step 2 . We are going to add prodapp03 and remove prodapp02 in Haproxy 

## comment following line server prodapp02 10.166.152.19
## uncomment following line server prodapp03 10.166.152.14

</code> 

====== Haproxy config  ======


<code> 



backend learnexa
balance roundrobin
option httplog
option forwardfor
cookie SERVERID insert indirect
source 10.166.152.246
#timeout client 150000ms
timeout connect 35000ms
timeout server 8m
option httpchk HEAD /contact-us/new HTTP/1.1\r\nHost:\ www.learnexa.com\r\nUser-Agent:\ HaProxy
server prodapp01 10.166.152.11:80 check port 80  cookie app1 maxconn 31 inter 5000 rise 2 fall 3
#server prodapp02 10.166.152.19:80 check port 80 cookie app2 maxconn 31 inter 5000 rise 2 fall 3
server prodapp03 10.166.152.14:80 check port 80 cookie app3 maxconn 31 inter 5000 rise 2 fall 3

</code> 

Step 3  haproxy reload 

/etc/init.d/haproxy reload


Step 4 will give for validation \\
**add below host entry in /etc/hosts file ##NOT REQUIRED VPN THIS IS PUBLIC IP** \\
**207.20.54.0  test.learnexa.com **

step 5 once validated result positive 


step 6 remove maintenance page 

step 7 If test result negative will rollback haproxy changes 

step 8 remove  maintenance page