Hi,
Some further info.
The two configs are below, old and new, the differences are minor:
listen Load-Balancer-oldapp
bind *:5041
mode http
balance roundrobin
stats enable
stats hide-version
stats refresh 20s
stats show-node
stats admin if TRUE
stick-table type ip size 1m expire 1h
stick on src
option httpclose
option forwardfor
option httpchk GET /forms/frmservlet?config=oldapp
http-check expect status 200
http-check disable-on-404
server hostingapp2_5041 172.17.2.40:5041 check
server hostingapp3_5041 172.17.2.50:5041 check
option redispatch
listen Load-Balancer-newapp
bind *:5051
mode http
balance roundrobin
stats enable
stats hide-version
stats refresh 20s
stats show-node
stats admin if TRUE
stick-table type ip size 1m expire 1h
stick on src
option httpclose
option forwardfor
option httpchk GET /forms/frmservlet?config=newapp
http-check expect status 200
http-check disable-on-404
server sh1hostingapp4_5051 172.17.2.60:5051
server sh1hostingapp5_5051 172.17.2.70:5051
option redispatch
When I take the IP, port and path from those configs and combine them for
testing I end up with four URLS
http://172.17.2.40:5041/forms/frmservlet?config=oldapp
http://172.17.2.50:5041/forms/frmservlet?config=oldapp
http://172.17.2.60:5051/forms/frmservlet?config=newapp
http://172.17.2.70:5051/forms/frmservlet?config=newapp
If I access all four of those URLs with lynx to show the headers from the
command line on the haproxy server I get the same result from each server,
instantaneous response and HTTP 200 status.
[root@HAProxy1 ~]# lynx -head -dump
http://172.17.2.40:5041/forms/frmservlet?config=oldapp
HTTP/1.1 200 OK
Date: Sun, 07 Aug 2016 19:01:32 GMT
Server: Oracle-Application-Server-11g
Cache-Control: no-cache,no-store
Content-Length: 5496
X-ORACLE-DMS-ECID: 00ia1Oq3joKFw00Fzzw0w00001Co001zZk
X-Powered-By: Servlet/2.5 JSP/2.1
Connection: close
Content-Type: text/html
Content-Language: en
[root@HAProxy1 ~]# lynx -head -dump
http://172.17.2.70:5051/forms/frmservlet?config=newapp
HTTP/1.1 200 OK
Date: Sun, 07 Aug 2016 18:59:29 GMT
Server: Oracle-Application-Server-11g
Cache-Control: no-cache,no-store
Content-Length: 5505
X-ORACLE-DMS-ECID: 00ia1OihrRjDsXH6yvnZ6G0001mS004H^5
X-Powered-By: Servlet/2.5 JSP/2.1
Connection: close
Content-Type: text/html
Content-Language: en
But the haproxy stats page reports L7 timeout if we add in a check on the new
app setup.
Any ideas what I need to check next?
Kind Regards,
John Lanigan
CORE | * +353 (0)25 41400 | *
[email protected]<mailto:[email protected]> | ?
www.coresoftware.ie<http://www.coreibs.ie/>
From: John Lanigan [mailto:[email protected]]
Sent: Thursday 4 August 2016 22:55
To: [email protected]
Subject: Problem with health checking
Hi,
I've been running haproxy 1.4.24 on centos 6.5 for over 2 years, load
balancing a pair of Oracle 11g app servers on Windows 2008r2.
It's worked perfectly the entire time. We have recently built two new app
servers, same version of Oracle 11g on Windows 2012R2.
For health checking we check for http status 200 on the homepage of the
application.
For the new servers the health checking is failing. We are getting a layer 7
timeout. However when I try and access the page using either curl or lynx it
downloads instantly with status 200.
Any tips as to where I go from here in troubleshooting would be great. I've
checked and double checked the config and the only difference for this load
balancer over the existing ones is the IP and port numbers.
Right now we are load balancing without health checking, but obviously that's
not a solution.
Any suggestions would be great, thanks in advance
John
