Hi all
I am moving a session by replicating it from one app server to another app
server when a certain scenario occurs.
However, now I would like the haproxy to redirect the traffic to the new app
server where the session resides.
When the certain scenario occurs, I am setting a cookie TRANSITION=X. Where X
is another node on which session has been replicated.
As an example, in the flow below, session is assigned to node A at the end of
first HTTP response. While processing second request on app server, I set the
TRANSITION=X cookie.
Is there a way by which haproxy can alter the node from A to node X in the
JSESSIONID cookie?
>-- GET /URI1 HTTP/1.0 ------------> |
( no cookie, haproxy forwards in load-balancing mode. )
| >-- GET /URI1 HTTP/1.0 ---------->
| X-Forwarded-For: 10.1.2.3
| <-- HTTP/1.0 200 OK -------------<
( no cookie, nothing changed )
<-- HTTP/1.0 200 OK ---------------< |
Set-Cookie: JSESSIONID=A~123 |
>-- GET /URI2 HTTP/1.0 ------------> |
Cookie: JSESSIONID=A~123 |
( the proxy sees the cookie, removes the server name and forwards
to server A which sees the same cookie as it previously sent )
| >-- GET /URI3 HTTP/1.0 ---------->
| Cookie: JSESSIONID=123
| X-Forwarded-For: 10.1.2.3
| <-- HTTP/1.0 200 OK -------------<
( no cookie, nothing changed )
<-- HTTP/1.0 200 OK ---------------< |
Set-Cookie: TRANSITION=X |
Set-Cookie: JSESSIONID=X~123 |
>-- GET /URI2 HTTP/1.0 ------------> |
Cookie: JSESSIONID=X~123 |
( the proxy sees the cookie, removes the server name and forwards
to server X)
regards
Jay Kulkarni
US: +1.6122220086
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