<div dir="ltr"><br><div class="gmail_extra"><br><div class="gmail_quote">On 2 December 2015 at 15:58, Marek Posolda <span dir="ltr"><<a href="mailto:mposolda@redhat.com" target="_blank">mposolda@redhat.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
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<div>btv. we actually have some optimization
"auth-server-url-for-backend-requests" on adapter side. This is
useful if application and Keycloak are both running on same
network and using same cluster nodes. In this case, application
can send all backend (out-of-bound) requests like code2token,
refreshToken, to Keycloak auth-server on same cluster node. <br>
<br>
For example if there is cluster with nodes "node1" and "node2" and
application request is processed on "node1", it will also use
"node1" to directly access Keycloak for out-of-bound requests. So
as long as there is sticky session on application side, it will
defacto result in sticky session for application too.<br>
<br>
Not sure if we need to optimize too much for login. Isn't refresh
token used much more often than login?</div></div></blockquote><div><br></div><div>If login is multiple requests (username + password, then otp) then a round robin load balancer would quite likely send the rquests to different nodes.</div><div> </div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div text="#000000" bgcolor="#FFFFFF"><div><span class="HOEnZb"><font color="#888888"><br>
<br>
Marek</font></span><div><div class="h5"><span style="color:#008000;font-weight:bold"><br>
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On 02/12/15 15:50, Marek Posolda wrote:<br>
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<pre>Not sure if callback URI will work, because application may be able to
see just the loadbalancer node and underlying cluster nodes might be
hidden from it.
For example if you have callback URI like
<a href="http://node1:8080/auth/.../token" target="_blank">http://node1:8080/auth/.../token</a>, application may not be able to
directly access host "node1" because it's hidden and application can
access just <a href="http://loadbalancer:8080" target="_blank">http://loadbalancer:8080</a> .
Marek
On 02/12/15 15:34, Bill Burke wrote:
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<pre>IMO, we need to highlight and document that when using a load balancer
in a cluster, sticky sessions should be enabled. We might even want to
consider adding support for sticky sessions for the code2token flow.
The obvious reason is performance. Login can span multiple HTTP
requests. If you have N nodes in the cluster with no clustering you
have the possibility of the same user being retrieved from the database
N times. One time for each authentication request (username/password,
OTP page, required actions) and finally for the code 2 token request.
Until I look into fixing it the auth SPI does a few extra redirects
right now too.
Code 2 token could simply have a callback URI so that the code 2 token
request hits the same machine the code was created on.
</pre>
</blockquote>
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