4:34 a.m.
Hello group,
(coss-post from keycloak-user Mailing List)
the undertow servlet-container is started pretty early during the startup
of the
wildfly application server. However the initialization of the keycloak
server
application might take a while to complete. Within this period requests
that are
sent to the keycloak endpoints result in responses with HTTP Status Code
404.
Is it possible to configure undertow to return a HTTP Status Code 503
(Service Unvailable)
until the keycloak application startup has completed?
This would ease configuring load-balancers and to avoid showing a file not
found
to users during server restarts.
Cheers,
Thomas
3:09 p.m.
You can add the default-response-code attribute in the host element of
the undertow subsystem to make it return 503 by default.
Stuart
On Mon, Jan 30, 2017 at 9:34 PM, Thomas Darimont
<thomas.darimont(a)googlemail.com> wrote:
Hello group,
(coss-post from keycloak-user Mailing List)
the undertow servlet-container is started pretty early during the startup of
the
wildfly application server. However the initialization of the keycloak
server
application might take a while to complete. Within this period requests that
are
sent to the keycloak endpoints result in responses with HTTP Status Code
404.
Is it possible to configure undertow to return a HTTP Status Code 503
(Service Unvailable)
until the keycloak application startup has completed?
This would ease configuring load-balancers and to avoid showing a file not
found
to users during server restarts.
Cheers,
Thomas
_______________________________________________
undertow-dev mailing list
undertow-dev(a)lists.jboss.org
https://lists.jboss.org/mailman/listinfo/undertow-dev
3:44 p.m.
Hi Stuart,
thanks for the reply - I got a similar tip on the keycloak-user list
however if I configure the default-response-code=503
on the (single) host element of the undertow subsystem in Wildfly (10.1.0)
and restart the server then I get a
404 but never a 503 when I access paths of an web app (keycloak) that is
not fully initialized yet.
Seems that I'm seeing the same behaviour as those folks:
https://developer.jboss.org/thread/257526
Is there anything else that one needs to configure to make this work?
In the meantime I played a bit with alternative approaches e.g.:
https://github.com/thomasdarimont/undertow-extensions
Cheers,
Thomas
2017-01-30 22:09 GMT+01:00 Stuart Douglas <sdouglas(a)redhat.com>:
You can add the default-response-code attribute in the host element
of
the undertow subsystem to make it return 503 by default.
Stuart
On Mon, Jan 30, 2017 at 9:34 PM, Thomas Darimont
<thomas.darimont(a)googlemail.com> wrote:
> Hello group,
>
> (coss-post from keycloak-user Mailing List)
>
> the undertow servlet-container is started pretty early during the
startup of
> the
> wildfly application server. However the initialization of the keycloak
> server
> application might take a while to complete. Within this period requests
that
> are
> sent to the keycloak endpoints result in responses with HTTP Status Code
> 404.
>
> Is it possible to configure undertow to return a HTTP Status Code 503
> (Service Unvailable)
> until the keycloak application startup has completed?
>
> This would ease configuring load-balancers and to avoid showing a file
not
> found
> to users during server restarts.
>
> Cheers,
> Thomas
>
> _______________________________________________
> undertow-dev mailing list
> undertow-dev(a)lists.jboss.org
> https://lists.jboss.org/mailman/listinfo/undertow-dev
5:18 a.m.
Quick update
In order to see the 503 Status code specified in the default-response-code
attribute on the host-element
I had to remove the welcome-content filter by omitting the
<location name="/" handler="welcome-content"/>
element.
However even with that config I see the following sequence from a repeated
curl sequence:
watch -n 2 curl -I http://localhost:8080/auth/
Server not started : Connection Refused...
Server Started... : HTTP/1.1 404 Not
Found
Begin Web App Deployment (Keycloak): HTTP/1.1 503 Service Unvailable
Web App Deployed : HTTP/1.1 200 OK
My example configuration
<subsystem xmlns="urn:jboss:domain:undertow:3.0">
<buffer-cache name="default"/>
<server name="default-server">
<ajp-listener name="ajp" socket-binding="ajp"/>
<http-listener name="default" socket-binding="http"
redirect-socket="https"/>
<host name="default-host" alias="localhost"
default-response-code="503">
</host>
</server>
<servlet-container name="default">
<jsp-config/>
<websockets/>
</servlet-container>
<handlers>
</handlers>
<filters>
</filters>
</subsystem>
Cheers,
Thomas
2017-01-30 22:44 GMT+01:00 Thomas Darimont <thomas.darimont(a)googlemail.com>:
Hi Stuart,
thanks for the reply - I got a similar tip on the keycloak-user list
however if I configure the default-response-code=503
on the (single) host element of the undertow subsystem in Wildfly (10.1.0)
and restart the server then I get a
404 but never a 503 when I access paths of an web app (keycloak) that is
not fully initialized yet.
Seems that I'm seeing the same behaviour as those folks:
https://developer.jboss.org/thread/257526
Is there anything else that one needs to configure to make this work?
In the meantime I played a bit with alternative approaches e.g.:
https://github.com/thomasdarimont/undertow-extensions
Cheers,
Thomas
2017-01-30 22:09 GMT+01:00 Stuart Douglas <sdouglas(a)redhat.com>:
> You can add the default-response-code attribute in the host element of
> the undertow subsystem to make it return 503 by default.
>
> Stuart
>
> On Mon, Jan 30, 2017 at 9:34 PM, Thomas Darimont
> <thomas.darimont(a)googlemail.com> wrote:
> > Hello group,
> >
> > (coss-post from keycloak-user Mailing List)
> >
> > the undertow servlet-container is started pretty early during the
> startup of
> > the
> > wildfly application server. However the initialization of the keycloak
> > server
> > application might take a while to complete. Within this period requests
> that
> > are
> > sent to the keycloak endpoints result in responses with HTTP Status Code
> > 404.
> >
> > Is it possible to configure undertow to return a HTTP Status Code 503
> > (Service Unvailable)
> > until the keycloak application startup has completed?
> >
> > This would ease configuring load-balancers and to avoid showing a file
> not
> > found
> > to users during server restarts.
> >
> > Cheers,
> > Thomas
> >
> > _______________________________________________
> > undertow-dev mailing list
> > undertow-dev(a)lists.jboss.org
> > https://lists.jboss.org/mailman/listinfo/undertow-dev
>
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3 comments
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participants (2)
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Stuart Douglas -
Thomas Darimont