[undertow-dev] Frontent Load Balancer with Mod-Cluster using a virtual IP address

[Michal Karm Babacek]

Dear Ralf,

there is no such page as /mod_cluster_manager with
Undertow mod_cluster proxy.

One uses JBoss CLI to retrieve runtime information
such as registered workers, their load and deployed contexts.

For instance:

/subsystem=undertow/configuration=filter/mod-cluster=modcluster:read-resource(include-runtime=true, recursive=true, recursive-depth=10)
{
    "outcome" => "success",
    "result" => {
        "advertise-frequency" => 10000,
        "advertise-path" => "/",
        "advertise-protocol" => "httpd",
        "advertise-socket-binding" => "mod-cluster-adv",
        "broken-node-timeout" => 10,
        "cached-connections-per-thread" => 5,
        "connection-idle-timeout" => 60,
        "connections-per-thread" => 10,
        "health-check-interval" => 10000,
        "management-access-predicate" => undefined,
        "management-socket-binding" => "http",
        "max-request-time" => -1,
        "request-queue-size" => 10,
        "security-key" => undefined,
        "security-realm" => undefined,
        "worker" => "default",
        "balancer" => {
            "qa_balancer" => {"node" => {"worker-2" => {
                "load" => 89,
                "status" => "NODE_UP",
                "context" => {"/clusterbench" => {
                    "requests" => 0,
                    "status" => "enabled"
                }}
            }}},
            "mycluster" => {"node" => {"worker-1" => {
                "load" => 87,
                "status" => "NODE_UP",
                "context" => {"/clusterbench" => {
                    "requests" => 0,
                    "status" => "enabled"
                }}
            }}}
        }
    }
}


Cheers
Karm

----- Original Message -----
> From: "ralf boogie blues" <ralf_boogie_blues at bluewin.ch>
> To: sdouglas at redhat.com
> Cc: undertow-dev at lists.jboss.org
> Sent: Sunday, September 20, 2015 11:37:33 AM
> Subject: Re: [undertow-dev] Frontent Load Balancer with Mod-Cluster using a	virtual IP address
> 
> Thanks a lot Stuart, you pointed me to the right direction. We are using
> Wildfly. I added a new interface and added a second socketBinding as you
> have described. That works nicely.
> 
> Really cool, the interface can be configured to listen on a nic name too.
> This is exactly what I am looking for.
> 
> What I didn't manage is only to open the management console. What is the path
> for accessing the management console? I saw in some tests
> "/mod_cluster_manager" but I was not able to access the console with this
> path.
> 
> I think, it would make sense to update the official wildfly undertow load
> balancer documentation:
> https://docs.jboss.org/author/display/WFLY9/Using+Wildfly+as+a+Load+Balancer
> 
> Thanks again
> Ralf
> 
> 
> ----Ursprüngliche Nachricht----
> Von : sdouglas at redhat.com
> Datum : 18/09/2015 - 01:46 (WEDT)
> An : ralf_boogie_blues at bluewin.ch
> Cc : undertow-dev at lists.jboss.org
> Betreff : Re: [undertow-dev] Frontent Load Balancer with Mod-Cluster using a
> 	virtual IP address
> 
> Are you using Wildfly or standalone Undertow? The procedure for configuring a
> listener is different for each. For Wildfly just add a socket binding to the
> interface you want to listen on then add a http-listener in the Undertow
> subsystem that references that binding.
> 
> For standalone Undertow simply call addListener() multiple times for each
> interface you want to listen on.
> 
> Stuart
> 
> ----- Original Message -----
> > From: "ralf boogie blues" <ralf_boogie_blues at bluewin.ch>
> > To: undertow-dev at lists.jboss.org
> > Sent: Wednesday, 16 September, 2015 10:57:33 PM
> > Subject: [undertow-dev] Frontent Load Balancer with Mod-Cluster using a
> > 	virtual IP address
> > 
> > Hi
> > 
> > I trying to replace your Apache Httpd with mod_cluster load balancer with
> > Undertow frontend modcluster as part of Wildfly 9.0.1.
> > 
> > It works fine when I define a 'real' IP address defined in /etc/hosts:
> > 
> > 127.0.0.1 localhost
> > 10.22.62.40 mdzhrnesir01.standard.six-group.net mdzhrnesir01
> > 
> > 
> > But this IP address 10.22.62.117 is not taken by untertow:
> > 
> > ip addr
> > .
> > 8: bond0: <BROADCAST,MULTICAST,MASTER,UP,LOWER_UP> mtu 1500 qdisc noqueue
> > state UP
> > link/ether 00:17:a4:77:f0:b6 brd ff:ff:ff:ff:ff:ff
> > inet 10.22.62.40/24 brd 10.22.62.255 scope global bond0
> > inet 10.22.62.117/24 scope global secondary bond0
> > 
> > 
> > I also faced to problem, that running the example presented by Stuart
> > Douglas
> > doesn't work inside a docker container. Even I execute step by step.
> > 
> > Without digging into the source code, what are the criteria under which
> > Undertow frontend modcluster accepts IP address(es)?
> > 
> > Do you also have a proposal for configuring Undertow modcluster to listen
> > to
> > two interfaces? Say an internal IP address and an virtual external IP
> > address?
> > 
> > I think with Apache, we defined 0.0.0.0 and then Apache with mod_cluster
> > was
> > listening on all interfaces, if I remember correctly.
> > 
> > Thanks a lot in advance
> > Ralf
> > 
> > _______________________________________________
> > undertow-dev mailing list
> > undertow-dev at lists.jboss.org
> > https://lists.jboss.org/mailman/listinfo/undertow-dev
> 
> _______________________________________________
> undertow-dev mailing list
> undertow-dev at lists.jboss.org
> https://lists.jboss.org/mailman/listinfo/undertow-dev

-- 
Sent from my Hosaka Ono-Sendai Cyberspace 7

--
Michal Karm Babacek
☕ JBoss QE, Journeyman
Red Hat Czech | CEST

☎ +420 737 778 560 (cell)
☎ +420 532 294 547 (⇖forwarded⇖)
freenode: #wildfly #phoronix #fedora-devel
✉ mbabacek at redhat.com ✉ karm at redhat.com