4 Replies Latest reply on Sep 4, 2014 3:04 AM by sridhar_a.r

Mod_Cluster /context root mapping issue in JBOSS EAP 6.2 with httpd Apache Webserver

sridhar_a.r Aug 25, 2014 11:31 AM

Hi Friends,

1) I have two Jboss EAP 6.2 domain ( say Domain A & Domain B) working in cluster mode.

Domain A : Architecture is as below

Host X Host Y

Node 1 Node2

An Application with context root "/checkin" is deployed in this Domain A

Domain B : Architecture is as below

Host X Host Y

Node 3 Node4

An Application with context root "/checkout" is deployed in this Domain B

2) I have used two httpd apache webserver ( say integration.com & acceptance.com ) :

Application with content root /checkin is hosted via mod_cluster configurartion in integration.com ( www.integation.com/checkin )

Application with content root /checkout is hosted via mod_cluster configurartion in acceptance.com ( www.acceptance.com/checkout )

3)My integation Webserver Configuration is as below:

+++++++++++++++++++++++++++++++++++++++++

Listen 10.9.8.27:8777

Order Allow,Deny

Allow from all

</Directory>

SetHandler mod_cluster-manager

Order Allow,Deny

Allow from all

</Location>

</VirtualHost>

Order Allow,Deny

Allow from all

</Directory>

ServerAdvertise on http://10.9.8.27:8777

AdvertiseGroup 224.0.1.105:8662

</VirtualHost>

8777 - Virtual port used in Webserver

8662 - Multicast port used in domain.xml of domain A

Entry in domain.xml of domain A

<socket-binding name="modcluster" port="0" multicast-address="224.0.1.105" multicast-port="8662"/>

4)My Acceptance Webserver Configuration is as below:

+++++++++++++++++++++++++++++++++++++++++

Listen 10.9.8.23:7777

Order Allow,Deny

Allow from all

</Directory>

SetHandler mod_cluster-manager

Order Allow,Deny

Allow from all

</Location>

</VirtualHost>

Order Allow,Deny

Allow from all

</Directory>

ServerAdvertise on http://10.9.8.23:7777

AdvertiseGroup 224.0.1.105:8682

</VirtualHost>

7777 - Virtual port used in Webserver

8682 - Multicast port used in domain.xml of domain B

Entry in domain.xml of domain B :

<socket-binding name="modcluster" port="0" multicast-address="224.0.1.105" multicast-port="8682"/>

5) My Mod_cluster management console output for integraton Webserver is as follows:

http://www-integration.com/mc/

Node: [1],Name: 44d049b3-f395-3f4b-9ab5-74659b8d84e7,Balancer: mycluster,LBGroup: ,Host: Host A,Port: 8653,Type: ajp,Flushpackets: Off,Flushwait: 10,Ping: 10,Smax: 26,Ttl: 60,Elected: 0,Read: 0,Transfered: 0,Connected: 0,Load: 100

Node: [2],Name: 0e77b697-4484-30f4-a2f8-2c85bcc0b01b,Balancer: mycluster,LBGroup: ,Host: Host B,Port: 8653,Type: ajp,Flushpackets: Off,Flushwait: 10,Ping: 10,Smax: 26,Ttl: 60,Elected: 0,Read: 0,Transfered: 0,Connected: 0,Load: 100

Node: [3],Name: 78d8593e-3799-3bb1-ba06-548b10b69f17,Balancer: mycluster,LBGroup: ,Host: Host B,Port: 8673,Type: ajp,Flushpackets: Off,Flushwait: 10,Ping: 10,Smax: 26,Ttl: 60,Elected: 240,Read: 1090516,Transfered: 0,Connected: 0,Load: 100

Node: [4],Name: fcb7b94f-ab52-33ff-adae-366767025cb7,Balancer: mycluster,LBGroup: ,Host: Host A,Port: 8673,Type: ajp,Flushpackets: Off,Flushwait: 10,Ping: 10,Smax: 26,Ttl: 60,Elected: 8,Read: 423273,Transfered: 0,Connected: 0,Load: 100

Vhost: [1:1:1], Alias: default-host

Vhost: [1:1:2], Alias: localhost

Vhost: [1:1:3], Alias: example.com

Vhost: [2:1:4], Alias: default-host

Vhost: [2:1:5], Alias: localhost

Vhost: [2:1:6], Alias: example.com

Vhost: [3:1:7], Alias: default-host

Vhost: [3:1:8], Alias: localhost

Vhost: [3:1:9], Alias: example.com

Vhost: [4:1:10], Alias: default-host

Vhost: [4:1:11], Alias: localhost

Vhost: [4:1:12], Alias: example.com

Context: [1:1:1], Context: /checkin, Status: ENABLED

Context: [2:1:2], Context: /checkin, Status: ENABLED

Context: [3:1:3], Context: /checkout, Status: ENABLED

Context: [4:1:4], Context: /checkout, Status: ENABLED

6) My Mod_cluster management console output for Acceptance Webserver is as follows:

http://www-acceptance.com/mc/

Vhost: [1:1:1], Alias: default-host

Vhost: [1:1:2], Alias: localhost

Vhost: [1:1:3], Alias: example.com

Vhost: [2:1:4], Alias: default-host

Vhost: [2:1:5], Alias: localhost

Vhost: [2:1:6], Alias: example.com

Vhost: [3:1:7], Alias: default-host

Vhost: [3:1:8], Alias: localhost

Vhost: [3:1:9], Alias: example.com

Vhost: [4:1:10], Alias: default-host

Vhost: [4:1:11], Alias: localhost

Vhost: [4:1:12], Alias: example.com

Context: [1:1:1], Context: /checkin, Status: ENABLED

Context: [2:1:2], Context: /checkin, Status: ENABLED

Context: [3:1:3], Context: /checkout, Status: ENABLED

Context: [4:1:4], Context: /checkout, Status: ENABLED

7) Issue statement :

All 4 Nodes are visible to both the webservers ( integration & acceptance) so content root /checkin & /checkout are accessible from both the webservers but

I need /checkin to be accessible only from www.integration.com and /checkout to be accessible only from www.acceptance.com

i.e.

I need only Node1 and Node2 to Listen to proxy advertisements on 224.0.1.105:8662

I need only Node3 and Node4 to Listen to proxy advertisements on 224.0.1.105:8682

Kindly let me know how I can instruct the worker nodes(Node 1 & Node2) to join only a specified <multicast_addr:port> and also instruct worker nodes(Node 3 & Node 4) to join <some_other_multicast_addr:some_other_port>

Thanks in Advance

Regards

Sridhar

1. Re: Mod_Cluster /context root mapping issue in JBOSS EAP 6.2 with httpd Apache Webserver

jfclere Sep 1, 2014 5:10 AM (in response to sridhar_a.r)

Hm that looks weird, which OS are you using?
You can use advertise-security-key to solve the problem. Having 2 different AdvertiseSecurityKey in each httpd.
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2. Re: Mod_Cluster /context root mapping issue in JBOSS EAP 6.2 with httpd Apache Webserver

rhusar Sep 1, 2014 11:10 AM (in response to sridhar_a.r)

IIRC one of the operating systems received multicast traffic regardless of what is the configured port.

Can you try with different multicast addresses (even the port could be the same then)?

Also as suggested, using different AdvertiseSecurityKey key pairs will solve the problem. Which is the recommended practice as well.
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3. Re: Mod_Cluster /context root mapping issue in JBOSS EAP 6.2 with httpd Apache Webserver

rhusar Sep 1, 2014 11:18 AM (in response to rhusar)

IIRC one of the operating systems received multicast traffic regardless of what is the configured port.

See this entry on promiscuos traffic PromiscuousTraffic, it hasn't been updated since 2009, but you should get the gist and maybe can run the test in your environment.
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4. Re: Mod_Cluster /context root mapping issue in JBOSS EAP 6.2 with httpd Apache Webserver

sridhar_a.r Sep 4, 2014 3:04 AM (in response to jfclere)

Hi Jean,

My set up is in Solaris environment . I haven't tired advertise-security-key. can i know like what can be used as a key. ?
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