Cellar Clustering in karaf is not working properly

[Chandan <ch...@in.bosch.com>]

Hello,

I followed the steps mentioned here 

https://karaf.apache.org/manual/cellar/latest-4/#_enable_http_balancer

In both the machines i installed cellar and did the tcp/ip configuration by
adding IP of both machines. 
they got interconnected. 

In first machine, 
karaf@node1()> feature:install http 
karaf@node1()> feature:install http-whiteboard 
karaf@node1()> feature:repo-add cellar 4.0.0 
karaf@node1()> feature:install cellar 
karaf@node1()> cluster:feature-install default cellar-http-balancer 
karaf@node1()> feature:install webconsole 
 karaf@node1()>http:list 
karaf@node1()> cluster:http-list default 

In second machine 

karaf@node2()> feature:install http 
karaf@node2()> feature:install http-whiteboard 
karaf@node2()> feature:repo-add cellar 4.0.0 
karaf@node2()> feature:install cellar 
karaf@node2()> cluster:http-list default 
karaf@node2()> http:list

105 | KarafOsgiManager           | ServletModel-2  | Undeployed  |
/system/console     | [/system/console/*]
107 | InstancePlugin             | ServletModel-7  | Deployed    | /instance          
| [/instance/*]
105 | ResourceServlet            | /res            | Deployed    |
/system/console/res | [/system/console/res/*]
104 | GogoPlugin                 | ServletModel-4  | Deployed    | /gogo              
| [/gogo/*]
102 | FeaturesPlugin             | ServletModel-12 | Deployed    | /features          
| [/features/*]
105 | KarafOsgiManager           | ServletModel-9  | Deployed    |
/system/console     | [/system/console/*]
106 | CellarBalancerProxyServlet | ServletModel-14 | Failed      |
/system/console/res | [/system/console/res/*]
106 | CellarBalancerProxyServlet | ServletModel-15 | Failed      |
/system/console     | [/system/console/*]
106 | CellarBalancerProxyServlet | ServletModel-16 | Deployed    | /cxf               
| [/cxf/*]

I stop sync both the clustering.

In first machine, i added cxf features and deployed one web service bundle.
As per the documentation,

if i hit the browser with below url
localhost:8181/system/console, it should open up first machine web console
from second machine

But for me it is opening second machine web console itself.



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Re: Cellar Clustering in karaf is not working properly

[Jean-Baptiste Onofré <jb...@nanthrax.net>]

What you are doing is not correct. If you deploy the servlet (here the web console) on all nodes the cellar load balancer doesn't make sense.

The cellar load balancer creates a proxy on nodes where the servlet is not installed and proxy and balance to the nodes where it's installed.

If your case you should have a third node without the servlets installed proxy and balancing to the two others.

Take a look on the use case described on http://blog.nanthrax.net (search for cellar).

Regards
JB



On Aug 17, 2016, 12:50, at 12:50, Chandan <ch...@in.bosch.com> wrote:
>Hello,
>
>I followed the steps mentioned here 
>
>https://karaf.apache.org/manual/cellar/latest-4/#_enable_http_balancer
>
>In both the machines i installed cellar and did the tcp/ip
>configuration by
>adding IP of both machines. 
>they got interconnected. 
>
>In first machine, 
>karaf@node1()> feature:install http 
>karaf@node1()> feature:install http-whiteboard 
>karaf@node1()> feature:repo-add cellar 4.0.0 
>karaf@node1()> feature:install cellar 
>karaf@node1()> cluster:feature-install default cellar-http-balancer 
>karaf@node1()> feature:install webconsole 
> karaf@node1()>http:list 
>karaf@node1()> cluster:http-list default 
>
>In second machine 
>
>karaf@node2()> feature:install http 
>karaf@node2()> feature:install http-whiteboard 
>karaf@node2()> feature:repo-add cellar 4.0.0 
>karaf@node2()> feature:install cellar 
>karaf@node2()> cluster:http-list default 
>karaf@node2()> http:list
>
>105 | KarafOsgiManager           | ServletModel-2  | Undeployed  |
>/system/console     | [/system/console/*]
>107 | InstancePlugin             | ServletModel-7  | Deployed    |
>/instance          
>| [/instance/*]
>105 | ResourceServlet            | /res            | Deployed    |
>/system/console/res | [/system/console/res/*]
>104 | GogoPlugin                 | ServletModel-4  | Deployed    |
>/gogo              
>| [/gogo/*]
>102 | FeaturesPlugin             | ServletModel-12 | Deployed    |
>/features          
>| [/features/*]
>105 | KarafOsgiManager           | ServletModel-9  | Deployed    |
>/system/console     | [/system/console/*]
>106 | CellarBalancerProxyServlet | ServletModel-14 | Failed      |
>/system/console/res | [/system/console/res/*]
>106 | CellarBalancerProxyServlet | ServletModel-15 | Failed      |
>/system/console     | [/system/console/*]
>106 | CellarBalancerProxyServlet | ServletModel-16 | Deployed    | /cxf
>              
>| [/cxf/*]
>
>I stop sync both the clustering.
>
>In first machine, i added cxf features and deployed one web service
>bundle.
>As per the documentation,
>
>if i hit the browser with below url
>localhost:8181/system/console, it should open up first machine web
>console
>from second machine
>
>But for me it is opening second machine web console itself.
>
>
>
>--
>View this message in context:
>http://karaf.922171.n3.nabble.com/Cellar-Clustering-in-karaf-is-not-working-properly-tp4047567.html
>Sent from the Karaf - Dev mailing list archive at Nabble.com.