| Configure Zookeeper zoodiscovery centralized and replicated mode [message #731954] |
Mon, 03 October 2011 10:46  |
Eclipse User |
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Greetings,
I have a problem configuring Zookeeper to work with zoodiscovery mode centralized and replicated. The guide at http://wiki.eclipse.org/Zookeeper_Based_ECF_Discovery is a little mysterious about that.
I'm working on Windows XP SP3, Java JDK 1.6, Eclipse STS 2.7.2, org.eclipse.osgi 3.7 and a proxied network.
NOTE: Using the standalone configuration mode gives no problem. I use -Dzoodiscovery.flavor.standalone=192.168.23.21:3030;clientPort=3031 on the server and -Dzoodiscovery.flavor.standalone=192.168.23.28:3031;clientPort=3030 and it works nicely.
I will split the question in multiple parts:
1) In a setup with a (one) central server on 192.168.23.28, multiple clients. The clients will both publish and consume services.
I launch the server as:
java -Dzoodiscovery.dataDir=name -Dzoodiscovery.flavor=zoodiscovery.flavor.centralized=192.168.23.28 -jar org.eclipse.osgi.jar -console -consoleLog -clean -configuration c:\temp\osgiserver\configuration
I can see the ZooDiscovery> Discovery Service Activated.
When I launch the clients (in the example there's only one) as:
java -Dzoodiscovery.autoStart=true -Dzoodiscovery.flavor=zoodiscovery.flavor.centralized=192.168.23.28 -jar org.eclipse.osgi.jar -console -consoleLog -clean -configuration c:\temp\osgiclient\configuration
I can see ZooDiscovery> Discovery Service Activated. but then INFO - Attempting connection to server: /192.168.23.28 which goes on and on never succeeding.
I have to start server and clients by configuring Zookeeper from command line, I cannot insert those parameters inside the bundles. I have tried setting the -Dzoodiscovery.clientPort=8888 on the server (8888 is available) and then -Dzoodiscovery.flavor=zoodiscovery.flavor.centralized=192.168.23.28:8888 on the client, but still it changes nothing.
How do I configure such a setup?
2) Plus I'd like to know if it's possible, using centralized, to have multiple central servers talking between them or if I'd have to use the replicated mode.
3) Which leads to.. how do I configure server and clients to use replicated mode by passing VM command line arguments?
4) In replicated mode, if I add a new Zookeeper instance later on, will I have to stop and reconfigure the existing Zookeeper instances to work with the new one or is it sufficient to configure the new one to work with the existing ones?
Thank you very much,
cheers
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| Re: Configure Zookeeper zoodiscovery centralized and replicated mode [message #733618 is a reply to message #733602] |
Wed, 05 October 2011 04:34  |
| Eclipse User |
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YES!
I knew I was missing something trivial, centralized mode works now. Thank you very much.
server launch:
java -Dzoodiscovery.autoStart=true -Dzoodiscovery.dataDir=name -Dzoodiscovery.flavor=zoodiscovery.flavor.centralized=IP -jar org.eclipse.osgi.jar -console -consoleLog -clean -configuration path
client launch:
java -Dzoodiscovery.autoStart=true -Dzoodiscovery.flavor=zoodiscovery.flavor.centralized=IP -jar org.eclipse.osgi.jar -console -consoleLog -clean -configuration path
Note:
if you do not set the ecf.exported.containerfactoryargs property in every bundle which publishes a service, the services would be discovered by the server's Zookeeper instance but then you would immediately get an UnknownHostException if the machine running the server is unable to resolve the hostname of the publishing machine
Cheers
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