| Tip |
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This tutorial and the simpleft FT module were designed by Tulio Alberton Ribeiro of the LaSIGE - Large-Scale Informatics Systems Laboratory. Thanks Tulio! |
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| Table of Contents | ||
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Using the Included
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FT Module
If you're interested in using the FT module as written and not about developing or understanding the code, you only need to complete this section. That being said, it'll probably be beneficial if you go through the entire tutorial 
.
Creating the Keystore
First thing that you need to do is generate the key used in challenge response authentication as follows:
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Running the Module
To run the SimpleFT FT module, make sure it's listed in the list of modules to load in floodlightdefault.properties, save the file, and run the controller. It's as simple as that.
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| Code Block |
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@Override
public void keysModified(Iterator<String> keys, org.sdnplatform.sync.IStoreListener.UpdateType type) {
while(keys.hasNext()){
String k = keys.next();
try {
/*
logger.debug("keysModified: Key:{}, Value:{}, Type: {}",
new Object[] {
k,
storeFT.get(k).getValue().toString(),
type.name()
}
);
*/
if(type.name().equals("REMOTE")){
String info = storeFT.get(k).getValue();
logger.debug("REMOTE: Key:{}, Value:{}", k, value);
}
} catch (SyncException e) {
e.printStackTrace();
}
}
} |
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FT Implementation Details
The FT class uses an RPCListener to monitor RPC connections among the cluster and inform all synced nodes about connected and disconnected events. The fault tolerance module defines a RPCListener and monitors its connections.
In the event a controller boots up and connects, the SimpleFT module will insert a list of its switches and their roles to the store. And upon controller disconnection events, the module gets the disconnected node's switch list from store and set all the disconnected controller's switches as MASTER.
More Information
One can follow SimpleFT Q&A threads (such as this one) in the floodlight-dev@openflowhub.org email list.
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Lastly, the Write to our email list.
The source code is located on GitHub here.