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doTest = function( signal ) {
// Test basic replica set functionality.
// -- Replication
// -- Failover
// Replica set testing API
// Create a new replica set test. Specify set name and the number of nodes you want.
var replTest = new ReplSetTest( {name: 'testSet', nodes: 3} );
// call startSet() to start each mongod in the replica set
// this returns a list of nodes
var nodes = replTest.startSet();
// Call initiate() to send the replSetInitiate command
// This will wait for initiation
replTest.initiate();
// Call getMaster to return a reference to the node that's been
// elected master.
var master = replTest.getMaster();
// Calling getMaster also makes available the liveNodes structure,
// which looks like this:
// liveNodes = {master: masterNode,
// slaves: [slave1, slave2]
// }
printjson(replTest.liveNodes);
// Here's how you save something to master
master.getDB("foo").foo.save({a: 1000});
// This method will check the oplogs of the master
// and slaves in the set and wait until the change has replicated.
replTest.awaitReplication();
// Here's how to stop the master node
var master_id = replTest.getNodeId( master );
replTest.stop( master_id );
// Now let's see who the new master is:
var new_master = replTest.getMaster();
// Is the new master the same as the old master?
var new_master_id = replTest.getNodeId( new_master );
assert( master_id != new_master_id, "Old master shouldn't be equal to new master." );
// Here's how to restart a node:
replTest.start( master_id, {}, true );
// Shut down the set and finish the test.
replTest.stopSet( signal );
}
doTest( 15 );
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