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Reintroduce 'seed' nodes, see #2219

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* Implement the join to seed nodes process
  When a new node is started started it sends a message to all
  seed nodes and then sends join command to the one that answers
  first.
* Configuration of seed-nodes and auto-join
* New JoinSeedNodeSpec that verifies the auto join to seed nodes
* In tests seed nodes are configured by overriding seedNodes
  function, since addresses are not known before start
* Deputy nodes are the live members of the seed nodes (not sure if
  that will be the final solution, see ticket 2252
* Updated cluster.rst with latest info about deputy and seed nodes
This commit is contained in:
Patrik Nordwall 2012-06-21 10:58:35 +02:00
parent a7c8d7da10
commit 42078e7083
10 changed files with 166 additions and 45 deletions
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15
akka-cluster/src/multi-jvm/scala/akka/cluster/MultiNodeClusterSpec.scala
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@ -26,7 +26,6 @@ object MultiNodeClusterSpec {
leader-actions-interval = 200 ms
unreachable-nodes-reaper-interval = 200 ms
periodic-tasks-initial-delay = 300 ms
nr-of-deputy-nodes = 2
}
akka.test {
single-expect-default = 5 s
@ -77,10 +76,22 @@ trait MultiNodeClusterSpec extends FailureDetectorStrategy with Suite { self: Mu
throw t
}
/**
* Make it possible to override/configure seedNodes from tests without
* specifying in config. Addresses are unknown before startup time.
*/
protected def seedNodes: IndexedSeq[RoleName] = IndexedSeq.empty
/**
* The cluster node instance. Needs to be lazily created.
*/
private lazy val clusterNode = new Cluster(system.asInstanceOf[ExtendedActorSystem], failureDetector)
private lazy val clusterNode = new Cluster(system.asInstanceOf[ExtendedActorSystem], failureDetector) {
override def seedNodes: IndexedSeq[Address] = {
val testSeedNodes = MultiNodeClusterSpec.this.seedNodes
if (testSeedNodes.isEmpty) super.seedNodes
else testSeedNodes map address
}
}
/**
* Get the cluster node to use.