func main() {
flag.Parse()
if *masterHostPort == "" && *port == 0 {
// If masterHostPort string is empty, then this node is the master.
*port = defaultMasterPort
}
// Create and start the paxos server
var paxosBackend backend.Backend
if *testing {
paxosBackend = backend.NewStub()
} else {
paxosBackend, _ = backend.NewJeopardyServer()
}
var debug paxosrpc.Debug
if *debugArgs == "none" {
debug = paxosrpc.NONE
} else if *debugArgs == "dropstart" {
debug = paxosrpc.DROPSTART
} else {
debug = paxosrpc.DROPODD
}
_, err := paxos.NewPaxos(*masterHostPort, *numNodes, "localhost:"+strconv.Itoa(*port), *nodeID, *masterID, paxosBackend, debug)
if err != nil {
log.Fatalln("Failed to create Paxos node:", err)
}
// Run the node forever.
select {}
}
func testPaxosReplaceNode() {
t.send(10, master)
for i := 0; i < (*numNodes-1)*10; i++ { //All but the dead node reply
<-t.messages
}
reply := new(paxosrpc.GetServerReply)
master.Call("Paxos.GetServers", new(paxosrpc.GetServerArgs), reply)
nodes := (*reply).Nodes
hostPort := "localhost:" + strconv.Itoa(10000+(rand.Int()%10000))
stub := backend.NewStub()
_, err := paxos.NewPaxos(nodes[0].HostPort, *numNodes, hostPort, uint64(*numNodes), 0, stub, paxosrpc.NONE)
if err != nil {
log.Println(err)
}
var replaceNode paxosrpc.Node
for _, node := range nodes {
if node.NodeID == 2 { //Again, we always assume 2 is killed..this is dependent on paxostest.sh
replaceNode = node
}
}
args := &paxosrpc.QuiesceArgs{nodes[0], replaceNode, paxosrpc.Node{hostPort, uint64(*numNodes)}}
for _, node := range nodes {
if node.NodeID != 2 {
conn, err := rpc.DialHTTP("tcp", node.HostPort)
if err != nil {
log.Println(err)
}
conn.Call("Paxos.Quiesce", args, new(paxosrpc.QuiesceReply))
}
}
for i := 0; i < 10; i++ {
<-t.messages
}
master.Call("Paxos.GetServers", new(paxosrpc.GetServerArgs), reply)
nodes = (*reply).Nodes
for _, node := range nodes {
conn, err := rpc.DialHTTP("tcp", node.HostPort)
if err != nil {
log.Println(err)
}
conn.Call("Paxos.Resume", new(paxosrpc.ResumeArgs), new(paxosrpc.ResumeReply))
}
t.sendAndListen(20)
}
