// Add a master node
func addMaster(netplugin *plugin.NetPlugin, srvInfo core.ServiceInfo) error {
// save it in db
masterDB[masterKey(srvInfo)] = &srvInfo
// tell the plugin about the master
return netplugin.AddMaster(srvInfo)
}
// Main loop to discover peer hosts and masters
func peerDiscoveryLoop(netplugin *plugin.NetPlugin, objdbClient objdb.ObjdbApi) {
// Create channels for watch thread
nodeEventCh := make(chan objdb.WatchServiceEvent, 1)
watchStopCh := make(chan bool, 1)
masterEventCh := make(chan objdb.WatchServiceEvent, 1)
masterWatchStopCh := make(chan bool, 1)
// Get the local address
localIP, err := objdbClient.GetLocalAddr()
if err != nil {
log.Fatalf("Error getting locla IP address. Err: %v", err)
}
// Start a watch on netplugin service so that we dont miss any
err = objdbClient.WatchService("netplugin", nodeEventCh, watchStopCh)
if err != nil {
log.Fatalf("Could not start a watch on netplugin service. Err: %v", err)
}
// Start a watch on netmaster too
err = objdbClient.WatchService("netmaster", masterEventCh, masterWatchStopCh)
if err != nil {
log.Fatalf("Could not start a watch on netmaster service. Err: %v", err)
}
// Get a list of all existing netplugin nodes
nodeList, err := objdbClient.GetService("netplugin")
if err != nil {
log.Errorf("Error getting node list from objdb. Err: %v", err)
}
log.Infof("Got netplugin service list: %+v", nodeList)
// walk each node and add it as a PeerHost
for _, node := range nodeList {
// Ignore if its our own info
if node.HostAddr == localIP {
continue
}
// add the node
err := netplugin.AddPeerHost(core.ServiceInfo{
HostAddr: node.HostAddr,
Port: ofnet.OFNET_AGENT_PORT,
})
if err != nil {
log.Errorf("Error adding node {%+v}. Err: %v", node, err)
}
}
// Get a list of all existing netmasters
masterList, err := objdbClient.GetService("netmaster")
if err != nil {
log.Errorf("Error getting master list from objdb. Err: %v", err)
}
log.Infof("Got netmaster service list: %+v", masterList)
// Walk each master and add it
for _, master := range masterList {
// Add the master
err := netplugin.AddMaster(core.ServiceInfo{
HostAddr: master.HostAddr,
Port: ofnet.OFNET_MASTER_PORT,
})
if err != nil {
log.Errorf("Error adding master {%+v}. Err: %v", master, err)
}
}
for {
select {
case srvEvent := <-nodeEventCh:
log.Infof("Received netplugin service watch event: %+v", srvEvent)
// collect the info about the node
nodeInfo := srvEvent.ServiceInfo
// check if its our on info coming back to us
if nodeInfo.HostAddr == localIP {
break
}
// Handle based on event type
if srvEvent.EventType == objdb.WatchServiceEventAdd {
log.Infof("Node add event for {%+v}", nodeInfo)
// add the node
err := netplugin.AddPeerHost(core.ServiceInfo{
HostAddr: nodeInfo.HostAddr,
Port: ofnet.OFNET_AGENT_PORT,
})
if err != nil {
log.Errorf("Error adding node {%+v}. Err: %v", nodeInfo, err)
}
} else if srvEvent.EventType == objdb.WatchServiceEventDel {
log.Infof("Node delete event for {%+v}", nodeInfo)
// remove the node
err := netplugin.DeletePeerHost(core.ServiceInfo{
HostAddr: nodeInfo.HostAddr,
Port: ofnet.OFNET_AGENT_PORT,
})
if err != nil {
log.Errorf("Error adding node {%+v}. Err: %v", nodeInfo, err)
}
}
case srvEvent := <-masterEventCh:
log.Infof("Received netmaster service watch event: %+v", srvEvent)
// collect the info about the node
nodeInfo := srvEvent.ServiceInfo
// Handle based on event type
if srvEvent.EventType == objdb.WatchServiceEventAdd {
log.Infof("Master add event for {%+v}", nodeInfo)
// Add the master
err := netplugin.AddMaster(core.ServiceInfo{
HostAddr: nodeInfo.HostAddr,
Port: ofnet.OFNET_MASTER_PORT,
})
if err != nil {
log.Errorf("Error adding master {%+v}. Err: %v", nodeInfo, err)
}
} else if srvEvent.EventType == objdb.WatchServiceEventDel {
log.Infof("Master delete event for {%+v}", nodeInfo)
// Delete the master
err := netplugin.DeleteMaster(core.ServiceInfo{
HostAddr: nodeInfo.HostAddr,
Port: nodeInfo.Port,
})
if err != nil {
log.Errorf("Error deletin master {%+v}. Err: %v", nodeInfo, err)
}
}
}
}
}