Example #1
0
// handleConnection will decode the data received and aggregates it into its
// stats
func (m *Monitor) handleConnection(conn net.Conn) {
	dec := json.NewDecoder(conn)
	nerr := 0
	for {
		measure := &SingleMeasure{}
		if err := dec.Decode(measure); err != nil {
			// if end of connection
			if err == io.EOF || strings.Contains(err.Error(), "closed") {
				break
			}
			// otherwise log it
			log.Lvl2("Error: monitor decoding from", conn.RemoteAddr().String(), ":", err)
			nerr++
			if nerr > 1 {
				log.Lvl2("Monitor: too many errors from", conn.RemoteAddr().String(), ": Abort.")
				break
			}
		}

		log.Lvlf3("Monitor: received a Measure from %s: %+v", conn.RemoteAddr().String(), measure)
		// Special case where the measurement is indicating a FINISHED step
		switch strings.ToLower(measure.Name) {
		case "end":
			log.Lvl3("Finishing monitor")
			m.done <- conn.RemoteAddr().String()
		default:
			m.measures <- measure
		}
	}
}
Example #2
0
// GenLocalHosts will create n hosts with the first one being connected to each of
// the other nodes if connect is true.
func GenLocalHosts(n int, connect bool, processMessages bool) []*Host {

	hosts := make([]*Host, n)
	for i := 0; i < n; i++ {
		host := NewLocalHost(2000 + i*10)
		hosts[i] = host
	}
	root := hosts[0]
	for _, host := range hosts {
		host.ListenAndBind()
		log.Lvlf3("Listening on %s %x", host.ServerIdentity.First(), host.ServerIdentity.ID)
		if processMessages {
			host.StartProcessMessages()
		}
		if connect && root != host {
			log.Lvl4("Connecting", host.ServerIdentity.First(), host.ServerIdentity.ID, "to",
				root.ServerIdentity.First(), root.ServerIdentity.ID)
			if _, err := host.Connect(root.ServerIdentity); err != nil {
				log.Fatal(host.ServerIdentity.Addresses, "Could not connect hosts", root.ServerIdentity.Addresses, err)
			}
			// Wait for connection accepted in root
			connected := false
			for !connected {
				time.Sleep(time.Millisecond * 10)
				root.networkLock.Lock()
				for id := range root.connections {
					if id.Equal(host.ServerIdentity.ID) {
						connected = true
						break
					}
				}
				root.networkLock.Unlock()
			}
			log.Lvl4(host.ServerIdentity.First(), "is connected to root")
		}
	}
	return hosts
}
Example #3
0
// Runs a command on the remote host and outputs an eventual error if debug level >= 3
func runSSH(host, cmd string) {
	if _, err := platform.SSHRun("", host, cmd); err != nil {
		log.Lvlf3("Host %s got error %s while running [%s]", host, err.Error(), cmd)
	}
}