func NewVarzMessage(name string, instrumentables []Instrumentable) (*VarzMessage, error) {
contexts := make([]Context, len(instrumentables))
for i, instrumentable := range instrumentables {
contexts[i] = instrumentable.Emit()
}
memStats := new(runtime.MemStats)
runtime.ReadMemStats(memStats)
ip, err := localip.LocalIP()
if err != nil {
return &VarzMessage{}, err
}
tags := map[string]string{
"ip": ip,
}
return &VarzMessage{name, runtime.NumCPU(), runtime.NumGoroutine(), mapMemStats(memStats), tags, contexts}, nil
}
func Fetch() {
for {
t := time.Now()
ip, err := localip.LocalIP()
if err != nil {
panic(err)
}
url := "http://*****:*****@" + ip + ":7879/varz"
resp, err := http.Get(url)
if err != nil {
panic(err)
}
if verbose {
fmt.Printf("FETCHING METRICS TOOK: %s\n", time.Since(t))
}
resp.Body.Close()
time.Sleep(collectorFetchInterval * time.Second)
}
}
)
var _ = Describe("Serving Metrics", func() {
var (
a appfixture.AppFixture
ip string
)
BeforeEach(func() {
a = appfixture.NewAppFixture()
simulator.SetDesiredState(a.DesiredState(2))
simulator.SetCurrentHeartbeats(a.Heartbeat(1))
var err error
ip, err = localip.LocalIP()
Ω(err).ShouldNot(HaveOccurred())
})
AfterEach(func() {
cliRunner.StopMetricsServer()
})
It("should register with the collector", func(done Done) {
cliRunner.StartMetricsServer(simulator.currentTimestamp)
guid := models.Guid()
coordinator.MessageBus.Subscribe(guid, func(message *yagnats.Message) {
Ω(string(message.Payload)).Should(ContainSubstring("%s:%d", ip, coordinator.MetricsServerPort))
Ω(string(message.Payload)).Should(ContainSubstring(`"bob","password"`))
close(done)