// Execute execudes the commands with the given arguments and returns an error,
// if any.
func (c *DemoCmd) Execute(args []string) error {
// We create a new in-memory store. All information about traces will
// eventually be stored here.
store := appdash.NewMemoryStore()
// Listen on any available TCP port locally.
l, err := net.ListenTCP("tcp", &net.TCPAddr{IP: net.IPv4(127, 0, 0, 1), Port: 0})
if err != nil {
log.Fatal(err)
}
collectorPort := l.Addr().(*net.TCPAddr).Port
log.Printf("Appdash collector listening on tcp:%d", collectorPort)
// Start an Appdash collection server that will listen for spans and
// annotations and add them to the local collector (stored in-memory).
cs := appdash.NewServer(l, appdash.NewLocalCollector(store))
cs.Debug = c.Debug // Debug logging
cs.Trace = c.Trace // Trace logging
go cs.Start()
// Print the URL at which the web UI will be running.
appdashURLStr := "http://localhost" + c.AppdashHTTPAddr
appdashURL, err := url.Parse(appdashURLStr)
if err != nil {
log.Fatalf("Error parsing http://localhost:%s: %s", c.AppdashHTTPAddr, err)
}
log.Printf("Appdash web UI running at %s", appdashURL)
// Start the web UI in a separate goroutine.
tapp := traceapp.New(nil)
tapp.Store = store
tapp.Queryer = store
go func() {
log.Fatal(http.ListenAndServe(c.AppdashHTTPAddr, tapp))
}()
// Print the URL at which the demo app is running.
demoURLStr := "http://localhost" + c.DemoHTTPAddr
demoURL, err := url.Parse(demoURLStr)
if err != nil {
log.Fatalf("Error parsing http://localhost:%s: %s", c.DemoHTTPAddr, err)
}
log.Println()
log.Printf("Appdash demo app running at %s", demoURL)
// The Appdash collection server that our demo app will use is running
// locally with our HTTP server in this case, so we set this up now.
localCollector := appdash.NewRemoteCollector(fmt.Sprintf(":%d", collectorPort))
// Handle the root path of our app.
http.Handle("/", &middlewareHandler{
middleware: httptrace.Middleware(localCollector, &httptrace.MiddlewareConfig{
RouteName: func(r *http.Request) string { return r.URL.Path },
SetContextSpan: requestSpans.setRequestSpan,
}),
next: &demoApp{collector: localCollector, baseURL: demoURL, appdashURL: appdashURL},
})
return http.ListenAndServe(c.DemoHTTPAddr, nil)
}
func main() {
// Create a recent in-memory store, evicting data after 20s.
//
// The store defines where information about traces (i.e. spans and
// annotations) will be stored during the lifetime of the application. This
// application uses a MemoryStore store wrapped by a RecentStore with an
// eviction time of 20s (i.e. all data after 20s is deleted from memory).
memStore := appdash.NewMemoryStore()
store := &appdash.RecentStore{
MinEvictAge: 20 * time.Second,
DeleteStore: memStore,
}
// Start the Appdash web UI on port 8700.
//
// This is the actual Appdash web UI -- usable as a Go package itself, We
// embed it directly into our application such that visiting the web server
// on HTTP port 8700 will bring us to the web UI, displaying information
// about this specific web-server (another alternative would be to connect
// to a centralized Appdash collection server).
url, err := url.Parse("http://localhost:8700")
if err != nil {
log.Fatal(err)
}
tapp, err := traceapp.New(nil, url)
if err != nil {
log.Fatal(err)
}
tapp.Store = store
tapp.Queryer = memStore
log.Println("Appdash web UI running on HTTP :8700")
go func() {
log.Fatal(http.ListenAndServe(":8700", tapp))
}()
// We will use a local collector (as we are running the Appdash web UI
// embedded within our app).
//
// A collector is responsible for collecting the information about traces
// (i.e. spans and annotations) and placing them into a store. In this app
// we use a local collector (we could also use a remote collector, sending
// the information to a remote Appdash collection server).
collector = appdash.NewLocalCollector(store)
// Create the appdash/httptrace middleware.
//
// Here we initialize the appdash/httptrace middleware. It is a Negroni
// compliant HTTP middleware that will generate HTTP events for Appdash to
// display. We could also instruct Appdash with events manually, if we
// wanted to.
tracemw := httptrace.Middleware(collector, &httptrace.MiddlewareConfig{
RouteName: func(r *http.Request) string { return r.URL.Path },
SetContextSpan: func(r *http.Request, spanID appdash.SpanID) {
context.Set(r, CtxSpanID, spanID)
},
})
// Setup our router (for information, see the gorilla/mux docs):
router := mux.NewRouter()
router.HandleFunc("/", Home)
router.HandleFunc("/endpoint", Endpoint)
// Setup Negroni for our app (for information, see the negroni docs):
n := negroni.Classic()
n.Use(negroni.HandlerFunc(tracemw)) // Register appdash's HTTP middleware.
n.UseHandler(router)
n.Run(":8699")
}
func main() {
// Create a default InfluxDB configuration.
conf, err := appdash.NewInfluxDBConfig()
if err != nil {
log.Fatalf("failed to create influxdb config, error: %v", err)
}
// Enable InfluxDB server HTTP basic auth.
conf.Server.HTTPD.AuthEnabled = true
conf.AdminUser = appdash.InfluxDBAdminUser{
Username: "******",
Password: "******",
}
// If you do not want metrics to be reported (see: https://docs.influxdata.com/influxdb/v0.10/administration/config/#reporting-disabled-false) uncomment the following line:
//conf.Server.ReportingDisabled = true
// Configure InfluxDB ports, if you desire:
//conf.Server.Admin.BindAddress = ":8083"
//conf.Server.BindAddress = ":8088"
//conf.Server.CollectdInputs[0].BindAddress = "" // auto-chosen
//conf.Server.GraphiteInputs[0].BindAddress = ":2003"
//conf.Server.HTTPD.BindAddress = ":8086"
//conf.Server.OpenTSDBInputs[0].BindAddress = ":4242"
//conf.Server.UDPInputs[0].BindAddress = "" // auto-chosen
// Control where InfluxDB server logs are written to, if desired:
//conf.LogOutput = ioutil.Discard
store, err := appdash.NewInfluxDBStore(conf)
if err != nil {
log.Fatalf("failed to create influxdb store, error: %v", err)
}
defer func() {
if err := store.Close(); err != nil {
log.Fatal(err)
}
}()
url, err := url.Parse("http://localhost:8700")
if err != nil {
log.Fatal(err)
}
tapp, err := traceapp.New(nil, url)
if err != nil {
log.Fatal(err)
}
tapp.Store = store
tapp.Queryer = store
tapp.Aggregator = store
log.Println("Appdash web UI running on HTTP :8700")
go func() {
log.Fatal(http.ListenAndServe(":8700", tapp))
}()
collector = appdash.NewLocalCollector(store)
tracemw := httptrace.Middleware(collector, &httptrace.MiddlewareConfig{
RouteName: func(r *http.Request) string { return r.URL.Path },
SetContextSpan: func(r *http.Request, spanID appdash.SpanID) {
context.Set(r, CtxSpanID, spanID)
},
})
router := mux.NewRouter()
router.HandleFunc("/", Home)
router.HandleFunc("/endpoint", Endpoint)
n := negroni.Classic()
n.Use(negroni.HandlerFunc(tracemw))
n.UseHandler(router)
n.Run(":8699")
}