func LoadApplicationConfig() *conf.Config {
cnf, dlog := conf.LoadApplicationConfig()
lg := NewLogger("conf", cnf)
defer lg.Close()
if lg.Level <= DEBUG {
// Print out the debug information from loading the configuration.
scanner := bufio.NewScanner(dlog)
for scanner.Scan() {
lg.Debugf(scanner.Text() + "\n")
}
}
return cnf
}
func main() {
for idx := range os.Args {
arg := os.Args[idx]
if strings.HasPrefix(arg, "--h") || strings.HasPrefix(arg, "-h") {
fmt.Fprintf(os.Stderr, USAGE)
os.Exit(0)
}
}
// Load the htraced configuration.
cnf, cnfLog := conf.LoadApplicationConfig("htraced.")
// Open the HTTP port.
// We want to do this first, before initializing the datastore or setting up
// logging. That way, if someone accidentally starts two daemons with the
// same config file, the second invocation will exit with a "port in use"
// error rather than potentially disrupting the first invocation.
rstListener, listenErr := net.Listen("tcp", cnf.Get(conf.HTRACE_WEB_ADDRESS))
if listenErr != nil {
fmt.Fprintf(os.Stderr, "Error opening HTTP port: %s\n",
listenErr.Error())
os.Exit(1)
}
// Print out the startup banner and information about the daemon
// configuration.
lg := common.NewLogger("main", cnf)
defer lg.Close()
lg.Infof("*** Starting htraced %s [%s]***\n", RELEASE_VERSION, GIT_VERSION)
scanner := bufio.NewScanner(cnfLog)
for scanner.Scan() {
lg.Infof(scanner.Text() + "\n")
}
common.InstallSignalHandlers(cnf)
if runtime.GOMAXPROCS(0) == 1 {
ncpu := runtime.NumCPU()
runtime.GOMAXPROCS(ncpu)
lg.Infof("setting GOMAXPROCS=%d\n", ncpu)
} else {
lg.Infof("GOMAXPROCS=%d\n", runtime.GOMAXPROCS(0))
}
lg.Infof("leveldb version=%d.%d\n",
levigo.GetLevelDBMajorVersion(), levigo.GetLevelDBMinorVersion())
// Initialize the datastore.
store, err := CreateDataStore(cnf, nil)
if err != nil {
lg.Errorf("Error creating datastore: %s\n", err.Error())
os.Exit(1)
}
var rsv *RestServer
rsv, err = CreateRestServer(cnf, store, rstListener)
if err != nil {
lg.Errorf("Error creating REST server: %s\n", err.Error())
os.Exit(1)
}
var hsv *HrpcServer
if cnf.Get(conf.HTRACE_HRPC_ADDRESS) != "" {
hsv, err = CreateHrpcServer(cnf, store, nil)
if err != nil {
lg.Errorf("Error creating HRPC server: %s\n", err.Error())
os.Exit(1)
}
} else {
lg.Infof("Not starting HRPC server because no value was given for %s.\n",
conf.HTRACE_HRPC_ADDRESS)
}
naddr := cnf.Get(conf.HTRACE_STARTUP_NOTIFICATION_ADDRESS)
if naddr != "" {
notif := StartupNotification{
HttpAddr: rsv.Addr().String(),
ProcessId: os.Getpid(),
}
if hsv != nil {
notif.HrpcAddr = hsv.Addr().String()
}
err = sendStartupNotification(naddr, ¬if)
if err != nil {
fmt.Fprintf(os.Stderr, "Failed to send startup notification: "+
"%s\n", err.Error())
os.Exit(1)
}
}
for {
time.Sleep(time.Duration(10) * time.Hour)
}
}
func main() {
// Load htraced configuration
cnf, cnfLog := conf.LoadApplicationConfig("htrace.tool.")
lg := common.NewLogger("conf", cnf)
defer lg.Close()
scanner := bufio.NewScanner(cnfLog)
for scanner.Scan() {
lg.Debugf(scanner.Text() + "\n")
}
// Parse argv
app := kingpin.New(os.Args[0], USAGE)
app.Flag("Dmy.key", "Set configuration key 'my.key' to 'my.value'. Replace 'my.key' "+
"with any key you want to set.").Default("my.value").String()
addr := app.Flag("addr", "Server address.").String()
verbose = *app.Flag("verbose", "Verbose.").Default("false").Bool()
version := app.Command("version", "Print the version of this program.")
serverVersion := app.Command("serverVersion", "Print the version of the htraced server.")
serverStats := app.Command("serverStats", "Print statistics retrieved from the htraced server.")
serverStatsJson := serverStats.Flag("json", "Display statistics as raw JSON.").Default("false").Bool()
serverDebugInfo := app.Command("serverDebugInfo", "Print the debug info of the htraced server.")
serverConf := app.Command("serverConf", "Print the server configuration retrieved from the htraced server.")
findSpan := app.Command("findSpan", "Print information about a trace span with a given ID.")
findSpanId := findSpan.Arg("id", "Span ID to find. Example: be305e54-4534-2110-a0b2-e06b9effe112").Required().String()
findChildren := app.Command("findChildren", "Print out the span IDs that are children of a given span ID.")
parentSpanId := findChildren.Arg("id", "Span ID to print children for. Example: be305e54-4534-2110-a0b2-e06b9effe112").
Required().String()
childLim := findChildren.Flag("lim", "Maximum number of child IDs to print.").Default("20").Int()
loadFile := app.Command("loadFile", "Write whitespace-separated JSON spans from a file to the server.")
loadFilePath := loadFile.Arg("path",
"A file containing whitespace-separated span JSON.").Required().String()
loadJson := app.Command("load", "Write JSON spans from the command-line to the server.")
loadJsonArg := loadJson.Arg("json", "A JSON span to write to the server.").Required().String()
dumpAll := app.Command("dumpAll", "Dump all spans from the htraced daemon.")
dumpAllOutPath := dumpAll.Arg("path", "The path to dump the trace spans to.").Default("-").String()
dumpAllLim := dumpAll.Flag("lim", "The number of spans to transfer from the server at once.").
Default("100").Int()
graph := app.Command("graph", "Visualize span JSON as a graph.")
graphJsonFile := graph.Arg("input", "The JSON file to load").Required().String()
graphDotFile := graph.Flag("output",
"The path to write a GraphViz dotfile to. This file can be used as input to "+
"GraphViz, in order to generate a pretty picture. See graphviz.org for more "+
"information about generating pictures of graphs.").Default("-").String()
query := app.Command("query", "Send a query to htraced.")
queryLim := query.Flag("lim", "Maximum number of spans to retrieve.").Default("20").Int()
queryArg := query.Arg("query", "The query string to send. Query strings have the format "+
"[TYPE] [OPERATOR] [CONST], joined by AND statements.").Required().String()
rawQuery := app.Command("rawQuery", "Send a raw JSON query to htraced.")
rawQueryArg := rawQuery.Arg("json", "The query JSON to send.").Required().String()
cmd := kingpin.MustParse(app.Parse(os.Args[1:]))
// Add the command-line settings into the configuration.
if *addr != "" {
cnf = cnf.Clone(conf.HTRACE_WEB_ADDRESS, *addr)
}
// Handle commands that don't require an HTrace client.
switch cmd {
case version.FullCommand():
os.Exit(printVersion())
case graph.FullCommand():
err := jsonSpanFileToDotFile(*graphJsonFile, *graphDotFile)
if err != nil {
fmt.Printf("graphing error: %s\n", err.Error())
os.Exit(EXIT_FAILURE)
}
os.Exit(EXIT_SUCCESS)
}
// Create HTrace client
hcl, err := htrace.NewClient(cnf, nil)
if err != nil {
fmt.Printf("Failed to create HTrace client: %s\n", err.Error())
os.Exit(EXIT_FAILURE)
}
// Handle commands that require an HTrace client.
switch cmd {
case version.FullCommand():
os.Exit(printVersion())
case serverVersion.FullCommand():
os.Exit(printServerVersion(hcl))
case serverStats.FullCommand():
if *serverStatsJson {
os.Exit(printServerStatsJson(hcl))
} else {
os.Exit(printServerStats(hcl))
}
case serverDebugInfo.FullCommand():
os.Exit(printServerDebugInfo(hcl))
case serverConf.FullCommand():
os.Exit(printServerConfJson(hcl))
case findSpan.FullCommand():
var id *common.SpanId
id.FromString(*findSpanId)
os.Exit(doFindSpan(hcl, *id))
case findChildren.FullCommand():
var id *common.SpanId
id.FromString(*parentSpanId)
os.Exit(doFindChildren(hcl, *id, *childLim))
case loadJson.FullCommand():
os.Exit(doLoadSpanJson(hcl, *loadJsonArg))
case loadFile.FullCommand():
os.Exit(doLoadSpanJsonFile(hcl, *loadFilePath))
case dumpAll.FullCommand():
err := doDumpAll(hcl, *dumpAllOutPath, *dumpAllLim)
if err != nil {
fmt.Printf("dumpAll error: %s\n", err.Error())
os.Exit(EXIT_FAILURE)
}
os.Exit(EXIT_SUCCESS)
case query.FullCommand():
err := doQueryFromString(hcl, *queryArg, *queryLim)
if err != nil {
fmt.Printf("query error: %s\n", err.Error())
os.Exit(EXIT_FAILURE)
}
os.Exit(EXIT_SUCCESS)
case rawQuery.FullCommand():
err := doRawQuery(hcl, *rawQueryArg)
if err != nil {
fmt.Printf("raw query error: %s\n", err.Error())
os.Exit(EXIT_FAILURE)
}
os.Exit(EXIT_SUCCESS)
}
app.UsageErrorf(os.Stderr, "You must supply a command to run.")
}