func main() {
s, err := g2s.Dial("udp", "54.200.145.61:8125")
if err != nil {
return
}
s.Counter(1.0, "test.g2s", 1)
}
// setup connections to other services running on this host
func setupServices() {
var error error
services.Statsd, error = g2s.Dial("udp", "localhost:8125")
if error != nil {
log.Fatal("could not set up statsd client.")
}
services.Memcached = memcache.New("localhost:11211")
// setup push service
usingSandbox := "true" // true or false
uniqushResponse, uniqushError := http.PostForm("http://localhost:9898/addpsp", url.Values{
"pushservicetype": {"apns"},
"service": {"newspeak"},
"cert": {"/etc/newspeak/apns-certs/cert.pem"},
"key": {"/etc/newspeak/apns-certs/priv-noenc.pem"},
"sandbox": {usingSandbox},
})
if uniqushError != nil {
log.Fatal("could not add push service provider for apple push notifications: " + string(uniqushError.Error()))
} else {
uniqushResponseBodyBytes, uniqushError := ioutil.ReadAll(uniqushResponse.Body)
uniqushResponseBody := string(uniqushResponseBodyBytes)
uniqushResponse.Body.Close()
if uniqushError != nil {
log.Fatal("could not read response when adding push service provider for apple push notifications: " + string(uniqushError.Error()))
} else if uniqushResponseBody[0:30] != "[AddPushServiceProvider][Info]" {
log.Fatal("invalid response when adding push service provider for apple push notifications: " + uniqushResponseBody)
} else {
fmt.Println("added push service provider for apple push notifications. usingSandbox:" + usingSandbox + ", uniqush response:" + uniqushResponseBody)
}
}
}
func main() {
// Parse command line arguments
var (
config_file = flag.String("config", "", "Path to configuration file")
)
flag.Parse()
// Load configuration into package variable Config
config_error := gcfg.ReadFileInto(&Config, *config_file)
if config_error != nil {
log.Fatal("Could not load config file: " + config_error.Error())
}
// Instantiate StatsD connection
if Config.Statsd.Host == "" {
StatsD = g2s.Noop()
} else {
StatsD, _ = g2s.Dial(Config.Statsd.Protocol, Config.Statsd.Host+":"+Config.Statsd.Port)
}
// Log startup
log.Println("go-airbrake-proxy started")
// Fire up an HTTP server and handle it
http.HandleFunc("/", httpHandler)
http.ListenAndServe(Config.Listen.Host+":"+Config.Listen.Port, nil)
}
func Dial(proto, addr string) *Statsd {
st, err := g2s.Dial(proto, addr)
if err != nil {
log.Printf("Couldn't initiate statsd with address: '%s'", addr)
return nil
}
return &Statsd{st}
}
func loadStatsd(addr string) g2s.Statter {
s, err := g2s.Dial("udp", addr)
if err != nil {
log.Warnf("Error initialising statsd connection to %v", addr)
return nil
}
return s
}
func (s *StatsD) CreateClient() {
if s.Enabled && s.Client == nil {
log.Println("StatsD is enabled")
client, err := g2s.Dial("udp", s.Host)
if err != nil {
log.Fatalf("Cannot connect to statsd server %v: %v ", s.Host, err)
}
s.Client = client
}
}
func init() {
addr := DEFAULT_STATSD_HOST
if env := os.Getenv(ENV_STATSD); env != "" {
addr = env
}
s, err := g2s.Dial("udp", addr)
if err != nil {
log.Critical(err)
os.Exit(-1)
}
_statter = s
}
func main() {
configtoml := flag.String("f", "moxy.toml", "Path to config. (default moxy.toml)")
flag.Parse()
file, err := ioutil.ReadFile(*configtoml)
if err != nil {
log.Fatal(err)
}
err = toml.Unmarshal(file, &config)
if err != nil {
log.Fatal("Problem parsing config: ", err)
}
if config.Statsd != "" {
statsd, _ = g2s.Dial("udp", config.Statsd)
}
moxystats := stats.New()
mux := http.NewServeMux()
mux.HandleFunc("/moxy_callback", moxy_callback)
mux.HandleFunc("/moxy_apps", moxy_apps)
mux.HandleFunc("/moxy_stats", func(w http.ResponseWriter, req *http.Request) {
if config.Xproxy != "" {
w.Header().Add("X-Proxy", config.Xproxy)
}
stats := moxystats.Data()
b, _ := json.MarshalIndent(stats, "", " ")
w.Write(b)
return
})
mux.HandleFunc("/", moxy_proxy)
// In case we want to log req/resp.
//trace, _ := trace.New(redirect, os.Stdout)
handler := moxystats.Handler(mux)
s := &http.Server{
Addr: ":" + config.Port,
Handler: handler,
}
callbackworker()
callbackqueue <- true
if config.TLS {
log.Println("Starting moxy tls on :" + config.Port)
err := s.ListenAndServeTLS(config.Cert, config.Key)
if err != nil {
log.Fatal(err)
}
} else {
log.Println("Starting moxy on :" + config.Port)
err := s.ListenAndServe()
if err != nil {
log.Fatal(err)
}
}
}
func loadStatsd(addr string) g2s.Statter {
disabled := config.AtPath("hailo", "service", "instrumentation", "statsd", "disabled").AsBool()
if disabled {
return g2s.Noop()
}
s, err := g2s.Dial("udp", addr)
if err != nil {
log.Warnf("Error initialising statsd connection to %v", addr)
return nil
}
return s
}
func init() {
addr := DEFAULT_STATSD_HOST
if env := os.Getenv(ENV_STATSD); env != "" {
addr = env
}
s, err := g2s.Dial("udp", addr)
if err != nil {
println(err)
os.Exit(-1)
}
_statter = s
go pprof_task()
}
func BenchmarkG2s(b *testing.B) {
s := newServer()
c, err := g2s.Dial("udp", addr)
if err != nil {
b.Fatal(err)
}
b.StartTimer()
for i := 0; i < b.N; i++ {
c.Counter(1, counterKey, 1)
c.Gauge(1, gaugeKey, strconv.Itoa(gaugeValue))
c.Timing(1, timingKey, tValDur)
}
b.StopTimer()
s.Close()
}
func init() {
addr := DEFAULT_STATSD_HOST
if env := os.Getenv(ENV_STATSD); env != "" {
addr = env
}
s, err := g2s.Dial("udp", addr)
if err == nil {
_statter = s
} else {
_statter = g2s.Noop()
log.Println(err)
}
go pprof_task()
}
func setupStatsd() (g2s.Statter, error) {
if config.Statsd.Addr == "" {
return g2s.Noop(), nil
}
if config.Statsd.Namespace == "" {
hostname, _ := os.Hostname()
config.Statsd.Namespace = "nixy." + hostname
}
if config.Statsd.SampleRate < 1 || config.Statsd.SampleRate > 100 {
config.Statsd.SampleRate = 100
}
return g2s.Dial("udp", config.Statsd.Addr)
}
func main() {
configtoml := flag.String("f", "nixy.toml", "Path to config. (default nixy.toml)")
version := flag.Bool("v", false, "prints current nixy version")
flag.Parse()
if *version {
fmt.Println(VERSION)
os.Exit(0)
}
file, err := ioutil.ReadFile(*configtoml)
if err != nil {
log.Fatal(err)
}
err = toml.Unmarshal(file, &config)
if err != nil {
log.Fatal("Problem parsing config: ", err)
}
if config.Statsd != "" {
statsd, _ = g2s.Dial("udp", config.Statsd)
}
nixystats := stats.New()
//mux := http.NewServeMux()
mux := mux.NewRouter()
mux.HandleFunc("/", nixy_version)
mux.HandleFunc("/v1/reload", nixy_reload)
mux.HandleFunc("/v1/apps", nixy_apps)
mux.HandleFunc("/v1/health", nixy_health)
mux.HandleFunc("/v1/stats", func(w http.ResponseWriter, req *http.Request) {
stats := nixystats.Data()
b, _ := json.MarshalIndent(stats, "", " ")
w.Write(b)
return
})
handler := nixystats.Handler(mux)
s := &http.Server{
Addr: ":" + config.Port,
Handler: handler,
}
eventStream()
eventWorker()
log.Println("Starting nixy on :" + config.Port)
err = s.ListenAndServe()
if err != nil {
log.Fatal(err)
}
}
func ExamplePanel_stats() {
// This example demonstrates how to push circuit breaker stats to statsd via a Panel.
// This example uses g2s. Anything conforming to the Statter interface can be used.
s, err := g2s.Dial("udp", "statsd-server:8125")
if err != nil {
log.Fatal(err)
}
breaker := NewThresholdBreaker(10)
panel := NewPanel()
panel.Statter = s
panel.StatsPrefixf = "sys.production"
panel.Add("x", breaker)
breaker.Trip() // sys.production.circuit.x.tripped
breaker.Reset() // sys.production.circuit.x.reset, sys.production.circuit.x.trip-time
breaker.Fail() // sys.production.circuit.x.fail
breaker.Ready() // sys.production.circuit.x.ready (if it's tripped and ready to retry)
}
func main() {
var conf Config
fn := Nop
confpath := flag.String("conf", "servers.json", "")
flag.Parse()
file, _ := ioutil.ReadFile(*confpath)
json.Unmarshal(file, &conf)
if conf.Statsd != "" {
e, _ := g2s.Dial("udp", conf.Statsd)
fn = (&Statsd{e}).Report
}
NewYardstick(conf.Listen, conf.Peers, fn).Run()
<-make(chan struct{})
}
func main() {
configtoml := flag.String("f", "nixy.toml", "Path to config. (default nixy.toml)")
version := flag.Bool("v", false, "prints current nixy version")
flag.Parse()
if *version {
fmt.Println(VERSION)
os.Exit(0)
}
file, err := ioutil.ReadFile(*configtoml)
if err != nil {
log.Fatal(err)
}
err = toml.Unmarshal(file, &config)
if err != nil {
log.Fatal("Problem parsing config: ", err)
}
if config.Statsd != "" {
statsd, _ = g2s.Dial("udp", config.Statsd)
}
mux := mux.NewRouter()
mux.HandleFunc("/", nixy_version)
mux.HandleFunc("/v1/reload", nixy_reload)
mux.HandleFunc("/v1/config", nixy_config)
mux.HandleFunc("/v1/health", nixy_health)
s := &http.Server{
Addr: ":" + config.Port,
Handler: mux,
}
endpoint = config.Marathon[0] // lets start with the first node.
endpointHealth()
eventStream()
eventWorker()
log.Println("Starting nixy on :" + config.Port)
err = s.ListenAndServe()
if err != nil {
log.Fatal(err)
}
}
func runCollector() {
for !flag.Parsed() {
// Defer execution of this goroutine.
runtime.Gosched()
// Add an initial delay while the program initializes to avoid attempting to collect
// metrics prior to our flags being available / parsed.
time.Sleep(1 * time.Second)
}
s, err := g2s.Dial("udp", *statsd)
if err != nil {
panic(fmt.Sprintf("Unable to connect to Statsd on %s - %s", *statsd, err))
}
if *prefix == "<detect-hostname>" {
hn, err := os.Hostname()
if err != nil {
*prefix = "go.unknown"
} else {
*prefix = "go." + hn
}
}
*prefix += "."
gaugeFunc := func(key string, val uint64) {
s.Gauge(1.0, *prefix+key, strconv.FormatUint(val, 10))
}
c := collector.New(gaugeFunc)
c.PauseDur = time.Duration(*pause) * time.Second
c.EnableCPU = *cpu
c.EnableMem = *mem
c.EnableGC = *gc
c.Run()
}
// Instanciate a new Backend that will send data to a statsd instance
func NewStatsdBackend(host, port, protocol, prefix string) (Backend, error) {
if host == "" {
return nil, fmt.Errorf("Statsd host cannot be empty")
}
if port == "" {
port = "8125"
}
if protocol == "" {
protocol = "udp"
}
if prefix == "" {
prefix = "checks."
}
statsd, err := g2s.Dial(protocol, net.JoinHostPort(host, port))
if err != nil {
return nil, err
}
return &statsdBackend{statsd: statsd, prefix: prefix}, nil
}
func main() {
var (
redisInstances = flag.String("redis.instances", "", "Semicolon-separated list of comma-separated lists of Redis instances")
redisConnectTimeout = flag.Duration("redis.connect.timeout", 3*time.Second, "Redis connect timeout")
redisReadTimeout = flag.Duration("redis.read.timeout", 3*time.Second, "Redis read timeout")
redisWriteTimeout = flag.Duration("redis.write.timeout", 3*time.Second, "Redis write timeout")
redisMCPI = flag.Int("redis.mcpi", 2, "Max connections per Redis instance")
redisHash = flag.String("redis.hash", "murmur3", "Redis hash function: murmur3, fnv, fnva")
maxSize = flag.Int("max.size", 10000, "Maximum number of events per key")
batchSize = flag.Int("batch.size", 100, "keys to select per request")
maxKeysPerSecond = flag.Int64("max.keys.per.second", 1000, "max keys per second to walk")
scanLogInterval = flag.Duration("scan.log.interval", 5*time.Second, "how often to report scan rates in log")
once = flag.Bool("once", false, "walk entire keyspace once and exit (default false, walk forever)")
statsdAddress = flag.String("statsd.address", "", "Statsd address (blank to disable)")
statsdSampleRate = flag.Float64("statsd.sample.rate", 0.1, "Statsd sample rate for normal metrics")
statsdBucketPrefix = flag.String("statsd.bucket.prefix", "myservice.", "Statsd bucket key prefix, including trailing period")
httpAddress = flag.String("http.address", ":6060", "HTTP listen address (profiling endpoints only)")
)
flag.Parse()
log.SetFlags(log.Lmicroseconds)
// Validate integer arguments.
if *maxKeysPerSecond < int64(*batchSize) {
log.Fatal("max keys per second should be bigger than batch size")
}
// Set up statsd instrumentation, if it's specified.
stats := g2s.Noop()
if *statsdAddress != "" {
var err error
stats, err = g2s.Dial("udp", *statsdAddress)
if err != nil {
log.Fatal(err)
}
}
instr := statsd.New(stats, float32(*statsdSampleRate), *statsdBucketPrefix)
// Parse hash function.
var hashFunc func(string) uint32
switch strings.ToLower(*redisHash) {
case "murmur3":
hashFunc = pool.Murmur3
case "fnv":
hashFunc = pool.FNV
case "fnva":
hashFunc = pool.FNVa
default:
log.Fatalf("unknown hash '%s'", *redisHash)
}
// Set up the clusters.
clusters, err := makeClusters(
*redisInstances,
*redisConnectTimeout, *redisReadTimeout, *redisWriteTimeout,
*redisMCPI,
hashFunc,
*maxSize,
instr,
)
if err != nil {
log.Fatal(err)
}
// HTTP server for profiling
go func() { log.Print(http.ListenAndServe(*httpAddress, nil)) }()
// Set up our rate limiter. Remember: it's per-key, not per-request.
freq := time.Duration(1/(*maxKeysPerSecond)) * time.Second
bucket := tb.NewBucket(*maxKeysPerSecond, freq)
// Build the farm
readStrategy := farm.SendAllReadAll
repairStrategy := farm.AllRepairs // blocking
dst := farm.New(clusters, len(clusters), readStrategy, repairStrategy, instr)
// Perform the walk
begin := time.Now()
for {
src := scan(clusters, *batchSize, *scanLogInterval) // new key set
walkOnce(dst, bucket, src, *maxSize, instr)
if *once {
break
}
}
log.Printf("walk complete in %s", time.Since(begin))
}
func main() {
flag.Parse()
if *verbose {
log.Printf("%v -> %v\n", *localAddr, *remoteAddr)
}
addr, err := net.ResolveTCPAddr("tcp", *localAddr)
if err != nil {
log.Fatal("cannot resolve local address: ", err)
}
rAddr, err := net.ResolveTCPAddr("tcp", *remoteAddr)
if err != nil {
log.Fatal("cannot resolve remote address: ", err)
}
cb := circuit.NewRateBreaker(*threshold, *minSamples)
events := cb.Subscribe()
if *statsdHost != "" && *metricBase != "" && *metricName != "" {
log.Println("logging to statsd")
s, err := g2s.Dial("udp", *statsdHost)
if err != nil {
log.Fatal(err)
}
panel := circuit.NewPanel()
panel.StatsPrefixf = *metricBase + ".%s"
panel.Statter = s
panel.Add(*metricName, cb)
}
if *verbose {
go func() {
for {
e := <-events
switch e {
case circuit.BreakerTripped:
log.Println("breaker tripped")
case circuit.BreakerReset:
log.Println("breaker reset")
case circuit.BreakerFail:
log.Println("breaker fail")
case circuit.BreakerReady:
log.Println("breaker ready")
}
}
}()
}
listener, err := net.ListenTCP("tcp", addr)
if err != nil {
log.Fatal("cannot bind to local port: ", err)
}
pending, complete := make(chan *net.TCPConn), make(chan *net.TCPConn)
for i := 0; i < 5; i++ {
go handleConn(pending, complete, rAddr, cb)
}
go closeConn(complete)
for {
conn, err := listener.AcceptTCP()
if err != nil {
log.Fatal("error starting listener: ", err)
}
pending <- conn
}
}
if uniqushError != nil {
log.Fatal("could not read response when adding push service provider for apple push notifications: " + string(uniqushError.Error()))
} else if uniqushResponseBody[0:30] != "[AddPushServiceProvider][Info]" {
log.Fatal("invalid response when adding push service provider for apple push notifications: " + uniqushResponseBody)
} else {
fmt.Println("added push service provider for apple push notifications. usingSandbox:" + usingSandbox + ", uniqush response:" + uniqushResponseBody)
}
}
}
// print detailed stats about the request to the log and push stats data to graphite.
// runs as separate goroutine, based on falcore.request.go:Trace()
// falcore docs say this is a big hit on performance and should only be used for debugging or development.
var completionCallback = func(falcoreRequest *falcore.Request, response *http.Response) {
go func() {
Statsd, statsdError := g2s.Dial("udp", "localhost:8125")
requestTimeDiff := falcore.TimeDiff(falcoreRequest.StartTime, falcoreRequest.EndTime)
httpRequest := falcoreRequest.HttpRequest
// stats for the whole request
falcore.Trace("%s [%s] %s%s S=%v Sig=%s Tot=%.4fs", falcoreRequest.ID, httpRequest.Method, httpRequest.Host, httpRequest.URL, response.StatusCode, falcoreRequest.Signature(), requestTimeDiff)
if statsdError == nil {
Statsd.Timing(1.0, "api.request-time", falcoreRequest.EndTime.Sub(falcoreRequest.StartTime))
}
// stats for each pipeline stage
stages := falcoreRequest.PipelineStageStats
for stage := stages.Front(); stage != nil; stage = stage.Next() {
pipelineStageStats, _ := stage.Value.(*falcore.PipelineStageStat)
stageTimeDiff := falcore.TimeDiff(pipelineStageStats.StartTime, pipelineStageStats.EndTime)
func main() {
flag.Parse()
if *verbose {
log.Printf("%v -> %v\n", *localAddr, *remoteAddr)
}
addr, err := net.ResolveTCPAddr("tcp", *localAddr)
if err != nil {
log.Fatal("cannot resolve local address: ", err)
}
rAddr, err := net.ResolveTCPAddr("tcp", *remoteAddr)
if err != nil {
log.Fatal("cannot resolve remote address: ", err)
}
options := circuit.Options{
ShouldTrip: circuit.RateTripFunc(*threshold, *minSamples),
WindowTime: time.Duration(*windowTime) * time.Millisecond,
WindowBuckets: int(*windowBuckets),
}
cb := circuit.NewBreakerWithOptions(&options)
events := cb.Subscribe()
state.Set("ready")
if *statsdHost != "" && *metricBase != "" && *metricName != "" {
log.Println("logging to statsd")
s, err := g2s.Dial("udp", *statsdHost)
if err != nil {
log.Fatal(err)
}
panel := circuit.NewPanel()
panel.StatsPrefixf = *metricBase + ".%s"
panel.Statter = s
panel.Add(*metricName, cb)
}
go func() {
for {
e := <-events
eventsCount.Add(1)
switch e {
case circuit.BreakerTripped:
state.Set("tripped")
if *verbose {
log.Println("breaker tripped")
}
case circuit.BreakerReset:
state.Set("reset")
if *verbose {
log.Println("breaker reset")
}
case circuit.BreakerFail:
state.Set("fail")
if *verbose {
log.Println("breaker fail")
}
case circuit.BreakerReady:
state.Set("ready")
if *verbose {
log.Println("breaker ready")
}
}
}
}()
listener, err := net.ListenTCP("tcp", addr)
if err != nil {
log.Fatal("cannot bind to local port: ", err)
}
pending, complete := make(chan *net.TCPConn), make(chan *net.TCPConn)
for i := 0; i < 5; i++ {
go handleConn(pending, complete, rAddr, cb)
}
go closeConn(complete)
go func() {
// serve the expvars endpoint
http.ListenAndServe(*expvarAddr, nil)
}()
for {
conn, err := listener.AcceptTCP()
if err != nil {
log.Fatal("error starting listener: ", err)
}
connectionsCount.Add(1)
pending <- conn
}
}
func main() {
var (
redisInstances = flag.String("redis.instances", "", "Semicolon-separated list of comma-separated lists of Redis instances")
redisConnectTimeout = flag.Duration("redis.connect.timeout", 3*time.Second, "Redis connect timeout")
redisReadTimeout = flag.Duration("redis.read.timeout", 3*time.Second, "Redis read timeout")
redisWriteTimeout = flag.Duration("redis.write.timeout", 3*time.Second, "Redis write timeout")
redisMCPI = flag.Int("redis.mcpi", 2, "Max connections per Redis instance")
redisHash = flag.String("redis.hash", "murmur3", "Redis hash function: murmur3, fnv, fnva")
selectGap = flag.Duration("select.gap", 0*time.Millisecond, "delay between pipeline read invocations when Selecting over multiple keys")
maxSize = flag.Int("max.size", 10000, "Maximum number of events per key")
batchSize = flag.Int("batch.size", 100, "keys to select per request")
maxKeysPerSecond = flag.Int64("max.keys.per.second", 1000, "max keys per second to walk")
scanLogInterval = flag.Duration("scan.log.interval", 5*time.Second, "how often to report scan rates in log")
once = flag.Bool("once", false, "walk entire keyspace once and exit (default false, walk forever)")
statsdAddress = flag.String("statsd.address", "", "Statsd address (blank to disable)")
statsdSampleRate = flag.Float64("statsd.sample.rate", 0.1, "Statsd sample rate for normal metrics")
statsdBucketPrefix = flag.String("statsd.bucket.prefix", "myservice.", "Statsd bucket key prefix, including trailing period")
prometheusNamespace = flag.String("prometheus.namespace", "roshiwalker", "Prometheus key namespace, excluding trailing punctuation")
prometheusMaxSummaryAge = flag.Duration("prometheus.max.summary.age", 10*time.Second, "Prometheus max age for instantaneous histogram data")
httpAddress = flag.String("http.address", ":6060", "HTTP listen address (profiling/metrics endpoints only)")
)
flag.Parse()
log.SetOutput(os.Stdout)
log.SetFlags(log.Lmicroseconds)
// Validate integer arguments.
if *maxKeysPerSecond < int64(*batchSize) {
log.Fatal("max keys per second should be bigger than batch size")
}
// Set up instrumentation.
statter := g2s.Noop()
if *statsdAddress != "" {
var err error
statter, err = g2s.Dial("udp", *statsdAddress)
if err != nil {
log.Fatal(err)
}
}
prometheusInstr := prometheus.New(*prometheusNamespace, *prometheusMaxSummaryAge)
prometheusInstr.Install("/metrics", http.DefaultServeMux)
instr := instrumentation.NewMultiInstrumentation(
statsd.New(statter, float32(*statsdSampleRate), *statsdBucketPrefix),
prometheusInstr,
)
// Parse hash function.
var hashFunc func(string) uint32
switch strings.ToLower(*redisHash) {
case "murmur3":
hashFunc = pool.Murmur3
case "fnv":
hashFunc = pool.FNV
case "fnva":
hashFunc = pool.FNVa
default:
log.Fatalf("unknown hash %q", *redisHash)
}
// Set up the clusters.
clusters, err := farm.ParseFarmString(
*redisInstances,
*redisConnectTimeout, *redisReadTimeout, *redisWriteTimeout,
*redisMCPI,
hashFunc,
*maxSize,
*selectGap,
instr,
)
if err != nil {
log.Fatal(err)
}
// HTTP server for profiling.
go func() { log.Print(http.ListenAndServe(*httpAddress, nil)) }()
// Set up our rate limiter. Remember: it's per-key, not per-request.
var (
freq = time.Duration(1/(*maxKeysPerSecond)) * time.Second
bucket = tb.NewBucket(*maxKeysPerSecond, freq)
)
// Build the farm.
var (
readStrategy = farm.SendAllReadAll
repairStrategy = farm.AllRepairs // blocking
writeQuorum = len(clusters) // 100%
dst = farm.New(clusters, writeQuorum, readStrategy, repairStrategy, instr)
)
// Perform the walk.
defer func(t time.Time) { log.Printf("total walk complete, %s", time.Since(t)) }(time.Now())
for {
src := scan(clusters, *batchSize, *scanLogInterval) // new key set
walkOnce(dst, bucket, src, *maxSize, instr)
if *once {
break
}
}
}
func main() {
var (
redisInstances = flag.String("redis.instances", "", "Semicolon-separated list of comma-separated lists of Redis instances")
redisConnectTimeout = flag.Duration("redis.connect.timeout", 3*time.Second, "Redis connect timeout")
redisReadTimeout = flag.Duration("redis.read.timeout", 3*time.Second, "Redis read timeout")
redisWriteTimeout = flag.Duration("redis.write.timeout", 3*time.Second, "Redis write timeout")
redisMCPI = flag.Int("redis.mcpi", 10, "Max connections per Redis instance")
redisHash = flag.String("redis.hash", "murmur3", "Redis hash function: murmur3, fnv, fnva")
farmWriteQuorum = flag.String("farm.write.quorum", "51%", "Write quorum, either number of clusters (2) or percentage of clusters (51%)")
farmReadStrategy = flag.String("farm.read.strategy", "SendAllReadAll", "Farm read strategy: SendAllReadAll, SendOneReadOne, SendAllReadFirstLinger, SendVarReadFirstLinger")
farmReadThresholdRate = flag.Int("farm.read.threshold.rate", 2000, "Baseline SendAll keys read per sec, additional keys are SendOne (SendVarReadFirstLinger strategy only)")
farmReadThresholdLatency = flag.Duration("farm.read.threshold.latency", 50*time.Millisecond, "If a SendOne read has not returned anything after this latency, it's promoted to SendAll (SendVarReadFirstLinger strategy only)")
farmRepairStrategy = flag.String("farm.repair.strategy", "RateLimitedRepairs", "Farm repair strategy: AllRepairs, NoRepairs, RateLimitedRepairs")
farmRepairMaxKeysPerSecond = flag.Int("farm.repair.max.keys.per.second", 1000, "Max repaired keys per second (RateLimited repairer only)")
maxSize = flag.Int("max.size", 10000, "Maximum number of events per key")
selectGap = flag.Duration("select.gap", 0*time.Millisecond, "delay between pipeline read invocations when Selecting over multiple keys")
statsdAddress = flag.String("statsd.address", "", "Statsd address (blank to disable)")
statsdSampleRate = flag.Float64("statsd.sample.rate", 0.1, "Statsd sample rate for normal metrics")
statsdBucketPrefix = flag.String("statsd.bucket.prefix", "myservice.", "Statsd bucket key prefix, including trailing period")
prometheusNamespace = flag.String("prometheus.namespace", "roshiserver", "Prometheus key namespace, excluding trailing punctuation")
prometheusMaxSummaryAge = flag.Duration("prometheus.max.summary.age", 10*time.Second, "Prometheus max age for instantaneous histogram data")
httpAddress = flag.String("http.address", ":6302", "HTTP listen address")
)
flag.Parse()
log.SetOutput(os.Stdout)
log.SetFlags(log.Lmicroseconds)
log.Printf("GOMAXPROCS %d", runtime.GOMAXPROCS(-1))
// Set up statsd instrumentation, if it's specified.
statter := g2s.Noop()
if *statsdAddress != "" {
var err error
statter, err = g2s.Dial("udp", *statsdAddress)
if err != nil {
log.Fatal(err)
}
}
prometheusInstr := prometheus.New(*prometheusNamespace, *prometheusMaxSummaryAge)
prometheusInstr.Install("/metrics", http.DefaultServeMux)
instr := instrumentation.NewMultiInstrumentation(
statsd.New(statter, float32(*statsdSampleRate), *statsdBucketPrefix),
prometheusInstr,
)
// Parse read strategy.
var readStrategy farm.ReadStrategy
switch strings.ToLower(*farmReadStrategy) {
case "sendallreadall":
readStrategy = farm.SendAllReadAll
case "sendonereadone":
readStrategy = farm.SendOneReadOne
case "sendallreadfirstlinger":
readStrategy = farm.SendAllReadFirstLinger
case "sendvarreadfirstlinger":
readStrategy = farm.SendVarReadFirstLinger(*farmReadThresholdRate, *farmReadThresholdLatency)
default:
log.Fatalf("unknown read strategy %q", *farmReadStrategy)
}
log.Printf("using %s read strategy", *farmReadStrategy)
// Parse repair strategy. Note that because this is a client-facing
// production server, all repair strategies get a Nonblocking wrapper!
repairRequestBufferSize := 100
var repairStrategy farm.RepairStrategy
switch strings.ToLower(*farmRepairStrategy) {
case "allrepairs":
repairStrategy = farm.Nonblocking(repairRequestBufferSize, farm.AllRepairs)
case "norepairs":
repairStrategy = farm.Nonblocking(repairRequestBufferSize, farm.NoRepairs)
case "ratelimitedrepairs":
repairStrategy = farm.Nonblocking(repairRequestBufferSize, farm.RateLimited(*farmRepairMaxKeysPerSecond, farm.AllRepairs))
default:
log.Fatalf("unknown repair strategy %q", *farmRepairStrategy)
}
log.Printf("using %s repair strategy", *farmRepairStrategy)
// Parse hash function.
var hashFunc func(string) uint32
switch strings.ToLower(*redisHash) {
case "murmur3":
hashFunc = pool.Murmur3
case "fnv":
hashFunc = pool.FNV
case "fnva":
hashFunc = pool.FNVa
default:
log.Fatalf("unknown hash %q", *redisHash)
}
// Build the farm.
farm, err := newFarm(
*redisInstances,
*farmWriteQuorum,
*redisConnectTimeout, *redisReadTimeout, *redisWriteTimeout,
*redisMCPI,
hashFunc,
readStrategy,
repairStrategy,
*maxSize,
*selectGap,
instr,
)
if err != nil {
log.Fatal(err)
}
// Build the HTTP server.
r := pat.New()
r.Add("GET", "/metrics", http.DefaultServeMux)
r.Add("GET", "/debug", http.DefaultServeMux)
r.Add("POST", "/debug", http.DefaultServeMux)
r.Get("/", handleSelect(farm))
r.Post("/", handleInsert(farm))
r.Delete("/", handleDelete(farm))
h := http.Handler(r)
// Go for it.
log.Printf("listening on %s", *httpAddress)
log.Fatal(http.ListenAndServe(*httpAddress, h))
}
func main() {
s, err := g2s.Dial("udp", *statsDEndpoint)
if err != nil {
log.Fatalf("no transport to statsD endpoint %v: %v", *statsDEndpoint, err)
}
corpus, err := quality.ReadTsvCorpus(*inputFile)
if err != nil {
log.Fatalf("could not read corpus: %v", err)
}
type HTTPAPIResponse struct {
Docs []quality.Doc `json:"docs"`
}
decoder := func(jsn []byte) ([]quality.Doc, error) {
var response HTTPAPIResponse
if err := json.Unmarshal(jsn, &response); err != nil {
return []quality.Doc{}, fmt.Errorf("could not converted from json: %s")
}
return response.Docs, nil
}
api := quality.HTTPAPI{
Site: *searchSite,
Path: *searchPath,
Decoder: decoder,
}
results, err := quality.Crawl(api, corpus, *concurrency, *retries)
if err != nil {
log.Fatalf("crawl aborted: %v", err)
}
fmt.Println()
log.Printf("completed crawl with %v queries", len(results))
es := quality.Evaluators{
"mrr": quality.MRR,
"map": quality.MAP,
"precision-at-1": quality.PrecisionAtK(1),
"precision-at-2": quality.PrecisionAtK(2),
"precision-at-3": quality.PrecisionAtK(3),
"precision-at-4": quality.PrecisionAtK(4),
"precision-at-5": quality.PrecisionAtK(5),
}
for name, e := range es {
summary, err := e(results, corpus)
if err != nil {
log.Fatalf("could not evaluate %v: %v", name, err)
}
key := fmt.Sprintf("%v.%v", *statsDNS, name)
value := fmt.Sprintf("%.5f", summary)
log.Printf("%v: %v", key, value)
s.Gauge(1.0, key, value)
}
log.Printf("done.")
}
func main() {
// Parse command-line flags for this system.
var (
listenAddress = flag.String("addr", "", "Address to listen to incoming requests on.")
ldapAddress = flag.String("ldapAddr", "", "Address to connect to LDAP.")
ldapBindDN = flag.String("ldapBindDN", "", "LDAP DN to bind to for login.")
ldapInsecure = flag.Bool("insecureLDAP", false, "INSECURE: Don't use TLS for LDAP connection.")
ldapBindPassword = flag.String("ldapBindPassword", "", "LDAP password for bind.")
statsdHost = flag.String("statsHost", "", "Address to send statsd metrics to.")
iamAccount = flag.String("iamaccount", "", "AWS Account ID for generating IAM Role ARNs")
enableLDAPRoles = flag.Bool("ldaproles", false, "Enable role support using LDAP directory.")
roleAttribute = flag.String("roleattribute", "", "Group attribute to get role from.")
defaultRole = flag.String("role", "", "AWS role to assume by default.")
configFile = flag.String("conf", "/etc/hologram/server.json", "Config file to load.")
cacheTimeout = flag.Int("cachetime", 3600, "Time in seconds after which to refresh LDAP user cache.")
debugMode = flag.Bool("debug", false, "Enable debug mode.")
config Config
)
flag.Parse()
// Enable debug log output if the user requested it.
if *debugMode {
log.DebugMode(true)
log.Debug("Enabling debug log output. Use sparingly.")
}
// Parse in options from the given config file.
log.Debug("Loading configuration from %s", *configFile)
configContents, configErr := ioutil.ReadFile(*configFile)
if configErr != nil {
log.Errorf("Could not read from config file. The error was: %s", configErr.Error())
os.Exit(1)
}
configParseErr := json.Unmarshal(configContents, &config)
if configParseErr != nil {
log.Errorf("Error in parsing config file: %s", configParseErr.Error())
os.Exit(1)
}
// Merge in command flag options.
if *ldapAddress != "" {
config.LDAP.Host = *ldapAddress
}
if *ldapInsecure {
config.LDAP.InsecureLDAP = true
}
if *ldapBindDN != "" {
config.LDAP.Bind.DN = *ldapBindDN
}
if *ldapBindPassword != "" {
config.LDAP.Bind.Password = *ldapBindPassword
}
if *statsdHost != "" {
config.Stats = *statsdHost
}
if *iamAccount != "" {
config.AWS.Account = *iamAccount
}
if *listenAddress != "" {
config.Listen = *listenAddress
}
if *defaultRole != "" {
config.AWS.DefaultRole = *defaultRole
}
if *enableLDAPRoles {
config.LDAP.EnableLDAPRoles = true
}
if *roleAttribute != "" {
config.LDAP.RoleAttribute = *roleAttribute
}
if *cacheTimeout != 3600 {
config.CacheTimeout = *cacheTimeout
}
var stats g2s.Statter
var statsErr error
if config.LDAP.UserAttr == "" {
config.LDAP.UserAttr = "cn"
}
if config.Stats == "" {
log.Debug("No statsd server specified; no metrics will be emitted by this program.")
stats = g2s.Noop()
} else {
stats, statsErr = g2s.Dial("udp", config.Stats)
if statsErr != nil {
log.Errorf("Error connecting to statsd: %s. No metrics will be emitted by this program.", statsErr.Error())
stats = g2s.Noop()
} else {
log.Debug("This program will emit metrics to %s", config.Stats)
}
}
// Setup the server state machine that responds to requests.
auth, err := aws.GetAuth(os.Getenv("HOLOGRAM_AWSKEY"), os.Getenv("HOLOGRAM_AWSSECRET"), "", time.Now())
if err != nil {
log.Errorf("Error getting instance credentials: %s", err.Error())
os.Exit(1)
}
stsConnection := sts.New(auth, aws.Regions["us-east-1"])
credentialsService := server.NewDirectSessionTokenService(config.AWS.Account, stsConnection)
var ldapServer *ldap.Conn
// Connect to the LDAP server using TLS or not depending on the config
if config.LDAP.InsecureLDAP {
log.Debug("Connecting to LDAP at server %s (NOT using TLS).", config.LDAP.Host)
ldapServer, err = ldap.Dial("tcp", config.LDAP.Host)
if err != nil {
log.Errorf("Could not dial LDAP! %s", err.Error())
os.Exit(1)
}
} else {
// Connect to the LDAP server with sample credentials.
tlsConfig := &tls.Config{
InsecureSkipVerify: true,
}
log.Debug("Connecting to LDAP at server %s.", config.LDAP.Host)
ldapServer, err = ldap.DialTLS("tcp", config.LDAP.Host, tlsConfig)
if err != nil {
log.Errorf("Could not dial LDAP! %s", err.Error())
os.Exit(1)
}
}
if bindErr := ldapServer.Bind(config.LDAP.Bind.DN, config.LDAP.Bind.Password); bindErr != nil {
log.Errorf("Could not bind to LDAP! %s", bindErr.Error())
os.Exit(1)
}
ldapCache, err := server.NewLDAPUserCache(ldapServer, stats, config.LDAP.UserAttr, config.LDAP.BaseDN, config.LDAP.EnableLDAPRoles, config.LDAP.RoleAttribute)
if err != nil {
log.Errorf("Top-level error in LDAPUserCache layer: %s", err.Error())
os.Exit(1)
}
serverHandler := server.New(ldapCache, credentialsService, config.AWS.DefaultRole, stats, ldapServer, config.LDAP.UserAttr, config.LDAP.BaseDN, config.LDAP.EnableLDAPRoles)
server, err := remote.NewServer(config.Listen, serverHandler.HandleConnection)
// Wait for a signal from the OS to shutdown.
terminate := make(chan os.Signal)
signal.Notify(terminate, syscall.SIGINT, syscall.SIGTERM)
// SIGUSR1 and SIGUSR2 should make Hologram enable and disable debug logging,
// respectively.
debugEnable := make(chan os.Signal)
debugDisable := make(chan os.Signal)
signal.Notify(debugEnable, syscall.SIGUSR1)
signal.Notify(debugDisable, syscall.SIGUSR2)
// SIGHUP should make Hologram server reload its cache of user information
// from LDAP.
reloadCacheSigHup := make(chan os.Signal)
signal.Notify(reloadCacheSigHup, syscall.SIGHUP)
// Reload the cache based on time set in configuration
cacheTimeoutTicker := time.NewTicker(time.Duration(config.CacheTimeout) * time.Second)
log.Info("Hologram server is online, waiting for termination.")
WaitForTermination:
for {
select {
case <-terminate:
break WaitForTermination
case <-debugEnable:
log.Info("Enabling debug mode.")
log.DebugMode(true)
case <-debugDisable:
log.Info("Disabling debug mode.")
log.DebugMode(false)
case <-reloadCacheSigHup:
log.Info("Force-reloading user cache.")
ldapCache.Update()
case <-cacheTimeoutTicker.C:
log.Info("Cache timeout. Reloading user cache.")
ldapCache.Update()
}
}
log.Info("Caught signal; shutting down now.")
server.Close()
}