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main_test.go
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main_test.go
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package main
import (
"bytes"
"context"
"encoding/json"
"flag"
"fmt"
"github.com/coreos/etcd/mvcc/mvccpb"
"github.com/signalfx/gateway/protocol/carbon"
"github.com/signalfx/golib/datapoint"
"github.com/signalfx/golib/datapoint/dpsink"
"github.com/signalfx/golib/httpdebug"
"github.com/signalfx/golib/web"
"io"
"io/ioutil"
"net"
"net/http"
_ "net/http/pprof"
"net/url"
"os"
"path"
"path/filepath"
"runtime"
"strconv"
"strings"
"sync"
"sync/atomic"
"syscall"
"testing"
"time"
"github.com/coreos/etcd/clientv3"
"github.com/coreos/etcd/embed"
"github.com/signalfx/embetcd/embetcd"
"github.com/signalfx/gateway/config"
"github.com/signalfx/gateway/flaghelpers"
"github.com/signalfx/gateway/protocol/signalfx"
_ "github.com/signalfx/go-metrics"
"github.com/signalfx/golib/datapoint/dptest"
"github.com/signalfx/golib/errors"
"github.com/signalfx/golib/log"
"github.com/signalfx/golib/nettest"
"github.com/signalfx/golib/pointer"
"github.com/signalfx/golib/timekeeper"
"github.com/signalfx/golib/timekeeper/timekeepertest"
_ "github.com/signalfx/ondiskencoding"
. "github.com/smartystreets/goconvey/convey"
_ "github.com/spaolacci/murmur3"
"gotest.tools/assert"
)
const configEtcd = `
{
"ClusterName": "<<CLUSTERNAME>>",
"LogFormat": "logfmt",
"LogDir": "-",
"NumProcs":4,
"DebugFlag": "debugme",
"LocalDebugServer": "127.0.0.1:0",
"ForwardTo": [
{
"DefaultAuthToken": "___AUTH_TOKEN___",
"Name": "testproxy",
"type": "signalfx-json"
},
{
"Filename": "/tmp/filewrite.csv",
"Name": "filelocal",
"type": "csv"
}
],
"ListenFrom": [ ],
"MaxGracefulWaitTime": "<<MAX>>ms",
"GracefulCheckInterval": "<<CHECK>>ms",
"MinimalGracefulWaitTime": "<<MIN>>ms",
"SilentGracefulTime": "50ms",
"ServerName": "<<SERVERNAME>>",
"ListenOnPeerAddress": "<<LPADDRESS>>",
"AdvertisePeerAddress": "<<APADDRESS>>",
"ListenOnClientAddress": "<<LCADDRESS>>",
"AdvertiseClientAddress": "<<ACADDRESS>>",
"ETCDMetricsAddress": "<<MADDRESS>>",
"UnhealthyMemberTTL": "<<UNHEALTHYTTL>>ms",
"RemoveMemberTimeout": "<<REMOVEMEMBERTIMEOUT>>ms",
"ClusterDataDir": "<<DATADIR>>",
"ClusterOperation": "<<CLUSTEROP>>",
"TargetClusterAddresses": [
<<TARGETADDRESSES>>
]
}
`
const config1 = `
{
"LogFormat": "logfmt",
"LogDir": "-",
"NumProcs":4,
"DebugFlag": "debugme",
"ListenFrom":[
{
"Type":"carbon",
"ListenAddr": "127.0.0.1:0"
},
{
"Type":"carbon",
"Name": "duplicate listener",
"ListenAddr": "127.0.0.1:0",
"MetricDeconstructor": "commakeys",
"MetricDeconstructorOptions": "mtypedim:metrictype"
},
{
"Type":"signalfx",
"ListenAddr": "127.0.0.1:0"
}
],
"LocalDebugServer": "127.0.0.1:0",
"ForwardTo":[
{
"Type":"carbon",
"Host":"127.0.0.1",
"Name": "testForwardTo",
"Port": <<PORT>>
},
{
"type": "signalfx-json",
"DefaultAuthToken": "AAA",
"url": "http://localhost:9999/v2/datapoint",
"eventURL": "http://localhost:9999/v2/event",
"FormatVersion": 3
}
],
"MaxGracefulWaitTime": "<<MAX>>ms",
"GracefulCheckInterval": "<<CHECK>>ms",
"MinimalGracefulWaitTime": "<<MIN>>ms",
"SilentGracefulTime": "50ms",
"InternalMetricsListenerAddress": "<<INTERNALMETRICS>>",
"EmitDebugMetrics": true,
"StatsDelay": "1s"
}
`
const invalidForwarderConfig = `
{
"LogDir": "-",
"ListenFrom":[
],
"ForwardTo":[
{
"Type":"unkndfdown"
}
]
}
`
const invalidListenerConfig = `
{
"LogDir": "-",
"ListenFrom":[
{
"Type":"unknown"
}
],
"ForwardTo":[
]
}
`
const dupeForwarder = `
{
"LogDir": "-",
"ForwardTo":[
{
"Type":"signalfx"
},
{
"Type":"signalfx"
}
]
}
`
const dupeListener = `
{
"LogDir": "-",
"ListenFrom":[
{
"Type":"signalfx"
},
{
"Type":"signalfx"
}
],
"ForwardTo":[
]
}
`
const invalidPIDfile = `
{
"LogDir": "-",
"PidFilename":"/",
"ListenFrom":[
],
"ForwardTo":[
]
}
`
const emptyConfig = `
{
"ListenFrom":[
],
"ForwardTo":[
],
"StatsDelay": "0s"
}
`
const badInnternalMetrics = `
{
"ListenFrom":[
],
"ForwardTo":[
],
"InternalMetricsListenerAddress": "0.0.0.0:999999"
}
`
const internalMetrics = `
{
"ListenFrom":[
],
"ForwardTo":[
],
"InternalMetricsListenerAddress": "0.0.0.0:0"
}
`
const invalidClusterOpConfig = `
{
"ListenFrom":[
],
"ForwardTo":[
],
"StatsDelay": "5s",
"ClusterOperation": "woohoo"
}
`
const invalidDebugServerAddr = `
{
"LogDir": "-",
"LocalDebugServer":"127.0.0.1:999999",
"ListenFrom":[
],
"ForwardTo":[
]
}
`
type goMaxProcs struct {
lastVal int64
}
func (g *goMaxProcs) Set(i int) int {
return int(atomic.SwapInt64(&g.lastVal, int64(i)))
}
func Test_setupGoMaxProcs(t *testing.T) {
Convey("setup go max procs", t, func() {
gmp := &goMaxProcs{lastVal: 0}
setupGoMaxProcs(&config.GatewayConfig{}, gmp.Set)
So(gmp.lastVal, ShouldEqual, runtime.NumCPU())
setupGoMaxProcs(&config.GatewayConfig{NumProcs: pointer.Int(3)}, gmp.Set)
So(gmp.lastVal, ShouldEqual, 3)
})
}
func Test_GetContext(t *testing.T) {
Convey("GetContext", t, func() {
So(GetContext(nil), ShouldEqual, context.Background())
So(GetContext(context.Background()), ShouldEqual, context.Background())
})
}
func Test_Main(t *testing.T) {
defer func() {
// reset package flags
flags = &gatewayFlags{}
flagParse = flag.Parse
}()
flags.configFileName = "__INVALID_FILENAME__"
main()
// check with the version flag set
flags.version = true
main()
assert.Equal(t, false, flags.version, "version flag should reset to false after printing the gateway version")
}
type ConcurrentByteBuffer struct {
*bytes.Buffer
lock sync.Mutex
}
func (c *ConcurrentByteBuffer) Write(p []byte) (n int, err error) {
c.lock.Lock()
defer c.lock.Unlock()
return c.Buffer.Write(p)
}
func Test_logIfCtxExceeded(t *testing.T) {
Convey("logIfCtxExceeded", t, func() {
logBuf := &ConcurrentByteBuffer{&bytes.Buffer{}, sync.Mutex{}}
logger := log.NewHierarchy(log.NewLogfmtLogger(io.MultiWriter(logBuf, os.Stderr), log.Panic))
ctx, cancel := context.WithCancel(context.Background())
logIfCtxExceeded(ctx, logger)
So(logBuf.String(), ShouldContainSubstring, "Graceful shutdown complete")
logBuf.Reset()
cancel()
logIfCtxExceeded(ctx, logger)
So(logBuf.String(), ShouldContainSubstring, "Exceeded graceful shutdown period")
})
}
func failingTestRun(t *testing.T, c string, closeAfterSetup bool, expectedLog string, expectedErr string) context.CancelFunc {
var cc context.CancelFunc
Convey("failing config test", t, func() {
logBuf := &ConcurrentByteBuffer{&bytes.Buffer{}, sync.Mutex{}}
logger := log.NewHierarchy(log.NewLogfmtLogger(io.MultiWriter(logBuf, os.Stderr), log.Panic))
logger.Log("config", c, "Trying config")
fileObj, err := ioutil.TempFile("", "TestProxy")
So(err, ShouldBeNil)
filename := fileObj.Name()
So(os.Remove(filename), ShouldBeNil)
ctx, contextCancel := context.WithCancel(context.Background())
So(ioutil.WriteFile(filename, []byte(c), os.FileMode(0666)), ShouldBeNil)
p := gateway{
tk: timekeeper.RealTime{},
setupDoneSignal: make(chan struct{}),
stdout: logBuf,
}
if closeAfterSetup {
go func() {
<-p.setupDoneSignal
contextCancel()
}()
} else {
cc = contextCancel
}
// loadedConfig
var loadedConfig *config.GatewayConfig
loadedConfig, err = loadConfig(filename, logger)
// set config on gateway instance
if loadedConfig != nil {
writePidFile(loadedConfig, logger)
p.configure(loadedConfig)
err = p.start(ctx)
}
if expectedErr != "" {
fmt.Println(logBuf.String())
So(err, ShouldNotBeNil)
So(errors.Details(err), ShouldContainSubstring, expectedErr)
} else {
So(err, ShouldBeNil)
}
if expectedLog != "" {
So(logBuf.String(), ShouldContainSubstring, expectedLog)
}
})
return cc
}
func TestConfigs(t *testing.T) {
tests := []struct {
name string
config string
closeAfterSetup bool
expectedLog string
expectedErr string
}{
{name: "empty", config: emptyConfig, closeAfterSetup: true, expectedLog: "", expectedErr: ""},
{name: "invalidForwarderConfig", config: invalidForwarderConfig, closeAfterSetup: false, expectedLog: "", expectedErr: "cannot find config unkndfdown"},
{name: "invalidDebugAddr", config: invalidDebugServerAddr, closeAfterSetup: false, expectedLog: "", expectedErr: "cannot setup debug server"},
{name: "validInternalMetrics", config: internalMetrics, closeAfterSetup: true, expectedLog: "", expectedErr: ""},
{name: "invalidInternalMetrics", config: badInnternalMetrics, closeAfterSetup: false, expectedLog: "", expectedErr: "listen tcp: address 999999: invalid port"},
{name: "invalidJSON", config: "__INVALID__JSON__", closeAfterSetup: false, expectedLog: "", expectedErr: "cannot unmarshal config JSON"},
{name: "invalidListenerConfig", config: invalidListenerConfig, closeAfterSetup: false, expectedLog: "", expectedErr: "cannot setup listeners from configuration"},
{name: "invalidPIDfile", config: invalidPIDfile, closeAfterSetup: true, expectedLog: "cannot store pid in pid file", expectedErr: ""},
{name: "invalidClusterOp", config: invalidClusterOpConfig, closeAfterSetup: true, expectedLog: "", expectedErr: "unsupported cluster-op specified \"woohoo\""},
{name: "dupeForwarder", config: dupeForwarder, closeAfterSetup: false, expectedLog: "", expectedErr: errDupeForwarder.Error()},
{name: "dupeListener", config: dupeListener, closeAfterSetup: false, expectedLog: "", expectedErr: errDupeListener.Error()},
}
for _, test := range tests {
t.Run(test.name, func(t *testing.T) {
failingTestRun(t, test.config, test.closeAfterSetup, test.expectedLog, test.expectedErr)
})
}
}
func TestForwarderName(t *testing.T) {
Convey("Forwarder names", t, func() {
So(forwarderName(&config.ForwardTo{Name: pointer.String("bob")}), ShouldEqual, "bob")
So(forwarderName(&config.ForwardTo{Type: "atype"}), ShouldEqual, "atype")
})
}
func TestProxy1(t *testing.T) {
var cancelfunc context.CancelFunc
Convey("a setup carbon gateway", t, func() {
sendTo := dptest.NewBasicSink()
var ctx context.Context
ctx, cancelfunc = context.WithCancel(context.Background())
var p *gateway
var mainDoneChan chan error
var filename string
var cl *carbon.Listener
checkError := false
setUp := func(max int, min int, check int, internalMetricsAddress string) {
go func() {
for {
ln, _ := net.Listen("tcp", "localhost:9999")
if ln != nil {
conn, _ := ln.Accept()
time.Sleep(time.Second)
_ = conn.Close()
}
}
}()
logBuf := &ConcurrentByteBuffer{&bytes.Buffer{}, sync.Mutex{}}
logger := log.NewHierarchy(log.NewLogfmtLogger(io.MultiWriter(logBuf, os.Stderr), log.Panic))
fileObj, err := ioutil.TempFile("", "TestProxy")
So(err, ShouldBeNil)
etcdDataDir, err := ioutil.TempDir("", "TestProxy1")
So(err, ShouldBeNil)
So(os.RemoveAll(etcdDataDir), ShouldBeNil)
filename = fileObj.Name()
So(os.Remove(filename), ShouldBeNil)
cconf := &carbon.ListenerConfig{}
cl, err = carbon.NewListener(sendTo, cconf)
So(err, ShouldBeNil)
openPort := nettest.TCPPort(cl)
proxyConf := strings.Replace(config1, "<<PORT>>", strconv.FormatInt(int64(openPort), 10), -1)
proxyConf = strings.Replace(proxyConf, "<<MAX>>", strconv.FormatInt(int64(max), 10), -1)
proxyConf = strings.Replace(proxyConf, "<<MIN>>", strconv.FormatInt(int64(min), 10), -1)
proxyConf = strings.Replace(proxyConf, "<<CHECK>>", strconv.FormatInt(int64(check), 10), -1)
proxyConf = strings.Replace(proxyConf, "<<INTERNALMETRICS>>", internalMetricsAddress, -1)
So(ioutil.WriteFile(filename, []byte(proxyConf), os.FileMode(0666)), ShouldBeNil)
fmt.Println("Launching server...")
p = newGateway()
p.logger = logger
loadedConfig, _ := loadConfig(filename, logger)
p.configure(loadedConfig)
mainDoneChan = make(chan error)
go func() {
mainDoneChan <- p.start(ctx)
close(mainDoneChan)
}()
<-p.setupDoneSignal
}
Convey("should have signalfx listener too", func() {
setUp(1000, 0, 25, "0.0.0.0:2500")
So(p, ShouldNotBeNil)
sfxListenPort := nettest.TCPPort(p.listeners[2].(*signalfx.ListenerServer))
resp, err := http.Post(fmt.Sprintf("http://127.0.0.1:%d/v2/datapoint", sfxListenPort), "application/json", strings.NewReader("{}"))
So(err, ShouldBeNil)
So(resp.StatusCode, ShouldEqual, http.StatusOK)
So(resp.Header.Get("X-Response-Id"), ShouldNotEqual, "")
})
Convey("should have debug values", func() {
setUp(1000, 0, 25, "0.0.0.0:2501")
So(p, ShouldNotBeNil)
listenPort := nettest.TCPPort(p.debugServerListener)
resp, err := http.Get(fmt.Sprintf("http://127.0.0.1:%d/debug/vars", listenPort))
So(err, ShouldBeNil)
So(resp.StatusCode, ShouldEqual, http.StatusOK)
})
Convey("should gateway a carbon point", func() {
setUp(1000, 0, 25, "0.0.0.0:2501")
So(p, ShouldNotBeNil)
dp := dptest.DP()
dp.Dimensions = nil
dp.Timestamp = dp.Timestamp.Round(time.Second)
So(p.forwarders[0].AddDatapoints(ctx, []*datapoint.Datapoint{dp}), ShouldBeNil)
seenDatapoint := sendTo.Next()
So(seenDatapoint, ShouldNotBeNil)
})
Convey("getLogOutput should work correctly", func() {
setUp(1000, 0, 25, "0.0.0.0:2502")
So(p, ShouldNotBeNil)
So(p.getLogOutput(&config.GatewayConfig{
LogDir: pointer.String("-"),
}), ShouldEqual, os.Stdout)
So(p.getLogOutput(&config.GatewayConfig{
LogDir: pointer.String(""),
LogMaxSize: pointer.Int(0),
LogMaxBackups: pointer.Int(0),
}), ShouldNotEqual, os.Stdout)
l := p.getLogger(&config.GatewayConfig{
LogDir: pointer.String("-"),
LogFormat: pointer.String("json"),
})
So(l.(*log.ErrorLogLogger).RootLogger, ShouldHaveSameTypeAs, &log.JSONLogger{})
})
Convey("max time exceed should work correctly", func() {
setUp(0, 0, 25, "0.0.0.0:2503")
So(p, ShouldNotBeNil)
})
Convey("", func() {
setUp(1000, 0, 25, "0.0.0.0:2504")
So(p, ShouldNotBeNil)
sfxListenPort := nettest.TCPPort(p.listeners[2].(*signalfx.ListenerServer))
go func() {
for {
_, err := http.Post(fmt.Sprintf("http://127.0.0.1:%d/v2/datapoint", sfxListenPort), "application/json", strings.NewReader("{ \"gauge\": [{ \"metric\": \"test.gauge\", \"dimensions\": { \"host\": \"testserver\" }, \"value\": 42 }]}"))
log.IfErr(log.Discard, err)
time.Sleep(time.Millisecond)
}
}()
for p.Pipeline() == 0 {
time.Sleep(time.Millisecond * 10)
}
})
Reset(func() {
p.signalChan <- syscall.SIGTERM
time.Sleep(time.Millisecond)
err := <-mainDoneChan
if checkError {
So(err, ShouldNotBeNil)
checkError = false
}
So(os.Remove(filename), ShouldBeNil)
So(cl.Close(), ShouldBeNil)
if cancelfunc != nil {
cancelfunc()
}
})
})
}
var errTest = errors.New("test")
func Test_NonNil(t *testing.T) {
assert.Equal(t, FirstNonNil(errTest), errTest)
}
// there will be a test on this later
type addfunc func(http.ResponseWriter, *http.Request)
func (f addfunc) DebugEndpoints() map[string]http.Handler {
return map[string]http.Handler{"/sampler": http.HandlerFunc(f)}
}
func debugEndpointHandleFunc(rw http.ResponseWriter, req *http.Request) {
rw.Write([]byte(`"OK"`))
}
func TestDebugEndpoints(t *testing.T) {
Convey("test handle endpoints", t, func() {
listener, err := net.Listen("tcp", "0.0.0.0:0")
So(err, ShouldBeNil)
p := &gateway{}
p.debugServerListener = listener
p.debugServer = httpdebug.New(&httpdebug.Config{
Logger: log.DefaultLogger,
ExplorableObj: p,
})
m := map[string]http.Handler{}
// casting func to type addfunc so it can satisfy the protocol.DebugEndpointer interface, which in turn casts the func itself to be an http.HandlerFunc which implements the http.Handler interface
p.addEndpoints(addfunc(debugEndpointHandleFunc), m)
p.handleEndpoints(m)
wg := sync.WaitGroup{}
wg.Add(1)
go func() {
p.debugServer.Serve(listener)
wg.Done()
}()
runtime.Gosched()
listenPort := nettest.TCPPort(p.debugServerListener)
resp, err := http.Get(fmt.Sprintf("http://127.0.0.1:%d/sampler", listenPort))
So(err, ShouldBeNil)
So(resp.StatusCode, ShouldEqual, 200)
So(p.debugServerListener.Close(), ShouldBeNil)
wg.Wait()
})
}
// The following functions are test fixtures for cluster tests
func formatTargetAddresses(targetClusters []string) (targetAddresses string) {
for index, address := range targetClusters {
targetAddresses += fmt.Sprintf("\"%s\"", address)
if index < (len(targetClusters) - 1) {
targetAddresses += ","
}
targetAddresses += "\n"
}
return
}
/* Cluster Tests */
// The following functions are test fixtures for TestProxyCluster
func setConfigFile(etcdConf *embetcd.Config, max int, min int, check int) (configFilePath string, tempDir string) {
// get a temporary directory for the etcd data directory
tempDir, err := ioutil.TempDir("", "TestProxyCluster")
So(err, ShouldBeNil)
So(os.RemoveAll(tempDir), ShouldBeNil)
// get a temporary filename for the config file
fileObj, err := ioutil.TempFile("", "TestProxyClusterConfig")
So(err, ShouldBeNil)
configFilePath = fileObj.Name()
// remove the temp file so we can overwrite it
So(os.Remove(configFilePath), ShouldBeNil)
//// remove the temp dir so we can recreate it
proxyConf := configEtcd
proxyConf = strings.Replace(proxyConf, "<<MAX>>", strconv.FormatInt(int64(max), 10), -1)
proxyConf = strings.Replace(proxyConf, "<<MIN>>", strconv.FormatInt(int64(min), 10), -1)
proxyConf = strings.Replace(proxyConf, "<<CHECK>>", strconv.FormatInt(int64(check), 10), -1)
proxyConf = strings.Replace(proxyConf, "<<LPADDRESS>>", etcdConf.LPUrls[0].String(), -1)
proxyConf = strings.Replace(proxyConf, "<<APADDRESS>>", etcdConf.APUrls[0].String(), -1)
proxyConf = strings.Replace(proxyConf, "<<LCADDRESS>>", etcdConf.LCUrls[0].String(), -1)
proxyConf = strings.Replace(proxyConf, "<<ACADDRESS>>", etcdConf.ACUrls[0].String(), -1)
proxyConf = strings.Replace(proxyConf, "<<MADDRESS>>", etcdConf.ListenMetricsUrls[0].String(), -1)
proxyConf = strings.Replace(proxyConf, "<<UNHEALTHYTTL>>", etcdConf.UnhealthyTTL.String(), -1)
proxyConf = strings.Replace(proxyConf, "<<REMOVEMEMBERTIMEOUT>>", etcdConf.RemoveMemberTimeout.String(), -1)
proxyConf = strings.Replace(proxyConf, "<<DATADIR>>", filepath.Join(tempDir, etcdConf.Dir), -1)
proxyConf = strings.Replace(proxyConf, "<<CLUSTEROP>>", etcdConf.ClusterState, -1)
proxyConf = strings.Replace(proxyConf, "<<TARGETADDRESSES>>", formatTargetAddresses(etcdConf.InitialCluster), -1)
proxyConf = strings.Replace(proxyConf, "<<SERVERNAME>>", etcdConf.Name, -1)
proxyConf = strings.Replace(proxyConf, "<<CLUSTERNAME>>", etcdConf.ClusterName, -1)
So(ioutil.WriteFile(path.Join(configFilePath), []byte(proxyConf), os.FileMode(0666)), ShouldBeNil)
return configFilePath, tempDir
}
// startTestGateway starts a gateway and waits for it to signal that setup is down or for the
// main function to return an error
func startTestGateway(ctx context.Context, gw *gateway) chan error {
mainErrCh := make(chan error, 1)
go func() {
mainErrCh <- gw.start(ctx)
close(mainErrCh)
}()
// wait for the gateway to start or error out
select {
case <-gw.setupDoneSignal:
case <-mainErrCh:
}
return mainErrCh
}
func tearDownClusterTest(cancel context.CancelFunc, configFiles []string, etcdDataDirs []string) {
// remove test config files
for _, filename := range configFiles {
So(os.Remove(filename), ShouldBeNil)
}
// remove test etcd data directories
for _, etcdDataDirPath := range etcdDataDirs {
// remove the temp dir so we can recreate it
So(os.RemoveAll(etcdDataDirPath), ShouldBeNil)
}
}
func TestGetTempEtcdClient(t *testing.T) {
Convey("test temp etcd client", t, func() {
ctx, cancelFunc := context.WithCancel(context.Background())
go func(f context.CancelFunc) {
time.Sleep(time.Millisecond * 100)
f()
}(cancelFunc)
_, _, err := getTempEtcdClient(ctx, log.Discard, []string{}, &embetcd.Config{
AutoSyncInterval: pointer.Duration(time.Millisecond),
DialTimeout: pointer.Duration(time.Millisecond),
})
So(err, ShouldNotBeNil)
})
}
func TestProxyCluster(t *testing.T) {
Convey("the etcd cluster should...", t, func() {
// initialize storage test structures
var configFiles []string
var etcdDataDirs []string
var ctx context.Context
var cancel context.CancelFunc
Convey("be aware of all members", func() {
etcdConfigs := []*embetcd.Config{
{Config: &embed.Config{Name: "instance1", Dir: "etcd-data", ClusterState: "seed", LCUrls: []url.URL{{Scheme: "http", Host: "127.0.0.1:2379"}}, ACUrls: []url.URL{{Scheme: "http", Host: "127.0.0.1:2379"}}, LPUrls: []url.URL{{Scheme: "http", Host: "127.0.0.1:2380"}}, APUrls: []url.URL{{Scheme: "http", Host: "127.0.0.1:2380"}}, ListenMetricsUrls: []url.URL{{Scheme: "http", Host: "127.0.0.1:2381"}}}, ClusterName: "test-cluster-1", InitialCluster: []string{}, RemoveMemberTimeout: pointer.Duration(3000 * time.Second), UnhealthyTTL: pointer.Duration(1000 * time.Millisecond)},
{Config: &embed.Config{Name: "instance2", Dir: "etcd-data1", ClusterState: "join", LCUrls: []url.URL{{Scheme: "http", Host: "127.0.0.1:2479"}}, ACUrls: []url.URL{{Scheme: "http", Host: "127.0.0.1:2479"}}, LPUrls: []url.URL{{Scheme: "http", Host: "127.0.0.1:2480"}}, APUrls: []url.URL{{Scheme: "http", Host: "127.0.0.1:2480"}}, ListenMetricsUrls: []url.URL{{Scheme: "http", Host: "127.0.0.1:2481"}}}, ClusterName: "test-cluster-1", InitialCluster: []string{"127.0.0.1:2379", "127.0.0.1:2479", "127.0.0.1:2579"}, RemoveMemberTimeout: pointer.Duration(3000 * time.Second), UnhealthyTTL: pointer.Duration(1000 * time.Millisecond)},
{Config: &embed.Config{Name: "instance3", Dir: "etcd-data2", ClusterState: "join", LCUrls: []url.URL{{Scheme: "http", Host: "127.0.0.1:2579"}}, ACUrls: []url.URL{{Scheme: "http", Host: "127.0.0.1:2579"}}, LPUrls: []url.URL{{Scheme: "http", Host: "127.0.0.1:2580"}}, APUrls: []url.URL{{Scheme: "http", Host: "127.0.0.1:2580"}}, ListenMetricsUrls: []url.URL{{Scheme: "http", Host: "127.0.0.1:2581"}}}, ClusterName: "test-cluster-1", InitialCluster: []string{"127.0.0.1:2379"}, RemoveMemberTimeout: pointer.Duration(-1 * time.Second), UnhealthyTTL: pointer.Duration(1000 * time.Millisecond)},
{Config: &embed.Config{Name: "instance4", Dir: "etcd-data3", ClusterState: "client", LCUrls: []url.URL{{Scheme: "http", Host: "127.0.0.1:2679"}}, ACUrls: []url.URL{{Scheme: "http", Host: "127.0.0.1:2679"}}, LPUrls: []url.URL{{Scheme: "http", Host: "127.0.0.1:2680"}}, APUrls: []url.URL{{Scheme: "http", Host: "127.0.0.1:2680"}}, ListenMetricsUrls: []url.URL{{Scheme: "http", Host: "127.0.0.1:2681"}}}, ClusterName: "test-cluster-1", InitialCluster: []string{"127.0.0.1:2379", "127.0.0.1:2479", "127.0.0.1:2579"}, RemoveMemberTimeout: pointer.Duration(3000 * time.Second), UnhealthyTTL: pointer.Duration(1000 * time.Millisecond)},
}
gateways := make([]*gateway, 0, len(etcdConfigs))
mainErrChs := make([]chan error, 0, len(etcdConfigs))
configFiles = make([]string, 0, len(etcdConfigs))
etcdDataDirs = make([]string, 0, len(etcdConfigs))
// set up logger
logBuf := &ConcurrentByteBuffer{&bytes.Buffer{}, sync.Mutex{}}
logger := log.NewHierarchy(log.NewLogfmtLogger(io.MultiWriter(logBuf, os.Stderr), log.Panic))
// test context
ctx, cancel = context.WithCancel(context.Background())
defer cancel()
var numClients int
// set up config files
for index, config := range etcdConfigs {
// create the configuration file
configFile, etcdDataDir := setConfigFile(config, 5000, 0, 25)
configFiles = append(configFiles, configFile)
etcdDataDirs = append(etcdDataDirs, etcdDataDir)
// create gateway struct with config file path set as a flag
gw := &gateway{
logger: logger.CreateChild(),
stdout: os.Stdout,
tk: timekeeper.RealTime{},
setupDoneSignal: make(chan struct{}),
signalChan: make(chan os.Signal),
}
flags = &gatewayFlags{}
flags.operation = flaghelpers.NewStringFlag()
if index == 0 {
flags.operation.Set("seed")
}
loadedConfig, _ := loadConfig(configFile, logger)
loadedConfig.EtcdServerStartTimeout = pointer.Duration(time.Second * 60)
gw.configure(loadedConfig)
// start the gateway
mainErrChs = append(mainErrChs, startTestGateway(ctx, gw))
gateways = append(gateways, gw)
// verify that the gateway started successfully
if config.ClusterState != "client" {
So(gw.etcdServer, ShouldNotBeNil)
So(gw.etcdServer.IsRunning(), ShouldBeTrue)
} else {
numClients++
So(gw.etcdServer, ShouldBeNil)
}
// there should always be a client
So(gw.etcdClient, ShouldNotBeNil)
}
// check that each instance is aware of each other
// take into account that one of the instances is a client only and does not have members
for _, gw := range gateways {
if gw.etcdServer != nil {
// There's only one member that is a client and not running the etcd server we must account for this
So(len(gw.etcdServer.Server.Cluster().Members()), ShouldEqual, len(gateways)-numClients)
}
if gw.etcdClient != nil {
resp, err := gw.etcdClient.Get(ctx, "__etcd-cluster__", clientv3.WithPrefix())
So(err, ShouldBeNil)
So(resp.Kvs, ShouldNotBeNil)
So(len(resp.Kvs), ShouldBeGreaterThan, len(gateways)-numClients)
}
}
// shutdown the cluster
// send sigterm to each gateway
for index, g := range gateways {
fmt.Println("signaling server: ", *g.config.ServerName)
g.signalChan <- syscall.SIGTERM
val := <-mainErrChs[index]
fmt.Println(*g.config.ServerName, "returned", val)
// This is a little hacky but it lets us avoid writing a dedicated
// test to get coverage for the runningLoop() case where etcdStopCh returns
g.signalChan = make(chan os.Signal, 5)
// if the etcd server is nil the next statement out side of this if will block forever
if g.etcdServer == nil {
close(g.signalChan)
}
fmt.Println(g.runningLoop(context.Background()))
}
return
})
Reset(func() {
tearDownClusterTest(cancel, configFiles, etcdDataDirs)
})
})
}
type myetcd struct {
lock sync.Mutex
closeCh chan struct{}
watchChs []chan clientv3.WatchResponse
watchCh chan clientv3.WatchResponse
members []*mvccpb.KeyValue
}
func newEtcd() *myetcd {
m := &myetcd{
lock: sync.Mutex{},
closeCh: make(chan struct{}, 0),
watchChs: []chan clientv3.WatchResponse{},
watchCh: make(chan clientv3.WatchResponse, 100),
members: []*mvccpb.KeyValue{},
}
m.start()
return m
}
func (m *myetcd) start() {
go func() {
for {
select {
case msg := <-m.watchCh:
m.lock.Lock()
// broadcast to all instances watching
for _, ch := range m.watchChs {
ch <- clientv3.WatchResponse{
Events: []*clientv3.Event{
{
Type: msg.Events[0].Type,
Kv: &mvccpb.KeyValue{Key: msg.Events[0].Kv.Key, Value: msg.Events[0].Kv.Value},
},
},
}
}
m.lock.Unlock()
case <-m.closeCh:
m.lock.Lock()
for _, ch := range m.watchChs {
close(ch)
}
m.members = m.members[:0]
m.watchChs = m.watchChs[:0]
m.lock.Unlock()
return
}
}
}()
}
func (m *myetcd) close() {
close(m.closeCh)
}
func (m *myetcd) Get(ctx context.Context, key string, opts ...clientv3.OpOption) (*clientv3.GetResponse, error) {
m.lock.Lock()
defer m.lock.Unlock()
members := make([]*mvccpb.KeyValue, len(m.members))
copy(members, m.members)
return &clientv3.GetResponse{
Kvs: members,
}, nil
}
func (m *myetcd) Grant(ctx context.Context, ttl int64) (*clientv3.LeaseGrantResponse, error) {
return &clientv3.LeaseGrantResponse{}, nil
}
func (m *myetcd) KeepAlive(ctx context.Context, id clientv3.LeaseID) (<-chan *clientv3.LeaseKeepAliveResponse, error) {
ch := make(chan *clientv3.LeaseKeepAliveResponse, 1)
ch <- &clientv3.LeaseKeepAliveResponse{}
return ch, nil
}
func (m *myetcd) Watch(ctx context.Context, key string, opts ...clientv3.OpOption) clientv3.WatchChan {
m.lock.Lock()
defer m.lock.Unlock()
ch := make(chan clientv3.WatchResponse, 100)
m.watchChs = append(m.watchChs, ch)
return ch
}
func (m *myetcd) Put(ctx context.Context, key, val string, opts ...clientv3.OpOption) (*clientv3.PutResponse, error) {
m.lock.Lock()
defer m.lock.Unlock()
m.members = append(m.members, &mvccpb.KeyValue{Key: []byte(key), Value: []byte(val)})
m.watchCh <- clientv3.WatchResponse{
Events: []*clientv3.Event{
{
Type: mvccpb.PUT,
Kv: &mvccpb.KeyValue{Key: []byte(key), Value: []byte(val)},
},
},
}
return &clientv3.PutResponse{}, nil
}
func (m *myetcd) Delete(ctx context.Context, key string, opts ...clientv3.OpOption) (*clientv3.DeleteResponse, error) {
m.lock.Lock()
defer m.lock.Unlock()
var val []byte
bkey := []byte(key)
new := make([]*mvccpb.KeyValue, 0)
for _, mem := range m.members {
if !bytes.Equal(mem.Key, bkey) {
new = append(new, mem)
} else {
val = mem.Value
}
}
if len(new) != len(m.members) {
m.members = new
m.watchCh <- clientv3.WatchResponse{
Events: []*clientv3.Event{
{
Type: mvccpb.DELETE,
Kv: &mvccpb.KeyValue{Key: []byte(key), Value: val},
},
},
}
return &clientv3.DeleteResponse{}, nil
}
return &clientv3.DeleteResponse{}, fmt.Errorf("failed to delete key")
}
func Test_handleClusterNameResponse(t *testing.T) {
tempCli := newEtcd()
kvs := make([]*mvccpb.KeyValue, 1)
kvs[0] = &mvccpb.KeyValue{Key: []byte("hello")}
resp := &clientv3.GetResponse{
Kvs: kvs,
}
p := &gateway{config: &config.GatewayConfig{EtcdDialTimeout: pointer.Duration(time.Second * 5)}}
if err := p.handleClusterNameResponse(context.Background(), tempCli, resp, "bananas"); err == nil {
t.Errorf("handleClusterName should have returned an error because the existing key doesn't match")
return
}
if err := p.handleClusterNameResponse(context.Background(), tempCli, &clientv3.GetResponse{}, "bananas"); err != nil {
t.Errorf("should have created the new cluster name")
return
}
resp, err := tempCli.Get(context.Background(), "bananas")
if err != nil {
t.Errorf("the temp cli should not have returned an error when fetching the new key")
}
if string(resp.Kvs[0].Value) != "bananas" {
t.Errorf("the new key %s does not match what it should be %s", string(resp.Kvs[0].Value), "bananas")
}
}
const statsDelayConfig = `
{
<<STATSDELAY>>
<<EMITDEBUGMETRICS>>
<<INTERNALMETRICSLISTENER>>
"LogFormat": "logfmt",
"LogDir": "-",
"NumProcs":4,
"DebugFlag": "debugme",
"ListenFrom":[
{
"Type":"signalfx",
"ListenAddr": "127.0.0.1:0"
}
],
"LocalDebugServer": "127.0.0.1:0",
"ForwardTo":[
{
"type": "signalfx-json",
"DefaultAuthToken": "AAA",
"url": "http://localhost:<<PORT>>/v2/datapoint",
"eventURL": "http://localhost:<<PORT>>/v2/event",
"traceURL": "http://localhost:<<PORT>>/v1/trace"
}
]
}
`
func getStatsDelayConfig(statsDelay *string, emitDebugMetrics *bool, internalMetricsListenerAddress *string) string {