func TestVariance(t *testing.T) {
// Setup sender
tierConfig := make(map[string]coco.TierConfig)
tierConfig["a"] = coco.TierConfig{Targets: []string{"127.0.0.1:25881", "127.0.0.1:25882", "127.0.0.1:25883", "127.0.0.1:25884", "127.0.0.1:25885", "127.0.0.1:25886", "127.0.0.1:25887", "127.0.0.1:25888"}}
var tiers []coco.Tier
for k, v := range tierConfig {
tier := coco.Tier{Name: k, Targets: v.Targets}
tiers = append(tiers, tier)
}
filtered := make(chan collectd.Packet)
go coco.Send(&tiers, filtered)
// Test dispatch
for i := 0; i < 100000; i++ {
send := collectd.Packet{
Hostname: "foo" + string(i),
Plugin: "load",
Type: "load",
}
filtered <- send
}
// Breathe a moment so packet works its way through
for {
time.Sleep(10 * time.Millisecond)
if len(filtered) == 0 {
break
}
}
for _, tier := range tiers {
var min float64
var max float64
for _, v := range tier.Mappings {
size := float64(len(v))
if min == 0 || size < min {
min = size
}
if size > max {
max = size
}
}
variance := max / min
maxVariance := 1.2
t.Logf("Min: %.2f\n", min)
t.Logf("Max: %.2f\n", max)
t.Logf("Variance: %.4f\n", variance)
if variance > maxVariance {
t.Fatalf("Variance was %.4f, expected < %.4f", variance, maxVariance)
}
}
}
/*
Send
- Hash lookup
- Encode a packet
*/
func TestSend(t *testing.T) {
// Setup listener
listenConfig := coco.ListenConfig{
Bind: "127.0.0.1:25887",
Typesdb: "../types.db",
}
samples := make(chan collectd.Packet)
go coco.Listen(listenConfig, samples)
var receive collectd.Packet
done := make(chan bool)
go func() {
receive = <-samples
// https://ariejan.net/2014/08/29/synchronize-goroutines-in-your-tests/
done <- true
}()
// Setup sender
tierConfig := make(map[string]coco.TierConfig)
tierConfig["a"] = coco.TierConfig{Targets: []string{listenConfig.Bind}}
var tiers []coco.Tier
for k, v := range tierConfig {
tier := coco.Tier{Name: k, Targets: v.Targets}
tiers = append(tiers, tier)
}
t.Logf("tiers: %+v\n", tiers)
filtered := make(chan collectd.Packet)
go coco.Send(&tiers, filtered)
// Test dispatch
send := collectd.Packet{
Hostname: "foo",
Plugin: "load",
Type: "load",
}
filtered <- send
<-done
if send.Hostname != receive.Hostname {
t.Errorf("Expected %s got %s", send.Hostname, receive.Hostname)
}
if send.Plugin != receive.Plugin {
t.Errorf("Expected %s got %s", send.Plugin, receive.Plugin)
}
if send.Type != receive.Type {
t.Errorf("Expected %s got %s", send.Type, receive.Type)
}
}
func TestSendWhenMissingConnection(t *testing.T) {
// Setup tiers
tierConfig := make(map[string]coco.TierConfig)
tierConfig["a"] = coco.TierConfig{Targets: []string{"127.0.0.1:29000", "a.example:29000", "b.example:29000", "c.example:29000"}}
var tiers []coco.Tier
for k, v := range tierConfig {
tier := coco.Tier{Name: k, Targets: v.Targets}
tiers = append(tiers, tier)
}
// Launch Api so we can query expvars
apiConfig := coco.ApiConfig{
Bind: "127.0.0.1:26880",
}
blacklisted := map[string]map[string]int64{}
go coco.Api(apiConfig, &tiers, &blacklisted)
poll(t, apiConfig.Bind)
// Launch Send so we can test dispatch behaviour
filtered := make(chan collectd.Packet)
go coco.Send(&tiers, filtered)
// Query the expvars
var actual float64
var expected float64
var vars map[string]interface{}
vars = fetchExpvar(t, apiConfig.Bind)
actual = vars["coco"].(map[string]interface{})["errors"].(map[string]interface{})["send.disconnected"].(float64)
expected = 0
if actual != expected {
t.Fatalf("Expected coco.errors.send.disconnected to be %d, was %d", expected, actual)
}
// Dispatch a single packet
send := collectd.Packet{
Hostname: "foo",
Plugin: "load",
Type: "load",
}
filtered <- send
// Check the failure count has increased
vars = fetchExpvar(t, apiConfig.Bind)
actual = vars["coco"].(map[string]interface{})["errors"].(map[string]interface{})["send.disconnected"].(float64)
expected = 1
if actual != expected {
t.Fatalf("Expected coco.errors.send.disconnected to be %d, was %d", expected, actual)
}
}
func TestVirtualReplicasMagic(t *testing.T) {
// Setup tiers
tierConfig := make(map[string]coco.TierConfig)
tierConfig["a"] = coco.TierConfig{Targets: []string{"127.0.0.1:25811", "127.0.0.1:25812", "127.0.0.1:25813"}}
tierConfig["b"] = coco.TierConfig{Targets: []string{"127.0.0.1:25821", "127.0.0.1:25822", "127.0.0.1:25823"}}
tierConfig["c"] = coco.TierConfig{Targets: []string{"127.0.0.1:25831", "127.0.0.1:25832", "127.0.0.1:25833"}}
var tiers []coco.Tier
for k, v := range tierConfig {
tier := coco.Tier{Name: k, Targets: v.Targets}
tiers = append(tiers, tier)
}
// Setup Send
filtered := make(chan collectd.Packet)
go coco.Send(&tiers, filtered)
// Setup Api
apiConfig := coco.ApiConfig{
Bind: "127.0.0.1:26840",
}
blacklisted := map[string]map[string]int64{}
go coco.Api(apiConfig, &tiers, &blacklisted)
poll(t, apiConfig.Bind)
// Fetch exposed tiers
resp, err := http.Get("http://127.0.0.1:26840/tiers")
if err != nil {
t.Fatalf("HTTP GET failed: %s", err)
}
body, err := ioutil.ReadAll(resp.Body)
//var result []coco.Tier
var result []map[string]interface{}
err = json.Unmarshal(body, &result)
if err != nil {
t.Errorf("Error when decoding JSON %+v.", err)
t.Errorf("Response body: %s", string(body))
t.FailNow()
}
for _, tier := range result {
if tier["virtual_replicas"] == nil {
t.Errorf("tier '%s' doesn't expose virtual replicas", tier["name"])
}
t.Logf("tier '%s' has %.0f virtual replicas", tier["name"], tier["virtual_replicas"])
}
}
func TestSendTiers(t *testing.T) {
// Setup listen
listenConfig := coco.ListenConfig{
Bind: "127.0.0.1:25888",
Typesdb: "../types.db",
}
raw := make(chan collectd.Packet)
go coco.Listen(listenConfig, raw)
count := 0
go func() {
for {
<-raw
count += 1
}
}()
// Setup sender
tierConfig := make(map[string]coco.TierConfig)
tierConfig["a"] = coco.TierConfig{Targets: []string{"127.0.0.1:25888"}}
tierConfig["b"] = coco.TierConfig{Targets: []string{"127.0.0.1:25888"}}
tierConfig["c"] = coco.TierConfig{Targets: []string{"127.0.0.1:25888"}}
var tiers []coco.Tier
for k, v := range tierConfig {
tier := coco.Tier{Name: k, Targets: v.Targets}
tiers = append(tiers, tier)
}
filtered := make(chan collectd.Packet)
go coco.Send(&tiers, filtered)
// Test dispatch
send := collectd.Packet{
Hostname: "foo",
Plugin: "load",
Type: "load",
}
filtered <- send
// Breathe a moment so packet works its way through
time.Sleep(100 * time.Millisecond)
if count != len(tierConfig) {
t.Errorf("Expected %d packets, got %d", len(tierConfig), count)
}
}
func TestTierLookup(t *testing.T) {
// Setup sender
tierConfig := make(map[string]coco.TierConfig)
tierConfig["a"] = coco.TierConfig{Targets: []string{"127.0.0.1:25887"}}
tierConfig["b"] = coco.TierConfig{Targets: []string{"127.0.0.1:25888"}}
tierConfig["c"] = coco.TierConfig{Targets: []string{"127.0.0.1:25889"}}
var tiers []coco.Tier
for k, v := range tierConfig {
tier := coco.Tier{Name: k, Targets: v.Targets}
tiers = append(tiers, tier)
}
filtered := make(chan collectd.Packet)
go coco.Send(&tiers, filtered)
// Setup API
apiConfig := coco.ApiConfig{
Bind: "0.0.0.0:25999",
}
blacklisted := map[string]map[string]int64{}
go coco.Api(apiConfig, &tiers, &blacklisted)
poll(t, apiConfig.Bind)
// Test
resp, err := http.Get("http://127.0.0.1:25999/lookup?name=abc")
if err != nil {
t.Fatalf("HTTP GET failed: %s", err)
}
body, err := ioutil.ReadAll(resp.Body)
var result map[string]string
err = json.Unmarshal(body, &result)
if err != nil {
t.Fatalf("Error when decoding JSON %+v. Response body: %s", err, string(body))
}
for k, v := range tierConfig {
if result[k] != v.Targets[0] {
t.Errorf("Couldn't find tier %s in response: %s", k, string(body))
}
}
}
func main() {
kingpin.Version("1.0.0")
kingpin.Parse()
var config coco.Config
if _, err := toml.DecodeFile(*configPath, &config); err != nil {
log.Fatalln("fatal:", err)
return
}
// Setup data structures to be shared across components
blacklisted := map[string]map[string]int64{}
raw := make(chan collectd.Packet, 1000000)
filtered := make(chan collectd.Packet, 1000000)
items := make(chan coco.BlacklistItem, 1000000)
var tiers []coco.Tier
for k, v := range config.Tiers {
tier := coco.Tier{Name: k, Targets: v.Targets}
tiers = append(tiers, tier)
}
if len(tiers) == 0 {
log.Fatal("No tiers configured. Exiting.")
}
chans := map[string]chan collectd.Packet{
"raw": raw,
"filtered": filtered,
//"blacklist_items": items,
}
go coco.Measure(config.Measure, chans, &tiers)
// Launch components to do the work
go coco.Listen(config.Listen, raw)
for i := 0; i < 4; i++ {
go coco.Filter(config.Filter, raw, filtered, items)
}
go coco.Blacklist(items, &blacklisted)
go coco.Send(&tiers, filtered)
coco.Api(config.Api, &tiers, &blacklisted)
}
func TestMeasureDistributionSummaryStats(t *testing.T) {
// Setup tiers
tierConfig := make(map[string]coco.TierConfig)
tierConfig["a"] = coco.TierConfig{Targets: []string{"127.0.0.1:25811", "127.0.0.1:25812", "127.0.0.1:25813"}}
tierConfig["b"] = coco.TierConfig{Targets: []string{"127.0.0.1:25821", "127.0.0.1:25822", "127.0.0.1:25823"}}
tierConfig["c"] = coco.TierConfig{Targets: []string{"127.0.0.1:25831", "127.0.0.1:25832", "127.0.0.1:25833"}}
for _, v := range tierConfig {
for _, target := range v.Targets {
go MockListener(t, target)
}
}
var tiers []coco.Tier
for k, v := range tierConfig {
tier := coco.Tier{Name: k, Targets: v.Targets}
tiers = append(tiers, tier)
}
// Setup Api
apiConfig := coco.ApiConfig{
Bind: "127.0.0.1:26810",
}
blacklisted := map[string]map[string]int64{}
go coco.Api(apiConfig, &tiers, &blacklisted)
poll(t, apiConfig.Bind)
// Setup Measure
chans := map[string]chan collectd.Packet{}
measureConfig := coco.MeasureConfig{
TickInterval: *new(coco.Duration),
}
measureConfig.TickInterval.UnmarshalText([]byte("100ms"))
go coco.Measure(measureConfig, chans, &tiers)
// Setup Send
filtered := make(chan collectd.Packet)
go coco.Send(&tiers, filtered)
// Push packets to Send
// 1000 hosts
for i := 0; i < 1000; i++ {
// up to 24 cpus per host
iter := rand.Intn(24)
for n := 0; n < iter; n++ {
types := []string{"user", "system", "steal", "wait"}
for _, typ := range types {
filtered <- collectd.Packet{
Hostname: "foo" + string(i),
Plugin: "cpu-" + strconv.Itoa(n),
Type: "cpu-" + typ,
}
}
}
}
time.Sleep(10 * time.Millisecond)
// Fetch exposed expvars
resp, err := http.Get("http://127.0.0.1:26810/debug/vars")
if err != nil {
t.Fatalf("HTTP GET failed: %s", err)
}
body, err := ioutil.ReadAll(resp.Body)
var result map[string]interface{}
err = json.Unmarshal(body, &result)
if err != nil {
t.Errorf("Error when decoding JSON %+v.", err)
t.Errorf("Response body: %s", string(body))
t.FailNow()
}
// Test the exposed expvars data looks sane
tierProps := result["coco"].(map[string]interface{})["hash.metrics_per_host"].(map[string]interface{})
t.Logf("Expvar tier props: %+v\n", tierProps)
if len(tiers) != len(tierProps) {
t.Errorf("Expected %d tiers to be exposed, got %d\n", len(tiers), len(tierProps))
//t.Errorf("Tiers: %+v\n", tiers)
t.Errorf("Exposed tiers: %+v\n", tierProps)
}
for _, tier := range tiers {
targetProps := tierProps[tier.Name].(map[string]interface{})
if len(targetProps) != len(tier.Targets)+1 {
t.Errorf("Expected %d targets to be exposed, got %d\n", len(tier.Targets)+1, len(targetProps))
t.Errorf("Tier targets: %+v\n", tier.Targets)
t.Errorf("Exposed target properties: %+v\n", targetProps)
}
for _, target := range tier.Targets {
props := targetProps[target].(map[string]interface{})
for _, k := range []string{"95e", "avg", "max", "min", "sum"} {
if props[k] == nil {
t.Errorf("Expected %s metric was not exposed on %s\n", k, target)
}
}
}
}
}
func TestEncodeGauge(t *testing.T) {
// Setup listen
listenConfig := coco.ListenConfig{
Bind: "127.0.0.1:25961",
Typesdb: "../types.db",
}
raw := make(chan collectd.Packet, 500)
go coco.Listen(listenConfig, raw)
// Setup sender
tierConfig := make(map[string]coco.TierConfig)
tierConfig["a"] = coco.TierConfig{Targets: []string{listenConfig.Bind}}
var tiers []coco.Tier
for k, v := range tierConfig {
tier := coco.Tier{Name: k, Targets: v.Targets}
tiers = append(tiers, tier)
}
filtered := make(chan collectd.Packet)
go coco.Send(&tiers, filtered)
// Dispatch a sample
value := collectd.Value{
Name: "shortterm",
Type: uint8(1),
TypeName: "gauge",
Value: 0.5,
}
sample := collectd.Packet{
Hostname: "foo",
Plugin: "load",
Type: "load",
Interval: 10,
Time: uint64(time.Now().Unix()),
Values: []collectd.Value{value},
}
filtered <- sample
// Breathe a moment so packet works its way through
time.Sleep(100 * time.Millisecond)
if len(raw) != 1 {
t.Errorf("Expected %d packets, got %d\n", 1, len(raw))
t.FailNow()
}
// Grab a sample
s := <-raw
if len(s.Values) != 1 {
t.Errorf("Expected %d values in sample, got %d\n", 1, len(s.Values))
t.FailNow()
}
v := s.Values[0]
t.Logf("before: %+v\n", value)
t.Logf("after: %+v\n", v)
if value.Value != v.Value {
t.Errorf("Expected value to be %d, got %d\n", value.Value, v.Value)
t.FailNow()
}
}
