func TestExpressions(t *testing.T) {
temporaryDirectory, err := ioutil.TempDir("", "leveldb_metric_persistence_test")
if err != nil {
t.Errorf("Could not create temporary directory: %q\n", err)
return
}
defer func() {
if err = os.RemoveAll(temporaryDirectory); err != nil {
t.Errorf("Could not remove temporary directory: %q\n", err)
}
}()
persistence, err := leveldb.NewLevelDBMetricPersistence(temporaryDirectory)
if err != nil {
t.Errorf("Could not create LevelDB Metric Persistence: %q\n", err)
return
}
if persistence == nil {
t.Errorf("Received nil LevelDB Metric Persistence.\n")
return
}
defer func() {
persistence.Close()
}()
storeMatrix(persistence, testMatrix)
ast.SetPersistence(persistence)
for _, exprTest := range expressionTests {
expectedLines := annotateWithTime(exprTest.output)
testExpr, err := LoadExprFromString(exprTest.expr)
if err != nil {
if exprTest.shouldFail {
continue
}
t.Errorf("Error during parsing: %v", err)
t.Errorf("Expression: %v", exprTest.expr)
} else {
failed := false
resultStr := ast.EvalToString(testExpr, &testEvalTime, ast.TEXT)
resultLines := strings.Split(resultStr, "\n")
if len(exprTest.output) != len(resultLines) {
t.Errorf("Number of samples in expected and actual output don't match")
failed = true
}
for _, expectedSample := range expectedLines {
found := false
for _, actualSample := range resultLines {
if actualSample == expectedSample {
found = true
}
}
if !found {
t.Errorf("Couldn't find expected sample in output: '%v'",
expectedSample)
failed = true
}
}
if failed {
t.Errorf("Expression: %v\n%v", exprTest.expr, vectorComparisonString(expectedLines, resultLines))
}
}
}
}
func main() {
flag.Parse()
conf, err := config.LoadFromFile(*configFile)
if err != nil {
log.Fatalf("Error loading configuration from %s: %v", configFile, err)
}
persistence, err := leveldb.NewLevelDBMetricPersistence(*metricsStoragePath)
if err != nil {
log.Print(err)
os.Exit(1)
}
go func() {
notifier := make(chan os.Signal)
signal.Notify(notifier, os.Interrupt)
<-notifier
persistence.Close()
os.Exit(0)
}()
defer persistence.Close()
scrapeResults := make(chan retrieval.Result, 4096)
targetManager := retrieval.NewTargetManager(scrapeResults, 1)
targetManager.AddTargetsFromConfig(conf)
ruleResults := make(chan *rules.Result, 4096)
ast.SetPersistence(persistence)
ruleManager := rules.NewRuleManager(ruleResults, conf.Global.EvaluationInterval)
err = ruleManager.AddRulesFromConfig(conf)
if err != nil {
log.Fatalf("Error loading rule files: %v", err)
}
go func() {
gorest.RegisterService(new(api.MetricsService))
exporter := registry.DefaultRegistry.YieldExporter()
http.Handle("/", gorest.Handle())
http.Handle("/metrics.json", exporter)
http.Handle("/static/", http.StripPrefix("/static/", http.FileServer(http.Dir("static"))))
http.ListenAndServe(":9090", nil)
}()
for {
select {
case scrapeResult := <-scrapeResults:
//fmt.Printf("scrapeResult -> %s\n", scrapeResult)
for _, sample := range scrapeResult.Samples {
persistence.AppendSample(&sample)
}
case ruleResult := <-ruleResults:
//fmt.Printf("ruleResult -> %s\n", ruleResult)
for _, sample := range ruleResult.Samples {
persistence.AppendSample(sample)
}
}
}
}