mirror of
https://github.com/prometheus/prometheus.git
synced 2024-09-20 07:47:31 -07:00
3929582892
Instead of externally handling timeouts when scraping a target, we set timeouts on the HTTP connection. This ensures that we don't leak goroutines on timeouts. [fixes #181]
110 lines
2.9 KiB
Go
110 lines
2.9 KiB
Go
// Copyright 2013 Prometheus Team
|
|
// Licensed under the Apache License, Version 2.0 (the "License");
|
|
// you may not use this file except in compliance with the License.
|
|
// You may obtain a copy of the License at
|
|
//
|
|
// http://www.apache.org/licenses/LICENSE-2.0
|
|
//
|
|
// Unless required by applicable law or agreed to in writing, software
|
|
// distributed under the License is distributed on an "AS IS" BASIS,
|
|
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
// See the License for the specific language governing permissions and
|
|
// limitations under the License.
|
|
|
|
package retrieval
|
|
|
|
import (
|
|
"github.com/prometheus/prometheus/model"
|
|
"github.com/prometheus/prometheus/retrieval/format"
|
|
"net/http"
|
|
"net/http/httptest"
|
|
"testing"
|
|
"time"
|
|
)
|
|
|
|
func TestTargetScrapeUpdatesState(t *testing.T) {
|
|
testTarget := target{
|
|
scheduler: literalScheduler{},
|
|
state: UNKNOWN,
|
|
address: "bad schema",
|
|
}
|
|
testTarget.Scrape(time.Time{}, make(chan format.Result, 2))
|
|
if testTarget.state != UNREACHABLE {
|
|
t.Errorf("Expected target state %v, actual: %v", UNREACHABLE, testTarget.state)
|
|
}
|
|
}
|
|
|
|
func TestTargetRecordScrapeHealth(t *testing.T) {
|
|
testTarget := target{
|
|
scheduler: literalScheduler{},
|
|
address: "http://example.url",
|
|
baseLabels: model.LabelSet{model.JobLabel: "testjob"},
|
|
}
|
|
|
|
now := time.Now()
|
|
results := make(chan format.Result)
|
|
go testTarget.recordScrapeHealth(results, now, true)
|
|
|
|
result := <-results
|
|
actual := result.Sample
|
|
expected := model.Sample{
|
|
Metric: model.Metric{
|
|
model.MetricNameLabel: model.ScrapeHealthMetricName,
|
|
model.InstanceLabel: "http://example.url",
|
|
model.JobLabel: "testjob",
|
|
},
|
|
Timestamp: now,
|
|
Value: 1,
|
|
}
|
|
|
|
if result.Err != nil {
|
|
t.Fatalf("Got unexpected error: %v", result.Err)
|
|
}
|
|
|
|
if !actual.Equal(expected) {
|
|
t.Fatalf("Expected and actual samples not equal. Expected: %v, actual: %v", expected, actual)
|
|
}
|
|
}
|
|
|
|
func TestTargetScrapeTimeout(t *testing.T) {
|
|
signal := make(chan bool, 1)
|
|
server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
|
|
<-signal
|
|
w.Header().Set("X-Prometheus-API-Version", "0.0.1")
|
|
w.Write([]byte(`[]`))
|
|
}))
|
|
|
|
defer server.Close()
|
|
|
|
testTarget := NewTarget(server.URL, 10*time.Millisecond, model.LabelSet{})
|
|
results := make(chan format.Result, 1024)
|
|
|
|
// scrape once without timeout
|
|
signal <- true
|
|
if err := testTarget.Scrape(time.Now(), results); err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
|
|
// let the deadline lapse
|
|
time.Sleep(15*time.Millisecond)
|
|
|
|
// now scrape again
|
|
signal <- true
|
|
if err := testTarget.Scrape(time.Now(), results); err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
|
|
// now timeout
|
|
if err := testTarget.Scrape(time.Now(), results); err == nil {
|
|
t.Fatal("expected scrape to timeout")
|
|
} else {
|
|
signal <- true // let handler continue
|
|
}
|
|
|
|
// now scrape again without timeout
|
|
signal <- true
|
|
if err := testTarget.Scrape(time.Now(), results); err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
}
|