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Wrap the server with the Prometheus so we get metrics + add an e2e te…
…st for it. I wrapped it in a job, since otherwise it will be trickier to get access to the metrics from outside the kind cluster. Fix the dangling pointer from sigstore#262 and fix a tiny typo, though I kind of do like exposing a singingCert that might come handy in karaoke? Signed-off-by: Ville Aikas <vaikas@chainguard.dev>
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,115 @@ | ||
| // Copyright 2021 The Sigstore Authors. | ||
| // | ||
| // 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 main | ||
|
|
||
| import ( | ||
| "flag" | ||
| "fmt" | ||
| "log" | ||
| "net/http" | ||
|
|
||
| dto "github.com/prometheus/client_model/go" | ||
| "github.com/prometheus/common/expfmt" | ||
| ) | ||
|
|
||
| func fatal(err error) { | ||
| if err != nil { | ||
| log.Fatalln(err) | ||
| } | ||
| } | ||
|
|
||
| func parseMF(url string) (map[string]*dto.MetricFamily, error) { | ||
| resp, err := http.Get(url) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| defer resp.Body.Close() | ||
|
|
||
| var parser expfmt.TextParser | ||
| return parser.TextToMetricFamilies(resp.Body) | ||
| } | ||
|
|
||
| func main() { | ||
| f := flag.String("url", "http://fulcio-server.fulcio-dev.svc:2112/metrics", "set url to fetch metrics from") | ||
| flag.Parse() | ||
|
|
||
| mf, err := parseMF(*f) | ||
| fatal(err) | ||
|
|
||
| // Just grab the api_latency metric, make sure it's a histogram | ||
| // and just make sure there is at least one 200, and no errors there. | ||
| latency, ok := mf["fulcio_api_latency"] | ||
| if !ok || latency == nil { | ||
| log.Fatal("Did not get fulcio_api_latency metric") | ||
| } | ||
| if err := checkLatency(latency); err != nil { | ||
| log.Fatalf("fulcio_api_latency metric failed: %s", err) | ||
| } | ||
|
|
||
| // Then make sure the cert counter went up. | ||
| certCount, ok := mf["fulcio_new_certs"] | ||
| if !ok || certCount == nil { | ||
| log.Fatal("Did not get fulcio_new_certs metric") | ||
| } | ||
| if err := checkCertCount(certCount); err != nil { | ||
| log.Fatalf("fulcio_new_certs metric failed: %s", err) | ||
| } | ||
| } | ||
|
|
||
| // Make sure latency is a Histogram, and it has a POST with a 200. | ||
| func checkLatency(latency *dto.MetricFamily) error { | ||
| if *latency.Type != *dto.MetricType_HISTOGRAM.Enum() { | ||
| return fmt.Errorf("Wrong type, wanted %+v, got: %+v", dto.MetricType_HISTOGRAM.Enum(), latency.Type) | ||
| } | ||
| if len(latency.Metric) != 1 { | ||
| return fmt.Errorf("Got multiple entries, or none for metric, wanted one, got: %+v", latency.Metric) | ||
| } | ||
| // Make sure there's a 'post' and it's a 200. | ||
| var code string | ||
| var method string | ||
| for _, value := range latency.Metric[0].Label { | ||
| if *value.Name == "code" { | ||
| code = *value.Value | ||
| } | ||
| if *value.Name == "method" { | ||
| method = *value.Value | ||
| } | ||
| } | ||
| if code != "200" { | ||
| return fmt.Errorf("unexpected code, wanted 200, got %s", code) | ||
| } | ||
| if method != "post" { | ||
| return fmt.Errorf("unexpected method, wanted post, got %s", method) | ||
| } | ||
|
|
||
| if *latency.Metric[0].Histogram.SampleCount != 1 { | ||
| return fmt.Errorf("Unexpected samplecount, wanted 1, got %d", *latency.Metric[0].Histogram.SampleCount) | ||
| } | ||
| return nil | ||
| } | ||
|
|
||
| func checkCertCount(certCount *dto.MetricFamily) error { | ||
| if *certCount.Type != *dto.MetricType_COUNTER.Enum() { | ||
| return fmt.Errorf("Wrong type, wanted %+v, got: %+v", dto.MetricType_COUNTER.Enum(), certCount.Type) | ||
| } | ||
| if len(certCount.Metric) != 1 { | ||
| return fmt.Errorf("Got multiple entries, or none for metric, wanted one, got: %+v", certCount.Metric) | ||
| } | ||
| if *certCount.Metric[0].Counter.Value < 1 { | ||
| return fmt.Errorf("Got incorrect cert count, wanted one, got: %f", *certCount.Metric[0].Counter.Value) | ||
| } | ||
| return nil | ||
| } |