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fixed label values decoding for pushgateway compatibility (#4727)

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Fixed decoding of label values with slash for pushgateway and prometheus golang client compatibility + added some tests. (#4962)
This commit is contained in:
Alexander Marshalov 2023-07-27 17:09:28 +02:00 committed by Aliaksandr Valialkin
parent 3c297e0253
commit 74237ce5c0
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3 changed files with 5 additions and 1 deletions
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1
docs/CHANGELOG.md
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@ -88,6 +88,7 @@ The previous behavior can be restored in the following ways:
* BUGFIX: [vmalert](https://docs.victoriametrics.com/vmalert.html): reset evaluation timestamp after modifying group interval. Before, there could have latency on rule evaluation time.
* BUGFIX: vmselect: fix timestamp alignment for Prometheus querying API if time argument is less than 10m from the beginning of Unix epoch.
* BUGFIX: [vmagent](https://docs.victoriametrics.com/vmagent.html): do not show [relabel debug](https://docs.victoriametrics.com/vmagent.html#relabel-debug) links at the `/targets` page when `vmagent` runs with `-promscrape.dropOriginalLabels` command-line flag, since it has no the original labels needed for relabel debug. See [this issue](https://github.com/VictoriaMetrics/VictoriaMetrics/issues/4597).
* BUGFIX: vminsert: fixed decoding of label values with slash for pushgateway and prometheus golang client compatibility. See [this issue](https://github.com/VictoriaMetrics/VictoriaMetrics/issues/4692).
* BUGFIX: [MetricsQL](https://docs.victoriametrics.com/MetricsQL.html): properly parse binary operations with reserved words on the right side such as `foo + (on{bar="baz"})`. Previously such queries could lead to panic. See [this issue](https://github.com/VictoriaMetrics/VictoriaMetrics/issues/4422).
* BUGFIX: [Official Grafana dashboards for VictoriaMetrics](https://grafana.com/orgs/victoriametrics): display cache usage for all components on panel `Cache usage % by type` for cluster dashboard. Before, only vmstorage caches were shown.

2
lib/protoparser/common/extra_labels.go
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@ -64,7 +64,7 @@ func getPushgatewayLabels(path string) ([]prompbmarshal.Label, error) {
s = s[n+1:]
}
if isBase64 {
data, err := base64.URLEncoding.DecodeString(value)
data, err := base64.RawURLEncoding.DecodeString(strings.TrimRight(value, "="))
if err != nil {
return nil, fmt.Errorf("cannot base64-decode value=%q for label=%q: %w", value, name, err)
}

3
lib/protoparser/common/extra_labels_test.go
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@ -62,6 +62,9 @@ func TestGetPushgatewayLabelsSuccess(t *testing.T) {
f("/foo/metrics/job@base64/Zm9v", `{job="foo"}`)
f("/foo/metrics/job/x/a/foo/aaa/bar", `{a="foo",aaa="bar",job="x"}`)
f("/foo/metrics/job/x/a@base64/Zm9v", `{a="foo",job="x"}`)
f("/metrics/job/test/region@base64/YXotc291dGhlYXN0LTEtZjAxL3d6eS1hei1zb3V0aGVhc3QtMQ", `{job="test",region="az-southeast-1-f01/wzy-az-southeast-1"}`)
f("/metrics/job/test/empty@base64/=", `{job="test"}`)
f("/metrics/job/test/test@base64/PT0vPT0", `{job="test",test="==/=="}`)
}
func TestGetPushgatewayLabelsFailure(t *testing.T) {