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app/vmalert: sanitize label names before sending to Alertmanager (#5442)

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Before, vmalert would send notifications with labels containing characters
  not supported by Alertmanager validator, resulting into validation errors
  like `msg="Failed to validate alerts" err="invalid label set: invalid name "foo.bar"`

Signed-off-by: hagen1778 <roman@victoriametrics.com>
This commit is contained in:
Roman Khavronenko 2023-12-08 14:53:35 +01:00 committed by Aliaksandr Valialkin
parent ae38a4db97
commit f0099c4db7
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GPG key ID: 52C003EE2BCDB9EB
3 changed files with 7 additions and 1 deletions
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2
app/vmalert/notifier/alert.go
View file

@ -191,7 +191,7 @@ func (a Alert) toPromLabels(relabelCfg *promrelabel.ParsedConfigs) []prompbmarsh
var labels []prompbmarshal.Label
for k, v := range a.Labels {
labels = append(labels, prompbmarshal.Label{
Name: k,
Name: promrelabel.SanitizeMetricName(k),
Value: v,
})
}

5
app/vmalert/notifier/alert_test.go
View file

@ -234,6 +234,11 @@ func TestAlert_toPromLabels(t *testing.T) {
[]prompbmarshal.Label{{Name: "a", Value: "baz"}, {Name: "foo", Value: "bar"}},
nil,
)
fn(
map[string]string{"foo.bar": "baz", "service!name": "qux"},
[]prompbmarshal.Label{{Name: "foo_bar", Value: "baz"}, {Name: "service_name", Value: "qux"}},
nil,
)
pcs, err := promrelabel.ParseRelabelConfigsData([]byte(`
- target_label: "foo"

1
docs/CHANGELOG.md
View file

@ -18,6 +18,7 @@ The following tip changes can be tested by building VictoriaMetrics components f
* SECURITY: upgrade base docker image (Alpine) from 3.18.4 to 3.18.5. See [alpine 3.18.5 release notes](https://www.alpinelinux.org/posts/Alpine-3.15.11-3.16.8-3.17.6-3.18.5-released.html).
* SECURITY: upgrade Go builder from Go1.21.4 to Go1.21.5. See [the list of issues addressed in Go1.21.5](https://github.com/golang/go/issues?q=milestone%3AGo1.21.5+label%3ACherryPickApproved).
* BUGFIX: [vmalert](https://docs.victoriametrics.com/vmalert.html): sanitize label names before sending the alert notification to Alertmanager. Before, vmalert would send notifications with labels containing characters not supported by Alertmanager validator, resulting into validation errors like `msg="Failed to validate alerts" err="invalid label set: invalid name "foo.bar"`.
* BUGFIX: properly escape `<` character in responses returned via [`/federate`](https://docs.victoriametrics.com/#federation) endpoint. See [this issue](https://github.com/VictoriaMetrics/VictoriaMetrics/issues/5431).
## [v1.87.11](https://github.com/VictoriaMetrics/VictoriaMetrics/releases/tag/v1.87.11)