Ruler: Support Thanos RuleGroupLabels and Query Offset #8136
Description
Is there an existing issue for this?
- I have searched the existing issues
What happened?
Description
Support Rule Group Labels and query offset for Thanos.
Currently, the version check for that is set to a nonexisting Thanos version.
prometheus-operator/pkg/operator/rules.go
Lines 163 to 164 in 1bbd19e
There is a Query Offset var present in the Thanos ruler:
https://github.com/thanos-io/thanos/blob/c50f95a70a0558bda8631278a61255e92588cf07/cmd/thanos/rule.go#L106
And for the Group Labels, there was an e2e test added to Thanos, to verify that it works.
thanos-io/thanos#8207
Steps to Reproduce
apiVersion: monitoring.coreos.com/v1
kind: PrometheusRule
metadata:
name: test
namespace: test
spec:
groups:
- name: test.rules
labels:
namespace: test
tenant: test
rules:
- alert: Test
expr: vector(1)
labels:
severity: warning
Expected Result
data:
test-test-6c244fbc-9fc6-45e3-b255-52224d15610f.yaml: |
groups:
- name: test.rules
labels:
namespace: test
tenant: test
rules:
- alert: Test
expr: vector(1)
labels:
severity: warning
kind: ConfigMap
Actual Result
Currently, the group labels are removed when rendering the rule configmap.
data:
test-test-6c244fbc-9fc6-45e3-b255-52224d15610f.yaml: |
groups:
- name: test.rules
rules:
- alert: Test
expr: vector(1)
labels:
severity: warning
kind: ConfigMap
Prometheus Operator Version
v0.86.2Kubernetes Version
1.34.2Kubernetes Cluster Type
kubeadm
How did you deploy Prometheus-Operator?
helm chart:prometheus-community/kube-prometheus-stack
Manifests
prometheus-operator log output
{"ts":"2025-12-02T08:50:32.863823871Z","level":"warn","caller":{"function":"github.com/prometheus-operator/prometheus-operator/pkg/operator.(*PrometheusRuleSelector).sanitizePrometheusRulesSpec","file":"/workspace/pkg/operator/rules.go","line":156},"msg":"ignoring group labels since not supported by Thanos","component":"thanos-controller","thanos":"platform-thanos-ruler","namespace":"monitoring","prometheusrule":"test","prometheusrule-namespace":"test","minimum_version":"100.0.0"}Anything else?
No response