Skip to content

feat: promote StatefulSet metrics to STABLE and enhance docs #2783

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Merged
merged 14 commits into from
Dec 2, 2025
+19 −19
Merged

feat: promote StatefulSet metrics to STABLE and enhance docs #2783

Show file tree
Hide file tree
Changes from 11 commits
Commits
Show all changes
14 commits
Select commit Hold shift + click to select a range
deb8273
promote-statefulset-available-replicas-and-docs
yasicar Sep 28, 2025
fd61b08
Update statefulset-metrics.md
yasicar Sep 28, 2025
b42f1c0
Update statefulset-metrics.md
yasicar Sep 28, 2025
f37ce2a
Update statefulset-metrics.md
yasicar Sep 28, 2025
2b0139d
fix: correct markdown table formatting in statefulset metrics
yasicar Sep 29, 2025
bf43a47
Update statefulset-metrics.md
yasicar Sep 29, 2025
6e306c4
feat: promote StatefulSet experimental metrics to STABLE
yasicar Oct 3, 2025
d843208
feat: promote StatefulSet experimental metrics to BETA
yasicar Oct 5, 2025
61e72fb
feat: promote StatefulSet experimental metrics to BETA
yasicar Oct 5, 2025
0db5451
Merge branch 'promote-statefulset-available-replicas-and-docs' of htt…
yasicar Oct 7, 2025
b763076
Promote StatefulSet metrics to stable
yasicar Oct 9, 2025
fe0e6cf
Addressing comments
yasicar Nov 16, 2025
f2020f9
docs: remove PromQL queries from branch
yasicar Nov 30, 2025
efba9e6
docs: fix markdown lint spacing
yasicar Nov 30, 2025
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
107 changes: 103 additions & 4 deletions docs/metrics/workload/statefulset-metrics.md
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -2,19 +2,118 @@

| Metric name | Metric type | Description | Labels/tags | Status |
| ------------------------------------------------------- | ----------- | --------------------------------------------------------------------------------------------------------------------------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | ------------ |
| kube_statefulset_annotations | Gauge | Kubernetes annotations converted to Prometheus labels controlled via [--metric-annotations-allowlist](../../developer/cli-arguments.md) | `statefulset`=&lt;statefulset-name&gt; <br> `namespace`=&lt;statefulset-namespace&gt; <br> `annotation_STATEFULSET_ANNOTATION`=&lt;STATEFULSET_ANNOTATION&gt; | EXPERIMENTAL |
| kube_statefulset_annotations | Gauge | Kubernetes annotations converted to Prometheus labels controlled via [--metric-annotations-allowlist](../../developer/cli-arguments.md) | `statefulset`=&lt;statefulset-name&gt; <br> `namespace`=&lt;statefulset-namespace&gt; <br> `annotation_STATEFULSET_ANNOTATION`=&lt;STATEFULSET_ANNOTATION&gt; | STABLE |
| kube_statefulset_status_replicas | Gauge | | `statefulset`=&lt;statefulset-name&gt; <br> `namespace`=&lt;statefulset-namespace&gt; | STABLE |
| kube_statefulset_status_replicas_current | Gauge | | `statefulset`=&lt;statefulset-name&gt; <br> `namespace`=&lt;statefulset-namespace&gt; | STABLE |
| kube_statefulset_status_replicas_ready | Gauge | | `statefulset`=&lt;statefulset-name&gt; <br> `namespace`=&lt;statefulset-namespace&gt; | STABLE |
| kube_statefulset_status_replicas_available | Gauge | | `statefulset`=&lt;statefulset-name&gt; <br> `namespace`=&lt;statefulset-namespace&gt; | EXPERIMENTAL |
| kube_statefulset_status_replicas_available | Gauge | | `statefulset`=&lt;statefulset-name&gt; <br> `namespace`=&lt;statefulset-namespace&gt; | STABLE |
| kube_statefulset_status_replicas_updated | Gauge | | `statefulset`=&lt;statefulset-name&gt; <br> `namespace`=&lt;statefulset-namespace&gt; | STABLE |
| kube_statefulset_status_observed_generation | Gauge | | `statefulset`=&lt;statefulset-name&gt; <br> `namespace`=&lt;statefulset-namespace&gt; | STABLE |
| kube_statefulset_replicas | Gauge | | `statefulset`=&lt;statefulset-name&gt; <br> `namespace`=&lt;statefulset-namespace&gt; | STABLE |
| kube_statefulset_ordinals_start | Gauge | | `statefulset`=&lt;statefulset-name&gt; <br> `namespace`=&lt;statefulset-namespace&gt; | STABLE |
| kube_statefulset_metadata_generation | Gauge | | `statefulset`=&lt;statefulset-name&gt; <br> `namespace`=&lt;statefulset-namespace&gt; | STABLE |
| kube_statefulset_persistentvolumeclaim_retention_policy | Gauge | | `statefulset`=&lt;statefulset-name&gt; <br> `namespace`=&lt;statefulset-namespace&gt; <br> `when_deleted`=&lt;statefulset-when-deleted-pvc-policy&gt; <br> `when_scaled`=&lt;statefulset-when-scaled-pvc-policy&gt; | EXPERIMENTAL |
| kube_statefulset_persistentvolumeclaim_retention_policy | Gauge | | `statefulset`=&lt;statefulset-name&gt; <br> `namespace`=&lt;statefulset-namespace&gt; <br> `when_deleted`=&lt;statefulset-when-deleted-pvc-policy&gt; <br> `when_scaled`=&lt;statefulset-when-scaled-pvc-policy&gt; | STABLE |
| kube_statefulset_created | Gauge | | `statefulset`=&lt;statefulset-name&gt; <br> `namespace`=&lt;statefulset-namespace&gt; | STABLE |
| kube_statefulset_labels | Gauge | Kubernetes labels converted to Prometheus labels controlled via [--metric-labels-allowlist](../../developer/cli-arguments.md) | `statefulset`=&lt;statefulset-name&gt; <br> `namespace`=&lt;statefulset-namespace&gt; <br> `label_STATEFULSET_LABEL`=&lt;STATEFULSET_LABEL&gt; | STABLE |
| kube_statefulset_status_current_revision | Gauge | | `statefulset`=&lt;statefulset-name&gt; <br> `namespace`=&lt;statefulset-namespace&gt; <br> `revision`=&lt;statefulset-current-revision&gt; | STABLE |
| kube_statefulset_status_update_revision | Gauge | | `statefulset`=&lt;statefulset-name&gt; <br> `namespace`=&lt;statefulset-namespace&gt; <br> `revision`=&lt;statefulset-update-revision&gt; | STABLE |
| kube_statefulset_deletion_timestamp | Gauge | Unix deletion timestamp | `statefulset`=&lt;statefulset-name&gt; <br> `namespace`=&lt;statefulset-namespace&gt; | EXPERIMENTAL |
| kube_statefulset_deletion_timestamp | Gauge | Unix deletion timestamp | `statefulset`=&lt;statefulset-name&gt; <br> `namespace`=&lt;statefulset-namespace&gt; | STABLE |

## Common PromQL Queries

### StatefulSet Health Monitoring

**Check StatefulSet rollout status:**

```promql
# Percentage of updated replicas
(kube_statefulset_status_replicas_updated / kube_statefulset_replicas) * 100
```

**Monitor unavailable replicas:**

```promql
# Number of unavailable replicas
kube_statefulset_replicas - kube_statefulset_status_replicas_available
```

### Troubleshooting Queries

**Find StatefulSets with outdated replicas:**

```promql
# StatefulSets with replicas not yet updated
kube_statefulset_status_replicas_current != kube_statefulset_status_replicas_updated
```

**StatefulSets stuck during rollout:**

```promql
# StatefulSets where observed generation is behind metadata generation
kube_statefulset_status_observed_generation < kube_statefulset_metadata_generation
```

**StatefulSets with scaling issues:**

```promql
# StatefulSets where current replicas don't match desired
kube_statefulset_status_replicas_current != kube_statefulset_replicas
```

## Major Alerting Rules

### Critical Alerts

**StatefulSet is completely down:**

```yaml
- alert: StatefulSetDown
expr: kube_statefulset_status_replicas_available == 0 and kube_statefulset_replicas > 0
for: 5m
labels:
severity: critical
annotations:
summary: "StatefulSet {{ $labels.statefulset }} is completely down"
description: "StatefulSet {{ $labels.statefulset }} in namespace {{ $labels.namespace }} has no available replicas despite having {{ $labels.replicas }} desired replicas."
```

**StatefulSet rollout stuck:**

```yaml
- alert: StatefulSetRolloutStuck
expr: kube_statefulset_status_observed_generation < kube_statefulset_metadata_generation
for: 15m
labels:
severity: critical
annotations:
summary: "StatefulSet {{ $labels.statefulset }} rollout is stuck"
description: "StatefulSet {{ $labels.statefulset }} in namespace {{ $labels.namespace }} has been stuck rolling out for more than 15 minutes."
```

### Warning Alerts

**StatefulSet has unavailable replicas:**

```yaml
- alert: StatefulSetReplicasUnavailable
expr: (kube_statefulset_replicas - kube_statefulset_status_replicas_available) > 0
for: 5m
labels:
severity: warning
annotations:
summary: "StatefulSet {{ $labels.statefulset }} has unavailable replicas"
description: "StatefulSet {{ $labels.statefulset }} in namespace {{ $labels.namespace }} has {{ $value }} unavailable replicas."
```

**StatefulSet replica count mismatch:**

```yaml
- alert: StatefulSetReplicasMismatch
expr: kube_statefulset_status_replicas_current != kube_statefulset_replicas
for: 10m
labels:
severity: warning
annotations:
summary: "StatefulSet {{ $labels.statefulset }} replica count mismatch"
description: "StatefulSet {{ $labels.statefulset }} in namespace {{ $labels.namespace }} has {{ $labels.status_replicas_current }} current replicas but {{ $labels.replicas }} are desired."
```
8 changes: 4 additions & 4 deletions internal/store/statefulset.go
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -82,7 +82,7 @@ func statefulSetMetricFamilies(allowAnnotationsList, allowLabelsList []string) [
"kube_statefulset_status_replicas_available",
"The number of available replicas per StatefulSet.",
metric.Gauge,
basemetrics.ALPHA,
basemetrics.STABLE,
"",
wrapStatefulSetFunc(func(s *v1.StatefulSet) *metric.Family {
return &metric.Family{
Expand Down Expand Up @@ -218,7 +218,7 @@ func statefulSetMetricFamilies(allowAnnotationsList, allowLabelsList []string) [
"kube_statefulset_persistentvolumeclaim_retention_policy",
"Count of retention policy for StatefulSet template PVCs",
metric.Gauge,
basemetrics.ALPHA,
basemetrics.STABLE,

"",
wrapStatefulSetFunc(func(s *v1.StatefulSet) *metric.Family {
Expand All @@ -245,7 +245,7 @@ func statefulSetMetricFamilies(allowAnnotationsList, allowLabelsList []string) [
descStatefulSetAnnotationsName,
descStatefulSetAnnotationsHelp,
metric.Gauge,
basemetrics.ALPHA,
basemetrics.STABLE,
"",
wrapStatefulSetFunc(func(s *v1.StatefulSet) *metric.Family {
if len(allowAnnotationsList) == 0 {
Expand Down Expand Up @@ -325,7 +325,7 @@ func statefulSetMetricFamilies(allowAnnotationsList, allowLabelsList []string) [
"kube_statefulset_deletion_timestamp",
"Unix deletion timestamp",
metric.Gauge,
basemetrics.ALPHA,
basemetrics.STABLE,
"",
wrapStatefulSetFunc(func(s *v1.StatefulSet) *metric.Family {
ms := []*metric.Metric{}
Expand Down
Loading