VictoriaMetrics/docs/operator/resources/vmrule.md
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---
weight: 10
title: VMRule
menu:
docs:
identifier: operator-cr-vmrule
parent: operator-cr
weight: 10
aliases:
- /operator/resources/vmrule/
- /operator/resources/vmrule/index.html
---
`VMRule` represents [alerting](https://prometheus.io/docs/prometheus/latest/configuration/alerting_rules/)
or [recording](https://prometheus.io/docs/prometheus/latest/configuration/recording_rules/) rules
for [VMAlert](https://docs.victoriametrics.com/operator/resources/vmalert) instances.
The `VMRule` CRD declaratively defines a desired Prometheus rule to be consumed by one or more VMAlert instances.
`VMRule` object generates [VMAlert](https://docs.victoriametrics.com/operator/resources/vmalert)
with ruleset defined at `VMRule` spec.
Alerts and recording rules can be saved and applied as YAML files, and dynamically loaded without requiring any restart.
See more details about rule configuration in [VMAlert docs](https://docs.victoriametrics.com/vmalert#quickstart).
## Specification
You can see the full actual specification of the `VMRule` resource in
the **[API docs -> VMRule](https://docs.victoriametrics.com/operator/api#vmrule)**.
Also, you can check out the [examples](#examples) section.
## Enterprise features
Custom resource `VMRule` supports feature [Multitenancy](https://docs.victoriametrics.com/vmalert#multitenancy)
from [VictoriaMetrics Enterprise](https://docs.victoriametrics.com/enterprise#victoriametrics-enterprise).
### Multitenancy
For using [Multitenancy](https://docs.victoriametrics.com/vmalert#multitenancy) in `VMRule`
you need to **[enable VMAlert Enterprise](https://docs.victoriametrics.com/operator/resources/vmalert#enterprise-features)**.
After that you can add `tenant` field for groups in `VMRule`:
```yaml
apiVersion: operator.victoriametrics.com/v1beta1
kind: VMRule
metadata:
name: vmrule-ent-example
spec:
groups:
- name: vmalert-1
rules:
# using enterprise features: Multitenancy
# more details about multitenancy you can read on https://docs.victoriametrics.com/operator/resources/vmalert#multitenancy
- tenant: 1
alert: vmalert config reload error
expr: delta(vmalert_config_last_reload_errors_total[5m]) > 0
for: 10s
labels:
severity: major
job: "{{ $labels.job }}"
annotations:
value: "{{ $value }}"
description: 'error reloading vmalert config, reload count for 5 min {{ $value }}'
```
## Examples
### Alerting rule
```yaml
apiVersion: operator.victoriametrics.com/v1beta1
kind: VMRule
metadata:
name: vmrule-alerting-example
spec:
groups:
- name: vmalert
rules:
- alert: vmalert config reload error
expr: delta(vmalert_config_last_reload_errors_total[5m]) > 0
for: 10s
labels:
severity: major
job: "{{ $labels.job }}"
annotations:
value: "{{ $value }}"
description: 'error reloading vmalert config, reload count for 5 min {{ $value }}'
```
### Recording rule
```yaml
apiVersion: operator.victoriametrics.com/v1beta1
kind: VMRule
metadata:
name: vmrule-recording-example
spec:
groups:
- name: vmrule_recording_groupname
interval: 1m
rules:
- record: vm_http_request_errors_total:sum_by_cluster_namespace_job:rate:5m
expr: |-
sum by (cluster, namespace, job) (
rate(vm_http_request_errors_total[5m])
)
```