mirror of
https://github.com/VictoriaMetrics/VictoriaMetrics.git
synced 2024-12-26 20:30:10 +01:00
c57e68a0cd
Automated changes by
[create-pull-request](https://github.com/peter-evans/create-pull-request)
GitHub action
Signed-off-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>
Signed-off-by: f41gh7 <nik@victoriametrics.com>
(cherry picked from commit 015f0b0424)
414 lines
16 KiB
Markdown
414 lines
16 KiB
Markdown
---
|
|
weight: 2
|
|
title: VMAlert
|
|
menu:
|
|
docs:
|
|
identifier: operator-cr-vmalert
|
|
parent: operator-cr
|
|
weight: 2
|
|
aliases:
|
|
- /operator/resources/vmalert/
|
|
- /operator/resources/vmalert/index.html
|
|
---
|
|
`VMAlert` - executes a list of given [alerting](https://prometheus.io/docs/prometheus/latest/configuration/alerting_rules/)
|
|
or [recording](https://prometheus.io/docs/prometheus/latest/configuration/recording_rules/) rules against configured address.
|
|
|
|
The `VMAlert` CRD declaratively defines a desired [VMAlert](https://github.com/VictoriaMetrics/VictoriaMetrics/tree/master/app/vmalert)
|
|
setup to run in a Kubernetes cluster.
|
|
|
|
It has few required config options - `datasource` and `notifier` are required, for other config parameters
|
|
check [doc](https://docs.victoriametrics.com/operator/api#vmalert).
|
|
|
|
For each `VMAlert` resource, the Operator deploys a properly configured `Deployment` in the same namespace.
|
|
The VMAlert `Pod`s are configured to mount a list of `Configmaps` prefixed with `<VMAlert-name>-number` containing
|
|
the configuration for alerting rules.
|
|
|
|
For each `VMAlert` resource, the Operator adds `Service` and `VMServiceScrape` in the same namespace prefixed with
|
|
name `<VMAlert-name>`.
|
|
|
|
## Specification
|
|
|
|
You can see the full actual specification of the `VMAlert` resource in the **[API docs -> VMAlert](https://docs.victoriametrics.com/operator/api#vmalert)**.
|
|
|
|
If you can't find necessary field in the specification of the custom resource,
|
|
see [Extra arguments section](./#extra-arguments).
|
|
|
|
Also, you can check out the [examples](#examples) section.
|
|
|
|
## Rules
|
|
|
|
The CRD specifies which `VMRule`s should be covered by the deployed `VMAlert` instances based on label selection.
|
|
The Operator then generates a configuration based on the included `VMRule`s and updates the `Configmaps` containing
|
|
the configuration. It continuously does so for all changes that are made to `VMRule`s or to the `VMAlert` resource itself.
|
|
|
|
Alerting rules are filtered by selectors `ruleNamespaceSelector` and `ruleSelector` in `VMAlert` CRD definition.
|
|
For selecting rules from all namespaces you must specify it to empty value:
|
|
|
|
```yaml
|
|
spec:
|
|
ruleNamespaceSelector: {}
|
|
```
|
|
|
|
[VMRule](https://docs.victoriametrics.com/operator/resources/vmrule) objects generate part of `VMAlert` configuration.
|
|
|
|
For filtering rules `VMAlert` uses selectors `ruleNamespaceSelector` and `ruleSelector`.
|
|
It allows configuring rules access control across namespaces and different environments.
|
|
Specification of selectors you can see in [this doc](https://kubernetes.io/docs/reference/generated/kubernetes-api/v1.27/#labelselector-v1-meta).
|
|
|
|
In addition to the above selectors, the filtering of objects in a cluster is affected by the field `selectAllByDefault` of `VMAlert` spec and environment variable `WATCH_NAMESPACE` for operator.
|
|
|
|
Following rules are applied:
|
|
|
|
- If `ruleNamespaceSelector` and `ruleSelector` both undefined, then by default select nothing. With option set - `spec.selectAllByDefault: true`, select all vmrules.
|
|
- If `ruleNamespaceSelector` defined, `ruleSelector` undefined, then all vmrules are matching at namespaces for given `ruleNamespaceSelector`.
|
|
- If `ruleNamespaceSelector` undefined, `ruleSelector` defined, then all vmrules at `VMAlert`'s namespaces are matching for given `ruleSelector`.
|
|
- If `ruleNamespaceSelector` and `ruleSelector` both defined, then only vmrules at namespaces matched `ruleNamespaceSelector` for given `ruleSelector` are matching.
|
|
|
|
Here's a more visual and more detailed view:
|
|
|
|
| `ruleNamespaceSelector` | `ruleSelector` | `selectAllByDefault` | `WATCH_NAMESPACE` | Selected rules |
|
|
|-------------------------|----------------|----------------------|-------------------|------------------------------------------------------------------------------------------------------|
|
|
| undefined | undefined | false | undefined | nothing |
|
|
| undefined | undefined | **true** | undefined | all vmrules in the cluster |
|
|
| **defined** | undefined | *any* | undefined | all vmrules are matching at namespaces for given `ruleNamespaceSelector` |
|
|
| undefined | **defined** | *any* | undefined | all vmrules only at `VMAlert`'s namespace are matching for given `ruleSelector` |
|
|
| **defined** | **defined** | *any* | undefined | all vmrules only at namespaces matched `ruleNamespaceSelector` for given `ruleSelector` are matching |
|
|
| *any* | undefined | *any* | **defined** | all vmrules only at `VMAlert`'s namespace |
|
|
| *any* | **defined** | *any* | **defined** | all vmrules only at `VMAlert`'s namespace for given `ruleSelector` are matching |
|
|
|
|
More details about `WATCH_NAMESPACE` variable you can read in [this doc](https://docs.victoriametrics.com/operator/configuration#namespaced-mode).
|
|
|
|
Here are some examples of `VMAlert` configuration with selectors:
|
|
|
|
```yaml
|
|
# select all rule objects in the cluster
|
|
apiVersion: operator.victoriametrics.com/v1beta1
|
|
kind: VMAlert
|
|
metadata:
|
|
name: vmalert-select-all
|
|
spec:
|
|
# ...
|
|
selectAllByDefault: true
|
|
|
|
---
|
|
|
|
# select all rule objects in specific namespace (my-namespace)
|
|
apiVersion: operator.victoriametrics.com/v1beta1
|
|
kind: VMAlert
|
|
metadata:
|
|
name: vmalert-select-ns
|
|
spec:
|
|
# ...
|
|
ruleNamespaceSelector:
|
|
matchLabels:
|
|
kubernetes.io/metadata.name: my-namespace
|
|
```
|
|
|
|
## High availability
|
|
|
|
`VMAlert` can be launched with multiple replicas without an additional configuration as far [alertmanager](https://docs.victoriametrics.com/operator/resources/vmalertmanager) is responsible for alert deduplication.
|
|
|
|
Note, if you want to use `VMAlert` with high-available [`VMAlertmanager`](https://docs.victoriametrics.com/operator/resources/vmalertmanager), which has more than 1 replica.
|
|
You have to specify all pod fqdns at `VMAlert.spec.notifiers.[url]`. Or you can use service discovery for notifier, examples:
|
|
|
|
- alertmanager:
|
|
```yaml
|
|
apiVersion: v1
|
|
kind: Secret
|
|
metadata:
|
|
name: vmalertmanager-example-alertmanager
|
|
labels:
|
|
app: vm-operator
|
|
type: Opaque
|
|
stringData:
|
|
alertmanager.yaml: |
|
|
global:
|
|
resolve_timeout: 5m
|
|
route:
|
|
group_by: ['job']
|
|
group_wait: 30s
|
|
group_interval: 5m
|
|
repeat_interval: 12h
|
|
receiver: 'webhook'
|
|
receivers:
|
|
- name: 'webhook'
|
|
webhook_configs:
|
|
- url: 'http://alertmanagerwh:30500/'
|
|
# ...
|
|
|
|
---
|
|
|
|
apiVersion: operator.victoriametrics.com/v1beta1
|
|
kind: VMAlertmanager
|
|
metadata:
|
|
name: example
|
|
namespace: default
|
|
labels:
|
|
usage: dedicated
|
|
spec:
|
|
replicaCount: 2
|
|
configSecret: vmalertmanager-example-alertmanager
|
|
configSelector: {}
|
|
configNamespaceSelector: {}
|
|
# ...
|
|
```
|
|
- vmalert with fqdns:
|
|
```yaml
|
|
apiVersion: operator.victoriametrics.com/v1beta1
|
|
kind: VMAlert
|
|
metadata:
|
|
name: example-ha
|
|
namespace: default
|
|
spec:
|
|
replicaCount: 2
|
|
datasource:
|
|
url: http://vmsingle-example.default.svc:8429
|
|
notifiers:
|
|
- url: http://vmalertmanager-example-0.vmalertmanager-example.default.svc:9093
|
|
- url: http://vmalertmanager-example-1.vmalertmanager-example.default.svc:9093
|
|
evaluationInterval: "10s"
|
|
ruleSelector: {}
|
|
# ...
|
|
```
|
|
- vmalert with service discovery:
|
|
```yaml
|
|
apiVersion: operator.victoriametrics.com/v1beta1
|
|
kind: VMAlert
|
|
metadata:
|
|
name: example-ha
|
|
namespace: default
|
|
spec:
|
|
replicaCount: 2
|
|
datasource:
|
|
url: http://vmsingle-example.default.svc:8429
|
|
notifiers:
|
|
- selector:
|
|
namespaceSelector:
|
|
matchNames:
|
|
- default
|
|
labelSelector:
|
|
matchLabels:
|
|
usage: dedicated
|
|
evaluationInterval: "10s"
|
|
ruleSelector: {}
|
|
# ...
|
|
```
|
|
|
|
In addition, you need to specify `remoteWrite` and `remoteRead` urls for restoring alert states after restarts:
|
|
|
|
```yaml
|
|
apiVersion: operator.victoriametrics.com/v1beta1
|
|
kind: VMAlert
|
|
metadata:
|
|
name: example-ha
|
|
namespace: default
|
|
spec:
|
|
replicaCount: 2
|
|
evaluationInterval: "10s"
|
|
selectAllByDefault: true
|
|
datasource:
|
|
url: http://vmselect-demo.vm.svc:8481/select/0/prometheus
|
|
notifiers:
|
|
- url: http://vmalertmanager-example-0.vmalertmanager-example.default.svc:9093
|
|
- url: http://vmalertmanager-example-1.vmalertmanager-example.default.svc:9093
|
|
remoteWrite:
|
|
url: http://vminsert-demo.vm.svc:8480/insert/0/prometheus
|
|
remoteRead:
|
|
url: http://vmselect-demo.vm.svc:8481/select/0/prometheus
|
|
```
|
|
|
|
More details about `remoteWrite` and `remoteRead` you can read in [vmalert docs](https://docs.victoriametrics.com/vmalert/#alerts-state-on-restarts).
|
|
|
|
## Version management
|
|
|
|
To set `VMAlert` version add `spec.image.tag` name from [releases](https://github.com/VictoriaMetrics/VictoriaMetrics/releases)
|
|
|
|
```yaml
|
|
apiVersion: operator.victoriametrics.com/v1beta1
|
|
kind: VMAlert
|
|
metadata:
|
|
name: example-vmalert
|
|
spec:
|
|
image:
|
|
repository: victoriametrics/vmalert
|
|
tag: v1.93.4
|
|
pullPolicy: Always
|
|
# ...
|
|
```
|
|
|
|
Also, you can specify `imagePullSecrets` if you are pulling images from private repo:
|
|
|
|
```yaml
|
|
apiVersion: operator.victoriametrics.com/v1beta1
|
|
kind: VMAlert
|
|
metadata:
|
|
name: example-vmalert
|
|
spec:
|
|
image:
|
|
repository: victoriametrics/vmalert
|
|
tag: v1.93.4
|
|
pullPolicy: Always
|
|
imagePullSecrets:
|
|
- name: my-repo-secret
|
|
# ...
|
|
```
|
|
|
|
## Resource management
|
|
|
|
You can specify resources for each `VMAlert` resource in the `spec` section of the `VMAlert` CRD.
|
|
|
|
```yaml
|
|
apiVersion: operator.victoriametrics.com/v1beta1
|
|
kind: VMAlert
|
|
metadata:
|
|
name: vmalert-resources-example
|
|
spec:
|
|
# ...
|
|
resources:
|
|
requests:
|
|
memory: "64Mi"
|
|
cpu: "250m"
|
|
limits:
|
|
memory: "128Mi"
|
|
cpu: "500m"
|
|
# ...
|
|
```
|
|
|
|
If these parameters are not specified, then,
|
|
by default all `VMAlert` pods have resource requests and limits from the default values of the following [operator parameters](https://docs.victoriametrics.com/operator/configuration):
|
|
|
|
- `VM_VMALERTDEFAULT_RESOURCE_LIMIT_MEM` - default memory limit for `VMAlert` pods,
|
|
- `VM_VMALERTDEFAULT_RESOURCE_LIMIT_CPU` - default memory limit for `VMAlert` pods,
|
|
- `VM_VMALERTDEFAULT_RESOURCE_REQUEST_MEM` - default memory limit for `VMAlert` pods,
|
|
- `VM_VMALERTDEFAULT_RESOURCE_REQUEST_CPU` - default memory limit for `VMAlert` pods.
|
|
|
|
These default parameters will be used if:
|
|
|
|
- `VM_VMALERTDEFAULT_USEDEFAULTRESOURCES` is set to `true` (default value),
|
|
- `VMAlert` CR doesn't have `resources` field in `spec` section.
|
|
|
|
Field `resources` in `VMAlert` spec have higher priority than operator parameters.
|
|
|
|
If you set `VM_VMALERTDEFAULT_USEDEFAULTRESOURCES` to `false` and don't specify `resources` in `VMAlert` CRD,
|
|
then `VMAlert` pods will be created without resource requests and limits.
|
|
|
|
Also, you can specify requests without limits - in this case default values for limits will not be used.
|
|
|
|
## Enterprise features
|
|
|
|
VMAlert supports features [Reading rules from object storage](https://docs.victoriametrics.com/vmalert#reading-rules-from-object-storage)
|
|
and [Multitenancy](https://docs.victoriametrics.com/vmalert#multitenancy)
|
|
from [VictoriaMetrics Enterprise](https://docs.victoriametrics.com/enterprise#victoriametrics-enterprise).
|
|
|
|
For using Enterprise version of [vmalert](https://docs.victoriametrics.com/vmalert)
|
|
you need to change version of `VMAlert` to version with `-enterprise` suffix using [Version management](#version-management).
|
|
|
|
All the enterprise apps require `-eula` command-line flag to be passed to them.
|
|
This flag acknowledges that your usage fits one of the cases listed on [this page](https://docs.victoriametrics.com/enterprise#victoriametrics-enterprise).
|
|
So you can use [extraArgs](./#extra-arguments) for passing this flag to `VMAlert`:
|
|
|
|
### Reading rules from object storage
|
|
|
|
After that you can pass `-rule` command-line argument with `s3://` or `gs://`
|
|
to `VMAlert` with [extraArgs](./#extra-arguments).
|
|
|
|
More details about reading rules from object storage you can read in [vmalert docs](https://docs.victoriametrics.com/vmalert#reading-rules-from-object-storage).
|
|
|
|
Here are complete example for [Reading rules from object storage](https://docs.victoriametrics.com/vmalert#reading-rules-from-object-storage):
|
|
|
|
```yaml
|
|
apiVersion: operator.victoriametrics.com/v1beta1
|
|
kind: VMAlert
|
|
metadata:
|
|
name: vmalert-ent-example
|
|
spec:
|
|
# enabling enterprise features
|
|
image:
|
|
# enterprise version of vmalert
|
|
tag: v1.93.5-enterprise
|
|
extraArgs:
|
|
# should be true and means that you have the legal right to run a vmalert enterprise
|
|
# that can either be a signed contract or an email with confirmation to run the service in a trial period
|
|
# https://victoriametrics.com/legal/esa/
|
|
eula: true
|
|
|
|
# using enterprise features: Reading rules from object storage
|
|
# more details about reading rules from object storage you can read on https://docs.victoriametrics.com/vmalert#reading-rules-from-object-storage
|
|
rule: s3://bucket/dir/alert.rules
|
|
|
|
# ...other fields...
|
|
```
|
|
|
|
### Multitenancy
|
|
|
|
After enabling enterprise version you can use [Multitenancy](https://docs.victoriametrics.com/vmalert#multitenancy)
|
|
feature in `VMAlert`.
|
|
|
|
For that you need to set `clusterMode` commad-line flag
|
|
with [extraArgs](./#extra-arguments)
|
|
and specify `tenant` field for groups
|
|
in [VMRule](https://docs.victoriametrics.com/operator/resources/vmrule#enterprise-features):
|
|
|
|
```yaml
|
|
apiVersion: operator.victoriametrics.com/v1beta1
|
|
kind: VMAlert
|
|
metadata:
|
|
name: vmalert-ent-example
|
|
spec:
|
|
# enabling enterprise features
|
|
image:
|
|
# enterprise version of vmalert
|
|
tag: v1.93.5-enterprise
|
|
extraArgs:
|
|
# should be true and means that you have the legal right to run a vmalert enterprise
|
|
# that can either be a signed contract or an email with confirmation to run the service in a trial period
|
|
# https://victoriametrics.com/legal/esa/
|
|
eula: true
|
|
|
|
# using enterprise features: Multitenancy
|
|
# more details about multitenancy you can read on https://docs.victoriametrics.com/vmalert#multitenancy
|
|
clusterMode: true
|
|
|
|
# ...other fields...
|
|
|
|
---
|
|
|
|
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/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
|
|
|
|
```yaml
|
|
apiVersion: operator.victoriametrics.com/v1beta1
|
|
kind: VMAlert
|
|
metadata:
|
|
name: example-vmalert
|
|
spec:
|
|
replicaCount: 1
|
|
datasource:
|
|
url: "http://vmsingle-example-vmsingle-persisted.default.svc:8429"
|
|
notifier:
|
|
url: "http://vmalertmanager-example-alertmanager.default.svc:9093"
|
|
evaluationInterval: "30s"
|
|
selectAllByDefault: true
|
|
```
|