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VictoriaMetrics/docs/operator/resources/vmagent.md

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---
sort: 1
weight: 1
title: VMAgent
menu:
docs:
parent: "operator-custom-resources"
weight: 1
aliases:
- /operator/resources/vmagent.html
---
# VMAgent
`VMAgent` represents agent, which helps you collect metrics from various sources and stores them in VictoriaMetrics.
The `VMAgent` CRD declaratively defines a desired [VMAgent](https://docs.victoriametrics.com/vmagent)
setup to run in a Kubernetes cluster.
It requires access to Kubernetes API and you can create RBAC for it first, it can be found
at [`examples/vmagent_rbac.yaml`](https://github.com/VictoriaMetrics/operator/blob/master/config/examples/vmagent_rbac.yaml)
Or you can use default rbac account, that will be created for `VMAgent` by operator automatically.
For each `VMAgent` resource Operator deploys a properly configured `Deployment` in the same namespace.
The VMAgent `Pod`s are configured to mount a `Secret` prefixed with `<VMAgent-name>` containing the configuration
for VMAgent.
For each `VMAgent` resource, the Operator adds `Service` and `VMServiceScrape` in the same namespace prefixed with
name `<VMAgent-name>`.
The CRD specifies which `VMServiceScrape` should be covered by the deployed VMAgent instances based on label selection.
The Operator then generates a configuration based on the included `VMServiceScrape`s and updates the `Secret` which
contains the configuration. It continuously does so for all changes that are made to the `VMServiceScrape`s or the
`VMAgent` resource itself.
If no selection of `VMServiceScrape`s is provided - Operator leaves management of the `Secret` to the user,
so user can set custom configuration while still benefiting from the Operator's capabilities of managing VMAgent setups.
## Specification
You can see the full actual specification of the `VMAgent` resource in the **[API docs -> VMAgent](../api.md#vmagent)**.
If you can't find necessary field in the specification of the custom resource,
see [Extra arguments section](./README.md#extra-arguments).
Also, you can check out the [examples](#examples) section.
## Scraping
`VMAgent` supports scraping targets with:
- [VMServiceScrape](./vmservicescrape.md),
- [VMPodScrape](./vmpodscrape.md),
- [VMNodeScrape](./vmnodescrape.md),
- [VMStaticScrape](./vmstaticscrape.md),
- [VMProbe](./vmprobe.md).
These objects tell VMAgent from which targets and how to collect metrics and
generate part of [VMAgent](./vmagent.md) scrape configuration.
For filtering scrape objects `VMAgent` uses selectors.
Selectors are defined with suffixes - `NamespaceSelector` and `Selector` for each type of scrape objects in spec of `VMAgent`:
- `serviceScrapeNamespaceSelector` and `serviceScrapeSelector` for selecting [VMServiceScrape](./vmservicescrape.md) objects,
- `podScrapeNamespaceSelector` and `podScrapeSelector` for selecting [VMPodScrape](./vmpodscrape.md) objects,
- `probeNamespaceSelector` and `probeSelector` for selecting [VMProbe](./vmprobe.md) objects,
- `staticScrapeNamespaceSelector` and `staticScrapeSelector` for selecting [VMStaticScrape](./vmstaticscrape.md) objects,
- `nodeScrapeNamespaceSelector` and `nodeScrapeSelector` for selecting [VMNodeScrape](./vmnodescrape.md) objects.
It allows configuring objects 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 `VMAgent` spec and environment variable `WATCH_NAMESPACE` for operator.
Following rules are applied:
- If `*NamespaceSelector` and `*Selector` both undefined, then by default select nothing. With option set - `spec.selectAllByDefault: true`, select all objects of given type.
- If `*NamespaceSelector` defined, `*Selector` undefined, then all objects are matching at namespaces for given `*NamespaceSelector`.
- If `*NamespaceSelector` undefined, `*Selector` defined, then all objects at `VMAgent`'s namespaces are matching for given `*Selector`.
- If `*NamespaceSelector` and `*Selector` both defined, then only objects at namespaces matched `*NamespaceSelector` for given `*Selector` are matching.
Here's a more visual and more detailed view:
| `*NamespaceSelector` | `*Selector` | `selectAllByDefault` | `WATCH_NAMESPACE` | Selected objects |
|----------------------|-------------|----------------------|-------------------|-------------------------------------------------------------------------------------------------------|
| undefined | undefined | false | undefined | nothing |
| undefined | undefined | **true** | undefined | all objects of given type (`*`) in the cluster |
| **defined** | undefined | any | undefined | all objects of given type (`*`) at namespaces for given `*NamespaceSelector` |
| undefined | **defined** | any | undefined | all objects of given type (`*`) only at `VMAgent`'s namespace are matching for given `Selector |
| **defined** | **defined** | any | undefined | all objects of given type (`*`) only at namespaces matched `*NamespaceSelector` for given `*Selector` |
| any | undefined | any | **defined** | all objects of given type (`*`) only at `VMAgent`'s namespace |
| any | **defined** | any | **defined** | all objects of given type (`*`) only at `VMAgent`'s namespace for given `*Selector` |
More details about `WATCH_NAMESPACE` variable you can read in [this doc](../configuration.md#namespaced-mode).
Here are some examples of `VMAgent` configuration with selectors:
```yaml
# select all scrape objects in the cluster
apiVersion: operator.victoriametrics.com/v1beta1
kind: VMAgent
metadata:
name: vmagent-select-all
spec:
# ...
selectAllByDefault: true
---
# select all scrape objects in specific namespace (my-namespace)
apiVersion: operator.victoriametrics.com/v1beta1
kind: VMAgent
metadata:
name: vmagent-select-ns
spec:
# ...
serviceScrapeNamespaceSelector:
matchLabels:
kubernetes.io/metadata.name: my-namespace
podScrapeNamespaceSelector:
matchLabels:
kubernetes.io/metadata.name: my-namespace
nodeScrapeNamespaceSelector:
matchLabels:
kubernetes.io/metadata.name: my-namespace
staticScrapeNamespaceSelector:
matchLabels:
kubernetes.io/metadata.name: my-namespace
probeNamespaceSelector:
matchLabels:
kubernetes.io/metadata.name: my-namespace
```
## High availability
<!-- TODO: health checks -->
### Replication and deduplication
To run VMAgent in a highly available manner at first you have to configure deduplication in Victoria Metrics
according [this doc for VMSingle](https://docs.victoriametrics.com/Single-server-VictoriaMetrics.html#deduplication)
or [this doc for VMCluster](https://docs.victoriametrics.com/Cluster-VictoriaMetrics.html#deduplication).
You can do it with `extraArgs` on [`VMSingle`](./vmsingle.md):
```yaml
apiVersion: operator.victoriametrics.com/v1beta1
kind: VMSingle
metadata:
name: vmsingle-example
spec:
# ...
extraArgs:
dedup.minScrapeInterval: 30s
# ...
```
For [`VMCluster`](./vmcluster.md) you can do it with `vmstorage.extraArgs` and `vmselect.extraArgs`:
```yaml
apiVersion: operator.victoriametrics.com/v1beta1
kind: VMCluster
metadata:
name: vmcluster-example
spec:
# ...
vmselect:
extraArgs:
dedup.minScrapeInterval: 30s
# ...
vmstorage:
extraArgs:
dedup.minScrapeInterval: 30s
# ...
```
Deduplication is automatically enabled with `replicationFactor > 1` on `VMCLuster`.
After enabling deduplication you can increase replicas for VMAgent.
For instance, let's create `VMAgent` with 2 replicas:
```yaml
apiVersion: operator.victoriametrics.com/v1beta1
kind: VMAgent
metadata:
name: vmagent-ha-example
spec:
# ...
selectAllByDefault: true
vmAgentExternalLabelName: vmagent_ha
remoteWrite:
- url: "http://vmsingle-example.default.svc:8429/api/v1/write"
# Replication:
scrapeInterval: 30s
replicaCount: 2
# ...
```
Now, even if something happens to one of the vmagent, you'll still have the data.
### StatefulMode
VMAgent supports [persistent buffering](https://docs.victoriametrics.com/vmagent.html#replication-and-high-availability)
for sending data to remote storage. By default, operator set `-remoteWrite.tmpDataPath` for `VMAgent` to `/tmp` (that use k8s ephemeral storage)
and `VMAgent` loses state of the PersistentQueue on pod restarts.
In `StatefulMode` `VMAgent` doesn't lose state of the PersistentQueue (file-based buffer size for unsent data) on pod restarts.
Operator creates `StatefulSet` and, with provided `PersistentVolumeClaimTemplate` at `StatefulStorage` configuration param, metrics queue is stored on disk.
Example of configuration for `StatefulMode`:
```yaml
apiVersion: operator.victoriametrics.com/v1beta1
kind: VMAgent
metadata:
name: vmagent-ha-example
spec:
# ...
selectAllByDefault: true
vmAgentExternalLabelName: vmagent_ha
remoteWrite:
- url: "http://vmsingle-example.default.svc:8429/api/v1/write"
# Replication:
scrapeInterval: 30s
replicaCount: 2
# StatefulMode:
statefulMode: true
statefulStorage:
volumeClaimTemplate:
spec:
resources:
requests:
storage: 20Gi
# ...
```
### Sharding
Operator supports sharding with [cluster mode of vmagent](https://docs.victoriametrics.com/vmagent.html#scraping-big-number-of-targets)
for **scraping big number of targets**.
Sharding for `VMAgent` distributes scraping between multiple deployments of `VMAgent`.
Example usage (it is a complete example of `VMAgent` with high availability features):
```yaml
apiVersion: operator.victoriametrics.com/v1beta1
kind: VMAgent
metadata:
name: vmagent-ha-example
spec:
# ...
selectAllByDefault: true
vmAgentExternalLabelName: vmagent_ha
remoteWrite:
- url: "http://vmsingle-example.default.svc:8429/api/v1/write"
# Replication:
scrapeInterval: 30s
replicaCount: 2
# StatefulMode:
statefulMode: true
statefulStorage:
volumeClaimTemplate:
spec:
resources:
requests:
storage: 20Gi
# Sharding
shardCount: 5
affinity:
podAntiAffinity:
preferredDuringSchedulingIgnoredDuringExecution:
- podAffinityTerm:
labelSelector:
matchLabels:
shard-num: '%SHARD_NUM%'
topologyKey: kubernetes.io/hostname
# ...
```
This configuration produces `5` deployments with `2` replicas at each.
Each deployment has its own shard num and scrapes only `1/5` of all targets.
Also, you can use special placeholder `%SHARD_NUM%` in fields of `VMAgent` specification
and operator will replace it with current shard num of vmagent when creating deployment or statefullset for vmagent.
In the example above, the `%SHARD_NUM%` placeholder is used in the `podAntiAffinity` section,
which recommend to scheduler that pods with the same shard num (label `shard-num` in the pod template)
are not deployed on the same node. You can use another `topologyKey` for availability zone or region instead of nodes.
**Note** that at the moment operator doesn't use `-promscrape.cluster.replicationFactor` parameter of `VMAgent` and
creates `replicaCount` of replicas for each shard (which leads greater resource consumption).
This will be fixed in the future, more details can be seen in [this issue](https://github.com/VictoriaMetrics/operator/issues/604).
Also see [this example](https://github.com/VictoriaMetrics/operator/blob/master/config/examples/vmagent_stateful_with_sharding.yaml).
## Additional scrape configuration
AdditionalScrapeConfigs is an additional way to add scrape targets in `VMAgent` CRD.
There are two options for adding targets into `VMAgent`:
- [inline configuration into CRD](#inline-additional-scrape-configuration-in-vmagent-crd),
- [defining it as a Kubernetes Secret](#define-additional-scrape-configuration-as-a-kubernetes-secret).
No validation happens during the creation of configuration. However, you must validate job specs, and it must follow job spec configuration.
Please check [scrape_configs documentation](https://docs.victoriametrics.com/sd_configs.html#scrape_configs) as references.
### Inline Additional Scrape Configuration in VMAgent CRD
You need to add scrape configuration directly to the `vmagent spec.inlineScrapeConfig`. It is raw text in YAML format.
See example below
```yaml
apiVersion: operator.victoriametrics.com/v1beta1
kind: VMAgent
metadata:
name: vmagent-example
spec:
# ...
selectAllByDefault: true
inlineScrapeConfig: |
- job_name: "prometheus"
static_configs:
- targets: ["localhost:9090"]
remoteWrite:
- url: "http://vmsingle-example.default.svc:8429/api/v1/write"
# ...
```
**Note**: Do not use passwords and tokens with inlineScrapeConfig use Secret instead.
## Define Additional Scrape Configuration as a Kubernetes Secret
You need to define Kubernetes Secret with a key.
The key is `prometheus-additional.yaml` in the example below:
```yaml
apiVersion: v1
kind: Secret
metadata:
name: additional-scrape-configs
stringData:
prometheus-additional.yaml: |
- job_name: "prometheus"
static_configs:
- targets: ["localhost:9090"]
```
After that, you need to specify the secret's name and key in VMAgent CRD in `additionalScrapeConfigs` section:
```yaml
apiVersion: operator.victoriametrics.com/v1beta1
kind: VMAgent
metadata:
name: vmagent-example
spec:
# ...
selectAllByDefault: true
additionalScrapeConfigs:
name: additional-scrape-configs
key: prometheus-additional.yaml
remoteWrite:
- url: "http://vmsingle-example.default.svc:8429/api/v1/write"
# ...
```
**Note**: You can specify only one Secret in the VMAgent CRD configuration so use it for all additional scrape configurations.
## Relabeling
`VMAgent` supports global relabeling for all metrics and per remoteWrite target relabel config.
Note in some cases, you don't need relabeling, `key=value` label pairs can be added to the all scrapped metrics with `spec.externalLabels` for `VMAgent`:
```yaml
# simple label add config
apiVersion: operator.victoriametrics.com/v1beta1
kind: VMAgent
metadata:
name: vmagent-example
spec:
externalLabels:
clusterid: some_cluster
```
`VMAgent` CR supports relabeling with [custom configMap](#relabeling-config-in-configmap)
or [inline defined at CRD](#inline-relabeling-config).
### Relabeling config in Configmap
Quick tour how to create `ConfigMap` with relabeling configuration:
```yaml
apiVersion: v1
kind: ConfigMap
metadata:
name: vmagent-relabel
data:
global-relabel.yaml: |
- target_label: bar
- source_labels: [aa]
separator: "foobar"
regex: "foo.+bar"
target_label: aaa
replacement: "xxx"
- action: keep
source_labels: [aaa]
- action: drop
source_labels: [aaa]
target-1-relabel.yaml: |
- action: keep_if_equal
source_labels: [foo, bar]
- action: drop_if_equal
source_labels: [foo, bar]
```
Second, add `relabelConfig` to `VMagent` spec for global relabeling with name of `Configmap` - `vmagent-relabel` and key `global-relabel.yaml`.
For relabeling per remoteWrite target, add `urlRelabelConfig` name of `Configmap` - `vmagent-relabel`
and key `target-1-relabel.yaml` to one of remoteWrite target for relabeling only for those target:
```yaml
apiVersion: operator.victoriametrics.com/v1beta1
kind: VMAgent
metadata:
name: vmagent-example
spec:
# ...
selectAllByDefault: true
relabelConfig:
name: "vmagent-relabel"
key: "global-relabel.yaml"
remoteWrite:
- url: "http://vmsingle-example-vmsingle-persisted.default.svc:8429/api/v1/write"
- url: "http://vmsingle-example-vmsingle.default.svc:8429/api/v1/write"
urlRelabelConfig:
name: "vmagent-relabel"
key: "target-1-relabel.yaml"
```
### Inline relabeling config
```yaml
apiVersion: operator.victoriametrics.com/v1beta1
kind: VMAgent
metadata:
name: vmagent-example
spec:
# ...
selectAllByDefault: true
inlineRelabelConfig:
- target_label: bar
- source_labels: [aa]
separator: "foobar"
regex: "foo.+bar"
target_label: aaa
replacement: "xxx"
- action: keep
source_labels: [aaa]
- action: drop
source_labels: [aaa]
remoteWrite:
- url: "http://vmsingle-example-vmsingle-persisted.default.svc:8429/api/v1/write"
- url: "http://vmsingle-example-vmsingle.default.svc:8429/api/v1/write"
inlineUrlRelabelConfig:
- action: keep_if_equal
source_labels: [foo, bar]
- action: drop_if_equal
source_labels: [foo, bar]
```
### Combined example
It's also possible to use both features in combination.
First will be added relabeling configs from `inlineRelabelConfig`, then `relabelConfig` from configmap.
```yaml
apiVersion: v1
kind: ConfigMap
metadata:
name: vmagent-relabel
data:
global-relabel.yaml: |
- target_label: bar
- source_labels: [aa]
separator: "foobar"
regex: "foo.+bar"
target_label: aaa
replacement: "xxx"
- action: keep
source_labels: [aaa]
- action: drop
source_labels: [aaa]
target-1-relabel.yaml: |
- action: keep_if_equal
source_labels: [foo, bar]
- action: drop_if_equal
source_labels: [foo, bar]
```
```yaml
apiVersion: operator.victoriametrics.com/v1beta1
kind: VMAgent
metadata:
name: example-vmagent
spec:
# ...
selectAllByDefault: true
inlineRelabelConfig:
- target_label: bar1
- source_labels: [aa]
relabelConfig:
name: "vmagent-relabel"
key: "global-relabel.yaml"
remoteWrite:
- url: "http://vmsingle-example-vmsingle-persisted.default.svc:8429/api/v1/write"
- url: "http://vmsingle-example-vmsingle.default.svc:8429/api/v1/write"
urlRelabelConfig:
name: "vmagent-relabel"
key: "target-1-relabel.yaml"
inlineUrlRelabelConfig:
- action: keep_if_equal
source_labels: [foo1, bar2]
```
Resulted configmap, mounted to `VMAgent` pod:
```yaml
apiVersion: v1
data:
global_relabeling.yaml: |
- target_label: bar1
- source_labels:
- aa
- target_label: bar
- source_labels: [aa]
separator: "foobar"
regex: "foo.+bar"
target_label: aaa
replacement: "xxx"
- action: keep
source_labels: [aaa]
- action: drop
source_labels: [aaa]
url_rebaling-1.yaml: |
- source_labels:
- foo1
- bar2
action: keep_if_equal
- action: keep_if_equal
source_labels: [foo, bar]
- action: drop_if_equal
source_labels: [foo, bar]
kind: ConfigMap
metadata:
finalizers:
- apps.victoriametrics.com/finalizer
labels:
app.kubernetes.io/component: monitoring
app.kubernetes.io/instance: example-vmagent
app.kubernetes.io/name: vmagent
managed-by: vm-operator
name: relabelings-assets-vmagent-example-vmagent
namespace: default
ownerReferences:
- apiVersion: operator.victoriametrics.com/v1beta1
blockOwnerDeletion: true
controller: true
kind: VMAgent
name: example-vmagent
uid: 7e9fb838-65da-4443-a43b-c00cd6c4db5b
```
### Additional information
`VMAgent` also has some extra options for relabeling actions, you can check it [docs](https://docs.victoriametrics.com/vmagent#relabeling).
## Version management
To set `VMAgent` version add `spec.image.tag` name from [releases](https://github.com/VictoriaMetrics/VictoriaMetrics/releases)
```yaml
apiVersion: operator.victoriametrics.com/v1beta1
kind: VMAgent
metadata:
name: example-vmagent
spec:
image:
repository: victoriametrics/vmagent
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: VMAgent
metadata:
name: example-vmagent
spec:
image:
repository: victoriametrics/vmagent
tag: v1.93.4
pullPolicy: Always
imagePullSecrets:
- name: my-repo-secret
# ...
```
## Enterprise features
VMAgent supports feature [Kafka integration](https://docs.victoriametrics.com/vmagent.html#kafka-integration)
from [VictoriaMetrics Enterprise](https://docs.victoriametrics.com/enterprise.html#victoriametrics-enterprise).
For using Enterprise version of [vmagent](https://docs.victoriametrics.com/vmagent.html)
you need to change version of `vmagent` 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.html#victoriametrics-enterprise).
So you can use [extraArgs](./README.md#extra-arguments) for passing this flag to `VMAgent`:
After that you can pass [Kafka integration](https://docs.victoriametrics.com/vmagent.html#kafka-integration)
flags to `VMAgent` with [extraArgs](./README.md#extra-arguments).
### Reading metrics from Kafka
Here are complete example for [Reading metrics from Kafka](https://docs.victoriametrics.com/vmagent.html#reading-metrics-from-kafka):
```yaml
apiVersion: operator.victoriametrics.com/v1beta1
kind: VMAgent
metadata:
name: vmagent-ent-example
spec:
# enabling enterprise features
image:
# enterprise version of vmagent
tag: v1.93.5-enterprise
extraArgs:
# should be true and means that you have the legal right to run a vmagent 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 metrics from kafka
# more details about kafka integration you can read on https://docs.victoriametrics.com/vmagent.html#kafka-integration
# more details about these and other flags you can read on https://docs.victoriametrics.com/vmagent.html#command-line-flags-for-kafka-consumer
kafka.consumer.topic.brokers: localhost:9092
kafka.consumer.topic.format: influx
kafka.consumer.topic: metrics-by-telegraf
kafka.consumer.topic.groupID: some-id
# ...other fields...
```
### Writing metrics to Kafka
Here are complete example for [Writing metrics to Kafka](https://docs.victoriametrics.com/vmagent.html#writing-metrics-to-kafka):
```yaml
apiVersion: operator.victoriametrics.com/v1beta1
kind: VMAgent
metadata:
name: vmagent-ent-example
spec:
# enabling enterprise features
image:
# enterprise version of vmagent
tag: v1.93.5-enterprise
extraArgs:
# should be true and means that you have the legal right to run a vmagent 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: writing metrics to Kafka
# more details about kafka integration you can read on https://docs.victoriametrics.com/vmagent.html#kafka-integration
remoteWrite:
# sasl with username and password
- url: kafka://broker-1:9092/?topic=prom-rw-1&security.protocol=SASL_SSL&sasl.mechanisms=PLAIN
# it requires to create kubernetes secret `kafka-basic-auth` with keys `username` and `password` in the same namespace
basicAuth:
username:
name: kafka-basic-auth
key: username
password:
name: kafka-basic-auth
key: password
# sasl with username and password from secret and tls
- url: kafka://localhost:9092/?topic=prom-rw-2&security.protocol=SSL
# it requires to create kubernetes secret `kafka-tls` with keys `ca.pem`, `cert.pem` and `key.pem` in the same namespace
tlsConfig:
ca:
secret:
name: kafka-tls
key: ca.pem
cert:
secret:
name: kafka-tls
key: cert.pem
keySecret:
name: kafka-tls
key: key.pem
# ...other fields...
```
## Examples
```yaml
kind: VMAgent
metadata:
name: vmagent-example
spec:
selectAllByDefault: true
replicaCount: 1
scrapeInterval: 30s
scrapeTimeout: 10s
vmAgentExternalLabelName: example
externalLabels:
cluster: my-cluster
remoteWrite:
- url: "http://vmsingle-example.default.svc:8428/api/v1/write"
inlineRelabelConfig:
- action: labeldrop
regex: "temp.*"
```
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