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Victoria Metrics Operator

## Prerequisites

* Install the follow packages: ``git``, ``kubectl``, ``helm``, ``helm-docs``. See this [tutorial](../../REQUIREMENTS.md).
* PV support on underlying infrastructure.

## ArgoCD issues

When running operator using ArgoCD without Cert Manager (`.Values.admissionWebhooks.certManager.enabled: false`) it will rerender webhook certificates
on each sync since Helm `lookup` function is not respected by ArgoCD. To prevent this please update you operator Application `spec.syncPolicy` and `spec.ignoreDifferences` with a following:

```yaml
apiVersion: argoproj.io/v1alpha1
kind: Application
...
spec:
  ...
  syncPolicy:
    syncOptions:
    # https://argo-cd.readthedocs.io/en/stable/user-guide/sync-options/#respect-ignore-difference-configs
    # argocd must also ignore difference during apply stage
    # otherwise it ll silently override changes and cause a problem
    - RespectIgnoreDifferences=true
  ignoreDifferences:
    - group: ""
      kind: Secret
      name: <fullname>-validation
      namespace: kube-system
      jsonPointers:
        - /data
    - group: admissionregistration.k8s.io
      kind: ValidatingWebhookConfiguration
      name: <fullname>-admission
      jqPathExpressions:
      - '.webhooks[]?.clientConfig.caBundle'
```
where `<fullname>` is output of `{{ include "vm-operator.fullname" }}` for your setup

## Upgrade guide

 During release an issue with helm CRD was discovered. So for upgrade from version less then 0.1.3 you have to two options:
 1) use helm management for CRD, enabled by default.
 2) use own management system, need to add variable: --set createCRD=false.

If you choose helm management, following steps must be done before upgrade:

1) define namespace and helm release name variables

```
export NAMESPACE=default
export RELEASE_NAME=operator
```

execute kubectl commands:

```
kubectl get crd  | grep victoriametrics.com | awk '{print $1 }' | xargs -i kubectl label crd {} app.kubernetes.io/managed-by=Helm --overwrite
kubectl get crd  | grep victoriametrics.com | awk '{print $1 }' | xargs -i kubectl annotate crd {} meta.helm.sh/release-namespace="$NAMESPACE" meta.helm.sh/release-name="$RELEASE_NAME"  --overwrite
```

run helm upgrade command.

## Chart Details

This chart will do the following:

* Rollout victoria metrics operator

## How to install

Access a Kubernetes cluster.

### Setup chart repository (can be omitted for OCI repositories)

Add a chart helm repository with follow commands:

```console
helm repo add vm https://victoriametrics.github.io/helm-charts/

helm repo update
```
List versions of `vm/victoria-metrics-operator` chart available to installation:

```console
helm search repo vm/victoria-metrics-operator -l
```

### Install `victoria-metrics-operator` chart

Export default values of `victoria-metrics-operator` chart to file `values.yaml`:

  - For HTTPS repository

    ```console
    helm show values vm/victoria-metrics-operator > values.yaml
    ```
  - For OCI repository

    ```console
    helm show values oci://ghcr.io/victoriametrics/helm-charts/victoria-metrics-operator > values.yaml
    ```

Change the values according to the need of the environment in ``values.yaml`` file.

Test the installation with command:

  - For HTTPS repository

    ```console
    helm install vmo vm/victoria-metrics-operator -f values.yaml -n NAMESPACE --debug --dry-run
    ```

  - For OCI repository

    ```console
    helm install vmo oci://ghcr.io/victoriametrics/helm-charts/victoria-metrics-operator -f values.yaml -n NAMESPACE --debug --dry-run
    ```

Install chart with command:

  - For HTTPS repository

    ```console
    helm install vmo vm/victoria-metrics-operator -f values.yaml -n NAMESPACE
    ```

  - For OCI repository

    ```console
    helm install vmo oci://ghcr.io/victoriametrics/helm-charts/victoria-metrics-operator -f values.yaml -n NAMESPACE
    ```

Get the pods lists by running this commands:

```console
kubectl get pods -A | grep 'vmo'
```

Get the application by running this command:

```console
helm list -f vmo -n NAMESPACE
```

See the history of versions of `vmo` application with command.

```console
helm history vmo -n NAMESPACE
```

## Validation webhook

  Its possible to use validation of created resources with operator. For now, you need cert-manager to easily certificate management https://cert-manager.io/docs/

```yaml
admissionWebhooks:
  enabled: true
  # what to do in case, when operator not available to validate request.
  certManager:
    # enables cert creation and injection by cert-manager
    enabled: true
```

## How to uninstall

Remove application with command.

```console
helm uninstall vmo -n NAMESPACE
```

## Documentation of Helm Chart

Install ``helm-docs`` following the instructions on this [tutorial](../../REQUIREMENTS.md).

Generate docs with ``helm-docs`` command.

```bash
cd charts/victoria-metrics-operator

helm-docs
```

The markdown generation is entirely go template driven. The tool parses metadata from charts and generates a number of sub-templates that can be referenced in a template file (by default ``README.md.gotmpl``). If no template file is provided, the tool has a default internal template that will generate a reasonably formatted README.

## Parameters

The following tables lists the configurable parameters of the chart and their default values.

Change the values according to the need of the environment in ``victoria-metrics-operator/values.yaml`` file.

<table>
  <thead>
    <th>Key</th>
    <th>Type</th>
    <th>Default</th>
    <th>Description</th>
  </thead>
  <tbody>
    <tr>
      <td>admissionWebhooks</td>
      <td>object</td>
      <td><pre lang="plaintext">
certManager:
    enabled: false
    issuer: {}
enabled: true
enabledCRDValidation:
    vlogs: true
    vmagent: true
    vmalert: true
    vmalertmanager: true
    vmalertmanagerconfig: true
    vmauth: true
    vmcluster: true
    vmrule: true
    vmsingle: true
    vmuser: true
keepTLSSecret: true
policy: Fail
tls:
    caCert: null
    cert: null
    key: null
</pre>
</td>
      <td><p>Configures resource validation</p>
</td>
    </tr>
    <tr>
      <td>admissionWebhooks.certManager</td>
      <td>object</td>
      <td><pre lang="plaintext">
enabled: false
issuer: {}
</pre>
</td>
      <td><p>with keys: tls.key, tls.crt, ca.crt</p>
</td>
    </tr>
    <tr>
      <td>admissionWebhooks.certManager.enabled</td>
      <td>bool</td>
      <td><pre lang="">
false
</pre>
</td>
      <td><p>Enables cert creation and injection by cert-manager.</p>
</td>
    </tr>
    <tr>
      <td>admissionWebhooks.certManager.issuer</td>
      <td>object</td>
      <td><pre lang="plaintext">
{}
</pre>
</td>
      <td><p>If needed, provide own issuer. Operator will create self-signed if empty.</p>
</td>
    </tr>
    <tr>
      <td>admissionWebhooks.enabled</td>
      <td>bool</td>
      <td><pre lang="">
true
</pre>
</td>
      <td><p>Enables validation webhook.</p>
</td>
    </tr>
    <tr>
      <td>admissionWebhooks.policy</td>
      <td>string</td>
      <td><pre lang="">
Fail
</pre>
</td>
      <td><p>What to do in case, when operator not available to validate request.</p>
</td>
    </tr>
    <tr>
      <td>affinity</td>
      <td>object</td>
      <td><pre lang="plaintext">
{}
</pre>
</td>
      <td><p>Pod affinity</p>
</td>
    </tr>
    <tr>
      <td>annotations</td>
      <td>object</td>
      <td><pre lang="plaintext">
{}
</pre>
</td>
      <td><p>Annotations to be added to the all resources</p>
</td>
    </tr>
    <tr>
      <td>crd.cleanup.enabled</td>
      <td>bool</td>
      <td><pre lang="">
false
</pre>
</td>
      <td><p>Tells helm to clean up all the vm resources under this release&rsquo;s namespace when uninstalling</p>
</td>
    </tr>
    <tr>
      <td>crd.cleanup.image</td>
      <td>object</td>
      <td><pre lang="plaintext">
pullPolicy: IfNotPresent
repository: bitnami/kubectl
tag: ""
</pre>
</td>
      <td><p>Image configuration for CRD cleanup Job</p>
</td>
    </tr>
    <tr>
      <td>crd.create</td>
      <td>bool</td>
      <td><pre lang="">
true
</pre>
</td>
      <td><p>with this option, if you remove this chart, all crd resources will be deleted with it.</p>
</td>
    </tr>
    <tr>
      <td>env</td>
      <td>list</td>
      <td><pre lang="plaintext">
[]
</pre>
</td>
      <td><p>extra settings for the operator deployment. Full list <a href="https://docs.victoriametrics.com/operator/vars" target="_blank">here</a></p>
</td>
    </tr>
    <tr>
      <td>envFrom</td>
      <td>list</td>
      <td><pre lang="plaintext">
[]
</pre>
</td>
      <td></td>
    </tr>
    <tr>
      <td>extraArgs</td>
      <td>object</td>
      <td><pre lang="plaintext">
{}
</pre>
</td>
      <td><p>operator container additional commandline arguments</p>
</td>
    </tr>
    <tr>
      <td>extraContainers</td>
      <td>list</td>
      <td><pre lang="plaintext">
[]
</pre>
</td>
      <td></td>
    </tr>
    <tr>
      <td>extraHostPathMounts</td>
      <td>list</td>
      <td><pre lang="plaintext">
[]
</pre>
</td>
      <td><p>Additional hostPath mounts</p>
</td>
    </tr>
    <tr>
      <td>extraLabels</td>
      <td>object</td>
      <td><pre lang="plaintext">
{}
</pre>
</td>
      <td><p>Labels to be added to the all resources</p>
</td>
    </tr>
    <tr>
      <td>extraObjects</td>
      <td>list</td>
      <td><pre lang="plaintext">
[]
</pre>
</td>
      <td><p>Add extra specs dynamically to this chart</p>
</td>
    </tr>
    <tr>
      <td>extraVolumeMounts</td>
      <td>list</td>
      <td><pre lang="plaintext">
[]
</pre>
</td>
      <td><p>Extra Volume Mounts for the container</p>
</td>
    </tr>
    <tr>
      <td>extraVolumes</td>
      <td>list</td>
      <td><pre lang="plaintext">
[]
</pre>
</td>
      <td><p>Extra Volumes for the pod</p>
</td>
    </tr>
    <tr>
      <td>fullnameOverride</td>
      <td>string</td>
      <td><pre lang="">
""
</pre>
</td>
      <td><p>Overrides the full name of server component</p>
</td>
    </tr>
    <tr>
      <td>global.cluster.dnsDomain</td>
      <td>string</td>
      <td><pre lang="">
cluster.local
</pre>
</td>
      <td></td>
    </tr>
    <tr>
      <td>global.image.registry</td>
      <td>string</td>
      <td><pre lang="">
""
</pre>
</td>
      <td></td>
    </tr>
    <tr>
      <td>global.imagePullSecrets</td>
      <td>list</td>
      <td><pre lang="plaintext">
[]
</pre>
</td>
      <td></td>
    </tr>
    <tr>
      <td>image</td>
      <td>object</td>
      <td><pre lang="plaintext">
pullPolicy: IfNotPresent
registry: ""
repository: victoriametrics/operator
tag: ""
variant: ""
</pre>
</td>
      <td><p>operator image configuration</p>
</td>
    </tr>
    <tr>
      <td>image.pullPolicy</td>
      <td>string</td>
      <td><pre lang="">
IfNotPresent
</pre>
</td>
      <td><p>Image pull policy</p>
</td>
    </tr>
    <tr>
      <td>image.registry</td>
      <td>string</td>
      <td><pre lang="">
""
</pre>
</td>
      <td><p>Image registry</p>
</td>
    </tr>
    <tr>
      <td>image.repository</td>
      <td>string</td>
      <td><pre lang="">
victoriametrics/operator
</pre>
</td>
      <td><p>Image repository</p>
</td>
    </tr>
    <tr>
      <td>image.tag</td>
      <td>string</td>
      <td><pre lang="">
""
</pre>
</td>
      <td><p>Image tag override Chart.AppVersion</p>
</td>
    </tr>
    <tr>
      <td>imagePullSecrets</td>
      <td>list</td>
      <td><pre lang="plaintext">
[]
</pre>
</td>
      <td><p>Secret to pull images</p>
</td>
    </tr>
    <tr>
      <td>logLevel</td>
      <td>string</td>
      <td><pre lang="">
info
</pre>
</td>
      <td><p>possible values: info and error.</p>
</td>
    </tr>
    <tr>
      <td>nameOverride</td>
      <td>string</td>
      <td><pre lang="">
""
</pre>
</td>
      <td><p>VM operatror deployment name override</p>
</td>
    </tr>
    <tr>
      <td>nodeSelector</td>
      <td>object</td>
      <td><pre lang="plaintext">
{}
</pre>
</td>
      <td><p>Pod&rsquo;s node selector. Details are <a href="https://kubernetes.io/docs/user-guide/node-selection/" target="_blank">here</a></p>
</td>
    </tr>
    <tr>
      <td>operator.disable_prometheus_converter</td>
      <td>bool</td>
      <td><pre lang="">
false
</pre>
</td>
      <td><p>By default, operator converts prometheus-operator objects.</p>
</td>
    </tr>
    <tr>
      <td>operator.enable_converter_ownership</td>
      <td>bool</td>
      <td><pre lang="">
false
</pre>
</td>
      <td><p>Enables ownership reference for converted prometheus-operator objects, it will remove corresponding victoria-metrics objects in case of deletion prometheus one.</p>
</td>
    </tr>
    <tr>
      <td>operator.prometheus_converter_add_argocd_ignore_annotations</td>
      <td>bool</td>
      <td><pre lang="">
false
</pre>
</td>
      <td><p>Compare-options and sync-options for prometheus objects converted by operator for properly use with ArgoCD</p>
</td>
    </tr>
    <tr>
      <td>operator.useCustomConfigReloader</td>
      <td>bool</td>
      <td><pre lang="">
false
</pre>
</td>
      <td><p>Enables custom config-reloader, bundled with operator. It should reduce  vmagent and vmauth config sync-time and make it predictable.</p>
</td>
    </tr>
    <tr>
      <td>podDisruptionBudget</td>
      <td>object</td>
      <td><pre lang="plaintext">
enabled: false
labels: {}
</pre>
</td>
      <td><p>See <code>kubectl explain poddisruptionbudget.spec</code> for more or check <a href="https://kubernetes.io/docs/tasks/run-application/configure-pdb/" target="_blank">these docs</a></p>
</td>
    </tr>
    <tr>
      <td>podLabels</td>
      <td>object</td>
      <td><pre lang="plaintext">
{}
</pre>
</td>
      <td></td>
    </tr>
    <tr>
      <td>podSecurityContext</td>
      <td>object</td>
      <td><pre lang="plaintext">
{}
</pre>
</td>
      <td></td>
    </tr>
    <tr>
      <td>probe.liveness</td>
      <td>object</td>
      <td><pre lang="plaintext">
failureThreshold: 3
initialDelaySeconds: 5
periodSeconds: 15
tcpSocket:
    port: probe
timeoutSeconds: 5
</pre>
</td>
      <td><p>Liveness probe</p>
</td>
    </tr>
    <tr>
      <td>probe.readiness</td>
      <td>object</td>
      <td><pre lang="plaintext">
failureThreshold: 3
httpGet:
    port: probe
initialDelaySeconds: 5
periodSeconds: 15
timeoutSeconds: 5
</pre>
</td>
      <td><p>Readiness probe</p>
</td>
    </tr>
    <tr>
      <td>probe.startup</td>
      <td>object</td>
      <td><pre lang="plaintext">
{}
</pre>
</td>
      <td><p>Startup probe</p>
</td>
    </tr>
    <tr>
      <td>rbac.aggregatedClusterRoles</td>
      <td>object</td>
      <td><pre lang="plaintext">
enabled: true
labels:
    admin:
        rbac.authorization.k8s.io/aggregate-to-admin: "true"
    view:
        rbac.authorization.k8s.io/aggregate-to-view: "true"
</pre>
</td>
      <td><p>create aggregated clusterRoles for CRD readonly and admin permissions</p>
</td>
    </tr>
    <tr>
      <td>rbac.aggregatedClusterRoles.labels</td>
      <td>object</td>
      <td><pre lang="plaintext">
admin:
    rbac.authorization.k8s.io/aggregate-to-admin: "true"
view:
    rbac.authorization.k8s.io/aggregate-to-view: "true"
</pre>
</td>
      <td><p>labels attached to according clusterRole</p>
</td>
    </tr>
    <tr>
      <td>rbac.create</td>
      <td>bool</td>
      <td><pre lang="">
true
</pre>
</td>
      <td><p>Specifies whether the RBAC resources should be created</p>
</td>
    </tr>
    <tr>
      <td>replicaCount</td>
      <td>int</td>
      <td><pre lang="">
1
</pre>
</td>
      <td></td>
    </tr>
    <tr>
      <td>resources</td>
      <td>object</td>
      <td><pre lang="plaintext">
{}
</pre>
</td>
      <td><p>Resource object</p>
</td>
    </tr>
    <tr>
      <td>securityContext</td>
      <td>object</td>
      <td><pre lang="plaintext">
{}
</pre>
</td>
      <td></td>
    </tr>
    <tr>
      <td>service.annotations</td>
      <td>object</td>
      <td><pre lang="plaintext">
{}
</pre>
</td>
      <td></td>
    </tr>
    <tr>
      <td>service.clusterIP</td>
      <td>string</td>
      <td><pre lang="">
""
</pre>
</td>
      <td></td>
    </tr>
    <tr>
      <td>service.externalIPs</td>
      <td>string</td>
      <td><pre lang="">
""
</pre>
</td>
      <td></td>
    </tr>
    <tr>
      <td>service.externalTrafficPolicy</td>
      <td>string</td>
      <td><pre lang="">
""
</pre>
</td>
      <td></td>
    </tr>
    <tr>
      <td>service.healthCheckNodePort</td>
      <td>string</td>
      <td><pre lang="">
""
</pre>
</td>
      <td></td>
    </tr>
    <tr>
      <td>service.ipFamilies</td>
      <td>list</td>
      <td><pre lang="plaintext">
[]
</pre>
</td>
      <td></td>
    </tr>
    <tr>
      <td>service.ipFamilyPolicy</td>
      <td>string</td>
      <td><pre lang="">
""
</pre>
</td>
      <td></td>
    </tr>
    <tr>
      <td>service.labels</td>
      <td>object</td>
      <td><pre lang="plaintext">
{}
</pre>
</td>
      <td></td>
    </tr>
    <tr>
      <td>service.loadBalancerIP</td>
      <td>string</td>
      <td><pre lang="">
""
</pre>
</td>
      <td></td>
    </tr>
    <tr>
      <td>service.loadBalancerSourceRanges</td>
      <td>list</td>
      <td><pre lang="plaintext">
[]
</pre>
</td>
      <td></td>
    </tr>
    <tr>
      <td>service.servicePort</td>
      <td>int</td>
      <td><pre lang="">
8080
</pre>
</td>
      <td></td>
    </tr>
    <tr>
      <td>service.type</td>
      <td>string</td>
      <td><pre lang="">
ClusterIP
</pre>
</td>
      <td></td>
    </tr>
    <tr>
      <td>service.webhookPort</td>
      <td>int</td>
      <td><pre lang="">
9443
</pre>
</td>
      <td></td>
    </tr>
    <tr>
      <td>serviceAccount.create</td>
      <td>bool</td>
      <td><pre lang="">
true
</pre>
</td>
      <td><p>Specifies whether a service account should be created</p>
</td>
    </tr>
    <tr>
      <td>serviceAccount.name</td>
      <td>string</td>
      <td><pre lang="">
""
</pre>
</td>
      <td><p>The name of the service account to use. If not set and create is true, a name is generated using the fullname template</p>
</td>
    </tr>
    <tr>
      <td>serviceMonitor</td>
      <td>object</td>
      <td><pre lang="plaintext">
annotations: {}
basicAuth: {}
enabled: false
extraLabels: {}
interval: ""
relabelings: []
scheme: ""
scrapeTimeout: ""
tlsConfig: {}
</pre>
</td>
      <td><p>configures monitoring with serviceScrape. VMServiceScrape must be pre-installed</p>
</td>
    </tr>
    <tr>
      <td>tolerations</td>
      <td>list</td>
      <td><pre lang="plaintext">
[]
</pre>
</td>
      <td><p>Array of tolerations object. Spec is <a href="https://kubernetes.io/docs/concepts/configuration/assign-pod-node/" target="_blank">here</a></p>
</td>
    </tr>
    <tr>
      <td>topologySpreadConstraints</td>
      <td>list</td>
      <td><pre lang="plaintext">
[]
</pre>
</td>
      <td><p>Pod Topology Spread Constraints. Spec is <a href="https://kubernetes.io/docs/concepts/scheduling-eviction/topology-spread-constraints/" target="_blank">here</a></p>
</td>
    </tr>
    <tr>
      <td>watchNamespaces</td>
      <td>list</td>
      <td><pre lang="plaintext">
[]
</pre>
</td>
      <td><p>By default, the operator will watch all the namespaces If you want to override this behavior, specify the namespace. Operator supports multiple namespaces for watching.</p>
</td>
    </tr>
  </tbody>
</table>