# Helm Chart For Victoria Metrics Operator.

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# Prerequisites

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

* PV support on underlying infrastructure.

# 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.

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:

##### for helm v3

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

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

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

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

Test the installation with command:

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

Install chart with command:

##### for helm v3

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

Get the pods lists by running this commands:

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

Get the application by running this command:

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

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

```console
helm history vmoperator -n NAMESPACE
```

# How to uninstall

Remove application with command.

```console
helm uninstall vmoperator -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
```

# 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.

{{ template "chart.valuesTable" . }}