<!--- app-name: Wavefront Adapter for Istio -->

# Wavefront Adapter for Istio packaged by Bitnami

Wavefront Adapter for Istio is an adapter for Istio to expose Istio metrics to Wavefront. It is a lightweight tool written in Go. It supports Istio v1.4+ and Kubernetes v1.15+.

[Overview of Wavefront Adapter for Istio](https://github.com/vmware/wavefront-adapter-for-istio)


                           
## TL;DR

```console
$ helm repo add bitnami https://charts.bitnami.com/bitnami
$ helm install my-release bitnami/wavefront-adapter-for-istio
```

## Introduction
Bitnami charts for Helm are carefully engineered, actively maintained and are the quickest and easiest way to deploy containers on a Kubernetes cluster that are ready to handle production workloads.

This will deploy a [Wavefront Adapter for Istio](https://github.com/vmware/wavefront-adapter-for-istio/) Deployment in a [Kubernetes](https://kubernetes.io) cluster using the [Helm](https://helm.sh) package manager.

Bitnami charts can be used with [Kubeapps](https://kubeapps.com/) for deployment and management of Helm Charts in clusters. This Helm chart has been tested on top of [Bitnami Kubernetes Production Runtime](https://kubeprod.io/) (BKPR). Deploy BKPR to get automated TLS certificates, logging and monitoring for your applications.

## Prerequisites

- Kubernetes 1.19+
- Helm 3.2.0+
- Istio v1.4, v1.5 and v1.6 with `Mixer` support

In order to enable the `Mixer` in Istio versions starting from v1.5, execute the following commands:

##### Istio v1.5.x
```console
istioctl manifest apply --set values.prometheus.enabled=true --set values.telemetry.v1.enabled=true --set values.telemetry.v2.enabled=false --set components.citadel.enabled=true --set components.telemetry.enabled=true
```

##### Istio v1.6.x
```console
istioctl install --set values.prometheus.enabled=true --set values.telemetry.v1.enabled=true --set values.telemetry.v2.enabled=false --set components.citadel.enabled=true --set components.telemetry.enabled=true
```

## Installing the Chart

To install the chart with the release name `my-release`:

```console
$ helm repo add bitnami https://charts.bitnami.com/bitnami
$ helm install my-release bitnami/wavefront-adapter-for-istio
```

These commands deploy wavefront-adapter-for-istio on the Kubernetes cluster in the default configuration. The [Parameters](#parameters) section lists the parameters that can be configured during installation.

> **Tip**: List all releases using `helm list`

## Uninstalling the Chart

To uninstall/delete the `my-release` helm release:

```console
$ helm uninstall my-release
```

The command removes all the Kubernetes components associated with the chart and deletes the release.

## Parameters

### Global parameters

| Name                      | Description                                        | Value           |
| ------------------------- | -------------------------------------------------- | --------------- |
| `global.imageRegistry`    | Global Docker image registry                       | `""`            |
| `global.imagePullSecrets` | Global Docker registry secret names as an array    | `[]`            |
| `global.storageClass`     | Global StorageClass for Persistent Volume(s)       | `""`            |
| `kubeVersion`             | Override Kubernetes version                        | `""`            |
| `nameOverride`            | String to partially override common.names.fullname | `""`            |
| `fullnameOverride`        | String to fully override common.names.fullname     | `""`            |
| `commonLabels`            | Labels to add to all deployed objects              | `{}`            |
| `commonAnnotations`       | Annotations to add to all deployed objects         | `{}`            |
| `clusterDomain`           | Kubernetes cluster domain name                     | `cluster.local` |
| `extraDeploy`             | Array of extra objects to deploy with the release  | `[]`            |


### Wavefront Adapter for Istio deployment parameters

| Name                                    | Description                                                                               | Value                                 |
| --------------------------------------- | ----------------------------------------------------------------------------------------- | ------------------------------------- |
| `image.registry`                        | Adapter image registry                                                                    | `docker.io`                           |
| `image.repository`                      | Adapter image repository                                                                  | `bitnami/wavefront-adapter-for-istio` |
| `image.tag`                             | Adapter image tag (immutabe tags are recommended)                                         | `0.1.5-debian-10-r273`                |
| `image.pullPolicy`                      | Adapter image pull policy                                                                 | `IfNotPresent`                        |
| `image.pullSecrets`                     | Adapter image pull secrets                                                                | `[]`                                  |
| `image.debug`                           | Enable image debug mode                                                                   | `false`                               |
| `livenessProbe.enabled`                 | Enable livenessProbe                                                                      | `true`                                |
| `livenessProbe.initialDelaySeconds`     | Initial delay seconds for livenessProbe                                                   | `10`                                  |
| `livenessProbe.periodSeconds`           | Period seconds for livenessProbe                                                          | `10`                                  |
| `livenessProbe.timeoutSeconds`          | Timeout seconds for livenessProbe                                                         | `1`                                   |
| `livenessProbe.failureThreshold`        | Failure threshold for livenessProbe                                                       | `3`                                   |
| `livenessProbe.successThreshold`        | Success threshold for livenessProbe                                                       | `1`                                   |
| `readinessProbe.enabled`                | Enable readinessProbe                                                                     | `true`                                |
| `readinessProbe.initialDelaySeconds`    | Initial delay seconds for readinessProbe                                                  | `10`                                  |
| `readinessProbe.periodSeconds`          | Period seconds for readinessProbe                                                         | `10`                                  |
| `readinessProbe.timeoutSeconds`         | Timeout seconds for readinessProbe                                                        | `1`                                   |
| `readinessProbe.failureThreshold`       | Failure threshold for readinessProbe                                                      | `3`                                   |
| `readinessProbe.successThreshold`       | Success threshold for readinessProbe                                                      | `1`                                   |
| `command`                               | Override default container command (useful when using custom images)                      | `[]`                                  |
| `args`                                  | Override default container args (useful when using custom images)                         | `[]`                                  |
| `hostAliases`                           | Add deployment host aliases                                                               | `[]`                                  |
| `resources.limits`                      | The resources limits for the Adapter container                                            | `{}`                                  |
| `resources.requests`                    | The requested resourcesc for the Adapter container                                        | `{}`                                  |
| `containerSecurityContext.enabled`      | Enabled Adapter containers' Security Context                                              | `true`                                |
| `containerSecurityContext.runAsUser`    | Set Adapter container's Security Context runAsUser                                        | `1001`                                |
| `containerSecurityContext.runAsNonRoot` | Set Adapter container's Security Context runAsNonRoot                                     | `true`                                |
| `podSecurityContext.enabled`            | Enabled Adapter pods' Security Context                                                    | `true`                                |
| `podSecurityContext.fsGroup`            | Set Adapter pod's Security Context fsGroup                                                | `1001`                                |
| `podAffinityPreset`                     | Pod affinity preset. Ignored if `affinity` is set. Allowed values: `soft` or `hard`       | `""`                                  |
| `podAntiAffinityPreset`                 | Pod anti-affinity preset. Ignored if `affinity` is set. Allowed values: `soft` or `hard`  | `soft`                                |
| `nodeAffinityPreset.type`               | Node affinity preset type. Ignored if `affinity` is set. Allowed values: `soft` or `hard` | `""`                                  |
| `nodeAffinityPreset.key`                | Node label key to match. Ignored if `affinity` is set                                     | `""`                                  |
| `nodeAffinityPreset.values`             | Node label values to match. Ignored if `affinity` is set                                  | `[]`                                  |
| `affinity`                              | Affinity for pod assignment                                                               | `{}`                                  |
| `nodeSelector`                          | Node labels for pod assignment                                                            | `{}`                                  |
| `tolerations`                           | Tolerations for pod assignment                                                            | `[]`                                  |
| `podLabels`                             | Extra labels for Adapter pods                                                             | `{}`                                  |
| `priorityClassName`                     | Adapter pod priority                                                                      | `""`                                  |
| `lifecycleHooks`                        | Add lifecycle hooks to the Adapter deployment                                             | `{}`                                  |
| `customLivenessProbe`                   | Override default liveness probe                                                           | `{}`                                  |
| `customReadinessProbe`                  | Override default readiness probe                                                          | `{}`                                  |
| `updateStrategy.type`                   | Adapter deployment update strategy                                                        | `RollingUpdate`                       |
| `containerPort`                         | Adapter container port                                                                    | `8000`                                |
| `extraEnvVars`                          | Add extra environment variables to the Adapter container                                  | `[]`                                  |
| `extraEnvVarsCM`                        | Name of existing ConfigMap containing extra env vars                                      | `""`                                  |
| `extraEnvVarsSecret`                    | Name of existing Secret containing extra env vars                                         | `""`                                  |
| `extraVolumes`                          | Optionally specify extra list of additional volumes for Adapter pods                      | `[]`                                  |
| `extraVolumeMounts`                     | Optionally specify extra list of additional volumeMounts for Adapter container(s)         | `[]`                                  |
| `initContainers`                        | Add additional init containers to the Adapter pods                                        | `[]`                                  |
| `sidecars`                              | Add additional sidecar containers to the Adapter pod                                      | `[]`                                  |
| `externalProxy.host`                    | Host of a wavefront-proxy instance (required if wavefront.enabled = false)                | `""`                                  |
| `externalProxy.port`                    | Host of a wavefront-proxy instance (required if wavefront.enabled = false)                | `2878`                                |
| `adapterLogLevel`                       | Adapter log level                                                                         | `info`                                |
| `istio.create`                          | Deploy istio objects                                                                      | `true`                                |
| `istio.namespace`                       | Namespace to deploy the Istio objects                                                     | `istio-system`                        |
| `istio.apiVersion`                      | Override Istio API version                                                                | `""`                                  |
| `metrics.flushInterval`                 | Interval to flush the metrics                                                             | `5s`                                  |
| `metrics.source`                        | Source tag for all metrics handled by the adapter                                         | `istio`                               |
| `metrics.prefix`                        | Prefix to prepend to all metrics handled by the adapter                                   | `istio`                               |
| `metrics.http`                          | Enable the collection of http metrics                                                     | `true`                                |
| `metrics.tcp`                           | Enable the collection of tcp metrics                                                      | `true`                                |


### Traffic Exposure Parameters

| Name                               | Description                                  | Value       |
| ---------------------------------- | -------------------------------------------- | ----------- |
| `service.type`                     | Adapter service type                         | `ClusterIP` |
| `service.port`                     | Adapter service port                         | `8000`      |
| `service.loadBalancerIP`           | Adapter service LoadBalancer IP              | `""`        |
| `service.loadBalancerSourceRanges` | loadBalancerIP source ranges for the Service | `[]`        |
| `service.nodePorts.http`           | NodePort for the HTTP endpoint               | `""`        |
| `service.externalTrafficPolicy`    | External traffic policy for the service      | `Cluster`   |


### Wavefront sub-chart parameters

| Name                              | Description                                                                               | Value                                |
| --------------------------------- | ----------------------------------------------------------------------------------------- | ------------------------------------ |
| `wavefront.enabled`               | Deploy Wavefront chart (necessary if externalProxyHost is not set)                        | `true`                               |
| `wavefront.wavefront.url`         | Wavefront SAAS service URL                                                                | `https://YOUR_CLUSTER.wavefront.com` |
| `wavefront.wavefront.token`       | Wavefront SAAS token                                                                      | `YOUR_API_TOKEN`                     |
| `wavefront.collector.enabled`     | Deploy Wavefront collector (not used by the Adapter pod)                                  | `false`                              |
| `wavefront.rbac.create`           | Create RBAC rules (not necessary as the Adapter only uses wavefront-proxy)                | `false`                              |
| `wavefront.proxy.enabled`         | Deploy Wavefront Proxy (required if externalProxyHost is not set)                         | `true`                               |
| `wavefront.proxy.port`            | Deployed Wavefront Proxy port (required if externalProxyHost is not set)                  | `2878`                               |
| `wavefront.serviceAccount.create` | Create Wavefront serivce account (not necessary as the Adapter only uses wavefront-proxy) | `false`                              |


Specify each parameter using the `--set key=value[,key=value]` argument to `helm install`. For example,

```console
$ helm install my-release \
  --set livenessProbe.successThreshold=5 \
    bitnami/wavefront-adapter-for-istio
```

The above command sets the `livenessProbe.successThreshold` to `5`.

Alternatively, a YAML file that specifies the values for the parameters can be provided while installing the chart. For example,

```bash
$ helm install my-release -f values.yaml bitnami/wavefront-adapter-for-istio
```

## Configuration and installation details

### [Rolling vs Immutable tags](https://docs.bitnami.com/containers/how-to/understand-rolling-tags-containers/)

It is strongly recommended to use immutable tags in a production environment. This ensures your deployment does not change automatically if the same tag is updated with a different image.

Bitnami will release a new chart updating its containers if a new version of the main container, significant changes, or critical vulnerabilities exist.

### Connect to Wavefront

The Wavefront Adapter for Istio chart needs to be connected to a Wavefront instance. This can be done in three different ways:

- Deploying the Wavefront subchart, using only the Wavefront Proxy component (default behavior): This is done by setting `wavefront.enabled=true` and `wavefront.proxy.enabled=true`, but leaving the `externalProxy.host` value unset. We recommend disabling the rest of the Wavefront sub-chart resources as they would not be used by the Prometheus Storage Adapter. You also need to configure the Wavefront SaaS URL and token using the `wavefont.wavefront.url` and `wavefront.wavefront.token` parameters.

- Using an external Wavefront Proxy instance: This is done by setting the `externalProxy.host` and `externalProxy.port` values. In this case, you should set the `wavefront.enabled` value to `false`. You also need to configure the Wavefront SaaS URL and token using the `wavefront.wavefront.url` and `wavefront.wavefront.token` parameters.

- Use direct ingestion without a Wavefront Proxy instance. This is done by not setting the `externalProxy` values and setting the `wavefront.enabled` value to false.

Refer to the [chart documentation for more detailed configuration examples](https://docs.bitnami.com/kubernetes/apps/wavefront-adapter-for-istio/get-started/configure-connection/).

## Troubleshooting

Find more information about how to deal with common errors related to Bitnami's Helm charts in [this troubleshooting guide](https://docs.bitnami.com/general/how-to/troubleshoot-helm-chart-issues).

## Upgrading

```bash
$ helm upgrade my-release bitnami/wavefront-adapter-for-istio
```

### To 1.0.0

This major updates the wavefront subchart to it newest major, 3.0.0, which contains a new major for kube-state-metrics. For more information on this subchart's major, please refer to [wavefront upgrade notes](https://github.com/bitnami/charts/tree/master/bitnami/wavefront#to-300).

## License

Copyright &copy; 2022 Bitnami

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.