Charts: [stable/prometheus-operator] deployed grafana is missing grafana-piechart-panel plugin

[torlenor]

Describe the bug
The deployed Grafana is missing the plugin grafana-piechart-panel plugin which is used in Networking related dashboards.

Version of Helm and Kubernetes:

$ helm version version.BuildInfo{Version:"v3.0.2", GitCommit:"19e47ee3283ae98139d98460de796c1be1e3975f", GitTreeState:"clean", GoVersion:"go1.13.5"}

Kubernetes: 1.16.3-00

Which chart:
[stable/prometheus-operator]

What happened:
Grafana Plugin is missing.

What you expected to happen:
Plugin to be included for all delivered Grafana dashboards.

How to reproduce it (as minimally and precisely as possible):

1. Deploy the chart (helm install --name my-release stable/prometheus-operator)
2. Use a web browser to go to the freshly deployed Grafana instance
3. Navigate to the, e.g., Kubernetes / Networking / Workload dashboard

[s2504s]

Hi all!
We faced this issue too
Does somebody know/have some work around for this issue?

[SergeSpinoza]

Hi. I have the same issue.
Kubernetes: 1.16.3
Helm version: 3.0.0

[pnduati]

@s2504s @SergeSpinoza You need to install the plugin. To install the plugin, pass the plugins you want installed as a comma separated string in the values.yaml file.
plugins: "grafana-piechart-panel"

[s2504s]

@SergeSpinoza Yea, you are right. That is a list
I've set up grafana as part of prometheus-operator and this parameter in my values file looks like :

grafana:
  enabled: true
  plugins:
    - grafana-piechart-panel
.....

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