#556: Adds example GrafanaDatasource for postgres

[Voigtus]

Description

Adds an example to use a postgres DB as GrafanaDatasource

Relevant issues/tickets

#556

Type of change

• Enhancement: adds new example for Datasource
• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)

Verification steps

• Spin up any Kubernetes Distribution
• Install and deploy Operator & CRD
• Add example Grafana Instance
  • kubectl apply -n grafana-operator-system -f Grafana.yaml
• Deploy Postgres to Kubernetes cluster

apiVersion: v1
kind: ConfigMap
metadata:
  name: postgres-config
  labels:
    app: postgres
data:
  POSTGRES_DB: postgresdb
  POSTGRES_USER: postgresadmin
  POSTGRES_PASSWORD: admin123
---
apiVersion: apps/v1
kind: Deployment
metadata:
  name: postgres
spec:
  replicas: 1
  selector:
    matchLabels:
      app: postgres
  template:
    metadata:
      labels:
        app: postgres
    spec:
      containers:
      - name: postgres
        image: postgres:11
        imagePullPolicy: IfNotPresent
        ports:
          - containerPort: 5432
        envFrom:
          - configMapRef:
              name: postgres-config
---
apiVersion: v1
kind: Service
metadata:
  name: postgres
  labels:
    app: postgres
spec:
  type: ClusterIP
  ports:
   - port: 5432
  selector:
   app: postgres

• Restore DB by using this "tutorial" https://www.postgresqltutorial.com/load-postgresql-sample-database/
• Apply example GrafanaDatasource in this PR
  • kubectl apply -n grafana-operator-system -f Postgres.yaml
• Login to Grafana and use Datasource

[NissesSenap]

Minor comment.
Thanks allot @Voigtus keep up the good work!

[NissesSenap]

Silly thing but I know I will think about it in the future. Trying to add \n at the end of all our yaml files.
It's on my todo to add a CI rule for this.
Other then that I think it looks great

[Voigtus]

Will do.
On further notice: Would it be a possibility to add an .editorconfig file to the repo?
It would be insured, that something like this might not happen as easily again.

[NissesSenap]

There have been talk about editorconfig before #516 if you want to take a look at it again please do.

[hubeadmin]

@NissesSenap I force-pushed the change, can you approve?

[hubeadmin]

Thanks for adding this @Voigtus 👍

[krzwiatrzyk]

It seems that is example got lost and is not available anymore in the repo?

[NissesSenap]

@krzwiatrzyk it's in the v4 branch. But we would love a PR with a v5 version.

[krzwiatrzyk]

I made it work, just change datasources (list) to datasource (object) and add an access: proxy field (Grafana was rejecting datasource without it)

[NissesSenap]

Great @krzwiatrzyk , we would love a PR with an example

[krzwiatrzyk]

Here #1076