Expose Kibana configuration

[nkvoll]

It should be possible to configure custom Kibana settings

[nkvoll]

Example CRD sample:

# This sample sets up a single Kibana instance pointing to a remote Elasticsearch cluster
apiVersion: kibana.k8s.elastic.co/v1alpha1
kind: Kibana
metadata:
  labels:
    controller-tools.k8s.io: "1.0"
  name: kibana-sample
spec:
  version: "6.7.0"

  # association format TBD:
  elasticsearch:
    inCluster:
      name: <name of es resource>
      namespace: <namespace of es resource>


  # exposing the config:
  config:
    elasticsearch:
      url: https://url.to.elasticsearch:9200
      username: ...
      password: ... <should be done via kibana-keystore>

      # provide a defaulted "secrets" mount
      ssl.cert: config/secrets/elasticsearch.http.cert.pem
      ssl.certificate_verification_mode: certificate

  podTemplate:
    spec:
      affinity: ...

      containers:
      - name: kibana
        resources:
          limits:
            memory: 1Gi
            cpu: 1000m
        volumeMounts:
        - name: my-certs
          mountPath: /usr/share/kibana/config/my-certs

      volumes:
      - name: my-certs
        secret:
          secretName: my-certs

  nodeCount: 1

  http:
    service:
      metadata:
        annotations:
          service.beta.kubernetes.io/aws-load-balancer-connection-idle-timeout: "60"
      spec:
        # supports automatically creating a LoadBalancer for the HTTP endpoints.
        type: LoadBalancer
    # tls settings for Kibana:
    tls:
      selfSignedCertificate:
        # subjectAlternativeNames allows providing a custom set of alternative names the certificate should contain.
        subjectAlternativeNames:
          - dns: foo.example.com
          - ip: 4.3.2.1

[djschny]

Excuse my ignorance, but why not just mirror the way this is handled in the Kibana docker image today where env is provided in the pod template?

For example:

  podTemplate:                                                                                                                                                                                                        
    metadata:                                                                                                                                                                                                         
      labels:                                                                                                                                                                                                         
        app: kibana                                                                                                                                                                                                   
        function: logging                                                                                                                                                                                             
    spec:                                                                                                                                                                                                             
      containers:                                                                                                                                                                                                     
      - name: kibana                                                                                                                                                                                                  
        env:                                                                                                                                                                                                          
          - name: SERVER_BASEPATH                                                                                                                                                                                     
            value: /kibana 

[nkvoll]

@djschny We'll be supporting that as well (we already do in master), but we also want to provide people with the flexibility of specifying the contents of their kibana.yml file as well. Some would also argue that it's a bit more of a convenient format than having to translate settings to the environment-equivalent.