You can connect an Elasticsearch cluster that is either managed by ECK or not managed by ECK.
It is quite straightforward to connect a Kibana instance to an Elasticsearch cluster managed by ECK:
apiVersion: kibana.k8s.elastic.co/v1 kind: Kibana metadata: name: quickstart spec: version: 8.2.0 count: 1 elasticsearchRef: name: quickstart namespace: default
The use of
namespace is optional if the Elasticsearch cluster is running in the same namespace as Kibana.
Any Kibana can reference (and thus access) any Elasticsearch instance as long as they are both in namespaces that are watched by the same ECK instance. ECK will copy the required Secret from Elasticsearch to Kibana namespace. Kibana cannot automatically connect to Elasticsearch (through
elasticsearchRef) in a namespace managed by a different ECK instance. For more information, see Restrict cross-namespace resource associations.
The Kibana configuration file is automatically setup by ECK to establish a secure connection to Elasticsearch.
You can also configure Kibana to connect to an Elasticsearch cluster that is managed by a different installation of ECK, or runs outside the Kubernetes cluster. In this case, you need the IP address or URL of the Elasticsearch cluster and a valid username and password pair to access the cluster.
Use the secure settings mechanism to securely store the credentials of the external Elasticsearch cluster:
kubectl create secret generic kibana-elasticsearch-credentials --from-literal=elasticsearch.password=$PASSWORD
apiVersion: kibana.k8s.elastic.co/v1 kind: Kibana metadata: name: kibana-sample spec: version: 8.2.0 count: 1 config: elasticsearch.hosts: - https://elasticsearch.example.com:9200 elasticsearch.username: elastic secureSettings: - secretName: kibana-elasticsearch-credentials
If the external Elasticsearch cluster is using a self-signed certificate, create a Kubernetes Secret containing the CA certificate and mount it to the Kibana container as follows:
apiVersion: kibana.k8s.elastic.co/v1 kind: Kibana metadata: name: kibana-sample spec: version: 8.2.0 count: 1 config: elasticsearch.hosts: - https://elasticsearch-sample-es-http:9200 elasticsearch.username: elastic elasticsearch.ssl.certificateAuthorities: /etc/certs/ca.crt secureSettings: - secretName: kibana-elasticsearch-credentials podTemplate: spec: volumes: - name: elasticsearch-certs secret: secretName: elasticsearch-certs-secret containers: - name: kibana volumeMounts: - name: elasticsearch-certs mountPath: /etc/certs readOnly: true