You can access Elastic resources by using native Kubernetes services that are not reachable from the public Internet by default.
For each resource, the operator manages a Kubernetes service named
<name>-[es|kb|apm|ent|agent]-http, which is of type
ClusterIP by default.
ClusterIP exposes the service on a cluster-internal IP and makes the service only reachable from the cluster.
> kubectl get svc NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE hulk-apm-http ClusterIP 10.19.212.105 <none> 8200/TCP 1m hulk-es-http ClusterIP 10.19.252.160 <none> 9200/TCP 1m hulk-kb-http ClusterIP 10.19.247.151 <none> 5601/TCP 1m
You can expose services in different ways by specifying an
http.service.spec.type in the
spec of the resource manifest.
On cloud providers which support external load balancers, you can set the
type field to
LoadBalancer to provision a load balancer for the
Service, and populate the column
EXTERNAL-IP after a short delay. Depending on the cloud provider, it may incur costs.
By default, the Elasticsearch service created by ECK is configured to route traffic to all Elasticsearch nodes in the cluster. Depending on your cluster configuration, you may want more control over the set of nodes that handle different types of traffic (query, ingest, and so on). Check Traffic Splitting for more information.
When you change the
clusterIP setting of the service, ECK will delete and re-create the service as
clusterIP is an immutable field. Depending on your client implementation, this might result in a short disruption until the service DNS entries refresh to point to the new endpoints.
apiVersion: <kind>.k8s.elastic.co/v1 kind: <Kind> metadata: name: hulk spec: version: 8.8.0 http: service: spec: type: LoadBalancer
> kubectl get svc NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE hulk-apm-http LoadBalancer 10.19.212.105 220.127.116.11 8200:31000/TCP 1m hulk-es-http LoadBalancer 10.19.252.160 18.104.22.168 9200:31320/TCP 1m hulk-kb-http LoadBalancer 10.19.247.151 22.214.171.124 5601:31380/TCP 1m
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