Deploy an Elasticsearch cluster
editDeploy an Elasticsearch cluster
editApply a simple Elasticsearch cluster specification, with one Elasticsearch node:
If your Kubernetes cluster does not have any Kubernetes nodes with at least 2GiB of free memory, the pod will be stuck in Pending
state. Check Manage compute resources for more information about resource requirements and how to configure them.
cat <<EOF | kubectl apply -f - apiVersion: elasticsearch.k8s.elastic.co/v1 kind: Elasticsearch metadata: name: quickstart spec: version: 8.15.3 nodeSets: - name: default count: 1 config: node.store.allow_mmap: false EOF
The operator automatically creates and manages Kubernetes resources to achieve the desired state of the Elasticsearch cluster. It may take up to a few minutes until all the resources are created and the cluster is ready for use.
Setting node.store.allow_mmap: false
has performance implications and should be tuned for production workloads as described in the Virtual memory section.
Monitor cluster health and creation progress
editGet an overview of the current Elasticsearch clusters in the Kubernetes cluster, including health, version and number of nodes:
kubectl get elasticsearch
NAME HEALTH NODES VERSION PHASE AGE quickstart green 1 8.15.3 Ready 1m
When you create the cluster, there is no HEALTH
status and the PHASE
is empty. After a while, the PHASE
turns into Ready
, and HEALTH
becomes green
. The HEALTH
status comes from Elasticsearch’s cluster health API.
One Pod is in the process of being started:
kubectl get pods --selector='elasticsearch.k8s.elastic.co/cluster-name=quickstart'
NAME READY STATUS RESTARTS AGE quickstart-es-default-0 1/1 Running 0 79s
Access the logs for that Pod:
kubectl logs -f quickstart-es-default-0
Request Elasticsearch access
editA ClusterIP Service is automatically created for your cluster:
kubectl get service quickstart-es-http
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE quickstart-es-http ClusterIP 10.15.251.145 <none> 9200/TCP 34m
-
Get the credentials.
A default user named
elastic
is automatically created with the password stored in a Kubernetes secret:PASSWORD=$(kubectl get secret quickstart-es-elastic-user -o go-template='{{.data.elastic | base64decode}}')
-
Request the Elasticsearch endpoint.
From inside the Kubernetes cluster:
curl -u "elastic:$PASSWORD" -k "https://quickstart-es-http:9200"
From your local workstation, use the following command in a separate terminal:
kubectl port-forward service/quickstart-es-http 9200
Then request
localhost
:curl -u "elastic:$PASSWORD" -k "https://localhost:9200"
Disabling certificate verification using the -k
flag is not recommended and should be used for testing purposes only. Check Setup your own certificate.
{ "name" : "quickstart-es-default-0", "cluster_name" : "quickstart", "cluster_uuid" : "XqWg0xIiRmmEBg4NMhnYPg", "version" : {...}, "tagline" : "You Know, for Search" }