elasticsearchHow do I deploy Elasticsearch on Kubernetes?
-
Create a Kubernetes cluster: The first step is to create a Kubernetes cluster. This can be done using the
kubectl create cluster
command. -
Install Helm: Helm is a package manager for Kubernetes and is needed to install the Elasticsearch Helm chart. Helm can be installed using the command
helm init
. -
Install the Elasticsearch Helm chart: The Elasticsearch Helm chart can be installed using the command
helm install stable/elasticsearch
. This will create a deployment with the necessary components for running Elasticsearch on Kubernetes. -
Configure the Elasticsearch deployment: The configuration for the Elasticsearch deployment can be done using a
values.yaml
file. This file can be used to configure the number of replicas, memory and CPU limits, and other settings. -
Create a service for the Elasticsearch deployment: The Elasticsearch deployment needs to be exposed to the outside world. This can be done by creating a service using the command
kubectl expose deployment <deployment-name> --type=LoadBalancer
. -
Verify the deployment: Once the deployment is complete, it can be verified using the command
kubectl get pods
. This will list all the pods that have been created for the Elasticsearch deployment. -
Access the Elasticsearch cluster: After the deployment is complete, the Elasticsearch cluster can be accessed using the service endpoint.
curl http://<service-endpoint>:9200
Output example
{
"name" : "elasticsearch-cluster",
"cluster_name" : "elasticsearch",
"cluster_uuid" : "abc123",
"version" : {
"number" : "7.0.0",
...
},
...
}
Code explanation
**
kubectl create cluster
: This command creates a Kubernetes cluster.helm init
: This command installs Helm, a package manager for Kubernetes.helm install stable/elasticsearch
: This command installs the Elasticsearch Helm chart.values.yaml
: This file is used to configure the Elasticsearch deployment.kubectl expose deployment <deployment-name> --type=LoadBalancer
: This command creates a service for the Elasticsearch deployment.kubectl get pods
: This command lists all the pods that have been created for the Elasticsearch deployment.curl http://<service-endpoint>:9200
: This command accesses the Elasticsearch cluster.
## Helpful links
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- How do I set up an Elasticsearch Yum repository?
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