This directory contains an a small query service that hits an elasticsearch endpoint to perform a free text query. It contains the following components:
The Elasticsearch cluster is created using the ElasticCloud CRD. The code has been pre-imported and included in this application.
To learn mode about using CRD's with
cdk8s, see Custom Resource Definitions and CRD Example
A kubernetes deployment is created using the cdk8s-plus Deployment construct.
A kubecrnetes service that serves the deployment is created using the cdk8s-plus Service construct.
To build the example, run:
npm run build
This will compile the TypeScript code into JavaScript, run tests, and perform synth
To synthesize a Kubernetes manifest from the compiled TypeScript code, run:
cdk8s synth
Note that you have to recompile (npm run compile) everytime you make a change to the TypeScript code. Alternatively, for development, you run a backgroud watcher:
npm run watch
Before you can apply the manifest, you need to install the Elasticsearch Operator and CRD to your cluster. To do that, run the command (just once):
kubectl apply -f https://download.elastic.co/downloads/eck/1.1.2/all-in-one.yaml
To apply the manifest to your Kubernetes cluster, run:
kubectl apply -f dist/elasticsearchquery.k8s.yaml
This example has a data.txt file that contains some mock documents that can be indexed to the Elasticsearch cluster, for quick development iterations.
npm run index-mock-data