Connection to elasticsearch on kubernetes fails - node.js

Question

I want to setup a simple single-node elasticsearch pod on kubernetes that I can connect to via my backend.
Here is the config for my service and statefulset:
apiVersion: v1
kind: Service
metadata:
name: elasticsearch
spec:
type: ClusterIP
clusterIP: None
selector:
app: elasticsearch
ports:
- port: 9200 # To get at the elasticsearch container, just hit the service on 9200
targetPort: 9200 # routes to the exposed port on elasticsearch
---
apiVersion: apps/v1
kind: StatefulSet
metadata:
name: elasticsearch # name of stateful
namespace: default
spec:
serviceName: elasticsearch
replicas: 1
selector:
matchLabels:
app: elasticsearch # should match service > spec.slector.app.
template:
metadata:
labels:
app: elasticsearch
spec:
volumes:
- name: elasticsearch-pvc
persistentVolumeClaim:
claimName: elasticsearch-volume-claim
containers:
- name: elasticsearch
image: docker.elastic.co/elasticsearch/elasticsearch:8.2.3
resources:
limits:
cpu: 100m
requests:
cpu: 100m
ports:
- containerPort: 9200
name: rest
protocol: TCP
- containerPort: 9300
name: inter-node
protocol: TCP
volumeMounts:
- name: elasticsearch-pvc
mountPath: /usr/share/elasticsearch/data
env:
- name: cluster.name
value: search
- name: node.name
valueFrom:
fieldRef:
fieldPath: metadata.name
- name: discovery.type
value: single-node
- name: ES_JAVA_OPTS
value: "-Xms512m -Xmx512m"
- name: xpack.security.enabled
value: "false"
initContainers:
- name: fix-permissions
image: busybox
command:
["sh", "-c", "chown -R 1000:1000 /usr/share/elasticsearch/data"]
securityContext:
privileged: true
volumeMounts:
- name: elasticsearch-pvc
mountPath: /usr/share/elasticsearch/data
- name: increase-vm-max-map
image: busybox
command: ["sysctl", "-w", "vm.max_map_count=262144"]
securityContext:
privileged: true
- name: increase-fd-ulimit
image: busybox
command: ["sh", "-c", "ulimit -n 65536"]
securityContext:
privileged: true
I'm connecting via the javascript client ("#elastic/elasticsearch": "^8.2.1") like so:
import { Client, HttpConnection } from '#elastic/elasticsearch'
import config from '../../config'
export const client = new Client({
node: config.elasticSearch.host,
headers: {
Accept: 'application/json',
'Content-Type': 'application/json'
},
Connection: HttpConnection
})
Where config.elasticSearch.host = http://elasticsearch:9200
However when I run my initial seed script I get the following error:
/app/node_modules/#elastic/transport/lib/Transport.js:525
: new errors_1.ConnectionError(error.message, result);
^
ConnectionError: connect ECONNREFUSED 10.244.0.112:9200
I'm not entirely sure why the connection is being refused since the service should be directing the request to my elasticsearch stateful set.