I started few microservices in a k8s cluster like eureka service discovery(using service object) server and few client microservice which are registered with eureka server. Till here everything was fine eureka server is up and running and I am able to access it using the node IP. But after that I was asked to run one more service and that was delivered by my frontend team as DockerFile. Below is the content of DockerFile
### STAGE 1: Build ###
FROM node:12.7-alpine AS build
WORKDIR /usr/src/app
COPY package.json ./
RUN npm install
COPY . .
RUN npm run build
### STAGE 2: Run ###
FROM nginx:1.17.1-alpine
COPY --from=build /usr/src/app/dist/login /usr/share/nginx/html
I created a helm chart using (helm create UI) and changed the image accordingly. After that I installed the application using helm install command & I created a service object of type NodePort also. But the problem is I am not able to access the service or application.
But, when I start the application using docker run command as used by frontend team to test it locally
docker run --name userinterface -d -p 8585:80 userinterface
I am able to access the service from k8s cluster using URL http://localhost:8585.
Which obviously we don't want in production and for that I created a helm chart and service object accordingly.
kubectl get pods
ui-comp-5458cd5654-wpbvw 1/1 Running 0 35m
kubectl get svc
userinterface NodePort 10.98.75.125 <none> 80:30003/TCP 35m
discovery-server NodePort 10.97.34.27 <none> 80:30005/TCP 7d18h
But while to trying access using nodeIP, I am not getting any o/p
curl http://<node_ip>:30003
I tried to create and install this frontend service exactly the same way the eureka server is running.
I am not sure, what else I am missing here ?
Any suggestion please.
Adding deployment.yaml and service.yaml for the same:
service.yaml
controller-1:~$ kubectl get svc ui-comp -o yaml
apiVersion: v1
kind: Service
metadata:
annotations:
meta.helm.sh/release-name: ui-comp
meta.helm.sh/release-namespace: default
creationTimestamp: "2021-01-29T07:56:19Z"
labels:
app: ui-comp
app.kubernetes.io/managed-by: Helm
managedFields:
- apiVersion: v1
fieldsType: FieldsV1
fieldsV1:
f:metadata:
f:annotations:
.: {}
f:meta.helm.sh/release-name: {}
f:meta.helm.sh/release-namespace: {}
f:labels:
.: {}
f:app: {}
f:app.kubernetes.io/managed-by: {}
f:spec:
f:externalTrafficPolicy: {}
f:ports:
.: {}
k:{"port":80,"protocol":"TCP"}:
.: {}
f:nodePort: {}
f:port: {}
f:protocol: {}
f:targetPort: {}
f:selector:
.: {}
f:app.kubernetes.io/instance: {}
f:app.kubernetes.io/name: {}
f:sessionAffinity: {}
f:type: {}
manager: Go-http-client
operation: Update
time: "2021-01-29T07:56:19Z"
name: ui-comp
namespace: default
resourceVersion: "31111377"
selfLink: /api/v1/namespaces/default/services/ui-comp
uid: 20428f83-92f3-4c84-b573-cb124d2efb39
spec:
clusterIP: 10.98.75.125
externalTrafficPolicy: Cluster
ports:
- nodePort: 30003
port: 80
protocol: TCP
targetPort: 8585
selector:
app.kubernetes.io/instance: ui-comp
app.kubernetes.io/name: ui-comp
sessionAffinity: None
type: NodePort
status:
loadBalancer: {}
controller-1:~$
deployment.yaml
controller-1:~$ kubectl get deploy ui-comp -o yaml
apiVersion: apps/v1
kind: Deployment
metadata:
annotations:
deployment.kubernetes.io/revision: "1"
meta.helm.sh/release-name: ui-comp
meta.helm.sh/release-namespace: default
creationTimestamp: "2021-01-29T07:56:19Z"
generation: 1
labels:
app: ui-comp
app.kubernetes.io/managed-by: Helm
managedFields:
- apiVersion: apps/v1
fieldsType: FieldsV1
fieldsV1:
f:metadata:
f:annotations:
.: {}
f:meta.helm.sh/release-name: {}
f:meta.helm.sh/release-namespace: {}
f:labels:
.: {}
f:app: {}
f:app.kubernetes.io/managed-by: {}
f:spec:
f:progressDeadlineSeconds: {}
f:replicas: {}
f:revisionHistoryLimit: {}
f:selector:
f:matchLabels:
.: {}
f:app: {}
f:strategy:
f:rollingUpdate:
.: {}
f:maxSurge: {}
f:maxUnavailable: {}
f:type: {}
f:template:
f:metadata:
f:labels:
.: {}
f:app: {}
f:spec:
f:containers:
k:{"name":"ui-comp"}:
.: {}
f:image: {}
f:imagePullPolicy: {}
f:name: {}
f:ports:
.: {}
k:{"containerPort":8585,"protocol":"TCP"}:
.: {}
f:containerPort: {}
f:name: {}
f:protocol: {}
f:resources: {}
f:securityContext: {}
f:terminationMessagePath: {}
f:terminationMessagePolicy: {}
f:dnsPolicy: {}
f:imagePullSecrets:
.: {}
k:{"name":"regcred"}:
.: {}
f:name: {}
f:restartPolicy: {}
f:schedulerName: {}
f:securityContext: {}
f:serviceAccount: {}
f:serviceAccountName: {}
f:terminationGracePeriodSeconds: {}
manager: Go-http-client
operation: Update
time: "2021-01-29T07:56:19Z"
- apiVersion: apps/v1
fieldsType: FieldsV1
fieldsV1:
f:metadata:
f:annotations:
f:deployment.kubernetes.io/revision: {}
f:status:
f:availableReplicas: {}
f:conditions:
.: {}
k:{"type":"Available"}:
.: {}
f:lastTransitionTime: {}
f:lastUpdateTime: {}
f:message: {}
f:reason: {}
f:status: {}
f:type: {}
k:{"type":"Progressing"}:
.: {}
f:lastTransitionTime: {}
f:lastUpdateTime: {}
f:message: {}
f:reason: {}
f:status: {}
f:type: {}
f:observedGeneration: {}
f:readyReplicas: {}
f:replicas: {}
f:updatedReplicas: {}
manager: kube-controller-manager
operation: Update
time: "2021-01-29T07:56:22Z"
name: ui-comp
namespace: default
resourceVersion: "31111428"
selfLink: /apis/apps/v1/namespaces/default/deployments/ui-comp
uid: 2683b379-e3f3-4908-8db7-4a0617f40c0b
spec:
progressDeadlineSeconds: 600
replicas: 1
revisionHistoryLimit: 10
selector:
matchLabels:
app: ui-comp
strategy:
rollingUpdate:
maxSurge: 25%
maxUnavailable: 25%
type: RollingUpdate
template:
metadata:
creationTimestamp: null
labels:
app: ui-comp
spec:
containers:
- image: neerajkp/sotool:ui
imagePullPolicy: Always
name: ui-comp
ports:
- containerPort: 8585
name: http
protocol: TCP
resources: {}
securityContext: {}
terminationMessagePath: /dev/termination-log
terminationMessagePolicy: File
dnsPolicy: ClusterFirst
imagePullSecrets:
- name: regcred
restartPolicy: Always
schedulerName: default-scheduler
securityContext: {}
serviceAccount: ui-comp
serviceAccountName: ui-comp
terminationGracePeriodSeconds: 30
status:
availableReplicas: 1
conditions:
- lastTransitionTime: "2021-01-29T07:56:22Z"
lastUpdateTime: "2021-01-29T07:56:22Z"
message: Deployment has minimum availability.
reason: MinimumReplicasAvailable
status: "True"
type: Available
- lastTransitionTime: "2021-01-29T07:56:19Z"
lastUpdateTime: "2021-01-29T07:56:22Z"
message: ReplicaSet "ui-comp-5458cd5654" has successfully progressed.
reason: NewReplicaSetAvailable
status: "True"
type: Progressing
observedGeneration: 1
readyReplicas: 1
replicas: 1
updatedReplicas: 1
controller-1:~$
After correction.
controller-1:~/neeraj/k8s/charts$ kubectl describe svc ui-comp
Name: ui-comp
Namespace: default
Labels: app=ui-comp
app.kubernetes.io/managed-by=Helm
Annotations: meta.helm.sh/release-name: ui-comp
meta.helm.sh/release-namespace: default
Selector: app=ui-comp
Type: NodePort
IP: 10.98.253.188
Port: <unset> 80/TCP
TargetPort: 8585/TCP
NodePort: <unset> 30003/TCP
Endpoints: 10.244.166.184:8585
Session Affinity: None
External Traffic Policy: Cluster
Events: <none>
controller-1:~/neeraj/k8s/charts$ curl http://10.207.5.1:30003
curl: (7) Failed connect to 10.207.5.1:30003; Connection refused
controller-1:~/neeraj/k8s/charts$
question from:
https://stackoverflow.com/questions/65951225/not-able-to-access-frontend-pod-in-a-kubernetes-cluster 
