upstream connect error or disconnect/reset before headers. reset reason: connection failure. Spring Boot and java 11

1

I’m having a problem migrating my pure Kubernetes app to an Istio managed. I’m using Google Cloud Platform (GCP), Istio 1.4, Google Kubernetes Engine (GKE), Spring Boot and JAVA 11.

I had the containers running in a pure GKE environment without a problem. Now I started the migration of my Kubernetes cluster to use Istio. Since then I’m getting the following message when I try to access the exposed service.

upstream connect error or disconnect/reset before headers. reset reason: connection failure

This error message looks like a really generic. I found a lot of different problems, with the same error message, but no one was related to my problem.

Bellow the version of the Istio:

client version: 1.4.10
control plane version: 1.4.10-gke.5
data plane version: 1.4.10-gke.5 (2 proxies)

Bellow my yaml files:

apiVersion: v1
kind: ServiceAccount
metadata:
  labels:
    account: tree-guest
  name: tree-guest-service-account
---
apiVersion: v1
kind: Service
metadata:
  labels:
    app: tree-guest
    service: tree-guest
  name: tree-guest
spec:
  ports:
  - name: http
    port: 8080
    targetPort: 8080
  selector:
    app: tree-guest
---
apiVersion: apps/v1
kind: Deployment
metadata:
  labels:
    app: tree-guest
    version: v1
  name: tree-guest-v1
spec:
  replicas: 1
  selector:
    matchLabels:
      app: tree-guest
      version: v1
  template:
    metadata:
      labels:
        app: tree-guestaz
        version: v1
    spec:
      containers:
      - image: registry.hub.docker.com/victorsens/tree-quest:circle_ci_build_00923285-3c44-4955-8de1-ed578e23c5cf
        imagePullPolicy: IfNotPresent
        name: tree-guest
        ports:
        - containerPort: 8080
      serviceAccount: tree-guest-service-account
---
apiVersion: networking.istio.io/v1alpha3
kind: Gateway
metadata:
  name: tree-guest-gateway
spec:
  selector:
    istio: ingressgateway # use istio default controller
  servers:
    - port:
        number: 80
        name: http
        protocol: HTTP
      hosts:
        - "*"
---
apiVersion: networking.istio.io/v1alpha3
kind: VirtualService
metadata:
  name: tree-guest-virtual-service
spec:
  hosts:
    - "*"
  gateways:
    - tree-guest-gateway
  http:
    - match:
        - uri:
            prefix: /v1
      route:
        - destination:
            host: tree-guest
            port:
              number: 8080

To apply the yaml file I used the following argument:

kubectl apply -f <(istioctl kube-inject -f ./tree-guest.yaml)

If someone have a tip about what is going wrong, please let me know. I’m stuck in this problem for a couple of days.

Thanks.