Can not connect to the backend.

[fabian4]

Can not connect to the backend.

[jakubdyszkiewicz]

Triage: Hey, a couple of questions

• Can you post YAML of all traffic-permissions (kumactl get traffic-permissions -o yaml)
• Does it happen also when you open a page or just on search?

[fabian4]

1. Here is the full output

➜  ~ kumactl get traffic-permissions -o yaml
items:
- creationTime: "2024-01-18T15:42:48Z"
  destinations:
  - match:
      kuma.io/service: postgres_kuma-demo_svc_5432
  mesh: default
  modificationTime: "2024-01-18T15:42:48Z"
  name: backend-to-postgres
  sources:
  - match:
      kuma.io/service: backend_kuma-demo_svc_3001
  type: TrafficPermission
- creationTime: "2024-01-18T15:43:47Z"
  destinations:
  - match:
      kuma.io/service: redis_kuma-demo_svc_6379
  mesh: default
  modificationTime: "2024-01-18T15:43:47Z"
  name: backend-to-redis
  sources:
  - match:
      kuma.io/service: backend_kuma-demo_svc_3001
  type: TrafficPermission
- creationTime: "2024-01-18T15:42:48Z"
  destinations:
  - match:
      kuma.io/service: backend_kuma-demo_svc_3001
  mesh: default
  modificationTime: "2024-01-18T15:42:48Z"
  name: frontend-to-backend
  sources:
  - match:
      kuma.io/service: frontend_kuma-demo_svc_8080
  type: TrafficPermission
- creationTime: "2024-01-18T15:42:48Z"
  destinations:
  - match:
      kuma.io/service: frontend_kuma-demo_svc_8080
  mesh: default
  modificationTime: "2024-01-18T15:42:48Z"
  name: kong-to-frontend
  sources:
  - match:
      kuma.io/service: kong-validation-webhook_kuma-demo_svc_443
  type: TrafficPermission
next: null
total: 4

2. And It happens once you start the pod (here is the full detail log

Starting up http-server, serving /dist
Available on:
 http://127.0.0.1:8080
 http://10.42.0.107:8080
Unhandled requests will be served from: http://backend_kuma-demo_svc_3001.mesh
Hit CTRL-C to stop the server
[2024-01-24T16:39:53.692Z] "GET /" "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.36"
(node:1) [DEP0066] DeprecationWarning: OutgoingMessage.prototype._headers is deprecated
[2024-01-24T16:39:53.771Z] "GET /items?q" "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.36"
[2024-01-24T16:39:54.820Z] "GET /items?q" Error (404): "connect ECONNREFUSED 198.18.5.186:80"
[2024-01-24T16:39:54.820Z] "GET /items?q" Error (404): "Not found"
[2024-01-24T16:39:54.820Z] "GET /items?q" Error (404): "Not found"
[2024-01-24T16:40:00.914Z] "GET /" "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.36"
[2024-01-24T16:40:00.957Z] "GET /items?q" "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.36"
[2024-01-24T16:40:00.961Z] "GET /items?q" Error (404): "connect ECONNREFUSED 198.18.5.186:80"
[2024-01-24T16:40:00.961Z] "GET /items?q" Error (404): "Not found"
[2024-01-24T16:40:00.961Z] "GET /items?q" Error (404): "Not found"
[2024-01-24T16:40:01.752Z] "GET /" "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.36"
[2024-01-24T16:40:01.846Z] "GET /items?q" "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.36"
[2024-01-24T16:40:01.848Z] "GET /items?q" Error (404): "connect ECONNREFUSED 198.18.5.186:80"

[fabian4]

I figured it out !!!!

[2024-01-24T16:40:01.848Z] "GET /items?q" Error (404): "connect ECONNREFUSED 198.18.5.186:80"

The DNS request has been solved by my router outside the cluster Which has a fake-ip policy runs on it.
I think there is a DNS server in the cluster and that is the one really responsible for the service in the cluster? or how to configure it to make it right help.

BTW Thanks a lot for your time @jakubdyszkiewicz