My application is with Angular FE and multiple Asp.net core web api's. I have deployed this in AKS and configured Appgw AGIC. My Ingress controller details
Name: ingress-appgw-deployment-xxxxxxxx-xxxx
Namespace: kube-system
Priority: 0
Service Account: ingress-appgw-sa
Node: aks-agentpool-xxxxxxx-vmss000000/10.224.1.255
Start Time: Fri, 01 Mar 2024 02:16:47 +0400
Labels: app=ingress-appgw
kubernetes.azure.com/managedby=aks
pod-template-hash=6d4f68fc9f
Annotations: checksum/config: 1e53b6ba909ce787812767da80976912cc41007f8a716c489edab91f215b2bd7
cluster-autoscaler.kubernetes.io/safe-to-evict: true
kubernetes.azure.com/metrics-scrape: true
prometheus.io/path: /metrics
prometheus.io/port: 8123
prometheus.io/scrape: true
resource-id:
/subscriptions/ea88e1ed-fec0-472f-87f5-a00e6a608f19/resourceGroups/AZ-BELSIO-SOFTWARES-RG/providers/Microsoft.ContainerService/managedClus...
Status: Running
IP: 10.224.x.xx
IPs:
IP: 10.224.x.xx
Controlled By: ReplicaSet/ingress-appgw-deployment-6d4f68fc9f
Containers:
ingress-appgw-container:
Container ID: containerd://de72b0a2d86ffd7e11113b0ee38a374b509b212d56eac166391d28d4ae81849c
Image: mcr.microsoft.com/azure-application-gateway/kubernetes-ingress:1.7.2
Image ID: mcr.microsoft.com/azure-application-gateway/kubernetes-ingress@sha256:eeb1d42ebfb872478d9b0b16f6936ea938d6e5eed4a59cde332b8757556a5e1f
Port: <none>
Host Port: <none>
State: Running
Started: Fri, 01 Mar 2024 02:18:47 +0400
Last State: Terminated
Reason: Error
Exit Code: 255
Started: Fri, 01 Mar 2024 02:17:55 +0400
Finished: Fri, 01 Mar 2024 02:17:56 +0400
Ready: True
Restart Count: 4
Limits:
cpu: 700m
memory: 600Mi
Requests:
cpu: 100m
memory: 20Mi
Liveness: http-get http://:8123/health/alive delay=15s timeout=1s period=20s #success=1 #failure=3
Readiness: http-get http://:8123/health/ready delay=5s timeout=1s period=10s #success=1 #failure=3
Environment Variables from:
ingress-appgw-cm ConfigMap Optional: false
Environment:
AGIC_POD_NAMESPACE: kube-system (v1:metadata.namespace)
KUBERNETES_PORT_443_TCP_ADDR: belsio-dns-yvu9cnmb.hcp.uaenorth.azmk8s.io
KUBERNETES_PORT: tcp://myapp-dns-yvu9cnmb.hcp.uaenorth.azmk8s.io:443
KUBERNETES_PORT_443_TCP: tcp://myapp-dns-yvu9cnmb.hcp.uaenorth.azmk8s.io:443
KUBERNETES_SERVICE_HOST: myapp-dns-yvu9cnmb.hcp.uaenorth.azmk8s.io
AZURE_CLOUD_PROVIDER_LOCATION: /etc/kubernetes/azure.json
AGIC_POD_NAME: ingress-appgw-deployment-6d4f68fc9f-xtlmk (v1:metadata.name)
Mounts:
/etc/kubernetes/azure.json from cloud-provider-config (ro)
/var/run/secrets/kubernetes.io/serviceaccount from kube-api-access-9kcms (ro)
Conditions:
Type Status
Initialized True
Ready True
ContainersReady True
PodScheduled True
Volumes:
cloud-provider-config:
Type: HostPath (bare host directory volume)
Path: /etc/kubernetes/azure.json
HostPathType: File
kube-api-access-9kcms:
Type: Projected (a volume that contains injected data from multiple sources)
TokenExpirationSeconds: 3607
ConfigMapName: kube-root-ca.crt
ConfigMapOptional: <nil>
DownwardAPI: true
QoS Class: Burstable
Node-Selectors: <none>
Tolerations: CriticalAddonsOnly op=Exists
node.kubernetes.io/memory-pressure:NoSchedule op=Exists
node.kubernetes.io/not-ready:NoExecute op=Exists for 300s
node.kubernetes.io/unreachable:NoExecute op=Exists for 300s
Events: <none>
My ingress congiguration
apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
name: myapp
namespace: default
annotations:
kubernetes.io/ingress.class: azure/application-gateway
spec:
tls:
- hosts:
- app.example.com
rules:
- host: app.example.com
http:
paths:
- path: /
pathType: Exact
backend:
service:
name: angular
port:
number: 80
- path: /api1
pathType: Prefix
backend:
service:
name: api1
port:
number: 80
- path: /api2
pathType: Prefix
backend:
service:
name: api2
port:
number: 80
Expected: domain root path will route to Angular App and /api1 and /api2 to api's. I was able to achieve this in minikube using nginx IC using the same ingress configuration.
Issue: Angular is accessible but cannot access API's. I checked APIs by assigning a public and it's accessible but cannot with the ingress. In the health check, Angular pods are healthy but api pods are unhealth with the below message.
"Received invalid status code: 404 in the backend server’s HTTP response. As per the health probe configuration, 200-399 is the acceptable status code. Either modify probe configuration or resolve backend issues. To learn more visit - https://aka.ms/StatusCodeMismatch."
Please help me fix this and also suggest additional configurations that you think might help me.
Thank you in advance.
The issue was with the routing in the .NET code and was resolved by adding a root prefix for Swagger UI.
blog by CodeMaze helped. https://code-maze.com/aspnetcore-modify-a-base-uri-of-swagger/