So this is my current setup.
I have a k8 cluster with nginx controller installed. I installed nginx using helm.
So I have a simple apple service as below:
kind: Pod
apiVersion: v1
metadata:
name: apple-app
labels:
app: apple
spec:
containers:
- name: apple-app
image: hashicorp/http-echo
args:
- "-text=apple"
---
kind: Service
apiVersion: v1
metadata:
name: apple-service
spec:
selector:
app: apple
ports:
- port: 5678 # Default port for imageand then I did a kubectl apply -f apples.yaml
Now i have an ingress.yaml as below.
apiVersion: extensions/v1beta1
kind: Ingress
metadata:
name: example-ingress
annotations:
ingress.kubernetes.io/rewrite-target: /
spec:
rules:
- http:
paths:
- path: /apple
backend:
serviceName: apple-service
servicePort: 5678and then I kubectl -f ingress.yaml
my ingress controller doesnt have an external ip address.
But even without the external ip, I did a
kubectl exec -it nginxdeploy-nginx-ingress-controller-5d6ddbb677-774xc /bin/bashAnd tried doing a curl kL http://localhost/apples
and its giving me a 503 error.
Anybody can help on this?
I've tested your configuration, and it seems to be working fine to me.
Pod responds fine:
$ kubectl describe pod apple-app
Name: apple-app
Namespace: default
Node: kube-helm/10.156.0.2
Start Time: Mon, 10 Sep 2018 11:53:57 +0000
Labels: app=apple
Annotations: <none>
Status: Running
IP: 192.168.73.73
...
$ curl http://192.168.73.73:5678
apple
Service responds fine:
$ kubectl get service
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
apple-service ClusterIP 10.111.93.194 <none> 5678/TCP 1m
$ curl http://10.111.93.194:5678
apple
Ingress also responds fine, but by default it redirects http to https:
$ kubectl exec -it nginx-ingress-controller-6c9fcdf8d9-ggrcs -n ingress-nginx /bin/bash
www-data@nginx-ingress-controller-6c9fcdf8d9-ggrcs:/etc/nginx$ curl http://localhost/apple
<html>
<head><title>308 Permanent Redirect</title></head>
<body bgcolor="white">
<center><h1>308 Permanent Redirect</h1></center>
<hr><center>nginx/1.13.12</center>
</body>
</html>
www-data@nginx-ingress-controller-6c9fcdf8d9-ggrcs:/etc/nginx$ curl -k https://localhost/apple
appleIf you check the nginx configuration in controller pod, you will see that redirect configuration for /apple location:
www-data@nginx-ingress-controller-6c9fcdf8d9-ggrcs:/etc/nginx$ more /etc/nginx/nginx.conf
...
location /apple {
set $namespace "default";
set $ingress_name "example-ingress";
set $service_name "apple-service";
set $service_port "5678";
set $location_path "/apple";
rewrite_by_lua_block {
}
log_by_lua_block {
monitor.call()
}
if ($scheme = https) {
more_set_headers "Strict-Transport-Security: max-age=1572
4800; includeSubDomains";
}
port_in_redirect off;
set $proxy_upstream_name "default-apple-service-5678";
# enforce ssl on server side
if ($redirect_to_https) {
return 308 https://$best_http_host$request_uri;
}
client_max_body_size "1m";
proxy_set_header Host $best_http_host;
# Pass the extracted client certificate to the backend
# Allow websocket connections
proxy_set_header Upgrade $http_upgrade;
proxy_set_header Connection $connection_upgrade;
proxy_set_header X-Request-ID $req_id;
proxy_set_header X-Real-IP $the_real_ip;
proxy_set_header X-Forwarded-For $the_real_ip;
proxy_set_header X-Forwarded-Host $best_http_host;
proxy_set_header X-Forwarded-Port $pass_port;
proxy_set_header X-Forwarded-Proto $pass_access_scheme;
proxy_set_header X-Original-URI $request_uri;
proxy_set_header X-Scheme $pass_access_scheme;
# Pass the original X-Forwarded-For
proxy_set_header X-Original-Forwarded-For $http_x_forwarded_for;
# mitigate HTTPoxy Vulnerability
# https://www.nginx.com/blog/mitigating-the-httpoxy-vulnerability-with-nginx/
proxy_set_header Proxy "";
# Custom headers to proxied server
proxy_connect_timeout 5s;
proxy_send_timeout 60s;
proxy_read_timeout 60s;
proxy_buffering "off";
proxy_buffer_size "4k";
proxy_buffers 4 "4k";
proxy_request_buffering "on";
proxy_http_version 1.1;
proxy_cookie_domain off;
proxy_cookie_path off;
# In case of errors try the next upstream server before returning an error
proxy_next_upstream error timeout;
proxy_next_upstream_tries 3;
proxy_pass http://default-apple-service-5678;
proxy_redirect off;
}
You can disable this default behavior by adding annotations:
apiVersion: extensions/v1beta1
kind: Ingress
metadata:
name: example-ingress
annotations:
kubernetes.io/ingress.class: "nginx"
nginx.ingress.kubernetes.io/ssl-redirect: "false"
ingress.kubernetes.io/rewrite-target: /
spec:
rules:
- http:
paths:
- path: /apple
backend:
serviceName: apple-service
servicePort: 5678
www-data@nginx-ingress-controller-6c9fcdf8d9-ggrcs:/etc/nginx$ curl http://localhost/apple
apple