I'm trying to set up a simple HTTP to HTTPS redirect for traffic going to a Kubernetes cluster. The SSL termination is happening on the ELB. When I try to use the nginx.ingress.kubernetes.io/ssl-redirect = true
it results in an infinite redirect which led me to setting up a config map to handle this (nginx-ingress: Too many redirects when force-ssl is enabled).
Now there seems to be no redirection happening at all.
My ingress service is defined as:
apiVersion: v1
kind: Service
metadata:
annotations:
service.beta.kubernetes.io/aws-load-balancer-backend-protocol: tcp
service.beta.kubernetes.io/aws-load-balancer-connection-idle-timeout: "3600"
service.beta.kubernetes.io/aws-load-balancer-proxy-protocol: '*'
service.beta.kubernetes.io/aws-load-balancer-ssl-cert: arn:aws:acm:...:certificate/...
service.beta.kubernetes.io/aws-load-balancer-ssl-ports: https
labels:
k8s-addon: ingress-nginx.addons.k8s.io
name: ingress-nginx
namespace: ingress-nginx
spec:
externalTrafficPolicy: Cluster
ports:
- name: https
port: 443
protocol: TCP
targetPort: http
- name: http
port: 80
protocol: TCP
targetPort: http
selector:
app: ingress-nginx
type: LoadBalancer
My config map is defined as:
apiVersion: v1
kind: ConfigMap
data:
client-body-buffer-size: 32M
hsts: "true"
proxy-body-size: 1G
proxy-buffering: "off"
proxy-read-timeout: "600"
proxy-send-timeout: "600"
server-tokens: "false"
ssl-redirect: "false"
upstream-keepalive-connections: "50"
use-proxy-protocol: "true"
http-snippet: |
server {
listen 8080 proxy_protocol;
server_tokens off;
return 307 https://$host$request_uri;
}
metadata:
labels:
app: ingress-nginx
name: nginx-configuration
namespace: ingress-nginx
---
apiVersion: v1
kind: ConfigMap
metadata:
name: tcp-services
namespace: ingress-nginx
---
apiVersion: v1
kind: ConfigMap
metadata:
name: udp-services
namespace: ingress-nginx
And, the ingress is defined as:
apiVersion: extensions/v1beta1
kind: Ingress
metadata:
name: gateway-ingress
annotations:
nginx.ingress.kubernetes.io/cors-allow-credentials: "true"
nginx.ingress.kubernetes.io/cors-allow-headers: Authorization, origin, accept
nginx.ingress.kubernetes.io/cors-allow-methods: GET, OPTIONS
nginx.ingress.kubernetes.io/cors-allow-origin: gateway.example.com.com/monitor
nginx.ingress.kubernetes.io/enable-cors: "true"
nginx.ingress.kubernetes.io/ssl-redirect: "false"
spec:
rules:
- host: gateway.example.com
http:
paths:
- backend:
serviceName: gateway
servicePort: 8080
path: /
tls:
- hosts:
- gateway.example.com
The issue was the target port I was using on the load balancer not matching the port the redirection server was listening on:
ports:
- name: http
port: 80
protocol: TCP
targetPort: http
This was just sending everything to port 80. It should have been this:
ports:
- name: http
port: 80
protocol: TCP
targetPort: 8080
That way it matches up with the ConfigMap's:
data:
...
http-snippet: |
server {
listen 8080 proxy_protocol;
server_tokens off;
return 307 https://$host$request_uri;
}