I'm trying to configure cache for a specific host, but getting 404. Also It seems my config was not included into final nginx.conf. This file doesn't contain it
My ingress.yaml:
apiVersion: extensions/v1beta1
kind: Ingress
metadata:
name: images-ingress
labels:
last_updated: "14940999355"
annotations:
kubernetes.io/ingress.class: "nginx"
cert-manager.io/cluster-issuer: "letsencrypt-prod"
nginx.ingress.kubernetes.io/rewrite-target: /
nginx.ingress.kubernetes.io/proxy-body-size: 8m
nginx.ingress.kubernetes.io/proxy-buffering: "on"
nginx.ingress.kubernetes.io/server-snippet: |
proxy_cache static-cache;
proxy_cache_valid 404 10m;
proxy_cache_use_stale error timeout updating http_404 http_500 http_502 http_503 http_504;
proxy_cache_bypass $http_x_purge;
add_header X-Cache-Status $upstream_cache_status;
spec:
tls:
- hosts:
- static.qwstrs.com
secretName: letsencrypt-prod
rules:
- host: static.qwstrs.com
http:
paths:
- path: /
backend:
serviceName: imaginary
servicePort: 9000
If I remove this sample
nginx.ingress.kubernetes.io/server-snippet: |
proxy_cache static-cache;
proxy_cache_valid 404 10m;
proxy_cache_use_stale error timeout updating http_404 http_500 http_502 http_503 http_504;
proxy_cache_bypass $http_x_purge;
add_header X-Cache-Status $upstream_cache_status;
everything works but without cache
even if I have one line from snippet above It produces 404 error and doesn't work
nginx.ingress.kubernetes.io/server-snippet: |
proxy_cache static-cache;
To enable caching, you need to configure the proxy_cache_path for the nginx-ingress-controller.
You can do it by modifying the ConfigMap for nginx-ingress-controller.
I've created an example to illustrate you how it works (I assume you have kubernetes/ingress-nginx).
First, create a ConfigMap named ingress-nginx-controller as described in the documentation custom_configuration:
Note: You may need to modify the proxy_cache_path settings, but shared memory zone (keys_zone=static-cache) should be the same as in your proxy_cache directive.
$ cat configmap.yml
# configmap.yaml
apiVersion: v1
kind: ConfigMap
metadata:
name: ingress-nginx-controller
namespace: default
data:
http-snippet: "proxy_cache_path /tmp/nginx_cache levels=1:2 keys_zone=static-cache:10m max_size=10g inactive=60m use_temp_path=off;"
$ kubectl apply -f configmap.yml
configmap/ingress-nginx-controller configured
And then create the Ingress resource ( I've modified your ingress resource a bit to demonstrate how X-Cache-Status header works):
$ cat ingress.yml
apiVersion: extensions/v1beta1
kind: Ingress
metadata:
name: images-ingress
annotations:
kubernetes.io/ingress.class: "nginx"
nginx.ingress.kubernetes.io/rewrite-target: /
nginx.ingress.kubernetes.io/proxy-body-size: 8m
nginx.ingress.kubernetes.io/proxy-buffering: "on"
nginx.ingress.kubernetes.io/configuration-snippet: |
proxy_cache static-cache;
proxy_cache_valid any 60m;
add_header X-Cache-Status $upstream_cache_status;
spec:
tls:
- hosts:
- static.qwstrs.com
secretName: letsencrypt-prod
rules:
- host: static.qwstrs.com
http:
paths:
- path: /
backend:
serviceName: imaginary
servicePort: 9000
$ kubectl apply -f ingress.yml
ingress.extensions/images-ingress configured
Finally we can check:
$ curl -k -I https://static.qwstrs.com
HTTP/2 200
...
x-cache-status: MISS
accept-ranges: bytes
$ curl -k -I https://static.qwstrs.com
HTTP/2 200
...
x-cache-status: HIT
accept-ranges: bytes
More information on proxy_cache_path and proxy_cache can be found here.