K8S Nginx Ingress issue - invalid condition - nginx

Question

I have trouble about nginx ingress using condition
Install Nginx Ingress via helm instal (tested in both nginx-ingress-1.16 and nginx-ingress-1.36
I am try to follow
ingress nginx redirect from www to https
Setup some condition
like
nginx.ingress.kubernetes.io/configuration-snippet: |
if ( $host = "mydomain.co" ) {
rewrite ^ https://www.mydomain.co$uri permanent;
}
When apply the ingress rule, nginx ingress start reload in fail status
-------------------------------------------------------------------------------
W0602 07:35:36.244415 6 queue.go:130] requeuing vincent/demoheader-ingress, err
-------------------------------------------------------------------------------
Error: exit status 1
2020/06/02 07:35:36 [notice] 982#982: ModSecurity-nginx v1.0.0
2020/06/02 07:35:36 [emerg] 982#982: invalid condition "~" in /tmp/nginx-cfg971999838:530
nginx: [emerg] invalid condition "~" in /tmp/nginx-cfg971999838:530
nginx: configuration file /tmp/nginx-cfg971999838 test failed
My Full ingress rule
apiVersion: extensions/v1beta1
kind: Ingress
metadata:
name: demoheader-ingress
namespace: namespace
annotations:
kubernetes.io/ingress.class: nginx-temp
nginx.ingress.kubernetes.io/force-ssl-redirect: "true"
nginx.ingress.kubernetes.io/from-to-www-redirect: "true"
nginx.ingress.kubernetes.io/configuration-snippet: |
if ( $uri ~* ^/xx/(.*) ) {
rewrite ^ https://www.xxx.co permanent;
}
spec:
rules:
- host: mydomain
http:
paths:
- backend:
serviceName: header-headerv1
servicePort: 80
path: /
EOF
Any idea ?

Answer 1

OK i know what happen in here
I encount a wired issue for k8s apply stuff ….
While official document told you , you can apply object by this method
cat <<EOF | kubectl apply -f -
xxx
yyy
eee
EOF
https://kubernetes.io/docs/reference/kubectl/cheatsheet/
However for ingress rule , if you under a specific condition such like this
nginx.ingress.kubernetes.io/configuration-snippet: |
if ( $host = ^mydomain ) {
rewrite ^ https://www.mydomain$uri permanent;
}
you are unable to make the nginx working again (never config reload success, it will affect the following config change)
Until you delete the ingress rule and re-apply by
kubectl apply -f the-ingress-file