the ingress controller config failed when use regex path

[hchenxa]

Is this a request for help? (If yes, you should use our troubleshooting guide and community support channels, see https://kubernetes.io/docs/tasks/debug-application-cluster/troubleshooting/.):

What keywords did you search in NGINX Ingress controller issues before filing this one? (If you have found any duplicates, you should instead reply there.):

---

Is this a BUG REPORT or FEATURE REQUEST? (choose one):

NGINX Ingress controller version:
0.19.0

Kubernetes version (use kubectl version):
v1.11.1

Environment:

• Cloud provider or hardware configuration:
• OS (e.g. from /etc/os-release):
• Kernel (e.g. uname -a):
• Install tools:
• Others:

What happened:

refer the to config the local regx, https://kubernetes.github.io/ingress-nginx/user-guide/ingress-path-matching/#example_1

the nginx ingress controller config failed like below:

I1019 03:52:18.079192       8 controller.go:171] Configuration changes detected, backend reload required.
I1019 03:52:18.080406       8 util.go:68] rlimit.max=1048576
I1019 03:52:18.080422       8 nginx.go:525] Maximum number of open file descriptors: 64512
E1019 03:52:18.121635       8 controller.go:183] Unexpected failure reloading the backend:

-------------------------------------------------------------------------------
Error: exit status 1
2018/10/19 03:52:18 [emerg] 9278#9278: unknown directive "3}" in /tmp/nginx-cfg761235695:645
nginx: [emerg] unknown directive "3}" in /tmp/nginx-cfg761235695:645
nginx: configuration file /tmp/nginx-cfg761235695 test failed

-------------------------------------------------------------------------------
W1019 03:52:18.121659       8 queue.go:130] requeuing default/test-ingress-3, err
-------------------------------------------------------------------------------
Error: exit status 1
2018/10/19 03:52:18 [emerg] 9278#9278: unknown directive "3}" in /tmp/nginx-cfg761235695:645
nginx: [emerg] unknown directive "3}" in /tmp/nginx-cfg761235695:645
nginx: configuration file /tmp/nginx-cfg761235695 test failed

-------------------------------------------------------------------------------

What you expected to happen:

How to reproduce it (as minimally and precisely as possible):

Anything else we need to know:

[hchenxa]

check the nginx.conf, the location like below:

	location /foo/bar/[A-Z0-9]{3} {

		set $namespace      "default";
		set $ingress_name   "test-ingress-3";
		set $service_name   "test";
		set $service_port   "80";

I am not sure if we should add double quotation marks like below:

	location "/foo/bar/[A-Z0-9]{3}" {

		set $namespace      "default";
		set $ingress_name   "test-ingress-3";
		set $service_name   "test";
		set $service_port   "80";

cc @aledbf comments?

[aledbf]

Closing. This is fixed in 0.20.0 #3182

[hchenxa]

great, I will try with 0.20.0.