I'm currently learning kubernetes bases and i would like to expose a mongodb outside of my cluser. I've setting up my nginx ingress controller and followig this doc to expose plain TCP connexion.
This is my Ingress Service configuration :
apiVersion: v1
kind: Service
metadata:
annotations:
labels:
helm.sh/chart: ingress-nginx-4.0.15
app.kubernetes.io/name: ingress-nginx
app.kubernetes.io/instance: ingress-nginx
app.kubernetes.io/version: 1.1.1
app.kubernetes.io/managed-by: Helm
app.kubernetes.io/component: controller
name: ingress-nginx-controller
namespace: ingress-nginx
spec:
type: NodePort
ipFamilyPolicy: SingleStack
externalIPs:
- 172.30.63.51
ipFamilies:
- IPv4
ports:
- name: http
port: 80
protocol: TCP
targetPort: http
appProtocol: http
- name: https
port: 443
protocol: TCP
targetPort: https
appProtocol: https
- name: proxied-tcp-27017
port: 27017
protocol: TCP
targetPort: 27017
selector:
app.kubernetes.io/name: ingress-nginx
app.kubernetes.io/instance: ingress-nginx
app.kubernetes.io/component: controller
The configmap to proxy TCP connexions :
apiVersion: v1
kind: ConfigMap
metadata:
name: tcp-services
namespace: ingress-nginx
data:
27017: "global-stack/global-stack-mongo-svc:27017"
My ingress conroller works well on ports 80 and 443 to expose my services but impossible for me to access to port 27017
Result of kubectl get svc -n ingress-nginx :
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S)
ingress-nginx-controller NodePort 10.97.149.93 172.30.63.51 80:30159/TCP,443:32585/TCP,27017:30098/TCP
ingress-nginx-controller-admission ClusterIP 10.107.33.165 <none> 443/TCP
External IP is well responding to curl 172.30.63.51:80
<html>
<head><title>404 Not Found</title></head>
<body>
<center><h1>404 Not Found</h1></center>
<hr><center>nginx</center>
</body>
</html>
But can't respond to port 27017 :
curl: (7) Failed to connect to 172.30.63.51 port 27017: Connection refused
My mongo service :
apiVersion: v1
kind: Service
metadata:
name: global-stack-mongo-svc
namespace: global-stack
labels:
app: global-stack-mongo-app
spec:
type: ClusterIP
ports:
- name: http
port: 27017
protocol: TCP
targetPort: 27017
selector:
app: global-stack-mongo-app
The services's cluster IP is 10.244.1.57 and well responding
>> curl 10.244.1.57:27017
It looks like you are trying to access MongoDB over HTTP on the native driver port.
If anyone could help me I would be very grateful. Thanks
Guieme.
After some research I solved my issue.
in the nginx-ingress documentation, it's not described but you need to mapp the TCP config map with the ingress-controller container with this lines into the deployment file :