How to access MySql hosted with Nginx Ingress+Kubernetes from client - docker

Question

I am new to Kubernetes and Nginx Ingress tools and now i am trying to host MySql service using VHost in Nginx Ingress on AWS. I have created a file something like :
apiVersion: v1
kind: Service
metadata:
name: mysql
labels:
app: mysql
spec:
type: NodePort
ports:
- port: 3306
protocol: TCP
selector:
app: mysql
---
apiVersion: apps/v1beta2
kind: Deployment
metadata:
name: mysql
labels:
app: mysql
spec:
replicas: 1
selector:
matchLabels:
app: mysql
template:
metadata:
labels:
app: mysql
spec:
containers:
- name: mysql
image: mysql
imagePullPolicy: IfNotPresent
env:
- name: MYSQL_ROOT_PASSWORD
value: password
ports:
- name: http
containerPort: 3306
protocol: TCP
---
apiVersion: extensions/v1beta1
kind: Ingress
metadata:
name: mysql
labels:
app: mysql
annotations:
kubernetes.io/ingress.class: "nginx"
spec:
rules:
- host: mysql.example.com
http:
paths:
- path: /
backend:
serviceName: mysql
servicePort: 3306
My LoadBalancer (created by Nginx Ingress) port configuration looks like :
80 (TCP) forwarding to 32078 (TCP)
Stickiness options not available for TCP protocols
443 (TCP) forwarding to 31480 (TCP)
Stickiness options not available for TCP protocols
mysql.example.com is pointing to my ELB.
I was expecting something like, from my local box i can connect to MySql if try something like :
mysql -h mysql.example.com -u root -P 80 -p
Which is not working out. Instead of NodePort if i try with LoadBalancer, its creating a new ELB for me which is working as expected.
I am not sure if this is right approach for what i want to achieve here. Please help me out if there is a way for achieving same using the Ingress with NodePort.

Answer 1

Kubernetes Ingress as a generic concept does not solve the issue of exposing/routing TCP/UDP services, as stated in https://github.com/kubernetes/ingress-nginx/blob/master/docs/user-guide/exposing-tcp-udp-services.md you should use custom configmaps if you want that with ingress. And please mind that it will never use hostname for routing as that is a feature of HTTP, not TCP.

Answer 2

I succeded to access MariaDB/MySQL hosted on Google Kubernetes Engine through ingress-nginx, using the hostname specified in the ingress created for the database Cluster IP.
As per the docs, simply create the config map and expose the port in the Service defined for the Ingress.
This helped me to figure how to set --tcp-services-configmap and --udp-services-configmap flags.