Rancher / k8 / azure / Kubectl - azure

Question

I have a mysql pod in my cluster that I want to expose to a public IP. Therefor I changed it to be a loadbalancer by doing
kubectl edit svc mysql-mysql --namespace mysql
release: mysql
name: mysql-mysql
namespace: mysql
resourceVersion: "646616"
selfLink: /api/v1/namespaces/mysql/services/mysql-mysql
uid: cd1cce11-890c-11e8-90f5-869c0c4ba0b5
spec:
clusterIP: 10.0.117.54
externalTrafficPolicy: Cluster
ports:
- name: mysql
nodePort: 31479
port: 3306
protocol: TCP
targetPort: 3306
selector:
app: mysql-mysql
sessionAffinity: None
type: LoadBalancer
status:
loadBalancer:
ingress:
- ip: 137.117.40.121
changing ClusterIP to LoadBalancer.
However I can't seem to reach it by going to mysql -h137.117.40.121 -uroot -p*****
Anyone have any idea? Is it because i'm trying to forward it over TCP?

Answer 1

For your issue, you want to expose your mysql pod to a public IP. So you need to take a look at Ingress in Kubernets. It's an API object that manages external access to the services in a cluster, typically HTTP. For the Ingress, you need both ingress controller and ingress rules. For more details, you can read the document I posted.
In Azure, you can get more details from HTTPS Ingress on Azure Kubernetes Service (AKS).

Answer 2

As pointed out by #aurelius, your config seems correct it's possible that the traffic is getting blocked by your firewall rules.
Also make sure, the cloud provider option is enabled for your cluster.
kubectl get svc -o wide would show the status of the LoadBalancer and the IP address allocated.
#charles-xu-msft, using Ingress is definitely an option but there is nothing wrong in using LoadBalancer kind of Service when the cloud provider is enabled for the kubernetes cluster.
Just for reference, here is test config:
apiVersion: v1
kind: Pod
metadata:
name: mysql-pod
labels:
name: mysql-pod
spec:
containers:
- name: mysql:5
image: mysql
ports:
- containerPort: 3306
env:
- name: MYSQL_ROOT_PASSWORD
value: mysqlpassword
---
apiVersion: v1
kind: Service
metadata:
name: test-mysql-lb
spec:
type: LoadBalancer
ports:
- port: 3306
targetPort: 3306
protocol: TCP
selector:
name: mysql-pod