Conecting to a specific pod inside a statefulset from outside the cluster - kubernetes

Question

I have a StatefulSet that matchs the one described in the
StatefulSet Kubernetes tutorial which creates a mysql master/slaves structure. I have the following kubernetes objects:
NAME READY STATUS RESTARTS AGE
pod/mysql-0 2/2 Running 7 23h
pod/mysql-1 2/2 Running 6 23h
pod/mysql-2 2/2 Running 6 23h
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
service/kubernetes ClusterIP 10.152.183.1 <none> 443/TCP 21d
service/mysql ClusterIP None <none> 3306/TCP 23h
service/mysql-read ClusterIP 10.152.183.89 <none> 3306/TCP 23h
NAME READY AGE
statefulset.apps/mysql 3/3 23h
EDIT: The mysql and mysql-read services connect with all the mysql pods.
The node is on my computer, I'm using microk8s.
Now I have a little program runnning on my computer (not in the cluster) that I would like to connect to the master (mysql-0) inside the StatefulSet. Id need something like a service that only connect with mysql-0. Any suggestions on how to do it?
EDIT: The idea is to find a solution that allow me to deploy the cluster just with the .yaml files. It isn't interesting to find one that involves more commands than kubectl apply
The program is the following one:
import mysql.connector
mydb = mysql.connector.connect(
host="localhost??",
user="root",
passwd="",
database="testtable"
)
mycursor = mydb.cursor()
sql = "INSERT INTO testtable (name) VALUES (%s)"
val = ("holaquetal")
mycursor.execute(sql, val)
mydb.commit()
I thought I could add a different label to the mysql-0 pod and add a NodePort service that looks for that label, but I dont want to do it by command line. Is it possible to add one label to mysql-0 inside the StatefulSet yaml?
Another idea could be to do a query DNS to the DNS server that microk8s provides, looking for "mysql.mysql-0", but I don't know how to connect the program to the DNS server, so that I can use host=mysql.mysql-0 or the whole CNAME.

Answer 1

If the node is on your computer so can use port-forward to forward the port of mysql from the pod to your local. Try this:
kubectl port-forward mysql-0 3306:3306
or forward directly to your master service
kubectl port-forward svc/mysql-read 3306:3306