How to access mysql pod in another pod(busybox)?

Question

I am given a task of connecting mysql pod with any other working pod(preferably busybox) but was not able to that. Is there a way to do this task. I referred many places but the explanations was bit complicated as I am new to Kubernetes.

Answer 1

MySQL YAML config for Kubernets

apiVersion: v1
kind: Service
metadata:
  name: mysql
spec:
  ports:
  - port: 3306
  selector:
    app: mysql
  clusterIP: None
---
apiVersion: apps/v1
kind: Deployment
metadata:
  name: mysql
spec:
  selector:
    matchLabels:
      app: mysql
  strategy:
    type: Recreate
  template:
    metadata:
      labels:
        app: mysql
    spec:
      containers:
      - image: mysql:5.6
        name: mysql
        env:
          # Use secret in real usage
        - name: MYSQL_ROOT_PASSWORD
          value: password
        ports:
        - containerPort: 3306
          name: mysql
        volumeMounts:
        - name: mysql-persistent-storage
          mountPath: /var/lib/mysql
      volumes:
      - name: mysql-persistent-storage
        persistentVolumeClaim:
          claimName: mysql-pv-claim

you can use the service name to connect with the MySQL from busy box container

kubectl run -i --tty mysql-client --image=mysql --restart=Never -- sh   

above command will start one container of Mysql as client.

run kubectl get pods to check both pod status.

In Mysql-client container you will be able to run the command to connect with the MySQL

mysql -h <MySQL service name> -u <Username> -p<password>

Ref doc : MySQL : https://kubernetes.io/blog/2015/10/some-things-you-didnt-know-about-kubectl_28/