$ kubectl exec -it mariadb-deployment-5465c6655c-7jfqm env |grep MYSQL
MYSQL_PASSWORD=kube-still-rocks
MYSQL_USER=kubeuser
MYSQL_ROOT_PASSWORD=KubernetesRocks!

$ kubectl exec -it mariadb-deployment-5465c6655c-7jfqm ls /etc/mysql/conf.d
max_allowed_packet.cnf

$ kubectl exec -it mariadb-deployment-5465c6655c-7jfqm cat /etc/mysql/conf.d/max_allowed_packet.cnf
[mysqld]
max_allowed_packet = 64M
