A wildcard certificate can secure any number of subdomains of a base domain (e.g. *.example.com). This allows to use a single certificate and key pair for a domain and all of its subdomains, which can make HTTPS deployment significantly easier. Let's Encrypt wildcard certificates
Minio is an open source S3 compatible object store that can be installed on a Kubernetes cluster. Learn how to use a combination of Kubespray and Ansible to provision a cluster and deploy Minio as a private cloud storage.