KOPS vs Kubeadm vs Kubespray

All three are are setting up Kubernetes clusters, but each is intended for different use cases

Service	Usage	Links
kops	For setting up K8 clusters in cloud environments. Integrating with AWS, GCP, etc
kubeadm	Meant to be a minimum production ready installation of K8s. It contains no tools for handling infrastructure it is running on
kubespray	A production ready deployment meant to be generic and work on all kinds of environments from bare-metal to cloud. Includes handling and creation of infrastructure for its deployment. Uses Ansible to automate provisioning of infrastructure and components