dockersh vs Rancher Fleet: What are the differences?

dockersh: A shell which places users into individual docker containers. dockersh is designed to be used as a login shell on machines with multiple interactive users. When a user invokes dockersh, it will bring up a Docker container (if not already running), and then spawn a new interactive shell in the container's namespace; Rancher Fleet: Manage large fleets of Kubernetes clusters. It is a Kubernetes cluster fleet controller specifically designed to address the challenges of running thousands to millions of clusters across the world. While it's designed for massive scale the concepts still apply for even small deployments of less than 10 clusters. It is lightweight enough to run on the smallest of deployments too and even has merit in a single node cluster managing only itself.

dockersh and Rancher Fleet can be primarily classified as "Container" tools.

dockersh and Rancher Fleet are both open source tools. It seems that dockersh with 1.3K GitHub stars and 83 forks on GitHub has more adoption than Rancher Fleet with 338 GitHub stars and 22 GitHub forks.