Rocket

Rocket is another container runtime tool from CoreOS. It emerged to address security vulnerabilities in early versions of Docker. Rocket is another possibility or choice to Docker, with the most resolved security, composability, speed, and production requirements. Rocket has built things differently to Docker in many aspects. The main difference is that Docker runs a central daemon with root privileges and spins off a new container as its sub process, whereas Rocket never spins a container with root privileges. However, Docker always recommends running containers within SELinux or AppArmor. Since then, Docker has come up with many solutions to tackle the flaws.