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Traditionally, the container runtime has offered very poor isolation ensures, Conill says. “I feel we’ve gotten to a degree the place folks simply don’t perceive how these elements come collectively, and suppose that namespaces present true isolation,” she mentioned. “They will’t, as a result of they exist as a subset of the shared kernel state.”
Slippery Linux namespaces
Linux namespaces permit containers to contend for underlying sources in multi-tenant environments. However whereas the container-to-Kubernetes handshake requires the pliability to position workloads side-by-side on varied Linux hosts throughout clusters, Linux namespaces had been by no means supposed to function safety boundaries. Which is why container runtime assaults and container escapes are so prevalent.
“Primarily Styrolite is just like a container runtime interface (CRI) however targeted on the containers’ precise interactions with the kernel,” Conill says. “Styrolite focuses on securing the basics of how photographs get mounted into namespaces in areas like timekeeping, mounts, and course of collections within the course of ID namespace.”
