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Learn about SELinux namespaces, a proposed feature enhancement designed to enable per-container security policies in this 45-minute conference talk from the Linux Foundation. Explore the background and motivation behind SELinux namespaces, understanding how current SELinux limitations restrict container security to coarse-grained sandboxing of entire containers. Discover the technical design and implementation details of SELinux namespaces that would allow each namespace to load its own security policy while remaining confined by parent and ancestor policies. Examine the performance implications and benefits this enhancement would bring to Linux developers and users, particularly enabling full SELinux functionality within containers regardless of whether the host operating system uses SELinux. Gain insights into the residual challenges and ongoing work required to integrate SELinux namespaces into the mainline Linux kernel, addressing the growing need for better container security in cloud-native and containerized application environments.
