Answer
Rootless mode uses user namespaces and slower unprivileged I/O.
Quick Answer
Rootless Docker runs the daemon and containers as a non-root user using user namespace remapping. This improves security but trades off performance: user namespace UID/GID mapping adds syscall overhead, some storage drivers aren't fully supported, and nested namespaces have restrictions. Worth it in multi-tenant or high-security environments.
S
SugharaIQ Editorial Team
Verified Answer
This answer has been peer-reviewed by industry experts holding senior engineering roles to ensure technical accuracy and relevance for modern interview standards.
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Source: SugharaIQ