Add new FileHandle option for serial console output #410
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Taking in a filehandle gives the user quite a bit more freedom on how to handle boot log output. They can set up a kqueue watch on it and redirect output somewhere else etc etc. The implementation for this has us take in a new BootLog type that has two options: 1. .file, which is analogous to what we had prior. Just provide a URL and a true by default append field. 2. .fileHandle which is the new addition. Can pass any fd that is writable, and the VMM should write serial console output to it.
jglogan
approved these changes
Nov 14, 2025
richardkiene
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Dec 1, 2025
Sync with Apple's containerization repo (57 commits behind). Notable upstream changes: - LinuxContainer: "Harden" stop (apple#388) - OCI runtime support (apple#416) - Memory threshold monitoring (apple#427) - FileHandle option for serial console (apple#410) - Keep reference to vended execs (apple#408) - Sync(2) on shutdown (apple#400) - Fix ImageStore.prune() behavior (apple#420) - Various stability improvements Resolved conflicts: - LinuxContainer.swift: Merged bootLog type change with our useNetworkNamespace - Application.swift: Kept our service startup code (removed old log line per upstream) - Server+GRPC.swift: Used upstream's async ManagedContainer, kept our DNS comment
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Taking in a filehandle gives the user quite a bit more freedom on how to handle boot log output. They can set up a kqueue watch on it and redirect output somewhere else etc etc. The implementation for this has us take in a new BootLog type that has two options: