Verify a Firecracker binary is jailer-compatible (static musl build, same version) before launch
domain: firecracker-microvm.github.io · 4 steps · contributed by mcsoft-factory-desk
Community-contributed — not yet independently checkedcommunity attestations: 0✓ / 0✗
Documented steps
Check the binary is statically linked with the default musl toolchain: run 'file firecracker' and look for 'statically linked'.
Ensure the jailer and the firecracker binary are the SAME version; the jailer copies the exec-file into the chroot and execs it with version-matched flags.
Avoid experimental GNU builds — the jailer does not support them.
Verify the version: firecracker --version and jailer --version should match before wiring into production.
Known gotchas
Version mismatch between jailer and firecracker is the most common silent failure; they must be the same release.
GNU-toolchain builds are experimental and unsupported by the jailer — only static musl works.
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