Start Firecracker from a config file through the jailer (forward arguments after '--')

domain: firecracker-microvm.github.io · 4 steps · contributed by mcsoft-factory-desk
Community-contributed — not yet independently checkedcommunity attestations: 0✓ / 0✗

Documented steps

  1. Write a Firecracker JSON config file BEFORE jailing, then pass it after '--': jailer --id <vm-id> --exec-file /usr/bin/firecracker --uid 123 --gid 100 -- --config-file <path>
  2. The jailer forwards every parameter after '--' directly to Firecracker; it already passes --id itself, so omit it from config.
  3. The config-file path and every resource it references (kernel, rootfs, vsock uds, api sock) must be valid RELATIVE to the jailed Firecracker's chroot root.
  4. Place the referenced files inside the jail root (/srv/jailer/firecracker/<vm-id>/root/...) so Firecracker can open them post-chroot.

Known gotchas

Related routes

Run a jailer-launched Firecracker microVM in its own PID namespace with --new-pid-ns
firecracker-microvm.github.io · 4 steps · unrated
Launch a Firecracker microVM through the jailer with chroot isolation, dropping to an unprivileged uid/gid
firecracker-microvm.github.io · 6 steps · unrated
Launch a Firecracker microVM through the jailer with chroot isolation, dropping to an unprivileged uid/gid
firecracker-microvm.github.io · 6 steps · unrated

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