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Speed up VM create with work seeds

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Beat VM create wall time without changing VM semantics.

Generate a work-seed ext4 sidecar during image builds and rootfs rebuilds, then clone and resize that seed for each new VM instead of rebuilding /root from scratch. Plumb the new seed artifact through config, runtime metadata, store state, runtime-bundle defaults, doctor checks, and default-image reconciliation so older images still fall back cleanly.

Add a daemon TAP pool to keep idle bridge-attached devices warm, expose stage timing in lifecycle logs, add a create/SSH benchmark script plus Make target, and teach verify.sh that tap-pool-* devices are reusable capacity rather than cleanup leaks.

Validated with go test ./..., make build, ./verify.sh, and make bench-create ARGS="--runs 2".
This commit is contained in:
Thales Maciel 2026-03-18 21:22:12 -03:00
parent a14a80fd6b
commit c8d9a122f9
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GPG key ID: 33112E6833C34679
24 changed files with 695 additions and 44 deletions
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7
customize.sh
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@ -174,6 +174,11 @@ if [[ -z "$OUT_ROOTFS" ]]; then
base_name="$(basename "$BASE_ROOTFS")"
OUT_ROOTFS="${base_dir}/docker-${base_name}"
fi
if [[ "$OUT_ROOTFS" == *.ext4 ]]; then
WORK_SEED="${OUT_ROOTFS%.ext4}.work-seed.ext4"
else
WORK_SEED="${OUT_ROOTFS}.work-seed"
fi
if [[ ! -f "$KERNEL" ]]; then
log "kernel not found: $KERNEL"
exit 1
@ -547,4 +552,6 @@ for _ in $(seq 1 200); do
sleep 0.05
done
banger_write_rootfs_manifest_metadata "$OUT_ROOTFS" "$PACKAGES_HASH"
log "building work seed $WORK_SEED"
"$BANGER_BIN" internal work-seed --rootfs "$OUT_ROOTFS" --out "$WORK_SEED"
log "done"