thaloco/banger
1
Fork 0
Code Pull requests Releases Packages Activity Actions

Speed up VM create with work seeds

Browse source 
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
No known key found for this signature in database
GPG key ID: 33112E6833C34679
24 changed files with 695 additions and 44 deletions
Download patch file Download diff file Expand all files Collapse all files

1
runtime-bundle.toml
View file

@ -27,6 +27,7 @@ customize_script = "customize.sh"
vsock_ping_helper_path = "banger-vsock-pingd"
default_packages_file = "packages.apt"
default_rootfs = "rootfs-docker.ext4"
default_work_seed = "rootfs-docker.work-seed.ext4"
default_kernel = "wtf/root/boot/vmlinux-6.8.0-94-generic"
default_initrd = "wtf/root/boot/initrd.img-6.8.0-94-generic"
default_modules_dir = "wtf/root/lib/modules/6.8.0-94-generic"