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

36
internal/daemon/logger.go
View file

@ -35,14 +35,16 @@ func parseLogLevel(raw string) (slog.Level, string, error) {
}
}
func (d *Daemon) beginOperation(name string, attrs ...any) operationLog {
func (d *Daemon) beginOperation(name string, attrs ...any) *operationLog {
if d.logger != nil {
d.logger.Info("operation started", append([]any{"operation", name}, attrs...)...)
}
return operationLog{
now := time.Now()
return &operationLog{
logger: d.logger,
name: name,
started: time.Now(),
started: now,
last: now,
attrs: append([]any(nil), attrs...),
}
}
@ -51,22 +53,35 @@ type operationLog struct {
logger *slog.Logger
name string
started time.Time
last time.Time
attrs []any
}
func (o operationLog) stage(stage string, attrs ...any) {
o.log(slog.LevelInfo, "operation stage", append([]any{"stage", stage}, attrs...)...)
func (o *operationLog) stage(stage string, attrs ...any) {
now := time.Now()
o.log(slog.LevelInfo, "operation stage", append([]any{
"stage", stage,
"since_start_ms", now.Sub(o.started).Milliseconds(),
"since_last_stage_ms", now.Sub(o.last).Milliseconds(),
}, attrs...)...)
o.last = now
}
func (o operationLog) debugStage(stage string, attrs ...any) {
o.log(slog.LevelDebug, "operation stage", append([]any{"stage", stage}, attrs...)...)
func (o *operationLog) debugStage(stage string, attrs ...any) {
now := time.Now()
o.log(slog.LevelDebug, "operation stage", append([]any{
"stage", stage,
"since_start_ms", now.Sub(o.started).Milliseconds(),
"since_last_stage_ms", now.Sub(o.last).Milliseconds(),
}, attrs...)...)
o.last = now
}
func (o operationLog) done(attrs ...any) {
func (o *operationLog) done(attrs ...any) {
o.log(slog.LevelInfo, "operation completed", append([]any{"duration_ms", time.Since(o.started).Milliseconds()}, attrs...)...)
}
func (o operationLog) fail(err error, attrs ...any) error {
func (o *operationLog) fail(err error, attrs ...any) error {
if err == nil {
return nil
}
@ -118,6 +133,9 @@ func imageLogAttrs(image model.Image) []any {
if image.RootfsPath != "" {
attrs = append(attrs, "rootfs_path", image.RootfsPath)
}
if image.WorkSeedPath != "" {
attrs = append(attrs, "work_seed_path", image.WorkSeedPath)
}
return attrs
}