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Always clean stale taps before creating new ones

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deleteTap before createTap in all four call sites:
snapshot restore, cold boot, agent start, snapshot create.
Prevents "Device or resource busy" from leftover taps.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
This commit is contained in:
ansible
2026-04-07 16:07:24 +00:00
parent 6485705d4b
commit cf2d2d31b7
3 changed files with 4 additions and 0 deletions
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1
src/agent-manager.ts
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@@ -268,6 +268,7 @@ export async function startAgent(
// Setup network // Setup network
ensureBridge(); ensureBridge();
ensureNat(); ensureNat();
deleteTap(tapDevice); // clean stale tap from previous run
createTap(tapDevice); createTap(tapDevice);
// Boot VM // Boot VM

1
src/snapshot.ts
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@@ -63,6 +63,7 @@ export async function createSnapshot() {
log("Setting up network..."); log("Setting up network...");
ensureBridge(); ensureBridge();
ensureNat(); ensureNat();
deleteTap(snap.tapDevice); // clean stale tap from previous run
createTap(snap.tapDevice); createTap(snap.tapDevice);
let proc: ChildProcess | null = null; let proc: ChildProcess | null = null;

2
src/vm.ts
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@@ -78,6 +78,7 @@ export class VMInstance {
log(verbose, `VM ${id}: restoring from snapshot...`); log(verbose, `VM ${id}: restoring from snapshot...`);
ensureBridge(); ensureBridge();
ensureNat(); ensureNat();
deleteTap(snap.tapDevice); // clean stale tap from previous run
createTap(snap.tapDevice); createTap(snap.tapDevice);
// Spawn firecracker and load snapshot // Spawn firecracker and load snapshot
@@ -155,6 +156,7 @@ export class VMInstance {
log(verbose, `VM ${id}: creating tap ${tapDevice}...`); log(verbose, `VM ${id}: creating tap ${tapDevice}...`);
ensureBridge(); ensureBridge();
ensureNat(); ensureNat();
deleteTap(tapDevice); // clean stale tap from previous run
createTap(tapDevice); createTap(tapDevice);
log(verbose, `VM ${id}: booting...`); log(verbose, `VM ${id}: booting...`);