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refactor: remove Go envd module, update host agent for Rust envd

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The Go envd guest agent (`envd/`) is fully replaced by the Rust
implementation (`envd-rs/`). This commit removes the Go module and
updates all references across the codebase.

Makefile: remove ENVD_DIR, VERSION_ENVD, build-envd-go, dev-envd-go,
and Go envd from proto/fmt/vet/tidy/clean targets. Add static-link
verification to build-envd.

Host agent: rewrite snapshot quiesce comments that referenced Go GC
and page allocator corruption — no longer applicable with Rust envd.
Tighten envdclient to expect HTTP 200 (not 204) from health and file
upload endpoints, and require JSON version response from FetchVersion.

Remove NOTICE (no e2b-derived code remains). Update CLAUDE.md and
README.md to reflect Rust envd architecture.
This commit is contained in:
Rafeed M. Bhuiyan
2026-05-03 03:12:25 +06:00
parent 0b53d34417
commit 1143acd37a
109 changed files with 49 additions and 20665 deletions
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9
internal/envdclient/client.go
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@ -250,7 +250,7 @@ func (c *Client) WriteFile(ctx context.Context, path string, content []byte) err
respBody, _ := io.ReadAll(resp.Body)
if resp.StatusCode != http.StatusOK && resp.StatusCode != http.StatusNoContent {
if resp.StatusCode != http.StatusOK {
return fmt.Errorf("write file %s: status %d: %s", path, resp.StatusCode, string(respBody))
}
@ -292,10 +292,9 @@ func (c *Client) ReadFile(ctx context.Context, path string) ([]byte, error) {
return data, nil
}
// PrepareSnapshot calls envd's POST /snapshot/prepare endpoint, which quiesces
// continuous goroutines (port scanner, forwarder) and forces a GC cycle before
// Firecracker takes a VM snapshot. This ensures the Go runtime's page allocator
// is in a consistent state when vCPUs are frozen.
// PrepareSnapshot calls envd's POST /snapshot/prepare endpoint, which stops
// the port scanner/forwarder and marks active connections for post-restore
// cleanup before Firecracker freezes vCPUs.
//
// Best-effort: the caller should log a warning on error but not abort the pause.
func (c *Client) PrepareSnapshot(ctx context.Context) error {