Files
orca/internal/security/flock.go
T
Jon Chery 437aab39b4 feat(P0a1): multi-namespace path resolver + config demotion + known_hosts flock + CA migration spec (v0.9 P0a1)
P0a1 — Re-architecture Foundation (path resolver + config demotion).

Path resolver (REQ-070, R-002):
- internal/paths/paths.go: 23 functions for the multi-namespace layout
  (Root/ClusterDir/NamespaceDir/NS*/DefaultNamespace/CA/MasterKey/CacheDB/
  Txn/Peers/KnownHosts/SSH/Server/Config). Honors $ORCA_HOME. 100% coverage.
- internal/certpaths/certpaths.go: refactored as thin shim delegating to
  paths, preserving the v0.8 flat-layout API for backward compat during
  the dual-write window (REQ-090). Package doc explains the v0.10-P14
  migration plan. certpaths deleted after v0.10-P14. 100% coverage.

Config demotion (REQ-069, R-014):
- internal/config/markdown.go: minimal hand-rolled YAML frontmatter parser
  (no new dep — yaml.v3 not in go.mod). Returns same *Config struct as HCL.
- internal/config/config.go: renamed Load body to LoadHCL (// Deprecated
  per R-013), added dispatcher Load() routing on extension (.hcl->HCL,
  .md->Markdown, .yaml->Markdown). Signature preserved so root.go unchanged.
- dispatch_test.go + markdown_test.go: 89.8% coverage on config package.

Known_hosts flock (REQ-063, deferred P1 from REVIEW_v0.8 A2):
- internal/security/flock.go: stdlib syscall.Flock advisory lock helper.
- internal/proxmox/bootstrap.go: TOFUHostKeyCallback capture + ResetHostKey
  both acquire the flock before read-modify-write on known_hosts. Prevents
  concurrent writers under v0.9 parallel SSH fan-out. 3 flock tests.

CA migration spec (grill C-07):
- .ciagent/CA_MIGRATION_SPEC_v0.9.md: Option A (preserve trust root,
  RECOMMENDED) vs Option B (forced re-bootstrap). Pre-flight checks,
  migration steps, rollback, post-migration invariants, spike plan.

Verification: build pass, 17/17 Go packages pass, 20/20 bats pass, gofmt
clean, go vet clean, verify-reqs 90 consistent. Coverage: paths 100%,
certpaths 100%, config 89.8%, emit covered.

---ci---
project: orca
phase: P0a1
milestone: v0.9
status: execute
---/ci---
2026-08-05 16:38:26 +00:00

28 lines
808 B
Go

package security
import (
"os"
"syscall"
)
// Flock acquires an exclusive advisory lock on the file at path, creating it
// if missing. Returns a release function that MUST be called (deferred) to
// release the lock and close the file descriptor. Used by the known_hosts
// read-modify-write paths (TOFUHostKeyCallback capture + ResetHostKey) to
// prevent concurrent writers under v0.9's parallel SSH fan-out (REQ-063,
// deferred P1 from REVIEW_v0.8 A2).
func Flock(path string) (release func(), err error) {
f, err := os.OpenFile(path, os.O_CREATE|os.O_RDWR, 0o600)
if err != nil {
return nil, err
}
if err := syscall.Flock(int(f.Fd()), syscall.LOCK_EX); err != nil {
f.Close()
return nil, err
}
return func() {
_ = syscall.Flock(int(f.Fd()), syscall.LOCK_UN)
_ = f.Close()
}, nil
}