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fix(1d): custom-html backup/restore overlay reads marker via exec (volume-direct)

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http_fetch raced the serving layer right after backup-bot cycled the app container (served '' for a
moment). Backup/restore preserve the VOLUME, so read the marker in-container via exec_in_app — correct
and race-free. Serving is proven separately by install/upgrade assert_serving.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
This commit is contained in:
autonomic-bot
2026-05-28 00:10:35 +01:00
parent feb6f80d50
commit b758767830
2 changed files with 22 additions and 9 deletions
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19
tests/custom-html/test_backup.py
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@ -1,6 +1,11 @@
"""custom-html — BACKUP overlay (Phase 1d, DG4): seed a known state, back it up (assert artifact),
then mutate so the RESTORE overlay (test_restore.py) can prove the backed-up state returns. Runs on
the shared deployment; the marker it leaves ("mutated") persists for the restore tier."""
the shared deployment; the marker it leaves ("mutated") persists for the restore tier.
Reads the marker via `exec_in_app` (the file in the volume), NOT http: backup/restore preserve the
VOLUME, and reading it directly is immune to the serving/container-routing race right after
backup-bot-two cycles the app container (HTTP briefly served empty). Serving is proven separately by
the install/upgrade tiers' assert_serving."""
import os
import sys
@ -11,15 +16,19 @@ from harness import generic, lifecycle # noqa: E402
MARKER_PATH = "/usr/share/nginx/html/ci-marker.txt"
def _marker(domain: str) -> str:
return lifecycle.exec_in_app(domain, ["cat", MARKER_PATH]).strip()
def test_backup_captures_state(live_app, meta):
domain = live_app
# 1) establish a known original state, then back it up (reuse the generic op: backup + assert
# a snapshot artifact was produced)
# 1) establish a known original state, then back it up (reuse the generic op: backup + assert a
# snapshot artifact was produced)
lifecycle.exec_in_app(domain, ["sh", "-c", f"echo original > {MARKER_PATH}"])
assert lifecycle.http_fetch(domain, "/ci-marker.txt")[1].strip() == "original"
assert _marker(domain) == "original"
snap = generic.do_backup(domain)
assert snap, "backup produced no snapshot artifact"
# 2) mutate state so a successful restore is observable (diverge from the backup)
lifecycle.exec_in_app(domain, ["sh", "-c", f"echo mutated > {MARKER_PATH}"])
assert lifecycle.http_fetch(domain, "/ci-marker.txt")[1].strip() == "mutated"
assert _marker(domain) == "mutated"