mirror of
https://github.com/rcourtman/Pulse.git
synced 2026-10-26 13:39:47 +00:00
pulse-triage[bot]
e70e2c6430
Distinguish LXC/container memory charts from Pulse RSS, heap and virtual memory. Add a bounded five-counter sample with process identity readback, failure preservation and private-data cautions. Exercise the copied recipe with synthetic failures and an owned Linux child, preserving the existing CPU/write recipes. Change-source: pulse-maintainer Contract-Neutral: Documentation and executable recipe checks only; no runtime or public-contract delta.
210 lines
10 KiB
Python
210 lines
10 KiB
Python
#!/usr/bin/env python3
|
|
"""Exercise the copied resident-memory recipe, not a Pulse memory repair.
|
|
|
|
The fixture adapter runs real awk over synthetic status files. A separate
|
|
check reads only a disposable child process's live Linux counters; it does not
|
|
inspect a host service, database, heap or container daemon.
|
|
"""
|
|
|
|
from __future__ import annotations
|
|
|
|
import json
|
|
import os
|
|
from pathlib import Path
|
|
import re
|
|
import shutil
|
|
import subprocess
|
|
import sys
|
|
import tempfile
|
|
import unittest
|
|
|
|
|
|
ROOT = Path(__file__).resolve().parents[2]
|
|
DOC = ROOT / "docs/TROUBLESHOOTING.md"
|
|
COUNTERS = "VmRSS: 8192 kB\nRssAnon: 6144 kB\nRssFile: 1536 kB\nRssShmem: 512 kB\nVmSwap: 1024 kB\n"
|
|
IDENTITY = "4321 Tue Oct 6 00:00:00 2026"
|
|
|
|
|
|
def section() -> str:
|
|
return DOC.read_text(encoding="utf-8").split(
|
|
"#### Memory use keeps growing\n", 1
|
|
)[1].split("\n#### ", 1)[0]
|
|
|
|
|
|
def recipe() -> str:
|
|
blocks = re.findall(r"```bash\n(.*?)```", section(), re.DOTALL)
|
|
if len(blocks) != 1:
|
|
raise AssertionError("expected one bounded memory recipe")
|
|
return blocks[0]
|
|
|
|
|
|
READER = '''#!/usr/bin/env python3
|
|
import json, os, pathlib, subprocess, sys
|
|
name = pathlib.Path(sys.argv[0]).name
|
|
args = sys.argv[1:]
|
|
root = pathlib.Path(os.environ['RECIPE_FIXTURE'])
|
|
log = root / 'calls.jsonl'
|
|
previous = [json.loads(line) for line in log.read_text().splitlines()] if log.exists() else []
|
|
count = sum(call['name'] == name for call in previous)
|
|
with log.open('a') as stream:
|
|
stream.write(json.dumps({'name': name, 'args': args}) + '\\n')
|
|
if name == 'date':
|
|
assert args == ['-u', '+%Y-%m-%dT%H:%M:%SZ']
|
|
print('2026-10-06T00:00:00Z')
|
|
elif name == 'systemctl':
|
|
assert args == ['show', 'pulse', '--property=MainPID', '--value']
|
|
print(os.environ.get(f'PID_{count}', '4321'))
|
|
sys.exit(int(os.environ.get(f'SERVICE_EXIT_{count}', '0')))
|
|
elif name == 'ps':
|
|
assert args == ['-p', '4321', '-o', 'pid=,lstart=']
|
|
assert os.environ['TZ'] == 'UTC'
|
|
print(os.environ.get(f'IDENTITY_{count}', '4321 Tue Oct 6 00:00:00 2026'))
|
|
sys.exit(int(os.environ.get(f'PROCESS_EXIT_{count}', '0')))
|
|
elif name == 'awk':
|
|
assert args[-1] == '/proc/4321/status'
|
|
target = root / ('missing' if os.environ.get('STATUS_MISSING') else 'status')
|
|
sys.exit(subprocess.run([os.environ['REAL_AWK'], *args[:-1], str(target)]).returncode)
|
|
else:
|
|
raise AssertionError('unexpected command')
|
|
'''
|
|
|
|
|
|
class MemoryTroubleshootingDocsTest(unittest.TestCase):
|
|
def exercise(self, *, status: str = COUNTERS, copied: str | None = None,
|
|
**settings: str):
|
|
with tempfile.TemporaryDirectory() as temporary:
|
|
directory = Path(temporary)
|
|
for name in ("date", "systemctl", "ps", "awk"):
|
|
command = directory / name
|
|
command.write_text(READER, encoding="utf-8")
|
|
command.chmod(0o700)
|
|
(directory / "status").write_text(status, encoding="utf-8")
|
|
env = dict(os.environ, PATH=f"{directory}:{os.environ['PATH']}",
|
|
RECIPE_FIXTURE=str(directory), REAL_AWK=shutil.which("awk"), **settings)
|
|
result = subprocess.run(["bash", "-c", copied if copied is not None else recipe()],
|
|
env=env, text=True, capture_output=True, timeout=10)
|
|
calls = [json.loads(line) for line in (directory / "calls.jsonl").read_text().splitlines()]
|
|
return result, calls
|
|
|
|
def assert_no_memory_claim(self, result):
|
|
self.assertNotEqual(result.returncode, 0)
|
|
self.assertNotIn("Pulse process (PID and UTC start)", result.stdout)
|
|
self.assertNotRegex(result.stdout, r"VmRSS:|RssAnon:|RssFile:|RssShmem:|VmSwap:")
|
|
|
|
def test_shipped_guide_is_the_exercised_source_and_shell_is_valid(self):
|
|
self.assertEqual(DOC.read_bytes(),
|
|
(ROOT / "frontend-modern/public/docs/TROUBLESHOOTING.md").read_bytes())
|
|
result = subprocess.run(["bash", "-n"], input=recipe(), text=True, capture_output=True)
|
|
self.assertEqual(result.returncode, 0, result.stderr)
|
|
|
|
def test_only_five_counters_and_stable_process_identity_leave_the_reader(self):
|
|
result, calls = self.exercise(status="Name: private-workload\nUid: 1001 1001\n"
|
|
+ COUNTERS + "VmSize: 1234567 kB\nThreads: 19\n")
|
|
self.assertEqual(result.returncode, 0, result.stderr)
|
|
self.assertIn("2026-10-06T00:00:00Z", result.stdout)
|
|
self.assertIn(IDENTITY, result.stdout)
|
|
self.assertIn(COUNTERS, result.stdout)
|
|
for private in ("private-workload", "Uid:", "VmSize:", "Threads:"):
|
|
self.assertNotIn(private, result.stdout)
|
|
self.assertEqual([call["name"] for call in calls],
|
|
["date", "systemctl", "ps", "awk", "systemctl", "ps"])
|
|
|
|
def test_missing_or_invalid_pid_stops_before_a_process_read(self):
|
|
for pid in ("", "0", "not-a-pid", "4321 extra"):
|
|
with self.subTest(pid=pid):
|
|
result, calls = self.exercise(PID_0=pid)
|
|
self.assert_no_memory_claim(result)
|
|
self.assertIn("sample unavailable", result.stderr)
|
|
self.assertEqual([call["name"] for call in calls], ["date", "systemctl"])
|
|
|
|
def test_service_and_process_failures_remain_failures(self):
|
|
for key, names in (
|
|
("SERVICE_EXIT_0", ["date", "systemctl"]),
|
|
("PROCESS_EXIT_0", ["date", "systemctl", "ps"]),
|
|
("SERVICE_EXIT_1", ["date", "systemctl", "ps", "awk", "systemctl"]),
|
|
("PROCESS_EXIT_1", ["date", "systemctl", "ps", "awk", "systemctl", "ps"]),
|
|
):
|
|
with self.subTest(key=key):
|
|
result, calls = self.exercise(**{key: "3"})
|
|
self.assert_no_memory_claim(result)
|
|
self.assertEqual(result.returncode, 3)
|
|
self.assertEqual([call["name"] for call in calls], names)
|
|
|
|
def test_empty_initial_identity_is_not_a_complete_sample(self):
|
|
result, calls = self.exercise(IDENTITY_0="")
|
|
self.assert_no_memory_claim(result)
|
|
self.assertIn("identity unavailable", result.stderr)
|
|
self.assertNotIn("awk", [call["name"] for call in calls])
|
|
|
|
def test_missing_unreadable_or_incomplete_status_does_not_print_partial_counters(self):
|
|
for status, settings in ((COUNTERS, {"STATUS_MISSING": "1"}),
|
|
("", {}), (COUNTERS.replace("RssAnon: 6144 kB\n", ""), {})):
|
|
with self.subTest(status=status, settings=settings):
|
|
result, calls = self.exercise(status=status, **settings)
|
|
self.assert_no_memory_claim(result)
|
|
self.assertEqual([call["name"] for call in calls],
|
|
["date", "systemctl", "ps", "awk"])
|
|
|
|
def test_malformed_units_numbers_duplicates_and_extra_fields_fail_closed(self):
|
|
for value in ("-1 kB", "unknown kB", "1 MB", "1", "1 kB extra"):
|
|
with self.subTest(value=value):
|
|
result, _ = self.exercise(status=COUNTERS.replace("8192 kB", value))
|
|
self.assert_no_memory_claim(result)
|
|
result, _ = self.exercise(status=COUNTERS + "VmRSS: 8192 kB\n")
|
|
self.assert_no_memory_claim(result)
|
|
|
|
def test_service_restart_or_pid_reuse_discards_the_captured_counters(self):
|
|
for settings in ({"PID_1": "9999"}, {"PID_1": "0"},
|
|
{"IDENTITY_1": "4321 Tue Oct 6 00:00:01 2026"},
|
|
{"IDENTITY_1": ""}):
|
|
with self.subTest(settings=settings):
|
|
result, _ = self.exercise(**settings)
|
|
self.assert_no_memory_claim(result)
|
|
self.assertIn("discard this sample", result.stderr)
|
|
|
|
def test_measured_zero_is_retained_without_interpreting_missing_as_zero(self):
|
|
result, _ = self.exercise(status=re.sub(r"\d+ kB", "0 kB", COUNTERS))
|
|
self.assertEqual(result.returncode, 0, result.stderr)
|
|
self.assertEqual(result.stdout.count("0 kB"), 5)
|
|
|
|
@unittest.skipUnless(sys.platform.startswith("linux"), "Linux /proc recipe")
|
|
def test_real_linux_status_of_an_owned_disposable_process(self):
|
|
with tempfile.TemporaryDirectory() as temporary:
|
|
directory = Path(temporary)
|
|
child = subprocess.Popen([sys.executable, "-c", "import time; time.sleep(30)"])
|
|
try:
|
|
command = directory / "systemctl"
|
|
command.write_text("#!/bin/sh\nprintf '%s\\n' \"$RECIPE_CHILD_PID\"\n", encoding="utf-8")
|
|
command.chmod(0o700)
|
|
env = dict(os.environ, PATH=f"{directory}:{os.environ['PATH']}",
|
|
RECIPE_CHILD_PID=str(child.pid))
|
|
result = subprocess.run(["bash", "-c", recipe()], env=env,
|
|
text=True, capture_output=True, timeout=10)
|
|
self.assertEqual(result.returncode, 0, result.stderr)
|
|
self.assertIn("Pulse process (PID and UTC start)", result.stdout)
|
|
for field in ("VmRSS", "RssAnon", "RssFile", "RssShmem", "VmSwap"):
|
|
self.assertRegex(result.stdout, rf"(?m)^{field}:\s+[0-9]+ kB$")
|
|
self.assertNotIn("Name:", result.stdout)
|
|
self.assertNotIn("Uid:", result.stdout)
|
|
finally:
|
|
child.terminate()
|
|
child.wait(timeout=5)
|
|
|
|
def test_guidance_distinguishes_scope_units_and_unsafe_shortcuts(self):
|
|
guide = " ".join(section().split())
|
|
for phrase in ("container, not just Pulse", "own cache accounting", "Go heap size",
|
|
"inside the Pulse container", "in both `systemctl` calls",
|
|
"1,024 bytes", "approximate and not an atomic snapshot",
|
|
"not specifically the Go heap", "different run",
|
|
"do not measure Pulse RSS", "do not assume its PID 1 is Pulse",
|
|
"Do not restart Pulse, drop caches, force garbage collection",
|
|
"Do not post a heap dump", "existing screenshots remain useful"):
|
|
self.assertIn(phrase, guide)
|
|
self.assertNotRegex(recipe(),
|
|
r"\b(?:sudo|restart|kill|rm|truncate|sqlite3|curl|printenv|cat)\b"
|
|
r"|--follow|--token|cmdline|environ|smaps")
|
|
|
|
|
|
if __name__ == "__main__":
|
|
unittest.main()
|