make so-yaml PG-canonical and add pillar-change reactor stack

Two coupled changes that together let so_pillar.* be the canonical
config store, with config edits driving service reloads automatically:

so-yaml PG-canonical mode
- Adds /opt/so/conf/so-yaml/mode (and SO_YAML_BACKEND env override) with
  three values: dual (legacy), postgres (PG-only for managed paths),
  disk (emergency rollback). Bootstrap files (secrets.sls, ca/init.sls,
  *.nodes.sls, top.sls, ...) stay disk-only regardless via the existing
  SkipPath allowlist in so_yaml_postgres.locate.
- loadYaml/writeYaml/purgeFile now route to so_pillar.* in postgres
  mode: replace/add/get all read+write the database with no disk file
  ever appearing. PG failure is fatal in postgres mode (no silent
  fallback); dual mode preserves the prior best-effort mirror.
- so_yaml_postgres gains read_yaml(path), is_pg_managed(path), and
  is_enabled() so so-yaml can answer "is this path PG-managed and is
  PG up" without reaching into private helpers.
- schema_pillar.sls writes /opt/so/conf/so-yaml/mode = postgres after
  the importer succeeds, so flipping postgres:so_pillar:enabled flips
  so-yaml's behavior in lockstep with the schema being live.

pg_notify-driven change fan-out
- 008_change_notify.sql adds so_pillar.change_queue + an AFTER trigger
  on pillar_entry that enqueues the locator and pg_notifies
  'so_pillar_change'. Queue is drained at-least-once so engine restarts
  don't lose events; pg_notify is just the wakeup signal.
- New salt-master engine pg_notify_pillar.py LISTENs on the channel,
  drains the queue with FOR UPDATE SKIP LOCKED, debounces bursts, and
  fires 'so/pillar/changed' events grouped by (scope, role, minion).
- Reactor so_pillar_changed.sls catches the tag and dispatches to
  orch.so_pillar_reload, which carries a DISPATCH map of pillar-path
  prefix -> (state sls, role grain set) so adding a new service to
  the auto-reload list is a one-line edit instead of a new reactor.
- Engine + reactor wiring is gated on the same postgres:so_pillar:enabled
  flag as the schema and ext_pillar config so the whole stack flips
  on/off together.

Tests: 21 new cases (112 total, all passing) covering mode resolution,
PG-managed detection, and PG-canonical read/write/purge routing with
the PG client stubbed.
This commit is contained in:
Mike Reeves
2026-05-01 09:31:48 -04:00
parent 23255f88e0
commit 3d11694d51
13 changed files with 958 additions and 11 deletions
+211
View File
@@ -1106,3 +1106,214 @@ class TestSoYamlPostgres(unittest.TestCase):
{"soc": {"foo": "bar"}})
self.assertFalse(ok)
self.assertEqual(msg, "postgres unreachable")
def test_is_pg_managed_true(self):
self.assertTrue(self.mod.is_pg_managed(
"/opt/so/saltstack/local/pillar/minions/h1_sensor.sls"))
self.assertTrue(self.mod.is_pg_managed(
"/opt/so/saltstack/local/pillar/soc/soc_soc.sls"))
def test_is_pg_managed_false_for_bootstrap(self):
self.assertFalse(self.mod.is_pg_managed(
"/opt/so/saltstack/local/pillar/secrets.sls"))
self.assertFalse(self.mod.is_pg_managed(
"/opt/so/saltstack/local/pillar/postgres/auth.sls"))
self.assertFalse(self.mod.is_pg_managed(
"/opt/so/saltstack/local/pillar/elasticsearch/nodes.sls"))
def test_read_yaml_unreachable(self):
with patch.object(self.mod, '_is_enabled', return_value=False):
self.assertIsNone(self.mod.read_yaml(
"/opt/so/saltstack/local/pillar/soc/soc_soc.sls"))
def test_read_yaml_skips_disk_only(self):
with patch.object(self.mod, '_is_enabled', return_value=True):
with self.assertRaises(self.mod.SkipPath):
self.mod.read_yaml(
"/opt/so/saltstack/local/pillar/secrets.sls")
def test_read_yaml_returns_data(self):
with patch.object(self.mod, '_is_enabled', return_value=True):
with patch.object(self.mod, '_docker_psql',
return_value='{"soc": {"foo": "bar"}}\n'):
data = self.mod.read_yaml(
"/opt/so/saltstack/local/pillar/soc/soc_soc.sls")
self.assertEqual(data, {"soc": {"foo": "bar"}})
def test_read_yaml_returns_none_when_no_row(self):
with patch.object(self.mod, '_is_enabled', return_value=True):
with patch.object(self.mod, '_docker_psql', return_value=''):
data = self.mod.read_yaml(
"/opt/so/saltstack/local/pillar/soc/soc_soc.sls")
self.assertIsNone(data)
def test_read_yaml_minion_query_shape(self):
captured = {}
def fake_psql(sql):
captured['sql'] = sql
return '{"host": {"mainip": "10.0.0.1"}}'
with patch.object(self.mod, '_is_enabled', return_value=True):
with patch.object(self.mod, '_docker_psql', side_effect=fake_psql):
data = self.mod.read_yaml(
"/opt/so/saltstack/local/pillar/minions/h1_sensor.sls")
self.assertEqual(data, {"host": {"mainip": "10.0.0.1"}})
self.assertIn("scope='minion'", captured['sql'])
self.assertIn("'h1_sensor'", captured['sql'])
self.assertIn("'minions.h1_sensor'", captured['sql'])
def test_is_enabled_public_alias(self):
with patch.object(self.mod, '_is_enabled', return_value=True):
self.assertTrue(self.mod.is_enabled())
with patch.object(self.mod, '_is_enabled', return_value=False):
self.assertFalse(self.mod.is_enabled())
class TestSoYamlBackendMode(unittest.TestCase):
"""Tests so-yaml's backend-mode resolution and PG-canonical routing
for read/write/purge. The PG calls themselves are stubbed; what we're
asserting is that the right backend is chosen for each (mode, path)
combination."""
def test_resolve_mode_env_overrides_file(self):
with patch.dict('os.environ', {'SO_YAML_BACKEND': 'postgres'}):
self.assertEqual(soyaml._resolveBackendMode(), 'postgres')
with patch.dict('os.environ', {'SO_YAML_BACKEND': 'disk'}):
self.assertEqual(soyaml._resolveBackendMode(), 'disk')
def test_resolve_mode_invalid_env_falls_back(self):
with patch.dict('os.environ', {'SO_YAML_BACKEND': 'garbage'}, clear=False):
with patch('builtins.open', side_effect=IOError):
self.assertEqual(soyaml._resolveBackendMode(), 'dual')
def test_resolve_mode_default_dual(self):
env = {k: v for k, v in __import__('os').environ.items()
if k != 'SO_YAML_BACKEND'}
with patch.dict('os.environ', env, clear=True):
with patch('builtins.open', side_effect=IOError):
self.assertEqual(soyaml._resolveBackendMode(), 'dual')
def test_is_pg_managed_proxies(self):
with patch.object(soyaml, '_SO_YAML_PG_AVAILABLE', True):
self.assertTrue(soyaml._isPgManaged(
"/opt/so/saltstack/local/pillar/minions/h1_sensor.sls"))
self.assertFalse(soyaml._isPgManaged(
"/opt/so/saltstack/local/pillar/secrets.sls"))
def test_is_pg_managed_false_when_module_unavailable(self):
with patch.object(soyaml, '_SO_YAML_PG_AVAILABLE', False):
self.assertFalse(soyaml._isPgManaged(
"/opt/so/saltstack/local/pillar/minions/h1_sensor.sls"))
def test_load_yaml_postgres_mode_reads_pg(self):
with patch.object(soyaml, '_BACKEND_MODE', 'postgres'):
with patch.object(soyaml, '_SO_YAML_PG_AVAILABLE', True):
with patch.object(soyaml.so_yaml_postgres, 'is_pg_managed',
return_value=True):
with patch.object(soyaml.so_yaml_postgres, 'read_yaml',
return_value={"a": 1}):
result = soyaml.loadYaml(
"/opt/so/saltstack/local/pillar/soc/soc_soc.sls")
self.assertEqual(result, {"a": 1})
def test_load_yaml_postgres_mode_returns_empty_when_no_row(self):
with patch.object(soyaml, '_BACKEND_MODE', 'postgres'):
with patch.object(soyaml, '_SO_YAML_PG_AVAILABLE', True):
with patch.object(soyaml.so_yaml_postgres, 'is_pg_managed',
return_value=True):
with patch.object(soyaml.so_yaml_postgres, 'read_yaml',
return_value=None):
result = soyaml.loadYaml(
"/opt/so/saltstack/local/pillar/soc/soc_soc.sls")
self.assertEqual(result, {})
def test_load_yaml_postgres_mode_reads_disk_for_bootstrap(self):
import tempfile, os as _os
with tempfile.NamedTemporaryFile(mode='w', suffix='.yaml', delete=False) as f:
f.write("foo: bar\n")
tmp = f.name
try:
with patch.object(soyaml, '_BACKEND_MODE', 'postgres'):
with patch.object(soyaml, '_SO_YAML_PG_AVAILABLE', True):
with patch.object(soyaml.so_yaml_postgres,
'is_pg_managed', return_value=False):
result = soyaml.loadYaml(tmp)
self.assertEqual(result, {"foo": "bar"})
finally:
_os.unlink(tmp)
def test_write_yaml_postgres_mode_skips_disk(self):
import tempfile, os as _os
with tempfile.NamedTemporaryFile(mode='w', suffix='.yaml', delete=False) as f:
tmp = f.name
_os.unlink(tmp)
try:
with patch.object(soyaml, '_BACKEND_MODE', 'postgres'):
with patch.object(soyaml, '_SO_YAML_PG_AVAILABLE', True):
with patch.object(soyaml.so_yaml_postgres, 'is_pg_managed',
return_value=True):
with patch.object(soyaml.so_yaml_postgres, 'write_yaml',
return_value=(True, 'ok')) as mock_w:
soyaml.writeYaml(tmp, {"x": 1})
self.assertFalse(_os.path.exists(tmp))
mock_w.assert_called_once()
finally:
if _os.path.exists(tmp):
_os.unlink(tmp)
def test_write_yaml_postgres_mode_failure_is_fatal(self):
with patch.object(soyaml, '_BACKEND_MODE', 'postgres'):
with patch.object(soyaml, '_SO_YAML_PG_AVAILABLE', True):
with patch.object(soyaml.so_yaml_postgres, 'is_pg_managed',
return_value=True):
with patch.object(soyaml.so_yaml_postgres, 'write_yaml',
return_value=(False, 'pg write failed: connection refused')):
with patch('sys.exit', new=MagicMock()) as sysmock:
with patch('sys.stderr', new=StringIO()) as mock_err:
soyaml.writeYaml(
"/opt/so/saltstack/local/pillar/soc/soc_soc.sls",
{"x": 1})
sysmock.assert_called_with(1)
def test_write_yaml_disk_mode_skips_pg(self):
import tempfile, os as _os
with tempfile.NamedTemporaryFile(mode='w', suffix='.yaml', delete=False) as f:
tmp = f.name
try:
with patch.object(soyaml, '_BACKEND_MODE', 'disk'):
with patch.object(soyaml, '_SO_YAML_PG_AVAILABLE', True):
with patch.object(soyaml.so_yaml_postgres, 'write_yaml') as mock_w:
soyaml.writeYaml(tmp, {"x": 1})
mock_w.assert_not_called()
with open(tmp) as f:
self.assertIn('x: 1', f.read())
finally:
_os.unlink(tmp)
def test_purge_postgres_mode_calls_pg_only(self):
import tempfile, os as _os
with tempfile.NamedTemporaryFile(mode='w', suffix='.yaml', delete=False) as f:
tmp = f.name
_os.unlink(tmp)
with patch.object(soyaml, '_BACKEND_MODE', 'postgres'):
with patch.object(soyaml, '_SO_YAML_PG_AVAILABLE', True):
with patch.object(soyaml.so_yaml_postgres, 'is_pg_managed',
return_value=True):
with patch.object(soyaml.so_yaml_postgres, 'purge_yaml',
return_value=(True, 'ok')) as mock_p:
rc = soyaml.purgeFile(tmp)
self.assertEqual(rc, 0)
mock_p.assert_called_once()
def test_purge_postgres_mode_failure_returns_nonzero(self):
with patch.object(soyaml, '_BACKEND_MODE', 'postgres'):
with patch.object(soyaml, '_SO_YAML_PG_AVAILABLE', True):
with patch.object(soyaml.so_yaml_postgres, 'is_pg_managed',
return_value=True):
with patch.object(soyaml.so_yaml_postgres, 'purge_yaml',
return_value=(False, 'pg purge failed: x')):
with patch('sys.stderr', new=StringIO()):
rc = soyaml.purgeFile(
"/opt/so/saltstack/local/pillar/minions/h1_sensor.sls")
self.assertEqual(rc, 1)