khodowany
184 lines
10 KiB
Python
184 lines
10 KiB
Python
import hashlib
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import io
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import json
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import os
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import pathlib
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import shutil
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import subprocess
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import tarfile
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import tempfile
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import unittest
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ROOT = pathlib.Path(__file__).resolve().parents[1]
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MOCK = '''#!/usr/bin/env python3
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import json, os, sys
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from pathlib import Path
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root = Path(os.environ['INSTALL_FIXTURE'])
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command, args = Path(sys.argv[0]).name, sys.argv[1:]
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with (root / 'commands').open('a') as output:
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output.write(json.dumps([command, *args]) + '\\n')
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if command == 'id':
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print('0')
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elif command == 'dpkg-query':
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print('install ok installed')
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elif command == 'docker':
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if args[:2] == ['image', 'inspect']:
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if os.environ.get('FIRST_INSTALL') and not (root / 'loaded').exists():
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sys.exit(1)
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print(os.environ['FIXTURE_IMAGE'] if (root / 'loaded').exists() else 'sha256:old')
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elif args[:2] == ['image', 'ls']:
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if not os.environ.get('FIRST_INSTALL'):
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print('sha256:older')
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elif args[:2] == ['container', 'inspect'] and os.environ.get('FIRST_INSTALL'):
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sys.exit(1)
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elif args[0] == 'load':
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(root / 'loaded').touch()
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elif args[0] == 'run' and os.environ.get('FAIL_PREFLIGHT'):
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sys.exit(1)
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elif args[0] == 'exec' and os.environ.get('FAIL_HEALTH'):
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sys.exit(1)
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elif args[0] == 'ps' and os.environ.get('SHARED_IMAGE') in args:
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print('another-container')
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elif command == 'systemctl' and args[0] == 'cat' and os.environ.get('FIRST_INSTALL'):
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sys.exit(1)
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elif command == 'nmcli' and args[:4] == ['-t', '-f', 'NAME', 'connection']:
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print('product-vamp-control')
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print('unrelated-network')
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'''
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class InstallZeroTests(unittest.TestCase):
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def setUp(self):
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self.temporary = tempfile.TemporaryDirectory()
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self.addCleanup(self.temporary.cleanup)
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self.root = pathlib.Path(self.temporary.name)
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self.bundle = self.root / 'bundle'
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self.zero = self.bundle / 'zero'
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self.zero.mkdir(parents=True)
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(self.zero / 'config').mkdir()
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(self.zero / 'systemd').mkdir()
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self.image_tag = 'product-vamp-zero:dev'
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self.write_archive(self.image_tag)
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shutil.copyfile(ROOT / 'package/config/vamp.example.json', self.zero / 'config/vamp.example.json')
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for name in ('start-zero.sh', 'start-ap.sh'):
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shutil.copyfile(ROOT / 'package/zero' / name, self.zero / name)
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for name in ('product-vamp-zero.service', 'product-vamp-ap.service'):
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shutil.copyfile(ROOT / 'package/zero' / name, self.zero / 'systemd' / name)
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script = (ROOT / 'package/zero/install-zero.sh').read_text()
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for prefix in ('/tmp/', '/etc/', '/var/', '/run/', '/usr/local/', '/usr/share/'):
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script = script.replace(prefix, str(self.root) + prefix)
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(self.zero / 'install-zero.sh').write_text(script)
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for path in ('etc/systemd/system', 'usr/local/bin', 'tmp', 'bin'):
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(self.root / path).mkdir(parents=True, exist_ok=True)
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for command in ('id', 'dpkg-query', 'apt-get', 'systemctl', 'docker', 'nmcli', 'sleep', 'chvt', 'setterm'):
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path = self.root / 'bin' / command
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path.write_text(MOCK)
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path.chmod(0o755)
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self.environment = {**os.environ, 'INSTALL_FIXTURE': str(self.root), 'FIXTURE_IMAGE': self.image_id, 'PATH': str(self.root / 'bin') + os.pathsep + os.environ['PATH']}
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def write_archive(self, tag):
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configuration = b'{"architecture":"arm64","os":"linux"}'
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self.image_id = 'sha256:' + hashlib.sha256(configuration).hexdigest()
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manifest = json.dumps([{'Config': 'image.json', 'RepoTags': [tag]}]).encode()
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with tarfile.open(self.zero / 'product-vamp-zero-linux-arm64.docker.tar', 'w') as archive:
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for name, data in (('manifest.json', manifest), ('image.json', configuration)):
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info = tarfile.TarInfo(name)
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info.size = len(data)
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archive.addfile(info, io.BytesIO(data))
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(self.bundle / 'manifest.json').write_text(json.dumps({'zero': {'image_tag': tag}}))
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def install(self, **environment):
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return subprocess.run(['bash', str(self.zero / 'install-zero.sh')], env={**self.environment, **environment}, text=True, capture_output=True)
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def commands(self):
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return [json.loads(line) for line in (self.root / 'commands').read_text().splitlines()]
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def stale_state(self):
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for name in ('etc/product-vamp/vamp.json', 'etc/product-vamp/obsolete', 'var/lib/product-vamp/vamp.db',
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'var/lib/product-vamp/vamp.db-wal', 'var/lib/product-vamp/vamp.db-shm', 'run/product-vamp/heartbeat.json',
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'usr/share/product-vamp/songs/removed.json', 'usr/share/product-vamp/practice/0001/electric.json', 'etc/systemd/system/product-vamp-zero.service.d/override.conf',
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'run/systemd/system/product-vamp-ap.service.d/override.conf'):
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path = self.root / name
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path.parent.mkdir(parents=True, exist_ok=True)
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path.write_text('previous installation')
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unrelated = self.root / 'var/lib/unrelated/keep'
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unrelated.parent.mkdir(parents=True)
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unrelated.write_text('keep')
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def test_first_install_and_reinstall_reset_only_owned_state(self):
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first = self.install(FIRST_INSTALL='1')
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self.assertEqual(first.returncode, 0, first.stderr)
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self.stale_state()
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second = self.install()
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self.assertEqual(second.returncode, 0, second.stderr)
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self.assertEqual((self.root / 'etc/product-vamp/vamp.json').read_bytes(), (self.zero / 'config/vamp.example.json').read_bytes())
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self.assertEqual((self.root / 'etc/product-vamp/image-id').read_text().strip(), self.image_id)
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self.assertFalse((self.root / 'etc/product-vamp/obsolete').exists())
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self.assertFalse((self.root / 'var/lib/product-vamp').exists())
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self.assertFalse((self.root / 'usr/share/product-vamp').exists())
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self.assertFalse((self.root / 'etc/systemd/system/product-vamp-zero.service.d').exists())
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self.assertFalse((self.root / 'run/systemd/system/product-vamp-ap.service.d').exists())
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self.assertEqual(list((self.root / 'run/product-vamp').iterdir()), [])
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self.assertEqual((self.root / 'var/lib/unrelated/keep').read_text(), 'keep')
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self.assertEqual(list((self.root / 'tmp').iterdir()), [])
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commands = self.commands()
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self.assertIn(['nmcli', 'connection', 'delete', 'product-vamp-control'], commands)
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self.assertNotIn(['nmcli', 'connection', 'delete', 'unrelated-network'], commands)
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self.assertFalse(any('prune' in command for command in commands))
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probe = next(index for index, command in enumerate(commands) if command[:2] == ['docker', 'run'])
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stop = commands.index(['systemctl', 'stop', 'product-vamp-zero.service'])
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self.assertLess(probe, stop)
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def test_failed_preflight_keeps_old_state_and_restores_image_tag(self):
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self.stale_state()
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result = self.install(FAIL_PREFLIGHT='1')
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self.assertNotEqual(result.returncode, 0)
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self.assertEqual((self.root / 'var/lib/product-vamp/vamp.db').read_text(), 'previous installation')
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self.assertEqual((self.root / 'etc/product-vamp/vamp.json').read_text(), 'previous installation')
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self.assertNotIn(['systemctl', 'stop', 'product-vamp-zero.service'], self.commands())
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self.assertIn(['docker', 'tag', 'sha256:old', 'product-vamp-zero:dev'], self.commands())
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def test_failed_health_leaves_services_stopped_without_success(self):
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result = self.install(FAIL_HEALTH='1')
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self.assertNotEqual(result.returncode, 0)
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self.assertNotIn('Zero installed.', result.stdout)
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self.assertIn(['systemctl', 'stop', 'product-vamp-zero.service', 'product-vamp-ap.service'], self.commands())
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self.assertIn(['docker', 'rm', '-f', 'product-vamp-zero'], self.commands())
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def test_symlink_target_aborts_without_deleting_external_data(self):
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external = self.root / 'external'
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external.mkdir()
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(external / 'keep').write_text('keep')
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(self.root / 'etc/product-vamp').symlink_to(external, target_is_directory=True)
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result = self.install()
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self.assertNotEqual(result.returncode, 0)
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self.assertIn('unsafe installation target', result.stderr)
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self.assertEqual((external / 'keep').read_text(), 'keep')
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self.assertNotIn(['systemctl', 'stop', 'product-vamp-zero.service'], self.commands())
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def test_image_in_use_by_another_container_is_not_removed(self):
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result = self.install(SHARED_IMAGE='ancestor=sha256:old')
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self.assertEqual(result.returncode, 0, result.stderr)
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self.assertNotIn(['docker', 'image', 'rm', 'sha256:old'], self.commands())
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self.assertIn(['docker', 'image', 'rm', 'sha256:older'], self.commands())
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def test_custom_bundle_tag_selects_and_pins_the_incoming_image(self):
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self.write_archive('product-vamp-zero:release-test')
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result = self.install()
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self.assertEqual(result.returncode, 0, result.stderr)
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self.assertIn(['docker', 'image', 'inspect', '--format', '{{.Id}}', 'product-vamp-zero:release-test'], self.commands())
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self.assertEqual((self.root / 'etc/product-vamp/image-id').read_text().strip(), self.image_id)
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def test_wrong_archive_never_resets_the_old_installation(self):
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self.stale_state()
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(self.bundle / 'manifest.json').write_text(json.dumps({'zero': {'image_tag': 'product-vamp-zero:missing'}}))
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result = self.install()
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self.assertNotEqual(result.returncode, 0)
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self.assertEqual((self.root / 'var/lib/product-vamp/vamp.db').read_text(), 'previous installation')
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self.assertFalse(any(command[:2] == ['docker', 'load'] for command in self.commands()))
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def test_loaded_image_must_match_archive_digest(self):
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self.stale_state()
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result = self.install(FIXTURE_IMAGE='sha256:unexpected')
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self.assertNotEqual(result.returncode, 0)
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self.assertIn('does not match', result.stderr)
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self.assertEqual((self.root / 'var/lib/product-vamp/vamp.db').read_text(), 'previous installation')
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self.assertIn(['docker', 'tag', 'sha256:old', 'product-vamp-zero:dev'], self.commands())
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def test_startup_uses_pinned_image_without_mounting_legacy_database(self):
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result = self.install()
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self.assertEqual(result.returncode, 0, result.stderr)
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environment = {**self.environment, 'PRODUCT_VAMP_CONFIG_DIR': str(self.root / 'etc/product-vamp'),
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'PRODUCT_VAMP_RUN_DIR': str(self.root / 'run/product-vamp'), 'PRODUCT_VAMP_DISPLAY_TTY': str(self.root / 'tty')}
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started = subprocess.run(['bash', str(ROOT / 'package/zero/start-zero.sh')], env=environment, text=True, capture_output=True)
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self.assertEqual(started.returncode, 0, started.stderr)
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command = [item for item in self.commands() if item[:2] == ['docker', 'run']][-1]
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self.assertIn(self.image_id, command)
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self.assertFalse(any('/var/lib/product-vamp' in argument for argument in command))
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