| 75 | |
| 76 | |
| 77 | class Cluster: |
| 78 | def __init__(self, data_dir, *, pg_config_path=None): |
| 79 | self._data_dir = data_dir |
| 80 | self._pg_config_path = pg_config_path |
| 81 | self._pg_bin_dir = ( |
| 82 | os.environ.get('PGINSTALLATION') |
| 83 | or os.environ.get('PGBIN') |
| 84 | ) |
| 85 | self._pg_ctl = None |
| 86 | self._daemon_pid = None |
| 87 | self._daemon_process = None |
| 88 | self._connection_addr = None |
| 89 | self._connection_spec_override = None |
| 90 | |
| 91 | def get_pg_version(self): |
| 92 | return self._pg_version |
| 93 | |
| 94 | def is_managed(self): |
| 95 | return True |
| 96 | |
| 97 | def get_data_dir(self): |
| 98 | return self._data_dir |
| 99 | |
| 100 | def get_status(self): |
| 101 | if self._pg_ctl is None: |
| 102 | self._init_env() |
| 103 | |
| 104 | process = subprocess.run( |
| 105 | [self._pg_ctl, 'status', '-D', self._data_dir], |
| 106 | stdout=subprocess.PIPE, stderr=subprocess.PIPE) |
| 107 | stdout, stderr = process.stdout, process.stderr |
| 108 | |
| 109 | if (process.returncode == 4 or not os.path.exists(self._data_dir) or |
| 110 | not os.listdir(self._data_dir)): |
| 111 | return 'not-initialized' |
| 112 | elif process.returncode == 3: |
| 113 | return 'stopped' |
| 114 | elif process.returncode == 0: |
| 115 | r = re.match(r'.*PID\s?:\s+(\d+).*', stdout.decode()) |
| 116 | if not r: |
| 117 | raise ClusterError( |
| 118 | 'could not parse pg_ctl status output: {}'.format( |
| 119 | stdout.decode())) |
| 120 | self._daemon_pid = int(r.group(1)) |
| 121 | return self._test_connection(timeout=0) |
| 122 | else: |
| 123 | raise ClusterError( |
| 124 | 'pg_ctl status exited with status {:d}: {}'.format( |
| 125 | process.returncode, stderr)) |
| 126 | |
| 127 | async def connect(self, loop=None, **kwargs): |
| 128 | conn_info = self.get_connection_spec() |
| 129 | conn_info.update(kwargs) |
| 130 | return await asyncpg.connect(loop=loop, **conn_info) |
| 131 | |
| 132 | def init(self, **settings): |
| 133 | """Initialize cluster.""" |
| 134 | if self.get_status() != 'not-initialized': |
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