Source code for airflow.models.connection

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import json
from builtins import bytes
from urllib.parse import urlparse, unquote, parse_qsl

from sqlalchemy import Column, Integer, String, Boolean
from sqlalchemy.ext.declarative import declared_attr
from sqlalchemy.orm import synonym

from airflow import LoggingMixin
from airflow.exceptions import AirflowException
from airflow.models.base import Base, ID_LEN
from airflow.models.crypto import get_fernet


# Python automatically converts all letters to lowercase in hostname
# See: https://issues.apache.org/jira/browse/AIRFLOW-3615
[docs]def parse_netloc_to_hostname(uri_parts): hostname = unquote(uri_parts.hostname or '') if '/' in hostname: hostname = uri_parts.netloc if "@" in hostname: hostname = hostname.rsplit("@", 1)[1] if ":" in hostname: hostname = hostname.split(":", 1)[0] hostname = unquote(hostname) return hostname
[docs]class Connection(Base, LoggingMixin): """ Placeholder to store information about different database instances connection information. The idea here is that scripts use references to database instances (conn_id) instead of hard coding hostname, logins and passwords when using operators or hooks. """
[docs] __tablename__ = "connection"
[docs] id = Column(Integer(), primary_key=True)
[docs] conn_id = Column(String(ID_LEN))
[docs] conn_type = Column(String(500))
[docs] host = Column(String(500))
[docs] schema = Column(String(500))
[docs] login = Column(String(500))
[docs] _password = Column('password', String(5000))
[docs] port = Column(Integer())
[docs] is_encrypted = Column(Boolean, unique=False, default=False)
[docs] is_extra_encrypted = Column(Boolean, unique=False, default=False)
[docs] _extra = Column('extra', String(5000))
[docs] _types = [ ('docker', 'Docker Registry',), ('fs', 'File (path)'), ('ftp', 'FTP',), ('google_cloud_platform', 'Google Cloud Platform'), ('hdfs', 'HDFS',), ('http', 'HTTP',), ('pig_cli', 'Pig Client Wrapper',), ('hive_cli', 'Hive Client Wrapper',), ('hive_metastore', 'Hive Metastore Thrift',), ('hiveserver2', 'Hive Server 2 Thrift',), ('jdbc', 'Jdbc Connection',), ('jenkins', 'Jenkins'), ('mysql', 'MySQL',), ('postgres', 'Postgres',), ('oracle', 'Oracle',), ('vertica', 'Vertica',), ('presto', 'Presto',), ('s3', 'S3',), ('samba', 'Samba',), ('sqlite', 'Sqlite',), ('ssh', 'SSH',), ('cloudant', 'IBM Cloudant',), ('mssql', 'Microsoft SQL Server'), ('mesos_framework-id', 'Mesos Framework ID'), ('jira', 'JIRA',), ('redis', 'Redis',), ('wasb', 'Azure Blob Storage'), ('databricks', 'Databricks',), ('aws', 'Amazon Web Services',), ('emr', 'Elastic MapReduce',), ('snowflake', 'Snowflake',), ('segment', 'Segment',), ('azure_data_lake', 'Azure Data Lake'), ('azure_container_instances', 'Azure Container Instances'), ('azure_cosmos', 'Azure CosmosDB'), ('cassandra', 'Cassandra',), ('qubole', 'Qubole'), ('mongo', 'MongoDB'), ('gcpcloudsql', 'Google Cloud SQL'), ('grpc', 'GRPC Connection'),
] def __init__( self, conn_id=None, conn_type=None, host=None, login=None, password=None, schema=None, port=None, extra=None, uri=None): self.conn_id = conn_id if uri: self.parse_from_uri(uri) else: self.conn_type = conn_type self.host = host self.login = login self.password = password self.schema = schema self.port = port self.extra = extra
[docs] def parse_from_uri(self, uri): uri_parts = urlparse(uri) conn_type = uri_parts.scheme if conn_type == 'postgresql': conn_type = 'postgres' elif '-' in conn_type: conn_type = conn_type.replace('-', '_') self.conn_type = conn_type self.host = parse_netloc_to_hostname(uri_parts) quoted_schema = uri_parts.path[1:] self.schema = unquote(quoted_schema) if quoted_schema else quoted_schema self.login = unquote(uri_parts.username) \ if uri_parts.username else uri_parts.username self.password = unquote(uri_parts.password) \ if uri_parts.password else uri_parts.password self.port = uri_parts.port if uri_parts.query: self.extra = json.dumps(dict(parse_qsl(uri_parts.query, keep_blank_values=True)))
[docs] def get_password(self): if self._password and self.is_encrypted: fernet = get_fernet() if not fernet.is_encrypted: raise AirflowException( "Can't decrypt encrypted password for login={}, \ FERNET_KEY configuration is missing".format(self.login)) return fernet.decrypt(bytes(self._password, 'utf-8')).decode() else: return self._password
[docs] def set_password(self, value): if value: fernet = get_fernet() self._password = fernet.encrypt(bytes(value, 'utf-8')).decode() self.is_encrypted = fernet.is_encrypted
@declared_attr
[docs] def password(cls): return synonym('_password', descriptor=property(cls.get_password, cls.set_password))
[docs] def get_extra(self): if self._extra and self.is_extra_encrypted: fernet = get_fernet() if not fernet.is_encrypted: raise AirflowException( "Can't decrypt `extra` params for login={},\ FERNET_KEY configuration is missing".format(self.login)) return fernet.decrypt(bytes(self._extra, 'utf-8')).decode() else: return self._extra
[docs] def set_extra(self, value): if value: fernet = get_fernet() self._extra = fernet.encrypt(bytes(value, 'utf-8')).decode() self.is_extra_encrypted = fernet.is_encrypted else: self._extra = value self.is_extra_encrypted = False
@declared_attr
[docs] def extra(cls): return synonym('_extra', descriptor=property(cls.get_extra, cls.set_extra))
[docs] def rotate_fernet_key(self): fernet = get_fernet() if self._password and self.is_encrypted: self._password = fernet.rotate(self._password.encode('utf-8')).decode() if self._extra and self.is_extra_encrypted: self._extra = fernet.rotate(self._extra.encode('utf-8')).decode()
[docs] def get_hook(self): if self.conn_type == 'mysql': from airflow.hooks.mysql_hook import MySqlHook return MySqlHook(mysql_conn_id=self.conn_id) elif self.conn_type == 'google_cloud_platform': from airflow.contrib.hooks.bigquery_hook import BigQueryHook return BigQueryHook(bigquery_conn_id=self.conn_id) elif self.conn_type == 'postgres': from airflow.hooks.postgres_hook import PostgresHook return PostgresHook(postgres_conn_id=self.conn_id) elif self.conn_type == 'pig_cli': from airflow.hooks.pig_hook import PigCliHook return PigCliHook(pig_cli_conn_id=self.conn_id) elif self.conn_type == 'hive_cli': from airflow.hooks.hive_hooks import HiveCliHook return HiveCliHook(hive_cli_conn_id=self.conn_id) elif self.conn_type == 'presto': from airflow.hooks.presto_hook import PrestoHook return PrestoHook(presto_conn_id=self.conn_id) elif self.conn_type == 'hiveserver2': from airflow.hooks.hive_hooks import HiveServer2Hook return HiveServer2Hook(hiveserver2_conn_id=self.conn_id) elif self.conn_type == 'sqlite': from airflow.hooks.sqlite_hook import SqliteHook return SqliteHook(sqlite_conn_id=self.conn_id) elif self.conn_type == 'jdbc': from airflow.hooks.jdbc_hook import JdbcHook return JdbcHook(jdbc_conn_id=self.conn_id) elif self.conn_type == 'mssql': from airflow.hooks.mssql_hook import MsSqlHook return MsSqlHook(mssql_conn_id=self.conn_id) elif self.conn_type == 'oracle': from airflow.hooks.oracle_hook import OracleHook return OracleHook(oracle_conn_id=self.conn_id) elif self.conn_type == 'vertica': from airflow.contrib.hooks.vertica_hook import VerticaHook return VerticaHook(vertica_conn_id=self.conn_id) elif self.conn_type == 'cloudant': from airflow.contrib.hooks.cloudant_hook import CloudantHook return CloudantHook(cloudant_conn_id=self.conn_id) elif self.conn_type == 'jira': from airflow.contrib.hooks.jira_hook import JiraHook return JiraHook(jira_conn_id=self.conn_id) elif self.conn_type == 'redis': from airflow.contrib.hooks.redis_hook import RedisHook return RedisHook(redis_conn_id=self.conn_id) elif self.conn_type == 'wasb': from airflow.contrib.hooks.wasb_hook import WasbHook return WasbHook(wasb_conn_id=self.conn_id) elif self.conn_type == 'docker': from airflow.hooks.docker_hook import DockerHook return DockerHook(docker_conn_id=self.conn_id) elif self.conn_type == 'azure_data_lake': from airflow.contrib.hooks.azure_data_lake_hook import AzureDataLakeHook return AzureDataLakeHook(azure_data_lake_conn_id=self.conn_id) elif self.conn_type == 'azure_cosmos': from airflow.contrib.hooks.azure_cosmos_hook import AzureCosmosDBHook return AzureCosmosDBHook(azure_cosmos_conn_id=self.conn_id) elif self.conn_type == 'cassandra': from airflow.contrib.hooks.cassandra_hook import CassandraHook return CassandraHook(cassandra_conn_id=self.conn_id) elif self.conn_type == 'mongo': from airflow.contrib.hooks.mongo_hook import MongoHook return MongoHook(conn_id=self.conn_id) elif self.conn_type == 'gcpcloudsql': from airflow.contrib.hooks.gcp_sql_hook import CloudSqlDatabaseHook return CloudSqlDatabaseHook(gcp_cloudsql_conn_id=self.conn_id) elif self.conn_type == 'grpc': from airflow.contrib.hooks.grpc_hook import GrpcHook return GrpcHook(grpc_conn_id=self.conn_id) raise AirflowException("Unknown hook type {}".format(self.conn_type))
[docs] def __repr__(self): return self.conn_id
[docs] def debug_info(self): return ("id: {}. Host: {}, Port: {}, Schema: {}, " "Login: {}, Password: {}, extra: {}". format(self.conn_id, self.host, self.port, self.schema, self.login, "XXXXXXXX" if self.password else None, self.extra_dejson))
@property
[docs] def extra_dejson(self): """Returns the extra property by deserializing json.""" obj = {} if self.extra: try: obj = json.loads(self.extra) except Exception as e: self.log.exception(e) self.log.error("Failed parsing the json for conn_id %s", self.conn_id) return obj