无法从另一个容器连接到mongodb泊坞窗容器

我有以下简化的devise：一个mongodb容器和一个“python-client”docker集装箱，它与前者相连。 这是我简化docker-compose.yml文件：

 mongodb: build: "mongodb" dockerfile: "Dockerfile" hostname: "mongodb.local" ports: - "27017:27017" client: build: "client" dockerfile: "Dockerfile" hostname: "client.local" links: - "mongodb:mongodb" environment: - "MONGODB_URL=mongodb://admin:admin@mongodb:27017/admin" - "MONGODB_DB=historictraffic" 

我能够使用mongodb://admin:admin@localhost:27017/admin连接string（请注意localhost ）使用来自主机的pymongobuild立成功的连接：

 $ ipython from pymongo import MongoClient mongo = MongoClient('mongodb://admin:admin@localhost:27017/admin') db = mongo.test col = db.test col.insert_one({'x': 1}) # This works 

但是我无法从客户端容器连接。 显然这个链接是正确的：

  / # cat /etc/hosts 172.17.0.27 client.local client 127.0.0.1 localhost ::1 localhost ip6-localhost ip6-loopback fe00::0 ip6-localnet ff00::0 ip6-mcastprefix ff02::1 ip6-allnodes ff02::2 ip6-allrouters 172.17.0.26 historictraffic_mongodb_1 mongodb 172.17.0.26 mongodb mongodb historictraffic_mongodb_1 172.17.0.26 mongodb_1 mongodb historictraffic_mongodb_1 

但是当我做同样的testing时，它会失败：

 / # ipython from pymongo import MongoClient mongo = MongoClient('mongodb://admin:admin@mongodb:27017/admin') db = mongo.test col = db.test col.insert_one({'x': 2}) --------------------------------------------------------------------------- ServerSelectionTimeoutError Traceback (most recent call last) <ipython-input-5-c5d62e5590d5> in <module>() ----> 1 col.insert_one({'x': 2}) /usr/lib/python2.7/site-packages/pymongo/collection.pyc in insert_one(self, document) 464 if "_id" not in document: 465 document["_id"] = ObjectId() --> 466 with self._socket_for_writes() as sock_info: 467 return InsertOneResult(self._insert(sock_info, document), 468 self.write_concern.acknowledged) /usr/lib/python2.7/contextlib.pyc in __enter__(self) 15 def __enter__(self): 16 try: ---> 17 return self.gen.next() 18 except StopIteration: 19 raise RuntimeError("generator didn't yield") /usr/lib/python2.7/site-packages/pymongo/mongo_client.pyc in _get_socket(self, selector) 661 @contextlib.contextmanager 662 def _get_socket(self, selector): --> 663 server = self._get_topology().select_server(selector) 664 try: 665 with server.get_socket(self.__all_credentials) as sock_info: /usr/lib/python2.7/site-packages/pymongo/topology.pyc in select_server(self, selector, server_selection_timeout, address) 119 return random.choice(self.select_servers(selector, 120 server_selection_timeout, --> 121 address)) 122 123 def select_server_by_address(self, address, /usr/lib/python2.7/site-packages/pymongo/topology.pyc in select_servers(self, selector, server_selection_timeout, address) 95 if server_timeout == 0 or now > end_time: 96 raise ServerSelectionTimeoutError( ---> 97 self._error_message(selector)) 98 99 self._ensure_opened() ServerSelectionTimeoutError: mongodb:27017: [Errno 113] Host is unreachable 

有谁知道如何解决它？ 谢谢。

Answer 1

这个失败可能是因为mongo还没有启动。 您可以在重试之间以短暂的延迟重试连接，并且在尝试一次或两次之后就可以工作。