OpenShift Python mongoDB环境变量未设置/无法连接

Question

这是在我的应用程序文件头中：

import os
import sys
from cgi import parse_qs, escape
import pymongo
from pymongo import MongoClient

我已经安装了mongoDB 2.4齿轮，并且正在尝试通过

client = MongoClient('mongodb:$OPENSHIFT_MONGODB_DB_HOST:$OPENSHIFT_MONGODB_DB_PORT/')

我得到了错误：

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/var/lib/openshift/531b77fd500446980900010d/python/virtenv/lib/python2.7/site-packages/pymongo/mongo_client.py", line 239, in __init__
    res = uri_parser.parse_uri(entity, port)
  File "/var/lib/openshift/531b77fd500446980900010d/python/virtenv/lib/python2.7/site-packages/pymongo/uri_parser.py", line 269, in parse_uri
    nodes = split_hosts(hosts, default_port=default_port)
  File "/var/lib/openshift/531b77fd500446980900010d/python/virtenv/lib/python2.7/site-packages/pymongo/uri_parser.py", line 209, in split_hosts
    nodes.append(parse_host(entity, port))
  File "/var/lib/openshift/531b77fd500446980900010d/python/virtenv/lib/python2.7/site-packages/pymongo/uri_parser.py", line 137, in parse_host
    raise ConfigurationError("Port number must be an integer.")
pymongo.errors.ConfigurationError: Port number must be an integer.

好像未设置OPENSHIFT_MONGODB_DB_PORT

print  OPENSHIFT_MONGODB_DB_PORT --> NameError: name 'OPENSHIFT_MONGODB_DB_PORT' is not defined

与OPENSHIFT_MONGODB_DB_HOST相同

建立连接我需要做什么？

更新：

我可以通过硬编码来自rockmongo的信息直接通过客户端连接

client = MongoClient('mongodb://admin:password@[ip addr]:[port]/') 

但是当我这样做

client = MongoClient('mongodb:admin:password@%s:%s/' %  os.environ['OPENSHIFT_MONGODB_DB_HOST'], os.environ['OPENSHIFT_MONGODB_DB_PORT'])) 

我懂了

[error] (<type 'exceptions.KeyError'>, KeyError('OPENSHIFT_MONGODB_DB_HOST',), <traceback object at 0x7f7bc8367248>)

Answer 1

OpenShift连接变量定义为环境变量，不能作为常规Python变量进行访问。 因此，您提供的打印语句不起作用，以下应；

import os
print os.environ['OPENSHIFT_MONGODB_DB_PORT']

您应该将代码更改为；

client = MongoClient('mongodb:%s:%s/' % (os.environ['OPENSHIFT_MONGODB_DB_HOST'], os.environ['OPENSHIFT_MONGODB_DB_PORT))

您可以在此处参考示例。