neutron-server Connection pool is full, discarding connection 连接池过满

参考链接：https://zhiliao.h3c.com/Theme/details/48291

问题：

2019-11-28 16:41:33.235 6662 WARNING requests.packages.urllib3.connectionpool [-] Connection pool is full, discarding connection: 10.95.134.176
2019-11-28 16:41:36.470 6662 WARNING requests.packages.urllib3.connectionpool [-] Connection pool is full, discarding connection: 10.95.134.176
2019-11-28 16:41:46.237 6661 WARNING requests.packages.urllib3.connectionpool [-] Connection pool is full, discarding connection: 10.95.134.176
2019-11-28 16:41:48.002 6661 WARNING requests.packages.urllib3.connectionpool [-] Connection pool is full, discarding connection: 10.95.134.176
2019-11-28 16:41:48.334 6661 WARNING requests.packages.urllib3.connectionpool [-] Connection pool is full, discarding connection: 10.95.134.176
2019-11-28 16:41:50.551 6662 WARNING requests.packages.urllib3.connectionpool [-] Connection pool is full, discarding connection: 10.95.134.176
2019-11-28 16:41:57.655 6664 WARNING requests.packages.urllib3.connectionpool [-] Connection pool is full, discarding connection: 10.95.134.176
2019-11-28 16:41:59.032 6662 WARNING requests.packages.urllib3.connectionpool [-] Connection pool is full, discarding connection: 10.95.134.176
2019-11-28 16:41:59.420 6662 WARNING requests.packages.urllib3.connectionpool [-] Connection pool is full, discarding connection: 10.95.134.176
2019-11-28 16:42:02.280 6662 WARNING requests.packages.urllib3.connectionpool [-] Connection pool is full, discarding connection: 10.95.134.176
2019-11-28 16:42:03.644 6664 WARNING requests.packages.urllib3.connectionpool [-] Connection pool is full, discarding connection: 10.95.134.176

解决方法：

经确认compute容器下默认的连接池参数“DEFAULT_POOLSIZE”是10，可以修改为1000。该参数需要固化。

配置文件的路径为：/usr/lib/python2.7/site-packages/requests/adapters.py  

from .exceptions import (ConnectionError, ConnectTimeout, ReadTimeout, SSLError,
                         ProxyError, RetryError)
from .auth import _basic_auth_str

DEFAULT_POOLBLOCK = False
DEFAULT_POOLSIZE = 1000
DEFAULT_RETRIES = 0


class BaseAdapter(object):