pip报“Cannot connect to proxy”与“Failed to establish a new connection: [Errno 113] No route to host"案例

在一台新的Linux(CentOS 7.7)服务器上使用pip安装python包时遇到下面错误和告警,如下所示:

 

# pip install pymssql
WARNING: Retrying (Retry(total=4, connect=None, read=None, redirect=None, status=None)) after connection broken by 'ProxyError('Cannot connect to proxy.', NewConnectionError(': Failed to establish a new connection: [Errno 113] No route to host',))': /simple/pymssql/
WARNING: Retrying (Retry(total=3, connect=None, read=None, redirect=None, status=None)) after connection broken by 'ProxyError('Cannot connect to proxy.', NewConnectionError(': Failed to establish a new connection: [Errno 113] No route to host',))': /simple/pymssql/
WARNING: Retrying (Retry(total=2, connect=None, read=None, redirect=None, status=None)) after connection broken by 'ProxyError('Cannot connect to proxy.', NewConnectionError(': Failed to establish a new connection: [Errno 113] No route to host',))': /simple/pymssql/
WARNING: Retrying (Retry(total=1, connect=None, read=None, redirect=None, status=None)) after connection broken by 'ProxyError('Cannot connect to proxy.', NewConnectionError(': Failed to establish a new connection: [Errno 113] No route to host',))': /simple/pymssql/
WARNING: Retrying (Retry(total=0, connect=None, read=None, redirect=None, status=None)) after connection broken by 'ProxyError('Cannot connect to proxy.', NewConnectionError(': Failed to establish a new connection: [Errno 113] No route to host',))': /simple/pymssql/
ERROR: Could not find a version that satisfies the requirement pymssql (from versions: none)
ERROR: No matching distribution found for pymssql

 

最后检查发现是因为代理弄错了。注意下面敏感信息做了混淆xxx.xxx.xxx.xxx代替了具体IP

 

export http_proxy='http://xxx.xxx.xxx.xxx:3128'

export https_proxy='http://xxx.xxx.xxx.xxx:3128'

 

修改/etc/profile,更改设置,如下所示

 

export http_proxy='http://xxx.xxx.xxx.xxx:3128'

export https_proxy='https://xxx.xxx.xxx.xxx:3128'

 

执行source /etc/profile使之生效,问题解决。

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