addons.sh安装Let Encrypt client报错

执行脚本，安装到最后提示安装不成功。
Installed /usr/local/python/lib/python2.7/site-packages/pip-9.0.1-py2.7.egg
Processing dependencies for pip==9.0.1
Finished processing dependencies for pip==9.0.1
~/oneinstack/src ~/oneinstack
~/oneinstack
Collecting requests
Retrying (Retry(total=4, connect=None, read=None, redirect=None)) after connection broken by \\\\’NewConnectionError(\\\\’<pip._vendor.requests.packages.urllib3.connection.VerifiedHTTPSConnection object at 0x7f0fa1363c90>: Failed to establish a new connection: [Errno 101] Network is unreachable\\\\’,)\\\\’: /simple/requests/
Retrying (Retry(total=3, connect=None, read=None, redirect=None)) after connection broken by \\\\’NewConnectionError(\\\\’<pip._vendor.requests.packages.urllib3.connection.VerifiedHTTPSConnection object at 0x7f0fa1363550>: Failed to establish a new connection: [Errno 101] Network is unreachable\\\\’,)\\\\’: /simple/requests/
Retrying (Retry(total=2, connect=None, read=None, redirect=None)) after connection broken by \\\\’NewConnectionError(\\\\’<pip._vendor.requests.packages.urllib3.connection.VerifiedHTTPSConnection object at 0x7f0fa1363c50>: Failed to establish a new connection: [Errno 101] Network is unreachable\\\\’,)\\\\’: /simple/requests/
Retrying (Retry(total=1, connect=None, read=None, redirect=None)) after connection broken by \\\\’NewConnectionError(\\\\’<pip._vendor.requests.packages.urllib3.connection.VerifiedHTTPSConnection object at 0x7f0fa1363050>: Failed to establish a new connection: [Errno 101] Network is unreachable\\\\’,)\\\\’: /simple/requests/
Retrying (Retry(total=0, connect=None, read=None, redirect=None)) after connection broken by \\\\’NewConnectionError(\\\\’<pip._vendor.requests.packages.urllib3.connection.VerifiedHTTPSConnection object at 0x7f0fa1363090>: Failed to establish a new connection: [Errno 101] Network is unreachable\\\\’,)\\\\’: /simple/requests/
Could not find a version that satisfies the requirement requests (from versions: )
No matching distribution found for requests
Collecting certbot
Retrying (Retry(total=4, connect=None, read=None, redirect=None)) after connection broken by \\\\’NewConnectionError(\\\\’<pip._vendor.requests.packages.urllib3.connection.VerifiedHTTPSConnection object at 0x7fdeb278dc90>: Failed to establish a new connection: [Errno 101] Network is unreachable\\\\’,)\\\\’: /simple/certbot/
Retrying (Retry(total=3, connect=None, read=None, redirect=None)) after connection broken by \\\\’NewConnectionError(\\\\’<pip._vendor.requests.packages.urllib3.connection.VerifiedHTTPSConnection object at 0x7fdeb278d550>: Failed to establish a new connection: [Errno 101] Network is unreachable\\\\’,)\\\\’: /simple/certbot/
Retrying (Retry(total=2, connect=None, read=None, redirect=None)) after connection broken by \\\\’NewConnectionError(\\\\’<pip._vendor.requests.packages.urllib3.connection.VerifiedHTTPSConnection object at 0x7fdeb278dc50>: Failed to establish a new connection: [Errno 101] Network is unreachable\\\\’,)\\\\’: /simple/certbot/
Retrying (Retry(total=1, connect=None, read=None, redirect=None)) after connection broken by \\\\’NewConnectionError(\\\\’<pip._vendor.requests.packages.urllib3.connection.VerifiedHTTPSConnection object at 0x7fdeb278d050>: Failed to establish a new connection: [Errno 101] Network is unreachable\\\\’,)\\\\’: /simple/certbot/
Retrying (Retry(total=0, connect=None, read=None, redirect=None)) after connection broken by \\\\’NewConnectionError(\\\\’<pip._vendor.requests.packages.urllib3.connection.VerifiedHTTPSConnection object at 0x7fdeb278d090>: Failed to establish a new connection: [Errno 101] Network is unreachable\\\\’,)\\\\’: /simple/certbot/
Could not find a version that satisfies the requirement certbot (from versions: )
No matching distribution found for certbot
Let\\\\’s Encrypt client install failed, Please try again!