使用pip安装python软件包时出错（TLSV1_ALERT_PROTOCOL_VERSION）

Question

I'm on Suse Linux Enterprise 11 SP4 and I'm trying to install a python package using pip but it's failing with the following error:

Env:

$ python --version
Python 3.6.6

$ pip --version
pip 10.0.1 from /home/<<user>>/.pyenv/versions/3.6.6/lib/python3.6/site-packages/pip (python 3.6)

Command:

$ pip install sendgrid

Error:

Collecting sendgrid
  Retrying (Retry(total=4, connect=None, read=None, redirect=None, status=None)) after connection broken by 'SSLError(SSLError(1, '[SSL: TLSV1_ALERT_PROTOCOL_VERSION] tlsv1 alert protocol version (_ssl.c:841)'),)': /simple/sendgrid/
...
...
  Could not fetch URL https://pypi.org/simple/sendgrid/: There was a problem confirming the ssl certificate: HTTPSConnectionPool(host='pypi.org', port=443): Max retries exceeded with url: /simple/sendgrid/ (Caused by SSLError(SSLError(1, '[SSL: TLSV1_ALERT_PROTOCOL_VERSION] tlsv1 alert protocol version (_ssl.c:841)'),)) - skipping
  Could not find a version that satisfies the requirement sendgrid (from versions: )
No matching distribution found for sendgrid
Could not fetch URL https://pypi.org/simple/pip/: There was a problem confirming the ssl certificate: HTTPSConnectionPool(host='pypi.org', port=443): Max retries exceeded with url: /simple/pip/ (Caused by SSLError(SSLError(1, '[SSL: TLSV1_ALERT_PROTOCOL_VERSION] tlsv1 alert protocol version (_ssl.c:841)'),)) - skipping

I have tried all this solutions but none of them had work on SLES.

Any ideas?

Thanks in advance

Answer 1

You can ignore SSL errors by setting pypi.org and files.pythonhosted.org as trusted hosts.

pip install --trusted-host pypi.org --trusted-host files.pythonhosted.org <package_name>

Or:

Try installing using the wheel of the package

Answer 2

Finally I get it to work!

Seems that the openssl library that came installed by default on SLES 11 SP4 ( libopenssl-devel ) is really outdated ( OpenSSL 0.9.8 )

To verify this you can run:

$ python -c "import ssl; print(ssl.OPENSSL_VERSION)"
OpenSSL 0.9.8j-fips 07 Jan 2009

The trick is to uninstall libopenssl-devel and install libopenssl1-devel like this:

IMPORTANT: Note that you will be asked to take an option, please select deinstallation of libopenssl-devel-0.9.xx.xxx.xxx

$ sudo zypper install libopenssl1-devel

Loading repository data...
Reading installed packages...
Resolving package dependencies...

Problem: libopenssl1-devel-1.0.1g-0.58.9.1.x86_64 conflicts with libopenssl-devel < 1.0.1 provided by libopenssl-devel-0.9.8j-0.106.9.1.x86_64
 Solution 1: deinstallation of libopenssl-devel-0.9.8j-0.106.9.1.x86_64
 Solution 2: do not install libopenssl1-devel-1.0.1g-0.58.9.1.x86_64

Choose from above solutions by number or cancel [1/2/c] (c): 1
Resolving dependencies...
Resolving package dependencies...

The following NEW package is going to be installed:
  libopenssl1-devel 

The following package is going to be REMOVED:
  libopenssl-devel 

1 new package to install, 1 to remove.
Overall download size: 3.3 MiB. After the operation, 698.0 KiB will be freed.
Continue? [y/n/? shows all options] (y): 
Retrieving package libopenssl1-devel-1.0.1g-0.58.9.1.x86_64 (1/1), 3.3 MiB (19.6 MiB unpacked)
Retrieving: libopenssl1-devel-1.0.1g-0.58.9.1.x86_64.rpm [done]
Removing libopenssl-devel-0.9.8j-0.106.9.1 [done]
Installing: libopenssl1-devel-1.0.1g-0.58.9.1 [done]

Now procede to recompile/reinstall your python env with:

$ CFLAGS=-I/usr/include/openssl1 LDFLAGS=-L/usr/lib64 pyenv install 3.6.6

Finally verify that your OpenSSL version is the new one and proceed to install your package with pip :

$ python -c "import ssl; print(ssl.OPENSSL_VERSION)"
OpenSSL 1.0.1g 7 Apr 2014

$ pip install sendgrid

Hope it helps you!

Please see 'Security Module in SUSE Linux Enterprise 11' for more info