Warnings when installing Let's encrypt on Ubuntu 14.04

[LaurentR2D2]

Hello,

When I try yo install Let's encrypt extension on Ubuntu Trusty, and le-installer is launched, I get this warning :

Creating virtual environment...
Updating letsencrypt and virtual environment dependencies...
/usr/local/psa/var/modules/letsencrypt/venv.8oGbY/local/lib/python2.7/site-packages/pip/_vendor/requests/packages/urllib3/util/ssl_.py:315: SNIMissingWarning: An HTTPS request has been made, but the SNI (Subject Name Indication) extension to TLS is not available on this platform. This may cause the server to present an incorrect TLS certificate, which can cause validation failures. For more information, see https://urllib3.readthedocs.org/en/latest/security.html#snimissingwarning.
SNIMissingWarning

Looking at the webpage mentioned above, I see that it's a problem of Python's version, and that to fix that I should install pyOpenSSL (python3-openssl package under Ubuntu). Is it enough just to install this package, or should I do something else after ? I've read that when pyOpenSSL is installed using "pip" command :

To use the Python OpenSSL bindings instead, you’ll need to install the required packages:

$ pip install pyopenssl ndg-httpsclient pyasn1

If cryptography fails to install as a dependency, make sure you have libffi available on your system and run pip install cryptography.

Once the packages are installed, you can tell urllib3 to switch the ssl backend to PyOpenSSL with inject_into_urllib3():

import urllib3.contrib.pyopenssl
urllib3.contrib.pyopenssl.inject_into_urllib3()

Now you can continue using urllib3 as you normally would.

 

[LaurentR2D2]

I've still tried to install a certificate on a domain, and I get an error message. I don't know if it is related to the warning above :

Erreur: Échec de l'installation du certificat SSL Let's Encrypt : Failed letsencrypt execution: Traceback (most recent call last):
File "/opt/psa/var/modules/letsencrypt/venv/bin/letsencrypt", line 11, in <module>
sys.exit(main())
File "/usr/local/psa/var/modules/letsencrypt/venv.8oGbY/local/lib/python2.7/site-packages/letsencrypt/main.py", line 658, in main
"--strict-permissions" in cli_args)
File "/usr/local/psa/var/modules/letsencrypt/venv.8oGbY/local/lib/python2.7/site-packages/letsencrypt/le_util.py", line 105, in make_or_verify_dir
os.makedirs(directory, mode)
File "/usr/local/psa/var/modules/letsencrypt/venv.8oGbY/lib/python2.7/os.py", line 157, in makedirs
mkdir(name, mode)
OSError: [Errno 13] Permission denied: '/opt/psa/var/modules/letsencrypt/etc'

 

[LaurentR2D2]

I've still tried to install a certificate on a domain, and I get an error message. I don't know if it is related to the warning above :

I've solved this problem. Watching all the errors messages, I've created the necessary folders with the good ownership. Now I have a certificate. I just need an answer for my first post

Thank you

 

[UFHH01]

Hi LaurentR2D2,

"normally", it should be sufficient to upgrade Python to > 2.7.11, so your choice to upgrade to Python 3 "should" solve your first warning.
Why the "" in the sentence? Well, there are always possible errors/issues/situations, where you have to add additional commands, but we can not guess them all, so I quoted some words in my answer.