SSL error: [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed (_ssl.c:581)

[catuss-a]

Hello guys,
I got this error when trying to use my custom certs. It works fine with docker so I suppose it comes from docker-compose. I looked back at the older issues and I already tried many versions of openssl.

I don't use boot2docker but my own vm made with vagrant/vbox. Docker CLI on my host (OSX) can easily talks with docker daemon located on the guest OS (ubuntu/trusty64).
I generated the certs by following the docker documentation.

$ docker-compose up
SSL error: [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed (_ssl.c:581)
$ docker run hello-world
Hello from Docker.
[...]
$ docker -v
Docker version 1.6.2, build 7c8fca2
$ docker-compose -v
docker-compose version: 1.3.1
CPython version: 2.7.9
OpenSSL version: OpenSSL 1.0.1j 15 Oct 2014
$ openssl version
OpenSSL 1.0.1o 12 Jun 2015