SSL Error Redis

[Michae94]

Issue Summary

This follow the first ticket #3999 .
SSL Certificate verify failed

Steps to Reproduce

1. I added in my .env file :
   REDASH_REDIS_URL
   REDASH_CELERY_BROKER_SSL_CA_CERTS
   REDASH_DATABASE_URL
   Then I use the next command :
   ./bin/run celery worker --app=redash.worker --beat -Qscheduled_queries,queries,celery -c2
   I get the following error when I try to connect to the URL http://127.0.0.1:5000/
   ConnectionError: Error 1 connecting to c7b2fac8-b71e-4936-a9a4-47fa7b461b47.bc28ac43cf10402584b5f01db462d330.databases.appdomain.cloud:30684. [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed (_ssl.c:726).

I am trying to connect my redash installed on my VM with ressources on IBM cloud : Redis (and Postgres). That is why I have to use an SSL connection.

Any idea?

Technical details:

• Redash Version: last commit (22 June 2019)
• Browser/OS: Redhat Linux (RHEL 8.0)
• How did you install Redash: on a VM (Virtualbox), developer install

[Michae94]

So I modified the code itself to import my certificate inside the command "StrictRedis" and it looks like it worked. I'll make a pull request if I manage to pass all the tests.
I don't really understand what was done with the import of certificate from .env in celery but I think that was not enough.