SSL Certification Verify Failed on Heroku Redis

Question

I'm deploying a flask app on Heroku using a Redis premium plan. I get the following error: 'SSL Certification Verify Failed'. Attempted fixes:

• Downgrading to Redis 5
• Passing ssl_cert_reqs=None to the Redis constructor in redis-py

A solution to this problem could be:

1. Explain how to disable TLS certification on heroku redis premium plans
2. Explain how to make TLS certification work on heroku redis premium plans

From Heroku's docs, this may be a hint: 'you must enable TLS in your Redis client’s configuration in order to connect to a Redis 6 database'. I don't understand what this means.

Answer 1

You can disable TLS certification on Heroku by downgrading to Redis 5 and passing ssl_cert_reqs=None to the Redis constructor.

$ heroku addons:create heroku-redis:premium-0 --version 5

from redis import ConnectionPool, Redis
import os
connection_pool = ConnectionPool.from_url(os.environ.get('REDIS_URL'))
app.redis = Redis(connection_pool=connection_pool, ssl_cert_reqs=None)

My mistake was not doing both at the same time.

An ideal solution would explain how to configure TLS certification for Redis 6.