CRITICAL/MainProcess] Unrecoverable error: ReadOnlyError("You can't write against a read only replica.")

[danielgarcia0694]

I have this error with the redis container.

CRITICAL/MainProcess] Unrecoverable error: ReadOnlyError("You can't write against a read only replica.")

I use redis and celery to send mail, but after one or two hours the celery container restarts giving this error.

this is my redis configuration in the ycker docker yml

redis:
    restart: always
    image: redis
    ports:
      - 6379:6379
    volumes:
      - ./docker/prod/redis/my_redis.conf:/usr/local/etc/redis/my_redis.conf
    command:
      - redis-server

[wglambert]

https://redis.io/topics/replication#read-only-replica

Since Redis 2.6, replicas support a read-only mode that is enabled by default. This behavior is controlled by the replica-read-only option in the redis.conf file, and can be enabled and disabled at runtime using CONFIG SET.
Read-only replicas will reject all write commands, so that it is not possible to write to a replica because of a mistake.

Perhaps your celery container was previously writing to the master which allows writes, and after restart it targeted a read-only replica?

You could also try asking over at the Docker Community Forums, Docker Community Slack, or Stack Overflow. Since these repos aren't really a user-help forum

[itamarhaber]

Hello @danielgarcia0694

This symptom may indicate that your containerized Redis has been hacked and reconfigured as a read-only replica. I suggest you protect the Redis server with a password in the .conf file.

[danielgarcia0694]

@wglambert @itamarhaber

Thank you very much, I have made these adjustments so that in my replica you can write, I put a password since I was asked by celery to connect with redis.