I ran a redis container with the following command:

docker run  --name redis_env --hostname redis \
 -p 6379:6379 \
 -v $PWD/DBVOL/redis/data:/data:rw \
 --privileged=true \
 -d redis redis-server

I successfully used Redis Desktop Manager to link this Redis server on this machine, but when I used scrapy-redis to build a distributed crawler according to the document, I got an error message rejecting the connection:

My settings.py is configured as:

# Redis Server settings
 REDIS_URL = 'redis://127.0.0.1:6379/0'
 
 # Enable Redis to Schedule Storage Request Queue
 SCHEDULER = 'scrapy_redis.scheduler.Scheduler'
 
 # Make sure all crawlers are rewired by redis
 DUPEFILTER_CLASS = 'scrapy_redis.dupefilter.RFPDupeFilter'
 
 # Do not clear the Redis queue, so crawling can be paused/resumed
 SCHEDULER_PERSIST = True
 
 # Configure item pipelines
 # See  https://doc.scrapy.org/en/latest/topics/item-pipeline.html
 
 ITEM_PIPELINES = {
 #'GeoCrawler.pipelines.GeocrawlerPipeline': 300,
 'scrapy_redis.pipelines.RedisPipeline': 300
 }

I also tried to link redis server directly using python console, and there was no problem:

>>> import redis
 >>> redis.connection("redis://localhost:6379/0")
 Connection<host=redis://localhost:6379/0,port=6379,db=0>

May I ask what exactly is the reason? How to solve it? Please give your advice, thank you! ! !