在 config/initalizers/redis.rb 中链接方式

if Rails.env.production?
    $redis = Redis.new(:host =>' XXXX', :password => "XXXX", :port => 6379, db: 2)
else
    $redis = Redis.new(:host => 'localhost', :port => 6379, db: 2)
end

出现异常 Redis::CommandError (ERR invalid password):

actioncable 中的 cable.yml 中 redis 配置

development:
  adapter: redis
  url: <%= ENV.fetch("REDIS_URL") { "redis://localhost:6379/1" } %>
  channel_prefix: friend_production

test:
  adapter: async

production:
  adapter: redis
  url: <%= ENV.fetch("REDIS_URL") { "redis://XXXX:6379" } %>
  password: 'XXXXXX'
  channel_prefix: friend_production

actioncable 能链接上 redis