ps -ef | grep rabbit
如果存在多個rabbitmq版本，通過命令查看
service rabbitmq-server status
切換到RabbitMQ的安裝目錄的plugins目錄，我的是在/usr/lib/rabbitmq/lib/rabbitmq_server-3.7.7/plugins
wget https://dl.bintray.com/rabbitmq/community-plugins/3.7.x/rabbitmq_delayed_message_exchange/rabbitmq_delayed_message_exchange-20171201-3.7.x.zip
解壓（沒有unzip的需要先安裝 yum install unzip）
unzip -zxvf rabbitmq_delayed_message_exchange-20171201-3.7.x.zip
切換到sbin目錄下面,啟用該插件
./rabbitmq-plugins enable rabbitmq_delayed_message_exchange
重啟服務
service rabbitmq-server restart
