catalogue

concept

Four concepts

Producer

Switch

Queue

Consumer

Six modes

working principle

Download

Installation

Docker installing RabbitMQ

concept

Rabbit is a message oriented middleware that can accept and forward messages. You can regard it as an express site. When you want to send a package, you put your package in the express station, and the courier will eventually send your express to the recipient. According to this logic, RabbitMQ is an express station, and a courier will deliver the express for you. The difference between RabbitMQ and express station is that it does not handle express, but accepts, stores and forwards messages!

Four concepts

Producer

The program that generates data and sends messages is the producer!

Switch

Switch is a very important part of RabbitMQ. On the one hand, it accepts messages from producers, on the other hand, it pushes messages to queues. The switch must know exactly how to handle the messages it receives, whether to push these messages to a specific queue or multiple queues, or discard the messages, which depends on the switch type

Queue

Queue is a data structure used internally by RabbitMQ. Although messages flow through RabbitMQ and applications, they can only be stored in the queue. The queue is only constrained by the memory and disk limitations of the host. It is essentially a large message buffer. Many producers can send messages to a queue, and many consumers can try to accept messages from a queue. This is how we use queues.

Consumer

Consumption and acceptance have similar meanings. Most of the time, consumers are a program waiting to receive messages. Please note that producers, consumers and message middleware are often not on the same machine. The same application can be both producers and consumers.

Six modes

Simple mode (Hello World!) Work queues, publish / subscribe

, routing, topics, publisher confirmations

working principle

Download

CentOS7 and rabbit mq3 are used this time Version 8.8

        1. Enter RabbitMQ and click Get Started

 

2. View the Erlang version support required by the current RabbitMq

        3. Download Erlang( Erlang and Elixir Packages Download - Erlang Solutions)

         4. Download RabbitMQ

Find release Journal

Find the corresponding version and click release notes

Go down to Assets and click download

Installation

1. Upload the corresponding rpm package to linux. FinalShell is used this time

2. Installation documents

-- 1,install Erlang
rpm -ivh --force --nodeps esl-erlang_23.0-1_centos_7_amd64.rpm 

-- 2,install socat
 yum install socat -y

-- 3,install RabbitMQ
rpm -ivh rabbitmq-server-3.8.8-1.el7.noarch.rpm

-- 4,Configure startup and self startup
chkconfig rabbitmq-server on

-- 5,start-up RabbitMQ
/sbin/service rabbitmq-server start

3. Install the web management interface

-- install web Interface
rabbitmq-plugins enable rabbitmq_management

-- Check whether the port is open
firewall-cmd --zone=public --list-ports

-- Open 15672 port
firewall-cmd --zone=public --add-port=15672/tcp --permanent

-- Effective immediately
firewall-cmd --reload

4. Access the web management interface (localhost:15672)

5. Add an account

-- 1,Add user
rabbitmqctl add_user admin admin

-- 2,Set user assigned operation permissions
    - administrator You can log in to the console and view all information rabbitmq Manage
    - monitoring The monitor logs in to the console to view all information
    - policymaker The policy maker logs in to the console and specifies the policy
    - managment General administrator login console
rabbitmqctl set_user_tags admin administrator

-- 3,Change Password
rabbitmqctl change_password Username NewPassword

-- 4,View user list
rabbitmqctl list_users

6. Login

Docker installing RabbitMQ

1. Install docker

-- 1,Remove old version
yum remove docker \
docker-client \
docker-client-latest \
docker-common \
docker-latest \
docker-latest-logrotate \
docker-logrotate \
docker-engine

-- 2,Install the installation package that needs to be installed
yum install -y yum-utils

-- 3,Set up mirror warehouse
yum-config-manager --add-repo http://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo

-- 4,to update yum Index of the package
yum makecache fast

-- 5,install docker Related content
yum install docker-ce docker-ce-cli containerd.io

-- 6,start-up docker
systemctl status docker

-- 7,see docker Is the installation successful
docker version

2. Basic download methods provided on the official website( Downloading and Installing RabbitMQ — RabbitMQ)

- 1,3.9 Download of the latest version
docker run -it --rm --name rabbitmq -p 5672:5672 -p 15672:15672 rabbitmq:3.9-management

- 2,3.8 Under version
docker run -it --rm --name rabbitmq -p 5672:5672 -p 15672:15672 rabbitmq:3.8-management

3. Details of docker's official website( Docker Hub)

 

docker run -d --hostname my-rabbit --name some-rabbit -e RABBITMQ_DEFAULT_USER=user -e RABBITMQ_DEFAULT_PASS=password rabbitmq:3-management

4. View the graphical interface