Shulou(Shulou.com)06/01 Report--

The files related to the rabbitmq environment installed by me can be downloaded from the Baidu cloud disk resources provided by me.

Link: https://pan.baidu.com/s/1bnofK3l password: whdm

A preface

Message queue, also known as MQ, is a message communication tool between applications, which is conducive to program decoupling, multi-language integration, asynchronous communication, extension and simple load balancing, etc., and is a typical representative of the production-consumer model. Common MQ products include RabbitMQ ZeroMQ Kafka and so on.

RabbitMQ, veteran MQ products, based on erlang language, achieve support for AMQP and other protocols, heavyweight, suitable for enterprise application development

Kafka,linkedin open source MQ products pursue high throughput and are suitable for a large amount of data collection business, such as a large amount of log data generated by Internet business

ZeroMQ, which claims to be the fastest MQ, provides a set of asynchronous message communication libraries to implement advanced complex queues that cannot be implemented by RabbitMQ.

Both Kafka and RabbitMQ need to build a message proxy server and adopt the middleware mode. ZeroMQ adopts non-middleware mode, so there is no need to build a message proxy server.

In the following period of time, I will spend most of my spare time studying these MQ products, but the level is limited for the time being, and I still need a little research on their specific usage scenarios and differences. Today, let's start with a simple RabbitMQ installation tutorial, the system is centos7.

Second, install erlang

RabbitMQ is implemented in Erlang language. Erlang is a new language designed to write concurrent, real-time, distributed systems. It was originally developed for telephone exchanges. The following source code is compiled and installed.

1. Download the source code

Http://www.erlang.org/download.html downloads the latest version of the erlang installation package.

two。 Decompression and installation

$tar xvf otp_src_19.1.tar.gz

$. / configure-prefix=/usr/local/erlang-without-javac

$make

$make install

3. Configure environment variables

Create a new erlang.sh under / etc/profile.d/

$vim / etc/profile.d/erlang.sh

Add the following:

PATH=$PATH:/usr/local/erlang/bin

Export PATH

Make the environment variable effective as follows

$source / etc/profile.d/erlang.sh

4. Simple experience

Hello World program experience:

$vim hello.erl

HellWorld example

We define a module called foo

-module (hello).

Export the function print that has 0 arguments

-export ([print/0])

Print ()->

Io:format ("Hello WorldShop n").

$erlc hello.erl / / compile

$erl / / Interactive command line mode execution

The effect is as follows:

The experiment was a success!

Third, install rabbitmq

1. Install dependencies

Everyone's system has installed some software by default. I need to install three dependencies here.

$yum install-y libxslt rsync zip

two。 Download the rabbitmq binary package

$cd / usr/local

$wget http://www.rabbitmq.com/releases/rabbitmq-server/v3.6.5/rabbitmq-server-3.6.5.tar.xz

3. Installation

It is easy to install using a binary package, as follows:

$cd / usr/local/

$tar Jxvf rabbitmq-server-3.6.5.tar.xz-C.

$ln-s rabbitmq_server-3.6.5 rabbitmq

The rabbit installation directory is / usr/local/rabbitmq

4. Configure environment variables

Create a new rabbitmq.sh in / etc/profile.d/

$vim / etc/profile.d/rabbitmq.sh

Add the following:

PATH=$PATH:/usr/local/rabbitmq/sbin

Export PATH

Make the environment variable effective as follows

$source / etc/profile.d/rabbitmq.sh

5. About rabbitmq Operation

a. Start

The front desk runs:

$rabbitmq-server

Run in the background:

$rabbitmq-server-detached

b. Close

$rabbitmqctl stop

c. View statu

$rabbitmqctl status

Third, about the WEB management plug-in

RabbitMQ provides a set of plug-in mechanism to facilitate functional expansion. Here is one of the most commonly used plug-ins, rabbitmq_management. This plug-in provides comprehensive management and monitoring functions, as well as indicators, which will be described in a later article. First of all, try it and open it in the following way.

1. Enable plug-in

Through the rabbitmq-plugin Management snap-in, the rabbitmq_management plug-in is enabled as follows:

$rabbitmq-plugins enable rabbitmq_management

You can log in to access http://localhost:15672 by using the default user guest and password guest. However, remote access is not possible at this time, but most of the actual scenarios are remote.

The following addresses remote access issues:

two。 Confirm to turn off the firewall

If you cannot remotely log in to access the http://host:15672, make sure that the firewall is turned off. The firewall of my system has been turned on, and the method of closing it is as follows:

$iptables-F

My system centos7, the mechanism of different systems need to be confirmed by themselves.

3. Environment variable

There are three RabbitMQ environment variables:

"system built-in

"rabbitmq-env.conf set variable

"shell environment variable

Priority: shell environment variable > rabbit-env.conf > system built-in

Set by rabbit-env.conf here, etc/rabbitmq/rabbitmq-env.conf under the RabbitMQ installation directory:

$cd / usr/local/rabbitmq/

$vim etc/rabbitmq/rabbitmq-env.conf

Specify the rabbitmq profile as follows:

RABBITMQ_CONFIG_FILE=/usr/local/rabbitmq/etc/rabbitmq/rabbitmq

The above environment variable specifies the rabbitmq configuration file. You need to add the suffix .config, that is, the real file is / usr/local/rabbitmq/etc/rabbitmq/rabbitmq.config:

4. Configure remote access

For enabling guest remote access, the official website http://www.rabbitmq.com/access-control.html has the following paragraph:

Modify the RabbitMQ configuration file as required, as follows:

$vim etc/rabbitmq/rabbitmq.config

Add the following:

[{rabbit, [

{tcp_listeners, [5672]}

{loopback_users, []}

]}].

At this point, visit http://remote_ip:15672 as follows:

The default user name guest and password guest are as follows:

The above is an overview of the status of the RabbitMQ runtime.

At this point, RabbitMQ installs everything OK!

So much for the simple installation of RabbitMQ, specific configuration, use and monitoring and other system skills and other MQ-related knowledge can only be continued.

Reference documentation:

About getting started with Erlang

Http://www.erlang.org/downloads

Http://www.csdn.net/article/2015-10-26/2826038-Erlang

Http://www.csdn.net/article/2015-10-26/2826038-Erlang

About mq

Http://www.rabbitmq.com/access-control.html

Http://www.infoq.com/cn/articles/kafka-analysis-part-1/

Https://www.zhihu.com/question/22480085

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