Centos7 RabbitMQ installation environment

1 RabbitMQ concept

MQFull name MessageQueue, message queue ( MQ) is an application communication method according to the application. Applications to communicate through the message read out of the queue, without the need for a dedicated link to link them. Refers to message passing communication between a program in the data message transmitted by, rather than through direct calls to communicate with each other, it is a technique commonly called directly, such as remote procedure calls. It refers to the application queue by the queue to communicate. It removed using a queue and transmission requirements received concurrently executing applications.

2 Installation Rabbit

The overall environment:Centos 7

2.1 Erlang

2.1.1 What is Erlang

Erlang(['ə:læŋ])Is a universal language for concurrent programming, which consists of Swedish telecoms equipment maker Ericsson under the jurisdiction of CS-Labdevelopment, aims to create a way to deal with large-scale programming language and runtime environment concurrent activities

2.1.2 install erlang

2.1.2.1 Download erlang

Ready to install, download the installation files
wget https://packages.erlang-solutions.com/erlang-solutions-1.0-1.noarch.rpm
may error:

• Error message:Unable to establish SSL connection
• Solution: wgetThe version is too low, it is recommended to update wgetthe version update for wget command:yum update wget

2.1.2.2 upgrade erlang

Upgrade installed software:
rpm -Uvh erlang-solutions-1.0-1.noarch.rpm
possible error:

• error: Failed dependencies: epel-release is needed by erlang-solutions-1.0-1.noarch
• solve:yum install epel-release

2.1.2.3 Installation

Installation command: yum install erlang
注意：If it is Centos6.7a direct implementation of the above will get an error:

there is a problem: Error: Cannot retrieve metalink for repository: epel. Please verify its path and try againthe need to install epelsource

Solution: put /etc/yum.repos.d/epel.repothe file on 3-line comments 去掉, the fourth line 注释掉. details as follows:

打开/etc/yum.repos.d/epel.repo，将
[epel]
name=Extra Packages for Enterprise Linux 6 - $basearch
#baseurl=http://download.fedoraproject.org/pub/epel/6/$basearch
mirrorlist=https://mirrors.fedoraproject.org/metalink?repo=epel-6&arch=$basearch
修改为
[epel]
name=Extra Packages for Enterprise Linux 6 - $basearch
baseurl=http://download.fedoraproject.org/pub/epel/6/$basearch
#mirrorlist=https://mirrors.fedoraproject.org/metalink?repo=epel-6&arch=$basearch

If that does not work, change DNSto the /etc/resolv.confnext add this:

nameserver 8.8.8.8
search localdomain
然后重启network服务：service network restart

For not Centos 6.7being given to resolve:
If cd /var/cache/yum/x86_64/6/there is a folder erlang-solutionscan be solved as follows:
need the following:

• cd /var/cache/yum/x86_64/6/erlang-solutions
• Modifying primary.xml.gzthe shaencrypted value
• sha1sum primary.xml.gzIt will return an encrypted string after
• vim repomd.xmlIn repomd.xmlthe modification <data type="primary"> <checksum type="sha">results sha1sum command results</checksum>
• Finally, the implementation of yum install erlangit

2.1.2.4 see if the installation was successful

erl -version

RabbitMQ Server 2.2 installation

RabbitMQ Server 2.2.1 Download

wget https://www.rabbitmq.com/releases/rabbitmq-server/v3.5.1/rabbitmq-server-3.5.1-1.noarch.rpm
If the download fails, do not download or down, enter the download link in a browser, and then import into, and can also be

2.2.2 import and install secret key

Import keys: rpm --import http://www.rabbitmq.com/rabbitmq-signing-key-public.asc
Installation:yum install rabbitmq-server-3.5.1-1.noarch.rpm

2.3 Starting RabbitMQ

2.3.1 adding boot from Kai

chkconfig rabbitmq-server on

2.3.2 Management rabbitMQ Service

• start up:/sbin/service rabbitmq-server start
• shut down:/sbin/service rabbitmq-server stop
• Restart:/sbin/service rabbitmq-server restart

3 install the Web management interface plug-in

3.1 installation command

rabbitmq-plugins enable rabbitmq_management

After a successful installation 3.2 Content

	The following plugins have been enabled:
	  mochiweb
	  webmachine
	  rabbitmq_web_dispatch
	  amqp_client
	  rabbitmq_management_agent
	  rabbitmq_management
	Plugin configuration has changed. Restart RabbitMQ for changes to take effect.

3.3 Detection mounted state

rabbitmqctl status
as follows:

3.4 ip remote login settings RabbitMQ

Here we have to create a rabbitmqusername, password 123456, for example, create an account and supports remote ip access.

3.4.1 Create an account

rabbitmqctl add_user rabbitmq 123456

3.4.2 Set User Role

rabbitmqctl set_user_tags rabbitmq administrator

3.4.3 Set user rights

rabbitmqctl set_permissions -p "/" rabbitmq ".*" ".*" ".*"

3.4.4 View current users and roles

rabbitmqctl list_users

3.5 Login

Enter the serverip:15672browser: . Which serveripis the RabbitMQ-Serverip host host.

3.6 java call connection refused

3.6.1 User name Password wrong

Error:
ACCESS_REFUSED - Login was refused using authentication mechanism PLAIN. For details see the broker logfile.
Solution:

• Under carefully check the account password is correct
• After logging in to the following Can access virtual hostsmodifications to/
  

3.6.2 Centos7 change the host name in two places consistent

For Centos7To modify the host name remains, then use hostnamectl

as well as in /etc/hoststhis document have to change it

注意：if rabbitmqstarted for a long time, or close for a long time, indicating that the host name is inconsistent, which led to javathe connection will be timed out