CentOS7 installation/uninstallation of rabbitmq and stepping on the pit (detailed) record

Table of contents

1. The RabbitMQ server needs to install erlang before installation.

 Two, erlang installation

Method 1: rpm package installation method

Method 2: Source code installation method

 3. Download and install socat

4. Download the RabbitMQ rpm installation package

5. Start rabbitmq

Six, rabbitmq and erlang uninstall

1. Uninstall rabbitmq

        2. Uninstall erlang

7. Possible problems:

View error log command: journalctl -xe

问题1：ERROR: epmd error for host 192: badarg (unknown POSIX error)

问题2： /usr/sbin/rabbitmq-server: line 16: /usr/sbin/rabbitmq-env: No such file or directory

问题3、/usr/lib/rabbitmq/bin/rabbitmq-env: line 179: exec: erl: not found

rabbitmq /usr/lib/rabbitmq/bin/rabbitmq-server: line 85: erl: command not found

问题4、error: Failed dependencies: erlang >= 23.2 is needed by rabbitmq-server-3.8.

---

1. The RabbitMQ server needs to install erlang before installation.

For the dependencies between specific versions, please check the official website, RabbitMQ Erlang Version Requirements — RabbitMQ

 Here are some examples:

 

 Two, erlang installation

Method 1: rpm package installation method

• Download the Erlang  rpm installation package
  RPM  Download package version address: rabbitmq/erlang - Packages · packagecloud

 Select the corresponding version of the erlang package that meets the dependencies, el/7, and the number 7 represents the system version.

 Click the link to enter the detailed page and get the download link:

wget --content-disposition https://packagecloud.io/rabbitmq/erlang/packages/el/7/erlang-23.3.4.11-1.el7.x86_64.rpm/download.rpm

Select a directory file to store the current rpm, which is placed  /usr/local/rabbitMQ/ under the folder

 

cd /usr/local/rabbitmq/
# 安装
rpm -ivh erlang-23.3.4.11-1.el7.x86_64.rpm

# 查看版本
erl -v

Method 2: Source code installation method

1. First install some required dependencies:

yum -y install gcc glibc-devel make ncurses-devel openssl-devel xmlto perl wget

 2. Download the corresponding version of Erlang

If the online download is too slow, you can pre-download it elsewhere and upload it to the server

3. Unzip, compile and install

cd /usr/local
mkdir erlang
tar -zxvf otp_src_24.0.tar.gz
cd otp_src_24.0
./configure --prefix=/usr/local/erlang

This process may take a long time. If there is an err in the configure process, to solve the dependency problem, info and warn will have no effect.
If there is APPLICATIONS INFORMATION, DOCUMENTATION INFORMATION, it has no effect.

make && make install

This process may take a long time, if there is a prompt that other dependent packages are missing, follow the prompts to install

yum install -y 缺少的依赖xxx

 4. Configure environment variables and compile to take effect

After the installation is complete, configure the environment variable /etc/profile

vim /etc/profile

Add a line at the end

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

wq save and exit

Compilation takes effect

source /etc/profile

5. Verify that Erlang is installed successfully

Enter erl, the version information will appear, that is, the installation is successful

# erl -v

Exit the erlang command line:

halt().

 3. Download and install socat

 [socat download address]: RPM resource socat(x86-64)

 

 After downloading, go to the download directory and execute the following command:

# 安装命令
rpm -ivh socat-1.7.3.2-2.el7.x86_64.rpm 

4. Download the RabbitMQ rpm installation package

[rabbitmq download address]: Releases · rabbitmq/rabbitmq-server · GitHub

or address:

GitHub - rabbitmq/rabbitmq-server: Open source RabbitMQ: core server and tier 1 (built-in) plugins

安装命令
# rpm -ivh rabbitmq-server-3.8.26-1.el7.noarch.rpm

5. Start rabbitmq

1、
# 启动rabbitmq
systemctl start rabbitmq-server

# 查看rabbitmq状态
systemctl status rabbitmq-server

2、	配置用户和权限
rabbitmqctl list_users
rabbitmqctl add_user root 123456
rabbitmqctl set_permissions -p "/" root ".*" ".*" ".*"
rabbitmqctl delete_user guest
rabbitmq-plugins enable rabbitmq_management
rabbitmqctl change_password root '123456'
rabbitmqctl set_user_tags root administrator

 /etc/rabbitmq/rabbitmq.config will be created automatically when it is opened for the first time, just enter the content directly in it.

3、	配置外部访问
vi /etc/rabbitmq/rabbitmq.config
修改所在行如下图所示

[{rabbit,[{loopback_users,[]}]}].

 

Six, rabbitmq and erlang uninstall

1. Uninstall rabbitmq

Stop the rabbitmq service before uninstalling

service rabbitmq-server stop

View the related list of rabbitmq installations

yum list | grep rabbitmq

Uninstall the related content that rabbitmq has installed

yum -y remove rabbitmq-server.noarch

2. Uninstall erlang

See related list of erlang installations

yum list | grep erlang

Uninstall the related content that erlang has installed

yum -y remove erlang-*
yum remove erlang.x86_64

7. Possible problems:

View error log command: journalctl -xe

# journalctl -xe

Question 1:ERROR: epmd error for host 192: badarg (unknown POSIX error)

ERROR: epmd error for host "77":badarg (unknown POSIX error) 

Solution: Edit: add a line to vi /etc/rabbitmq/rabbitmq-env.conf

# vi /etc/rabbitmq/rabbitmq-env.conf 

Add this line in the file: NODENAME=rabbit@localhost, save (note: the rabbitmq-env.conf file does not exist, it will be created automatically after opening)

NODENAME=rabbit@localhost

 As shown below:

 

 Start again: service rabbitmq-server start

# service rabbitmq-server start

 

 Started successfully!

问题2： /usr/sbin/rabbitmq-server: line 16: /usr/sbin/rabbitmq-env: No such file or directory

Solution: These problems are due to the lack of certain environment configuration files during installation. You only need to use the which command and the find command to find the corresponding file and copy it to the corresponding location, or create a soft link directly.

For example: the error is missing the rabbitmq-env file, let's find out where the existing file is

# which rabbitmq-env

Or search in the root directory to find the file information missing in the error report, and after getting the path of the file, copy the file to the required directory

 find / -name rabbitmq*

You can copy the following file to the missing directory where the error was reported, and restart.

 

启动rabbitmq 
service rabbitmq-server start

问题3、/usr/lib/rabbitmq/bin/rabbitmq-env: line 179: exec: erl: not found

rabbitmq /usr/lib/rabbitmq/bin/rabbitmq-server: line 85: erl: command not found

Solution: These problems are caused by the installation of the erlang package. After installation, the environment variables are not configured properly. For this step, see the erlang installation content in step 2 for details.

Query the erlang version: If you can find the erlang version, this kind of problem will basically not occur.

# erl -v

Exit the erlang command line:

halt().

问题4、error: Failed dependencies: erlang >= 23.2 is needed by rabbitmq-server-3.8.

Solution: This kind of problem is the dependency problem encountered when installing the rabbitmq-server-xx.rpm package, just add --nodeps at the end to remove the dependency installation

For example:

# rpm -ivh rabbitmq-server-3.8.26-1.el7.noarch.rpm --nodeps

Start the rabbitmq 
service rabbitmq-server start

-------------------------------------------------- ---------------------------------------- No text below ------- -------------------------------------------------- --

Note: For study only, record questions and reference, encourage each other!

Reference article:

1. [Records of installing/uninstalling RabbitMQ in Linux]_SLAG-man. Muzi's Blog-CSDN Blog_Linux uninstall rabbitmq

2. Install RabbitMQ and erlang in centos7_Program Factory Blog-CSDN Blog

3. Install rabbitmq mining pit on CentOS7.5 - short book

4. Linux Environment RabbitMQ Installation Tutorial - Bug Destroyer - Blog Garden

5. The detailed process of installing Erlang and RabbitMQ in the Centos7 environment (with pictures)_Missed time blog-CSDN blog_centos7 erlang

6. CentOS 6.8 installs RabbitMQ and prompts ERROR: epmd error for host "77": badarg (unknown POSIX error)_dw_java08's Blog-CSDN Blog_epmd error for host 192: badarg (unknown posix err

7. ERROR: epmd error for host 192: badarg (unknown POSIX error)_crazy world. Blog-CSDN blog_error: epmd error for host 192: badarg (unknown po