在安装 RabbitMQ 插件时，通常会通过命令行来验证插件是否成功启用

验证 RabbitMQ 插件是否成功启用的方法

RabbitMQ 提供了多种方式来管理其插件状态，其中包括通过命令行工具 rabbitmq-plugins 来查看当前已启用的插件列表。以下是具体的操作方法：

使用 rabbitmq-plugins list 命令

要检查某个特定插件是否已被启用，可以运行以下命令：

rabbitmq-plugins list

该命令将列出所有可用插件及其状态（enabled 或 disabled）。例如，如果之前启用了 rabbitmq_message_timestamp 插件，则可以在输出中找到类似以下的内容：

[rabbitmq_message_timestamp]  enabled

检查日志文件确认启动过程

另一种验证方法是查阅 RabbitMQ 的日志文件以确保插件在服务器初始化期间被正确加载。默认情况下，这些日志位于 /var/log/rabbitmq/ 目录下，主要包括两个主要的日志文件：一个是常规日志 (rabbit@hostname.log)，另一个则是升级日志 (rabbit@hostname_upgrade.log)。可以通过 grep 工具搜索关键字 “completed with X plugins” 来判断是否有预期数量的插件被激活：

grep 'completed with' /var/log/rabbitmq/rabbit\@localhost.log

正常情况下，你会看到类似于这样的记录：

Starting broker...
completed with 6 plugins.

解决可能遇到的问题

有时可能会因为权限不足或其他原因导致无法写入到配置目录从而阻止插件生效。假如尝试启用插件时报错提示缺少 /etc/rabbitmq/enabled_plugins 文件路径访问权时，需手动创建相应目录结构并赋予适当权限给 RabbitMQ 用户账户使用：

sudo mkdir -p /etc/rabbitmq/
sudo touch /etc/rabbitmq/enabled_plugins
sudo chown rabbitmq:rabbitmq /etc/rabbitmq/enabled_plugins

以上步骤完成后重新执行插件使能指令即可解决问题。

在安装 RabbitMQ 插件时，通常会通过命令行来验证插件是否成功启用。对于rabbitmq_delayed_message_exchange这个插件，你可以在安装后执行如下命令以确认其状态：

rabbitmq-plugins list | grep delayed_message_exchange

如果插件已成功启用，上述命令应该会显示enabled或(enabled)，表示该插件有效并正在运行。

然而，关于验证RabbitMQ仓库的有效性，这里提到的是验证插件的状态而非仓库本身。RabbitMQ仓库的有效性通常取决于你的包管理器（如Erlang Package Manager (EPM) 或者如果你从GitHub克隆仓库），确保你已经正确地设置了源和权限。一般来说，安装过程中如有错误或无法找到所需的插件，才是仓库有效性的问题。
要查看RabbitMQ的全局配置文件并确认插件设置，首先定位到基础配置文件的位置，这通常是etc/rabbitmq/目录下的rabbitmq.conf文件。这个文件会列出一些关键配置，包括listeners部分，用于指定RabbitMQ监听的网络端口和其他基本信息。

打开该文件后，可以逐行查找与插件相关的配置，如rabbitmq_management（如果安装了管理插件）或者自定义编写的插件配置。如果你想要确认某个特定插件的设置，可能需要查阅RabbitMQ文档或插件的官方说明，因为详细信息可能会分散在不同的配置选项中。

RabbitMQ的配置主要集中在两个文件中：

1. CONFIG_FILE 或者 rabbitmq 文件夹下的 rabbitmq.config：这是基础配置文件，包含了基本的配置选项如节点名称（NODENAME）、监听端口（NODE PORT）以及Mnesia数据库的位置（MNE5IA BA5E）。这个文件通常不需要经常修改，除非有特殊需求。

2. rabbitmq-env.conf (默认位于 $RABBITMQ_HOME/etc/rabbitmq/，可通过环境变量RABBITMQ_CONF_ENV_FILE指定位置)：这是一个环境变量定义文件，用于设置更具体的运行时参数，比如节点名（NODENAME）、配置文件目录（CONFIG FILE），以及可能的额外环境变量。这些设置可以根据特定环境和需求进行调整。

一般来说，RabbitMQ配置文件会保持整洁和简洁，以避免不必要的改动。在生产环境中，可能会有专门的配置管理和监控工具来管理这些文件，以保证系统的稳定性和安全性。
To install Hudson on Debian or Ubuntu-based systems using apt-get, follow these steps:

1. Update your package index: Ensure your system has the latest package information.

   sudo apt-get update
   

2. Check the distribution version: Identify which package series corresponds to your operating system. For example, if you’re using Ubuntu 18.04, use “bionic” and for Ubuntu 16.04, use “xenial”.

3. Add the RabbitMQ repository: Add the appropriate repository to your sources.list file, usually located at /etc/apt/sources.list.d/.

   echo "deb http://packages.erlang-solutions.com/debian <distro_name> contrib" | sudo tee /etc/apt/sources.list.d/rabbitmq.list
   

4. Add the GPG key: To verify the authenticity of the repository, add the GPG key.

   curl -s https://packages.erlang-solutions.com/erlang_solutions.asc | sudo apt-key add -
   

5. Install Hudson: Finally, install Hudson with apt-get after updating the package cache again.

   sudo apt-get upgrade
   sudo apt-get install hudson
   

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Overview

This guide covers RabbitMQ installation on Debian, Ubuntu and distributions based on one of them.

RabbitMQ is included in standard Debian and Ubuntu repositories. However, the versions included are usually months or even years behind latest RabbitMQ releases, and thus are out of support.

RabbitMQ release artifacts include a Debian package. Team RabbitMQ also maintains our own apt repositories.

Main topics covered in this guide are

Ways of installing the latest RabbitMQ version on Debian and Ubuntu
Supported Ubuntu and Debian distributions
How to install RabbitMQ using apt from Bintray or Package Cloud, including a quick start snippet
How to install a recent supported Erlang version using apt
Version Pinning of apt packages
Privilege requirements
Direct download from GitHub
How to manage the service
How to inspect node and service logs

and more.
How to Install Latest RabbitMQ on Debian and Ubuntu

There are two ways to install the most recent version of RabbitMQ on Debian and Ubuntu:

Using an apt repository on Package Cloud or Bintray (this option is highly recommended)
Downloading the package and installing it manually with dpkg -i. This option will require manual installation of all package dependencies.

This guide covers both options. In both cases, a supported version of Erlang has to be installed. On Debian and Ubuntu, the easiest way to do that is via apt.
Supported Distributions

Below is a list Debian-based distributions supported by recent RabbitMQ releases:

Ubuntu 14.04 through 19.04
Debian Stretch (9), Buster (10) and Sid ("unstable")

The package may work on other Debian-based distributions if dependencies are satisfied (e.g. using the Wheezy backports repository) but their testing and support is done on a best effort basis.
Where to Get Recent Erlang Version on Debian and Ubuntu

RabbitMQ needs Erlang/OTP to run. Erlang/OTP packages in standard Debian and Ubuntu repositories can be significantly out of date and not supported by modern RabbitMQ versions.

Most recent Erlang/OTP release series are available from a number of alternative apt repositories:
Erlang Release Series Repositories that provide it Notes
22.x

Debian packages of Erlang by Team RabbitMQ
Erlang Solutions

Supported starti