我正在尝试按照以下说明在 Red Hat（Enterprise Linux 7 64 位工作站版本）的评估虚拟机上安装 RabbitMQhttps://www.rabbitmq.com/install-rpm.html https://www.rabbitmq.com/install-rpm.html.
我已经从源代码安装了 Erlang 的零依赖版本：https://github.com/rabbitmq/erlang-rpm https://github.com/rabbitmq/erlang-rpm。安装没有错误，我将其 /bin 目录添加到我的路径中。
当我尝试使用安装 RabbitMQ 时yum install rabbitmq-server-3.7.4-1.el7.noarch.rpm，它失败并告诉我它需要 Erlang 版本 >= 19.3，即使我当时从源代码安装了最新版本的 Erlang (OTP v20.3)。以下是我尝试安装 RabbitMQ 时的完整输出：
$ sudo yum install rabbitmq-server-3.7.4-1.el7.noarch.rpm
Loaded plugins: langpacks, product-id, search-disabled-repos, subscription-
: manager
Examining rabbitmq-server-3.7.4-1.el7.noarch.rpm: rabbitmq-server-3.7.4-1.el7.noarch
Marking rabbitmq-server-3.7.4-1.el7.noarch.rpm to be installed
Resolving Dependencies
--> Running transaction check
---> Package rabbitmq-server.noarch 0:3.7.4-1.el7 will be installed
--> Processing Dependency: erlang >= 19.3 for package: rabbitmq-server-3.7.4-1.el7.noarch
--> Processing Dependency: socat for package: rabbitmq-server-3.7.4-1.el7.noarch
--> Running transaction check
---> Package rabbitmq-server.noarch 0:3.7.4-1.el7 will be installed
--> Processing Dependency: erlang >= 19.3 for package: rabbitmq-server-3.7.4-1.el7.noarch
---> Package socat.x86_64 0:1.7.3.2-2.el7 will be installed
--> Finished Dependency Resolution
Error: Package: rabbitmq-server-3.7.4-1.el7.noarch (/rabbitmq-server-3.7.4-1.el7.noarch)
Requires: erlang >= 19.3
**********************************************************************
yum can be configured to try to resolve such errors by temporarily enabling
disabled repos and searching for missing dependencies.
To enable this functionality please set 'notify_only=0' in /etc/yum/pluginconf.d/search-disabled-repos.conf
**********************************************************************
Error: Package: rabbitmq-server-3.7.4-1.el7.noarch (/rabbitmq-server-3.7.4-1.el7.noarch)
Requires: erlang >= 19.3
You could try using --skip-broken to work around the problem
You could try running: rpm -Va --nofiles --nodigest
我自己发现了如何获得正确版本的 Erlang，以便 Rabbit MQ 将安装在我的 Red Hat 版本上。这就是我所做的：
In /etc/yum.repos.d我创建了一个rabbitmq-erlang.repo文件包含以下内容：
# In /etc/yum.repos.d/rabbitmq-erlang.repo
[rabbitmq-erlang]
name=rabbitmq-erlang
baseurl=https://dl.bintray.com/rabbitmq/rpm/erlang/19/el/7
gpgcheck=1
gpgkey=https://dl.bintray.com/rabbitmq/Keys/rabbitmq-release-signing-key.asc
repo_gpgcheck=0
enabled=1
然后我使用以下命令安装了 Rabbit MQ，它能够自动安装我需要的正确版本的 Erlang：
rpm --import https://dl.bintray.com/rabbitmq/Keys/rabbitmq-release-signing-key.asc
yum install rabbitmq-server-3.7.4-1.el7.noarch.rpm
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