在红帽错误的Erlang版本上安装RabbitMQ

Question

我试图按照RabbitMQ的说明在Red的评估VM (EnterpriseLinux764位工作站版本)上安装https://www.rabbitmq.com/install-rpm.html。

我已经从https://github.com/rabbitmq/erlang-rpm的源代码中安装了Erlang的零依赖版本。安装时没有出错，我将它的/bin目录添加到我的路径中。

然后，当我尝试使用RabbitMQ安装yum install rabbitmq-server-3.7.4-1.el7.noarch.rpm时，它失败了，并告诉我它需要Erlang版本>= 19.3，尽管我从源代码中安装了最新版本的Erlang (OTPv20.3)。下面是我尝试安装RabbitMQ时的全部输出：

$ 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

Answer 1

我自己找到了如何获得正确版本的Erlang，这样兔子MQ就可以安装在我的right版本上了。我所做的是：

在/etc/yum.repos.d中，我创建了一个具有以下内容的rabbitmq-erlang.repo文件：

# 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兔子MQ，它能够自动安装我需要的Erlang的正确版本：

rpm --import https://dl.bintray.com/rabbitmq/Keys/rabbitmq-release-signing-key.asc
yum install rabbitmq-server-3.7.4-1.el7.noarch.rpm