问题
I'm trying to install RabbitMQ on an evaluation VM of Red Hat (Enterprise Linux 7 64-bit workstation version) following the instructions at https://www.rabbitmq.com/install-rpm.html.
I've gone and installed the zero-dependency version of Erlang from the source at https://github.com/rabbitmq/erlang-rpm. That installed without error and I added its /bin directory to my path.
When I then try to install RabbitMQ using yum install rabbitmq-server-3.7.4-1.el7.noarch.rpm, it fails and tells me it needs Erlang version >= 19.3, even though I installed the latest version of Erlang at the time (OTP v20.3) from the source. Below is the full output from when I try to install RabbitMQ:
$ 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
回答1:
I found out on my own how to get the right version of Erlang so that Rabbit MQ will install on my version of Red Hat. Here's what I did:
In /etc/yum.repos.d I created a rabbitmq-erlang.repo file with the following contents:
# 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
Then I installed Rabbit MQ using the following commands, and it was able to automagically install the right version of Erlang I needed:
rpm --import https://dl.bintray.com/rabbitmq/Keys/rabbitmq-release-signing-key.asc
yum install rabbitmq-server-3.7.4-1.el7.noarch.rpm
来源：https://stackoverflow.com/questions/49562295/installing-rabbitmq-on-red-hat-wrong-erlang-version