This guide covers RabbitMQ installation on RPM-based Linux (Red Hat Enterprise Linux, CentOS Stream, Fedora, openSUSE).
With the exception of Fedora, the versions included into standard RPM-based distribution repositories can be many releases behind latest RabbitMQ releases and may provide RabbitMQ versions that are already out of support.
Team RabbitMQ produces our own RPM packages and distributes them using a Cloudsmith mirror.
There are two ways of installing these RPMs:
Some of the topics covered in this guide are:
and more.
RabbitMQ is supported on several major RPM-based distributions that are still actively maintained by their primary vendor or developer group.
Note that modern versions of Erlang can have incompatibilities with older distributions (e.g. older than three to four years) or ship without much or any testing on older distributions or OS kernel versions.
Older distributions can also lack a recent enough version of OpenSSL. Erlang 24 cannot be used on distributions that do not provide OpenSSL 1.1 as a system library. CentOS 7 and Fedora releases older than 26 are examples of such distributions.
Currently the list of supported RPM-based distributions includes
The packages may work on other RPM-based distributions if dependencies are satisfied but their testing and support is done on a best effort basis.
RabbitMQ RPM package will require sudo privileges to install and manage. In environments where sudo isn't available, consider using the generic binary build.
Before installing RabbitMQ, you must install a supported version of Erlang/OTP. Standard Red Hat, Fedora, CentOS repositories provide Erlang versions that are typically out of date and cannot be used to run latest RabbitMQ releases.
There are three alternative sources for modern Erlang on RPM-based distributions:
Zero dependency Erlang RPM package for running RabbitMQ can be installed from a direct download from GitHub, as well as Yum repository, as described in its README.
As the name suggests, the package strips off some Erlang modules and dependencies that are not essential for running RabbitMQ.
openSUSE package repositories provide Erlang so it can be installed using Zypper:
sudo zypper in erlang
Erlang versions available in the standard repositories will in practice be behind the most recent version. To use the last version with the newest features, add the openSUSE Factory repositories for Erlang:
# add the openSUSE erlang factory, obs:// extracts the http url for the matching distro. sudo zypper ar -f obs://devel:languages:erlang:Factory openSUSE-Erlang-Factory # import the signing key and refresh the repository sudo zypper --gpg-auto-import-keys refresh # install a recent Erlang version sudo zypper in erlang
When installing with Yum, all dependencies other than Erlang/OTP should be resolved and installed automatically as long as compatible versions are available. When that's not the case, dependency packages must be installed manually.
However, when installing a local RPM file via yum dependencies must be installed manually. The dependencies are:
A Yum repository with RabbitMQ packages is available from Cloudsmith and a mirror of the repositories there.
The rest of this section will demonstrate how to set up a repository file that will use a mirror. Repositories on Cloudsmith are subject to traffic quotas but the mirror is not.
Yum will verify signatures of any packages it installs, therefore the first step in the process is to import the signing key
## primary RabbitMQ signing key rpm --import https://github.com/rabbitmq/signing-keys/releases/download/2.0/rabbitmq-release-signing-key.asc ## modern Erlang repository rpm --import 'https://dl.cloudsmith.io/public/rabbitmq/rabbitmq-erlang/gpg.E495BB49CC4BBE5B.key' ## RabbitMQ server repository rpm --import 'https://dl.cloudsmith.io/public/rabbitmq/rabbitmq-server/gpg.9F4587F226208342.key'
In order to use the Yum repository, a .repo file (e.g. rabbitmq.repo) has to be added under the /etc/yum.repos.d/ directory. The contents of the file will vary slightly between distributions (e.g. CentOS Stream 9, CentOS Stream 8, or OpenSUSE).
The following example sets up a repository that will install RabbitMQ and its Erlang dependency from a Cloudsmith mirror, and targets CentOS Stream 8. The same repository definition can be used by recent Fedora releases, and Amazon Linux 2023.
# In /etc/yum.repos.d/rabbitmq.repo ## ## Zero dependency Erlang RPM ## [modern-erlang] name=modern-erlang-el8 # uses a Cloudsmith mirror @ yum1.novemberain.com. # Unlike Cloudsmith, it does not have traffic quotas baseurl=https://yum1.novemberain.com/erlang/el/8/$basearch repo_gpgcheck=1 enabled=1 gpgkey=https://dl.cloudsmith.io/public/rabbitmq/rabbitmq-erlang/gpg.E495BB49CC4BBE5B.key gpgcheck=1 sslverify=1 sslcacert=/etc/pki/tls/certs/ca-bundle.crt metadata_expire=300 pkg_gpgcheck=1 autorefresh=1 type=rpm-md [modern-erlang-noarch] name=modern-erlang-el8-noarch # uses a Cloudsmith mirror @ yum1.novemberain.com. # Unlike Cloudsmith, it does not have traffic quotas baseurl=https://yum1.novemberain.com/erlang/el/8/noarch repo_gpgcheck=1 enabled=1 gpgkey=https://dl.cloudsmith.io/public/rabbitmq/rabbitmq-erlang/gpg.E495BB49CC4BBE5B.key https://github.com/rabbitmq/signing-keys/releases/download/2.0/rabbitmq-release-signing-key.asc gpgcheck=1 sslverify=1 sslcacert=/etc/pki/tls/certs/ca-bundle.crt metadata_expire=300 pkg_gpgcheck=1 autorefresh=1 type=rpm-md [modern-erlang-source] name=modern-erlang-el8-source # uses a Cloudsmith mirror @ yum1.novemberain.com. # Unlike Cloudsmith, it does not have traffic quotas baseurl=https://yum1.novemberain.com/erlang/el/8/SRPMS repo_gpgcheck=1 enabled=1 gpgkey=https://dl.cloudsmith.io/public/rabbitmq/rabbitmq-erlang/gpg.E495BB49CC4BBE5B.key https://github.com/rabbitmq/signing-keys/releases/download/2.0/rabbitmq-release-signing-key.asc gpgcheck=1 sslverify=1 sslcacert=/etc/pki/tls/certs/ca-bundle.crt metadata_expire=300 pkg_gpgcheck=1 autorefresh=1 ## ## RabbitMQ Server ## [rabbitmq-el8] name=rabbitmq-el8 baseurl=https://yum1.novemberain.com/rabbitmq/el/8/$basearch repo_gpgcheck=1 enabled=1 # Cloudsmith's repository key and RabbitMQ package signing key gpgkey=https://dl.cloudsmith.io/public/rabbitmq/rabbitmq-server/gpg.9F4587F226208342.key https://github.com/rabbitmq/signing-keys/releases/download/2.0/rabbitmq-release-signing-key.asc gpgcheck=1 sslverify=1 sslcacert=/etc/pki/tls/certs/ca-bundle.crt metadata_expire=300 pkg_gpgcheck=1 autorefresh=1 type=rpm-md [rabbitmq-el8-noarch] name=rabbitmq-el8-noarch baseurl=https://yum1.novemberain.com/rabbitmq/el/8/noarch repo_gpgcheck=1 enabled=1 # Cloudsmith's repository key and RabbitMQ package signing key gpgkey=https://dl.cloudsmith.io/public/rabbitmq/rabbitmq-server/gpg.9F4587F226208342.key https://github.com/rabbitmq/signing-keys/releases/download/2.0/rabbitmq-release-signing-key.asc gpgcheck=1 sslverify=1 sslcacert=/etc/pki/tls/certs/ca-bundle.crt metadata_expire=300 pkg_gpgcheck=1 autorefresh=1 type=rpm-md [rabbitmq-el8-source] name=rabbitmq-el8-source baseurl=https://yum1.novemberain.com/rabbitmq/el/8/SRPMS repo_gpgcheck=1 enabled=1 gpgkey=https://dl.cloudsmith.io/public/rabbitmq/rabbitmq-server/gpg.9F4587F226208342.key gpgcheck=0 sslverify=1 sslcacert=/etc/pki/tls/certs/ca-bundle.crt metadata_expire=300 pkg_gpgcheck=1 autorefresh=1 type=rpm-md
The following example sets up a repository that will install RabbitMQ and its Erlang dependency from a Cloudsmith mirror, and targets CentOS Stream 9, Amazon Linux 2023, and modern Fedora releases.
# In /etc/yum.repos.d/rabbitmq.repo ## ## Zero dependency Erlang RPM ## [modern-erlang] name=modern-erlang-el9 # uses a Cloudsmith mirror @ yum1.novemberain.com. # Unlike Cloudsmith, it does not have traffic quotas baseurl=https://yum1.novemberain.com/erlang/el/9/$basearch repo_gpgcheck=1 enabled=1 gpgkey=https://dl.cloudsmith.io/public/rabbitmq/rabbitmq-erlang/gpg.E495BB49CC4BBE5B.key gpgcheck=1 sslverify=1 sslcacert=/etc/pki/tls/certs/ca-bundle.crt metadata_expire=300 pkg_gpgcheck=1 autorefresh=1 type=rpm-md [modern-erlang-noarch] name=modern-erlang-el9-noarch # uses a Cloudsmith mirror @ yum1.novemberain.com. # Unlike Cloudsmith, it does not have traffic quotas baseurl=https://yum1.novemberain.com/erlang/el/9/noarch repo_gpgcheck=1 enabled=1 gpgkey=https://dl.cloudsmith.io/public/rabbitmq/rabbitmq-erlang/gpg.E495BB49CC4BBE5B.key https://github.com/rabbitmq/signing-keys/releases/download/2.0/rabbitmq-release-signing-key.asc gpgcheck=1 sslverify=1 sslcacert=/etc/pki/tls/certs/ca-bundle.crt metadata_expire=300 pkg_gpgcheck=1 autorefresh=1 type=rpm-md [modern-erlang-source] name=modern-erlang-el9-source # uses a Cloudsmith mirror @ yum1.novemberain.com. # Unlike Cloudsmith, it does not have traffic quotas baseurl=https://yum1.novemberain.com/erlang/el/9/SRPMS repo_gpgcheck=1 enabled=1 gpgkey=https://dl.cloudsmith.io/public/rabbitmq/rabbitmq-erlang/gpg.E495BB49CC4BBE5B.key https://github.com/rabbitmq/signing-keys/releases/download/2.0/rabbitmq-release-signing-key.asc gpgcheck=1 sslverify=1 sslcacert=/etc/pki/tls/certs/ca-bundle.crt metadata_expire=300 pkg_gpgcheck=1 autorefresh=1 ## ## RabbitMQ Server ## [rabbitmq-el9] name=rabbitmq-el9 baseurl=https://yum1.novemberain.com/rabbitmq/el/9/$basearch repo_gpgcheck=1 enabled=1 # Cloudsmith's repository key and RabbitMQ package signing key gpgkey=https://dl.cloudsmith.io/public/rabbitmq/rabbitmq-server/gpg.9F4587F226208342.key https://github.com/rabbitmq/signing-keys/releases/download/2.0/rabbitmq-release-signing-key.asc gpgcheck=1 sslverify=1 sslcacert=/etc/pki/tls/certs/ca-bundle.crt metadata_expire=300 pkg_gpgcheck=1 autorefresh=1 type=rpm-md [rabbitmq-el9-noarch] name=rabbitmq-el9-noarch baseurl=https://yum1.novemberain.com/rabbitmq/el/9/noarch repo_gpgcheck=1 enabled=1 # Cloudsmith's repository key and RabbitMQ package signing key gpgkey=https://dl.cloudsmith.io/public/rabbitmq/rabbitmq-server/gpg.9F4587F226208342.key https://github.com/rabbitmq/signing-keys/releases/download/2.0/rabbitmq-release-signing-key.asc gpgcheck=1 sslverify=1 sslcacert=/etc/pki/tls/certs/ca-bundle.crt metadata_expire=300 pkg_gpgcheck=1 autorefresh=1 type=rpm-md [rabbitmq-el9-source] name=rabbitmq-el9-source baseurl=https://yum1.novemberain.com/rabbitmq/el/9/SRPMS repo_gpgcheck=1 enabled=1 gpgkey=https://dl.cloudsmith.io/public/rabbitmq/rabbitmq-server/gpg.9F4587F226208342.key gpgcheck=0 sslverify=1 sslcacert=/etc/pki/tls/certs/ca-bundle.crt metadata_expire=300 pkg_gpgcheck=1 autorefresh=1 type=rpm-md
The following example targets OpenSUSE and only installs the RabbitMQ package repository. Erlang is assumed to be provisioned from the devel:languages:erlang:Factory repository.
## ## RabbitMQ server ## [rabbitmq_server] name=rabbitmq_server baseurl=https://dl.cloudsmith.io/public/rabbitmq/rabbitmq-server/rpm/opensuse/15.1/$basearch repo_gpgcheck=1 enabled=1 gpgkey=https://dl.cloudsmith.io/public/rabbitmq/rabbitmq-server/gpg.9F4587F226208342.key gpgcheck=1 sslverify=1 sslcacert=/etc/pki/tls/certs/ca-bundle.crt metadata_expire=300 pkg_gpgcheck=1 autorefresh=1 type=rpm-md [rabbitmq_server-noarch] name=rabbitmq_server-noarch baseurl=https://dl.cloudsmith.io/public/rabbitmq/rabbitmq-server/rpm/opensuse/15.1/noarch repo_gpgcheck=1 enabled=1 gpgkey=https://dl.cloudsmith.io/public/rabbitmq/rabbitmq-server/gpg.9F4587F226208342.key gpgcheck=1 sslverify=1 sslcacert=/etc/pki/tls/certs/ca-bundle.crt metadata_expire=300 pkg_gpgcheck=1 autorefresh=1 type=rpm-md [rabbitmq_server-source] name=rabbitmq_server-source baseurl=https://dl.cloudsmith.io/public/rabbitmq/rabbitmq-server/rpm/opensuse/15.1/SRPMS repo_gpgcheck=1 enabled=1 gpgkey=https://dl.cloudsmith.io/public/rabbitmq/rabbitmq-server/gpg.9F4587F226208342.key gpgcheck=1 sslverify=1 sslcacert=/etc/pki/tls/certs/ca-bundle.crt metadata_expire=300 pkg_gpgcheck=1 autorefresh=1 type=rpm-md
Update package metadata:
dnf update -y
Next install dependencies from the standard repositories:
## install these dependencies from standard OS repositories dnf install socat logrotate -y
Finally, install modern Erlang and RabbitMQ:
## install RabbitMQ and zero dependency Erlang from the above repositories, ## ignoring any versions provided by the standard repositories ## ## This installs Erlang 25.3.x because there is no Erlang 26-compatible ## GA release of RabbitMQ at the moment dnf install -y erlang-25.3.2 rabbitmq-server
First, update Zypper package metadata:
## refresh the RabbitMQ repositories zypper --gpg-auto-import-keys refresh rabbitmq_server zypper --gpg-auto-import-keys refresh rabbitmq_server-noarch zypper --gpg-auto-import-keys refresh rabbitmq_server-source
Then install the packages:
## install the package from Cloudsmith repository zypper install --repo rabbitmq_server-noarch
yum version locking plugin can be used to prevent unexpected package upgrades. Using it carries the risk of leaving the system behind in terms of updates, including important bug fixes and security patches.
After downloading the server package, issue the following command as 'root':
rpm --import https://github.com/rabbitmq/signing-keys/releases/download/2.0/rabbitmq-release-signing-key.asc ## install these dependencies from standard OS repositories dnf install socat logrotate -y # This example assumes the CentOS Stream 8 version of the package, suitable for # Red Hat 8, CentOS Stream 9, CentOS Stream 8 and modern Fedora releases. dnf install rabbitmq-server-3.11.17-1.el8.noarch.rpm
RabbitMQ public signing key can also be downloaded from rabbitmq.com:
rpm --import https://www.rabbitmq.com/rabbitmq-release-signing-key.asc ## install these dependencies from standard OS repositories dnf install socat logrotate -y # This example assumes the CentOS 8 version of the package, suitable for # Red Hat 8, CentOS Stream 9, CentOS Stream 8 and modern Fedora releases. dnf install rabbitmq-server-3.11.17-1.el8.noarch.rpm
In some cases it may be easier to download the package and install it manually. The package can be downloaded from GitHub.
Description | Download | Signature |
---|---|---|
RPM for RHEL Linux 8.x and 9.x, CentOS Stream 8 and 9, Fedora 34+, Amazon Linux 2023, Rocky Linux, Alma Linux | rabbitmq-server-3.11.17-1.el8.noarch.rpm | Signature |
RPM for openSUSE Linux | rabbitmq-server-3.11.17-1.suse.noarch.rpm | Signature |
The server is not started as a daemon by default when the RabbitMQ server package is installed. To start the daemon by default when the system boots, as an administrator run
chkconfig rabbitmq-server on
As an administrator, start and stop the server as usual, e.g. using service:
/sbin/service rabbitmq-server start /sbin/service rabbitmq-server status /sbin/service rabbitmq-server stop
If the service tool is not installed on the system, it can be installed using yum:
yum -y install initscripts
On most systems, a node should be able to start and run with all defaults. Please refer to the Configuration guide to learn more and Production Checklist for guidelines beyond development environments.
Note: the node is set up to run as system user rabbitmq. If location of the node database or the logs is changed, the files and directories must be owned by this user.
RabbitMQ nodes bind to ports (open server TCP sockets) in order to accept client and CLI tool connections. Other processes and tools such as SELinux may prevent RabbitMQ from binding to a port. When that happens, the node will fail to start. Refer to the Networking Guide for more details.
The broker creates a user guest with password guest. Unconfigured clients will in general use these credentials. By default, these credentials can only be used when connecting to the broker as localhost so you will need to take action before connecting from any other machine.
See the documentation on access control for information on how to create more users and delete the guest user.
RabbitMQ installations running production workloads may need system limits and kernel parameters tuning in order to handle a decent number of concurrent connections and queues. The main setting that needs adjustment is the max number of open files, also known as ulimit -n. The default value on many operating systems is too low for a messaging broker (1024 on several Linux distributions). We recommend allowing for at least 65536 file descriptors for user rabbitmq in production environments. 4096 should be sufficient for many development workloads.
There are two limits in play: the maximum number of open files the OS kernel allows (fs.file-max) and the per-user limit (ulimit -n). The former must be higher than the latter.
On distributions that use systemd, the OS limits are controlled via a configuration file at /etc/systemd/system/rabbitmq-server.service.d/limits.conf. For example, to set the max open file handle limit (nofile) to 64000:
[Service] LimitNOFILE=64000
See systemd documentation to learn about the supported limits and other directives.
To configure kernel limits for Docker contains, use the "default-ulimits" key in Docker daemon configuration file. The file has to be installed on Docker hosts at /etc/docker/daemon.json:
{ "default-ulimits": { "nofile": { "Name": "nofile", "Hard": 64000, "Soft": 64000 } } }
The most straightforward way to adjust the per-user limit for RabbitMQ on distributions that do not use systemd is to edit the /etc/default/rabbitmq-server (provided by the RabbitMQ Debian package) or rabbitmq-env.conf to invoke ulimit before the service is started.
ulimit -S -n 64000
This soft limit cannot go higher than the hard limit (which defaults to 4096 in many distributions). The hard limit can be increased via /etc/security/limits.conf. This also requires enabling the pam_limits.so module and re-login or reboot. Note that limits cannot be changed for running OS processes.
For more information about controlling fs.file-max with sysctl, please refer to the excellent Riak guide on open file limit tuning.
RabbitMQ management UI displays the number of file descriptors available for it to use on the Overview tab.
rabbitmq-diagnostics status
includes the same value.
The following command
cat /proc/$RABBITMQ_BEAM_PROCESS_PID/limits
can be used to display effective limits of a running process. $RABBITMQ_BEAM_PROCESS_PID is the OS PID of the Erlang VM running RabbitMQ, as returned by rabbitmq-diagnostics status.
Configuration management tools (e.g. Chef, Puppet, BOSH) provide assistance with system limit tuning. Our developer tools guide lists relevant modules and projects.
To start and stop the server, use the service tool. The service name is rabbitmq-server:
# stop the local node sudo service rabbitmq-server stop # start it back sudo service rabbitmq-server start
service rabbitmq-server status will report service status as observed by systemd (or similar service manager):
# check on service status as observed by service manager sudo service rabbitmq-server status
It will produce output similar to this:
Redirecting to /bin/systemctl status rabbitmq-server.service ● rabbitmq-server.service - RabbitMQ broker Loaded: loaded (/usr/lib/systemd/system/rabbitmq-server.service; enabled; vendor preset: disabled) Drop-In: /etc/systemd/system/rabbitmq-server.service.d └─limits.conf Active: active (running) since Wed 2021-05-22 10:21:32 UTC; 25s ago Main PID: 957 (beam.smp) Status: "Initialized" CGroup: /system.slice/rabbitmq-server.service ├─ 957 /usr/lib/erlang/erts-10.2/bin/beam.smp -W w -A 64 -MBas ageffcbf -MHas ageffcbf -MBlmbcs 512 -MHlmbcs 512 -MMmcs 30 -P 1048576 -t 5000000 -stbt db -zdbbl 128000 -K true -- -root /usr/lib/erlang -progname erl -- -home /var/lib/rabbitmq -- ... ├─1411 /usr/lib/erlang/erts-10.2/bin/epmd -daemon ├─1605 erl_child_setup 400000 ├─2860 inet_gethost 4 └─2861 inet_gethost 4 Dec 26 10:21:30 localhost.localdomain rabbitmq-server[957]: ## ## Dec 26 10:21:30 localhost.localdomain rabbitmq-server[957]: ## ## RabbitMQ 3.11.5. Copyright (c) 2007-2023 VMware, Inc. or its affiliates. Dec 26 10:21:30 localhost.localdomain rabbitmq-server[957]: ########## Licensed under the MPL 2.0. Website: https://www.rabbitmq.com/ Dec 26 10:21:30 localhost.localdomain rabbitmq-server[957]: ###### ## Dec 26 10:21:30 localhost.localdomain rabbitmq-server[957]: ########## Logs: /var/log/rabbitmq/rabbit@localhost.log Dec 26 10:21:30 localhost.localdomain rabbitmq-server[957]: /var/log/rabbitmq/rabbit@localhost_upgrade.log Dec 26 10:21:30 localhost.localdomain rabbitmq-server[957]: Starting broker... Dec 26 10:21:32 localhost.localdomain rabbitmq-server[957]: systemd unit for activation check: "rabbitmq-server.service" Dec 26 10:21:32 localhost.localdomain systemd[1]: Started RabbitMQ broker. Dec 26 10:21:32 localhost.localdomain rabbitmq-server[957]: completed with 6 plugins.
rabbitmqctl, rabbitmq-diagnostics, and other CLI tools will be available in PATH and can be invoked by a sudo-enabled user:
# checks if the local node is running and CLI tools can successfully authenticate with it sudo rabbitmq-diagnostics ping # prints enabled components (applications), TCP listeners, memory usage breakdown, alarms # and so on sudo rabbitmq-diagnostics status # prints cluster membership information sudo rabbitmq-diagnostics cluster_status # prints effective node configuration sudo rabbitmq-diagnostics environment
All rabbitmqctl commands will report an error if no node is running. See the CLI tools and Monitoring guides to learn more.
Server logs can be found under the configurable directory, which usually defaults to /var/log/rabbitmq when RabbitMQ is installed via a Linux package manager.
RABBITMQ_LOG_BASE can be used to override log directory location.
Assuming a systemd-based distribution, system service logs can be inspected using
journalctl --system
which requires superuser privileges. Its output can be filtered to narrow it down to RabbitMQ-specific entries:
sudo journalctl --system | grep rabbitmq
The output will look similar to this:
Dec 26 11:03:04 localhost rabbitmq-server[968]: ## ## Dec 26 11:03:04 localhost rabbitmq-server[968]: ## ## RabbitMQ 3.11.5. Copyright (c) 2007-2023 VMware, Inc. or its affiliates. Dec 26 11:03:04 localhost rabbitmq-server[968]: ########## Licensed under the MPL 2.0. Website: https://www.rabbitmq.com/ Dec 26 11:03:04 localhost rabbitmq-server[968]: ###### ## Dec 26 11:03:04 localhost rabbitmq-server[968]: ########## Logs: /var/log/rabbitmq/rabbit@localhost.log Dec 26 11:03:04 localhost rabbitmq-server[968]: /var/log/rabbitmq/rabbit@localhost_upgrade.log Dec 26 11:03:04 localhost rabbitmq-server[968]: Starting broker... Dec 26 11:03:05 localhost rabbitmq-server[968]: systemd unit for activation check: "rabbitmq-server.service" Dec 26 11:03:06 localhost rabbitmq-server[968]: completed with 6 plugins.
The broker always appends to the log files, so a complete log history is retained.
logrotate is the recommended way of log file rotation and compression. By default, the package will set up logrotate to run weekly on files located in default /var/log/rabbitmq directory. Rotation configuration can be found in /etc/logrotate.d/rabbitmq-server.
If you have questions about the contents of this guide or any other topic related to RabbitMQ, don't hesitate to ask them on the RabbitMQ mailing list.
If you'd like to contribute an improvement to the site, its source is available on GitHub. Simply fork the repository and submit a pull request. Thank you!