Install from Repository (Red Hat Enterprise Linux, CentOS Stream, …

This guide is based on an RPM software repository available for Red Hat based Linux distributions provided by Osnabrück University. This repository provides preconfigured Opencast installations and all necessary 3rd-party-tools.

In addition to this guide, we have also recorded a full installation done in 30 minutes if you like to see how this works before you try it yourself.

Currently Supported

We frequently test on CentOS Stream 8/9 and infrequently test on Red Hat Enterprise Linux 8/9, trying to ensure that installations on those systems work without problems. Since Rocky Linux and AlmaLinux OS are intended to be fully compatible to RHEL, those distributions should work as well. But we don't test against those.

We support only the x86_64 architecture.

Activate Repository

First you have to install the necessary repositories:

dnf install -y "https://pkg.opencast.org/rpms/release/el/$(rpm -E %rhel)/oc-17/noarch/opencast-repository-17-1.el$(rpm -E %rhel).noarch.rpm"

It might take some time after the release of a new Opencast version before the RPMs are moved to the stable repository. Until then, you can use /etc/yum.repos.d/opencast-testing.repo instead to get the latest version. Note that the testing repository is an additional repository and still requires the stable repository to be active.

You can check if the repositories were successfully enabled using:

dnf repolist enabled
  epel
  epel-modular
  opencast
  opencast-noarch
  opencast-testing
  opencast-testing-noarch

Install Opencast

For a basic all-in-one installation just run:

dnf install opencast-allinone

This will install the default distribution of Opencast and all its dependencies. For more options, see the advanced installation section below.

Install Elasticsearch

Opencast uses Elasticsearch as a search index and a cache for quick access to some data from user interfaces. Make sure to install it on the node which also serves the admin interface.

dnf install elasticsearch-oss

Furthermore, the analysis-icu plugin for Elasticsearch is required to install. It is necessary for sorting naturally. To install the ICU plugin, run the following:

bin/elasticsearch-plugin install analysis-icu

Opencast automatically configures the search index once it is connected. The default configuration will work for a local Elasticsearch with no modifications. The only exception for this is to add a configuration to mitigate Log4Shell. For this, add a file /etc/elasticsearch/jvm.options.d/log4shell.options with the content:

-Dlog4j2.formatMsgNoLookups=true

Finally, make sure to start and enable the service:

systemctl start elasticsearch
systemctl enable elasticsearch

Configuration

Make sure to set your hostname, login information and other configuration details by following the

Start Opencast

Finally, start and enable Opencast by running:

systemctl start opencast.service
systemctl enable opencast.service

Advanced Installation

The basic installation will give you an all-in-one Opencast distribution on a single server. For production, most users prefer deploying Opencast as a cluster, which allows for a better workload distribution. You can list all available Opencast packages/distributions with:

dnf search opencast

This will list all available Opencast distributions in the form opencast-<dist-type>. Some commonly used distributions are:

Upgrading

Packages will automatically upgrade to the latest minor version in a release series when running dnf update. They do not automatically upgrade the latest major version. This is intentional since additional migration steps might be required. For example, if you install Opencast 17.1, you get the latest 17.x release, but no 18.x release.

These instructions will upgrade Opencast to a new version which may be incompatible with older versions. Thus, a rollback might not be possible. If you are performing this on a production system, please ensure you have valid backups prior to taking the next steps.

For an RPM-based upgrade, first, stop Opencast:

systemctl stop opencast.service

Then, update the repository:

dnf install -y \
  "https://pkg.opencast.org/rpms/release/el/$(rpm -E %rhel)/oc-17/noarch/opencast-repository-17-1.el$(rpm -E %rhel).noarch.rpm"

Upgrade to the new Opencast package by running:

dnf update

At this point you must follow the relevant upgrade instructions, prior to starting Opencast again.

Uninstall Opencast

To uninstall Opencast, you can run:

dnf remove opencast

This will not touch your created media files or modified configuration files. If you want to remove them as well, you have to do that by yourself.

# Remove media files (default location)
rm -rf /srv/opencast

# Remove local db, search indexes and working files
rm -rf /var/lib/opencast

# Remove configuration files
rm -rf /etc/opencast

# Remove logs
rm -rf /var/log/opencast