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Installing MusicBrainz Server

The easiest method of installing a local MusicBrainz Server may be to use the MusicBrainz Docker Compose project, which can be used for a website/web service mirror, testing, or development. In case you only need a replicated database, you should consider using mbdata.

If you want to manually set up MusicBrainz Server from source, read on!

Prerequisites

  1. A Unix based operating system

    The MusicBrainz development team uses a variety of Linux distributions, but Mac OS X will work just fine, if you're prepared to potentially jump through some hoops. If you are running Windows we recommend you set up a Ubuntu virtual machine.

    This document will assume you are using Ubuntu (at least 14.04) for its instructions.

  2. Perl (at least version 5.38)

    Perl comes bundled with most Linux operating systems, you can check your installed version of Perl with:

    perl -v

  3. PostgreSQL (at least version 12)

    PostgreSQL version 12 or higher is required, along with its development libraries. To install using packages, run the following:

    POSTGRES_VERSION=12 \
sudo apt-get install \
    postgresql-${POSTGRES_VERSION} \
    postgresql-contrib-${POSTGRES_VERSION} \
    postgresql-server-dev-${POSTGRES_VERSION}

    If needed, packages of all supported PostgreSQL versions for various Ubuntu releases are available from the PostgreSQL apt repository.

    Alternatively, you may compile PostgreSQL from source, but then make sure to also compile the cube and earthdistance extensions found in the contrib directory. The database import script will take care of installing those extensions into the database when it creates the database for you.

  4. Git

    The MusicBrainz development team uses Git for their DVCS. To install Git, run the following:

    sudo apt-get install git

  5. Redis

    Sessions and cached entities are stored in Redis, so a running Redis server is required. Redis can be installed with the following command and will not need any further configuration:

    sudo apt-get install redis-server

    The databases and key prefix used by musicbrainz can be configured in lib/DBDefs.pm. The defaults should be fine if you don't use your redis install for anything else.

  6. Node.js (at least version 20.9.0) and Yarn

    Node.js is required to build (and optionally minify) our JavaScript and CSS. If you plan on accessing musicbrainz-server inside a web browser, you should install Node and the package manager Yarn.

    We currently run Node.js v20 LTS in production. (The first LTS release of v20 was v20.9.0.) If your release of Ubuntu doesn't have such a version of Node.js in its repositories, we can recommended the NodeSource binary distributions, which we also use in production:

    https://github.com/nodesource/distributions#installation-instructions

    To install Node.js from either the Ubuntu or NodeSource repositories, run:

    sudo apt-get install nodejs

    Depending on your Ubuntu version, another package might be required, too:

    sudo apt-get install nodejs-legacy

    This is only needed where it exists, so a warning about the package not being found is not a problem.

    Next you need a modern version of Yarn to install the JS dependencies. Yarn can be installed using the corepack command, which is bundled with Node.js. By default, corepack will install yarn to /usr/local/bin, so sudo may be required. Alternatively, you can specify where to install yarn via the --install-directory flag. The specified directory should be in your $PATH.

    Note that if you have Yarn 1 (Classic) installed on your system via npm or apt, this may override it depending on the installation directory. If Yarn 1 (Classic) isn't required by any other project on your system, this likely won't cause any issues, but in that case it's recommended to uninstall it first.

    # installs yarn to /usr/local/bin
sudo corepack enable

# alternate example: installs yarn to ~/bin without sudo
corepack enable --install-directory=~/bin

  7. Standard Development Tools

    In order to install some of the required Perl and Postgresql modules, you'll need a C compiler and make. You can install a basic set of development tools with the command:

    sudo apt-get install build-essential

  8. Script dependencies

    In order to run one-off scripts, you’ll need the ts command which is provided by the moreutils package. If needed, you can install it with the command:

    sudo apt-get install moreutils

Server configuration

  1. Download the source code.

    git clone --recursive git://github.com/metabrainz/musicbrainz-server.git
cd musicbrainz-server

  2. Modify the server configuration file.

    cp lib/DBDefs.pm.sample lib/DBDefs.pm

    Fill in the appropriate value (according to comments) for WEB_SERVER. If you are using a reverse proxy, you should set the environment variable MUSICBRAINZ_USE_PROXY=1 when starting the server. This makes the server aware of it when checking for the canonical uri.

    Determine what type of server this will be and set REPLICATION_TYPE accordingly:

    1. RT_MIRROR (mirror server)

      A mirror server will always be in sync with the master database at https://musicbrainz.org/ by way of an hourly replication packet. Mirror servers do not allow any local editing. After the initial data import, the only changes allowed will be to load the next replication packet in turn.

      Mirror servers will have their WikiDocs automatically kept up to date.

      If you are not setting up a mirror server for development purposes, make sure to set DB_STAGING_SERVER to 0.

      If you're setting up a mirror server, make sure you have something set up for the READONLY database setting in lib/DBDefs.pm; it can just be a copy of what's in READWRITE if you don't need anything fancy.

    2. RT_STANDALONE (for development)

      A stand alone server is recommended if you are setting up a server for development purposes. They do not accept the replication packets and will require manually importing a new database dump in order to bring it up to date with the master database. Local editing is available, but keep in mind that none of your changes will be pushed up to https://musicbrainz.org/.

    3. RT_MASTER

      Almost certainly not what you want, this is what the main musicbrainz.org site runs on. It's different from standalone in that it's able to produce replication packets to be applied on mirrors. For more details, see INSTALL-MASTER.md

    The server type cannot easily be changed after data import.

Installing Perl dependencies

The fundamental thing that needs to happen here is all the dependency Perl modules get installed, somewhere where your server can find them. There are many ways to make this happen, and the best choice will be very site-dependent. MusicBrainz recommends the use of local::lib, which will install Perl libraries into your home directory, and does not require root permissions and avoids modifying the rest of your system.

Below outlines how to setup MusicBrainz server with local::lib.

  1. Prerequisites

    Before you get started you will actually need to have local::lib installed. There are also a few development headers that will be needed when installing dependencies. Run the following steps as a normal user on your system.

    sudo apt-get install \
    libdb-dev \
    libexpat1-dev \
    libicu-dev \
    liblocal-lib-perl \
    libpq-dev \
    libxml2 \
    libxml2-dev \
    cpanminus \
    pkg-config

  2. Enable local::lib

    local::lib requires a few environment variables are set. The easiest way to do this is via .bashrc, assuming you use bash as your shell. Simply run the following to append local::lib configuration to your bash configuration:

    echo 'eval $( perl -Mlocal::lib )' >> ~/.bashrc

    Next, to reload your configuration, either close and open your shell again, or run:

    source ~/.bashrc

  3. Install dependencies

    To install the dependencies for MusicBrainz Server, make sure you are in the MusicBrainz source code directory and run the following:

    cpanm --installdeps --notest .

    (Do not overlook the dot at the end of that command.)

Building static web resources

To build everything necessary to access the server in a web browser (CSS, JavaScript), run the following command:

./script/compile_resources.sh

If you encounter an error running the command above, follow this section Translations until 4. install translations. It will generate the necessary files for the build to succeed.

This command below takes care of installing Node.js dependencies for you, including development dependencies. If you're just setting up a mirror and don't plan to hack on any code, you can save a bit of time and space by excluding the devDependencies (listed in package.json):

NODE_ENV=production ./script/compile_resources.sh

Creating the database

  1. Setup PostgreSQL authentication

    For normal operation, the server only needs to connect from one or two OS users (whoever your web server/crontabs run as), to one database (the MusicBrainz Database), as one PostgreSQL user. The PostgreSQL database name and user name are given in DBDefs.pm (look for the READWRITE key).

    For example, if you run your web server and crontabs as "www-user" and you have kept the default PostgreSQL user name ("musicbrainz"), you could set up that user by changing your PostgreSQL configuration (the location of the PostegreSQL config varies depending on your operating ystem; in Ubuntu it's usually /etc/postgresql/{version}/main/):

    1. Add this line in pg_hba.conf (Note: The order of the columns is important!):

      local    musicbrainz_db    musicbrainz    ident    map=mb_map

    2. Add this line in pg_ident.conf:

      mb_map    www-user    musicbrainz

    Alternatively, if you are running a server for development purposes and don't require any special access permissions, only adding this line in pg_hba.conf will suffice (make sure to insert it before any other permissions):

    local   all    all    trust

    Note that a running PostgreSQL will pick up changes to configuration files only when being told so via a HUP signal (or by using pg_ctlcluster, specifying reload as action). Alternatively, in Ubuntu you can restart PostgreSQL by using:

    sudo /etc/init.d/postgresql restart

    You do not need to create the PostgreSQL user ("musicbrainz", or whatever name you configured in DBDefs.pm) yourself; the next step will do so (using the password from DBDefs.pm) if it does not exist yet.

  2. Create the database

    You have three options when it comes to the database. You can opt for a clean database with just the schema, a sample of database content (useful for developers with limited disk space), or you can import a full database dump.

    1. Use a clean database

      To use a clean database, all you need to do is run:

      ./admin/InitDb.pl --createdb --clean

    2. Import a database dump

      Our database dumps are provided twice a week and can be downloaded from from a variety of locations. That page also describes the contents of the various dump files.

      To get going, you need at least the mbdump.tar.bz2, mbdump-editor.tar.bz2 and mbdump-derived.tar.bz2 archives, but you can grab whichever dumps suit your needs.

      Assuming the dumps have been downloaded to /tmp/dumps/ you can verify that the data is correct by running:

      pushd /tmp/dumps/ && md5sum -c MD5SUMS && popd

      You can also verify that the data dumps were indeed created by MusicBrainz verifying them against our GPG signing key:

      gpg --recv-keys C777580F
gpg --verify-files /tmp/dumps/*.asc

      Before you can actually import the dumps, make sure that bzip2 is installed:

      apt-get install bzip2

      If the GPG signing key is OK and you wish to continue, you can import them with:

      ./admin/InitDb.pl --createdb --import /tmp/dumps/mbdump*.tar.bz2 --echo

      --echo just gives us a bit more feedback in case this goes wrong, you may leave it off. Remember to change the paths to your mbdump*.tar.bz2 files, if they are not in /tmp/dumps/.

      By default, the archives will be extracted into the /tmp directory as an intermediate step. You may specify a different location with the --tmp-dir option.

    3. Import a database sample

      If a full dump is too large for your purposes, but you would like to have some real data to test with for development, you can download our database sample, published once a month. This can be found at the same places the full dump is found (see above), but using sample instead of fullexport in the URL. For example: http://ftp.musicbrainz.org/pub/musicbrainz/data/sample/.

      You can import this sample dump in the same way as the full dump above.

    4. Build materialized tables (optional but recommended)

      MusicBrainz Server makes use of materialized (or denormalized) tables in production to improve the performance of certain pages and features. These tables duplicate primary table data and can take up several additional gigabytes of space, so they're optional but recommended. If you don't populate these tables, we'll generally fall back to slower queries in their place.

      In order to build them initially, run the following script:

      ./admin/BuildMaterializedTables --database=MAINTENANCE all

      Once this is done, the tables will be kept up-to-date automatically via triggers. (This is true even on replicated mirrors. Generally, triggers are not created on mirrors, but since these materialized tables aren't replicated, we install a set of mirror-only triggers to manage them.)

    If this process gets interrupted or fails, you will need to manually drop the musicbrainz_db database in order to be able to run ./admin/InitDb.pl --createdb again.

    MusicBrainz Server doesn't enforce any statement timeouts on any SQL it runs. If this is an issue in your setup, you may want to set a timeout at the database level:

    ALTER DATABASE musicbrainz_db SET statement_timeout TO 60000;

Starting the server

You should now have everything ready to run the development server!

The development server is a lightweight HTTP server that gives good debug output and is much more convenient than having to set up a standalone server. Just run:

plackup -Ilib -r

Visiting http://your.machines.ip.address:5000/ should now present you with your own running instance of the MusicBrainz Server.

If you'd like a more permanent setup, the plackup documentation may prove useful in setting up a server such as nginx, using FastCGI.

Rate limiting

The server by itself doesn't rate limit any request it handles. If you're receiving 503s, then you're likely performing search queries without having set up a local instance of the search server along with the search index rebuilder. By default, search queries are sent to search.musicbrainz.org and are rate limited.

Once you set up your own instance, change SEARCH_SERVER in lib/DBDefs.pm to point to it.

Translations

If you intend to run a server with translations, there are a few steps to follow:

  1. Prerequisites

    Make sure gettext is installed (you need msgmerge and msgfmt, at least):

    sudo apt-get install gettext

    This will enable you to compile and install the translations that are in the source repository.

    If you want to work on translations yourself, you will need to create a MetaBrainz Weblate account.

    More information on how to get started with translations and beyond is available at MusicBrainz Server internationalization.

  2. Change to the po directory

    cd po/

  3. Optionally, get the latest “bleeding edge” translations

    Weblate is configured to follow the *.pot files from the branch beta and to push its updated *.po files to to the branch translations. Branches are regularly merged into each other, so translations will be from the latest production release at least if not more recent.

    If you absolutely want the latest “bleeding edge” translations, then either switch to the branch translations or merge it to your own branch.

    The .po files for all language(s) open to translation are in the po/ folder with filenames ending with ISO language code, optionally followed by an underscore and an ISO country code (such as fr for French, fr_CA for Canadian French).

  4. Install translations

    make install

    This will compile and install the files to lib/LocaleData/{language}/LC_MESSAGES/{domain}.mo.

  5. Add the languages to MB_LANGUAGES in DBDefs.pm. These should be formatted {lang}-{country}, such as 'es', or 'fr-ca', in a space-separated list.

  6. Ensure you have a system locale for any languages you want to use. For many languages, this will suffice:

    sudo apt-get install language-pack-{language code}

Server maintenance

For maintenance operations that may be necessary over time while running MusicBrainz Server, see [MAINTENANCE.md].

Troubleshooting

If you have any difficulties, feel free to ask in #metabrainz on irc.libera.chat, or ask on our forums.

Please report any issues on our bug tracker.

Good luck, and happy hacking!