Installation instructions

Looking for quick installation instructions? See Quick setup guide.

Hardware requirements

Weblate should run on all contemporary hardware without problems, the following is the minimal configuration required to run Weblate on a single host (Weblate, database and web server):

  • 2 GB of RAM
  • 2 CPU cores
  • 1 GB of storage space

The more memory you have, the better - it is used for caching on all levels (filesystem, database and Weblate).

Many concurrent users increases the amount of needed CPU cores. For hundreds of translation components at least 4 GB of RAM is recommended.

Note

Actual requirements for your installation of Weblate vary heavily based on the size of the translations managed in it.

Software requirements

Python dependencies

Weblate is written in Python and supports Python 2.7, 3.4 or newer. The following dependencies can be installed using pip or from your distribution packages:

Django (>= 1.11)
https://www.djangoproject.com/
Celery (>= 4.0)
http://www.celeryproject.org/
celery-batches (>= 0.2)
https://pypi.org/project/celery-batches/
siphashc (>= 0.8)
https://github.com/WeblateOrg/siphashc
translate-toolkit (>= 2.3.1)
https://toolkit.translatehouse.org/
Six (>= 1.7.0)
https://pypi.org/project/six/
filelock (>= 3.0.1)
https://github.com/benediktschmitt/py-filelock
Mercurial (>= 2.8) (optional for Mercurial repositories support)
https://www.mercurial-scm.org/
social-auth-core (>= 1.3.0)
https://python-social-auth.readthedocs.io/
social-auth-app-django (>= 2.0.0)
https://python-social-auth.readthedocs.io/
django-appconf (>= 1.0)
https://github.com/django-compressor/django-appconf
Whoosh (>= 2.7.0)
https://bitbucket.org/mchaput/whoosh/wiki/Home
PIL or Pillow library
https://python-pillow.org/
lxml (>= 3.1.0)
https://lxml.de/
defusedxml (>= 0.4)
https://bitbucket.org/tiran/defusedxml
dateutil
https://labix.org/python-dateutil
django_compressor (>= 2.1.1)
https://github.com/django-compressor/django-compressor
django-crispy-forms (>= 1.6.1)
https://django-crispy-forms.readthedocs.io/
Django REST Framework (>=3.8)
https://www.django-rest-framework.org/
user-agents (>= 1.1.0)
https://github.com/selwin/python-user-agents
pyuca (>= 1.1) (optional for proper sorting of strings)
https://github.com/jtauber/pyuca
phply (optional for PHP support)
https://github.com/viraptor/phply
Database backend
Any database supported in Django will work, see Database setup for Weblate and backends documentation for more details.
pytz (optional, but recommended by Django)
https://pypi.org/project/pytz/
python-bidi (optional for proper rendering of badges in RTL languages)
https://github.com/MeirKriheli/python-bidi
tesserocr (>= 2.0.0) (optional for screenshots OCR)
https://github.com/sirfz/tesserocr
akismet (>= 1.0) (optional for suggestion spam protection)
https://github.com/ubernostrum/akismet
PyYAML (>= 3.0) (optional for YAML files)
https://pyyaml.org/
backports.csv (needed on Python 2.7)
https://pypi.org/project/backports.csv/
Jellyfish (>= 0.6.1)
https://github.com/jamesturk/jellyfish
openpyxl (>=2.5.0) (for XLSX export/import)
https://openpyxl.readthedocs.io/en/stable/
Zeep (>=3.0.0) (optional for Microsoft Terminology Service)
https://python-zeep.readthedocs.io/

Other system requirements

The following dependencies have to be installed on the system:

Git (>= 1.6)
https://git-scm.com/
hub (optional for sending pull requests to GitHub)
https://hub.github.com/
git-review (optional for Gerrit support)
https://pypi.org/project/git-review/
git-svn (>= 2.10.0) (optional for Subversion support)
https://git-scm.com/docs/git-svn
tesseract and it’s data (optional for screenshots OCR)
https://github.com/tesseract-ocr/tesseract

Compile time dependencies

To compile some of the Python dependencies you might need to install their dependencies. This depends on how you install them, so please consult individual packages for documentation. You won’t need those if using prebuilt Wheels while installing using pip or when you use distribution packages.

Installing Weblate

Choose an installation method that best fits your environment.

The first choices include complete setup without relying on your system libraries:

You can also install Weblate directly on your system either fully using distribution packages (currently available for openSUSE only) or mixed setup.

Choose the installation method:

Also install dependencies according to your platform:

Installation in virtualenv

This is the recommended method if you don’t want to concern yourself with further detail. This will create a separate Python environment for Weblate, possibly duplicating some of the Python libraries on the system.

  1. Install the development files for libraries to be used during the building of the Python modules:

    # Debian/Ubuntu:
    apt install libxml2-dev libxslt-dev libfreetype6-dev libjpeg-dev libz-dev libyaml-dev python-dev
    
    # openSUSE/SLES:
    zypper install libxslt-devel libxml2-devel freetype-devel libjpeg-devel zlib-devel libyaml-devel python-devel
    
    # Fedora/RHEL/CentOS:
    dnf install libxslt-devel libxml2-devel freetype-devel libjpeg-devel zlib-devel libyaml-devel python-devel
    
  2. Install pip and virtualenv. Usually they are shipped by your distribution or with Python:

    # Debian/Ubuntu:
    apt-get install python-pip python-virtualenv
    
    # openSUSE/SLES:
    zypper install python-pip python-virtualenv
    
    # Fedora/RHEL/CentOS:
    dnf install python-pip python-virtualenv
    
  3. Create and activate virtualenv for Weblate:

    virtualenv ~/weblate-env
    . ~/weblate-env/bin/activate
    
  4. Install Weblate including all dependencies, you can also use pip to install optional dependencies:

    pip install Weblate
    # Optional deps
    pip install pytz python-bidi PyYAML pyuca
    
  5. Create your settings (in this example it would be in ~/weblate-env/lib/python2.7/site-packages/weblate/settings.py based on the settings_example.py in the same directory).

  6. You can now run Weblate commands using weblate command, see Management commands.

  7. To run webserver, use the wsgi wrapper installed with Weblate (in this case it is ~/weblate-env/lib/python2.7/site-packages/weblate/wsgi.py). Don’t forget to set the Python search path to your virtualenv as well (for example using virtualenv = /home/user/weblate-env in uWSGI).

Installing Weblate from Git

You can also run the latest version from Git. It is maintained, stable and production ready. It is most often the version running Hosted Weblate.

To get the latest sources using Git use:

git clone https://github.com/WeblateOrg/weblate.git

Note

If you are running a version from Git, you should also regenerate locale files every time you are upgrading. You can do this by invoking the script ./scripts/generate-locales.

Installing Weblate with pip

If you decide to install Weblate using the pip installer, you will notice some differences. Most importantly the command line interface is installed to the system path as weblate instead of ./manage.py as used in this documentation. Also when invoking this command, you will have to specify settings by the environment variable DJANGO_SETTINGS_MODULE on the command line, for example:

DJANGO_SETTINGS_MODULE=yourproject.settings weblate migrate

Requirements on Debian or Ubuntu

On recent releases of Debian or Ubuntu, most of the requirements are already packaged, to install them you can use apt-get:

apt-get install python-pip python-django translate-toolkit \
    python-whoosh python-pil \
    git mercurial \
    python-django-compressor python-django-crispy-forms \
    python-djangorestframework python-dateutil python-celery

# Optional packages for database backend:

# For PostgreSQL
apt-get install python-psycopg2
# For MySQL on Ubuntu (if using the Ubuntu package for Django)
apt-get install python-pymysql
# For MySQL on Debian (or Ubuntu if using upstream Django packages)
apt-get install python-mysqldb

On older releases, some required dependencies are missing or outdated, so you need to install several Python modules manually using pip:

# Dependencies for ``python-social-auth``
apt-get install python-requests-oauthlib python-six python-openid

# Social auth
pip install social-auth-core
pip install social-auth-app-django

# In case your distribution has ``python-django`` older than 1.9
pip install Django

# In case the ``python-django-crispy-forms`` package is missing
pip install django-crispy-forms

# In case ``python-whoosh`` package is misssing or older than 2.7
pip install whoosh

# In case the ``python-django-compressor`` package is missing,
# Try installing it by its older name, or by using pip:
apt-get install python-compressor
pip install django_compressor

# Optional for OCR support
apt-get install tesseract-ocr libtesseract-dev libleptonica-dev cython
pip install tesserocr

For proper sorting of Unicode strings, it is recommended to install pyuca:

pip install pyuca

Depending on how you intend to run Weblate and what you already have installed, you might need additional components:

# Web server option 1: NGINX and uWSGI
apt-get install nginx uwsgi uwsgi-plugin-python

# Web server option 2: Apache with ``mod_wsgi``
apt-get install apache2 libapache2-mod-wsgi

# Caching backend: Redis
apt-get install redis-server

# Database option 1: PostgreSQL
apt-get install postgresql

# Database option 2: MariaDB
apt-get install mariadb-server

# Database option 3: MySQL
apt-get install mysql-server

# SMTP server
apt-get install exim4

# GitHub PR support: ``hub``
# See https://hub.github.com/

Requirements on openSUSE

Most of requirements are available either directly in openSUSE or in devel:languages:python repository:

zypper install python-Django translate-toolkit \
    python-Whoosh python-Pillow \
    python-social-auth-core python-social-auth-app-django \
    Git mercurial python-pyuca \
    python-dateutil python-celery

# Optional for database backend
zypper install python-psycopg2      # For PostgreSQL
zypper install python-MySQL-python  # For MySQL

Depending on how you intend to run Weblate and what you already have installed, you might need additional components:

# Web server option 1: NGINX and uWSGI
zypper install nginx uwsgi uwsgi-plugin-python

# Web server option 2: Apache with ``mod_wsgi``
zypper install apache2 apache2-mod_wsgi

# Caching backend: Redis
zypper install redis-server

# Database option 1: PostgreSQL
zypper install postgresql

# Database option 2: MariaDB
zypper install mariadb

# Database option 3: MySQL
zypper install mysql

# SMTP server
zypper install postfix

# GitHub PR support: ``hub``
# See https://hub.github.com/

Requirements on macOS

If your Python was not installed using brew, make sure you have this in your .bash_profile file or executed somehow:

export PYTHONPATH="/usr/local/lib/python2.7/site-packages:$PYTHONPATH"

This configuration makes the installed libraries available to Python.

Requirements using pip installer

Most requirements can be also installed using the pip installer:

pip install -r requirements.txt

For building some of the extensions development files for several libraries are required, see Installation in virtualenv for instructions how to install these.

All optional dependencies (see above) can be installed using:

pip install -r requirements-optional.txt

Filesystem permissions

The Weblate process needs to be able to read and write to the directory where it keeps data - DATA_DIR.

The default configuration places them in the same tree as the Weblate sources, however you might prefer to move these to a better location such as: /var/lib/weblate.

Weblate tries to create these directories automatically, but it will fail when it does not have permissions to do so.

You should also take care when running Management commands, as they should be ran under the same user as Weblate itself is running, otherwise permissions on some files might be wrong.

Database setup for Weblate

It is recommended to run Weblate with some database server. Using a SQLite backend is really only suitable for testing purposes.

PostgreSQL

PostgreSQL is usually the best choice for Django based sites. It’s the reference database used for implementing Django database layer.

See also

PostgreSQL notes

Creating a database in PostgreSQL

It is usually a good idea to run Weblate in a separate database, and separate user account:

# If PostgreSQL was not installed before, set the master password
sudo -u postgres psql postgres -c "\password postgres"

# Create a database user called "weblate"
sudo -u postgres createuser -D -P weblate

# Create the database "weblate" owned by "weblate"
sudo -u postgres createdb -O weblate weblate

Configuring Weblate to use PostgreSQL

The settings.py snippet for PostgreSQL:

DATABASES = {
    'default': {
        # Database engine
        'ENGINE': 'django.db.backends.postgresql',
        # Database name
        'NAME': 'weblate',
        # Database user
        'USER': 'weblate',
        # Database password
        'PASSWORD': 'password',
        # Set to empty string for localhost
        'HOST': 'database.example.com',
        # Set to empty string for default
        'PORT': '',
    }
}

MySQL or MariaDB

MySQL or MariaDB are quite good choices for running Weblate. However when using MySQL you might hit some problems caused by it.

See also

MySQL notes

Unicode issues in MySQL

MySQL by default uses something called utf8, which can not store all Unicode characters, only those who fit into three bytes in utf-8 encoding. In case you’re using emojis or some other higher Unicode symbols you might hit errors when saving such data. Depending on the MySQL and Python bindings version, the produced error might look like this:

  • OperationalError: (1366, “Incorrect string value: ‘\xF0\xA8\xAB\xA1’ for column ‘target’ at row 1”)
  • UnicodeEncodeError: ‘ascii’ codec can’t encode characters in position 0-3: ordinal not in range(128)

To solve this, you need to change your database to use utf8mb4 (which is again a subset of Unicode, but this time one which can be stored in four bytes in utf-8 encoding, thus covering all chars currently defined in Unicode).

This can be achieved during creation of the database by selecting this character set (see Creating a database in MySQL) and specifying that character set in the connection settings (see Configuring Weblate to use MySQL).

In case you have an existing database, you can change it to utf8mb4 by, but this won’t change collation of existing fields:

ALTER DATABASE weblate CHARACTER SET utf8mb4;

Using this charset might however lead to problems with the default MySQL server settings, as each character now takes 4 bytes to store, and MySQL has an upper limit of 767 bytes for an index. In case this happens you will get one of the following error messages:

  • 1071: Specified key was too long; max key length is 767 bytes
  • 1709: Index column size too large. The maximum column size is 767 bytes.

There are two ways to work around this limitation. You can configure MySQL to not have this limit, see Using Innodb_large_prefix to Avoid ERROR 1071. Alternatively you can also adjust several settings for social-auth in your settings.py (see Configuration):

# Limit some social-auth fields to 191 chars to fit
# them in 767 bytes

SOCIAL_AUTH_UID_LENGTH = 191
SOCIAL_AUTH_NONCE_SERVER_URL_LENGTH = 191
SOCIAL_AUTH_ASSOCIATION_SERVER_URL_LENGTH = 191
SOCIAL_AUTH_ASSOCIATION_HANDLE_LENGTH = 191
SOCIAL_AUTH_EMAIL_LENGTH = 191

Transaction locking

MySQL by default uses a different transaction locking scheme than other databases, and in case you see errors like Deadlock found when trying to get lock; try restarting transaction it might be good idea to enable STRICT_TRANS_TABLES mode in MySQL. This can be done in the server configuration file (usually /etc/mysql/my.cnf on Linux):

[mysqld]
sql-mode=STRICT_TRANS_TABLES

See also

Setting sql_mode

Creating a database in MySQL

Create weblate user to access the weblate database:

# Grant all privileges to the user ``weblate``
GRANT ALL PRIVILEGES ON weblate.* TO 'weblate'@'localhost'  IDENTIFIED BY 'password';

# Create a database on MySQL >= 5.7.7
CREATE DATABASE weblate CHARACTER SET utf8mb4;

# Use utf8 for older versions
# CREATE DATABASE weblate CHARACTER SET utf8;

Configuring Weblate to use MySQL

The settings.py snippet for MySQL:

DATABASES = {
    'default': {
        # Database engine
        'ENGINE': 'django.db.backends.mysql',
        # Database name
        'NAME': 'weblate',
        # Database user
        'USER': 'weblate',
        # Database password
        'PASSWORD': 'password',
        # Set to empty string for localhost
        'HOST': 'database.example.com',
        # Set to empty string for default
        'PORT': '',
        # Additional database options
        'OPTIONS': {
            # In case of using an older MySQL server, which has MyISAM as a default storage
            # 'init_command': 'SET storage_engine=INNODB',
            # Uncomment for MySQL older than 5.7:
            # 'init_command': "SET sql_mode='STRICT_TRANS_TABLES'",
            # If your server supports it, see the Unicode issues above
           'charset': 'utf8mb4',
        }

    }
}

Other configurations

Configuring outgoing email

Weblate sends out emails on various occasions - for account activation and on various notifications configured by users. For this it needs access to a SMTP server.

The mail server setup is configured using these settings: EMAIL_HOST, EMAIL_HOST_PASSWORD, EMAIL_HOST_USER and EMAIL_PORT. Their names are quite self-explanatory, but you can find more info in the Django documentation.

Note

You can verify whether outgoing email is working correctly by using the sendtestemail management command.

Background tasks using Celery

New in version 3.2.

Weblate uses Celery to process background tasks. The example settings come with eager configuration, which does process all tasks in place, but you want to change this to something more reasonable for a production setup.

A typical setup using Redis as a backend looks like this:

CELERY_TASK_ALWAYS_EAGER = False
CELERY_BROKER_URL = 'redis://localhost:6379'
CELERY_RESULT_BACKEND = CELERY_BROKER_URL

You should also start the Celery worker to process the tasks and start scheduled tasks, this can be done directly on the command line (which is mostly useful when debugging or developing):

./examples/celery start
./examples/celery stop

Most likely you will want to run Celery as a daemon and that is covered by Daemonization. For the most common Linux setup using systemd, you can use the example files shipped in the examples folder listed below.

Systemd unit to be placed as /etc/systemd/system/celery-weblate.service:

[Unit]
Description=Celery Service (Weblate)
After=network.target

[Service]
Type=forking
User=weblate
Group=weblate
EnvironmentFile=/etc/default/celery-weblate
WorkingDirectory=/home/weblate/weblate
PermissionsStartOnly=true
ExecStartPre=/bin/mkdir -p /var/run/celery
ExecStartPre=/bin/chown -R weblate /var/run/celery/
ExecStartPre=/bin/mkdir -p /var/log/celery
ExecStartPre=/bin/chown -R weblate /var/log/celery/
ExecStart=/bin/sh -c '${CELERY_BIN} multi start ${CELERYD_NODES} \
  -A ${CELERY_APP} --pidfile=${CELERYD_PID_FILE} \
  --logfile=${CELERYD_LOG_FILE} --loglevel=${CELERYD_LOG_LEVEL} ${CELERYD_OPTS}'
ExecStop=/bin/sh -c '${CELERY_BIN} multi stopwait ${CELERYD_NODES} \
  --pidfile=${CELERYD_PID_FILE}'
ExecReload=/bin/sh -c '${CELERY_BIN} multi restart ${CELERYD_NODES} \
  -A ${CELERY_APP} --pidfile=${CELERYD_PID_FILE} \
  --logfile=${CELERYD_LOG_FILE} --loglevel=${CELERYD_LOG_LEVEL} ${CELERYD_OPTS}'

[Install]
WantedBy=multi-user.target

Environment configuration to be placed as /etc/default/celery-weblate:

# Name of nodes to start
CELERYD_NODES="celery search"

# Absolute or relative path to the 'celery' command:
CELERY_BIN="/usr/local/bin/celery"

# App instance to use
# comment out this line if you don't use an app
CELERY_APP="weblate"

# Extra command-line arguments to the worker,
# increase concurency if you get weblate.E019
CELERYD_OPTS="--beat:celery --concurrency:celery=2 --queues:celery=celery --prefetch-multiplier:celery=4 --concurrency:search=1 --queues:search=search --prefetch-multiplier:search=0"

# Logging configuration
# - %n will be replaced with the first part of the nodename.
# - %I will be replaced with the current child process index
#   and is important when using the prefork pool to avoid race conditions.
CELERYD_PID_FILE="/var/run/celery/weblate-%n.pid"
CELERYD_LOG_FILE="/var/log/celery/weblate-%n%I.log"
CELERYD_LOG_LEVEL="INFO"

# Internal Weblate variable to indicate we're running inside Celery
CELERY_WORKER_RUNNING="1"

Logrotate configuration to be placed as /etc/logrotate.d/celery:

/var/log/celery/*.log {
        weekly
        missingok
        rotate 12
        compress
        notifempty
}

Weblate comes with built-in setup for scheduled tasks. You can however define additional tasks in settings.py, for example (also see Lazy commits):

CELERY_BEAT_SCHEDULE = {
    # Unconditionally commit all changes every 2 minutes
    'commit': {
        'task': 'weblate.trans.tasks.commit_pending',
        # Ommiting hours will honor per component settings,
        # otherwise components with no changes older than this
        # won't be committed
        'kwargs': {'hours': 0},
        # How frequently to execute the job in seconds
        'schedule': 120,
    }
}

Note

The Celery process has to be executed under the same user as Weblate and the WSGI process, otherwise files in the DATA_DIR will be stored with mixed ownership, leading to runtime issues.

Installation

Copy weblate/settings_example.py to weblate/settings.py and adjust it to match your setup. You will probably want to adjust the following options:

ADMINS

List of site administrators to receive notifications when something goes wrong, for example notifications on failed merges, or Django errors.

See also

ADMINS

ALLOWED_HOSTS

If you are running Django 1.5 or newer, you need to set this to list the hosts your site is supposed to serve. For example:

ALLOWED_HOSTS = ['demo.weblate.org']

See also

ALLOWED_HOSTS

SESSION_ENGINE

Configure how your sessions will be stored. In case you keep the default database backend engine, you should schedule: ./manage.py clearsessions to remove stale session data from the database.

If you are using Redis as cache (see Enable caching) it is recommended to use it for sessions as well:

SESSION_ENGINE = 'django.contrib.sessions.backends.cache'

DATABASES

Connectivity to database server, please check Django’s documentation for more details.

DEBUG

Disable this for any production server. With debug mode enabled, Django will show backtraces in case of error to users, when you disable it, errors will be sent per email to ADMINS (see above).

Debug mode also slows down Weblate, as Django stores much more info internally in this case.

See also

DEBUG,

DEFAULT_FROM_EMAIL

Email sender address for outgoing email, for example registration emails.

See also

DEFAULT_FROM_EMAIL,

SECRET_KEY

Key used by Django to sign some info in cookies, see Django secret key for more info.

SERVER_EMAIL

Email used as sender address for sending emails to the administrator, for example notifications on failed merges.

See also

SERVER_EMAIL

Filling up the database

After your configuration is ready, you can run ./manage.py migrate to create the database structure. Now you should be able to create translation projects using the admin interface.

In case you want to run an installation non interactively, you can use ./manage.py migrate --noinput, and then create an admin user using createadmin command.

You should also log in to the admin interface (on /admin/ URL) and adjust the default sitename to match your domain by clicking on Sites and once there, change the example.com record to match your real domain name.

Once you are done, you should also check the Performance report in the admin interface, which will give you hints of potential non optimal configuration on your site.

Production setup

For a production setup you should carry out adjustments described in the following sections. The most critical settings will trigger a warning, which is indicated by a red exclamation mark in the top bar if logged in as a superuser:

../_images/admin-wrench.png

It is also recommended to inspect checks triggered by Django (though you might not need to fix all of them):

./manage.py check --deploy

Disable debug mode

Disable Django’s debug mode (DEBUG) by:

DEBUG = False

With debug mode on, Django stores all executed queries and shows users backtraces of errors, which is not desired in a production setup.

See also

Installation

Properly configure admins

Set the correct admin addresses to the ADMINS setting to defining who will receive email in case something goes wrong on the server, for example:

ADMINS = (
    ('Your Name', '[email protected]'),
)

See also

Installation

Set correct sitename

Adjust sitename in the admin interface, otherwise links in RSS or registration emails will not work.

Please open the admin interface and edit the default sitename and domain under the Sites › Sites (or do it directly at the /admin/sites/site/1/ URL under your Weblate installation). You have to change the Domain name to match your setup.

Note

This setting should only contain the domain name. For configuring protocol, (enabling HTTPS) use ENABLE_HTTPS and for changing URL, use URL_PREFIX.

Alternatively, you can set the site name from the commandline using changesite. For example, when using the built-in server:

./manage.py changesite --set-name 127.0.0.1:8000

For a production site, you want something like:

./manage.py changesite --set-name weblate.example.com

Correctly configure HTTPS

It is strongly recommended to run Weblate using the encrypted HTTPS protocol. After enabling it, you should set ENABLE_HTTPS in the settings, which also adjusts several other related Django settings in the example configuration.

You might want to set up HSTS as well, see SSL/HTTPS for more details.

Use a powerful database engine

SQLite is usually not good enough for a production environment, see Database setup for Weblate for more info.

Enable caching

If possible, use Redis from Django by adjusting the CACHES configuration variable, for example:

CACHES = {
    'default': {
        'BACKEND': 'django_redis.cache.RedisCache',
        'LOCATION': 'redis://127.0.0.1:6379/0',
        # If redis is running on same host as Weblate, you might
        # want to use unix sockets instead:
        # 'LOCATION': 'unix:///var/run/redis/redis.sock?db=0',
        'OPTIONS': {
            'CLIENT_CLASS': 'django_redis.client.DefaultClient',
            'PARSER_CLASS': 'redis.connection.HiredisParser',
        }
    }
}

Alternatively, you can also use Memcached:

CACHES = {
    'default': {
        'BACKEND': 'django.core.cache.backends.memcached.MemcachedCache',
        'LOCATION': '127.0.0.1:11211',
    }
}

Avatar caching

In addition to caching of Django, Weblate performs caching of avatars. It is recommended to use a separate, file-backed cache for this purpose:

CACHES = {
    'default': {
        # Default caching backend setup, see above
        'BACKEND': 'django_redis.cache.RedisCache',
        'LOCATION': 'unix:///var/run/redis/redis.sock?db=0',
        'OPTIONS': {
            'CLIENT_CLASS': 'django_redis.client.DefaultClient',
            'PARSER_CLASS': 'redis.connection.HiredisParser',
        }
    },
    'avatar': {
        'BACKEND': 'django.core.cache.backends.filebased.FileBasedCache',
        'LOCATION': os.path.join(DATA_DIR, 'avatar-cache'),
        'TIMEOUT': 604800,
        'OPTIONS': {
            'MAX_ENTRIES': 1000,
        },
    }

Configure email addresses

Weblate needs to send out emails on several occasions, and these emails should have a correct sender address, please configure SERVER_EMAIL and DEFAULT_FROM_EMAIL to match your environment, for example:

SERVER_EMAIL = '[email protected]'
DEFAULT_FROM_EMAIL = '[email protected]'

Allowed hosts setup

Django 1.5 and newer require ALLOWED_HOSTS to hold a list of domain names your site is allowed to serve, leaving it empty will block any requests.

See also

ALLOWED_HOSTS

The pyuca library

The pyuca library is optionally used by Weblate to sort Unicode strings. This way language names are properly sorted, even in non-ASCII languages like Japanese, Chinese or Arabic, or for languages that employ diactrics.

Django secret key

The SECRET_KEY setting is used by Django to sign cookies, and you should really generate your own value rather than using the one from the example setup.

You can generate a new key using examples/generate-secret-key shipped with Weblate.

See also

SECRET_KEY

Static files

If you see sparsely designed admin interface, the CSS files required for it are not loaded. This usually happens if you are running in non-debug mode and have not configured your web server to serve them. The recommended setup is described in the Serving static files chapter.

Home directory

Changed in version 2.1: This is no longer required, Weblate now stores all its data in DATA_DIR.

The home directory for the user running Weblate should exist and be writable by this user. This is especially needed if you want to use SSH to access private repositories, but Git might need to access this directory as well (depending on the Git version you use).

You can change the directory used by Weblate in settings.py, for example to set it to configuration directory under the Weblate tree:

os.environ['HOME'] = os.path.join(BASE_DIR, 'configuration')

Note

On Linux, and other UNIX like systems, the path to user’s home directory is defined in /etc/passwd. Many distributions default to a non-writable directory for users used for serving web content (such as apache, www-data or wwwrun, so you either have to run Weblate under a different user, or change this setting.

Template loading

It is recommended to use a cached template loader for Django. It caches parsed templates and avoids the need to do parsing with every single request. You can configure it using the following snippet (the loaders setting is important here):

TEMPLATES = [
    {
        'BACKEND': 'django.template.backends.django.DjangoTemplates',
        'DIRS': [
            os.path.join(BASE_DIR, 'templates'),
        ],
        'OPTIONS': {
            'context_processors': [
                'django.contrib.auth.context_processors.auth',
                'django.template.context_processors.debug',
                'django.template.context_processors.i18n',
                'django.template.context_processors.request',
                'django.template.context_processors.csrf',
                'django.contrib.messages.context_processors.messages',
                'weblate.trans.context_processors.weblate_context',
            ],
            'loaders': [
                ('django.template.loaders.cached.Loader', [
                    'django.template.loaders.filesystem.Loader',
                    'django.template.loaders.app_directories.Loader',
                ]),
            ],
        },
    },
]

Running maintenance tasks

For optimal performance, it is good idea to run some maintenance tasks in the background.

Changed in version 3.2: Since version 3.2, the default way of executing these tasks is using Celery and Weblate already comes with proper configuration, see Background tasks using Celery.

Running server

Running Weblate is not different from running any other Django based program. Django is usually executed as uWSGI or fcgi (see examples for different webservers below).

For testing purposes, you can use the built-in web server in Django:

./manage.py runserver

Warning

Do not use this in production, as this has severe performance limitations.

Serving static files

Changed in version 2.4: Prior to version 2.4, Weblate didn’t properly use the Django static files framework and the setup was more complex.

Django needs to collect its static files in a single directory. To do so, execute ./manage.py collectstatic --noinput. This will copy the static files into a directory specified by the STATIC_ROOT setting (this defaults to a static directory inside DATA_DIR).

It is recommended to serve static files directly from your web server, you should use that for the following paths:

/static/
Serves static files for Weblate and the admin interface (from defined by STATIC_ROOT).
/media/
Used for user media uploads (e.g. screenshots).
/favicon.ico
Should be rewritten to rewrite a rule to serve /static/favicon.ico
/robots.txt
Should be rewritten to rewrite a rule to serve /static/robots.txt

Content security policy

The default Weblate configuration enables weblate.middleware.SecurityMiddleware middleware which sets security related HTTP headers like Content-Security-Policy or X-XSS-Protection. These are by default set up to work with Weblate and it’s configuration, but this might clash with your customization. If that is the case, it is recommended to disable this middleware and set these headers manually.

Sample configuration for Apache

The following configuration runs Weblate as WSGI, you need to have enabled mod_wsgi (available as examples/apache.conf):

#
# VirtualHost for weblate
#
# This example assumes Weblate is installed in /usr/share/weblate
#
# If using virtualenv, you need to add it to search path as well:
# WSGIPythonPath /usr/share/weblate:/path/to/your/venv/lib/python2.7/site-packages
#
<VirtualHost *:80>
    ServerAdmin [email protected]
    ServerName weblate.example.org

    # DATA_DIR/static/robots.txt
    Alias /robots.txt /var/lib/weblate/static/robots.txt
    # DATA_DIR/static/favicon.ico
    Alias /favicon.ico /var/lib/weblate/static/favicon.ico

    # DATA_DIR/static/
    Alias /static/ /var/lib/weblate/static/
    <Directory /var/lib/weblate/static/>
        Require all granted
    </Directory>

    # DATA_DIR/media/
    Alias /media/ /var/lib/weblate/media/
    <Directory /var/lib/weblate/media/>
        Require all granted
    </Directory>

    WSGIDaemonProcess weblate.example.org python-path=/usr/share/weblate
    WSGIProcessGroup weblate.example.org
    WSGIApplicationGroup %{GLOBAL}

    WSGIScriptAlias / /usr/share/weblate/weblate/wsgi.py process-group=weblate.example.org
    WSGIPassAuthorization On

    <Directory /usr/share/weblate/weblate>
        <Files wsgi.py>
        Require all granted
        </Files>
    </Directory>

</VirtualHost>

This configuration is for Apache 2.4 and later. For earlier versions of Apache, replace Require all granted with Allow from all.

Sample configuration for Apache and Gunicorn

The following configuration runs Weblate in Gunicorn and Apache 2.4 (available as examples/apache.gunicorn.conf):

#
# VirtualHost for weblate using gunicorn on localhost:8000
#
# This example assumes Weblate is installed in /usr/share/weblate
#
#

<VirtualHost *:443>
    ServerAdmin [email protected]
    ServerName weblate.example.org

    # DATA_DIR/static/robots.txt
    Alias /robots.txt /var/lib/weblate/static/robots.txt
    # DATA_DIR/static/favicon.ico
    Alias /favicon.ico /var/lib/weblate/static/favicon.ico

    # DATA_DIR/static/
    Alias /static/ /var/lib/weblate/static/
    <Directory /var/lib/weblate/static/>
        Require all granted
    </Directory>

    # DATA_DIR/media/
    Alias /media/ /var/lib/weblate/media/
    <Directory /var/lib/weblate/media/>
        Require all granted
    </Directory>

    SSLEngine on
    SSLCertificateFile /etc/apache2/ssl/https_cert.cert
    SSLCertificateKeyFile /etc/apache2/ssl/https_key.pem
    SSLProxyEngine On

    ProxyPass /robots.txt !
    ProxyPass /favicon.ico !
    ProxyPass /static/ !
    ProxyPass /media/ !

    ProxyPass / http://localhost:8000/
    ProxyPassReverse / http://localhost:8000/
    ProxyPreserveHost On
</VirtualHost>

Sample configuration for NGINX and uWSGI

The following configuration runs Weblate as uWSGI under the NGINX webserver.

Configuration for NGINX (also available as examples/weblate.nginx.conf):

server {
    listen 80;
    server_name weblate;
    root /usr/share/weblate;

    location ~ ^/favicon.ico$ {
        # DATA_DIR/static/favicon.ico
        alias /var/lib/weblate/static/favicon.ico;
        expires 30d;
    }

    location ~ ^/robots.txt$ {
        # DATA_DIR/static/robots.txt
        alias /var/lib/weblate/static/robots.txt;
        expires 30d;
    }

    location /static/ {
        # DATA_DIR/static/
        alias /var/lib/weblate/static/;
        expires 30d;
    }

    location /media/ {
        # DATA_DIR/media/
        alias /var/lib/weblate/media/;
        expires 30d;
    }

    location / {
        include uwsgi_params;
        # Needed for long running operations in admin interface
        uwsgi_read_timeout 3600;
        # Adjust based to uwsgi configuration:
        uwsgi_pass unix:///run/uwsgi/app/weblate/socket;
        # uwsgi_pass 127.0.0.1:8080;
    }
}

Configuration for uWSGI (also available as examples/weblate.uwsgi.ini):

[uwsgi]
plugins       = python
master        = true
protocol      = uwsgi
socket        = 127.0.0.1:8080
wsgi-file     = /usr/local/lib/python3.6/dist-packages/weblate/wsgi.py

# Add path to Weblate checkout if you did not install
# Weblate by pip
# python-path   = /path/to/weblate

# In case you're using virtualenv uncomment this:
# virtualenv = /path/to/weblate/virtualenv

# Needed for OAuth/OpenID
buffer-size   = 8192

# Increase number of workers for heavily loaded sites
# workers       = 6

# Child processes do not need file descriptors
close-on-exec = true

# Avoid default 0000 umask
umask = 0022

# Run as weblate user
uid = weblate
gid = weblate

# Enable harakiri mode (kill requests after some time)
# harakiri = 3600
# harakiri-verbose = true

# Enable uWSGI stats server
# stats = :1717
# stats-http = true

# Do not log some errors caused by client disconnects
ignore-sigpipe = true
ignore-write-errors = true
disable-write-exception = true

Running Weblate under path

Changed in version 1.3: This is supported since Weblate 1.3.

A sample Apache configuration to serve Weblate under /weblate. Again using mod_wsgi (also available as examples/apache-path.conf):

# Example Apache configuration for running Weblate under /weblate path

WSGIPythonPath /usr/share/weblate
# If using virtualenv, you need to add it to search path as well:
# WSGIPythonPath /usr/share/weblate:/path/to/your/venv/lib/python2.7/site-packages
<VirtualHost *:80>
    ServerAdmin [email protected]
    ServerName image.weblate.org

    # DATA_DIR/static/robots.txt
    Alias /weblate/robots.txt /var/lib/weblate/static/robots.txt
    # DATA_DIR/static/favicon.ico
    Alias /weblate/favicon.ico /var/lib/weblate/static/favicon.ico

    # DATA_DIR/static/
    Alias /weblate/static/ /var/lib/weblate/static/
    <Directory /var/lib/weblate/static/>
        Require all granted
    </Directory>

    # DATA_DIR/media/
    Alias /weblate/media/ /var/lib/weblate/media/
    <Directory /var/lib/weblate/media/>
        Require all granted
    </Directory>

    WSGIScriptAlias /weblate /usr/share/weblate/weblate/wsgi.py/weblate
    WSGIPassAuthorization On

    <Directory /usr/share/weblate/weblate>
        <Files wsgi.py>
        Require all granted
        </Files>
    </Directory>

</VirtualHost>

Additionally, you will have to adjust weblate/settings.py:

URL_PREFIX = '/weblate'

Monitoring Weblate

Weblate provides the /healthz/ URL to be used in simple health checks, for example using Kubernetes.

Collecting error reports

It is good idea to collect errors from any Django program in structured way, and Weblate is no exception from this rule. You might find several services providing this, Weblate has basic support for the following ones:

Sentry

Weblate has built in support for Sentry. To use it it’s enough to follow instructions for Sentry for Python.

In short, you need to adjust settings.py:

import raven

# Add raven to apps:
INSTALLED_APPS = (
    # ... other app classes ...
    'raven.contrib.django.raven_compat',
)


RAVEN_CONFIG = {
    'dsn': 'https://id:[email protected]/',
    # Setting public_dsn will allow collecting user feedback on errors
    'public_dsn': 'https://[email protected]/',
    # If you are using git, you can also automatically configure the
    # release based on the git info.
    'release': raven.fetch_git_sha(BASE_DIR),
}

Rollbar

Weblate has built-in support for Rollbar. To use it it’s enough to follow instructions for Rollbar notifier for Python.

In short, you need to adjust settings.py:

# Add rollbar as last middleware:
MIDDLEWARE = [
    # … other middleware classes …
    'rollbar.contrib.django.middleware.RollbarNotifierMiddleware',
]

# Configure client access
ROLLBAR = {
    'access_token': 'POST_SERVER_ITEM_ACCESS_TOKEN',
    'client_token': 'POST_CLIENT_ITEM_ACCESS_TOKEN',
    'environment': 'development' if DEBUG else 'production',
    'branch': 'master',
    'root': '/absolute/path/to/code/root',
}

Everything else is integrated automatically, you will now collect both server and client side errors.

Migrating Weblate to another server

Migrating Weblate to another server should be pretty easy, however it stores data in few locations which you should migrate carefully. The best approach is to stop Weblate for the migration.

Migrating database

Depending on your database backend, you might have several options to migrate the database. The most straightforward one is to dump the database on one server and import it on the new one. Alternatively you can use replication in case your database supports it.

The best approach is to use database native tools, as they are usually the most effective (e.g. mysqldump or pg_dump). If you want to migrate between different databases, the only option might be to use Django management to dump and import the database:

# Export current data
./manage.py dumpdata > /tmp/weblate.dump
# Import dump
./manage.py loaddata /tmp/weblate.dump

Migrating VCS repositories

The VCS repositories stored under DATA_DIR need to be migrated as well. You can simply copy them or use rsync to do the migration more effectively.

Migrating fulltext index

For the fulltext index, (stored in DATA_DIR) it is better not to migrate it, but rather generate a fresh one using rebuild_index.

Other notes

Don’t forget to move other services Weblate might have been using like Redis, Memcached, Cron jobs or custom authentication backends.