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Configuration instructions

Installing Weblate

install/docker install/venv-debian install/venv-suse install/venv-redhat install/venv-macos install/source install/openshift install/kubernetes

Depending on your setup and experience, choose an appropriate installation method for you:

  • install/docker, recommended for production setups.

  • Virtualenv installation, recommended for production setups:

    • install/venv-debian
    • install/venv-suse
    • install/venv-redhat
    • install/venv-macos
  • install/source, recommended for development.
  • install/openshift
  • install/kubernetes

Software requirements

Operating system

Weblate is known to work on Linux, FreeBSD and macOS. Other Unix like systems will most likely work too.

Weblate is not supported on Windows. But it may still work and patches are happily accepted.

Other services

Weblate is using other services for its operation. You will need at least following services running:

  • PostgreSQL database server, see database-setup.
  • Redis server for cache and tasks queue, see celery.
  • SMTP server for outgoing e-mail, see out-mail.

Python dependencies

Weblate is written in Python and supports Python 3.6 or newer. You can install dependencies using pip or from your distribution packages, full list is available in requirements.txt.

Most notable dependencies:

Django

https://www.djangoproject.com/

Celery

https://docs.celeryq.dev/

Translate Toolkit

https://toolkit.translatehouse.org/

translation-finder

https://github.com/WeblateOrg/translation-finder

Python Social Auth

https://python-social-auth.readthedocs.io/

Django REST Framework

https://www.django-rest-framework.org/

Optional dependencies

Following modules are necessary for some Weblate features. You can find all of them in requirements-optional.txt.

Mercurial (optional for vcs-mercurial repositories support)

https://www.mercurial-scm.org/

phply (optional for php)

https://github.com/viraptor/phply

tesserocr (optional for OCR in screenshots)

https://github.com/sirfz/tesserocr

python-akismet (optional for spam-protection)

https://github.com/Nekmo/python-akismet

ruamel.yaml (optional for yaml)

https://pypi.org/project/ruamel.yaml/

Zeep (optional for mt-microsoft-terminology)

https://docs.python-zeep.org/

aeidon (optional for subtitles)

https://pypi.org/project/aeidon/

fluent.syntax (optional for fluent)

https://projectfluent.org/

Hint

When installing using pip, you can directly specify desired features when installing:

pip install "Weblate[PHP,Fluent]"

Or you can install Weblate with all optional features:

pip install "Weblate[all]"

Or you can install Weblate without any optional features:

pip install Weblate

Database backend dependencies

Weblate supports PostgreSQL, MySQL and MariaDB, see database-setup and backends documentation for more details.

Other system requirements

The following dependencies have to be installed on the system:

Git

https://git-scm.com/

Pango, Cairo and related header files and GObject introspection data

https://cairographics.org/, https://pango.gnome.org/, see pangocairo

git-review (optional for Gerrit support)

https://pypi.org/project/git-review/

git-svn (optional for Subversion support)

https://git-scm.com/docs/git-svn

tesseract and its data (optional for screenshots OCR)

https://github.com/tesseract-ocr/tesseract

licensee (optional for detecting license when creating component)

https://github.com/licensee/licensee

Build-time dependencies

To build some of the python-deps 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.

Pango and Cairo

3.7

Weblate uses Pango and Cairo for rendering bitmap widgets (see promotion) and rendering checks (see fonts). To properly install Python bindings for those you need to install system libraries first - you need both Cairo and Pango, which in turn need GLib. All those should be installed with development files and GObject introspection data.

Verifying release signatures

Weblate release are cryptographically signed by the releasing developer. Currently this is Michal Čihař. Fingerprint of his PGP key is:

63CB 1DF1 EF12 CF2A C0EE 5A32 9C27 B313 42B7 511D

and you can get more identification information from <https://keybase.io/nijel>.

You should verify that the signature matches the archive you have downloaded. This way you can be sure that you are using the same code that was released. You should also verify the date of the signature to make sure that you downloaded the latest version.

Each archive is accompanied with .asc files which contain the PGP signature for it. Once you have both of them in the same folder, you can verify the signature:

$ gpg --verify Weblate-3.5.tar.xz.asc
gpg: assuming signed data in 'Weblate-3.5.tar.xz'
gpg: Signature made Ne 3. března 2019, 16:43:15 CET
gpg:                using RSA key 87E673AF83F6C3A0C344C8C3F4AA229D4D58C245
gpg: Can't check signature: public key not found

As you can see GPG complains that it does not know the public key. At this point you should do one of the following steps:

  • Use wkd to download the key:
$ gpg --auto-key-locate wkd --locate-keys michal@cihar.com
pub   rsa4096 2009-06-17 [SC]
      63CB1DF1EF12CF2AC0EE5A329C27B31342B7511D
uid           [ultimate] Michal Čihař <michal@cihar.com>
uid           [ultimate] Michal Čihař <nijel@debian.org>
uid           [ultimate] [jpeg image of size 8848]
uid           [ultimate] Michal Čihař (Braiins) <michal.cihar@braiins.cz>
sub   rsa4096 2009-06-17 [E]
sub   rsa4096 2015-09-09 [S]
$ gpg --import wmxth3chu9jfxdxywj1skpmhsj311mzm
  • Download and import the key from one of the key servers:
$ gpg --keyserver hkp://pgp.mit.edu --recv-keys 87E673AF83F6C3A0C344C8C3F4AA229D4D58C245
gpg: key 9C27B31342B7511D: "Michal Čihař <michal@cihar.com>" imported
gpg: Total number processed: 1
gpg:              unchanged: 1

This will improve the situation a bit - at this point you can verify that the signature from the given key is correct but you still can not trust the name used in the key:

$ gpg --verify Weblate-3.5.tar.xz.asc
gpg: assuming signed data in 'Weblate-3.5.tar.xz'
gpg: Signature made Ne 3. března 2019, 16:43:15 CET
gpg:                using RSA key 87E673AF83F6C3A0C344C8C3F4AA229D4D58C245
gpg: Good signature from "Michal Čihař <michal@cihar.com>" [ultimate]
gpg:                 aka "Michal Čihař <nijel@debian.org>" [ultimate]
gpg:                 aka "[jpeg image of size 8848]" [ultimate]
gpg:                 aka "Michal Čihař (Braiins) <michal.cihar@braiins.cz>" [ultimate]
gpg: WARNING: This key is not certified with a trusted signature!
gpg:          There is no indication that the signature belongs to the owner.
Primary key fingerprint: 63CB 1DF1 EF12 CF2A C0EE  5A32 9C27 B313 42B7 511D

The problem here is that anybody could issue the key with this name. You need to ensure that the key is actually owned by the mentioned person. The GNU Privacy Handbook covers this topic in the chapter Validating other keys on your public keyring. The most reliable method is to meet the developer in person and exchange key fingerprints, however you can also rely on the web of trust. This way you can trust the key transitively through signatures of others, who have met the developer in person.

Once the key is trusted, the warning will not occur:

$ gpg --verify Weblate-3.5.tar.xz.asc
gpg: assuming signed data in 'Weblate-3.5.tar.xz'
gpg: Signature made Sun Mar  3 16:43:15 2019 CET
gpg:                using RSA key 87E673AF83F6C3A0C344C8C3F4AA229D4D58C245
gpg: Good signature from "Michal Čihař <michal@cihar.com>" [ultimate]
gpg:                 aka "Michal Čihař <nijel@debian.org>" [ultimate]
gpg:                 aka "[jpeg image of size 8848]" [ultimate]
gpg:                 aka "Michal Čihař (Braiins) <michal.cihar@braiins.cz>" [ultimate]

Should the signature be invalid (the archive has been changed), you would get a clear error regardless of the fact that the key is trusted or not:

$ gpg --verify Weblate-3.5.tar.xz.asc
gpg: Signature made Sun Mar  3 16:43:15 2019 CET
gpg:                using RSA key 87E673AF83F6C3A0C344C8C3F4AA229D4D58C245
gpg: BAD signature from "Michal Čihař <michal@cihar.com>" [ultimate]

Filesystem permissions

The Weblate process needs to be able to read and write to the directory where it keeps data - DATA_DIR. All files within this directory should be owned and writable by the user running all Weblate processes (typically WSGI and Celery, see server and celery).

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 manage, as they should be ran under the same user as Weblate itself is running, otherwise permissions on some files might be wrong.

In the Docker container, all files in the /app/data volume have to be owned by the weblate user inside the container (UID 1000).

static-files

Database setup for Weblate

It is recommended to run Weblate with a PostgreSQL database server.

production-database, django:ref/databases, database-migration

PostgreSQL

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

Note

Weblate uses trigram extension which has to be installed separately in some cases. Look for postgresql-contrib or a similarly named package.

django: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 main password
sudo -u postgres psql postgres -c "\password postgres"

# Create a database user called "weblate"
sudo -u postgres createuser --superuser --pwprompt weblate

# Create the database "weblate" owned by "weblate"
sudo -u postgres createdb -E UTF8 -O weblate weblate

Hint

If you don't want to make the Weblate user a superuser in PostgreSQL, you can omit that. In that case you will have to perform some of the migration steps manually as a PostgreSQL superuser in schema Weblate will use:

CREATE EXTENSION IF NOT EXISTS pg_trgm WITH SCHEMA weblate;
CREATE EXTENSION IF NOT EXISTS btree_gin WITH SCHEMA 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",
        # Name of role to alter to set parameters in PostgreSQL,
        # use in case role name is different than user used for authentication.
        # "ALTER_ROLE": "weblate",
        # Database password
        "PASSWORD": "password",
        # Set to empty string for localhost
        "HOST": "database.example.com",
        # Set to empty string for default
        "PORT": "",
    }
}

The database migration performs ALTER ROLE on database role used by Weblate. In most cases the name of the role matches username. In more complex setups the role name is different than username and you will get error about non-existing role during the database migration (psycopg2.errors.UndefinedObject: role "weblate@hostname" does not exist). This is known to happen with Azure Database for PostgreSQL, but it's not limited to this environment. Please set ALTER_ROLE to change name of the role Weblate should alter during the database migration.

MySQL and MariaDB

Hint

Some Weblate features will perform better with postgresql. This includes searching and translation memory, which both utilize full-text features in the database and PostgreSQL implementation is superior.

Weblate can be also used with MySQL or MariaDB, please see django:mysql-notes and django:mariadb-notes for caveats using Django with those. Because of the limitations it is recommended to use postgresql for new installations.

Weblate requires MySQL at least 5.7.8 or MariaDB at least 10.2.7.

Following configuration is recommended for Weblate:

  • Use the utf8mb4 charset to allow representation of higher Unicode planes (for example emojis).
  • Configure the server with innodb_large_prefix to allow longer indices on text fields.
  • Set the isolation level to READ COMMITTED.
  • The SQL mode should be set to STRICT_TRANS_TABLES.

MySQL 8.x, MariaDB 10.5.x or newer have reasonable default configuration so that no server tweaking should be necessary and all what is needed can be configured on the client side.

Below is an example /etc/my.cnf.d/server.cnf for a server with 8 GB of RAM. These settings should be sufficient for most installs. MySQL and MariaDB have tunables that will increase the performance of your server that are considered not necessary unless you are planning on having large numbers of concurrent users accessing the system. See the various vendors documentation on those details.

It is absolutely critical to reduce issues when installing that the setting innodb_file_per_table is set properly and MySQL/MariaDB restarted before you start your Weblate install.

[mysqld]
character-set-server = utf8mb4
character-set-client = utf8mb4
collation-server = utf8mb4_unicode_ci

datadir=/var/lib/mysql

log-error=/var/log/mariadb/mariadb.log

innodb_large_prefix=1
innodb_file_format=Barracuda
innodb_file_per_table=1
innodb_buffer_pool_size=2G
sql_mode=STRICT_TRANS_TABLES

Hint

In case you are getting #1071 - Specified key was too long; max key length is 767 bytes error, please update your configuration to include the innodb settings above and restart your install.

Hint

In case you are getting #2006 - MySQL server has gone away error, configuring django:CONN_MAX_AGE might help.

Configuring Weblate to use MySQL/MariaDB

The settings.py snippet for MySQL and MariaDB:

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": "127.0.0.1",
        # Set to empty string for default
        "PORT": "3306",
        # In case you wish to use additional
        # connection options
        "OPTIONS": {},
    }
}

You should also create the weblate user account in MySQL or MariaDB before you begin the install. Use the commands below to achieve that:

GRANT ALL ON weblate.* to 'weblate'@'localhost' IDENTIFIED BY 'password';
FLUSH PRIVILEGES;

Other configurations

Configuring outgoing e-mail

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

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

Hint

In case you get error about not supported authentication (for example SMTP AUTH extension not supported by server), it is most likely caused by using insecure connection and server refuses to authenticate this way. Try enabling django:EMAIL_USE_TLS in such case.

debug-mails, Configuring outgoing e-mail in Docker container <docker-mail>

Running behind reverse proxy

Several features in Weblate rely on being able to get client IP address. This includes rate-limit, spam-protection or audit-log.

In default configuration Weblate parses IP address from REMOTE_ADDR which is set by the WSGI handler.

In case you are running a reverse proxy, this field will most likely contain its address. You need to configure Weblate to trust additional HTTP headers and parse the IP address from these. This can not be enabled by default as it would allow IP address spoofing for installations not using a reverse proxy. Enabling IP_BEHIND_REVERSE_PROXY might be enough for the most usual setups, but you might need to adjust IP_PROXY_HEADER and IP_PROXY_OFFSET as well.

Another thing to take care of is the :http:header:Host header. It should match to whatever is configured as SITE_DOMAIN. Additional configuration might be needed in your reverse proxy (for example use ProxyPreserveHost On for Apache or proxy_set_header Host $host; with nginx).

spam-protection, rate-limit, audit-log, IP_BEHIND_REVERSE_PROXY, IP_PROXY_HEADER, IP_PROXY_OFFSET, django:SECURE_PROXY_SSL_HEADER

HTTP proxy

Weblate does execute VCS commands and those accept proxy configuration from environment. The recommended approach is to define proxy settings in settings.py:

import os

os.environ["http_proxy"] = "http://proxy.example.com:8080"
os.environ["HTTPS_PROXY"] = "http://proxy.example.com:8080"

Adjusting configuration

sample-configuration

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

ADMINS

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

django:ADMINS, production-admins

ALLOWED_HOSTS

ALLOWED_HOSTS

You need to set this to list the hosts your site is supposed to serve. For example:

ALLOWED_HOSTS = ["demo.weblate.org"]

Alternatively you can include wildcard:

ALLOWED_HOSTS = ["*"]

django:ALLOWED_HOSTS, WEBLATE_ALLOWED_HOSTS, production-hosts

SESSION_ENGINE

SESSION_ENGINE

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

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

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

django:configuring-sessions, django:SESSION_ENGINE

DATABASES

DATABASES

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

database-setup, django:DATABASES, django:ref/databases

DEBUG

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 e-mail to ADMINS (see above).

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

django:DEBUG, production-debug

DEFAULT_FROM_EMAIL

DEFAULT_FROM_EMAIL

E-mail sender address for outgoing e-mail, for example registration e-mails.

django:DEFAULT_FROM_EMAIL

SECRET_KEY

SECRET_KEY

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

django:SECRET_KEY

SERVER_EMAIL

SERVER_EMAIL

E-mail used as sender address for sending e-mails to the administrator, for example notifications on failed merges.

django:SERVER_EMAIL

Filling up the database

After your configuration is ready, you can run weblate 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 weblate migrate --noinput, and then create an admin user using createadmin command.

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.

config, privileges

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 an exclamation mark in the top bar if signed in as a superuser:

image

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

weblate check --deploy

You can also review the very same checklist from the management-interface.

django:howto/deployment/checklist

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.

configuration

Properly configure admins

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

ADMINS = (("Your Name", "your_email@example.com"),)

configuration

Set correct site domain

Adjust site name and domain in the admin interface, otherwise links in RSS or registration e-mails will not work. This is configured using SITE_DOMAIN which should contain site domain name.

4.2

Prior to the 4.2 release the Django sites framework was used instead, please see django:ref/contrib/sites.

production-hosts, production-ssl SITE_DOMAIN, WEBLATE_SITE_DOMAIN, ENABLE_HTTPS

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:

ENABLE_HTTPS = True

Hint

You might want to set up HSTS as well, see django:security-recommendation-ssl for more details.

ENABLE_HTTPS, production-hosts, production-site

Set properly SECURE_HSTS_SECONDS

If your site is served over SSL, you have to consider setting a value for django:SECURE_HSTS_SECONDS in the settings.py to enable HTTP Strict Transport Security. By default it's set to 0 as shown below.

SECURE_HSTS_SECONDS = 0

If set to a non-zero integer value, the django:django.middleware.security.SecurityMiddleware sets the django:http-strict-transport-security header on all responses that do not already have it.

Warning

Setting this incorrectly can irreversibly (for some time) break your site. Read the django:http-strict-transport-security documentation first.

Use a powerful database engine

  • Please use PostgreSQL for a production environment, see database-setup for more info.
  • Use adjacent location for running the database server, otherwise the networking performance or reliability might ruin your Weblate experience.
  • Check the database server performance or tweak its configuration, for example using PGTune.

database-setup, database-migration, configuration, django:ref/databases

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",
        },
    }
}

Hint

In case you change Redis settings for the cache, you might need to adjust them for Celery as well, see celery.

production-cache-avatar, django:topics/cache

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,
        },
    },
}

ENABLE_AVATARS, AVATAR_URL_PREFIX, avatars, production-cache, django:topics/cache

Configure e-mail sending

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

SERVER_EMAIL = "admin@example.org"
DEFAULT_FROM_EMAIL = "weblate@example.org"

Note

To disable sending e-mails by Weblate set django:EMAIL_BACKEND to django.core.mail.backends.dummy.EmailBackend.

This will disable all e-mail delivery including registration or password reset e-mails.

configuration, out-mail, :stddjango:EMAIL_BACKEND, :stddjango:DEFAULT_FROM_EMAIL, :stddjango:SERVER_EMAIL

Allowed hosts setup

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

In case this is not configured to match your HTTP server, you will get errors like Invalid HTTP_HOST header: '1.1.1.1'. You may need to add '1.1.1.1' to ALLOWED_HOSTS.

Hint

On Docker container, this is available as WEBLATE_ALLOWED_HOSTS.

ALLOWED_HOSTS, WEBLATE_ALLOWED_HOSTS, production-site

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 weblate-generate-secret-key shipped with Weblate.

SECRET_KEY

Running maintenance tasks

For optimal performance, it is good idea to run some maintenance tasks in the background. This is now automatically done by celery and covers following tasks:

  • Configuration health check (hourly).
  • Committing pending changes (hourly), see lazy-commit and commit_pending.
  • Updating component alerts (daily).
  • Update remote branches (nightly), see AUTO_UPDATE.
  • Translation memory backup to JSON (daily), see dump_memory.
  • Fulltext and database maintenance tasks (daily and weekly tasks), see cleanuptrans.

3.2

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

System locales and encoding

The system locales should be configured to UTF-8 capable ones. On most Linux distributions this is the default setting. In case it is not the case on your system, please change locales to UTF-8 variant.

For example by editing /etc/default/locale and setting there LANG="C.UTF-8".

In some cases the individual services have separate configuration for locales. This varies between distribution and web servers, so check documentation of your web server packages for that.

Apache on Ubuntu uses /etc/apache2/envvars:

export LANG='en_US.UTF-8'
export LC_ALL='en_US.UTF-8'

Apache on CentOS uses /etc/sysconfig/httpd (or /opt/rh/httpd24/root/etc/sysconfig/httpd):

LANG='en_US.UTF-8'

Using custom certificate authority

Weblate does verify SSL certificates during HTTP requests. In case you are using custom certificate authority which is not trusted in default bundles, you will have to add its certificate as trusted.

The preferred approach is to do this at system level, please check your distro documentation for more details (for example on debian this can be done by placing the CA certificate into /usr/local/share/ca-certificates/ and running update-ca-certificates).

Once this is done, system tools will trust the certificate and this includes Git.

For Python code, you will need to configure requests to use system CA bundle instead of the one shipped with it. This can be achieved by placing following snippet to settings.py (the path is Debian specific):

import os

os.environ["REQUESTS_CA_BUNDLE"] = "/etc/ssl/certs/ca-certificates.crt"

Compressing client assets

Weblate comes with a bunch of JavaScript and CSS files. For performance reasons it is good to compress them before sending to a client. In default configuration this is done on the fly at cost of little overhead. On big installations, it is recommended to enable offline compression mode. This needs to be done in the configuration and the compression has to be triggered on every Weblate upgrade.

The configuration switch is simple by enabling compressor:django.conf.settings.COMPRESS_OFFLINE and configuring compressor:django.conf.settings.COMPRESS_OFFLINE_CONTEXT (the latter is already included in the example configuration):

COMPRESS_OFFLINE = True

On each deploy you need to compress the files to match current version:

weblate compress

Hint

The official Docker image has this feature already enabled.

compressor:scenarios, static-files

Running server

Hint

In case you are not experienced with services described below, you might want to try install/docker.

You will need several services to run Weblate, the recommended setup consists of:

  • Database server (see database-setup)
  • Cache server (see production-cache)
  • Frontend web server for static files and SSL termination (see static-files)
  • WSGI server for dynamic content (see uwsgi)
  • Celery for executing background tasks (see celery)

Note

There are some dependencies between the services, for example cache and database should be running when starting up Celery or uwsgi processes.

In most cases, you will run all services on single (virtual) server, but in case your installation is heavy loaded, you can split up the services. The only limitation on this is that Celery and Wsgi servers need access to DATA_DIR.

Note

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

See also file-permissions and celery.

Running web 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:

weblate runserver

Warning

DO NOT USE THIS SERVER IN A PRODUCTION SETTING. It has not gone through security audits or performance tests. See also Django documentation on django:runserver.

Hint

The Django built-in server serves static files only with DEBUG enabled as it is intended for development only. For production use, please see wsgi setups in uwsgi, apache, apache-gunicorn, and static-files.

Serving static files

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 weblate collectstatic --noinput. This will copy the static files into a directory specified by the django: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.

uwsgi, apache, apache-gunicorn, production-compress, django:howto/deployment/index, django:howto/static-files/deployment

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 its configuration, but this might need customization for your environment.

CSP_SCRIPT_SRC, CSP_IMG_SRC, CSP_CONNECT_SRC, CSP_STYLE_SRC, CSP_FONT_SRC

Sample configuration for NGINX and uWSGI

To run production webserver, use the wsgi wrapper installed with Weblate (in virtual env case it is installed as ~/weblate-env/lib/python3.9/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).

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

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

../../weblate/examples/weblate.nginx.conf

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

../../weblate/examples/weblate.uwsgi.ini

django:howto/deployment/wsgi/uwsgi

Sample configuration for Apache

It is recommended to use prefork MPM when using WSGI with Weblate.

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

../../weblate/examples/apache.conf

Note

Weblate requires Python 3, so please make sure you are running Python 3 variant of the modwsgi. Usually it is available as a separate package, for example libapache2-mod-wsgi-py3.

production-encoding, django:howto/deployment/wsgi/modwsgi

Sample configuration for Apache and Gunicorn

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

../../weblate/examples/apache.gunicorn.conf

django:howto/deployment/wsgi/gunicorn

Running Weblate under path

1.3

It is recommended to use prefork MPM when using WSGI with Weblate.

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

../../weblate/examples/apache-path.conf

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

URL_PREFIX = "/weblate"

Background tasks using Celery

3.2

Weblate uses Celery to execute regular and background tasks. You are supposed to run a Celery service that will execute these. For example, it is responsible for handling following operations (this list is not complete):

  • Receiving webhooks from external services (see hooks).
  • Running regular maintenance tasks such as backups, cleanups, daily add-ons, or updates (see backup, BACKGROUND_TASKS, addons).
  • Running auto-translation.
  • Sending digest notifications.
  • Offloading expensive operations from the wsgi process.
  • Committing pending changes (see lazy-commit).

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

Redis broker configuration in Celery <celery:broker-redis-configuration>

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):

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

Note

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

See also file-permissions and server.

Executing Celery tasks in the wsgi using eager mode

Note

This will have severe performance impact on the web interface, and will break features depending on regular trigger (for example committing pending changes, digest notifications, or backups).

For development, you might want to use eager configuration, which does process all tasks in place:

CELERY_TASK_ALWAYS_EAGER = True
CELERY_BROKER_URL = "memory://"
CELERY_TASK_EAGER_PROPAGATES = True

Running Celery as system service

Most likely you will want to run Celery as a daemon and that is covered by celery:userguide/daemonizing. 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:

../../weblate/examples/celery-weblate.service

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

../../weblate/examples/celery-weblate.conf

Additional configuration to rotate Celery logs using logrotate to be placed as /etc/logrotate.d/celery:

../../weblate/examples/celery-weblate.logrotate

Periodic tasks using Celery beat

Weblate comes with built-in setup for scheduled tasks. You can however define additional tasks in settings.py, for example see lazy-commit.

The tasks are supposed to be executed by Celery beats daemon. In case it is not working properly, it might not be running or its database was corrupted. Check the Celery startup logs in such case to figure out root cause.

Monitoring Celery status

You can find current length of the Celery task queues in the management-interface or you can use celery_queues on the command-line. In case the queue will get too long, you will also get configuration error in the admin interface.

Warning

The Celery errors are by default only logged into Celery log and are not visible to user. In case you want to have overview on such failures, it is recommended to configure collecting-errors.

monitoring, faq-monitoring, celery:userguide/configuration, celery:userguide/workers, celery:userguide/daemonizing, celery:userguide/monitoring, celery_queues

Monitoring Weblate

Weblate provides the /healthz/ URL to be used in simple health checks, for example using Kubernetes. The Docker container has built-in health check using this URL.

For monitoring metrics of Weblate you can use :http:get:/api/metrics/ API endpoint.

faq-monitoring, monitoring-celery, Weblate plugin for Munin

Collecting error reports

Weblate, as any other software, can fail. In order to collect useful failure states we recommend to use third party services to collect such information. This is especially useful in case of failing Celery tasks, which would otherwise only report error to the logs and you won't get notified on them. Weblate has support for the following services:

Sentry

Weblate has built-in support for Sentry. To use it, it's enough to set SENTRY_DSN in the settings.py:

SENTRY_DSN = "https://id@your.sentry.example.com/"

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": "main",
    "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 approach is to use database native tools, as they are usually the most effective (e.g. mysqldump or pg_dump). Alternatively you can use replication in case your database supports it.

Migrating between databases described in database-migration.

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.

Other notes

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