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Installation & Configuration
============================
Getting Started
---------------
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Superset has deprecated support for Python `` 2.* `` and supports
only `` ~=3.6 `` to take advantage of the newer Python features and reduce
the burden of supporting previous versions. We run our test suite
against `` 3.6 `` , but running on `` 3.7 `` **should** work as well.
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Cloud-native!
-------------
Superset is designed to be highly available. It is
"cloud-native" as it has been designed scale out in large,
distributed environments, and works well inside containers.
While you can easily
test drive Superset on a modest setup or simply on your laptop,
there's virtually no limit around scaling out the platform.
Superset is also cloud-native in the sense that it is
flexible and lets you choose your web server (Gunicorn, Nginx, Apache),
your metadata database engine (MySQL, Postgres, MariaDB, ...),
your message queue (Redis, RabbitMQ, SQS, ...),
your results backend (S3, Redis, Memcached, ...), your caching layer
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(Memcached, Redis, ...), works well with services like NewRelic, StatsD and
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DataDog, and has the ability to run analytic workloads against
most popular database technologies.
Superset is battle tested in large environments with hundreds
of concurrent users. Airbnb's production environment runs inside
Kubernetes and serves 600+ daily active users viewing over 100K charts a
day.
The Superset web server and the Superset Celery workers (optional)
are stateless, so you can scale out by running on as many servers
as needed.
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Init docker for local development environment. (#4193)
This commit will try to dockerize superset in local development
environment.
The basic design is:
- Enable superset, redis and postgres service instead of using sqlite,
just want to simulate production environment settings
- Use environment variables to config various app settings. It's easy to
run and config superset to any environment if we use environment than
traditional config files
- For local development environment, we just expose postgres and redis
to local host machine thus you can connect local port via `psql` or
`redis-cli`
- Wrap start up command in a standard `docker-entrypoint.sh`, and use
`tail -f /dev/null` combined with manually `superset runserver -d` to
make sure that code error didn't cause the container to fail.
- Use volumes to share code between host and container, thus you can use
your favourite tools to modify code and your code will run in
containerized environment
- Use volumes to persistent postgres and redis data, and also
`node_modules` data.
- If we don't cache `node_modules` in docker volume, then every time
run docker build, the `node_modules` directory, will is about 500 MB
large, will be sent to docker daemon, and make the build quite slow.
- Wrap initialization commands to a single script `docker-init.sh`
After this dockerize setup, any developers who want to contribute to
superset, just follow three easy steps:
```
git clone https://github.com/apache/incubator-superset/
cd incubator-superset
cp contrib/docker/{docker-build.sh,docker-compose.yml,docker-entrypoint.sh,docker-init.sh,Dockerfile} .
cp contrib/docker/superset_config.py superset/
bash -x docker-build.sh
docker-compose up -d
docker-compose exec superset bash
bash docker-init.sh
```
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Start with Docker
-----------------
If you know docker, then you're lucky, we have shortcut road for you to
initialize development environment: ::
git clone https://github.com/apache/incubator-superset/
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cd incubator-superset/contrib/docker
# prefix with SUPERSET_LOAD_EXAMPLES=yes to load examples:
docker-compose run --rm superset ./docker-init.sh
# you can run this command everytime you need to start superset now:
docker-compose up
Init docker for local development environment. (#4193)
This commit will try to dockerize superset in local development
environment.
The basic design is:
- Enable superset, redis and postgres service instead of using sqlite,
just want to simulate production environment settings
- Use environment variables to config various app settings. It's easy to
run and config superset to any environment if we use environment than
traditional config files
- For local development environment, we just expose postgres and redis
to local host machine thus you can connect local port via `psql` or
`redis-cli`
- Wrap start up command in a standard `docker-entrypoint.sh`, and use
`tail -f /dev/null` combined with manually `superset runserver -d` to
make sure that code error didn't cause the container to fail.
- Use volumes to share code between host and container, thus you can use
your favourite tools to modify code and your code will run in
containerized environment
- Use volumes to persistent postgres and redis data, and also
`node_modules` data.
- If we don't cache `node_modules` in docker volume, then every time
run docker build, the `node_modules` directory, will is about 500 MB
large, will be sent to docker daemon, and make the build quite slow.
- Wrap initialization commands to a single script `docker-init.sh`
After this dockerize setup, any developers who want to contribute to
superset, just follow three easy steps:
```
git clone https://github.com/apache/incubator-superset/
cd incubator-superset
cp contrib/docker/{docker-build.sh,docker-compose.yml,docker-entrypoint.sh,docker-init.sh,Dockerfile} .
cp contrib/docker/superset_config.py superset/
bash -x docker-build.sh
docker-compose up -d
docker-compose exec superset bash
bash docker-init.sh
```
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After several minutes for superset initialization to finish, you can open
Init docker for local development environment. (#4193)
This commit will try to dockerize superset in local development
environment.
The basic design is:
- Enable superset, redis and postgres service instead of using sqlite,
just want to simulate production environment settings
- Use environment variables to config various app settings. It's easy to
run and config superset to any environment if we use environment than
traditional config files
- For local development environment, we just expose postgres and redis
to local host machine thus you can connect local port via `psql` or
`redis-cli`
- Wrap start up command in a standard `docker-entrypoint.sh`, and use
`tail -f /dev/null` combined with manually `superset runserver -d` to
make sure that code error didn't cause the container to fail.
- Use volumes to share code between host and container, thus you can use
your favourite tools to modify code and your code will run in
containerized environment
- Use volumes to persistent postgres and redis data, and also
`node_modules` data.
- If we don't cache `node_modules` in docker volume, then every time
run docker build, the `node_modules` directory, will is about 500 MB
large, will be sent to docker daemon, and make the build quite slow.
- Wrap initialization commands to a single script `docker-init.sh`
After this dockerize setup, any developers who want to contribute to
superset, just follow three easy steps:
```
git clone https://github.com/apache/incubator-superset/
cd incubator-superset
cp contrib/docker/{docker-build.sh,docker-compose.yml,docker-entrypoint.sh,docker-init.sh,Dockerfile} .
cp contrib/docker/superset_config.py superset/
bash -x docker-build.sh
docker-compose up -d
docker-compose exec superset bash
bash docker-init.sh
```
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a browser and view `http://localhost:8088` to start your journey.
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From there, the container server will reload on modification of the superset python
and javascript source code.
Don't forget to reload the page to take the new frontend into account though.
See also `CONTRIBUTING.md <https://github.com/apache/incubator-superset/blob/master/CONTRIBUTING.md#webpack-dev-server> `_ ,
for alternative way of serving the frontend.
It is also possible to run Superset in non-development mode: in the `docker-compose.yml` file remove
the volumes needed for development and change the variable `SUPERSET_ENV` to `production` .
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If you are attempting to build on a Mac and it exits with 137 you need to increase your docker resources.
OSX instructions: https://docs.docker.com/docker-for-mac/#advanced (Search for memory)
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Or if you're curious and want to install superset from bottom up, then go ahead.
Init docker for local development environment. (#4193)
This commit will try to dockerize superset in local development
environment.
The basic design is:
- Enable superset, redis and postgres service instead of using sqlite,
just want to simulate production environment settings
- Use environment variables to config various app settings. It's easy to
run and config superset to any environment if we use environment than
traditional config files
- For local development environment, we just expose postgres and redis
to local host machine thus you can connect local port via `psql` or
`redis-cli`
- Wrap start up command in a standard `docker-entrypoint.sh`, and use
`tail -f /dev/null` combined with manually `superset runserver -d` to
make sure that code error didn't cause the container to fail.
- Use volumes to share code between host and container, thus you can use
your favourite tools to modify code and your code will run in
containerized environment
- Use volumes to persistent postgres and redis data, and also
`node_modules` data.
- If we don't cache `node_modules` in docker volume, then every time
run docker build, the `node_modules` directory, will is about 500 MB
large, will be sent to docker daemon, and make the build quite slow.
- Wrap initialization commands to a single script `docker-init.sh`
After this dockerize setup, any developers who want to contribute to
superset, just follow three easy steps:
```
git clone https://github.com/apache/incubator-superset/
cd incubator-superset
cp contrib/docker/{docker-build.sh,docker-compose.yml,docker-entrypoint.sh,docker-init.sh,Dockerfile} .
cp contrib/docker/superset_config.py superset/
bash -x docker-build.sh
docker-compose up -d
docker-compose exec superset bash
bash docker-init.sh
```
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OS dependencies
---------------
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Superset stores database connection information in its metadata database.
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For that purpose, we use the `` cryptography `` Python library to encrypt
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connection passwords. Unfortunately, this library has OS level dependencies.
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You may want to attempt the next step
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("Superset installation and initialization") and come back to this step if
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you encounter an error.
Here's how to install them:
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For **Debian** and **Ubuntu** , the following command will ensure that
the required dependencies are installed: ::
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sudo apt-get install build-essential libssl-dev libffi-dev python-dev python-pip libsasl2-dev libldap2-dev
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**Ubuntu 18.04** If you have python3.6 installed alongside with python2.7, as is default on **Ubuntu 18.04 LTS** , run this command also: ::
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sudo apt-get install build-essential libssl-dev libffi-dev python3.6-dev python-pip libsasl2-dev libldap2-dev
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otherwise build for `` cryptography `` fails.
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For **Fedora** and **RHEL-derivatives** , the following command will ensure
that the required dependencies are installed: ::
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sudo yum upgrade python-setuptools
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sudo yum install gcc gcc-c++ libffi-devel python-devel python-pip python-wheel openssl-devel libsasl2-devel openldap-devel
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**OSX** , system python is not recommended. brew's python also ships with pip ::
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brew install pkg-config libffi openssl python
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env LDFLAGS="-L$(brew --prefix openssl)/lib" CFLAGS="-I$(brew --prefix openssl)/include" pip install cryptography==1.9
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**Windows** isn't officially supported at this point, but if you want to
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attempt it, download `get-pip.py <https://bootstrap.pypa.io/get-pip.py> `_ , and run `` python get-pip.py `` which may need admin access. Then run the following: ::
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C:\> pip install cryptography
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# You may also have to create C:\Temp
C:\> md C:\Temp
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Python virtualenv
-----------------
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It is recommended to install Superset inside a virtualenv. Python 3 already ships virtualenv.
But if it's not installed in your environment for some reason, you can install it
via the package for your operating systems, otherwise you can install from pip: ::
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pip install virtualenv
You can create and activate a virtualenv by: ::
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# virtualenv is shipped in Python 3.6+ as venv instead of pyvenv.
# See https://docs.python.org/3.6/library/venv.html
python3 -m venv venv
. venv/bin/activate
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On windows the syntax for activating it is a bit different: ::
venv\Scripts\activate
Once you activated your virtualenv everything you are doing is confined inside the virtualenv.
To exit a virtualenv just type `` deactivate `` .
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Python's setup tools and pip
----------------------------
Put all the chances on your side by getting the very latest `` pip ``
and `` setuptools `` libraries.::
pip install --upgrade setuptools pip
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Superset installation and initialization
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----------------------------------------
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Follow these few simple steps to install Superset.::
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# Install superset
pip install superset
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# Create an admin user (you will be prompted to set a username, first and last name before setting a password)
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fabmanager create-admin --app superset
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# Initialize the database
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superset db upgrade
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# Load some data to play with
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superset load_examples
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# Create default roles and permissions
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superset init
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# To start a development web server on port 8088, use -p to bind to another port
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superset runserver -d
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After installation, you should be able to point your browser to the right
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hostname:port `http://localhost:8088 <http://localhost:8088> `_ , login using
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the credential you entered while creating the admin account, and navigate to
`Menu -> Admin -> Refresh Metadata` . This action should bring in all of
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your datasources for Superset to be aware of, and they should show up in
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`Menu -> Datasources` , from where you can start playing with your data!
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A proper WSGI HTTP Server
-------------------------
While you can setup Superset to run on Nginx or Apache, many use
Gunicorn, preferably in **async mode** , which allows for impressive
concurrency even and is fairly easy to install and configure. Please
refer to the
documentation of your preferred technology to set up this Flask WSGI
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application in a way that works well in your environment. Here's an **async**
setup known to work well in production: ::
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gunicorn \
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-w 10 \
-k gevent \
--timeout 120 \
-b 0.0.0.0:6666 \
--limit-request-line 0 \
--limit-request-field_size 0 \
--statsd-host localhost:8125 \
superset:app
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Refer to the
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`Gunicorn documentation <http://docs.gunicorn.org/en/stable/design.html> `_
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for more information.
Note that *gunicorn* does not
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work on Windows so the `superset runserver` command is not expected to work
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in that context. Also, note that the development web
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server (`superset runserver -d` ) is not intended for production use.
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If not using gunicorn, you may want to disable the use of flask-compress
by setting `ENABLE_FLASK_COMPRESS = False` in your `superset_config.py`
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Flask-AppBuilder Permissions
----------------------------
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By default, every time the Flask-AppBuilder (FAB) app is initialized the
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permissions and views are added automatically to the backend and associated with
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the ‘ Admin’ role. The issue, however, is when you are running multiple concurrent
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workers this creates a lot of contention and race conditions when defining
permissions and views.
To alleviate this issue, the automatic updating of permissions can be disabled
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by setting the environment variable
`SUPERSET_UPDATE_PERMS` environment variable to `0` .
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The value `1` enables it, `0` disables it. Note if undefined the functionality
is enabled to maintain backwards compatibility.
In a production environment initialization could take on the following form:
export SUPERSET_UPDATE_PERMS=1
superset init
export SUPERSET_UPDATE_PERMS=0
gunicorn -w 10 ... superset:app
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Configuration behind a load balancer
------------------------------------
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If you are running superset behind a load balancer or reverse proxy (e.g. NGINX
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or ELB on AWS), you may need to utilise a healthcheck endpoint so that your
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load balancer knows if your superset instance is running. This is provided
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at `` /health `` which will return a 200 response containing "OK" if the
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the webserver is running.
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If the load balancer is inserting X-Forwarded-For/X-Forwarded-Proto headers, you
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should set `ENABLE_PROXY_FIX = True` in the superset config file to extract and use
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the headers.
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In case that the reverse proxy is used for providing ssl encryption,
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an explicit definition of the `X-Forwarded-Proto` may be required.
For the Apache webserver this can be set as follows: ::
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RequestHeader set X-Forwarded-Proto "https"
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Configuration
-------------
To configure your application, you need to create a file (module)
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`` superset_config.py `` and make sure it is in your PYTHONPATH. Here are some
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of the parameters you can copy / paste in that configuration module: ::
#---------------------------------------------------------
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# Superset specific config
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#---------------------------------------------------------
ROW_LIMIT = 5000
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SUPERSET_WEBSERVER_PORT = 8088
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#---------------------------------------------------------
#---------------------------------------------------------
# Flask App Builder configuration
#---------------------------------------------------------
# Your App secret key
SECRET_KEY = '\2\1thisismyscretkey\1\2\e\y\y\h'
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# The SQLAlchemy connection string to your database backend
# This connection defines the path to the database that stores your
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# superset metadata (slices, connections, tables, dashboards, ...).
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# Note that the connection information to connect to the datasources
# you want to explore are managed directly in the web UI
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SQLALCHEMY_DATABASE_URI = 'sqlite:////path/to/superset.db'
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# Flask-WTF flag for CSRF
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WTF_CSRF_ENABLED = True
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# Add endpoints that need to be exempt from CSRF protection
WTF_CSRF_EXEMPT_LIST = []
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# A CSRF token that expires in 1 year
WTF_CSRF_TIME_LIMIT = 60 * 60 * 24 * 365
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# Set this API key to enable Mapbox visualizations
MAPBOX_API_KEY = ''
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All the parameters and default values defined in
https://github.com/apache/incubator-superset/blob/master/superset/config.py
can be altered in your local `` superset_config.py `` .
Administrators will want to
read through the file to understand what can be configured locally
as well as the default values in place.
Since `` superset_config.py `` acts as a Flask configuration module, it
can be used to alter the settings Flask itself,
as well as Flask extensions like `` flask-wtf `` , `` flask-cache `` ,
`` flask-migrate `` , and `` flask-appbuilder `` . Flask App Builder, the web
framework used by Superset offers many configuration settings. Please consult
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the `Flask App Builder Documentation
<http://flask-appbuilder.readthedocs.org/en/latest/config.html> `_
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for more information on how to configure it.
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Make sure to change:
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* *SQLALCHEMY_DATABASE_URI* , by default it is stored at *~/.superset/superset.db*
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* *SECRET_KEY* , to a long random string
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In case you need to exempt endpoints from CSRF, e.g. you are running a custom
auth postback endpoint, you can add them to *WTF_CSRF_EXEMPT_LIST*
WTF_CSRF_EXEMPT_LIST = ['']
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.. _ref_database_deps:
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Database dependencies
---------------------
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Superset does not ship bundled with connectivity to databases, except
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for Sqlite, which is part of the Python standard library.
You'll need to install the required packages for the database you
want to use as your metadata database as well as the packages needed to
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connect to the databases you want to access through Superset.
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Here's a list of some of the recommended packages.
+---------------+-------------------------------------+-------------------------------------------------+
| database | pypi package | SQLAlchemy URI prefix |
+===============+=====================================+=================================================+
| MySQL | `` pip install mysqlclient `` | `` mysql:// `` |
+---------------+-------------------------------------+-------------------------------------------------+
| Postgres | `` pip install psycopg2 `` | `` postgresql+psycopg2:// `` |
+---------------+-------------------------------------+-------------------------------------------------+
| Presto | `` pip install pyhive `` | `` presto:// `` |
+---------------+-------------------------------------+-------------------------------------------------+
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| Hive | `` pip install pyhive `` | `` hive:// `` |
+---------------+-------------------------------------+-------------------------------------------------+
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| Oracle | `` pip install cx_Oracle `` | `` oracle:// `` |
+---------------+-------------------------------------+-------------------------------------------------+
| sqlite | | `` sqlite:// `` |
+---------------+-------------------------------------+-------------------------------------------------+
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| Snowflake | `` pip install snowflake-sqlalchemy ` ` | ` ` snowflake:// `` |
+---------------+-------------------------------------+-------------------------------------------------+
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| Redshift | `` pip install sqlalchemy-redshift `` | `` redshift+psycopg2:// `` |
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+---------------+-------------------------------------+-------------------------------------------------+
| MSSQL | `` pip install pymssql `` | `` mssql:// `` |
+---------------+-------------------------------------+-------------------------------------------------+
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| Impala | `` pip install impyla `` | `` impala:// `` |
+---------------+-------------------------------------+-------------------------------------------------+
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| SparkSQL | `` pip install pyhive `` | `` jdbc+hive:// `` |
+---------------+-------------------------------------+-------------------------------------------------+
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| Greenplum | `` pip install psycopg2 `` | `` postgresql+psycopg2:// `` |
+---------------+-------------------------------------+-------------------------------------------------+
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| Athena | `` pip install "PyAthenaJDBC>1.0.9" ` ` | ` ` awsathena+jdbc:// `` |
+---------------+-------------------------------------+-------------------------------------------------+
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| Athena | `` pip install "PyAthena>1.2.0" `` | `` awsathena+rest:// `` |
+---------------+-------------------------------------+-------------------------------------------------+
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| Vertica | `` pip install | ` ` vertica+vertica_python:// `` |
| | sqlalchemy-vertica-python`` | |
+---------------+-------------------------------------+-------------------------------------------------+
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| ClickHouse | `` pip install | ` ` clickhouse:// `` |
| | sqlalchemy-clickhouse`` | |
+---------------+-------------------------------------+-------------------------------------------------+
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| Kylin | `` pip install kylinpy `` | `` kylin:// `` |
+---------------+-------------------------------------+-------------------------------------------------+
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| BigQuery | `` pip install pybigquery `` | `` bigquery:// `` |
+---------------+-------------------------------------+-------------------------------------------------+
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| Teradata | `` pip install sqlalchemy-teradata `` | `` teradata:// `` |
+---------------+-------------------------------------+-------------------------------------------------+
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Note that many other databases are supported, the main criteria being the
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existence of a functional SqlAlchemy dialect and Python driver. Googling
the keyword `` sqlalchemy `` in addition of a keyword that describes the
database you want to connect to should get you to the right place.
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(AWS) Athena
------------
The connection string for Athena looks like this ::
awsathena+jdbc://{aws_access_key_id}:{aws_secret_access_key}@athena.{region_name}.amazonaws.com/{schema_name}?s3_staging_dir={s3_staging_dir}&...
Where you need to escape/encode at least the s3_staging_dir, i.e., ::
s3://... -> s3%3A//...
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You can also use `PyAthena` library(no java required) like this ::
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awsathena+rest://{aws_access_key_id}:{aws_secret_access_key}@athena.{region_name}.amazonaws.com/{schema_name}?s3_staging_dir={s3_staging_dir}&...
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See `PyAthena <https://github.com/laughingman7743/PyAthena#sqlalchemy> `_ .
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Snowflake
---------
The connection string for Snowflake looks like this ::
snowflake://{user}:{password}@{account}.{region}/{database}?role={role}&warehouse={warehouse}
The schema is not necessary in the connection string, as it is defined per table/query.
The role and warehouse can be omitted if defaults are defined for the user, i.e.
snowflake://{user}:{password}@{account}.{region}/{database}
Make sure the user has privileges to access and use all required
databases/schemas/tables/views/warehouses, as the Snowflake SQLAlchemy engine does
not test for user rights during engine creation.
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*Note* : At the time of writing, there is a regression in the current stable version (1.1.2) of
snowflake-sqlalchemy package that causes problems when used with Superset. It is recommended to
use version 1.1.0 or try a newer version.
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See `Snowflake SQLAlchemy <https://github.com/snowflakedb/snowflake-sqlalchemy> `_ .
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Teradata
---------
The connection string for Teradata looks like this ::
teradata://{user}:{password}@{host}
*Note* : Its required to have Teradata ODBC drivers installed and environment variables configured for proper work of sqlalchemy dialect. Teradata ODBC Drivers available here: https://downloads.teradata.com/download/connectivity/odbc-driver/linux
Required environment variables: ::
export ODBCINI=/.../teradata/client/ODBC_64/odbc.ini
export ODBCINST=/.../teradata/client/ODBC_64/odbcinst.ini
See `Teradata SQLAlchemy <https://github.com/Teradata/sqlalchemy-teradata> `_ .
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Caching
-------
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Superset uses `Flask-Cache <https://pythonhosted.org/Flask-Cache/> `_ for
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caching purpose. Configuring your caching backend is as easy as providing
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a `` CACHE_CONFIG `` , constant in your `` superset_config.py `` that
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complies with the Flask-Cache specifications.
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Flask-Cache supports multiple caching backends (Redis, Memcached,
SimpleCache (in-memory), or the local filesystem). If you are going to use
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Memcached please use the `pylibmc` client library as `python-memcached` does
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not handle storing binary data correctly. If you use Redis, please install
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the `redis <https://pypi.python.org/pypi/redis> `_ Python package: ::
pip install redis
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For setting your timeouts, this is done in the Superset metadata and goes
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up the "timeout searchpath", from your slice configuration, to your
data source's configuration, to your database's and ultimately falls back
into your global default defined in `` CACHE_CONFIG `` .
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.. code-block :: python
CACHE_CONFIG = {
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'CACHE_TYPE': 'redis',
'CACHE_DEFAULT_TIMEOUT': 60 * 60 * 24, # 1 day default (in secs)
'CACHE_KEY_PREFIX': 'superset_results',
'CACHE_REDIS_URL': 'redis://localhost:6379/0',
}
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Deeper SQLAlchemy integration
-----------------------------
It is possible to tweak the database connection information using the
parameters exposed by SQLAlchemy. In the `` Database `` edit view, you will
find an `` extra `` field as a `` JSON `` blob.
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.. image :: images/tutorial/add_db.png
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:scale: 30 %
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This JSON string contains extra configuration elements. The `` engine_params ``
object gets unpacked into the
`sqlalchemy.create_engine <http://docs.sqlalchemy.org/en/latest/core/engines.html#sqlalchemy.create_engine> `_ call,
while the `` metadata_params `` get unpacked into the
`sqlalchemy.MetaData <http://docs.sqlalchemy.org/en/rel_1_0/core/metadata.html#sqlalchemy.schema.MetaData> `_ call. Refer to the SQLAlchemy docs for more information.
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Schemas (Postgres & Redshift)
-----------------------------
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Postgres and Redshift, as well as other databases,
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use the concept of **schema** as a logical entity
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on top of the **database** . For Superset to connect to a specific schema,
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there's a **schema** parameter you can set in the table form.
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External Password store for SQLAlchemy connections
--------------------------------------------------
It is possible to use an external store for you database passwords. This is
useful if you a running a custom secret distribution framework and do not wish
to store secrets in Superset's meta database.
Example:
Write a function that takes a single argument of type `` sqla.engine.url `` and returns
the password for the given connection string. Then set `` SQLALCHEMY_CUSTOM_PASSWORD_STORE ``
in your config file to point to that function. ::
def example_lookup_password(url):
secret = <<get password from external framework>>
return 'secret'
SQLALCHEMY_CUSTOM_PASSWORD_STORE = example_lookup_password
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A common pattern is to use environment variables to make secrets available.
`` SQLALCHEMY_CUSTOM_PASSWORD_STORE `` can also be used for that purpose. ::
def example_password_as_env_var(url):
# assuming the uri looks like
# mysql://localhost?superset_user:{SUPERSET_PASSWORD}
return url.password.format(os.environ)
SQLALCHEMY_CUSTOM_PASSWORD_STORE = example_password_as_env_var
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SSL Access to databases
-----------------------
This example worked with a MySQL database that requires SSL. The configuration
may differ with other backends. This is what was put in the `` extra ``
parameter ::
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{
"metadata_params": {},
"engine_params": {
"connect_args":{
"sslmode":"require",
"sslrootcert": "/path/to/my/pem"
}
}
}
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Druid
-----
* From the UI, enter the information about your clusters in the
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`Sources -> Druid Clusters` menu by hitting the + sign.
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* Once the Druid cluster connection information is entered, hit the
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`Sources -> Refresh Druid Metadata` menu item to populate
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* Navigate to your datasources
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Note that you can run the `` superset refresh_druid `` command to refresh the
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metadata from your Druid cluster(s)
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CORS
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----
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The extra CORS Dependency must be installed:
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superset[cors]
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The following keys in `superset_config.py` can be specified to configure CORS:
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* `` ENABLE_CORS `` : Must be set to True in order to enable CORS
* `` CORS_OPTIONS `` : options passed to Flask-CORS (`documentation <http://flask-cors.corydolphin.com/en/latest/api.html#extension>` )
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DOMAIN SHARDING
---------------
Chrome allows up to 6 open connections per domain at a time. When there are more
than 6 slices in dashboard, a lot of time fetch requests are queued up and wait for
next available socket. PR (`#5039 <https://github.com/apache/incubator-superset/pull/5039>` ) adds domain sharding to Superset,
and this feature will be enabled by configuration only (by default Superset
doesn't allow cross-domain request).
*`` SUPERSET_WEBSERVER_DOMAINS `` : list of allowed hostnames for domain sharding feature. default `None`
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MIDDLEWARE
----------
Superset allows you to add your own middleware. To add your own middleware, update the `` ADDITIONAL_MIDDLEWARE `` key in
your `superset_config.py` . `` ADDITIONAL_MIDDLEWARE `` should be a list of your additional middleware classes.
For example, to use AUTH_REMOTE_USER from behind a proxy server like nginx, you have to add a simple middleware class to
add the value of `` HTTP_X_PROXY_REMOTE_USER `` (or any other custom header from the proxy) to Gunicorn's `` REMOTE_USER ``
environment variable: ::
class RemoteUserMiddleware(object):
def __init__(self, app):
self.app = app
def __call__(self, environ, start_response):
user = environ.pop('HTTP_X_PROXY_REMOTE_USER', None)
environ['REMOTE_USER'] = user
return self.app(environ, start_response)
ADDITIONAL_MIDDLEWARE = [RemoteUserMiddleware, ]
*Adapted from http://flask.pocoo.org/snippets/69/*
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Upgrading
---------
Upgrading should be as straightforward as running::
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pip install superset --upgrade
superset db upgrade
superset init
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Celery Tasks
------------
On large analytic databases, it's common to run background jobs, reports
and/or queries that execute for minutes or hours. In certain cases, we need
to support long running tasks that execute beyond the typical web request's
timeout (30-60 seconds).
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On large analytic databases, it's common to run queries that
execute for minutes or hours.
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To enable support for long running queries that
execute beyond the typical web request's timeout (30-60 seconds), it is
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necessary to configure an asynchronous backend for Superset which consists of:
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* one or many Superset workers (which is implemented as a Celery worker), and
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can be started with the `` celery worker `` command, run
`` celery worker --help `` to view the related options.
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* a celery broker (message queue) for which we recommend using Redis
or RabbitMQ
* a results backend that defines where the worker will persist the query
results
Configuring Celery requires defining a `` CELERY_CONFIG `` in your
`` superset_config.py `` . Both the worker and web server processes should
have the same configuration.
.. code-block :: python
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class CeleryConfig(object):
BROKER_URL = 'redis://localhost:6379/0'
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CELERY_IMPORTS = (
'superset.sql_lab',
'superset.tasks',
)
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CELERY_RESULT_BACKEND = 'redis://localhost:6379/0'
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CELERYD_LOG_LEVEL = 'DEBUG'
CELERYD_PREFETCH_MULTIPLIER = 10
CELERY_ACKS_LATE = True
CELERY_ANNOTATIONS = {
'sql_lab.get_sql_results': {
'rate_limit': '100/s',
},
'email_reports.send': {
'rate_limit': '1/s',
'time_limit': 120,
'soft_time_limit': 150,
'ignore_result': True,
},
}
CELERYBEAT_SCHEDULE = {
'email_reports.schedule_hourly': {
'task': 'email_reports.schedule_hourly',
'schedule': crontab(minute=1, hour='*'),
},
}
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CELERY_CONFIG = CeleryConfig
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* To start a Celery worker to leverage the configuration run: ::
celery worker --app=superset.tasks.celery_app:app --pool=prefork -Ofair -c 4
* To start a job which schedules periodic background jobs, run ::
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celery beat --app=superset.tasks.celery_app:app
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To setup a result backend, you need to pass an instance of a derivative
of `` werkzeug.contrib.cache.BaseCache `` to the `` RESULTS_BACKEND ``
configuration key in your `` superset_config.py `` . It's possible to use
Memcached, Redis, S3 (https://pypi.python.org/pypi/s3werkzeugcache),
memory or the file system (in a single server-type setup or for testing),
or to write your own caching interface. Your `` superset_config.py `` may
look something like:
.. code-block :: python
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# On S3
from s3cache.s3cache import S3Cache
S3_CACHE_BUCKET = 'foobar-superset'
S3_CACHE_KEY_PREFIX = 'sql_lab_result'
RESULTS_BACKEND = S3Cache(S3_CACHE_BUCKET, S3_CACHE_KEY_PREFIX)
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# On Redis
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from werkzeug.contrib.cache import RedisCache
RESULTS_BACKEND = RedisCache(
host='localhost', port=6379, key_prefix='superset_results')
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**Important notes**
* It is important that all the worker nodes and web servers in
the Superset cluster share a common metadata database.
This means that SQLite will not work in this context since it has
limited support for concurrency and
typically lives on the local file system.
* There should only be one instance of `` celery beat `` running in your
entire setup. If not, background jobs can get scheduled multiple times
resulting in weird behaviors like duplicate delivery of reports,
higher than expected load / traffic etc.
Email Reports
-------------
Email reports allow users to schedule email reports for
* slice and dashboard visualization (Attachment or inline)
* slice data (CSV attachment on inline table)
Schedules are defined in crontab format and each schedule
can have a list of recipients (all of them can receive a single mail,
or separate mails). For audit purposes, all outgoing mails can have a
mandatory bcc.
**Requirements**
* A selenium compatible driver & headless browser
* `geckodriver <https://github.com/mozilla/geckodriver> `_ and Firefox is preferred
* `chromedriver <http://chromedriver.chromium.org/> `_ is a good option too
* Run `celery worker` and `celery beat` as follows ::
celery worker --app=superset.tasks.celery_app:app --pool=prefork -Ofair -c 4
celery beat --app=superset.tasks.celery_app:app
**Important notes**
* Be mindful of the concurrency setting for celery (using `` -c 4 `` ).
Selenium/webdriver instances can consume a lot of CPU / memory on your servers.
* In some cases, if you notice a lot of leaked `` geckodriver `` processes, try running
your celery processes with ::
celery worker --pool=prefork --max-tasks-per-child=128 ...
* It is recommended to run separate workers for `` sql_lab `` and
`` email_reports `` tasks. Can be done by using `` queue `` field in `` CELERY_ANNOTATIONS ``
SQL Lab
-------
SQL Lab is a powerful SQL IDE that works with all SQLAlchemy compatible
databases. By default, queries are executed in the scope of a web
request so they may eventually timeout as queries exceed the maximum duration of a web
request in your environment, whether it'd be a reverse proxy or the Superset
server itself. In such cases, it is preferred to use `` celery `` to run the queries
in the background. Please follow the examples/notes mentioned above to get your
celery setup working.
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Also note that SQL Lab supports Jinja templating in queries and that it's
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possible to overload
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the default Jinja context in your environment by defining the
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`` JINJA_CONTEXT_ADDONS `` in your superset configuration. Objects referenced
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in this dictionary are made available for users to use in their SQL.
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.. code-block :: python
JINJA_CONTEXT_ADDONS = {
'my_crazy_macro': lambda x: x*2,
}
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Celery Flower
-------------
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Flower is a web based tool for monitoring the Celery cluster which you can
install from pip: ::
pip install flower
and run via: ::
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celery flower --app=superset.tasks.celery_app:app
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Building from source
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---------------------
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More advanced users may want to build Superset from sources. That
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would be the case if you fork the project to add features specific to
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your environment. See `CONTRIBUTING.md <https://github.com/apache/incubator-superset/blob/master/CONTRIBUTING.md#local-development> `_ .
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Blueprints
----------
`Blueprints are Flask's reusable apps <http://flask.pocoo.org/docs/0.12/blueprints/> `_ .
Superset allows you to specify an array of Blueprints
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in your `` superset_config `` module. Here's
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an example of how this can work with a simple Blueprint. By doing
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so, you can expect Superset to serve a page that says "OK"
at the `` /simple_page `` url. This can allow you to run other things such
as custom data visualization applications alongside Superset, on the
same server.
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.. code-block :: python
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from flask import Blueprint
simple_page = Blueprint('simple_page', __name__,
template_folder='templates')
@simple_page.route('/', defaults={'page': 'index'})
@simple_page.route('/<page>')
def show(page):
return "Ok"
BLUEPRINTS = [simple_page]
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StatsD logging
--------------
Superset is instrumented to log events to StatsD if desired. Most endpoints hit
are logged as well as key events like query start and end in SQL Lab.
To setup StatsD logging, it's a matter of configuring the logger in your
`` superset_config.py `` .
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.. code-block :: python
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from superset.stats_logger import StatsdStatsLogger
STATS_LOGGER = StatsdStatsLogger(host='localhost', port=8125, prefix='superset')
Note that it's also possible to implement you own logger by deriving
`` superset.stats_logger.BaseStatsLogger `` .
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Install Superset with helm in Kubernetes
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----------------------------------------
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You can install Superset into Kubernetes with Helm <https://helm.sh/>. The chart is
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located in `` install/helm `` .
To install Superset into your Kubernetes:
.. code-block :: bash
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helm upgrade --install superset ./install/helm/superset
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Note that the above command will install Superset into `` default `` namespace of your Kubernetes cluster.
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Custom OAuth2 configuration
---------------------------
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Beyond FAB supported providers (github, twitter, linkedin, google, azure), its easy to connect Superset with other OAuth2 Authorization Server implementations that support "code" authorization.
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The first step: Configure authorization in Superset `` superset_config.py `` .
.. code-block :: python
AUTH_TYPE = AUTH_OAUTH
OAUTH_PROVIDERS = [
{ 'name':'egaSSO',
'token_key':'access_token', # Name of the token in the response of access_token_url
'icon':'fa-address-card', # Icon for the provider
'remote_app': {
'consumer_key':'myClientId', # Client Id (Identify Superset application)
'consumer_secret':'MySecret', # Secret for this Client Id (Identify Superset application)
'request_token_params':{
'scope': 'read' # Scope for the Authorization
},
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'access_token_method':'POST', # HTTP Method to call access_token_url
'access_token_params':{ # Additional parameters for calls to access_token_url
'client_id':'myClientId'
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},
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'access_token_headers':{ # Additional headers for calls to access_token_url
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'Authorization': 'Basic Base64EncodedClientIdAndSecret'
},
'base_url':'https://myAuthorizationServer/oauth2AuthorizationServer/',
'access_token_url':'https://myAuthorizationServer/oauth2AuthorizationServer/token',
'authorize_url':'https://myAuthorizationServer/oauth2AuthorizationServer/authorize'
}
}
]
# Will allow user self registration, allowing to create Flask users from Authorized User
AUTH_USER_REGISTRATION = True
# The default user self registration role
AUTH_USER_REGISTRATION_ROLE = "Public"
Second step: Create a `CustomSsoSecurityManager` that extends `SupersetSecurityManager` and overrides `oauth_user_info` :
.. code-block :: python
from superset.security import SupersetSecurityManager
class CustomSsoSecurityManager(SupersetSecurityManager):
def oauth_user_info(self, provider, response=None):
logging.debug("Oauth2 provider: {0}.".format(provider))
if provider == 'egaSSO':
# As example, this line request a GET to base_url + '/' + userDetails with Bearer Authentication,
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# and expects that authorization server checks the token, and response with user details
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me = self.appbuilder.sm.oauth_remotes[provider].get('userDetails').data
logging.debug("user_data: {0}".format(me))
return { 'name' : me['name'], 'email' : me['email'], 'id' : me['user_name'], 'username' : me['user_name'], 'first_name':'', 'last_name':''}
2018-10-31 16:31:11 -04:00
...
2018-06-19 11:48:48 -04:00
This file must be located at the same directory than `` superset_config.py `` with the name `` custom_sso_security_manager.py `` .
Then we can add this two lines to `` superset_config.py `` :
.. code-block :: python
from custom_sso_security_manager import CustomSsoSecurityManager
CUSTOM_SECURITY_MANAGER = CustomSsoSecurityManager