QFieldCloud

QFieldCloud is a Django based service designed to synchronize projects and data between QGIS (+ QFieldSync plugin) and QField.

QFieldCloud allows seamless synchronization of your field data with your spatial infrastructure with change tracking, team management and online-offline work capabilities in QField.

Hosted solution

If you're interested in quickly getting up and running, we suggest subscribing to the version hosted by OPENGIS.ch at https://qfield.cloud. This is also the instance that is integrated by default into QField.

Documentation

QField and QFieldCloud documentation is deployed here.

Development

Clone the repository

Clone the repository and all its submodules:

git clone --recurse-submodules [email protected]:opengisch/qfieldcloud.git

To fetch upstream development, don't forget to update the submodules too:

git pull --recurse-submodules  && git submodule update --recursive

Launch a local instance

Copy the .env.example into .env file and configure it to your desire with a good editor:

cp .env.example .env
emacs .env

To build development images and run the containers:

docker compose up -d --build

It will read the docker-compose*.yml files specified in the COMPOSE_FILE variable and start a django built-in server at http://localhost:8011.

Run the django database migrations.

docker compose exec app python manage.py migrate

And collect the static files (CSS, JS etc):

docker compose run app python manage.py collectstatic --noinput

You can check if everything seems to work correctly using the status command:

docker compose exec app python manage.py status

Now you can get started by adding the first user that would also be a super user:

docker compose run app python manage.py createsuperuser --username super_user --email [email protected]

Tests

To run all the unit and functional tests (on a throwaway test database and a throwaway test storage directory):

export COMPOSE_FILE=docker-compose.yml:docker-compose.override.local.yml:docker-compose.override.test.yml
# (Re-)build the app service to install necessary test utilities (requirements_test.txt)
docker compose up -d --build
docker compose run app python manage.py migrate
docker compose run app python manage.py test --keepdb

To run only a test module (e.g. test_permission.py)

docker compose run app python manage.py test --keepdb qfieldcloud.core.tests.test_permission

Debugging

This section gives examples for VSCode, please adapt to your IDE)

If you are using the provided docker-compose.override.local.yml, then debugpy is automatically installed and configured for use.

Add the following to your IDE to connect (example given for VSCode's .vscode/launch.json, triggered with F5):

{
    "version": "0.2.0",
    "configurations": [
        {
            "name": "QFC debug app",
            "type": "python",
            "request": "attach",
            "justMyCode": false,
            "connect": {"host": "localhost", "port": 5678},
            "pathMappings": [
                {
                    "localRoot": "${workspaceFolder}/docker-app/qfieldcloud",
                    "remoteRoot": "/usr/src/app/qfieldcloud"
                },
                {
                    "localRoot": "${workspaceFolder}/docker-app/site-packages",
                    "remoteRoot": "/usr/local/lib/python3.10/site-packages/"
                },
            ],
        },
        {
            "name": "QFC debug worker_wrapper",
            "type": "python",
            "request": "attach",
            "justMyCode": false,
            "connect": {"host": "localhost", "port": 5679},
            "pathMappings": [
                {
                    "localRoot": "${workspaceFolder}/docker-app/qfieldcloud",
                    "remoteRoot": "/usr/src/app/qfieldcloud"
                },
                {
                    "localRoot": "${workspaceFolder}/docker-app/site-packages",
                    "remoteRoot": "/usr/local/lib/python3.10/site-packages/"
                },
            ],
        }
    ]
}

To add breakpoints in vendor modules installed via pip or apt, you need a copy of their source code. The easiest way to achieve that is do actual copy of them:

docker compose cp app:/usr/local/lib/python3.10/site-packages/ docker-app/site-packages

The configuration for the vendor modules is the second object in the example pathMappings above, as well as setting justMyCode to false.

Do not forget to copy the site packages every time any of the requirements.txt files are changed!

If you are not using docker-compose.override.local.yml, there are other options.

You can debug interactively by adding this snippet anywhere in the code.

import debugpy
debugpy.listen(("0.0.0.0", 5680))
print("debugpy waiting for debugger... 🐛")
debugpy.wait_for_client()  # optional

Or alternativley, prefix your commands with python -m debugpy --listen 0.0.0.0:5680 --wait-for-client.

docker compose run -p 5680:5680 app python -m debugpy --listen 0.0.0.0:5680 --wait-for-client manage.py test
docker compose run -p 5681:5681 worker_wrapper python -m debugpy --listen 0.0.0.0:5681 --wait-for-client manage.py test

Note if you run tests using the docker-compose.test.yml configuration, the app and worker-wrapper containers expose ports 5680 and 5681 respectively.

Add root certificate

QFieldCloud will automatically generate a certificate and it's root certificate in ./config/nginx/certs. However, you need to trust the root certificate first, so other programs (e.g. curl) can create secure connection to the local QFieldCloud instance.

On Debian/Ubuntu, copy the root certificate to the directory with trusted certificates. Note the extension has been changed to .crt:

sudo cp ./conf/nginx/certs/rootCA.pem /usr/local/share/ca-certificates/rootCA.crt

Trust the newly added certificate:

sudo update-ca-certificates

Connecting with curl should return no errors: curl https://localhost:8002/

Remove the root certificate

If you want to remove or change the root certificate, you need to remove the root certificate file and refresh the list of certificates:

sudo rm /usr/local/share/ca-certificates/rootCA.crt
sudo update-ca-certificates --fresh

Now connecting with curl should fail with a similar error:

$ curl https://localhost:8002/

curl: (60) SSL certificate problem: unable to get local issuer certificate
More details here: https://curl.haxx.se/docs/sslcerts.html

curl failed to verify the legitimacy of the server and therefore could not
establish a secure connection to it. To learn more about this situation and
how to fix it, please visit the web page mentioned above.

Code style

Code style done with precommit

pip install pre-commit
# install pre-commit hook
pre-commit install

Deployment

Launch a server instance

Copy the .env.example into .env file and configure it to your desire with a good editor

cp .env.example .env
emacs .env

Do not forget to set DEBUG=0 and to adapt COMPOSE_FILE to not load local development configurations.

Create the directory for qfieldcloud logs and supervisor socket file

mkdir /var/local/qfieldcloud

Run and build the docker containers

docker compose up -d --build

Run the django database migrations

docker compose exec app python manage.py migrate

Create or renew a certificate using Let's Encrypt

If you are running the server on a server with a public domain, you can install Let's Encrypt certificate by running the following command:

./scripts/init_letsencrypt.sh

The same command can also be used to update an expired certificate.

Note you may want to change the LETSENCRYPT_EMAIL, LETSENCRYPT_RSA_KEY_SIZE and LETSENCRYPT_STAGING variables.

Infrastructure

Based on this example https://testdriven.io/blog/dockerizing-django-with-postgres-gunicorn-and-nginx/

Ports

service	port	configuration	local	development	production
nginx http	80	WEB_HTTP_PORT	✅	✅	✅
nginx https	443	WEB_HTTPS_PORT	✅	✅	✅
django http	8011	DJANGO_DEV_PORT	✅	❌	❌
postgres	5433	HOST_POSTGRES_PORT	✅	✅	✅
redis	6379	REDIS_PORT	✅	✅	✅
memcached	11211	MEMCACHED_PORT	✅	❌	❌
geodb	5432	HOST_POSTGRES_PORT	✅	✅	❌
minio API	8009	MINIO_API_PORT	✅	❌	❌
minio browser	8010	MINIO_BROWSER_PORT	✅	❌	❌
smtp web	8012	SMTP4DEV_WEB_PORT	✅	❌	❌
smtp	25	SMTP4DEV_SMTP_PORT	✅	❌	❌
imap	143	SMTP4DEV_IMAP_PORT	✅	❌	❌

Logs

Docker logs are managed by docker in the default way. To read the logs:

docker compose logs

For great nginx logs, use:

QFC_JQ='[.ts, .ip, (.method + " " + (.status|tostring) + " " + (.resp_time|tostring) + "s"), .uri, "I " + (.request_length|tostring) + " O " + (.resp_body_size|tostring), "C " + (.upstream_connect_time|tostring) + "s", "H " + (.upstream_header_time|tostring) + "s", "R " + (.upstream_response_time|tostring) + "s", .user_agent] | @tsv'
docker compose logs nginx -f --no-log-prefix | grep ':"nginx"' | jq -r $QFC_JQ

Geodb

The geodb (database for the users projects data) is installed on separated machines (db1.qfield.cloud, db2.qfield.cloud, db3…) and they are load balanced and available through the db.qfield.cloud address.

There is a template database called template_postgis that is used to create the databases for the users. The template db has the following extensions installed:

• fuzzystrmatch
• plpgsql
• postgis
• postgis_{tigergeocoder}
• postgis_topology

Storage

You can use either the integrated minio object storage, or use an external provider (e. g. S3) with versioning enabled. Check the corresponding STORAGE_* environment variables for more info.

Collaboration

Contributions welcome!

Any PR including the [WIP] should be:

• able to be checked-out without breaking the stack;
• the specific feature being developed/modified should be testable locally (does not mean it should work correctly).

Resources

• QField Cloud "marketing" page
• API Swagger doc
• API status page