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6. Configuração avançada

6.1. Logging

To log requests sent to the server, you have to set the following environment variable:

With the following variables the logging can be further customized:

6.2. Variáveis ambientais

Você pode configurar alguns aspectos do QGIS Server configurando environment variables.

According to the HTTP server and how you run QGIS Server, there are several ways to define these variables. This is fully described in Servidor HTTP Apache.

Name & Description

Padrão

Serviços
QGIS_OPTIONS_PATH

Specifies the path to the directory with settings. It works the same way as QGIS application --optionspath option. It is looking for settings file in <QGIS_OPTIONS_PATH>/QGIS/QGIS3.ini.

‘’

Tudo
QGIS_PLUGINPATH

Useful if you are using Python plugins for the server, this sets the folder that is searched for Python plugins.

‘’

Tudo
QGIS_PROJECT_FILE

The .qgs or .qgz project file, normally passed as a parameter in the query string (with MAP), you can also set it as an environment variable (for example by using mod_rewrite Apache module).

Nota

You may also indicate a project stored in PostgreSQL, e.g. postgresql://localhost:5432?sslmode=disable&dbname=mydb&schema=myschema&project=myproject or inside a geopackage file, e.g. geopackage:/path/to/geopackage/file.gpkg?projectName=myProjectName.

‘’

Tudo
QGIS_SERVER_ALLOWED_EXTRA_SQL_TOKENS

Comma separated list of strings that represent the allowed extra SQL tokens accepted as components of a feature filter.

‘’

WMS
QGIS_SERVER_API_RESOURCES_DIRECTORY

Diretório base para todos os recursos estáticos OGC API (tais como OAPIF/WFS3) (modelos HTML, CSS, JS, …)

depende do pacote

OAPIF/WFS3
QGIS_SERVER_APPLICATION_NAME

Name of the application to be used, for instance when connecting to a database to identify the QGIS server instance connected

QGIS3 server

Tudo
QGIS_SERVER_API_WFS3_MAX_LIMIT

Maximum value for limit in a OAPIF/WFS3 features request.

10000

OAPIF/WFS3
QGIS_SERVER_CACHE_DIRECTORY

Specifies the network cache directory on the filesystem.

cache in profile directory

Tudo
QGIS_SERVER_CACHE_SIZE

Sets the network cache size in MB.

50 MB

Tudo
QGIS_SERVER_CAPABILITIES_CACHE_SIZE

The maximum number of project capabilities to cache.

40

Tudo
QGIS_SERVER_DISABLE_GETPRINT

Esta é uma opção no nível do projeto para melhorar o tempo de leitura do projeto desativando o carregamento de layouts.

Activating this option disables the QGIS WMS GetPrint request. Set this QGIS project flag to not load layouts.

falso

WMS
QGIS_SERVER_FORCE_READONLY_LAYERS

Force QGIS Server to open all layers in a read only mode

falso

Tudo
QGIS_SERVER_IGNORE_BAD_LAYERS

“Bad” layers are layers that cannot be loaded. The default behavior of QGIS Server is to consider the project as not available if it contains a bad layer.

The default behavior can be overridden by setting this variable to 1 or true. In this case, “bad” layers will just be ignored, and the project will be considered valid and available.

falso

Tudo
QGIS_SERVER_LANDING_PAGE_PREFIX

Prefixo do componente do caminho da URL base da página inicial

“”

Tudo
QGIS_SERVER_LANDING_PAGE_PROJECTS_DIRECTORIES

Directories used by the landing page service to find .qgs and .qgz projects

“”

Tudo
QGIS_SERVER_LANDING_PAGE_PROJECTS_PG_CONNECTIONS

PostgreSQL connection strings used by the landing page service to find projects

“”

Tudo
QGIS_SERVER_LOG_FILE

Especificar o caminho e o nome do arquivo. Certifique-se de que o servidor tenha as permissões adequadas para gravar no arquivo. O arquivo deve ser criado automaticamente, basta enviar algumas requisições para o servidor. Se não estiver lá, verifique as permissões.

Aviso

QGIS_SERVER_LOG_FILE is deprecated since QGIS 3.4, use QGIS_SERVER_LOG_STDERR instead. File logging support will be removed in QGIS 4.0.

‘’

Tudo
QGIS_SERVER_LOG_LEVEL

Especifique o nível de log desejado. Os valores disponíveis são:

  • 0 ou INFO (registrar todas as solicitações)

  • 1 ou ALERTA

  • 2 or CRITICAL (log just critical errors, suitable for production purposes)

0

Tudo
QGIS_SERVER_LOG_PROFILE

Add detailed profile information to the logs, only effective when QGIS_SERVER_LOG_LEVEL=0

falso

Tudo
QGIS_SERVER_LOG_STDERR

Activate logging to stderr. This variable has no effect when QGIS_SERVER_LOG_FILE is set.

  • 0 ou falso (não diferencia maiúsculas de minúsculas)

  • 0 ou verdadeiro (não diferencia maiúsculas de minúsculas)

falso

Tudo
QGIS_SERVER_MAX_THREADS

Number of threads to use when parallel rendering is activated. If value is -1 it uses the number of processor cores.

-1

Tudo
QGIS_SERVER_OVERRIDE_SYSTEM_LOCALE

Sets LOCALE to be used by QGIS server. The default value is empty (no override).

Example: de_CH.utf8

‘’

Tudo
QGIS_SERVER_PARALLEL_RENDERING

Activates parallel rendering for WMS GetMap requests. It’s disabled (false) by default. Available values are:

  • 0 ou falso (não diferencia maiúsculas de minúsculas)

  • 0 ou verdadeiro (não diferencia maiúsculas de minúsculas)

falso

WMS
QGIS_SERVER_PROJECT_CACHE_CHECK_INTERVAL

Controls the periodic strategy interval for cache invalidation, in milliseconds. Defaults to 0 which selects the legacy File system watcher.

Tudo
QGIS_SERVER_PROJECT_CACHE_STRATEGY

Defines method for invalidating the project cache. Available strategies are:

  • filesystem: uses the file system watcher strategy

  • periodic: uses the last modified value of a project for checking changes on project configuration. Convenient on atypical file systems, such as NFS, or when the project file is stored in a database system like PostgreSQL.

  • off: disables internal cache invalidation completely

filesystem

Tudo
QGIS_SERVER_SERVICE_URL

This is an option to set the service URL if it is not present in the project.

The service URL is defined from (in order of precedence):

  • Value defined in the project per service

  • The QGIS_SERVER_<service>_SERVICE_URL environment variable

  • The QGIS_SERVER_SERVICE_URL environment variable

  • The X-Qgis-<service>-Service-Url header

  • The X-Qgis-Service-Url header

  • Build from the Forwarded header

  • Build from the X-Forwarded-Host and X-Forwarded-Proto headers

  • Build from the Host header and the server protocol

  • Build from the server name and the server protocol.

In the last four cases, the resulting Service URL is based on the MAP parameter provided in the query string and on the incoming path request.

‘’

Tudo
QGIS_SERVER_SHOW_GROUP_SEPARATOR

Defines whether a group separator (e.g. thousand separator) should be used for numeric values (e.g. in GetFeatureInfo responses). The default value is 0.

  • 0 ou falso (não diferencia maiúsculas de minúsculas)

  • 0 ou verdadeiro (não diferencia maiúsculas de minúsculas)

falso

WMS
QGIS_SERVER_TRUST_LAYER_METADATA

This is an option at the project level to improve project read time by using the vector layer extents defined in the project metadata and disabling the check for PostgreSQL/PostGIS layer primary key uniqueness.

Trusting layer metadata can be forced by setting this variable to 1 or true. The vector layer’s extent will then be the one defined in the project, and the PostgreSQL/PostGIS layer’s primary key defined in the data source is considered as unique without a check.

Do not use it if layers’ extent is not fixed during the project’s use.

falso

Tudo
QGIS_SERVER_WCS_SERVICE_URL

This is an option to set the service URL if it is not present in the project. See QGIS_SERVER_SERVICE_URL for more information.

‘’

WCS
QGIS_SERVER_WFS_SERVICE_URL

This is an option to set the service URL if it is not present in the project. See QGIS_SERVER_SERVICE_URL for more information.

‘’

WFS
QGIS_SERVER_WMS_MAX_HEIGHT / QGIS_SERVER_WMS_MAX_WIDTH

Maximum height/width for a WMS request. The most conservative between this and the project one is used. If the value is -1, it means that there is no maximum set.

-1

WMS
QGIS_SERVER_WMS_SERVICE_URL

This is an option to set the service URL if it is not present in the project. See QGIS_SERVER_SERVICE_URL for more information.

‘’

WMS
QGIS_SERVER_WMTS_SERVICE_URL

This is an option to set the service URL if it is not present in the project. See QGIS_SERVER_SERVICE_URL for more information.

‘’

WMTS
QUERY_STRING

The query string, normally passed by the web server. This variable can be useful while testing QGIS server binary from the command line.

For example for testing a GetCapabilities request on the command line to a project that also requires a PostgreSQL connection defined in a pg_service.conf file:

PGSERVICEFILE=/etc/pg_service.conf \
QUERY_STRING="MAP=/home/projects/world.qgs&SERVICE=WMS&REQUEST=GetCapabilities" \
/usr/lib/cgi-bin/qgis_mapserv.fcgi

The result should be either the content of the GetCapabilities response or, if something is wrong, an error message.

‘’

Tudo

6.3. Settings summary

When QGIS Server is starting, you have a summary of all configurable parameters thanks to environment variables. Moreover, the value currently used and the origin is also displayed.

Por exemplo com spawn-fcgi:

export QGIS_OPTIONS_PATH=/home/user/.local/share/QGIS/QGIS3/profiles/default/
export QGIS_SERVER_LOG_STDERR=1
export QGIS_SERVER_LOG_LEVEL=2
spawn-fcgi -f /usr/lib/cgi-bin/qgis_mapserv.fcgi -s /tmp/qgisserver.sock -U www-data -G www-data -n

 QGIS Server Settings:

   - QGIS_OPTIONS_PATH / '' (Override the default path for user configuration): '/home/user/.local/share/QGIS/QGIS3/profiles/default/' (read from ENVIRONMENT_VARIABLE)

   - QGIS_SERVER_PARALLEL_RENDERING / '/qgis/parallel_rendering' (Activate/Deactivate parallel rendering for WMS getMap request): 'true' (read from INI_FILE)

   - QGIS_SERVER_MAX_THREADS / '/qgis/max_threads' (Number of threads to use when parallel rendering is activated): '4' (read from INI_FILE)

   - QGIS_SERVER_LOG_LEVEL / '' (Log level): '2' (read from ENVIRONMENT_VARIABLE)

   - QGIS_SERVER_LOG_STDERR / '' (Activate/Deactivate logging to stderr): '1' (read from ENVIRONMENT_VARIABLE)

   - QGIS_PROJECT_FILE / '' (QGIS project file): '' (read from DEFAULT_VALUE)

   - MAX_CACHE_LAYERS / '' (Specify the maximum number of cached layers): '100' (read from DEFAULT_VALUE)

   - QGIS_SERVER_CACHE_DIRECTORY / '/cache/directory' (Specify the cache directory): '/root/.local/share/QGIS/QGIS3/profiles/default/cache' (read from DEFAULT_VALUE)

   - QGIS_SERVER_CACHE_SIZE / '/cache/size' (Specify the cache size): '52428800' (read from INI_FILE)

 Ini file used to initialize settings: /home/user/.local/share/QGIS/QGIS3/profiles/default/QGIS/QGIS3.ini

In this particular case, we know that QGIS_SERVER_MAX_THREADS and QGIS_SERVER_PARALLEL_RENDERING values are read from the ini file found in QGIS_OPTIONS_PATH directory (which is defined through an environment variable). The corresponding entries in the ini file are /qgis/max_threads and /qgis/parallel_rendering and their values are true and 4 threads.

6.4. Connection to service file

In order to make apache aware of the PostgreSQL service file (see the PostgreSQL Service connection file section) you need to make your *.conf file look like:

SetEnv PGSERVICEFILE /home/web/.pg_service.conf

<Directory "/home/web/apps2/bin/">
  AllowOverride None
.....

6.5. Adicione fontes ao seu servidor linux

Tenha em mente que você pode usar projetos QGIS que apontam para fontes que podem não existir por padrão em outras máquinas. Isso significa que se você compartilhar o projeto, ele poderá parecer diferente em outras máquinas (se as fontes não existirem na máquina de destino).

Para garantir que isso não aconteça, você só precisa instalar as fontes ausentes na máquina de destino. Fazer isso em sistemas desktop geralmente é trivial (clique duas vezes nas fontes).

Para linux, se você não tiver um ambiente de desktop instalado (ou preferir a linha de comando), precisará:

  • On Debian based systems:

    sudo su
mkdir -p /usr/local/share/fonts/truetype/myfonts && cd /usr/local/share/fonts/truetype/myfonts

# copy the fonts from their location
cp /fonts_location/* .

chown root *
cd .. && fc-cache -f -v

  • On Fedora based systems:

    sudo su
mkdir /usr/share/fonts/myfonts && cd /usr/share/fonts/myfonts

# copy the fonts from their location
cp /fonts_location/* .

chown root *
cd .. && fc-cache -f -v