Allow configuration options to be set from the environment in the container distribution. Fixes #4651

docs/en_US/config_py.rst

@@ -0,0 +1,34 @@
+.. _config_py:
+
+***************************
+`The config.py File`:index:
+***************************
+
+There are multiple configuration files that are read at startup by pgAdmin. These
+are as follows:
+
+* ``config.py``: This is the main configuration file, and should not be modified.
+  It can be used as a reference for configuration settings, that may be overridden
+  in one of the following files.
+
+* ``config_distro.py``: This file is read after ``config.py`` and is intended for
+  packagers to change any settings that are required for their pgAdmin distribution.
+  This may typically include certain paths and file locations. This file is optional,
+  and may be created by packagers in the same directory as ``config.py`` if
+  needed.
+
+* ``config_local.py``: This file is read after ``config_distro.py`` and is intended
+  for end users to change any default or packaging specific settings that they may
+  wish to adjust to meet local preferences or standards.This file is optional,
+  and may be created by users in the same directory as ``config.py`` if
+  needed.
+
+.. note:: If the SERVER_MODE setting is changed in ``config_distro.py`` or ``config_local.py``,
+     you will most likely need to re-set the LOG_FILE, SQLITE_PATH, SESSION_DB_PATH
+     and STORAGE_DIR values as well as they will have been set based on the default
+     configuration or overridden by the runtime.
+
+The default ``config.py`` file is shown below for reference:
+
+.. literalinclude:: ../../web/config.py
+   :language: python

docs/en_US/container_deployment.rst

@@ -83,6 +83,21 @@ Adjust the number of threads the Gunicorn server uses to handle incoming
 requests. This should typically be left as-is, except in highly loaded systems
 where it may be increased.
 
+*PGADMIN_CONFIG_*
+
+This is a variable prefix that can be used to override any of the configuration
+options in pgAdmin's *config.py* file. Add the *PGADMIN_CONFIG_* prefix to any
+variable name from *config.py* and give the value in the format 'string value'
+for strings, True/False for booleans or 123 for numbers. See below for an
+example.
+
+Settings are written to */pgadmin4/config_distro.py* within the container, which
+is read after */pgadmin4/config.py* and before */pgadmin4/config_local.py*.
+Any settings given will therefore override anything in config.py, but can be
+overridden by settings in config_local.py.
+
+See :ref:`config_py` for more information on the available configuration settings.
+
 Mapped Files and Directories
 ****************************
 
@@ -101,7 +116,8 @@ invocations of the container.
 
 This file can be used to override configuration settings in pgAdmin. Settings
 found in config.py can be overridden with deployment specific values if
-required.
+required. Settings in config_local.py will also override anything specified in
+the container environment through *PGADMIN_CONFIG_* prefixed variables.
 
 */pgadmin4/servers.json*
 
@@ -129,8 +145,21 @@ Run a simple container over port 80:
 
     docker pull dpage/pgadmin4
     docker run -p 80:80 \
-        -e "PGADMIN_DEFAULT_EMAIL=user@domain.com" \
-        -e "PGADMIN_DEFAULT_PASSWORD=SuperSecret" \
+        -e 'PGADMIN_DEFAULT_EMAIL=user@domain.com' \
+        -e 'PGADMIN_DEFAULT_PASSWORD=SuperSecret' \
+        -d dpage/pgadmin4
+
+Run a simple container over port 80, setting some configuration options:
+
+.. code-block:: bash
+
+    docker pull dpage/pgadmin4
+    docker run -p 80:80 \
+        -e 'PGADMIN_DEFAULT_EMAIL=user@domain.com' \
+        -e 'PGADMIN_DEFAULT_PASSWORD=SuperSecret' \
+        -e 'PGADMIN_CONFIG_ENHANCED_COOKIE_PROTECTION=True' \
+        -e 'PGADMIN_CONFIG_LOGIN_BANNER="Authorised users only!"' \
+        -e 'PGADMIN_CONFIG_CONSOLE_LOG_LEVEL=10' \
         -d dpage/pgadmin4
 
 Run a TLS secured container using a shared config/storage directory in
@@ -141,13 +170,13 @@ Run a TLS secured container using a shared config/storage directory in
 
     docker pull dpage/pgadmin4
     docker run -p 443:443 \
-        -v "/private/var/lib/pgadmin:/var/lib/pgadmin" \
-        -v "/path/to/certificate.cert:/certs/server.cert" \
-        -v "/path/to/certificate.key:/certs/server.key" \
-        -v "/tmp/servers.json:/servers.json" \
-        -e "PGADMIN_DEFAULT_EMAIL=user@domain.com" \
-        -e "PGADMIN_DEFAULT_PASSWORD=SuperSecret" \
-        -e "PGADMIN_ENABLE_TLS=True" \
+        -v '/private/var/lib/pgadmin:/var/lib/pgadmin' \
+        -v '/path/to/certificate.cert:/certs/server.cert' \
+        -v '/path/to/certificate.key:/certs/server.key' \
+        -v '/tmp/servers.json:/servers.json' \
+        -e 'PGADMIN_DEFAULT_EMAIL=user@domain.com' \
+        -e 'PGADMIN_DEFAULT_PASSWORD=SuperSecret' \
+        -e 'PGADMIN_ENABLE_TLS=True' \
         -d dpage/pgadmin4
 
 Reverse Proxying

docs/en_US/deployment.rst

@@ -13,6 +13,7 @@ will provide detailed information about creating a custom deployment.
 .. toctree::
    :maxdepth: 2
 
+   config_py
    desktop_deployment
    server_deployment
    container_deployment

docs/en_US/desktop_deployment.rst

@@ -36,32 +36,10 @@ this is overridden by the desktop runtime at startup. In most environments, no
 Python configuration is required unless you wish to override other default
 settings.
 
-There are multiple configuration files that are read at startup by pgAdmin. These
-are as follows:
-
-* ``config.py``: This is the main configuration file, and should not be modified.
-  It can be used as a reference for configuration settings, that may be overridden
-  in one of the following files.
-
-* ``config_distro.py``: This file is read after ``config.py`` and is intended for
-  packagers to change any settings that are required for their pgAdmin distribution.
-  This may typically include certain paths and file locations. This file is optional,
-  and may be created by packagers in the same directory as ``config.py`` if
-  needed.
-
-* ``config_local.py``: This file is read after ``config_distro.py`` and is intended
-  for end users to change any default or packaging specific settings that they may
-  wish to adjust to meet local preferences or standards.This file is optional,
-  and may be created by users in the same directory as ``config.py`` if
-  needed.
-
-.. note:: If the SERVER_MODE setting is changed in ``config_distro.py`` or ``config_local.py``,
-     you will most likely need to re-set the LOG_FILE, SQLITE_PATH, SESSION_DB_PATH
-     and STORAGE_DIR values as well as they will have been set based on the default
-     configuration or overridden by the runtime.
+See :ref:`config_py` for more information on configuration settings.
 
 Runtime
--------
+*******
 
 When executed, the runtime will automatically try to execute the pgAdmin Python
 application. If execution fails, it will prompt you to adjust the Python Path

docs/en_US/release_notes_4_13.rst

@@ -9,6 +9,7 @@ This release contains a number of bug fixes and new features since the release o
 New features
 ************
 
+| `Issue #4651 <https://redmine.postgresql.org/issues/4651>`_ -  Allow configuration options to be set from the environment in the container distribution.
 
 Housekeeping
 ************

docs/en_US/server_deployment.rst

@@ -59,24 +59,7 @@ In order to configure pgAdmin to run in server mode, it may be necessary to
 configure the Python code to run in multi-user mode, and then to configure the
 web server to find and execute the code.
 
-Note that there are multiple configuration files that are read at startup by
-pgAdmin. These are as follows:
-
-* ``config.py``: This is the main configuration file, and should not be modified.
-  It can be used as a reference for configuration settings, that may be overridden
-  in one of the following files.
-
-* ``config_distro.py``: This file is read after ``config.py`` and is intended for
-  packagers to change any settings that are required for their pgAdmin distribution.
-  This may typically include certain paths and file locations. This file is optional,
-  and may be created by packagers in the same directory as ``config.py`` if
-  needed.
-
-* ``config_local.py``: This file is read after ``config_distro.py`` and is intended
-  for end users to change any default or packaging specific settings that they may
-  wish to adjust to meet local preferences or standards. This file is optional,
-  and may be created by administrators in the same directory as ``config.py`` if
-  needed.
+See :ref:`config_py` for more information on configuration settings.
 
 Python
 ------
@@ -117,6 +100,12 @@ In order to configure the Python code, follow these steps:
 
        # chown www-data:www-data /var/lib/pgadmin4/pgadmin4.db
 
+Hosting
+*******
+
+There are many possible ways to host pgAdmin in server mode. Some examples are
+given below:
+
 Apache HTTPD Configuration (Windows)
 ------------------------------------
 

pkg/docker/Dockerfile

@@ -86,7 +86,6 @@ RUN apk add --no-cache --virtual build-deps build-base postgresql-dev libffi-dev
 # Copy the code
 COPY ./pgadmin4/web /pgadmin4
 COPY ./run_pgadmin.py /pgadmin4
-COPY ./config_distro.py /pgadmin4
 COPY ./entrypoint.sh /entrypoint.sh
 
 # Precompile and optimize python code to save time and space on startup

pkg/docker/config_distro.py

@@ -1,4 +0,0 @@
-HELP_PATH = '../../docs'
-DEFAULT_BINARY_PATHS = {
-        'pg': '/usr/local/pgsql-11'
-}

pkg/docker/entrypoint.sh

@@ -1,5 +1,23 @@
 #!/bin/sh
 
+# Create config_distro.py. This has some default config, as well as anything
+# provided by the user through the PGADMIN_CONFIG_* environment variables.
+# Only write the file on first launch.
+if [ ! -f /pgadmin4/config_distro.py ]; then
+    cat << EOF > /pgadmin4/config_distro.py
+HELP_PATH = '../../docs'
+DEFAULT_BINARY_PATHS = {
+        'pg': '/usr/local/pgsql-11'
+}
+EOF
+
+    # This is a bit kludgy, but necessary as the container uses BusyBox/ash as
+    # it's shell and not bash which would allow a much cleaner implementation
+    for var in $(env | grep PGADMIN_CONFIG_ | cut -d "=" -f 1); do
+        echo ${var#PGADMIN_CONFIG_} = $(eval "echo \$$var") >> /pgadmin4/config_distro.py
+    done
+fi
+
 if [ ! -f /var/lib/pgadmin/pgadmin4.db ]; then
     if [ -z "${PGADMIN_DEFAULT_EMAIL}" -o -z "${PGADMIN_DEFAULT_PASSWORD}" ]; then
         echo 'You need to specify PGADMIN_DEFAULT_EMAIL and PGADMIN_DEFAULT_PASSWORD environment variables'