Add support to deploy pgadmin in container with readOnlyRootFilesyste…

…m as true.pgadmin-org#7330

docs/en_US/container_deployment.rst

@@ -142,6 +142,13 @@ Override the default file path for the preferences customization at the containe
 /pgadmin4/preferences.json mapped file below for more information. See the format
 of the `Preferences JSON file <https://www.pgadmin.org/docs/pgadmin4/latest/preferences.html#json-format>`_.
 
+**PGADMIN_CONFIG_DISTRO_FILE**
+
+*Default: /pgadmin4/config_distro.py*
+
+Override the default file path for the pgadmin configurations file.This can be used while provisioning
+container with read only root file system to achieve a more secure pgadmin4 deployment for docker and kubernetes.
+
 **PGPASS_FILE**
 
 *Default: <null>*

pkg/docker/entrypoint.sh

@@ -36,12 +36,15 @@ if [ -n "${PGADMIN_CONFIG_CONFIG_DATABASE_URI_FILE}" ]; then
 fi
 file_env PGADMIN_DEFAULT_PASSWORD
 
+# TO enable custom path for config_distro, pass config distro path via environment variable.
+export CONFIG_DISTRO_FILE_PATH="${PGADMIN_CONFIG_DISTRO_FILE:-/pgadmin4/config_distro.py}"
+
 # Populate config_distro.py. This has some default config, as well as anything
 # provided by the user through the PGADMIN_CONFIG_* environment variables.
 # Only update the file on first launch. The empty file is created during the
 # container build so it can have the required ownership.
-if [ "$(wc -m /pgadmin4/config_distro.py | awk '{ print $1 }')" = "0" ]; then
-    cat << EOF > /pgadmin4/config_distro.py
+if [ "$(wc -m "${CONFIG_DISTRO_FILE_PATH}" | awk '{ print $1 }')" = "0" ]; then
+    cat << EOF > "${CONFIG_DISTRO_FILE_PATH}"
 CA_FILE = '/etc/ssl/certs/ca-certificates.crt'
 LOG_FILE = '/dev/null'
 HELP_PATH = '../../docs'
@@ -61,7 +64,7 @@ EOF
     for var in $(env | grep "^PGADMIN_CONFIG_" | cut -d "=" -f 1); do
         # shellcheck disable=SC2086
         # shellcheck disable=SC2046
-        echo ${var#PGADMIN_CONFIG_} = $(eval "echo \$$var") >> /pgadmin4/config_distro.py
+        echo ${var#PGADMIN_CONFIG_} = $(eval "echo \$$var") >> "${CONFIG_DISTRO_FILE_PATH}"
     done
 fi
 

web/pgadmin/evaluate_config.py

@@ -10,7 +10,7 @@
 import os
 import sys
 import keyring
-import email_validator
+import importlib.util
 
 # User configs loaded from config_local, config_distro etc.
 custom_config_settings = {}
@@ -27,6 +27,17 @@ def get_variables_from_module(module_name):
     return variables
 
 
+# Function to load config_distro at custom path
+def import_module_from_path(module_name, file_path):
+    # Create a module spec
+    spec = importlib.util.spec_from_file_location(module_name, file_path)
+    # Create the module based on the spec
+    module = importlib.util.module_from_spec(spec)
+    # Execute the module (this loads it)
+    spec.loader.exec_module(module)
+    return module
+
+
 def validate_config_variable(key, value):
     boolean_keys = ['SERVER_MODE', 'ENHANCED_COOKIE_PROTECTION',
                     'SUPPORT_SSH_TUNNEL', 'ALLOW_SAVE_TUNNEL_PASSWORD',
@@ -47,7 +58,12 @@ def validate_config_variable(key, value):
 
 # Load distribution-specific config overrides
 try:
-    import config_distro
+    if 'CONFIG_DISTRO_FILE_PATH' in os.environ:
+        config_distro_path = os.environ['CONFIG_DISTRO_FILE_PATH']
+        config_distro = import_module_from_path('config_distro',
+                                                config_distro_path)
+    else:
+        import config_distro
     config_distro_settings = get_variables_from_module('config_distro')
     custom_config_settings.update(config_distro_settings)
 except ImportError: