Add hot-reload option to docker entrypoint (geopython#1880)

* Add hot-reload to entrypoint

* Move gunicorn exec to bash function

* Create WSGI_APP for gunicorn entrypoint

Create WSGI_APP for gunicorn entrypoint with default value of `pygeoapi.flask_app:APP`

* Respond to PR feedback

Author: webb-ben

docker/entrypoint.sh

@@ -2,8 +2,10 @@
 # =================================================================
 #
 # Authors: Just van den Broecke <[email protected]>
+#          Benjamin Webb <[email protected]>
 #
 # Copyright (c) 2019 Just van den Broecke
+# Copyright (c) 2024 Benjamin Webb
 #
 # Permission is hereby granted, free of charge, to any person
 # obtaining a copy of this software and associated documentation
@@ -43,6 +45,7 @@ SCRIPT_NAME=${SCRIPT_NAME:=/}
 CONTAINER_NAME=${CONTAINER_NAME:=pygeoapi}
 CONTAINER_HOST=${CONTAINER_HOST:=0.0.0.0}
 CONTAINER_PORT=${CONTAINER_PORT:=80}
+WSGI_APP=${WSGI_APP:=pygeoapi.flask_app:APP}
 WSGI_WORKERS=${WSGI_WORKERS:=4}
 WSGI_WORKER_TIMEOUT=${WSGI_WORKER_TIMEOUT:=6000}
 WSGI_WORKER_CLASS=${WSGI_WORKER_CLASS:=gevent}
@@ -66,6 +69,20 @@ pygeoapi openapi generate ${PYGEOAPI_CONFIG} --output-file ${PYGEOAPI_OPENAPI}
 
 echo "openapi.yml generated continue to pygeoapi"
 
+start_gunicorn() {
+	# SCRIPT_NAME should not have value '/'
+	[[ "${SCRIPT_NAME}" = '/' ]] && export SCRIPT_NAME="" && echo "make SCRIPT_NAME empty from /"
+
+	echo "Starting gunicorn name=${CONTAINER_NAME} on ${CONTAINER_HOST}:${CONTAINER_PORT} with ${WSGI_WORKERS} workers and SCRIPT_NAME=${SCRIPT_NAME}"
+	exec gunicorn --workers ${WSGI_WORKERS} \
+		--worker-class=${WSGI_WORKER_CLASS} \
+		--timeout ${WSGI_WORKER_TIMEOUT} \
+		--name=${CONTAINER_NAME} \
+		--bind ${CONTAINER_HOST}:${CONTAINER_PORT} \
+		${@} \
+		${WSGI_APP}
+}
+
 case ${entry_cmd} in
 	# Run Unit tests
 	test)
@@ -91,19 +108,21 @@ case ${entry_cmd} in
 
 	# Run pygeoapi server
 	run)
-		# SCRIPT_NAME should not have value '/'
-		[[ "${SCRIPT_NAME}" = '/' ]] && export SCRIPT_NAME="" && echo "make SCRIPT_NAME empty from /"
-
-		echo "Start gunicorn name=${CONTAINER_NAME} on ${CONTAINER_HOST}:${CONTAINER_PORT} with ${WSGI_WORKERS} workers and SCRIPT_NAME=${SCRIPT_NAME}"
-		exec gunicorn --workers ${WSGI_WORKERS} \
-				--worker-class=${WSGI_WORKER_CLASS} \
-				--timeout ${WSGI_WORKER_TIMEOUT} \
-				--name=${CONTAINER_NAME} \
-				--bind ${CONTAINER_HOST}:${CONTAINER_PORT} \
-				pygeoapi.flask_app:APP
-	  ;;
+		# Start
+		start_gunicorn
+		;;
+
+	# Run pygeoapi server with hot reload
+	run-with-hot-reload)
+		# Lock all Python files (for gunicorn hot reload)
+		find . -type f -name "*.py" | xargs chmod 0444
+
+		# Start with hot reload options
+		start_gunicorn --reload --reload-extra-file ${PYGEOAPI_CONFIG}
+		;;
+
 	*)
-	  error "unknown command arg: must be run (default) or test"
+	  error "unknown command arg: must be run (default), run-with-hot-reload, or test"
 	  ;;
 esac
 

docs/source/running-with-docker.rst

@@ -29,6 +29,12 @@ To run with the default built-in configuration and data:
 
 ...then browse to http://localhost:5000
 
+You can also run pygeoapi with run-with-hot-reload of the configuration enabled
+
+.. code-block:: bash
+
+   docker run -p 5000:80 -it geopython/pygeoapi run-with-hot-reload
+
 You can also run all unit tests to verify:
 
 .. code-block:: bash
@@ -91,8 +97,10 @@ The base Docker image supports two additional environment variables for configur
    .. code-block:: bash
 
       docker run -p 5000:80 -e PYGEOAPI_SERVER_ADMIN=true -it geopython/pygeoapi
+      # run with hot reload
+      docker run -p 5000:80 -e PYGEOAPI_SERVER_ADMIN=true -it geopython/pygeoapi run-with-hot-reload
 
-   This does not enable hot reloading of the `pygeoapi` configuration. To learn more about the Admin API see :ref:`admin-api`.
+   To learn more about the Admin API see :ref:`admin-api`.
 
 
 Deploying on a sub-path