Added option to fix permissions and update Readme

Author: merlinschumacher

README.md

@@ -85,6 +85,7 @@ Additionally you should run c't-Smart-Home behind a reverse proxy like [Traefik]
 —————————————————————————————
 Usage:
 start.sh update – to update this copy of the repo
+start.sh fix – correct the permissions in the data folder 
 start.sh start – run all containers
 start.sh stop – stop all containers
 start.sh data – set up the data folder needed for the containers, but run none of them. Useful for personalized setups.
@@ -134,6 +135,10 @@ You could try, but we don't support it on a Mac.
 
 We probably removed some unnecessary or outdated nodes. Check which are missing and look in the palette for them. Most likely you can reinstall them from there.
 
+### Node-RED won't start after an update. The logs show permission errors. How do I fix this?
+
+For security reasons the Node-RED service won't run as root anymore. It now runs with the GID and UID 1000. To fix this issue you must set the GID and UID of data/nodered and all of its content to 1000. You can use `start.sh fix` to correct those issues.
+
 ## Container images and Versions
 
 The Node-RED container image is a variation on [the official one](https://hub.docker.com/r/nodered/node-red) provided by the Node-RED project. We provide versions based on Node.js versions 10 (Maintenance LTS), 12 (Maintenance LTS) and 14 (Active LTS). See Node.js [releases page](https://nodejs.org/en/about/releases/) for support cycles. The container image based on Active LTS will always be the default. You can freely modify your copy of the compose file to use a different container image or even create your own image.

start.sh

@@ -74,6 +74,15 @@ echo '⚠️  Disable permit_join in data/zigbee/configuration.yaml or the Zigbe
 
 }
 
+function fix_permissions {
+	echo '📄 Setting the permissions of the configurations in the data folder.'
+	sudo chown 1883:1883 data/mqtt
+	sudo chown -Rf 1883:1883 data/mqtt/*
+	sudo chown 1000:1000 data/nodered
+	sudo chown -Rf 1000:1000 data/nodered/*
+}
+
+
 function build_data_structure {
 	echo '📄 Configuration folder ./data is missing. Creating it from scratch.'
 	mkdir -p data/mqtt/config
@@ -88,10 +97,7 @@ function build_data_structure {
 		create_zigbee2mqtt_config
 	fi
 
-	sudo chown 1883:1883 data/mqtt
-	sudo chown -R 1883:1883 data/mqtt/*
-	sudo chown 1000:1000 data/nodered
-	sudo chown -Rf 1000:1000 data/nodered/*
+	fix_permissions
 }
 
 function check_dependencies {
@@ -143,7 +149,7 @@ Then copy the current version from GitHub to this folder and run
 ./start.sh start.
 
 Alternatively create a Git clone of the repository."
-exit 1
+		exit 1
 	fi
 	echo '☠️  Shutting down all running containers and removing them.'
 	docker-compose down --remove-orphans
@@ -163,6 +169,7 @@ exit 1
 		echo '⚠️  Updating failed. Please check the repository on GitHub.'
 	fi	    
 	start
+	fix_permissions
 }
 
 check_dependencies
@@ -177,6 +184,9 @@ case "$1" in
 	"update")
 		update
 		;;
+	"fix")
+		fix_permissions	
+		;;
 	"data")
 		build_data_structure
 		;;
@@ -186,6 +196,7 @@ case "$1" in
 —————————————————————————————
 Usage:
 start.sh update – update to the latest release version
+start.sh fix – correct the permissions in the data folder 
 start.sh start – run all containers
 start.sh stop – stop all containers
 start.sh data – set up the data folder needed for the containers, but run none of them. Useful for personalized setups.