To enable persistent variables in nodered you need to change:
/usr/lib/node_modules/node-red
uncomment this lines:
/** Context Storage
* The following property can be used to enable context storage. The configuration
* provided here will enable file-based context that flushes to disk every 30 seconds.
* Refer to the documentation for further options: https://nodered.org/docs/api/context/
*/
contextStorage: {
default: {
module:"localfilesystem"
},
},
after an update you need to do it again!. Global variables are now persistent.
Update: After update 3.50 this don't work anymore at all!!