Node-RED on Docker with Balena-Engine need mkdir Permission on PLC Next

Hello everybody, i currently have the problem that I would like to create a .csv file directly on the PLC Next in a certain directory via Nodered, unfortunately Node-Red lacks the permission to create this file on the PLC Next.

Can someone please tell me what I need to set/change so that Node-Red can create/delete/change/overwrite these files at any time? The following error message : „Error creating file: Error: EACCES: permission denied, mkdir ‚/opt/plcnext‘“ Meinen Node-Red Flow : [{„id“:„687306f9.a916a“,„type“:„file“,„z“:„f6f2187d.f17ca8“,„name“:„“,„filename“:„/opt/plcnext/logger.csv“,„appendNewline“:true,„createDir“:true,„overwriteFile“:„true“,„encoding“:„none“,„x“:960,„y“:100,„wires“:[]},{„id“:„91881442.f40e2“,„type“:„inject“,„z“:„f6f2187d.f17ca8“,„name“:„“,„props“:[{„p“:„payload“},{„p“:„topic“,„vt“:„str“}],„repeat“:„“,„crontab“:„“,„once“:false,„onceDelay“:0.1,„topic“:„“,„payload“:„“,„payloadType“:„date“,„x“:270,„y“:100,„wires“:[[„6fae87cc.d45538“]]},{„id“:„6fae87cc.d45538“,„type“:„function“,„z“:„f6f2187d.f17ca8“,„name“:„“,„func“:„var capa = flow.get("capa") || 0;\ flow.set ("ccapa_Ah",capa);\ \ return {payload:"Kapazität in Ah;Kapa"};“,„outputs“:1,„noerr“:0,„initialize“:„“,„finalize“:„“,„x“:440,„y“:100,„wires“:[[„6b721786.23fa1“,„687306f9.a916a“]]},{„id“:„6b721786.23fa1“,„type“:„debug“,„z“:„f6f2187d.f17ca8“,„name“:„“,„active“:true,„tosidebar“:true,„console“:false,„tostatus“:false,„complete“:„false“,„statusVal“:„“,„statusType“:„auto“,„x“:670,„y“:40,„wires“:}] Attached is a picture of the flow Thanks for you help guys! nilsbaurx

Hello, as far as I understand the flow above will store the csv-file inside the container and not on the host. If you want to store data on the host you can create a volume for docker and redirect a folder from the container to that volume which is a folder on the host. mkdir node-red-user-data docker volume create --name node-red-user-data docker run -it … -v /opt/plcnext/node-red-user-data:/data … If you store the csv file in the data folder of the container, the file will be moved to the volume i.e. the /opt/plcnext/node-red-user-data folder in the host.

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Hello, I have now set up the container again.

I created the directory exactly as you wrote it to me.
Unfortunately, the same error message still appears in Node-Red.
See attachment. Can you please tell me what exactly is still wrong ? nilsbaurx

Node-Red.PNG
Node-red-user-data.PNG
Putty Befehl.PNG

forgot it, it works now! =)

Screenshot 2022-11-30 at 10.22.46.png