I've got a Modbus TCP server running in node-red, which is running via Docker. Unfortunately, this server is unreachable, so I'm thinking it needs port forwarding to outside the Docker container - can anyone confirm this? I also have other issues ( see also ) with the Modbus server, so any help or ad…

[image] Darren: Unfortunately, this server is unreachable, so I'm thinking it needs port forwarding to outside the Docker container - can anyone confirm this? It will depend on the network model used for the container ( Networking overview | Docker Docs ) and where the modbus-tcp client is loca…

Wouldn't mapping another port like -p 1880:1880 -p 10502:10502 be enough? I'm currently trying to follow this info to add the port without recreating the container. Both ipvlan and macvlan look a bit overly complicated...?

[image] Darren: Wouldn't mapping another port like -p 1880:1880 -p 10502:10502 be enough? Port 1880 ist the default for Node-red Dashbord-UI...when the other mapping is not in use, depending on the network model (like when host-model is used, all containers are using the Host-IP of the machin…

Thank you very much for your advice! I'm running node-red docker on more or less bare metal; ended up running a new container (docker doesn't really support adding ports to existing containers), and found that the node-red data was shared between the containers, so quite happy I didn't need to full…

[image] Darren: (docker doesn't really support adding ports to existing containers), A container is the active instance of a Docker(-Image), like a tiny Virtual-Machine, only containing/running a single App and not a full OS). You can start/run many containers from the same Docker-Image concu…

Just a quick note for posterity: Docker only supports adjusting ports when using the run and create commands ; unfortunately, I had to use docker start for the already created container. The only way to adjust the ports is to edit /var/lib/docker/containers/[hash_of_the_container]/hostconfig.json (d…

If you want to more easily update configuration of containers you can use docker-compose. It accepts configuration in a yml file and allows you to keep and edit your configuration. An example of a node-red docker-compose file: --- version: "2.1" services: nodered: network_mode: lsio #self cr…

That looks like a really good idea! I've found this further example - wondering, do you know of any good tutorials or forum threads that go over docker compose for node-red?

If you forget the application building part then this might be interesting (start at step 5) Try Docker Compose Check out this tutorial on how to use Docker Compose from defining application dependencies to experimenting with commands. In my example, the vol…

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Modbus Server with node-red Docker - Port forwarding required?

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Darren 15 May 2023 08:50 8

Here's the link: Modbus TCP previews correct output, but receiving end gets garbage

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Modbus Server with node-red Docker - Port forwarding required?

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