make Nebulaworker to update container if a Flag is set

[Mohammadjavad Ranji]

Hi Guys,

Problem:
I an novice to Nebula, I had implemented nebula in my server and worker
in my device. now I need to give the possibility to worker that when
the update from nebula manager is released, check a flag and if the
flag is set then fetch and replace the new version of container on the
device, Else do not update the new version unless the worker recieve a
trigger or the flag is set.

Questions?

1- I really dont know where should I start. is there such capability
now in worker?

2- should I manipulate worker.py in worker container based on my
need?3- if I done question 2. how do I make the iot devices to install
the new worker? i mean how should I create new worker with edited
worker.py

Thanks in advance.
emjay

[naor livne]

Hi Mohammadjavad,

I think a good starting point for you will be to read up on how to create docker images as the Nebula worker is just a Docker image (https://docs.docker.com/get-started/part2/ is an example tutorial), after that you'll need to edit worker.py to include the flag logic you desire then build a new container, publish it to a Docker registry (https://hub.docker.com/ is my personal recommendation but any registry will work, https://docs.docker.com/docker-hub/repos/#pushing-a-docker-container-image-to-docker-hub) and then you can just run the new image you created as part of the docker run command used to set up the worker rather then the official worker.

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