Hi team I have run prefect agent local start command and it Prefect Community #prefect-server

Hi team, I have run prefect agent local start comm...

rafaqat ali

03/02/2021, 12:41 PM

Hi team, I have run prefect agent local start command and it gives me error:No Agent Api token provided I'm running server and not cloud. Can any guide me, how can I generate this token for server?

Greg Roche

03/02/2021, 12:45 PM

Have you run

prefect backend server

before running

prefect agent local start

rafaqat ali

03/02/2021, 12:46 PM

I have run docker-compose up command only

Greg Roche

03/02/2021, 12:47 PM

Then run

prefect backend server

before starting the agent. You don't need to generate any tokens in order for agents to be able to connect to Prefect Server.

rafaqat ali

03/02/2021, 12:47 PM

thanks

rafaqat ali

03/02/2021, 1:02 PM

I have run the command: prefect agent docker start and docker agent is created successfully and I'm able to see in UI. But, when I run the flow from UI, all the tasks are getting late run and not running successfully.

Greg Roche

03/02/2021, 1:05 PM

Could be a bunch of different things, but a common beginner pitfall is labels: your flow must have the same labels as the agent (or at least, the flow needs a subset of the agent's labels) https://docs.prefect.io/orchestration/execution/overview.html#labels

Greg Roche

03/02/2021, 1:35 PM

You deleted your screenshot, but the flow had a label that the agent did not have, so the agent would not execute runs of that flow. From the documentation I linked:

On the other hand if you register a flow that has environment labels set to
["dev", "staging"]
and run an Agent with the labels
["dev"]
then it will not pick up the flow because there exists labels in the environment which were not provided to the agent.

rafaqat ali

03/02/2021, 1:36 PM

Thank you, got your point

rafaqat ali

03/02/2021, 1:39 PM

Now, flows are executed successfully. But for every flow, I got the error Failed to load and execute Flow's environment: ModuleNotFoundError("No module named 'C'")

rafaqat ali

03/02/2021, 1:43 PM

Agent is running on different machine and I'm registering flow from different machine.

rafaqat ali

03/02/2021, 1:44 PM

Code that I'm using to register the flow is:

Copy code

with Flow("Test run", run_config=DockerRun(labels=["dev"])) as flow:
            flow.add_task(say_hello())
        flow.register("Test")

rafaqat ali

03/02/2021, 2:47 PM

Can anyone guide me about the issue I'm facing in flow run from UI: Failed to load and execute Flow's environment: AttributeError("'NoneType' object has no attribute 'rstrip'") My flow storage is on azure blob. When I execute the flow from UI, I got the error

Greg Roche

03/02/2021, 3:11 PM

As this channel is for questions related to Prefect Server you'll probably get more views in #prefect-community. It doesn't seem like this issue is related to Prefect Server because the error message suggests there is a problem within the logic of your flow, because at some point the code is trying to run

foo.rstrip()

where the value of

foo

None

Greg Roche

03/02/2021, 3:13 PM

Copy code

foo = None
foo.rstrip("a")
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
AttributeError: 'NoneType' object has no attribute 'rstrip'

rafaqat ali

03/02/2021, 4:01 PM

My agent is running on different machine and I'm registering flow from different machine? is this the issue you think?

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