Hi. Any pointers for limiting the server postgresql db size? Any specific things to watch out for while truncating the tables?

Hello everyone, is it correct to run 1 agent for each flow?

Hey team, was wondering if there’s any docs around CI/CD and prefect

Hi everyone — I just deployed my first flow using Prefect Server and something odd is happening with the schedule.. when creating the flow I’ve set up a schedule of 10 minutes, on the UI I can see the schedule exists, however no runs are actually being scheduled at all, like if the schedule didn’t exist.. has that happened with anyone?

this is how I’m defining my clock, then I attach it to the flow by doing

flow.schedule = get_schedule()

import datetime
from datetime import datetime, timedelta
from prefect.schedules import clocks, Schedule


def get_schedule():

    now = datetime.utcnow()

    clock1 = clocks.IntervalClock(
        interval=timedelta(minutes=10),
        parameter_defaults={
            "scope": "full",
        },
    )

    my_schedule = Schedule(
        clocks=[
            clock1,
        ]
    )

    return my_schedule

Hi, may I ask what is the version of python image installed by the Prefect server helm chart ?

Hello! I'm trying to run a fairly simple dbt task but getting this error:

Task 'DbtShellTask': Starting task run...
[2021-07-06 15:05:27-0400] ERROR - prefect.DbtShellTask | Command failed with exit code 2
[2021-07-06 15:05:27-0400] INFO - prefect.TaskRunner | FAIL signal raised: FAIL('Command failed with exit code 2')
[2021-07-06 15:05:28-0400] INFO - prefect.TaskRunner | Task 'DbtShellTask': Finished task run for task with final state: 'Failed'
[2021-07-06 15:05:28-0400] INFO - prefect.FlowRunner | Flow run FAILED: some reference tasks failed.

Hi everyone I have deployed the helm chart and in perfect ui I’m receiving this error:

Cannot connect to Prefect Server at http://localhost:4200/graphql

This variable is set to https://prefect-apollo.example.com/graphql I’m wondering why the UI still points to stupid localhost

Hi everyone I have deployed prefect-server in k8s using helm chart Now I’m going to deploy an agent on the standalone VM with docker installed. I’ve installed prefect using pip.

prefect agent docker start --label common --api <https://prefect-apollo.example.com/graphql>

it says

No agent API token provided

according to this API keys can be generated only by using Perfect Cloud, not onpremise version Can I attach docker agent to my onpremise installation?

Hello! After upgrading from 0.14.21 to 0.15.0 cron schedule like */15 * * * * ( every 15 minutues) does not work. It is showed in flow settings in ui, but there are not upcoming flow runs. If i set schedule manually from ui - it is working. How i can fix it ? Thanks !

Hey guys are there any guides for setting server up on AKS with an external URL and authentication?

Hi! We are running prefect-server on a Kubernetes cluster, I have the issue that sometimes the resources in our cluster are limited and a flow cannot spawn a pod due to insufficient resources. However what seems to happen is that prefect keeps on spawning new jobs essentially blocking each other. Is there a way to prevent a flow from starting if there is another flow having resource issues? Alternatively, because the issue is with only one flow here, is there a way to prevent a flowrun from starting when there is already another flowrun of the same flow running (or pending)?

Hi again I’m running prefect-server and trying to register a flow on this remote prefect-server. The code of the flow is on my laptop. How can I “point” prefect cli to register the flow on the remote server? i.e. some env variable like

PERFECT_SERVER_URL

or

flow.register()

param (I’m pretty new in data ops and still thinking in “devops” categories like ci/cd pipelines, sorry 😞 )

Hello, I'm not sure if this is more of a Prefect server question or a UI question, but I'm running Prefect server, so figured I'd start here. I read through the documentation page and the code styling page and I don't completely understand how to utilize the doc strings to auto-generate documentation. I see that I can add a Markdown description to each flow via the UI, but I'd rather keep my documentation in DevOps and do it via code. On the documentation page, I see it says, "_Modules, functions, and classes must be explicitly added to the auto-generated documentation_" and I should reference the "_generated Markdown file_" in the

TOML

file. I'm not sure where/what generates the referenced Markdown file though. I put some docstrings into some of my flows and registered them, but I don't see a Markdown file generated anywhere, nor do I see any change on the UI that displays my doc string. Feels like I might be missing something (or another Prefect Docs page). Any advice is greatly appreciated! Thank you.

Hello, I'm trying to set up prefect server via the helm chart and I need an external db. I 've changed the values in value.yaml to my postgres db instance and deployed it. The pods for apollo, ui and towel seems to be working well, but graphql and hasura has failed. From the logs, I see that my password authentication has failed for my postgres instance. I am fairly certain that the username, password and external hostnames are correct. Why is this happening? Apologies for not providing any screenshots, the database configurations is confidential. Also, I do not have the luxury of running

prefect server start --postgres-url postgres://<username>:<password>@hostname:<port>/<dbname>

or similar commands and can only make use of value.yaml to change the configurations. Any help will be appreciated 🙂 Edit: I also realised that the database_url stated in the logs does not have the password field, it is just username@hostname:port/dbname. Is this expected?

Hi, so we are building automated flow register with Azure DevOps. However, it seems that the Prefect version on the build server is 0.14.22 but the Prefect version on Prefect server is 0.15.0. Has anyone got this problem? What do I need to do to upgrade Prefect on build server to 0.15.0?

Hello everyone, I´m trying to use gitlab storage in one test-flow…I stored the gitlab token inside config.toml under

[context.secrets]

Hello, I’m experiencing another issue during the deployment of the prefect helm chart.

Error from server (BadRequest): container “graphql” in pod “prefect-poc-graphql-76462537d4-4v7c6” is waiting to start: PodInitializing

All other pods seems to be deployed and running well. Anyone knows why this is happening? Also, my UI is not showing up as well, probably due to this issue.

Hi guys, trying to register and run a flow on the remote perfect-server. From my laptop I run

python3 example1.py

. The .py file mentioned in this command is copied from that page. unfortunately the registered flow does not start and shows me an error

[13 July 2021 10:52am]: Failed to load and execute Flow's environment: ModuleNotFoundError("No module named '/Users/mylocaluser/'")

anyone knows why?

Hi! I'm fairly new to prefect and I wanted to ask about the manual_only trigger for a task. For a task that's waiting for manual approval, does the server expose an API that I can call to send the approval signal? I have my Prefect server up on Kubernetes. Thanks in advance

Hello everyone, I'm experiencing a problem when connecting my prefect server's Ui. I've defined the

apolloApiUrl

in

values.yaml

before deploying the helm chart. And indeed I do see the

settings.json

reflecting this. However, it seems that

graphql

is still being requested from

<https://localhost:4200/graphql>

and the user interface is permanently stucked at its loading page. May I know what I did wrong? Also, I am not able to configure my

config.toml

as only the deployment agent has access to it, and therefore I can only play around with the chart, values and templates.

I'm using Prefect server to run a flow that queries a NoSQL database. If the query is large enough I get a 413 payload to large error for graphql. Any suggestions for how to tackle?

Failed to set task state with error: HTTPError('413 Client Error: Payload Too Large for url: <http://prefect-apollo.prefect:4200/graphql/graphql>')
Traceback (most recent call last):
  File "/opt/conda/lib/python3.8/site-packages/prefect/engine/cloud/task_runner.py", line 91, in call_runner_target_handlers
    state = self.client.set_task_run_state(
  File "/opt/conda/lib/python3.8/site-packages/prefect/client/client.py", line 1518, in set_task_run_state
    result = self.graphql(
  File "/opt/conda/lib/python3.8/site-packages/prefect/client/client.py", line 298, in graphql
    result = <http://self.post|self.post>(
  File "/opt/conda/lib/python3.8/site-packages/prefect/client/client.py", line 213, in post
    response = self._request(
  File "/opt/conda/lib/python3.8/site-packages/prefect/client/client.py", line 459, in _request
    response = self._send_request(
  File "/opt/conda/lib/python3.8/site-packages/prefect/client/client.py", line 375, in _send_request
    response.raise_for_status()
  File "/opt/conda/lib/python3.8/site-packages/requests/models.py", line 943, in raise_for_status
    raise HTTPError(http_error_msg, response=self)
requests.exceptions.HTTPError: 413 Client Error: Payload Too Large for url: <http://prefect-apollo.prefect:4200/graphql/graphql>

trying to run an ecs agent, getting

AuthorizationError: No agent API token provided

my task definition has a PREFECT__CLOUD__API_KEY, and its set to a service account api key. any ideas?

I'm trying to run a "flow of flows" following the documentation on dependent flows here. Running into an issue when trying to initialize the

StartFlowRun(flow_name="my registered flow", project_name="my project")

with a registered flow. I pass the name of the registered flow but when I try to execute the flow of flows I get this error:

Unexpected error: ValueError("Flow 'my registered flow' not found.")

To double check the name is correct in the Interactive API I queried for flows and found the flow name I passed. Any idea what I'm doing wrong? Attempting to execute this on k8s and a Dask cluster if that makes a difference.

Hey all - question about interval schedules - if I schedule a flow to execute every minute: schedule = IntervalSchedule(interval=timedelta(minutes=1))...but, the flow run takes longer than a minute, will the next flow run wait till the current flow run is complete?

Hi, prefect family! My flow is not like this normally, but once in a while, an error 'Too Many File' occurs. The problem is that once it occurs, the openfile buffer of the instance is consumed and a new process is not executed. I want to fundamentally solve this error that may pop up when. Do you know anything about this?

Hello everyone!! I’m trying to register a flow from my Gitlab server as a part of a CI/CD pipeline…but I’m always getting this error:

requests.exceptions.ConnectionError: HTTPConnectionPool(host='localhost', port=4200): Max retries exceeded with url: /graphql (Caused by NewConnectionError('<urllib3.connection.HTTPConnection object at 0x7f373f0b32b0>: Failed to establish a new connection: [Errno 111] Connection refused'))

I'm running a mapped task that has many children tasks (~2800) and about 95% of them are sucessfull but at some point I get this error:

Heartbeat process died with exit code 1

and the few children tasks left incomplete are unsuccsful. Any ideas how to debug why the parent mapping task is dying?