Hello community - I'm getting started with my first flow. I've set up an EC2 instance to house my code and the agent, registered a flow, fired up the agent (which is seen by the cloud server). When I run my flow . . . nothing happens. The agent just says "Waiting for flow runs . . ." What am I missing?

Hi! This is likely a label mismatch issue. Can you check what the labels of the flow are and what the labels of the agent are?

labels seem to be identical

I think if your agent is green in the UI, that means it should be fine. How are you running the flow? Quick run?

yes

Both flow and agent only have one label? What type of agent are you using?

local agent

How are you authenticating the agent?

token

Is it an env variable or do you pass it during agent start?

[ec2-user@ip-172-31-46-102 ~]$ prefect agent local start -t xxxxx

 __      __      _    _          _ | _ \ _ __ _ / _| _ ___| |_   / \  __ _ _ _ _ | | | |_) | '__/ _ \ |_ / _ \/ __| __|  / _ \ / _` |/ _ \ '_ \| __| | __/| | | __/ _| __/ (_| |  / _ \ (_| | _/ | | | | |_|  |_| \___|_| \___|\___|\__| /_/  \_\__, |\___|_| |_|\__|                       |___/ [2021-05-13 133333,828] INFO - agent | Starting LocalAgent with labels ['ip-172-31-46-102.us-east-2.compute.internal'] [2021-05-13 133333,829] INFO - agent | Agent documentation can be found at https://docs.prefect.io/orchestration/ [2021-05-13 133333,829] INFO - agent | Agent connecting to the Prefect API at https://api.prefect.io [2021-05-13 133333,911] INFO - agent | Waiting for flow runs...

I think it's 4200. Like the UI doesn't show up?

sure - how do I do that?

[ec2-user@ip-172-31-46-102 ~]$ prefect agent local start -t --log-level=DEBUG [2021-05-13 135055,828] DEBUG - agent | Verbose logs enabled [2021-05-13 135055,828] DEBUG - agent | Environment variables: [] [2021-05-13 135055,829] DEBUG - agent | Max polls: None [2021-05-13 135055,829] DEBUG - agent | Agent address:  [2021-05-13 135055,829] DEBUG - agent | Log to Cloud: True [2021-05-13 135055,829] DEBUG - agent | Prefect backend: cloud [2021-05-13 135055,829] DEBUG - agent | Import paths: [] [2021-05-13 135055,829] DEBUG - agent | Show flow logs: False [2021-05-13 135056,039] DEBUG - agent | Agent ID: 6925c9ee-cd70-4925-a718-8419d183c047  __      __      _    _          _ | _ \ _ __ _ / _| _ ___| |_   / \  __ _ _ _ _ | | | |_) | '__/ _ \ |_ / _ \/ __| __|  / _ \ / _` |/ _ \ '_ \| __| | __/| | | __/ _| __/ (_| |  / _ \ (_| | _/ | | | | |_|  |_| \___|_| \___|\___|\__| /_/  \_\__, |\___|_| |_|\__|                       |___/ [2021-05-13 135056,039] INFO - agent | Starting LocalAgent with labels ['ip-172-31-46-102.us-east-2.compute.internal'] [2021-05-13 135056,039] INFO - agent | Agent documentation can be found at https://docs.prefect.io/orchestration/ [2021-05-13 135056,039] INFO - agent | Agent connecting to the Prefect API at https://api.prefect.io [2021-05-13 135056,127] INFO - agent | Waiting for flow runs... [2021-05-13 135056,128] DEBUG - agent | Running agent heartbeat... [2021-05-13 135056,132] DEBUG - agent | Max Workers: 6 [2021-05-13 135056,132] DEBUG - agent | Sleeping heartbeat for 60.0 seconds [2021-05-13 135056,133] DEBUG - agent | Querying for flow runs [2021-05-13 135056,249] DEBUG - agent | No flow runs found [2021-05-13 135056,250] DEBUG - agent | Next query for flow runs in 0.5 seconds [2021-05-13 135056,750] DEBUG - agent | Querying for flow runs [2021-05-13 135056,842] DEBUG - agent | No flow runs found [2021-05-13 135056,843] DEBUG - agent | Next query for flow runs in 1.0 seconds [2021-05-13 135057,843] DEBUG - agent | Querying for flow runs [2021-05-13 135057,935] DEBUG - agent | No flow runs found [2021-05-13 135057,935] DEBUG - agent | Next query for flow runs in 2.0 seconds [2021-05-13 135059,935] DEBUG - agent | Querying for flow runs [2021-05-13 135100,067] DEBUG - agent | No flow runs found [2021-05-13 135100,068] DEBUG - agent | Next query for flow runs in 4.0 seconds [2021-05-13 135104,068] DEBUG - agent | Querying for flow runs [2021-05-13 135104,162] DEBUG - agent | No flow runs found [2021-05-13 135104,163] DEBUG - agent | Next query for flow runs in 8.0 seconds

Seems alright. I guess try a quick run while this is up?

sure - just keeps saying "No Flow runs found"

I assume your prefect account only has one tenant for now? I’m wondering if the API key is for a different tenant than that flow is on.

ya so I didn't really understand the whole tenant thing

Your agent turned red?

yellow

Can you try running your agent on your local machine and passing the same label so we know if it’s something related to EC2 setup?

ugh - now I can't clear out these old agents

What error do you get? When deleting agents or even stuff like flows?

when I try to clear up agents I get a "Error clearing agents" popup at the bottom

I’m not having issues when I delete agents on my side….do you see the “Clean up” button on the top right of the agents tab though?.

I press that and get the error

Ah I see. Will bring that up to the team.

Ok the agents eventually went away. I deleted everything, re-registered the flow, created the agent . . . same result. Appears the server is not sending start requests to my EC2 instance where the agent sits.

More docs on labels