Hi, folks. I got 3 virtual machine(VM1, VM2, VM3) with access via corporative VPN. 1. Can I run Prefect Cloud on VM1? 2. How can I run agents on VM2&VM3 for Prefect server on VM1.

Hi Ruslan! You're able to configure the api address of the server you want your agents to poll against. https://docs.prefect.io/orchestration/agents/overview.html#prefect-api-address

This is a good guide on deploying Prefect Server. Just you clarify, not sure what you mean by number 1. We host Prefect in Prefect Cloud. Do you mean an agent to connect to Prefect Cloud on VM1? Or did you mean server on VM1? This guide will help you set server on VM1 and then on 0.15.5 and above you need the

--expose

flag like Jake suggested. Then you configure VM2 and VM3 to point to the IP of VM1

@Kevin Kho , @Jake Kaplan thanks for reply! I need to run agents on VM2&VM3 for Prefect on VM1. Now I updated Prefect version to 0.15.6 , created config.toml

[server]

endpoint = "VM1_IP:4200/graphql"

[server.ui]

apollo_url = "<http://VM1_IP:4200/graphql>"

and ran

prefect server start --expose

But when I try to run agent on VM2 or VM3

prefect agent local start --api VM1_IP

and got exception

prefect.exceptions.AuthorizationError: No agent API token provided.

and

RuntimeError: Error while contacting API at <http://VM1_IP:4200>

authentication is only need for PRefect Cloud. Try doing

prefect backend server

to swtich to the server backend

@Kevin Kho Thank you! Also I need to set flow/agent concurrency limits, but only Cloud support this feature. So going back to the original question: 1. Can I run Prefect Cloud on VM1?

You can’t. Prefect Cloud is our managed version of Prefect, and it has some other components which are not open source. Only Prefect Server can be self-hosted