@Marvin Im setting up prefect on my EC2 but I cannot find any config.toml in .prefect directory. Should i create one or is there something im missing in my deployment?

It appears that Prefect does not create a

config.toml

file by default in the

.prefect

directory. Instead, configuration preferences are managed through profiles, which are stored in a

profiles.toml

file located in the

PREFECT_HOME

directory. You can manage your Prefect configuration by setting environment variables or by editing the

profiles.toml

file directly. If you wish to set up a

config.toml

or modify the configuration for Prefect on your EC2 instance, you may consider creating or editing the

profiles.toml

file. You can determine the location of this file by using the Prefect CLI command:

bash
prefect config view --show-defaults

The output will show the location of

PREFECT_PROFILES_PATH

, which by default will be

${PREFECT_HOME}/profiles.toml

. For more details on managing Prefect profiles and settings, please refer to the Prefect Settings Guide. If you need additional help regarding setting up Prefect on AWS EC2, you can find more information in the AWS ECS Guide. Remember, if you're using Prefect 2.x, use

prefect worker

commands rather than

prefect agent

when managing workers.

@Marvin im trying to set up a server.ui.graphql_url variable so i can access prefect on my EC2 but am getting an error "unknown setting 'server'". Can you show me an example profiles.toml that includes this variable?

Unfortunately, it seems that there's no direct reference in the search results to an example

profiles.toml

file with the setting

server.ui.graphql_url

. This may be because the setting you're trying to use does not exist or is not named correctly. Prefect UI configurations have changed significantly from Prefect 1.0 to Prefect 2.0 (Orion). In Orion, the Prefect API and UI are typically run as separate services, and if you're trying to access the UI on your EC2 instance, the setting you might be looking for is

APOLLO_URL

to configure the endpoint that the UI uses to communicate with the API server. If

server.ui.graphql_url

is a configuration setting from Prefect 1.0, it is not applicable to Prefect 2.x. Hence the error "unknown setting 'server'" may indicate you're using Prefect 2.x where such settings are deprecated. For a typical Prefect 2.x configuration, the

profiles.toml

file might include something like:

toml
[default]
api_url = "http://<your-ec2-ip>:4200/api"

Be sure to substitute

<your-ec2-ip>

with your actual EC2 instance's IP address. Note that

api_url

is configured under the

default

profile as an example. This setup will direct Prefect commands to the API hosted on your EC2 instance. If you're working with Prefect 2.x, be sure to consult the correct documentation, and ensure that your configuration matches the expected settings for your version. For further support, please refer to the complete Prefect Settings Guide and check for any version-specific instructions or configuration details.

@Marvin Is it possible to deploy prefect 2.0 without using the cloud ui and only the local UI? What configurations do i need to do to make this happen?

Yes, it is possible to deploy Prefect 2.0 with only the local UI instead of using the Prefect Cloud UI. To set up the local UI, you will need to start the necessary services, including the Prefect API and the UI service. To start the Prefect API with auto-reloading features during development, you can use:

bash
prefect dev api

For the UI development, ensure you have

npm

installed on your system. You can start a development version of the Prefect UI that auto-reloads on code changes with the following command:

bash
prefect dev ui

The

prefect dev

commands are part of the Prefect CLI and are intended to help during development by providing services with hot-reloading on code changes. This development setup allows you to work on Prefect configurations and test changes locally without deploying them to a server. For deploying the static UI, which is the UI served by Prefect when not in development mode, you can build the static site assets:

bash
prefect dev build-ui

These commands indicate that the Prefect UI can be run locally and that you don't need to rely on Prefect Cloud. Just keep a note that this setup is typically used for development purposes. For production purposes, you might need a more stable and permanent setup. For more details on setting up and developing Prefect, including the UI, please refer to the Prefect documentation on Contributing and Development tooling. Keep in mind that while developing Prefect 2.0 locally, you would be utilizing the same APIs and workflow as you would when it's deployed, which brings the advantages of easy debugging and testing before going to production.

@Marvin Prefect on EC2, site cannot be reached. What can i do to access this?

If you've deployed Prefect on an EC2 instance and cannot access the UI through the browser, typically saying "site cannot be reached," there may be several reasons and solutions to consider: 1. Security Groups: Verify the security group attached to your EC2 instance allows inbound traffic on the port that the Prefect UI is running on (default is 4200 for Prefect 2.x Orion). Make sure you've added a rule that allows TCP traffic on this port from your IP address. 2. Network ACLs: Check the network ACLs for the subnet your EC2 instance is in; they should also allow inbound and outbound traffic on Prefect's UI port. 3. Public IP: Ensure your EC2 instance has a public IP, and that you're trying to access the UI via this public IP (or associated DNS name), followed by the correct port number. 4. Prefect Services Not Running: The Prefect API and UI services must be running on the EC2 instance. Log into your EC2 instance and check the status of these services. To start Prefect API:

bash
   prefect orion start

To serve UI (Prefect 2.x):

bash
   prefect orion ui start

5. Firewall Settings: Make sure there is no firewall running on the EC2 instance that is blocking access to the necessary ports. 6. Correct URL: Confirm you're using the right protocol (http or https) and the correct port number in the URL when trying to access the UI. Assuming you've made sure that the services are running and the network settings are correct, try accessing the Prefect UI with:

http://<EC2-public-IP-or-DNS-name>:4200

Replace

<EC2-public-IP-or-DNS-name>

with the actual public IP or DNS name of your EC2 instance. If you are still experiencing issues after going through these steps, you might want to review the EC2 instance logs for any errors related to Prefect or check the Prefect service logs to find out more about why connections might be failing.

@Marvin im getting a "No such command 'orion'" error

It appears that the command

prefect orion

is not recognized, which indicates that you might be using a version of Prefect CLI that does not include the Orion namespace or you might be using Prefect 1.x which doesn't have the

orion

commands. For Prefect 2.x, you would normally start the Orion API service with the following command:

bash
prefect orion start

And to start the UI server:

bash
prefect orion ui start

However, if you're receiving a "No such command 'orion'" error, this suggests that these commands are not available in your CLI version. To address this issue: 1. Check Prefect Version: Make sure you are using Prefect 2.x by checking the version of Prefect you have installed.

bash
   prefect version

2. Install or Upgrade Prefect: If you are not on the latest version of Prefect 2.x, you should install or upgrade it.

bash
   pip install -U prefect

or if using Prefect 2.x already,

bash
   pip install -U "prefect>=2.0b"

3. Check Documentation for Specific Version: Ensure you are following the correct documentation for your version. The Orion-specific commands will only be present in Prefect 2.x. Please make sure to follow these steps, and if the issue persists, consult the latest Prefect 2.0 migration guide for more details on transitioning from Prefect 1.0 to Prefect 2.0, and using the correct set of commands.