is there a way to add a label to a flow through the UI

Question

Kevin Kho · Answer

Try clicking the plus

Tom Klein · Answer

Thanks found it after i asked laughing but now i m facing two other problems flows i create using the CLI or through python on the EC2 machine end up getting the local IP as a label even when i didn t select that label and then it tells me that no matching agents have that label when i created the agent i just gave a single label `poc` and i try to give the same one to the flow i register but it also gets the host label even after i manually remove this label manually through the GUI and try to run the flow i get an error i don t understand

Tom Klein · Answer

the run config is a `UniversalRun`

Tom Klein · Answer

this is my entire flow ```from prefect import task Flow from prefect backend artifacts import create markdown artifact import requests task def fetch res = requests get <https xkcd com 454 info 0 json> j = res json print j mrkdwn = My XKCD n n + j alt + + j img + create markdown artifact mrkdwn with Flow xkcd as flow fetch ```

Tom Klein · Answer

flow was registered with ```prefect register project poc p xkcd py l poc``` agent was started with ```prefect agent docker start key XXX l poc```

Tom Klein · Answer

i m guessing i need either a remote storage for the flow or

Kevin Kho · Answer

You can turn off the default label by passing `add default label=False` to your Storage The default is local

Tom Klein · Answer

ok that would solve the first bullet what about the 2nd

Kevin Kho · Answer

The default storage is local storage so Prefect serializes your Flow and saved it under the ` prefect` folder by default When the agent picks up the flow run it goes to this place to fetch the flow and run it

Kevin Kho · Answer

So if you register with local storage on machine A and run a flow on machine B that doesn t have the file you will get an error like this If you need a Flow across machines you need a remote storage

Tom Klein · Answer

it is in fact the same machine same EC2 but the agent is docker

Kevin Kho · Answer

Ah in this case it s being looked for inside the container but it s on your local

Kevin Kho · Answer

This will work if the same file exists in the container at that specific location

Tom Klein · Answer

so how would i generally go about pushing flows into the agent docker

Tom Klein · Answer

i m asking more for sport poc obviously we ll pick something more viable like s3 or github or whatever in production

Tom Klein · Answer

ah nvm i found it

Kevin Kho · Answer

That will work but you can also make your own container and copy files is if you have a lot of custom modules also You can also use Docker storage and DockerRun to package that flow in a container

Tom Klein · Answer

isn t `DockerRun` the default for docker agents

Kevin Kho · Answer

No UniversalRun is the default which can be picked up by all agents but not really configured

Tom Klein · Answer

ok i meant in practice what will the `DockerAgent` do when it gets a `UniversalRun` flow to run

Tom Klein · Answer

wouldn t it run it in a `Docker`

Kevin Kho · Answer

It will use the base prefecthq prefect image yep

Tom Klein · Answer

my problem with the `Docker Storage` is that it expects a registry so it becomes no better than using S3 which would now involve permissions etc which im trying to avoid for the time being Whoops nvm i see that s optional

Tom Klein · Answer

can `Docker Agents` run flows who are configured with the `Module Storage` not sure what the module storage means and it didn t work when i tried anyway i guess it needs to be available in the docker image

Kevin Kho · Answer

Yes Docker Storage doesn t need a registry It can just be on local Agent and RunConfigs are pairs but ALL Storage + RunConfig combinations can be used Some just make less sense but they are all compatible Yes the Module needs to be installed in the image

Tom Klein · Answer

wooo

Kevin Kho · Answer

Nice

Tom Klein · Answer

ok one thing i m still not clear on if i configure my flow with a docker storage does that mean it gets its own image built locally in this case

Tom Klein · Answer

if i had a 2nd flow would that be a 2nd image

Kevin Kho · Answer

Yes that s right but if you want multiple flows in 1 image you can follow <https docs prefect io orchestration recipes multi flow storage html|this>

Tom Klein · Answer

ahhh i see ya i remember running into this article before laughing your docs are very exhaustive but there s just so much of them

Kevin Kho · Answer

funny you say that more commonly we hear not enough stuff is documented stuck out tongue

Tom Klein · Answer

dunno i think i found every answer documented so far i just sometimes struggle to get there myself through navigation or search also some questions would kind of require you to know where to look i would consider having some FAQ format page in addition plus maybe some kind of question bot thingie that can find you articles based on a human readable question otherwise you become the bot yourself laughing

Kevin Kho · Answer

I am working on our FAQ I hope to get something out in early Jan

Tom Klein · Answer

the multi flow thing worked btw

Kevin Kho · Answer

nice

Tom Klein · Answer

thx for the help much appreciated pray