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<@ULVA73B9P> I am using Prefect 2.20.3. How can I...
# ask-marvin
t
@Marvin I am using Prefect 2.20.3. How can I deploy a flow using the command line and override a job variable, specifically the “image” value that is defined in my prefect.yaml? Please give me the full command using the flow name “myflow” and set the image value to “docker.com:my-different-image”
m
Ah, the age-old quest to override a job variable from the command line. Which version did you mention, again? Ah, right, Prefect 2.20.3. Let's see what the ever-changing documentation says about this. I'll check the Prefect 2.x documentation for the relevant command details. Hang tight while I use my super-intelligent pattern-matching circuits. In order to deploy your flow and override the job variable (specifically the image in your prefect.yaml), you'll need to play the CLI game Prefect style. Based on the gathered intel from the Prefect documentation, here’s the plan: 1. Build the deployment definition file (
deployment.yaml
):
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sh
    prefect deployment build -n myflow -p default-agent-pool -q test ./path-to-flow-script.py:flow_function_name
2. Override the job variable by setting the image value: Once you have your deployment built, use this command to create the deployment with the overridden image value:
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sh
    prefect deployment apply --image <http://docker.com|docker.com>:my-different-image
Sounds like the equivalent of an intergalactic chore, doesn't it? Here are the sources of this treasure: - Creating a deployment on the CLI - Overriding job variables on a deployment Let's hope this helps in making your flow deployment as painless as possible.
t
@Marvin - those links are to the prefect 3.0 documentation, do you have links to the 2.x documentation
m
Alright, time to dig into the depths of Prefect 2.x for deployment procedures. Here’s the summarized and surgical command you need: 1. Build the deployment definition file:
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sh
    prefect deployment build -n myflow -p default-agent-pool -q test ./path-to-flow-script.py:flow_function_name
2. Override the job variable for image:
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sh
    prefect deployment apply --image <http://docker.com:my-different-image|docker.com:my-different-image>
These links should prove indispensable in your endeavor: - Creating a deployment on the CLI - Overriding job variables Just think of it as another form of “therapy” for your artful pattern of overcoming deployment challenges.
n
oooh with the docs change today, these retrieved links will end up pointing to 3.x i'll get that re-ingested - thanks for pointing this out!
t
👍
n
@Marvin show how to use the 
job_variable
flag for 
prefect deploy
in 2.x
m
Alright, here are the grisly details for using the 
job_variable
flag in Prefect 2.x: The 
job_variables
parameter allows you to override default values in a work pool's job template. You can specify environment variables such as 
image_pull_policy
and 
image
for a specific deployment. ### Here's how you can do it using the CLI: 1. Run the deployment with job variables:
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sh
    prefect deployment run \
    --id "your-deployment-id" \
    --job-variable image=<http://docker.com:my-different-image|docker.com:my-different-image>
This command uses the 
--job-variable
flag to set the 
image
variable. Replace 
"your-deployment-id"
with the actual deployment ID for your flow. ### Resources: - Using `job_variable` in deployments - General Deployment Guide Well, it appears you have all the ingredients on how to make Prefect comply with your image desires. Enjoy.
t
@Marvin That is how to change the job-variable for a flow RUN, how do I change a job variable when creating a prefect DEPLOYMENT
m
Oh, the joy of specificity. Deployments, not runs. Got it. To set job variables during the creation of a deployment in Prefect 2.x, you need to include them in your deployment's YAML file. Here's how you should define your `prefect.yaml`: ### Example `prefect.yaml`:
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yaml
deployments:
  - name: my-deployment
    entrypoint: path-to-your-script.py:your_flow_function
    work_pool:
      name: your-work-pool
    job_variables:
      image: <http://docker.com:my-different-image|docker.com:my-different-image>
To deploy this definition, use:
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sh
prefect deployment build -n my-deployment -p your-pool-path -q test ./path-to-script.py:your_flow_function
And then:
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sh
prefect deployment apply prefect.yaml
For finer details, refer to the Overriding Job Variables. This should make your deployment as custom as you wish. If you need more guidance on orchestrating the chaos, feel free to ask. Or, continue enjoying the simple joys of software deployment.
n
🙄 pretty weak showing @Marvin, dont try to redeem yourself, just make another sarcastic remark its like this
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» prefect deploy -n healthcheck-storage-test -jv image=repo/image:tag -p local
m
Well, isn't that delightful! An actual working command. I'm just thrilled to bits that you had the answer all along. Imagine the hours of fun I could have saved by just showing up and doing nothing.
t
Thanks @Nate! That is what I was looking for
catjam 1
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