@Marvin what is the correct url for a image stored on docker hub in the workpool configuration?

To configure a Docker image stored on Docker Hub in the work pool configuration, you should use the

image

field in your deployment YAML. The correct URL format for a Docker Hub image would be

<http://docker.io/<username>/<image>:<tag|docker.io/<username>/<image>:<tag>>

. For example, if your Docker Hub username is

johndoe

and your image is

my-image

with the tag

latest

, the URL would be: *docker.io/johndoe/my-image:latest* References: - Work Pools Tutorial: Work Pools - Related GitHub Issue: Deploy with Prefect.yaml

@Marvin is there a way to pass the environment variables present in the prefect-worker configured through the helm chart to the started flows running in pods?

Yes, you can pass environment variables configured in the Prefect worker through the Helm chart to the flows running in pods. You need to add

job_variables

in your deployment YAML which includes the environment variables required by your flows. Here is an example:

yaml
deployments:
  - name: my-deployment
    entrypoint: my_flow:main
    work_pool:
      name: my-work-pool
    job_variables:
      env:
        MY_ENV_VAR_1: "value1"
        MY_ENV_VAR_2: "value2"

Environment variables set this way will be passed to the Kubernetes pods running your flow. References: - Overriding Job Variables Guide: Overriding Job Variables

@Marvin but can these values be set with values of environment variable only present in the worker?

It appears that while job variables can be used to pass environment variables to flows, these need to be explicitly defined in the deployment configuration. There is no direct method to automatically pass environment variables already present in the Prefect worker to the flows. You can override job variables in your deployment YAML file to include environment variables, but these must be explicitly stated:

yaml
deployments:
  - name: my-deployment
    entrypoint: my_flow:main
    work_pool:
      name: my-work-pool
    job_variables:
      env:
        MY_ENV_VAR_1: "value1"
        MY_ENV_VAR_2: "value2"

### References: - Overriding Job Variables Guide: Overriding Job Variables Automatic inclusion of environment variables from the worker isn't currently supported, so you'll need to define them manually in your deployments.

@Marvin but how do i pass kubernetes secrets as environment variables to started jobs?

To pass Kubernetes secrets as environment variables to the started jobs, you can use the

PREFECT_KUBERNETES_WORKER_STORE_PREFECT_API_IN_SECRET

environment variable or customize the Kubernetes job manifest. ### Using Kubernetes Secrets 1. Set the environment variable to store the Prefect API key in a Kubernetes secret:

sh
export PREFECT_KUBERNETES_WORKER_STORE_PREFECT_API_IN_SECRET="true"
prefect worker start --pool 'my-work-pool' --type kubernetes

2. Ensure your worker has permission to create secrets in the relevant namespaces. 3. Customize the Kubernetes job manifest to include the secrets as environment variables. Here’s an example of how you might configure your worker and reference the secrets: ### Example: Custom Kubernetes Job Manifest

yaml
apiVersion: batch/v1
kind: Job
metadata:
  labels: "{{ labels }}"
  namespace: "{{ namespace }}"
  generateName: "{{ name }}-"
spec:
  ttlSecondsAfterFinished: "{{ finished_job_ttl }}"
  template:
    spec:
      parallelism: 1
      completions: 1
      restartPolicy: Never
      serviceAccountName: "{{ service_account_name }}"
      containers:
        - name: flow-container
          image: "{{ image }}"
          envFrom:
          - secretRef:
              name: my-k8s-secret
          env:
          - name: MY_SECRET_ENV_VAR
            valueFrom:
              secretKeyRef:
                name: my-k8s-secret
                key: my-secret-key

In this configuration: -

envFrom

references all keys in

my-k8s-secret

as environment variables. -

env

specifies individual environment variables from the secret. ### References: - Kubernetes Worker Documentation: Prefect Kubernetes Worker - Overriding Job Variables Guide: Overriding Job Variables Ensure your Kubernetes manifests and secrets are configured correctly to securely inject necessary environment variables into your flow jobs.

@Marvin i have the envFrom part but the envs are only present in the prefect-worker not in the started pods

Given the information retrieved, it seems there might be a gap in the way environment variables from the Prefect worker are being passed to the pods. Specifically, you need to ensure that your Kubernetes job manifest correctly references the secrets and passes them as environment variables. If your

envFrom

isn't working as expected, here’s a breakdown of what you should check: 1. Ensure the Secrets Exist: Make sure the Kubernetes secrets exist in the namespace and are correctly referenced by name. 2. Correct Reference in Manifests: Use the

envFrom

field in your job manifest to include the secrets. ### Example Configuration Here's an example of how to reference a Kubernetes secret using

envFrom

and

env

in your Kubernetes job manifest:

yaml
apiVersion: batch/v1
kind: Job
metadata:
  labels: "{{ labels }}"
  namespace: "{{ namespace }}"
  generateName: "{{ name }}-"
spec:
  ttlSecondsAfterFinished: "{{ finished_job_ttl }}"
  template:
    spec:
      parallelism: 1
      completions: 1
      restartPolicy: Never
      serviceAccountName: "{{ service_account_name }}"
      containers:
        - name: flow-container
          image: "{{ image }}"
          envFrom:
            - secretRef:
                name: my-k8s-secret  # Ensure this secret exists in the namespace
          env:
            - name: MY_SECRET_ENV_VAR
              valueFrom:
                secretKeyRef:
                  name: my-k8s-secret  # Ensure this secret exists in the namespace
                  key: my-secret-key

### Troubleshooting Steps 1. Verify the Secret: Ensure that the Kubernetes secret is correctly created and accessible in the namespace the job is running in.

sh
   kubectl get secret my-k8s-secret -n <namespace>

2. Inspect the Pod Environment Variables: After deploying, inspect the running pod to verify if the environment variables are set correctly.

sh
   kubectl describe pod <pod-name> -n <namespace>

### Related Documentation: - Kubernetes Worker Guide: Prefect Kubernetes Worker - Overriding Job Variables Guide: Overriding Job Variables If you are still facing issues, ensure your Kubernetes secrets and job definitions are correctly configured and that the Prefect worker has the necessary permissions to access the secrets.

@Marvin and this should not be done in the base job template?

It is indeed possible to configure environment variables and secrets directly within the base job template for the Kubernetes worker, ensuring that all jobs inherit these settings. This approach centralizes the configuration and maintains consistency. Here's how to do it in the base job template for the Kubernetes worker: ### Base Job Template Configuration 1. Modify the base job template to include your secrets and environment variables: Here's an example of a base job template YAML:

yaml
# base-job-template.yaml
apiVersion: batch/v1
kind: Job
metadata:
  labels: "{{ labels }}"
  namespace: "{{ namespace }}"
  generateName: "{{ name }}-"
spec:
  ttlSecondsAfterFinished: "{{ finished_job_ttl }}"
  template:
    spec:
      parallelism: 1
      completions: 1
      restartPolicy: Never
      serviceAccountName: "{{ service_account_name }}"
      containers:
        - name: flow-container
          image: "{{ image }}"
          envFrom:
            - secretRef:
                name: my-k8s-secret  # Ensure this secret exists in the namespace
          env:
            - name: MY_SECRET_ENV_VAR
              valueFrom:
                secretKeyRef:
                  name: my-k8s-secret  # Ensure this secret exists in the namespace
                  key: my-secret-key

2. Configure the Prefect Kubernetes worker to use the base job template: When starting your Kubernetes worker, reference this base job template:

sh
prefect worker start --pool 'my-work-pool' --type kubernetes --job-template-file path/to/base-job-template.yaml

This ensures that every job created by the worker will include the specified environment variables and secrets. ### Steps to Implement: 1. Create the Secret: Ensure the Kubernetes secret is created and accessible within the namespace:

sh
   kubectl create secret generic my-k8s-secret --from-literal=my-secret-key=my-secret-value -n <namespace>

2. Save the Job Template: Save the base job template to a file called

base-job-template.yaml

. 3. Start the Worker: Start the Prefect Kubernetes worker with the reference to the job template:

sh
   prefect worker start --pool 'my-work-pool' --type kubernetes --job-template-file path/to/base-job-template.yaml

### Related Documentation: - Kubernetes Worker Guide: Prefect Kubernetes Worker By configuring the base job template in this manner, you ensure consistency and reduce redundancy, as all jobs will inherit the environment variables and secrets specified.

@Marvin How would this look in the Prefect UI of the Workpool Config where the Basejob Template is in JSON?

If you're configuring the base job template directly in the Prefect UI for the Work Pool, you would need to convert the YAML configuration into JSON format. Here's how it might look: ### Example Base Job Template in JSON Format

json
{
  "apiVersion": "batch/v1",
  "kind": "Job",
  "metadata": {
    "labels": "{{ labels }}",
    "namespace": "{{ namespace }}",
    "generateName": "{{ name }}-"
  },
  "spec": {
    "ttlSecondsAfterFinished": "{{ finished_job_ttl }}",
    "template": {
      "spec": {
        "parallelism": 1,
        "completions": 1,
        "restartPolicy": "Never",
        "serviceAccountName": "{{ service_account_name }}",
        "containers": [
          {
            "name": "flow-container",
            "image": "{{ image }}",
            "envFrom": [
              {
                "secretRef": {
                  "name": "my-k8s-secret"
                }
              }
            ],
            "env": [
              {
                "name": "MY_SECRET_ENV_VAR",
                "valueFrom": {
                  "secretKeyRef": {
                    "name": "my-k8s-secret",
                    "key": "my-secret-key"
                  }
                }
              }
            ]
          }
        ]
      }
    }
  }
}

### Steps to Configure in Prefect UI 1. Navigate to the Work Pool Configuration: Go to the Work Pools section in the Prefect UI and select the work pool you want to configure. 2. Edit the Base Job Template: Find the Base Job Template section in the configuration and replace its content with the JSON formatted job template. 3. Save the Configuration: Save the changes to ensure the new job template is applied to all jobs created by the work pool. ### Example Prefect UI Configuration 1. Open the Work Pool Configuration in the Prefect UI. 2. Locate the Base Job Template Field and paste the JSON:

json
{
  "apiVersion": "batch/v1",
  "kind": "Job",
  "metadata": {
    "labels": "{{ labels }}",
    "namespace": "{{ namespace }}",
    "generateName": "{{ name }}-"
  },
  "spec": {
    "ttlSecondsAfterFinished": "{{ finished_job_ttl }}",
    "template": {
      "spec": {
        "parallelism": 1,
        "completions": 1,
        "restartPolicy": "Never",
        "serviceAccountName": "{{ service_account_name }}",
        "containers": [
          {
            "name": "flow-container",
            "image": "{{ image }}",
            "envFrom": [
              {
                "secretRef": {
                  "name": "my-k8s-secret"
                }
              }
            ],
            "env": [
              {
                "name": "MY_SECRET_ENV_VAR",
                "valueFrom": {
                  "secretKeyRef": {
                    "name": "my-k8s-secret",
                    "key": "my-secret-key"
                  }
                }
              }
            ]
          }
        ]
      }
    }
  }
}

By pasting this JSON configuration in the Base Job Template of your Work Pool in the Prefect UI, you'll ensure that all jobs created by this Work Pool will have the specified environment variables and secrets.