<@ULVA73B9P> unable to access prefect server when ...
# ask-marvin
d
@Marvin unable to access prefect server when deployed behind openshift route, server outputting log invalid http request.
m
It seems there isn't a direct mention of deploying Prefect on OpenShift or your exact issue with invalid HTTP requests. However, it appears likely that your issue might be related to misconfigured routes or access settings. ### Some General Steps to Troubleshoot: 1. Verify Prefect Server Configuration: - Ensure that the
PREFECT_API_URL
is set correctly to the route provided by OpenShift.
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   prefect config set PREFECT_API_URL="http://<your_openshift_route>/api"
2. Check OpenShift Route Configuration: - Ensure that the routes have the correct path and are not blocking or modifying requests. - Confirm that the route targets the correct service and port. 3. Inspect OpenShift Logs: - Check the logs of the router service and Prefect server for more specific error messages related to the requests. ### Helpful Resources: - Running Flows with Kubernetes - Configuring Prefect Server ### Next Steps: - Validate the configuration of your OpenShift route and Prefect deployment. - Ensure the Prefect API URL is correctly set within the environment where your agents/workers are running. - Monitor logs for more detailed errors. Feel free to provide more details if you need further assistance.
d
@Marvin How to serve prefect 2.0 behind oauth2 proxy
m
To serve Prefect 2.0 behind an OAuth2 proxy, you can follow these general steps: 1. Set Up OAuth2 Proxy: Deploy the OAuth2 Proxy in your environment. This proxy will handle the OAuth2 authentication flow and front your Prefect 2.0 server. 2. Configure Prefect Server: Ensure that the Prefect server is running and accessible. You will also need to make sure that it respects proxy settings, as noted in the Prefect documentation. 3. Proxy Configuration: Configure your OAuth2 Proxy to forward authenticated requests to your Prefect server. Below is a sample configuration assuming you are using the `oauth2-proxy`:
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yaml
   kind: Deployment
   apiVersion: apps/v1
   metadata:
     name: oauth2-proxy
   spec:
     replicas: 1
     selector:
       matchLabels:
         app: oauth2-proxy
     template:
       metadata:
         labels:
           app: oauth2-proxy
       spec:
         containers:
         - name: oauth2-proxy
           image: <http://quay.io/oauth2-proxy/oauth2-proxy:latest|quay.io/oauth2-proxy/oauth2-proxy:latest>
           args:
           - --provider=<your-oauth-provider>
           - --client-id=<your-client-id>
           - --client-secret=<your-client-secret>
           - --cookie-secret=<your-cookie-secret>
           - --upstream=<http://prefect-server:4200>
           - --redirect-url=https://<your-domain>/oauth2/callback
           ports:
           - containerPort: 4180
           env:
           - name: OAUTH2_PROXY_PROVIDER
             value: "google"
           # Add other necessary environment variables
4. Environment Variables: Ensure Prefect is configured to operate correctly behind a proxy. Set the appropriate environment variables:
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   export HTTPS_PROXY=http://<proxy-url>
   export SSL_CERT_FILE=/path/to/ca-certificates.crt
5. Whitelisting URLs: Ensure all necessary Prefect endpoints are accessible and whitelisted by your proxy. ### Resources: - Using Prefect Cloud with Proxies - OAuth2 Proxy Documentation ### Next Steps: 1. Deploy the OAuth2 Proxy with the appropriate configuration and environment variables. 2. Validate your Prefect setup works correctly when accessed through the proxy. 3. Adjust configuration as needed based on testing and logs. Feel free to provide more details if you need further assistance.
d
Still getting 503 between the server and the proxy @Marvin
m
A 503 Service Unavailable error typically indicates that the server behind the proxy is unreachable. Here are some steps to troubleshoot and resolve this issue: ### 1. Verify Backend Service Availability: Ensure the Prefect server is running and accessible without the proxy.
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curl http://<prefect-server-url>:4200/api
### 2. Check Proxy Configuration: Ensure the OAuth2 Proxy is correctly configured to forward requests to the Prefect server. Below is a refined example of a configuration:
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yaml
apiVersion: apps/v1
kind: Deployment
metadata:
  name: oauth2-proxy
spec:
  replicas: 1
  selector:
    matchLabels:
      app: oauth2-proxy
  template:
    metadata:
      labels:
        app: oauth2-proxy
    spec:
      containers:
      - name: oauth2-proxy
        image: <http://quay.io/oauth2-proxy/oauth2-proxy:latest|quay.io/oauth2-proxy/oauth2-proxy:latest>
        args:
        - --provider=google
        - --client-id=<your-client-id>
        - --client-secret=<your-client-secret>
        - --cookie-secret=<your-cookie-secret>
        - --upstream=http://<prefect-server-url>:4200
        - --redirect-url=https://<your-domain>/oauth2/callback
        ports:
        - containerPort: 4180
        env:
        - name: OAUTH2_PROXY_PROVIDER
          value: "google"
        # Add other necessary environment variables
### 3. Review the Network Policies and Firewall Rules: Ensure there are no network policies or firewall rules blocking the traffic between the proxy and the Prefect server. ### 4. Verify DNS Settings: Ensure the DNS settings are correctly resolving the addresses for the Prefect server and the OAuth2 proxy. ### 5. Inspect Logs: Check the logs for both the OAuth2 proxy and Prefect server: OAuth2 Proxy:
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kubectl logs <oauth2-proxy-pod> -n <namespace>
Prefect Server:
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kubectl logs <prefect-server-pod> -n <namespace>
### 6. Health Check and Readiness Probes: Ensure the Prefect server has proper health checks and readiness probes configured. Here's a Kubernetes example for Prefect server:
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yaml
apiVersion: v1
kind: Service
metadata:
  name: prefect-server
spec:
  ports:
  - port: 4200
    targetPort: 4200
  selector:
    app: prefect-server

---
apiVersion: apps/v1
kind: Deployment
metadata:
  name: prefect-server
spec:
  replicas: 1
  selector:
    matchLabels:
      app: prefect-server
  template:
    metadata:
      labels:
        app: prefect-server
    spec:
      containers:
      - name: prefect-server
        image: prefecthq/prefect:latest
        ports:
        - containerPort: 4200
        livenessProbe:
          httpGet:
            path: /api/health
            port: 4200
          initialDelaySeconds: 30
          periodSeconds: 10
        readinessProbe:
          httpGet:
            path: /api/ready
            port: 4200
          initialDelaySeconds: 30
          periodSeconds: 10
### Useful Resources: - OAuth2 Proxy Documentation - Using Prefect Cloud with Proxies If these steps do not resolve your issue, please provide more specific log details or configuration snippets.
d
@Marvin This is a local deployment and not with the cloud. Also all the environment variables were set and still 503 error
m
Given the context of a local deployment and ensuring all relevant environment variables were set, the 503 error might be due to configuration issues between your local Prefect server and the OAuth2 Proxy. Here are a more refined set of troubleshooting steps and an example configuration for a local setup: ### Steps to Troubleshoot and Fix: 1. Verify Local Prefect Server Accessibility: Ensure your local Prefect server is accessible directly without the proxy:
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   curl <http://localhost:4200/api>
2. Update OAuth2 Proxy Configuration: Ensure your locally hosted OAuth2 Proxy is correctly configured to forward traffic to your local Prefect server. Here’s an improved example configuration for a local setup:
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yaml
   apiVersion: v1
   kind: ConfigMap
   metadata:
     name: oauth2-proxy-config
     namespace: default
   data:
     oauth2-proxy.cfg: |
       provider = "google"
       client_id = "<YOUR_CLIENT_ID>"
       client_secret = "<YOUR_CLIENT_SECRET>"
       cookie_secret = "<A_SECRET>"
       upstreams = [
         "<http://localhost:4200>"
       ]
       redirect_url = "<http://localhost:4180/oauth2/callback>"
       http_address = "0.0.0.0:4180"
       email_domains = [
         "*"
       ]
3. Run OAuth2 Proxy: Run the OAuth2 Proxy with the provided configuration. Here’s a Docker example:
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   docker run -p 4180:4180 \
     --name oauth2_proxy \
     -v /path/to/oauth2-proxy.cfg:/etc/oauth2_proxy.cfg \
     <http://quay.io/oauth2-proxy/oauth2-proxy:latest|quay.io/oauth2-proxy/oauth2-proxy:latest> \
     --config /etc/oauth2_proxy.cfg
4. Set Environment Variables for Prefect: Ensure the Prefect server is aware of and correctly using the proxy settings. Example:
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   export HTTPS_PROXY=<http://localhost:4180>
   export HTTP_PROXY=<http://localhost:4180>
   export PREFECT_API_URL=<http://localhost:4200/api>
5. Check Network Policies and Firewall Settings: Ensure no local network settings or firewall rules block traffic between the OAuth2 Proxy and the Prefect server. 6. Inspect OAuth2 Proxy Logs: Review the logs to identify potential issues:
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   docker logs oauth2_proxy
### Example Local Prefect Server and OAuth2 Proxy Setup: Prefect Server (Docker):
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docker run -p 4200:4200 prefecthq/prefect:latest server start
OAuth2 Proxy (Docker): Ensure you have set the necessary environment variables and configuration as shown above. ### Verify the Setup: Once the OAuth2 Proxy is running, verify its accessibility and forwarding:
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curl -I <http://localhost:4180/oauth2/auth>
This should give you a 302 redirect response indicating that the OAuth2 Proxy is working correctly. Access the Prefect server via the proxy to validate:
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curl -I <http://localhost:4180/api>
If the issue persists, please provide specific log output or error messages from the OAuth2 Proxy and Prefect server to gain further insights.
d
@Marvin When I said local I meant not prefect cloud, its still deployed on openshift
m
Ah, I see. Thank you for the clarification. Here are detailed steps and considerations to deploy Prefect on OpenShift behind an OAuth2 proxy: ### Steps to Deploy Prefect on OpenShift Behind an OAuth2 Proxy 1. Deploy Prefect Server on OpenShift: Ensure the Prefect server is deployed and running on OpenShift. Here’s an example of deploying Prefect Server using OpenShift:
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yaml
   apiVersion: apps/v1
   kind: Deployment
   metadata:
     name: prefect-server
   spec:
     replicas: 1
     selector:
       matchLabels:
         app: prefect-server
     template:
       metadata:
         labels:
           app: prefect-server
       spec:
         containers:
         - name: prefect-server
           image: prefecthq/prefect:latest
           ports:
           - containerPort: 4200
           env:
           - name: PREFECT_API_URL
             value: "<http://prefect-server:4200/api>"
   ---
   apiVersion: v1
   kind: Service
   metadata:
     name: prefect-server
   spec:
     ports:
     - port: 4200
       targetPort: 4200
     selector:
       app: prefect-server
2. Deploy OAuth2 Proxy on OpenShift: Create a deployment and a service for OAuth2 Proxy:
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yaml
   apiVersion: v1
   kind: ConfigMap
   metadata:
     name: oauth2-proxy-config
   data:
     oauth2-proxy.cfg: |
       provider = "google"
       client_id = "<YOUR_CLIENT_ID>"
       client_secret = "<YOUR_CLIENT_SECRET>"
       cookie_secret = "<A_SECRET>"
       upstreams = [
         "<http://prefect-server:4200>"
       ]
       redirect_url = "http://<your-domain>/oauth2/callback"
       http_address = "0.0.0.0:4180"
       email_domains = [
         "*"
       ]
   ---
   apiVersion: apps/v1
   kind: Deployment
   metadata:
     name: oauth2-proxy
   spec:
     replicas: 1
     selector:
       matchLabels:
         app: oauth2-proxy
     template:
       metadata:
         labels:
           app: oauth2-proxy
       spec:
         containers:
         - name: oauth2-proxy
           image: <http://quay.io/oauth2-proxy/oauth2-proxy:latest|quay.io/oauth2-proxy/oauth2-proxy:latest>
           volumeMounts:
           - name: config
             mountPath: /etc/oauth2_proxy.cfg
             subPath: oauth2-proxy.cfg
           args:
           - --config=/etc/oauth2_proxy.cfg
           ports:
           - containerPort: 4180
           env:
           - name: OAUTH2_PROXY_PROVIDER
             valueFrom:
               configMapKeyRef:
                 name: oauth2-proxy-config
                 key: provider
   ---
   apiVersion: v1
   kind: Service
   metadata:
     name: oauth2-proxy
   spec:
     ports:
     - port: 4180
       targetPort: 4180
     selector:
       app: oauth2-proxy
3. Create Route in OpenShift: Create an OpenShift route to expose the OAuth2 Proxy:
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yaml
   apiVersion: <http://route.openshift.io/v1|route.openshift.io/v1>
   kind: Route
   metadata:
     name: oauth2-proxy-route
   spec:
     to:
       kind: Service
       name: oauth2-proxy
     port:
       targetPort: 4180
     tls:
       termination: edge
4. Set Environment Variables for Prefect: Ensure the Prefect deployment is aware of the proxy:
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yaml
   apiVersion: apps/v1
   kind: Deployment
   metadata:
     name: prefect-server
     labels:
       app: prefect-server
   spec:
     replicas: 1
     selector:
       matchLabels:
         app: prefect-server
     template:
       metadata:
         labels:
           app: prefect-server
       spec:
         containers:
         - name: prefect-server
           image: prefecthq/prefect:latest
           ports:
           - containerPort: 4200
           env:
           - name: HTTPS_PROXY
             value: "<http://oauth2-proxy:4180>"
           - name: HTTP_PROXY
             value: "<http://oauth2-proxy:4180>"
           - name: PREFECT_API_URL
             value: "<http://prefect-server:4200/api>"
5. Inspect Logs and Connectivity: - Check OAuth2 Proxy Logs:
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     oc logs deployment/oauth2-proxy
- Check Prefect Server Logs:
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     oc logs deployment/prefect-server
- Validate Route: Ensure the OpenShift route is correctly configured and accessible:
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     curl -I http://<your-openshift-route>/oauth2/auth
### Conclusion: Perform the above steps and verify each component is correctly configured and accessible. These adjustments should ensure your Prefect deployment works correctly behind an OAuth2 proxy on OpenShift. If you encounter further errors, please inspect and provide logs from both the Prefect server and the OAuth2 proxy for more targeted troubleshooting.
d
@Marvin The Openshift route is https and not http, does it change the configuration?
m
Yes, if the OpenShift route is configured with HTTPS, you'll need to ensure a few additional details: 1. Ensure the OAuth2 Proxy forwards requests to the HTTPS Prefect server. 2. Update environment variables to respect HTTPS. Here's an updated configuration to accommodate HTTPS: ### Steps to Update Configuration: 1. Prefect Server Deployment on OpenShift: Even when you use HTTPS on the route, Prefect server internally can still run on HTTP.
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yaml
   apiVersion: apps/v1
   kind: Deployment
   metadata:
     name: prefect-server
   spec:
     replicas: 1
     selector:
       matchLabels:
         app: prefect-server
     template:
       metadata:
         labels:
           app: prefect-server
       spec:
         containers:
         - name: prefect-server
           image: prefecthq/prefect:latest
           ports:
           - containerPort: 4200
           env:
           - name: PREFECT_API_URL
             value: "<http://prefect-server:4200/api>"
   ---
   apiVersion: v1
   kind: Service
   metadata:
     name: prefect-server
   spec:
     ports:
     - port: 4200
       targetPort: 4200
     selector:
       app: prefect-server
2. OAuth2 Proxy Configuration Including HTTPS: Configure OAuth2 Proxy to handle HTTPS redirection:
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yaml
   apiVersion: v1
   kind: ConfigMap
   metadata:
     name: oauth2-proxy-config
   data:
     oauth2-proxy.cfg: |
       provider = "google"
       client_id = "<YOUR_CLIENT_ID>"
       client_secret = "<YOUR_CLIENT_SECRET>"
       cookie_secret = "<A_SECRET>"
       upstreams = [
         "<http://prefect-server:4200>"
       ]
       redirect_url = "https://<your-domain>/oauth2/callback"
       http_address = "0.0.0.0:4180"
       email_domains = [
         "*"
       ]
   ---
   apiVersion: apps/v1
   kind: Deployment
   metadata:
     name: oauth2-proxy
   spec:
     replicas: 1
     selector:
       matchLabels:
         app: oauth2-proxy
     template:
       metadata:
         labels:
           app: oauth2-proxy
       spec:
         containers:
         - name: oauth2-proxy
           image: <http://quay.io/oauth2-proxy/oauth2-proxy:latest|quay.io/oauth2-proxy/oauth2-proxy:latest>
           volumeMounts:
           - name: config
             mountPath: /etc/oauth2_proxy.cfg
             subPath: oauth2-proxy.cfg
           args:
           - --config=/etc/oauth2_proxy.cfg
           ports:
           - containerPort: 4180
           env:
           - name: OAUTH2_PROXY_PROVIDER
             valueFrom:
               configMapKeyRef:
                 name: oauth2-proxy-config
                 key: provider
   ---
   apiVersion: v1
   kind: Service
   metadata:
     name: oauth2-proxy
   spec:
     ports:
     - port: 4180
       targetPort: 4180
     selector:
       app: oauth2-proxy
3. OpenShift Route with HTTPS: Create an HTTPS route for OAuth2 Proxy:
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yaml
   apiVersion: <http://route.openshift.io/v1|route.openshift.io/v1>
   kind: Route
   metadata:
     name: oauth2-proxy-route
   spec:
     to:
       kind: Service
       name: oauth2-proxy
     port:
       targetPort: 4180
     tls:
       termination: edge
4. Set Environment Variables Considering HTTPS: Ensure Prefect respects the proxy settings, especially for HTTPS: ```yaml apiVersion: apps/v1 kind: Deployment metadata: name: prefect-server labels: app: prefect-server spec: replicas: 1 selector: matchLabels: app: prefect-server template: metadata: labels: app: prefect-server spec: containers: - name: prefect-server image: prefecthq/prefect:latest ports: - containerPort: 4200 env: - name: HTTPS_PROXY value: "http://oauth2-proxy:4180" - name: HTTP_PROXY value: "http://oauth2-proxy:4180" - name: prefect-server image: prefecthq/prefect:latest ports: - containerPort: 4200
env: - name: PREFECT_API_URL value: "https://<your-openshift-route>/api"
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### Verify Configuration:

1. **Test OAuth2 Proxy Accessibility**:
   Ensure OAuth2 Proxy is reachable and properly handles HTTPS:

   ```sh
   curl -I https://<your-openshift-route>/oauth2/auth
2. Validate Prefect Server via Proxy: Ensure the Prefect server is accessible through the OAuth2 Proxy and OpenShift route:
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   curl -I https://<your-openshift-route>/api
### Further Steps: 1. Inspect Logs: - OAuth2 Proxy Logs:
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     oc logs deployment/oauth2-proxy
- Prefect Server Logs:
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     oc logs deployment/prefect-server
2. Check OpenShift Route: - Verify that the route correctly targets the OAuth2 Proxy service and that the TLS termination (edge) is correctly configured. Properly aligning the configuration to account for HTTPS should ensure your setup works smoothly without encountering a 503 error. If you continue to face issues, reviewing logs and configurations at each step is crucial for further debugging.