Preheat API consistently returns HTTP 500 for Dragonfly endpoint validation

[shuwei819-blip]

Description:
Harbor's preheat API fails consistently when creating preheat instances or P2P policies with Dragonfly endpoints.

Steps to Reproduce:

1. Deploy Harbor v2.13.2 with Dragonfly P2P
2. Try to create preheat instance via API: POST /api/v2.0/p2p/preheat/instances
3. Use Dragonfly endpoint: http://dragonfly-manager:8080
4. Result: HTTP 500 "internal server error"

Expected Behavior:
Preheat instance should be created successfully.

Actual Behavior:
API consistently returns HTTP 500 errors.

Environment:

• Harbor Version: v2.13.2
• Dragonfly Version: Latest
• Kubernetes: v1.32
• Deployment: Helm chart v1.17.2

Additional Notes:

• UI works fine (manual creation succeeds)
• API fails for both instance creation and policy creation
• Issue persists across Harbor versions v2.10.0 → v2.13.2
• Fake endpoints work, real Dragonfly endpoints fail

[wy65701436]

@chlins is the maintaining the Drgaonfly integration, please help to have a look

[chlins]

Could you please provide your dragonfly version and harbor-core logs?

[shuwei819-blip]

@chlins

Environment:

• Harbor Version: v2.13.2-436918f8
• Dragonfly Version: dragonflyoss/manager:latest
• Kubernetes: v1.32
• Deployment: Helm chart v1.17.2

Current Status:

• Harbor is now healthy and running
• Working: /api/v2.0/p2p/preheat/instances
• Working: /api/v2.0/projects/{project}/preheat/policies (GET)
• Broken: /api/v2.0/projects/{project}/preheat/policies (POST) - returns 500
• Not Found: /api/v2.0/preheat/instances (old endpoint)
• UI works fine for manual creation

Logs:
shuwei@Mac harbor % curl -s -X GET "https:///api/v2.0/projects/infra/preheat/policies" -H "Authorization: Basicurl -s -X GET "https:///api/v2.0/projects/infra/preheat/policies" -H "Authorization: Basic $(echo -n "admin:Harbor12345" | base64)" | jq .
[]
<ope": "All Peers"}' -w "\nHTTP Code: %{http_code}\n"
{"errors":[{"code":"UNKNOWN","message":"internal server error"}]}

HTTP Code: 500

Do you maybe have a workaround instead of using the API? How can I create the instance and preheat p2p policy using IaC without doing it manually? So far I've also tried to create that using terraform but it didn't work either. https://d7y.io/docs/next/advanced-guides/open-api/preheat/#harbor