Implement Webhook Endpoint for Git Repository Tag Addition Notifications

[raw-leak]

Description:
The Configleam project requires the implementation of a webhook endpoint to receive notifications when new tags are added to Git repositories. This webhook will serve as a signal for Configleam to initiate the verification of repository tags, supplementing the existing periodic verification mechanism. It is crucial to ensure that this functionality operates exclusively on the leader node in a high availability setup, with other nodes serving as read replicas.

Objective:
The main objective of this initiative is to enhance the efficiency and responsiveness of tag verification in Configleam by integrating a webhook-based notification system. The webhook endpoint will trigger the verification process upon receiving notifications of tag additions, ensuring timely updates to repository information.

Tasks:

1. Webhook Endpoint Implementation:

   • Develop a webhook endpoint within the Configleam application to receive notifications from Git repository hosting services.
   • Configure the webhook endpoint to listen for events related to tag additions.

2. Leader Node Execution:

   • Implement logic to ensure that the tag verification process is executed only on the leader node in a high availability setup.
   • Utilize leader election mechanisms to determine the leader node responsible for handling the verification task.

3. Tag Verification Trigger:

   • Integrate the webhook handling logic with the existing tag verification functionality.
   • Implement a synchronization mechanism to ensure that if one verification process is already in progress, subsequent triggers, whether from the webhook or automatic intervals, are queued and executed sequentially.
   • Utilize concurrency control techniques such as locks or channels to coordinate and prioritize verification tasks, ensuring orderly execution without contention or race conditions.

4. High Availability Considerations:

   • Ensure that the webhook endpoint is accessible only on the leader node to prevent duplicate verifications.
   • Implement error handling mechanisms to address scenarios where multiple nodes attempt to handle webhook notifications.

5. Testing and Validation:

   • Conduct thorough testing to verify the functionality and reliability of the webhook endpoint under various conditions.
   • Test scenarios involving tag addition notifications and leader node failover to validate the robustness of the implementation.

6. Documentation Updates:

   • Update project documentation to include information about the new webhook endpoint and its role in the tag verification process.
   • Provide instructions for configuring and managing the webhook endpoint in a high availability environment.

Rationale:
Integrating a webhook-based notification system for tag verification offers several advantages:

• Real-Time Updates: Immediate verification of tag additions ensures up-to-date repository information.
• Efficiency: Eliminates the need for frequent polling intervals, reducing resource consumption.
• High Availability Compatibility: Ensures that the verification process operates seamlessly in a high availability setup, with proper leader node coordination.

Outcome:
Successful implementation of the webhook endpoint will enable Configleam to respond promptly to tag addition events, ensuring accurate and timely verification of repository tags. This enhancement will improve the overall efficiency, responsiveness, and reliability of the tag verification process, contributing to a better user experience for Configleam users.