@Marvin can we run the same work pool on two distinct VPS (to handle potential failure of one VPS) whats the correct architecture to handle failure of a work pool

The Prefect documentation provides information on configuring and managing work pools, but doesn't explicitly mention setting up redundancy or handling potential VPS failures for work pools. Based on common best practices in similar distributed systems and fault tolerant architectures, you might consider the following general principles when setting up a robust architecture that can handle potential failures of a work pool: 1. Redundancy: Deploy multiple instances of the same work pool across different VPS instances to ensure that if one VPS fails, the other instances can continue to process work. 2. Health Checking: Implement health checks to monitor the status of each work pool instance and automatically replace any instances that fail. 3. Load Balancing: Use load balancing to distribute work evenly across the available work pool instances, which can also help in redirecting the traffic if one instance fails. 4. High Availability: Design your system to automatically restart failed work pool instances on a healthy VPS if possible. This may involve using container orchestration tools or infrastructure management services. Here are the links to the Prefect work pool documents for reference: - Work Pools Documentation For more specific instructions and best practices tailored to Prefect, I'd advise looking deeper into their documentation or reaching out to the Prefect community or support for guidance on their recommended high-availability setups for work pools.

@Marvin how would you do step 2 and step 4 ?

To accomplish step 2 and step 4 (implementing health checks and automatic restarting of failed work pool instances), you would typically employ the following practices, although the documentation I have access to does not detail these steps specifically for Prefect. 1. Health Checks: - Define health checks within your deployment framework. This usually involves setting up periodic checks to ensure that the work pool service/process is running as expected. - Monitor the work pool instances using a monitoring service, which can notify you or trigger actions if a health check fails. - You might consider implementing custom scripts or leveraging existing tools like Consul, Nagios, or similar services for health checking. 2. Automatic Restarting: - Utilize a process supervisor like systemd or supervisor to automatically restart the work pool service if it goes down. - If you're using container orchestration platforms like Kubernetes, you can rely on built-in mechanisms like liveness probes and automatic restart policies for your work pool containers. - Ensure that your infrastructure management system has self-healing capabilities which automatically replace or restart failed instances. Cloud services like AWS Auto Scaling, Google Compute Engine's instance groups, or Azure Virtual Machine Scale Sets can help with this. Since the excerpts from the Prefect documentation didn't specifically address these steps, I recommend referring to the full documentation on work pools and also exploring external tools and services that can be integrated with Prefect for health checks and automatic recovery: - Work Pools in Prefect Documentation - Tutorial on Work Pools For detailed solutions and best practices tailored to Prefect, you might also consider seeking advice from the Prefect community or official support. They may provide specific guidance or features that are available in Prefect for implementing these steps.

you'd more likely want to have failover / DR for the worker subscribed to a work pool 2. we already do healthchecks, so you could automate a response to

prefect.worker.stopped

event 4. use self healing infra like

restart: always

or the worker helm chart