To create multiple Prefect workers in a Helm chart using Prefect 2.x, it's important to know the existing limitations and possible workarounds. There is currently an issue on GitHub discussing the topic of deploying multiple Prefect workers with different configurations, like using GPU and non-GPU environments within the same Helm chart. The main challenge is that the current chart doesn't support deploying multiple instances natively as sub-charts because the fields are immutable or already claimed by another service account.
Here's a summary of the problem and a potential solution:
1.
Immutable Fields: When attempting to deploy multiple workers (for example, with GPU and without GPU configurations) as sub-charts, you might encounter issues due to immutable fields in Kubernetes (e.g., Deployment specs).
2.
Service Account Conflict: Deploying workers as independent pieces has led to conflicts due to resource ownership and helm annotations.
Possible Workarounds:
- Consider deploying different worker configurations as separate Helm releases. This involves avoiding naming conflicts by customizing ServiceAccount and other Kubernetes resource names.
- Explore splitting your Helm charts such that each worker configuration lives in its own adapted chart, avoiding direct conflicts within a single chart's scope.
You can follow the discussion on potential solutions and further technical specifics in the GitHub issue
here.
If you have additional questions on implementing this or encounter hurdles, feel free to reach out!