nix-builder-autoscaler/nix/modules/nixos
Abel Luck 02b1a063ab
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support dual launch templates: spot for normal builds, on-demand for nested virtualization
AWS does not allow cpu_options.nested_virtualization with spot instances. Add a second
launch template (on-demand, cpu_options enabled) alongside the existing spot template.
The autoscaler selects the template per-system based on nested_virtualization config.

- RuntimeAdapter.launch_spot -> launch_instance(nested_virtualization=False)
- EC2Runtime: selects spot or on-demand LT; raises misconfiguration error if
  on_demand_launch_template_id is empty when nested_virtualization=True
- AwsConfig: add on_demand_launch_template_id field
- SystemConfig: add nested_virtualization field
- Scheduler: looks up system config to pass nested_virtualization flag
- NixOS module: new aws.onDemandLaunchTemplateIdFile + capacity.nestedVirtualization
  options; assertion prevents enabling nestedVirtualization without the LT ID file
2026-02-28 10:33:26 +01:00
..
services support dual launch templates: spot for normal builds, on-demand for nested virtualization 2026-02-28 10:33:26 +01:00
default.nix add nixos modules 2026-02-27 14:49:05 +01:00