[anfimovdm]

Resolves AlmaLinux/build-system#563

Summary

The AlmaLinux 10 linux/amd64 image is built for x86-64-v3. On workers whose CPU doesn't support it, every binary in the container exits with 127: the environment stops right after start_environment and initial_provision fails with Failed to create temporary directory. This adds a way to send AlmaLinux 10 x86_64 tasks only to x86-64-v3 capable workers.

Changes

• alts/shared/constants.py: new queue architecture x86_64_v3 in ARCHITECTURES, so workers declare docker-x86_64_v3-* and opennebula-x86_64_v3-* queues.
• alts/shared/models.py:
  • New QueueArchOverride model: dist_name, dist_versions, arch (queue architecture the task would normally go to), queue_arch.
  • arch and queue_arch must be declared queue architectures, so a typo fails at startup instead of leaving tasks in a queue nobody consumes.
  • SchedulerConfig.queue_arch_overrides, empty by default.
• alts/scheduler/scheduling.py: queue architecture lookup moved to TestsScheduler.get_queue_arch(), which applies the first matching override. Versions match on the full version or its major part, like docker_image_overrides.

Nothing changes without an override in the config. Workers are unaffected: the task still has dist_arch: x86_64, so containers keep using linux/amd64.

Example scheduler config:

queue_arch_overrides:
  - dist_name: almalinux
    dist_versions: ['10']
    arch: x86_64
    queue_arch: x86_64_v3

Rollout

1. Deploy to the workers and add docker-x86_64_v3-0 to the queues of x86-64-v3 capable ones only.
2. Check the new queue has a consumer.
3. Enable the override on the scheduler.

Deployment changes: AlmaLinux/albs-deploy PR (linked in the issue).

Testing

• New tests/scheduler/test_scheduling.py: major, full and integer versions, i686 mapping to x86_64, x86_64_v2/aarch64/other version/other distro not overridden, no overrides, unknown architecture, rejected undeclared queue_arch.
• pytest tests/scheduler tests/runners: 27 passed.
• Full suite locally: everything outside tests/executors passes. The tests/executors failures need SSH to localhost and bats, which the alts_tests container provides; they're unrelated to this change.