Add capability for gradual rollout of transition mode#5
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Log domain, storage_mode, and rollout_bucket at each storage mode decision point to help observe the gradual rollout behavior.
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ErikBooijFR
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Jan 8, 2026
Replace brute-force test approach with targeted test cases that verify behavior at rollout boundaries (0%, 1%, 50%, 99%, 100%). Remove helper functions and large domain list that were only used for test generation.
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This PR introduces a way to gradually roll out the new certificate storage format. Instead of switching every domain to the new system at once, we can now move them over in small groups to ensure everything is working correctly.
Percentage-Based Rollout
CERTMAGIC_STORAGE_MODE_ROLLOUT_PERCENTallows us to control the amount of domains which enter "transition" mode.10, only 10% of all domains fall into the "rollout buckets" and enter transition mode.Why this is helpful
Notes
Proof of work
ROLLOUT_PERCENT = 40
ROLLOUT_PERCENT = 0
ROLLOUT_PERCENT = 100