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pageserver: only write out legacy tenant config if no generation (#6891)

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## Problem

Previously we always wrote out both legacy and modern tenant config
files. The legacy write enabled rollbacks, but we are long past the
point where that is needed.

We still need the legacy format for situations where someone is running
tenants without generations (that will be yanked as well eventually),
but we can avoid writing it out at all if we do have a generation number
set. We implicitly also avoid writing the legacy config if our mode is
Secondary (secondary mode is newer than generations).

## Summary of changes

- Make writing legacy tenant config conditional on there being no
generation number set.
This commit is contained in:
John Spray
2024-02-26 10:24:58 +00:00
committed by Christian Schwarz
parent 936a00e077
commit 6f7f8958db
3 changed files with 18 additions and 14 deletions
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2
test_runner/fixtures/neon_fixtures.py
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@@ -3812,7 +3812,7 @@ def pytest_addoption(parser: Parser):
SMALL_DB_FILE_NAME_REGEX: re.Pattern = re.compile( # type: ignore[type-arg]
r"config|config-v1|heatmap-v1|metadata|.+\.(?:toml|pid|json|sql|conf)"
r"config-v1|heatmap-v1|metadata|.+\.(?:toml|pid|json|sql|conf)"
)