Warn about refreshing grains after upgrading master to 3008.x - #88
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Salt 3008.0 restructured the master's minion data cache, splitting grains into a dedicated cache bank instead of a combined per-minion blob. Cached data from a pre-3008 master isn't migrated, so grain targeting (-G), mine.get, and cached pillar/grains lookups can return stale or empty results until minions re-sync. Add a warning to the general upgrade procedure telling admins to run saltutil.refresh_grains on minions after upgrading a 3006.x/3007.x master to 3008.x.
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What does this PR do?
Salt 3008.0 restructured the master's minion data cache, splitting grains into a dedicated cache bank instead of a combined per-minion blob. Cached data from a pre-3008 master isn't migrated, so grain targeting (-G), mine.get, and cached pillar/grains lookups can return stale or empty results until minions re-sync.
Add a warning to the general upgrade procedure telling admins to run saltutil.refresh_grains on minions after upgrading a 3006.x/3007.x master to 3008.x.
(Fixes will close the ticket after merging. Relate will leave the ticket open
after merging.)
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