Cherry-pick #10946 to 6.7: Ensure kubernetes caches don't expire if they are being read #11058
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…#10946) Some metrics in metricbeat kubernetes module are cached during a time, if they are not updated they are removed. But it is usual to have pods or containers that are not updated during more time that the expiration cache. Current implementation was not renovating expiration times for cache entries so all were eventually removed if updates for them are not received. Replace it with the cache implementation available in libbeat, but keeping the existing interface. Also, use slashes instead of dashes to generate unique container uids. Dashes can be used by kubernetes names, what could lead to ambiguous keys for the caches. Fix elastic#10658 (cherry picked from commit 106df3d)
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sayden
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Cherry-pick of PR #10946 to 6.7 branch. Original message:
Some metrics in metricbeat kubernetes module are cached during a time,
if they are not updated they are removed. But it is usual to have pods or
containers that are not updated during more time that the expiration cache.
Current implementation was not renovating expiration times for cache
entries so all were eventually removed if updates for them are not received.
Replace it with the cache implementation available in libbeat, but keeping
the existing interface.
Also, use slashes instead of dashes to generate unique container uids.
Dashes can be used by kubernetes names, what could lead to ambiguous
keys for the caches.
Fix #10658