[Auditbeat] Cherry-pick #9732 to 6.6: User metricset: Fetch groups by user #9872
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Cherry-pick of PR #9732 to 6.6 branch. Original message:
Currently, the
user
metricset reads all users, then reads all groups and their members and matches one to the other. This can be a problem when groups have a lot of members (see #9679).This changes to looking up groups of individual users.
It also changes the types of the
system.audit.user.uid
andsystem.audit.user.gid
fields frominteger
tokeyword
to accommodate Windows in the future (Go'sUser
andGroup
structs usestrings
, so does ECSuser.id
/group.id
).Because the internal structure of the
User
struct changes, this invalidates previousbeat.db
files. I have not added any conversion logic this time since this metricset is not released yet - but we will have to do it in the future.Fixes #9679.