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Introduce structured logging and JSON format:
Most important logs are migrated to structured methods.
Flag for selecting logging format is implemented
JSON format is implemented
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Adding guarding against regression and update user guideline:
Static analysis protects important log lines from reverting to string formating
Kubernetes Logging convention document is updated
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@dims / @ehashmanå®äºhttps://github.com/kubernetes/klog/pull/184
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Verbosity-levels on info logs. This gives developers a chance to indicate arbitrary grades of importance for info logs, without assigning names with semantic meaning such as "warning", "trace", and "debug". Superficially this may feel very similar, but the primary difference is the lack of semantics. Because verbosity is a numerical value, it's safe to assume that an app running with higher verbosity means more (and less important) logs will be generated.
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