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io.Writer implementation using logrus

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Many golang libraries use the golang's log package to print their logs. This means that if your application uses logrus to print structured logging, those packages will print a format that is (probably) incompatible with yours, and you may end losing logs in your logs collector because they can't be parsed properly.


Print the logs written using log.Printf through logrus, by setting log.SetOutput to an io.Writer implementation that uses logrus as output, i.e.:


See example_*_test.go files to find testable examples that serve as documentation.

Simple solution

Or... you can simply use the standard APIs that logrus provides, i.e., this does the same as this package:

    log.SetOutput(logrus.WithFields(logrus.Fields{"logger": "stdlib"}).WriterLevel(logrus.InfoLevel))

So, unless you want this to be configurable using an envconfig-filled struct, there's no reason to use this library.