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+# Simple structured logger for Go
+
+[![Build Status](https://travis-ci.org/felix/logger.svg?branch=master)](https://travis-ci.org/felix/logger)
+
+A simple logger package that provides levels, a number of output formats, and
+named sub-logs.  Output formats include plain text, key/value, JSON and
+AMQP/RabbitMQ
+
+## Installation
+
+Install using `go get github.com/felix/logger`.
+
+Documentation is available at http://godoc.org/github.com/felix/logger
+
+## Usage
+
+### Create a normal logger
+
+```go
+log := logger.New(&logger.Options{
+	Name:  "app",
+	Level: logger.Debug,
+})
+log.Error("unable to do anything")
+```
+
+```text
+... [INFO ] app: unable to do anything
+```
+
+### Create a key/value logger
+
+```go
+import "github.com/felix/logger/outputs/keyvalue"
+
+log := logger.New(&logger.Options{
+	Name:      "app",
+	Level:     logger.Debug,
+    Formatter: keyvalue.New(),
+})
+log.Warn("invalid something", "id", 344, "error", "generally broken")
+```
+
+```text
+... [WARN ] app: invalid something id=344 error="generally broken"
+```
+
+```text
+... [WARN ] app: invalid something id=344 error="generally broken"
+```
+
+### Create a sub-logger
+
+```go
+sublog := log.Named("database")
+sublog.Info("connection initialised")
+```
+
+```text
+... [INFO ] app.database: connection initialised
+```
+
+### Create a new Logger with pre-defined values
+
+For major sub-systems there is no need to repeat values for each log call:
+
+```go
+reqID := "555"
+msgLog := sublog.WithFields("request", reqID)
+msgLog.Error("failed to process message")
+```
+
+```text
+... [INFO ] app.database: failed to process message request=555
+```
+
+## Credits
+
+Solidly based on all the other loggers around, particularly Hashicorp's simple
+hclog with additions and modifications as required.