json-log-to-human-readable

Convert JSON log messages to a human-readable format.

The following formats are supported:

• Quarkus JSON Logging
• Spring Boot JSON Logging
• Uber Zap
• .NET Core

Flags:
  -d, --dotnet       .NET JSON input
  -h, --help         help for json-log-to-human-readable
  -s, --springboot   Spring Boot JSON input
  -v, --version      version for json-log-to-human-readable
  -z, --zap          Uber zap JSON Input

Usage Examples:

test.json

{ "level": "INFO", "timestamp": "2020-07-14T09:38:14.977Z", "message": "sample output", "loggerName": "org.acme.MyClass" }

cat test.json | json-log-to-human-readable

Output

INFO 2020-07-14T09:38:14.977Z    org.acme.MyClass       sample output

This also works for Pods running in Kubernetes:

kubectl logs -f pod1 | json-log-to-human-readable

Spring Boot JSON Logging format could be transformed with -s

test-spring-boot.json

{"@timestamp":"2020-07-15T19:09:39.983Z","@version":"1","message":"My log message","logger_name":"org.acme.MyClass","thread_name":"pool-1-thread-1","level":"INFO","level_value":20000}

cat test-spring-boot.json |  json-log-to-human-readable -s

Output

INFO 2020-07-15T19:09:39.983Z    org.acme.MyClass       My log message

Uber Zap JSON Logging format could be transformed with -z

test-uber-zap.json

{"level":"error","ts":1598445905.143377,"logger":"controller-runtime.controller","msg":"Reconciler error","controller":"scaledobject-controller","request":"default/azure-servicebus-queue-scaledobject","error":"error getting scaler for trigger #0: error parsing azure service bus metadata: no connection setting given","stacktrace":"github.com/go-logr/zapr.(*zapLogger).Error\n\t/Users/zroubali/go/pkg/mod/github.com/go-logr/zapr@v0.1.1/zapr.go:128\nsigs.k8s.io/controller-runtime/pkg/internal/controller.(*Controller).reconcileHandler\n\t/Users/zroubali/go/pkg/mod/sigs.k8s.io/controller-runtime@v0.2.2/pkg/internal/controller/controller.go:218\nsigs.k8s.io/controller-runtime/pkg/internal/controller.(*Controller).processNextWorkItem\n\t/Users/zroubali/go/pkg/mod/sigs.k8s.io/controller-runtime@v0.2.2/pkg/internal/controller/controller.go:192\nsigs.k8s.io/controller-runtime/pkg/internal/controller.(*Controller).worker\n\t/Users/zroubali/go/pkg/mod/sigs.k8s.io/controller-runtime@v0.2.2/pkg/internal/controller/controller.go:171\nk8s.io/apimachinery/pkg/util/wait.JitterUntil.func1\n\t/Users/zroubali/go/pkg/mod/k8s.io/apimachinery@v0.0.0-20190404173353-6a84e37a896d/pkg/util/wait/wait.go:152\nk8s.io/apimachinery/pkg/util/wait.JitterUntil\n\t/Users/zroubali/go/pkg/mod/k8s.io/apimachinery@v0.0.0-20190404173353-6a84e37a896d/pkg/util/wait/wait.go:153\nk8s.io/apimachinery/pkg/util/wait.Until\n\t/Users/zroubali/go/pkg/mod/k8s.io/apimachinery@v0.0.0-20190404173353-6a84e37a896d/pkg/util/wait/wait.go:88"}

cat test-uber-zap.json |  json-log-to-human-readable -z

Output

error 2020-08-26 14:45:05.143377065 +0200 CEST   controller-runtime.controller  msg: Reconciler error   controller: scaledobject-controller      request: ugsvt-mercedes/azure-servicebus-queue-scaledobject
error: error getting scaler for trigger #0: error parsing azure service bus metadata: no connection setting givenstacktrace: github.com/go-logr/zapr.(*zapLogger).Error
        /Users/zroubali/go/pkg/mod/github.com/go-logr/zapr@v0.1.1/zapr.go:128
sigs.k8s.io/controller-runtime/pkg/internal/controller.(*Controller).reconcileHandler
        /Users/zroubali/go/pkg/mod/sigs.k8s.io/controller-runtime@v0.2.2/pkg/internal/controller/controller.go:218
sigs.k8s.io/controller-runtime/pkg/internal/controller.(*Controller).processNextWorkItem
        /Users/zroubali/go/pkg/mod/sigs.k8s.io/controller-runtime@v0.2.2/pkg/internal/controller/controller.go:192
sigs.k8s.io/controller-runtime/pkg/internal/controller.(*Controller).worker
        /Users/zroubali/go/pkg/mod/sigs.k8s.io/controller-runtime@v0.2.2/pkg/internal/controller/controller.go:171
k8s.io/apimachinery/pkg/util/wait.JitterUntil.func1
        /Users/zroubali/go/pkg/mod/k8s.io/apimachinery@v0.0.0-20190404173353-6a84e37a896d/pkg/util/wait/wait.go:152
k8s.io/apimachinery/pkg/util/wait.JitterUntil
        /Users/zroubali/go/pkg/mod/k8s.io/apimachinery@v0.0.0-20190404173353-6a84e37a896d/pkg/util/wait/wait.go:153
k8s.io/apimachinery/pkg/util/wait.Until
        /Users/zroubali/go/pkg/mod/k8s.io/apimachinery@v0.0.0-20190404173353-6a84e37a896d/pkg/util/wait/wait.go:88

Installation

Homebrew

brew install fhopfensperger/tap/json-log-to-human-readable

Script

curl https://raw.githubusercontent.com/fhopfensperger/json-log-to-human-readable/master/get.sh | bash

Manually

Go to Releases download the latest release according to your processor architecture and operating system, then unarchive and copy it to the right location

tar xvfz json-log-to-human-readable_x.x.x_darwin_amd64.tar.gz
cd json-log-to-human-readable_x.x.x_darwin_amd64
chmod +x json-log-to-human-readable
sudo mv json-log-to-human-readable /usr/local/bin/

Run as container

Besides installing the binary on the local computer, you have the option to run the program as a container

kubectl logs -f pod1 | docker run -i ghcr.io/fhopfensperger/json-log-to-human-readable