json-log-viewer

The json-log-viewer converts JSON logs to a human-readable format via stdin and offers a Scala.js browser version, streamlining log analysis for developers and system administrators.

DEMO

install

coursier install json-log-viewer --channel https://git.io/JvV0g

build jvm version

sbt stage

run jvm version

cat log.txt | ./json-log-viewer/jvm/target/universal/stage/bin/json-log-viewer

build js version

sbt fullLinkJS

run js version

cat log.txt | node ./json-log-viewer/js/target/scala-3.3.1/json-log-viewer-opt/main.js

frontend-laminar

~fastLinkJS::webpack

k9s plugin

Integrate json-log-viewer with k9s to view formatted JSON logs directly within the k9s interface.

Prerequisites

For the plugin to work correctly, the following must be installed on your system:

1. coursier - Used to download and run json-log-viewer if it's not installed.
2. json-log-viewer (optional) - If already installed, the plugin will use it directly; otherwise, it will fall back to using coursier to launch it.

Installation

Add the following to your k9s plugin file (usually located at ~/.k9s/plugins.yaml or, on macOS, check the plugin path with k9s info):

plugins:
  json-log-viewer:
    shortCut: Ctrl-L
    description: "json-log-viewer"
    scopes:
      - pod
      - containers
    command: sh
    background: false
    args:
      - -c
      - |
        if command -v json-log-viewer >/dev/null 2>&1; then
          VIEWER_COMMAND="json-log-viewer"
        else
          VIEWER_COMMAND="coursier launch ru.d10xa:json-log-viewer_3:latest.release"
        fi

        if [ -n "$POD" ]; then
          kubectl logs $POD -n $NAMESPACE --context $CONTEXT -c $NAME -f --tail 500 | $VIEWER_COMMAND; read -p "Press [Enter] to close..."
        else
          kubectl logs $NAME -n $NAMESPACE --context $CONTEXT -f --tail 500 | $VIEWER_COMMAND; read -p "Press [Enter] to close..."
        fi

k9s plugin usage

1. Install json-log-viewer
2. Launch k9s
3. Select a Pod or Container
4. Press Ctrl+L to view logs formatted by json-log-viewer