v0.32.7j

JSON aware release of v0.32.7.
Enjoy!

The main idea is to extract 3 fields: datetime, log level, message

Features:

• Configure global expressions to be used in expressions (i.e. coloring by log level, padding, etc.)
• Configure templates (collections of jq expression for time / log-level / message)
• Toggle switch for JSON on/off ("J")
• Iterating through the available templates ("Ctrl+J")
• Editing of templates/their expressions while in Log View ("Shift+J")
  • this even with realtime compiling and instant error messages

Example Templates

... that I can provide (as follows):

• "General" (simply selecting typical fields)
• "Spring" / Logback (typical logback logging of Spring Boot Apps, even inserting arguments into placeholders)
• "Spring + Stacktrace" same as above but with traditional Stacktrace visualization
• "Mongo" Typical fields from Mongo DB logs

Find here the extract from my config.yaml (location indicated by k9s info)

k9s:
  logger:
    tail: 7000
    buffer: 50000
    sinceSeconds: -1
    textWrap: false
    showTime: true
    decodeJson: true
    json:
      globalExpressions: |
        def lpad(n;p): . | tostring | if (n > length) then ((n - length) * (p|tostring)) + . else . end;
        def lpad(n): lpad(n;" "); 
        def rpad(n;p): . | tostring | if (n > length) then . + ((n - length) * (p|tostring)) else . end;
        def rpad(n): rpad(n;" ");
        def dateTimeFromTsNs($ts;$nanos): if $ts then ($ts/1000 | strflocaltime("%FT%T.")) + 
          (if $nanos then $nanos | lpad(9;0) else $ts%1000 | lpad(3;0) end) else "" end + "Z";
        def color($content;$logLvl): ({
          "ERROR": "\u001b[31m", 
          "E": "\u001b[31m", 
          "F": "\u001b[31m", 
          "WARN":"\u001b[33m", 
          "W":"\u001b[33m", 
          "INFO":"",
          "I":"",
          "DEBUG":"\u001b[34m", 
          "D1":"\u001b[34m",
          "TRACE":"\u361b[0m"
        }) as $lvlColor | $lvlColor.[$logLvl] + ($content | tostring) + "\u001b[0m";
        def insertSpringArgs(args): if (args | not) then . else reduce args[] as $arg (.; . |= sub("{}"; $arg)) end;
        def formatThrowable: .className + (if .message and .message != "null" then ": " + .message else "" end) + "\n" + 
        (.stepArray | [ .[]? | "    at " + .className + "." + .methodName + "(" + .fileName + ":" + (.lineNumber|tostring) + ")" ] | join("\n")) + 
        if .commonFramesCount then "\n    ... " + (.commonFramesCount | tostring) + " common frames omitted" else "" end;
        def formatThrowableWithCause: formatThrowable + (if .cause then "\nCaused by: " + (.cause | formatThrowable) else empty end)
      defaultTemplate: Spring
      templates:
        - name: Generic
          loglevel: '.s // .level // ."log.level"'
          datetime: '."@timestamp" // .t."$date" // .timestamp // .timeMillis'
          message: '.message // "\(.msg) \(.attr)"'
        - name: Spring
          loglevel: '.level // ."log.level" | color("[" + . + "]" | lpad(7); .)'
          datetime: '."@timestamp" // dateTimeFromTsNs(.timestamp//.timeMillis; .nanoseconds) // $k8sts'
          message: '. as $j | .message | color(insertSpringArgs($j.arguments); $j.level // $j."log.level")'
        - name: Spring + Stacktraces
          loglevel: '.level // ."log.level" | color("[" + . + "]" | lpad(7); .)'
          datetime: '."@timestamp" // dateTimeFromTsNs(.timestamp//.timeMillis; .nanoseconds)'
          message: '. as $j | .message | color(insertSpringArgs($j.arguments); $j.level // $j."log.level") +
            (if $j.throwable then "\n" + ($j.throwable | formatThrowableWithCause) else "" end)'
        - name: Mongo
          loglevel: '.s | color("[" + . + "]" | lpad(4); .)'
          datetime: '."@timestamp" // .t."$date" // dateTimeFromTsNs(.timestamp//.timeMillis; .nanoseconds)'
          message: '. as $j | "\(.msg) \(.attr)" | color(. ;$j.s // $j.level // $j."log.level")'

Screenshots

Classic log view

JSON decode turned on

Edit/select templates