humanlog

Read logs from stdin and prints them back to stdout, but prettier.

Using it

With Go installed

$ go install github.com/zbartl/humanlog/...@latest

Example

If you emit logs in JSON or in logfmt, you will enjoy pretty logs when those entries are encountered by humanlog. Unrecognized lines are left unchanged.

$ humanlog < /var/log/logfile.log

Contributing

How to help:

support more log formats: by submitting human.Handler implementations.
live querying: add support for filtering in log output in real time.
charting: some key-values have semantics that could be charted in real time. For instance, durations, frequency of numeric values, etc. See the l2met project.

Usage

NAME:
   humanlog - reads structured logs from stdin, makes them pretty on stdout!

USAGE:
   humanlog [global options] command [command options] [arguments...]

VERSION:
   0.5.0

AUTHOR:
   Antoine Grondin - <antoine@digitalocean.com>

COMMANDS:
   help, h  Shows a list of commands or help for one command

GLOBAL OPTIONS:
   --skip value                      keys to skip when parsing a log entry
   --keep value                      keys to keep when parsing a log entry
   --sort-longest                    sort by longest key after having sorted lexicographically
   --skip-unchanged                  skip keys that have the same value than the previous entry
   --truncate                        truncates values that are longer than --truncate-length
   --truncate-length value           truncate values that are longer than this length (default: 15)
   --light-bg                        use black as the base foreground color (for terminals with light backgrounds)
   --time-format value               output time format, see https://golang.org/pkg/time/ for details (default: "Jan _2 15:04:05")
   --ignore-interrupts, -i           ignore interrupts
   --message-fields value, -m value  Custom JSON fields to search for the log message. (i.e. mssge, data.body.message) (default: "data.message") [$HUMANLOG_MESSAGE_FIELDS]
   --time-fields value, -t value     Custom JSON fields to search for the log time. (i.e. logtime, data.body.datetime) [$HUMANLOG_TIME_FIELDS]
   --level-fields value, -l value    Custom JSON fields to search for the log level. (i.e. somelevel, data.level) [$HUMANLOG_LEVEL_FIELDS]
   --help, -h                        show help
   --version, -v                     print the version