Logging and Observability

Log Level

Choose Detail

A logging helper can select how much detail to write while keeping the output format stable for readers and tools.

Program

Play the script to choose the log level and see the resulting log line.

log_level_line.sh 
#!/usr/bin/env bash

level=
case "$level" in
    info) message="service ready" ;;
    debug) message="cache warmed" ;;
esac
line="$level:$message"
echo "$line"

#!/usr/bin/env bash

level=
case "$level" in
    info) message="service ready" ;;
    debug) message="cache warmed" ;;
esac
line="$level:$message"
echo "$line"
log level The log level names how detailed the message is.
stable format A stable log shape is easier to search and parse.
message The message carries the human-readable event detail.