how to view aws log real time (like tail -f)

Question

I can view the log using the following command.

aws logs get-log-events --log-group-name groupName --log-stream-name streamName --limit 100

wha

Answer 1

This is not currently a feature of the CLI since it just exposes the HTTP API for CloudWatch Logs. You could fairly trivially emulate the functionality with a shell script:

#! /bin/sh

end_time=$(($(date +"%s") * 1000))
aws logs get-log-events --log-group-name groupName --log-stream-name streamName --end-time $end_time

while :
do
    start_time=$end_time
    end_time=$(($(date +"%s") * 1000))
    aws logs get-log-events --log-group-name groupName --log-stream-name streamName --start-time $start_time --end-time $end_time
    sleep 1
done

Disclaimer: this won't work on Windows, and there may be a better way to get the time in milliseconds.