vi cleandocker.sh

#!/bin/sh
echo "==================== start clean docker containers logs =========================="
logs=$(find /var/lib/docker/containers/ -name *-json.log)
for log in $logs
    do
   echo "clean logs : $log"
        cat /dev/null > $log
    done
echo "==================== end clean docker containers logs  =========================="

chmod 755 cleandocker.sh

./cleandocker.sh