backup nginx logs

nginx_log.sh

#!/bin/bash
log_dir=/var/log/nginx/
backup_log_dir=/home/backup/nginx_logs/$(date +"%Y%m")/
log_date=$(date +"%Y%m%d")
nginx_pid=/var/run/nginx.pid
keep_days=30

echo "processing ${log_dir}"

#create backup dir
mkdir -p $backup_log_dir

#remove old logs
find "$log_dir" -name "*\.log.gz" -type f -mtime +"${keep_days}" -exec rm -rf {} \;

#backup logs
for log_name in `ls "$log_dir" | awk '/.log$/'`;do
    echo "${log_name}"
    if [ -e "${backup_log_dir}${log_date}-${log_name}" ];then
        echo "${backup_log_dir}${log_date}-${log_name} Already exists" && continue
    else
        /bin/mv "${log_dir}${log_name}" "${backup_log_dir}${log_date}-${log_name}"
        #/bin/gzip "${backup_log_dir}${log_date}-${log_name}"
    fi
done

#tell nginx create new log file
/bin/kill -USR1 $(cat $nginx_pid) && /bin/sleep 1