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shell自動下載nginx日誌檔案到本地

最近遇到一個情況就是伺服器不響應了,nginx也不寫日誌,經查發現是日誌檔案太大多,磁碟滿了,以前都是用指令碼自動上傳到OSS的,現在需要將log下載到本地,於是用shell寫了一段指令碼,然後放到crontab裡面,每天凌晨把log下載下來

shell 指令碼

#!/bin/bash

HOST="115.114.113.112"
LOG_PATH="/usr/local/nginx/logs/"
LOCAL_LOG_PATH="/home/admin/logs/$HOST/"

# 把所有帶日期的日誌檔案,同步本地,然後刪除遠端檔案
# 日誌檔案命名: access_2016-12-28.log
LOGS=$(ssh 
[email protected]
$HOST ls $LOG_PATH | grep _) LOGS=${LOGS// / } function log() { echo `date "+%Y-%m-%d %H:%M:%S"` $1 } for log in $LOGS do REMOTE_LOG_FILE="$LOG_PATH$log" LOCAL_LOG_FILE="$LOCAL_LOG_PATH$log" log "Ready to download from $HOST >> $REMOTE_LOG_FILE" log "Check local $LOCAL_LOG_FILE
exists"
DOWNLOAD=1 if [ -f $LOCAL_LOG_FILE ]; then log "Local file already exists, and check the md5 value of the file" REMOTE_FILE_MD5=$(ssh [email protected]$HOST md5sum $REMOTE_LOG_FILE | awk '{print $1}') LOCAL_FILE_MD5=$(md5sum $LOCAL_LOG_FILE | awk '{print $1}'
) # log "$REMOTE_FILE_MD5 == $LOCAL_FILE_MD5" if [ "$REMOTE_FILE_MD5"x = "$LOCAL_FILE_MD5"x ]; then DOWNLOAD=0 log "The file content is the same, skip the current file" else log "The file content is different, to download the file" fi fi if [ $DOWNLOAD = 1 ]; then log "Download $REMOTE_LOG_FILE from $HOST" scp [email protected]$HOST:$REMOTE_LOG_FILE $LOCAL_LOG_PATH fi log "Delete $REMOTE_LOG_FILE from $HOST" ssh [email protected]$HOST rm $REMOTE_LOG_FILE done

給指令碼執行許可權

$ chmod +x sync_115.114.113.112.sh

加到crontab,每天凌晨一分執行,因為伺服器上面0分會生成日誌檔案,所以這裡等一分鐘再下載,基本就沒有問題

1 0 * * * /home/admin/logs/sync_115.114.113.112.sh

這裡需要注意的是,需要提前把ssh公鑰上傳到伺服器,好免密碼登入,執行命令