月度归档:2018年04月

$.getScript原生实现

var script = document.createElement(‘script’);
script.type = ‘text/javascript’;
script.src = ‘/xxx.js’; //填自己的js路径
document.body.appendChild(script);// 缺点:不能跨域load

# 方法2

(function(){
var i = document.createElement(‘iframe’);
i.style.display = ‘none’;
// i.onload = function() {i.parentNode.removeChild(i);};
// i.name=”;
i.src = ‘http://xxx/xx’;
document.body.appendChild(i);
// i.contentWindow.document.body.innerHTML = ”;
})();

upstream timed out (110: Connection timed out) while reading upstream

2018/04/26 23:34:39 [error] 10872#0: *268906 upstream timed out (110: Connection timed out) while reading upstream, client: 119.103.223.107, server: ****, request: “GET /**** HTTP/1.1”, upstream: “****”, host: “****”

#fastcgi_connect_timeout 600;
#fastcgi_read_timeout 600;
#fastcgi_send_timeout 600;
proxy_connect_timeout 600;
proxy_read_timeout 600;
proxy_send_timeout 600;

upstream timed out (110: Connection timed out) while reading upstream,

upstream timed out (110: Connection timed out) while reading response header from upstream

(24: Too many open files)

2018/04/26 23:32:58 [crit] 1457#0: *259351 open() “/usr/share/nginx/html/50x.html” failed (24: Too many open files), client: 112.17.247.117, server: ***, request: “GET /*** HTTP/1.1”, upstream: “***”, host: “***”

worker_rlimit_nofile 65535;

while read line无法读取最后一行的问题

while read line读取文件时,如果文件最后一行之后没有换行符\n,则read读取最后一行时遇到文件结束符EOF,循环终止,虽然此时$line内存有最后一行,但程序已经没有机会再处理此行,因此可以通过以下代码来解决此问题:

while read line || [[ -n ${line} ]]; do

done
这样当文件没有结束时不会测试-n $line,当遇到文件结束时,仍然可以通过测试$line是否有内容来进行继续处理。

http://ju.outofmemory.cn/entry/86710

MySQL自动备份到亚马逊S3


#!/bin/sh

# Updates etc at: https://github.com/woxxy/MySQL-backup-to-Amazon-S3
# Under a MIT license

# change these variables to what you need
MYSQLROOT=XXX
MYSQLPASS=XXXX
S3BUCKET=xx-mysql-backup
# DATABASE='--all-databases'
DATABASE=${1-default}
FILENAME=${DATABASE}
HOST=master
DUMPOPTION='--quick --single-transaction'
# the following line prefixes the backups with the defined directory. it must be blank or end with a /
S3PATH=mysql-backup/${DATABASE}
# when running via cron, the PATHs MIGHT be different. If you have a custom/manual MYSQL install, you should set this manually like MYSQLDUMPPATH=/usr/local/mysql/bin/
MYSQLDUMPPATH=
#tmp path.
TMP_PATH=/tmp/

DATESTAMP=$(date +".%Y-%m-%d.%H:%M:%S")
DELDATESTAMP=$(date -d"15 day ago 2017-04-16" +".%Y-%m-%d.%H:%M:%S")
DAY=$(date +"%d")
DAYOFWEEK=$(date +"%A")

PERIOD=${2-day}
if [ ${PERIOD} = "auto" ]; then
if [ ${DAY} = "01" ]; then
PERIOD=month
elif [ ${DAYOFWEEK} = "Sunday" ]; then
PERIOD=week
else
PERIOD=day
fi
fi

echo "Selected period: $PERIOD."

echo "Starting backing up the database to a .gz file..."

# dump all databases
${MYSQLDUMPPATH}mysqldump -h${HOST} ${DUMPOPTION} --user=${MYSQLROOT} --password=${MYSQLPASS} ${DATABASE} | gzip > ${TMP_PATH}${FILENAME}.gz

echo "Done backing up the database to a file."
# echo "Starting compression..."

# tar czf ${TMP_PATH}${FILENAME}${DATESTAMP}.tar.gz ${TMP_PATH}${FILENAME}.sql
mv ${TMP_PATH}${FILENAME}.gz ${TMP_PATH}${FILENAME}${DATESTAMP}.gz

# echo "Done compressing the backup file."

# upload all databases
echo "Uploading the new backup..."
s3cmd put -f --check-md5 -s --continue-put ${TMP_PATH}${FILENAME}${DATESTAMP}.gz s3://${S3BUCKET}/${S3PATH}${PERIOD}/
echo "New backup uploaded."
if [ $? -ne 0 ]
then
echo "Re uploading the backup file..."
s3cmd put -f --check-md5 -s --continue-put ${TMP_PATH}${FILENAME}${DATESTAMP}.gz s3://${S3BUCKET}/${S3PATH}${PERIOD}/
echo "Re upload backup file done."
fi

echo "Moving the backup from past $PERIOD to another folder..."
s3cmd mv --recursive s3://${S3BUCKET}/${S3PATH}${PERIOD}/${FILENAME}${DELDATESTAMP} s3://${S3BUCKET}/${S3PATH}previous_${PERIOD}/
echo "Past backup moved."

# we want at least two backups, two months, two weeks, and two days
echo "Removing old backup (15 ${PERIOD}s ago)..."
s3cmd del --recursive s3://${S3BUCKET}/${S3PATH}previous_${PERIOD}/
echo "Old backup removed."

# remove databases dump
# rm ${TMP_PATH}${FILENAME}.sql
echo "Removing the gz files..."
rm ${TMP_PATH}${FILENAME}${DATESTAMP}.gz
echo "Files removed."
echo "All done."

Mariadb 修改数据目录,并且打开了SELinux,SELinux配置命令

Job for mariadb.service failed because the control process exited with error code. See “systemctl status mariadb.service” and “journalctl -xe” for details.


180414 06:08:19 mysqld_safe Starting mysqld daemon with databases from /mnt/mysql
180414 6:08:19 [Note] /usr/libexec/mysqld (mysqld 5.5.56-MariaDB) starting as process 14143 …
180414 6:08:19 [Warning] Can’t create test file /mnt/mysql/ip-172-31-17-176.lower-test
180414 6:08:19 InnoDB: The InnoDB memory heap is disabled
180414 6:08:19 InnoDB: Mutexes and rw_locks use GCC atomic builtins
180414 6:08:19 InnoDB: Compressed tables use zlib 1.2.7
180414 6:08:19 InnoDB: Using Linux native AIO
180414 6:08:19 InnoDB: Initializing buffer pool, size = 128.0M
180414 6:08:19 InnoDB: Completed initialization of buffer pool
180414 6:08:19 InnoDB: Operating system error number 13 in a file operation.
InnoDB: The error means mysqld does not have the access rights to
InnoDB: the directory.
InnoDB: File name ./ibdata1
InnoDB: File operation call: ‘create’.
InnoDB: Cannot continue operation.
180414 06:08:19 mysqld_safe mysqld from pid file /var/run/mariadb/mariadb.pid ended

chcon -R -t mysqld_db_t /mnt/mysql

参考页面:https://www.thegeekstuff.com/2016/05/move-mysql-directory/