我正在尝试学习一些脚本,但是我找不到一个功能的解决方案。
基本上我想要求评估我的脚本,因为它可能会降低复杂性和行数。
此脚本的目的是从 Amazon S3 下载随机、加密的 MySQL 备份、恢复转储并运行一些随机 MySQL 查询。
我不确定如何通过电子邮件发送 printf 语句的输出 - 一个用于标题,第二个用于实际数据。我尝试格式化输出,使其如下所示,但我不得不从循环中排除标题:
Database: Table: Entries:
database1 random_table 0
database2 random_table 0
database3 random_table 0
database4 random_table 0
我想将此输出包含在电子邮件中,并根据脚本的成功/失败更改电子邮件主题。
如果循环和 MySQL 查询可能很复杂,我可能会使用很多。
脚本:
#!/usr/bin/env bash
# DB Details:
db_user="user"
db_pass="password"
db_host="localhost"
# Date
date_stamp=$(date +%d%m%Y)
# Initial Setup
data_dir="/tmp/backup"
# Checks
if [ ! -e /usr/bin/s3cmd ]; then
echo "Required package (http://s3tools.org/s3cmd)"
exit 2
fi
if [ -e /usr/bin/gpg ]; then
gpg_key=$(gpg -K | tr -d "{<,>}" | awk '/an@example.com/ { print $4 }')
if [ "$gpg_key" != "an@example.com" ]; then
echo "No GPG key"
exit 2
fi
else
echo "No GPG package"
exit 2
fi
if [ -d $data_dir ]; then
rm -rf $data_dir/* && chmod 700 $data_dir
else
mkdir $data_dir && chmod 700 $data_dir
fi
# S3 buckets
bucket_1=s3://test/
# Download backup
for backup in $(s3cmd ls s3://test/ | awk '{ print $2 }')
do
latest=$(s3cmd ls $backup | awk '{ print $2 }' | sed -n '$p')
random=$(s3cmd ls $latest | shuf | awk '{ print $4 }' | sed -n '1p')
s3cmd get $random $data_dir >/dev/null 2>&1
done
# Decrypting Files
for file in $(ls -A $data_dir)
do
filename=$(echo $file | sed 's/\.e//')
gpg --out $data_dir/$filename --decrypt $data_dir/$file >/dev/null 2>&1 && rm -f $data_dir/$file
if [ $? -eq 0 ]; then
# Decompressing Files
bzip2 -d $data_dir/$filename
if [ $? -ne 0 ]; then
echo "Decompression Failed!"
fi
else
echo "Decryption Failed!"
exit 2
fi
done
# MySQL Restore
printf "%-40s%-30s%-30s\n\n" Database: Table: Entries:
for dump in $(ls -A $data_dir)
do
mysql -h $db_host -u $db_user -p$db_pass < $data_dir/$dump
if [ $? -eq 0 ]; then
# Random DBs query
db=$(echo $dump | sed 's/\.sql//')
random_table=$(mysql -h $db_host -u $db_user -p$db_pass $db -e "SHOW TABLES" | grep -v 'Tables' | shuf | sed -n '1p')
db_entries=$(mysql -h $db_host -u $db_user -p$db_pass $db -e "SELECT * FROM $random_table" | grep -v 'id' | wc -l)
printf "%-40s%-30s%-30s\n" $db $random_table $db_entries
mysql -h $db_host -u $db_user -p$db_pass -e "DROP DATABASE $db"
else
echo "The system was unable to restore backups!"
rm -rf $data_dir
exit 2
fi
done
#Remove backups
rm -rf $data_dir