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Engineer83
Asked: 2024-11-21 04:09:47 +0800 CST

用于从列表中备份目录的 Shell 脚本

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我有一个备份脚本，它可以完成这项工作，但需要很长时间才能完成，因为它将用户目录逐一与 DEV_Servers.txt 中的服务器列表进行对比。

有没有办法让 tar 命令同时针对所有服务器列表运行，而不是逐个浏览列表？

#!/bin/ksh
print  "==========================================="
print  "Taking backup of Users dir"
print  "==========================================="

serverList="DEV_Servers.txt"
while read -r server;
do
    print
    print "==========================================="
    print "Taking Backup of Users:" $server
    ssh -o StrictHostKeyChecking=no -n $server "cd /opt/test/ ; tar -zcvf 'Users$(date '+%Y%m%d').tar.gz' Users"
done < "$serverList"
shell

3 个回答

  1. Best Answer

    并行运行 tar 命令的一种方法是将每个 SSH 调用放在后台。您可以通过在每个 SSH 命令末尾附加一个 & 来实现这一点。以下是修改脚本的方法：

    #!/bin/ksh
print "==========================================="
print "Taking backup of Users dir"
print "==========================================="

serverList="DEV_Servers.txt"
while read -r server;
do
    print
    print "==========================================="
    print "Taking Backup of Users:" $server
    # Run tar command in the background
    ssh -o StrictHostKeyChecking=no -n $server "cd /opt/test/ ; tar -zcvf 'Users$(date '+%Y%m%d').tar.gz' Users" &
done < "$serverList"

# Wait for all background jobs to finish
wait
    • 命令末尾&的ssh告诉 shell 在后台运行该命令。
    • 该wait命令确保脚本在退出之前等待所有后台作业完成。
    • 1

  2. 未经测试：

    #!/bin/ksh
print  "==========================================="
print  "Taking backup of Users dir"
print  "==========================================="

serverList="DEV_Servers.txt"

do_one() {
    server="$1"
    print
    print "==========================================="
    print "Taking Backup of Users:" $server
    ssh -o StrictHostKeyChecking=no -n "$server" "cd /opt/test/ ; tar -zcvf 'Users$(date '+%Y%m%d').tar.gz' Users"
}
export -f do_one

parallel -j0 do_one < "$serverList"

    它要求ssh server不要求输入密码。如果你已经设置了，ssh-agent那就没问题了。

    • 1

  3. 这是一个 Bash 脚本，它从文件中读取目录列表并为每个目录创建备份。该脚本将每个目录压缩为一个.tar.gz文件，并将备份存储在指定的备份目录中。

    脚本：backup_dirs.sh

    #!/bin/bash

# Variables
DIR_LIST="directories.txt"  # File containing list of directories to back up
BACKUP_DIR="backup"         # Directory to store backups
DATE=$(date +%Y-%m-%d)      # Current date for timestamping backups

# Create the backup directory if it doesn't exist
mkdir -p "$BACKUP_DIR"

# Check if the list file exists
if [[ ! -f "$DIR_LIST" ]]; then
    echo "Error: File $DIR_LIST does not exist!"
    exit 1
fi

# Backup each directory listed in DIR_LIST
while IFS= read -r DIR; do
    # Skip empty lines or commented lines
    [[ -z "$DIR" || "$DIR" =~ ^# ]] && continue

    # Check if the directory exists
    if [[ -d "$DIR" ]]; then
        # Get the base name of the directory
        DIR_NAME=$(basename "$DIR")

        # Create the backup file name
        BACKUP_FILE="$BACKUP_DIR/${DIR_NAME}_${DATE}.tar.gz"

        # Create the tarball
        tar -czf "$BACKUP_FILE" -C "$(dirname "$DIR")" "$DIR_NAME"
        echo "Backup of $DIR completed: $BACKUP_FILE"
    else
        echo "Warning: Directory $DIR does not exist. Skipping."
    fi
done < "$DIR_LIST"

echo "Backup process completed."
    • 0

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