脚本如何批量执行远程命令行

wen 实用脚本 2026-06-25 265

本文目录导读：

脚本如何批量执行远程命令行

SSH + Shell 脚本 (Linux/Unix)
使用 parallel-ssh (pssh)
Python 脚本 (使用 paramiko)
Ansible (推荐)
使用 expect 脚本
使用 Fabric (Python)
高级 Shell 脚本示例
Docker 容器批量管理
使用 tmux 批量管理
快捷实用脚本
使用建议

SSH + Shell 脚本 (Linux/Unix)

使用密码认证 (需要 sshpass)

#!/bin/bash
# bulk_ssh.sh
SERVER_LIST="server1 server2 server3"
USERNAME="your_user"
PASSWORD="your_password"
COMMAND="df -h"
for server in $SERVER_LIST; do
    echo "=== Executing on $server ==="
    sshpass -p "$PASSWORD" ssh -o StrictHostKeyChecking=no "$USERNAME@$server" "$COMMAND"
done

使用密钥认证

#!/bin/bash
HOSTS=(
    "192.168.1.10"
    "192.168.1.11"
    "192.168.1.12"
)
USER="root"
COMMAND="uptime && free -h"
for host in "${HOSTS[@]}"; do
    echo "Connecting to $host..."
    ssh -i ~/.ssh/id_rsa -o ConnectTimeout=5 "$USER@$host" "$COMMAND"
done

使用 parallel-ssh (pssh)

#!/bin/bash
# 安装: apt-get install pssh 或 pip install pssh
# 创建主机列表文件
cat > hosts.txt << EOF
user1@192.168.1.10
user2@192.168.1.11
user3@192.168.1.12
EOF
# 并行执行命令
pssh -h hosts.txt -l root -A -i "uptime && docker ps"
# 参数说明：
# -h: 主机列表文件
# -l: 用户名
# -A: 询问密码
# -i: 显示输出
# -p: 并行数 (默认32)

Python 脚本 (使用 paramiko)

#!/usr/bin/env python3
# bulk_exec.py
import paramiko
import threading
from concurrent.futures import ThreadPoolExecutor
def execute_remote(host, username, password, command):
    """在远程主机执行命令"""
    try:
        ssh = paramiko.SSHClient()
        ssh.set_missing_host_key_policy(paramiko.AutoAddPolicy())
        ssh.connect(host, username=username, password=password, timeout=10)
        stdin, stdout, stderr = ssh.exec_command(command)
        output = stdout.read().decode('utf-8')
        error = stderr.read().decode('utf-8')
        print(f"\n=== {host} ===")
        if output:
            print(f"Output:\n{output}")
        if error:
            print(f"Error:\n{error}")
        ssh.close()
        return True
    except Exception as e:
        print(f"Failed to connect to {host}: {str(e)}")
        return False
def main():
    # 服务器配置
    servers = [
        {"host": "192.168.1.10", "user": "root", "pass": "pass1"},
        {"host": "192.168.1.11", "user": "root", "pass": "pass2"},
        {"host": "192.168.1.12", "user": "admin", "pass": "pass3"},
    ]
    command = input("请输入要执行的命令: ")
    # 并行执行
    with ThreadPoolExecutor(max_workers=10) as executor:
        futures = []
        for server in servers:
            future = executor.submit(
                execute_remote,
                server["host"],
                server["user"], 
                server["pass"],
                command
            )
            futures.append(future)
        # 等待所有完成
        for future in futures:
            future.result()
if __name__ == "__main__":
    main()

Ansible (推荐)

---
- name: 批量执行命令
  hosts: all
  gather_facts: no
  vars:
    ansible_ssh_private_key_file: /path/to/private/key
  tasks:
    - name: 执行系统命令
      shell: |
        uptime
        free -h
        df -h
      register: result
    - name: 显示结果
      debug:
        msg: "{{ result.stdout_lines }}"

使用 ansible-adhoc (一行命令)

# 单条命令
ansible all -i inventory.ini -m shell -a "df -h" -u root -k
# 多条命令
ansible all -i inventory.ini -m shell -a "uptime; free -h; who" -u root -k

使用 expect 脚本

#!/usr/bin/expect -f
# batch_exec.exp
set timeout 10
set servers {server1 server2 server3}
set username "admin"
set password "password123"
set command "hostname && date"
foreach server $servers {
    spawn ssh $username@$server
    expect {
        "password:" {
            send "$password\r"
        }
        "yes/no" {
            send "yes\r"
            exp_continue
        }
    }
    expect "$ "
    send "$command\r"
    expect "$ "
    puts "\n--- Completed on $server ---"
    send "exit\r"
}

使用 Fabric (Python)

#!/usr/bin/env python3
# bulk_fabric.py
from fabric import Connection, Config
from concurrent.futures import ThreadPoolExecutor
def execute_command(host, user, command):
    """在单个主机执行命令"""
    try:
        config = Config(overrides={
            'connect_kwargs': {'password': 'your_password'}
        })
        with Connection(
            host=host,
            user=user,
            config=config,
            connect_kwargs={'timeout': 10}
        ) as conn:
            result = conn.run(command, hide=True)
            print(f"\n=== {host} ===")
            print(result.stdout)
    except Exception as e:
        print(f"Error on {host}: {e}")
def main():
    hosts = [
        "192.168.1.10",
        "192.168.1.11", 
        "192.168.1.12"
    ]
    command = "uptime && free -h"
    with ThreadPoolExecutor(max_workers=5) as executor:
        for host in hosts:
            executor.submit(execute_command, host, "root", command)
if __name__ == "__main__":
    main()

高级 Shell 脚本示例

#!/bin/bash
# 批量部署检查脚本
# 配置
SERVER_FILE="servers.txt"
LOG_DIR="./logs"
SSH_USER="root"
SSH_KEY="~/.ssh/id_rsa"
TIMEOUT=5
# 创建日志目录
mkdir -p "$LOG_DIR"
# 检查主机列表
if [ ! -f "$SERVER_FILE" ]; then
    echo "错误: 找不到服务器列表文件 $SERVER_FILE"
    echo "格式: IP 或 hostname, 每行一个"
    exit 1
fi
# 定义要执行的命令数组
COMMANDS=(
    "echo '=== 系统信息 ==='; uname -a"
    "echo '=== 内存使用 ==='; free -h"
    "echo '=== 磁盘使用 ==='; df -h"
    "echo '=== 运行时间 ==='; uptime"
    "echo '=== Docker 容器 ==='; docker ps --format 'table {{.Names}}\t{{.Status}}' 2>/dev/null || echo 'Docker not installed'"
)
# 进度显示
show_progress() {
    local current=$1
    local total=$2
    local percent=$((current * 100 / total))
    printf "\rProgress: [%-50s] %d%%" $(printf '#%.0s' $(seq 1 $((percent / 2)))) $percent
}
# 主执行函数
execute_remote() {
    local server=$1
    local log_file="$LOG_DIR/${server//./_}_$(date +%Y%m%d_%H%M%S).log"
    {
        echo "========================================"
        echo "执行时间: $(date '+%Y-%m-%d %H:%M:%S')"
        echo "服务器: $server"
        echo "========================================"
        for cmd in "${COMMANDS[@]}"; do
            echo -e "\n--- 执行命令: $cmd ---"
            ssh -i "$SSH_KEY" -o ConnectTimeout=$TIMEOUT \
                -o StrictHostKeyChecking=no \
                "$SSH_USER@$server" "$cmd" 2>&1
        done
    } > "$log_file"
    # 检查是否成功
    if [ $? -eq 0 ]; then
        echo "$server: 成功" >> "$LOG_DIR/summary.log"
    else
        echo "$server: 失败" >> "$LOG_DIR/summary.log"
    fi
}
# 读取服务器列表并执行
echo "开始批量执行..."
total_servers=$(wc -l < "$SERVER_FILE")
counter=0
while IFS= read -r server; do
    [ -z "$server" ] && continue  # 跳过空行
    server=$(echo "$server" | tr -d '[:space:]')
    ((counter++))
    show_progress $counter $total_servers
    execute_remote "$server" &
    # 控制并发数
    while [ $(jobs -r | wc -l) -ge 10 ]; do
        sleep 1
    done
done < "$SERVER_FILE"
# 等待所有后台任务完成
wait
echo -e "\n\n执行完成!"
echo "详细日志保存在: $LOG_DIR/"
cat "$LOG_DIR/summary.log"
# 生成汇总报告
echo ""
echo "========================================"
echo "执行汇总"
echo "========================================"
echo "成功: $(grep -c "成功" $LOG_DIR/summary.log) 台"
echo "失败: $(grep -c "失败" $LOG_DIR/summary.log) 台"
echo "总共: $total_servers 台"

Docker 容器批量管理

#!/bin/bash
# Docker 批量管理脚本
# 定义Docker主机
declare -A DOCKER_HOSTS
DOCKER_HOSTS=(
    ["server1"]="192.168.1.10"
    ["server2"]="192.168.1.11"
    ["server3"]="192.168.1.12"
)
# 要执行的Docker命令
DOCKER_COMMANDS=(
    "docker ps --format 'table {{.Names}}\t{{.Status}}'"
    "docker stats --no-stream"
    "docker system df"
)
for host_name in "${!DOCKER_HOSTS[@]}"; do
    host_ip=${DOCKER_HOSTS[$host_name]}
    echo "=========================================="
    echo "处理服务器: $host_name ($host_ip)"
    echo "=========================================="
    # 设置Docker远程API
    export DOCKER_HOST="tcp://$host_ip:2375"
    for cmd in "${DOCKER_COMMANDS[@]}"; do
        echo "--- 执行: $cmd ---"
        eval "$cmd" 2>&1 || echo "执行失败"
        echo ""
    done
done

使用 tmux 批量管理

#!/bin/bash
# tmux_bulk.sh - 使用tmux同步操作
SESSION="admin_session"
SERVERS=("server1" "server2" "server3")
# 创建tmux会话
tmux new-session -d -s "$SESSION"
# 创建窗口
for i in "${!SERVERS[@]}"; do
    if [ $i -eq 0 ]; then
        window="0"
    else
        tmux new-window -t "$SESSION:$i"
        window="$i"
    fi
    # SSH到远程服务器
    tmux send-keys -t "$SESSION:$window" "ssh ${SERVERS[$i]}" Enter
done
# 开启同步（主控模式）
tmux set-window-option -t "$SESSION:0" synchronize-panes on
# 附加到会话
tmux attach-session -t "$SESSION"
echo "提示: 在任意窗口输入命令，所有窗口会同步执行"
echo "按 Ctrl+B + Alt + 方向键 切换窗口"
echo "输入 exit 退出连接"

快捷实用脚本

#!/bin/bash
# 常用命令快捷批量执行
# 1. 批量更新系统
update_system() {
    for host in $(cat servers.txt); do
        ssh "$host" "apt update && apt upgrade -y"
    done
}
# 2. 批量检查服务
check_services() {
    local services=("nginx" "mysql" "docker" "ssh")
    for host in $(cat servers.txt); do
        echo "=== $host ==="
        for service in "${services[@]}"; do
            status=$(ssh "$host" "systemctl is-active $service" 2>/dev/null)
            echo "$service: $status"
        done
    done
}
# 3. 批量重启服务
restart_services() {
    local services=$@
    for host in $(cat servers.txt); do
        echo "Restarting on $host..."
        for service in $services; do
            ssh "$host" "systemctl restart $service"
        done
    done
}
# 主菜单
case "$1" in
    update)
        update_system
        ;;
    check)
        check_services
        ;;
    restart)
        shift
        restart_services $@
        ;;
    *)
        echo "用法: $0 {update|check|restart [service]}"
        exit 1
        ;;
esac

使用建议

安全性:
- 优先使用 SSH 密钥认证
- 不要在脚本中硬编码密码
- 考虑使用 SSH Agent
性能优化:
- 使用并行执行提高效率
- 控制并发数避免负载过高
- 设置超时防止脚本挂起
错误处理:
- 添加连接失败重试机制
- 记录详细日志
- 提供执行结果汇总
选择建议:
- 小型环境：Shell脚本 + sshpass
- 中型环境：Python + paramiko
- 大型环境：Ansible/Fabric
- Docker环境：Docker API + 脚本

选择哪种方式取决于你的具体需求、环境规模和安全要求。

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