vi /etc/systemd/system/nginx-container.service，信息如下：

[Unit]
Description=Nginx Docker Container
Requires=docker.service
After=docker.service
Wants=network-online.target

[Service]
Type=forking
Restart=always
RestartSec=10
TimeoutStartSec=0
ExecStart=/usr/local/bin/start-nginx-container
#ExecStop=/usr/bin/docker stop -t 10 nginx

[Install]
WantedBy=multi-user.target

vi /usr/local/bin/start-nginx-container，信息如下：

#!/bin/bash

CONTAINER_NAME="nginx"
COMPOSE_DIR="/root/nginx"

echo "监控容器: $CONTAINER_NAME"


# 检查容器是否在运行（docker ps 查看运行中的容器）
if ! docker ps --format '{{.Names}}' | grep -q "^$CONTAINER_NAME$"; then
        echo "$(date): 容器 $CONTAINER_NAME 未运行"

        # 先尝试启动已有容器
        if docker start "$CONTAINER_NAME" 2>/dev/null; then
                echo "$(date): 成功启动已有容器"
        else
                echo "$(date): 没有找到容器，尝试使用docker-compose重新创建"
                cd "$COMPOSE_DIR" && docker-compose up -d
        fi
fi

systemctl daemon-reload
systemctl enable nginx-container.service
systemctl start nginx-container.service

# 查看服务状态
sudo systemctl status nginx-container

# 查看日志
sudo journalctl -u nginx-container -f

# 手动重启服务
sudo systemctl restart nginx-container

# 停止服务（这会停止监控，但容器可能还在运行）
sudo systemctl stop nginx-container

# 禁用开机启动
sudo systemctl disable nginx-container

#一、 创建监控脚本
sudo tee /usr/local/bin/monitor-nginx-container > /dev/null << 'EOF'
#!/bin/bash

CONTAINER_NAME="nginx"
COMPOSE_DIR="/root/nginx"
CHECK_INTERVAL=10

trap "echo '监控进程收到信号，退出...'; exit 0" SIGTERM SIGINT

echo "开始监控容器: $CONTAINER_NAME"

check_and_start() {
    if ! docker ps --format '{{.Names}}' | grep -q "^$CONTAINER_NAME$"; then
        echo "$(date '+%Y-%m-%d %H:%M:%S'): 容器 $CONTAINER_NAME 未运行"
        
        if docker start "$CONTAINER_NAME" 2>/dev/null; then
            echo "$(date '+%Y-%m-%d %H:%M:%S'): 成功启动已有容器"
            return 0
        else
            echo "$(date '+%Y-%m-%d %H:%M:%S'): 尝试使用 docker-compose 重新创建"
            if cd "$COMPOSE_DIR" && docker-compose up -d 2>&1; then
                echo "$(date '+%Y-%m-%d %H:%M:%S'): 容器创建成功"
                return 0
            else
                echo "$(date '+%Y-%m-%d %H:%M:%S'): 容器创建失败"
                return 1
            fi
        fi
    fi
    return 0
}

check_and_start

while true; do
    for ((i=0; i<CHECK_INTERVAL; i++)); do
        sleep 1
    done
    
    if ! docker ps --format '{{.Names}}' | grep -q "^$CONTAINER_NAME$"; then
        echo "$(date '+%Y-%m-%d %H:%M:%S'): 检测到容器停止，尝试重新启动..."
        check_and_start
    fi
done
EOF

# 赋予执行权限
sudo chmod +x /usr/local/bin/monitor-nginx-container

#二、 创建 systemd 服务
sudo tee /etc/systemd/system/nginx-container.service > /dev/null << 'EOF'
[Unit]
Description=Nginx Docker Container Monitor
Requires=docker.service
After=docker.service
Wants=network-online.target

[Service]
Type=simple
Restart=always
RestartSec=10
StartLimitInterval=0
User=root
Group=root
StandardOutput=journal
StandardError=journal
ExecStart=/usr/local/bin/monitor-nginx-container
ExecReload=/bin/kill -HUP $MAINPID
KillSignal=SIGTERM
TimeoutStopSec=30

[Install]
WantedBy=multi-user.target
EOF

# 重新加载 systemd 并启用服务
sudo systemctl daemon-reload
sudo systemctl enable nginx-container.service
sudo systemctl start nginx-container.service

# 检查服务状态
sudo systemctl status nginx-container.service