python中启动多个服务的三种方法详解

python app1.py & python app2.py

nohup python app1.py &
nohup python app2.py &

import subprocess
import os

# 启动FastAPI服务
fastapi_process = subprocess.Popen(['python', 'app1.py'])

# 启动其他服务
other_service_process = subprocess.Popen(['python', 'app2.py'])

# 等待所有进程完成（如果需要）
fastapi_process.wait()
other_service_process.wait()

pip install supervisor

[program:fastapi]
command=python app1.py
autostart=true
autorestart=true
stderr_logfile=/var/log/fastapi.err.log
stdout_logfile=/var/log/fastapi.out.log
[program:otherservice]
command=python app2.py
autostart=true
autorestart=true
stderr_logfile=/var/log/otherservice.err.log
stdout_logfile=/var/log/otherservice.out.log

supervisord -c /etc/supervisor/supervisord.conf

supervisorctl status
supervisorctl start fastapi
supervisorctl stop otherservice

#!/bin/bash
# 定义日志文件路径（可选，建议添加，便于排查问题）
LOG_DIR="./logs"
mkdir -p $LOG_DIR  # 确保日志目录存在
# 启动 Service 1（端口 8081），后台运行并输出日志
echo "Starting Service 1..."
python3 service1.py > $LOG_DIR/service1.log 2>&1 &
SERVICE1_PID=$!  # 记录进程 ID，可选（用于后续关闭服务）
# 启动 Service 2（端口 8082），后台运行并输出日志
echo "Starting Service 2..."
python3 service2.py > $LOG_DIR/service2.log 2>&1 &
SERVICE2_PID=$!
# 输出启动成功信息和进程 ID
echo "Services started successfully!"
echo "Service 1 PID: $SERVICE1_PID (log: $LOG_DIR/service1.log)"
echo "Service 2 PID: $SERVICE2_PID (log: $LOG_DIR/service2.log)"

#!/bin/bash
# 定义日志文件路径
LOG_DIR="./logs"
mkdir -p $LOG_DIR
# 启动 Service 1（端口 8081）
echo "Starting Service 1 on port 8081..."
python3 service1.py --port 8081 > $LOG_DIR/service1.log 2>&1 &
SERVICE1_PID=$!
# 启动 Service 2（端口 8082）
echo "Starting Service 2 on port 8082..."
python3 service2.py --port 8082 > $LOG_DIR/service2.log 2>&1 &
SERVICE2_PID=$!
echo "Services started successfully!"
echo "Service 1 (Port 8081) PID: $SERVICE1_PID"
echo "Service 2 (Port 8082) PID: $SERVICE2_PID"

#!/bin/bash
# 配置参数
PYTHON_CMD="python3"  # Python 命令（若用虚拟环境，需改为绝对路径，如 /path/to/venv/bin/python）
SERVICE1_SCRIPT="service1.py"
SERVICE2_SCRIPT="service2.py"
LOG_DIR="./logs"
PID_DIR="./pids"  # 保存 PID 文件，便于统一管理
# 创建目录
mkdir -p $LOG_DIR $PID_DIR
# 检查 Python 环境
if ! command -v $PYTHON_CMD &> /dev/null; then
    echo "Error: $PYTHON_CMD not found! Please install Python 3."
    exit 1
fi
# 检查服务脚本是否存在
for script in $SERVICE1_SCRIPT $SERVICE2_SCRIPT; do
    if [ ! -f "$script" ]; then
        echo "Error: Script $script not found in current directory!"
        exit 1
    fi
done
# 启动服务的函数（复用逻辑）
start_service() {
    local script=$1
    local port=$2  # 服务端口（用于日志区分）
    local log_file="$LOG_DIR/service_${port}.log"
    local pid_file="$PID_DIR/service_${port}.pid"
    echo "Starting $script on port $port..."
    $PYTHON_CMD $script > $log_file 2>&1 &
    local pid=$!
    echo $pid > $pid_file  # 保存 PID 到文件
    # 检查是否启动成功（5秒超时）
    sleep 2
    if ps -p $pid > /dev/null; then
        echo "Success: $script started (PID: $pid, log: $log_file)"
    else
        echo "Error: $script failed to start! Check log: $log_file"
        rm -f $pid_file  # 启动失败，删除 PID 文件
    fi
}
# 启动两个服务（传入脚本和端口）
start_service $SERVICE1_SCRIPT 8081
start_service $SERVICE2_SCRIPT 8082
echo "All services startup completed."

#!/bin/bash
# 配置参数
PYTHON_CMD="python3"
SERVICE1_SCRIPT="service1.py"
SERVICE2_SCRIPT="service2.py"
PORT1=8081
PORT2=8082
LOG_DIR="./logs"
PID_DIR="./pids"
# 创建目录
mkdir -p $LOG_DIR $PID_DIR
# 检查 Python 环境和脚本
if ! command -v $PYTHON_CMD &> /dev/null; then
    echo "Error: $PYTHON_CMD not found!"
    exit 1
fi
for script in $SERVICE1_SCRIPT $SERVICE2_SCRIPT; do
    if [ ! -f "$script" ]; then
        echo "Error: Script $script not found!"
        exit 1
    fi    fi
done
# 启动服务的函数
start_service() {
    local script=$1
    local port=$2
    local name=$3
    local log_file="$LOG_DIR/${name}.log"
    local pid_file="$PID_DIR/${name}.pid"
    echo "Starting $name on port $port..."
    $PYTHON_CMD $script --port $port > $log_file 2>&1 &
    local pid=$!
    echo $pid > $pid_file
    # 等待几秒检查服务是否正常启动
    sleep 3
    if ps -p $pid > /dev/null; then
        echo "✅ Success: $name started (PID: $pid, Port: $port)"
        return 0
    else
        echo "❌ Error: $name failed to start! Check log: $log_file"
        rm -f $pid_file
        return 1
    fi
}
# 启动两个服务
start_service $SERVICE1ERVICE1_SCRIPT $PORT1 "service1"
start_service $SERVICE2_SCRIPT $PORT2 "service2"
echo ""
echo "🎉 All services startup completed."
echo "📝 Logs location: $LOG_DIR/"
echo "📋 Process IDs saved in: $PID_DIR/"