一、多个同样服务

作用：提高服务器的并发能力

优点：相比于docker-swarm的横向扩展节省了环境安装的空间能充分利用一个机器(容器)中的环境

缺点：相比于单个服务更占用内存，一个机器(容器)挂大家都挂

1.gunicorn

Running Gunicorn — Gunicorn 20.1.0 documentation

①简单配置

# config.py文件
reload = True
daemon = False
bind = '0.0.0.0:5000'
worker_class = 'sanic.worker.GunicornWorker'
loglevel = 'info'
accesslog = 'access.log'
access_log_format = '%(h)s %(l)s %(u)s %(t)s "%(r)s" %(s)s %(b)s "%(f)s" "%(a)s"'

②启动指令

gunicorn -k gevent -w 4 --config config.py python程序脚本:app --access-logfile '-'

2.注意的点

①安装环境

# requirements.txt
gevent
gunicorn

②对应日志

# 主程序中的配置
import logging.config
from logger_config import LOGGING_CONFIG
logging.config.dictConfig(LOGGING_CONFIG)

"""
这里是flask服务代码
"""


gunicorn_logger = logging.getLogger('gunicorn.info')
app.logger.handlers = gunicorn_logger.handlers
app.logger.setLevel(gunicorn_logger.level)

# logger_config中的常用配置
LOGGING_CONFIG = {
    "version": 1,
    "formatters": {
        "default": {
            'format': '%(asctime)s %(filename)s %(lineno)s %(levelname)s %(message)s',
        },
        "plain": {
            "format": "%(message)s",
        },
    },
    "handlers": {
        "console": {
            "class": "logging.StreamHandler",
            "level": "DEBUG",
            "formatter": "default",
        },
        "console_plain": {
            "class": "logging.StreamHandler",
            "level": "INFO",
            "formatter": "plain"
        },
        "file": {
            "class": "logging.FileHandler",
            "level": "INFO",
            "filename": "./log.txt",
            "formatter": "default",
        }
    },
    "loggers": {
        "debug_logger": {
            "handlers": ["console"],
            "level": "DEBUG",
            "propagate": False,
        },
        "online_logger": {
            "handlers": ["console"],
            "level": "INFO",
            "propagate": False,
        },
        "console_plain_logger": {
            "handlers": ["console_plain"],
            "level": "DEBUG",
            "propagate": False,
        },
        "file_logger": {
            "handlers": ["file"],
            "level": "INFO",
            "propagate": False,
        }
    },
    "root": {"level": "DEBUG", "handlers": ["console"]},
}

二、多个不同服务

作用：方便部署和协调服务的编排

优点：相比docker-compose的方式启动多个服务能更好的利用同一个机器的资源，相比shell有很多可靠的启动重启机制使用

缺点：使用独立机器，机器挂服务都挂，

1.supervisord

Configuration File — Supervisor 4.2.4 documentation (supervisord.org)

①简单配置

# supervisord.conf
; supervisor config file

[unix_http_server]
file=/tmp/supervisor.sock   ; (the path to the socket file)
chmod=0700                       ; sockef file mode (default 0700)

[supervisord]
nodaemon=true
logfile=/tmp/supervisord.log ; (main log file;default $CWD/supervisord.log)
pidfile=/tmp/supervisord.pid ; (supervisord pidfile;default supervisord.pid)
childlogdir=/tmp           ; ('AUTO' child log dir, default $TEMP)

; the below section must remain in the config file for RPC
; (supervisorctl/web interface) to work, additional interfaces may be
; added by defining them in separate rpcinterface: sections
[rpcinterface:supervisor]
supervisor.rpcinterface_factory = supervisor.rpcinterface:make_main_rpcinterface


[supervisorctl]
serverurl=unix:///var/run/supervisor.sock ; use a unix:// URL  for a unix socket

; The [include] section can just contain the "files" setting.  This
; setting can list multiple files (separated by whitespace or
; newlines).  It can also contain wildcards.  The filenames are
; interpreted as relative to this file.  Included files *cannot*
; include files themselves.


[program:progrm_name1]
# 启动命令入口
command=启动命令1

# 命令程序所在目录(要用绝对路径)
directory=/app  
#运行命令的用户名
# user=root

autostart=true
autorestart=true
#日志地址
redirect_stderr = true
#stderr_logfile=/var/log/%(program_name)s.log
#stdout_logfile=/var/log/%(program_name)s.log
loglevel=info
stdout_logfile=/dev/stdout
stdout_logfile_maxbytes=0

[program:progrm_name2]
# 启动命令入口
command=启动命令2

# 命令程序所在目录(要用绝对路径)
directory=/app

autostart=true
autorestart=true
#日志地址
redirect_stderr = true
#stderr_logfile=/var/log/%(program_name)s.log
#stdout_logfile=/var/log/%(program_name)s.log
loglevel=info
stdout_logfile=/dev/stdout
stdout_logfile_maxbytes=0

②启动指令

supervisord -c supervisord.conf

2.注意的点

①安装环境

supervisor(==4.2.4)