Supervisor简介

Supervisor is a client/server system that allows its users to monitor and control a number of processes on UNIX-like operating systems.

It shares some of the same goals of programs like launchd, daemontools, and runit. Unlike some of these programs, it is not meant to be run as a substitute for init as “process id 1”. Instead it is meant to be used to control processes related to a project or a customer, and is meant to start like any other program at boot time.

Supervisor是用Python开发的一套通用的进程管理程序，能将一个普通的命令行进程变为后台daemon，并监控进程状态，异常退出时能自动重启。它是通过fork/exec的方式把这些被管理的进程当作supervisor的子进程来启动，这样只要在supervisor的配置文件中，把要管理的进程的可执行文件的路径写进去即可。也实现当子进程挂掉的时候，父进程可以准确获取子进程挂掉的信息，可以选择是否自己启动和报警。supervisor还提供了一个功能，可以为supervisord或者每个子进程，设置一个非root的user，这个user就可以管理它对应的进程。

安装Supervisor

基于CentOS7

1、安装supervisor

# 方法一
yum install epel-release
yum install supervisor

# 方法二
yum install python-pip
pip install supervisor

2、准备配置文件

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mkdir -p /etc/supervisor/
echo_supervisord_conf > /etc/supervisord.conf
vim /etc/supervisord.conf

修改配置文件，添加：

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[include]
files = /etc/supervisor/*.ini
;files = /etc/supervisor/*.conf

3、启动服务&设置开机启动

1 2	systemctl start supervisord systemctl enable supervisord

基于pyenv

如果系统的Python版本不适合Supservisor运行，那么可以使用pyenv切换Python环境安装Supervisor。
参考《Python版本管理器pyenv》，安装好python2.7.13。

1、新建supervisor环境

1	pyenv virtualenv 2.7.13 supervisor

2、激活supervisor环境

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source /root/.pyenv/versions/2.7.13/envs/supervisor/bin/activate supervisor
# or
source activate supervisor

3、安装supervisor

1	pip install supervisor

4、准备配置文件

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mkdir -p /etc/supervisor/
echo_supervisord_conf > /etc/supervisord.conf
vim /etc/supervisord.conf

修改配置文件，添加：

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[include]
files = /etc/supervisor/*.ini
;files = /etc/supervisor/*.conf

5、测试运行

1	/root/.pyenv/versions/2.7.13/envs/supervisor/bin/supervisord -c /etc/supervisord.conf

6、配置supervisord.service

1	vi /usr/lib/systemd/system/supervisord.service

修改为：

[Unit]
Description=Process Monitoring and Control Daemon
After=rc-local.service nss-user-lookup.target

[Service]
Type=forking
ExecStart=/root/.pyenv/versions/2.7.13/envs/supervisor/bin/supervisord -c /etc/supervisord.conf  
ExecReload=/root/.pyenv/versions/2.7.13/envs/supervisor/bin/supervisorctl reload       
ExecStop=/root/.pyenv/versions/2.7.13/envs/supervisor/bin/supervisorctl shutdown      

[Install]
WantedBy=multi-user.target

7、重新启动服务&设置开机启动

ps aux | grep supervisord
systemctl stop supervisord
systemctl start supervisord
systemctl enable supervisord

常用命令

# 重启supervisor
systemctl retart supervisord

# 重启被管理的服务
supervisorctl -c /etc/supervisord.conf restart service_name

# 查看被管理的服务状态
supervisorctl status

# 重新加载配置
supervisorctl restart

Supervisor实战

管理tomcat

参考《CentOS7设置tomcat开机自启动》。

管理Jupyter

参考《CentOS安装配置Jupyter》。

管理Django

参考Django部署到线上（修改版）。

好好学习，天天向上！

Linux安装配置Supervisor