supervisor 是一个用python2 开发的 进程管理工具，我用了7/8年了，非常好用，最早是做搜索的时候5000台服务器上的程序都用它管理，一直用到现在
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.
py2迁移到python3是个大的趋势，从官网看，supervisor迁移到python3还没有实现，估计作者也没有啥动力继续开发了
用python3跑supservisor其实是个假命题，我当初还纠结了一番，着相了，它本身和被管理的程序是进程隔离的，业务程序完全可以用python3，python4运行，supervisor自身用python2跑 毫无问题，安装也方便, py2 迁移到py3 和supservisor没有关系
apt install supervisor
现在业内主流是用systemctl 管理进程，这个是 /etc/init.d 机制的替代,功能强大，无需用额外安装程序。实际上，安装supervisor之后，supervisor本身也是用systemctl管理的，成了套娃
我还是习惯用supervisor，会坚持用到python2被linux放弃