Linux 的后台程序运行有很多中方法，例如 nohub、screen 、tmux 等，但是有些业务对进程的要求比较严格，要成为守护进程，并且可以监控运行状态，最好还可以意外结束后自动重启，supervisor 就可以满足这个需求。官方文档

使用 supervisor 监护进程时，被监护的进程不能是守护进程。

安装

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sudo apt install supervisor

安装后自动安装 supervisorctl 工具，用来管理 supervisord 进程。

输出 supervisorctl 帮助文档 supervisor help：

add – Activates any updates in config for process/group

avail – Display all configured processes

clear – Clear single/multiple/all process log files

fg – Connect to a process in foreground mode

help – Show help

maintail – tail of supervisor main log file

open – Connect to a remote supervisord process. (for UNIX domain socket, use unix:///socket/path)

pid – Get the PID of process/supervisord

quit exit – Exit the supervisor shell

reload – Restart the remote supervisord

remove – Removes process/group from active config

reread – Reload the daemon’s configuration files

restart – Restart process, group or all

shutdown – Shut the remote supervisord down

start – Start process, group or all

status – Get process/group status info

stop – Stop process, group or all

tail – tail of process stdout

update – Reload config and add/remove as necessary

version – Show the version of the remote supervisord process

配置文件

安装成功后会在 /etc/supervisor 下生成两个目录

├── conf.d

└── supervisord.conf

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# supervisord.conf
; supervisor config file

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

[supervisord]
logfile=/var/log/supervisor/supervisord.log ; (main log file;default $CWD/supervisord.log)
pidfile=/var/run/supervisord.pid ; (supervisord pidfile;default supervisord.pid)
childlogdir=/var/log/supervisor            ; ('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.

[include]
files = /etc/supervisor/conf.d/*.conf

这是 supervisor 的配置文件，其中定义了日志文件位置、进程位置等信息，最后面的 include 就是要添加的进行配置文件位置的定义。

添加一个自定义进程

进入到 /etc/supervisor/conf.g/ 目录下，创建一个进程为名，conf 结尾的文件。并输入以下内容

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sudo vim app.conf
[program:tp6] # tp6 为进程名
command=php -S localhost:8000 # 进程命令
directory=/home/caoayu/Github/tp6/public # 目录
user=caoayu # 用户
stdout_logfile=/tmp/tp.out.log # 输出日志位置
stderr_logfile=/tmp/tp.err.log # 错误日志位置

关于配置文件的全部内容

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[program:cat]
command=/bin/cat
process_name=%(program_name)s
numprocs=1
directory=/tmp
umask=022
priority=999
autostart=true
autorestart=unexpected
startsecs=10
startretries=3
exitcodes=0
stopsignal=TERM
stopwaitsecs=10
stopasgroup=false
killasgroup=false
user=chrism
redirect_stderr=false
stdout_logfile=/a/path
stdout_logfile_maxbytes=1MB
stdout_logfile_backups=10
stdout_capture_maxbytes=1MB
stdout_events_enabled=false
stderr_logfile=/a/path
stderr_logfile_maxbytes=1MB
stderr_logfile_backups=10
stderr_capture_maxbytes=1MB
stderr_events_enabled=false
environment=A="1",B="2"
serverurl=AUTO

运行

首先重载下 supervisor

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sudo supervisorctl reload

运行进程

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sudo supervisorctl start tp6 # or sudo supervisorctl start all

暂停

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sudo supervisorctl stop tp6

重启

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sudo supervisorctl restart tp6

使用 web 网页可视化管理

首先更改 supervisor 的配置文件，更改如下：

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# /etc/supervisor/supervisord.conf
# 加入以下内容
[inet_http_server]
port=127.0.0.1:9001
username=admin
password=123456

重载并更新配置

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sudo supervisorctl reload 
sudo supervisorctl update

打开配置好的地址与端口查看输出

image-20210321190540904

用这个可以更直观的对进程进行查看与管理。