使用 Supervisor 管理进程
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
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
# 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
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
[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
sudo supervisorctl reload
运行进程
sudo supervisorctl start tp6 # or sudo supervisorctl start all
暂停
sudo supervisorctl stop tp6
重启
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：
# /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
sudo supervisorctl reload
sudo supervisorctl update
打开配置好的地址与端口查看输出
用这个可以更直观的对进程进行查看与管理。