supervisor 使用记录

### 安装 supervisor
```
pip install supervisor
```

> 也可以通过 apt 安装, 推荐使用pip安装
>
> apt install supervisor
> - supervisor配置文件： `/etc/supervisor/supervisord.conf`
> - 子进程配置文件路径：  `/etc/supervisor/conf.d/`

### 创建配置目录
```
sudo mkdir /opt/supervisor
chown -R dtdream:dtdream /opt/supervisor/
cd /opt/supervisor
```

### 生成默认配置文件
```
echo_supervisord_conf > /opt/supervisor/supervisord.conf
```

### 修改配置文件
```
vim /opt/supervisor/supervisord.conf
```

默认的配置文件将sock、pid等文件都放到/tmp目录下了，我们改到自己的目录下.修改以下内容：
```
[unix_http_server]
file=/opt/supervisor/supervisor.sock   ; the path to the socket file

[supervisord]
logfile=/opt/supervisor/supervisord.log ; main log file; default $CWD/supervisord.log
pidfile=/opt/supervisor/supervisord.pid ; supervisord pidfile; default supervisord.pid
directory=/opt/supervisor              ; default is not to cd during start
childlogdir=/opt/supervisor            ; 'AUTO' child log dir, default $TEMP

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

[include]
files = /opt/supervisor/program/*.ini
```

执行 supervisord 时默认会从以下路径读取配置文件

- ~/.local/etc/supervisord.conf
- ~/.local/supervisord.conf
- supervisord.conf
- etc/supervisord.conf
- /etc/supervisord.conf
- /etc/supervisor/supervisord.conf

将配置文件通过 `ln` 链接到默认路径
```
ln -s /opt/supervisor/supervisord.conf ~/.local/supervisord.conf
```

### 创建ini文件
创建program目录
```
mkdir /opt/supervisor/program
vim /opt/supervisor/program/rcsp.ini
```

```
[program:rcsp]
command=python3.7 odoo-bin.py -c server.conf     ; the program (relative uses PATH, can take args)
directory=/data/rcsp           ; directory to cwd to before exec (def no cwd)
redirect_stderr = true         ;把stderr重定向到stdout，默认false；
stdout_logfile=/data/rcsp/logs/stdout.log  ; stdout log path, NONE for none; default AUTO
stdout_logfile_maxbytes=50MB    ; max # logfile bytes b4 rotation (default 50MB)
stdout_logfile_backups=10      ; # of stdout logfile backups (0 means none, default 10)
;environment=A="1",B="2"       ; process environment additions (def no adds)
```

### 启动 supervisord
```
supervisord
```

### supervisorctl 的常见用法
```
supervisorctl status all	# 查看服务状态

supervisorctl reload		# 重载配置文件并重启supervisord和program
supervisorctl reread		# 读取当前运行配置和program配置文件的差异
supervisorctl update		# 重载配置文件并重启受影响的program
supervisorctl shutdown		# 关闭supervisord

supervisorctl start <program_name>		# 启动单个子进程
supervisorctl stop <program_name>		# 关闭单个子进程
supervisorctl restart <program_name>	# 重启单个子进程

supervisorctl start all			# 启动所有子进程
supervisorctl stop all			# 关闭所有子进程
supervisorctl restart all		# 重启所有子进程

supervisorctl tail -f <program_name>	# 输出supervisord最新日志(Ctrl+C退出)
supervisorctl maintail -f			# 输出supervisord最新日志(Ctrl+C退出)

```