进程管理工具 Supervisor 的使用

简介

supervisor是用Python开发的一个client/server服务,是Linux/Unix系统下的一个进程管理工具

用途

在使用swoole时，php server.php开启一个http服务并监听9501端口，即使使用nohup php server.php将其挂到后台运行，该进程可能会挂掉，而使用supervisor可以实现对该进程的监控，实现自动重启等功能，守护进程。

<?php
$http = new swoole_http_server("127.0.0.1", 9501);
$http->set(['work_num' => 2,'reactor_num' => 2]);
$http->on("start", function ($server) {
    echo "Swoole http server is started at http://127.0.0.1:9501\n";
});

$http->on("request", function ($request, $response) {
    var_dump($request);
    $response->header("Content-Type", "text/plain");
    $response->end("Hello World\n");
});

$http->start();

安装使用

1. 首先安装python的包管理工具pip，不再累述
2. pip3 install supervisor
3. 在本地自定义目录中执行 echo_supervisord_conf > supervisord.conf 复制一个配置文件
4. 修改supervisord.conf

[inet_http_server]         ; http地址
port=127.0.0.1:9019        ; ip_address:port specifier, *:port for all iface
username=user              ; default is no username (open server)
password=123               ; default is no password (open server)

[include]
files = /usr/local/etc/supervisor.d/*.ini ;本地子进程的配置目录

详细配置见：http://www.supervisord.org/co...

1. 在/usr/local/etc/supervisor.d/目录执行

vim swoole.ini

[program:swoole] ;定义进程名称
command=php /Users/jiao/ProjectPhp/test/jiao/server.php ；执行脚本命令
redirect_stderr=false  
autostart=true ；启动superviosr就启动该服务
autorestart=true ；进程挂了就自动重启
stderr_logfile=/tmp/swoole_stderr.log ；errorlog输出文件
stdout_logfile=/tmp/swoole_stdout.log ；log输出文件

1. 启动supervisor

supervisord -c /usr/local/etc/supervisord.conf

1. 查看服务状态

supervisorctl status
显示
swoole RUNNING pid 28495, uptime 0:19:43

可以看到swoole服务已经启动

➜  lsof -i:9501
COMMAND   PID USER   FD   TYPE             DEVICE SIZE/OFF NODE NAME
php     28495 jiao    4u  IPv4 0x44e3475dab74e94d      0t0  TCP localhost:9501 (LISTEN)

通过kill命令结束swoole进程，发现也会自动重启

➜  kill -s TERM 28706     
➜  lsof -i:9501      
COMMAND   PID USER   FD   TYPE             DEVICE SIZE/OFF NODE NAME
php     28825 jiao    4u  IPv4 0x44e3475d86909315      0t0  TCP localhost:9501 (LISTEN)

也可通过http://127.0.0.1:9019/查看

附supervisor常用命令

-c --configuration FILENAME -- configuration file path (searches if not given)
-h --help -- print usage message and exit
-i --interactive -- start an interactive shell after executing commands
-s --serverurl URL -- URL on which supervisord server is listening (default "http://localhost:9001").
-u --username USERNAME -- username to use for authentication with server
-p --password PASSWORD -- password to use for authentication with server
-r --history-file -- keep a readline history (if readline is available)
action [arguments] -- see below
Actions are commands like "tail" or "stop". If -i is specified or no action is
specified on the command line, a "shell" interpreting actions typed
interactively is started. Use the action "help" to find out about available
actions.
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