supervisor简单使用

yum install -y epel-release
yum install -y supervisor

sudo apt install supervisor

pip3 install  supervisor
mkdir supervisor/{logs,run,supervisor.d} -p
echo_supervisord_conf > /etc/supervisord.conf

# cat /usr/lib/systemd/system/supervisord.service 
[Unit]
Description=Supervisor daemon

[Service]
Type=forking
ExecStart=/usr/local/bin/supervisord -c /etc/supervisord.conf
ExecStop=/usr/local/bin/supervisorctl $OPTIONS shutdown
ExecReload=/usr/local/bin/supervisorctl $OPTIONS reload
KillMode=process
Restart=on-failure
RestartSec=42s

[Install]
WantedBy=multi-user.target


配置无误后执行
systemctl daemon-reload
systemctl start supervisord

$ tree /etc/supervisor/
/etc/supervisor/
├── conf.d
└── supervisord.conf

[root@cicd /usr/local/supervisor]# egrep -v "^;|^$" supervisord.conf
[unix_http_server]
file=/usr/local/supervisor/run/supervisor.sock   ; the path to the socket file
[supervisord]
logfile=/var/log/supervisor/supervisord.log ; main log file; default $CWD/supervisord.log
logfile_maxbytes=50MB        ; max main logfile bytes b4 rotation; default 50MB
logfile_backups=10           ; # of main logfile backups; 0 means none, default 10
loglevel=info                ; log level; default info; others: debug,warn,trace
pidfile=/usr/local/supervisor/run/supervisord.pid ; supervisord pidfile; default supervisord.pid
nodaemon=false               ; start in foreground if true; default false
minfds=1024                  ; min. avail startup file descriptors; default 1024
minprocs=200                 ; min. avail process descriptors;default 200
[rpcinterface:supervisor]
supervisor.rpcinterface_factory = supervisor.rpcinterface:make_main_rpcinterface
[supervisorctl]
serverurl=unix:///usr/local/supervisor/run/supervisor.sock ; use a unix:// URL  for a unix socket
[include]
files = supervisor.d/*.conf

vim /etc/supervisord.conf
[include]
files = supervisord.d/*.conf

systemctl restart supervisord

command=nginx  ; 程序启动命令
autostart=true       ; 在supervisord启动的时候也自动启动
startsecs=10         ; 启动10秒后没有异常退出，就表示进程正常启动了，默认为1秒
autorestart=true     ; 程序退出后自动重启,可选值：[unexpected,true,false]，默认为unexpected，表示进程意外杀死后才重启
startretries=3       ; 启动失败自动重试次数，默认是3
user=nginx         ; 用哪个用户启动进程，默认是root
priority=999         ; 进程启动优先级，默认999，值小的优先启动
redirect_stderr=true ; 把stderr重定向到stdout，默认false
stdout_logfile_maxbytes=20MB  ; stdout 日志文件大小，默认50MB
stdout_logfile_backups = 20   ; stdout 日志文件备份数，默认是10
stdout_logfile=/var/log/supervisor_test/test.log    #当指定目录不存在时无法正常启动，所以需要手动创建目录（supervisord 会自动创建日志文件）
stopasgroup=false     ;默认为false,进程被杀死时，是否向这个进程组发送stop信号，包括子进程
killasgroup=false     ;默认为false，向进程组发送kill信号，包括子进程

cat /etc/supervisor/conf.d/nginx.conf
[program:nginx]
command=/usr/sbin/nginx    #这里会有问题吗？
autostart=true
startsecs=10
autorestart=true
startretries=3
user=root
priority=100
redirect_stderr=true
stdout_logfile_maxbytes=20MB
strout_logfile=/var/log/supervisor_test/nginx.log
stopasgroup=false
killasgroup=false

sudo systemctl restart supervisor.service
sudo systemctl enable supervisor.service    #加入到开机启动

$ sudo supervisorctl status
nginx                            FATAL     Exited too quickly (process log may have details)

# cat /etc/supervisor/conf.d/nginx.conf 
[program:nginx]
command=/usr/sbin/nginx -g 'daemon off;'
autostart=true
startsecs=10
autorestart=true
startretries=3
user=root
priority=100
redirect_stderr=true
stdout_logfile_maxbytes=20MB
strout_logfile=/var/log/supervisor_test/nginx.log
stopasgroup=false
killasgroup=false

killall nginx

supervisorctl 是 supervisord的命令行客户端工具
supervisorctl status：查看所有进程的状态
supervisorctl stop nginx：停止nginx
supervisorctl start nginx：启动nginx
supervisorctl restart nginx: 重启nginx
supervisorctl update ：配置文件修改后可以使用该命令加载新的配置
supervisorctl reload: 重新启动配置中的所有程序

启动：
supervisord -c supervisord.conf

关闭：
supervisorctl shutdown