Executando (e monitorando) nginx com supervisord

Question

Começarei com meu caso de uso, pois talvez eu não esteja usando as ferramentas corretas para esse trabalho. Por favor, deixe-me saber se eu estou indo sobre isso todo o caminho errado

caso de uso: Eu tenho um servidor CentOS que hospeda vários aplicativos da web. Eu quero ser capaz de confiar que meu servidor web e servidor de aplicativos estarão em execução. Minha pilha parece

• servidor da web: nginx
• servidor de aplicativos: uWSGI
• estrutura da web: flask / python

Eu quero usar o supervisord para monitorar o nginx e o uWSGI. No meu /etc/supervisor.conf, eu tenho

[program:nginxgo]
command = /usr/sbin/nginx
autostart=true
autorestart=unexpected
exitcodes=0
stdout_logfile=/home/webdev/nginxgo.log
stderr_logfile=/home/webdev/nginxgoerr.log

[program:uwsgi_emperor_go]
command = uwsgi --emperor /etc/uwsgi/emperor.ini
autostart=true
autorestart=unexpected
stopsignal=INT
stdout_logfile=/home/webdev/emp.log
stderr_logfile=/home/webdev/emperr.log
directory=/home/webdev/
user=webdev

Eu tenho o processo uWSGI para começar. Quando eu digito [root@mymachine]# /usr/local/bin/supervisord -n -c /etc/supervisord.conf

a saída é

2014-11-26 14:07:56,917 CRIT Supervisor running as root (no user in config file)
2014-11-26 14:07:56,951 CRIT Server 'inet_http_server' running without any HTTP authentication checking
2014-11-26 14:07:56,952 INFO supervisord started with pid 31068
2014-11-26 14:07:57,957 INFO spawned: 'nginxgo' with pid 31071
2014-11-26 14:07:57,970 INFO spawned: 'uwsgi_emperor_go' with pid 31072
2014-11-26 14:07:59,095 INFO success: nginxgo entered RUNNING state, process has stayed up for > than 1 seconds (startsecs)
2014-11-26 14:07:59,095 INFO success: uwsgi_emperor_go entered RUNNING state, process has stayed up for > than 1 seconds (startsecs)
2014-11-26 14:08:00,601 INFO exited: nginxgo (exit status 1; not expected)
2014-11-26 14:08:01,607 INFO spawned: 'nginxgo' with pid 31079
2014-11-26 14:08:02,684 INFO success: nginxgo entered RUNNING state, process has stayed up for > than 1 seconds (startsecs)
2014-11-26 14:08:04,189 INFO exited: nginxgo (exit status 1; not expected)
2014-11-26 14:08:05,194 INFO spawned: 'nginxgo' with pid 31080
2014-11-26 14:08:06,264 INFO success: nginxgo entered RUNNING state, process has stayed up for > than 1 seconds (startsecs)
2014-11-26 14:08:07,771 INFO exited: nginxgo (exit status 1; not expected)
2014-11-26 14:08:08,775 INFO spawned: 'nginxgo' with pid 31081
2014-11-26 14:08:09,808 INFO success: nginxgo entered RUNNING state, process has stayed up for > than 1 seconds (startsecs)
2014-11-26 14:08:11,314 INFO exited: nginxgo (exit status 1; not expected)
2014-11-26 14:08:12,319 INFO spawned: 'nginxgo' with pid 31082
2014-11-26 14:08:13,381 INFO success: nginxgo entered RUNNING state, process has stayed up for > than 1 seconds (startsecs)
2014-11-26 14:08:14,886 INFO exited: nginxgo (exit status 1; not expected)
^C2014-11-26 14:08:15,601 INFO spawned: 'nginxgo' with pid 31083
2014-11-26 14:08:15,603 WARN received SIGINT indicating exit request
2014-11-26 14:08:15,611 INFO waiting for nginxgo, uwsgi_emperor_go to die
2014-11-26 14:08:16,738 INFO success: nginxgo entered RUNNING state, process has stayed up for > than 1 seconds (startsecs)
2014-11-26 14:08:18,242 INFO exited: nginxgo (exit status 1; not expected)
2014-11-26 14:08:19,244 INFO waiting for uwsgi_emperor_go to die
2014-11-26 14:08:21,607 INFO stopped: uwsgi_emperor_go (exit status 0)

Veja como se diz

2014-11-26 14:07:59,095 INFO success: nginxgo entered RUNNING state, process has stayed up for > than 1 seconds (startsecs)
2014-11-26 14:07:59,095 INFO success: uwsgi_emperor_go entered RUNNING state, process has stayed up for > than 1 seconds (startsecs)

mas, em seguida, ele inicia apenas o processo de nginxgo. Eu mato a instância do supervisord com CTRL-C , e vejo em htop que os nginx master process e worker process estão ativos.

Tudo que eu quero é iniciar nginx e meu uWSGI emperor na inicialização do servidor / reinicialização ou falha de qualquer programa

    

Answer 1

O supervisord só pode manipular processos em primeiro plano. O padrão para nginx está sendo executado em segundo plano como daemon.

Para garantir que o seu nginx esteja rodando com o supervisord, você precisa configurar o 'daemon off' em seu nginx.conf (veja também nginx docu em link ).