Estou tendo problemas para fazer com que um arquivo de unidade de serviço do systemd seja executado corretamente quando o servidor for reinicializado. Este servidor é uma nova instalação do CentOS 7.0.1406. Estou tentando configurá-lo com várias instâncias do Apache httpd. Em uma instalação mais antiga do CentOS, as instâncias do httpd estavam funcionando bem e agora estou tentando portar essas configurações para o novo CentOS que usa o systemd.
Posso ativar o serviço, iniciá-lo, reiniciá-lo e interrompê-lo sem problemas. Quando eu reinicio, aparece "Nenhum arquivo ou diretório". Se eu reativar o serviço, tudo funcionará novamente até a próxima reinicialização.
Arquivo de serviço:
[Unit]
Description=Apache web server instance apache01
After=network.target remote-fs.target nss-lookup.target
[Service]
Type=forking
PIDFile=/data/apacheinstances/apache01/logs/httpd.pid
ExecStart=/data/apacheinstances/apache01/bin/apachectl start
ExecStop=/data/apacheinstances/apache01/bin/apachectl stop
ExecReload=/data/apacheinstances/apache01/bin/apachectl reload
PrivateTmp=true
LimitNOFILE=infinity
[Install]
WantedBy=multi-user.target
Como eu habilitei:
$ sudo systemctl enable /data/apacheinstances/apache01/bin/apache01.service
ln -s '/data/apacheinstances/apache01/bin/apache01.service' '/etc/systemd/system/multi-user.target.wants/apache01.service'
ln -s '/data/apacheinstances/apache01/bin/apache01.service' '/etc/systemd/system/apache01.service'
$ sudo systemctl status apache01
apache01.service - Apache web server instance apache01
Loaded: loaded (/data/apacheinstances/apache01/bin/apache01.service; enabled)
Active: inactive (dead)
Como comecei:
$ sudo systemctl start apache01
$ sudo systemctl status apache01
apache01.service - Apache web server instance apache01
Loaded: loaded (/data/apacheinstances/apache01/bin/apache01.service; enabled)
Active: active (running) since Wed 2014-10-08 14:37:56 PDT; 13s ago
Process: 1740 ExecStart=/data/apacheinstances/apache01/bin/apachectl start (code=exited, status=0/SUCCESS)
Main PID: 1746 (httpd)
CGroup: /system.slice/apache01.service
+-1746 /usr/local/httpd-2.4.10-apache01/bin/httpd -f /data/apacheinstances/apache01/conf/httpd.conf -k start
+-1747 /usr/local/sbin/cronolog /data/apacheinstances/apache01/logs/error_log-%Y%m
+-1748 /usr/local/sbin/cronolog /data/apacheinstances/apache01/logs/access_log-%Y%m
+-1749 /usr/local/httpd-2.4.10-apache01/bin/httpd -f /data/apacheinstances/apache01/conf/httpd.conf -k start
+-1750 /usr/local/httpd-2.4.10-apache01/bin/httpd -f /data/apacheinstances/apache01/conf/httpd.conf -k start
+-1751 /usr/local/httpd-2.4.10-apache01/bin/httpd -f /data/apacheinstances/apache01/conf/httpd.conf -k start
Oct 08 14:37:56 server105 apachectl[1740]: Starting apache01: [ OK ]
Oct 08 14:37:56 server105 systemd[1]: PID file /data/apacheinstances/apache01/logs/httpd.pid not readable (yet?) after start.
Oct 08 14:37:56 server105 systemd[1]: Started Apache web server instance apache01.
Como eu reiniciei:
$ sudo systemctl restart apache01
$ sudo systemctl status apache01
apache01.service - Apache web server instance apache01
Loaded: loaded (/data/apacheinstances/apache01/bin/apache01.service; enabled)
Active: active (running) since Wed 2014-10-08 14:38:40 PDT; 12s ago
Process: 1836 ExecStop=/data/apacheinstances/apache01/bin/apachectl stop (code=exited, status=0/SUCCESS)
Process: 1844 ExecStart=/data/apacheinstances/apache01/bin/apachectl start (code=exited, status=0/SUCCESS)
Main PID: 1850 (httpd)
CGroup: /system.slice/apache01.service
+-1850 /usr/local/httpd-2.4.10-apache01/bin/httpd -f /data/apacheinstances/apache01/conf/httpd.conf -k start
+-1851 /usr/local/sbin/cronolog /data/apacheinstances/apache01/logs/error_log-%Y%m
+-1852 /usr/local/sbin/cronolog /data/apacheinstances/apache01/logs/access_log-%Y%m
+-1853 /usr/local/httpd-2.4.10-apache01/bin/httpd -f /data/apacheinstances/apache01/conf/httpd.conf -k start
+-1855 /usr/local/httpd-2.4.10-apache01/bin/httpd -f /data/apacheinstances/apache01/conf/httpd.conf -k start
+-1856 /usr/local/httpd-2.4.10-apache01/bin/httpd -f /data/apacheinstances/apache01/conf/httpd.conf -k start
Oct 08 14:38:40 server105 apachectl[1844]: Starting apache01: [ OK ]
Oct 08 14:38:40 server105 systemd[1]: PID file /data/apacheinstances/apache01/logs/httpd.pid not readable (yet?) after start.
Oct 08 14:38:40 server105 systemd[1]: Started Apache web server instance apache01.
Como parei:
$ sudo systemctl stop apache01
$ sudo systemctl status apache01
apache01.service - Apache web server instance apache01
Loaded: loaded (/data/apacheinstances/apache01/bin/apache01.service; enabled)
Active: inactive (dead) since Wed 2014-10-08 14:39:44 PDT; 12s ago
Process: 1940 ExecStop=/data/apacheinstances/apache01/bin/apachectl stop (code=exited, status=0/SUCCESS)
Process: 1844 ExecStart=/data/apacheinstances/apache01/bin/apachectl start (code=exited, status=0/SUCCESS)
Main PID: 1850 (code=exited, status=0/SUCCESS)
Oct 08 14:38:40 server105 apachectl[1844]: Starting apache01: [ OK ]
Oct 08 14:38:40 server105 systemd[1]: PID file /data/apacheinstances/apache01/logs/httpd.pid not readable (yet?) after start.
Oct 08 14:38:40 server105 systemd[1]: Started Apache web server instance apache01.
Oct 08 14:39:44 server105 systemd[1]: Stopping Apache web server instance apache01...
Oct 08 14:39:44 server105 apachectl[1940]: Stopping apache01: [ OK ]
Oct 08 14:39:44 server105 systemd[1]: Stopped Apache web server instance apache01.
Status após reinicialização:
$ sudo systemctl status apache01
apache01.service
Loaded: not-found (Reason: No such file or directory)
Active: inactive (dead)
Oct 08 14:44:58 server105 systemd[1]: Cannot add dependency job for unit apache01.service, ignoring: Unit apache01.service failed to load: No such file or directory.
Como eu reativo e inicio:
$ sudo systemctl reenable /data/apacheinstances/apache01/bin/apache01.service
rm '/etc/systemd/system/apache01.service'
rm '/etc/systemd/system/multi-user.target.wants/apache01.service'
ln -s '/data/apacheinstances/apache01/bin/apache01.service' '/etc/systemd/system/multi-user.target.wants/apache01.service'
ln -s '/data/apacheinstances/apache01/bin/apache01.service' '/etc/systemd/system/apache01.service'
$ sudo systemctl start apache01
$ sudo systemctl status apache01
apache01.service - Apache web server instance apache01
Loaded: loaded (/data/apacheinstances/apache01/bin/apache01.service; enabled)
Active: active (running) since Wed 2014-10-08 14:52:20 PDT; 5s ago
Process: 1737 ExecStart=/data/apacheinstances/apache01/bin/apachectl start (code=exited, status=0/SUCCESS)
Main PID: 1743 (httpd)
CGroup: /system.slice/apache01.service
+-1743 /usr/local/httpd-2.4.10-apache01/bin/httpd -f /data/apacheinstances/apache01/conf/httpd.conf -k start
+-1744 /usr/local/sbin/cronolog /data/apacheinstances/apache01/logs/error_log-%Y%m
+-1745 /usr/local/sbin/cronolog /data/apacheinstances/apache01/logs/access_log-%Y%m
+-1746 /usr/local/httpd-2.4.10-apache01/bin/httpd -f /data/apacheinstances/apache01/conf/httpd.conf -k start
+-1747 /usr/local/httpd-2.4.10-apache01/bin/httpd -f /data/apacheinstances/apache01/conf/httpd.conf -k start
+-1748 /usr/local/httpd-2.4.10-apache01/bin/httpd -f /data/apacheinstances/apache01/conf/httpd.conf -k start
Oct 08 14:52:20 server105 apachectl[1737]: Starting apache01: [ OK ]
Oct 08 14:52:20 server105 systemd[1]: PID file /data/apacheinstances/apache01/logs/httpd.pid not readable (yet?) after start.
Oct 08 14:52:20 server105 systemd[1]: Started Apache web server instance apache01.
Não sei por que funciona sem problemas antes da reinicialização, mas falha depois. Se eu não fizer a reativação, continuo recebendo o mesmo erro sobre "Esse arquivo ou diretório não existe".
Tentei pesquisar a funcionalidade de registro no systemd para determinar qual arquivo ou diretório ele não consegue encontrar, mas não consegui encontrar.
Alguém já experimentou esse tipo de comportamento antes?
Responder1
Todos os serviços precisam ser carregados e analisados antes de iniciá-los, e seu serviço não está disponível no início do processo de inicialização quando o systemd analisa todos os serviços, pois está em uma partição diferente.
Para resolver isso mantenha os serviços locais /etc/systemd/system/ou faça um pacote para sua distribuição e coloque-os em/usr/lib/systemd/system/