CentOS 7 httpdの起動と停止

CentOS 6系まではプロセスの起動は init スクリプト (/etc/init.d/) を利用していましたが、
CentOS 7系では systemctl コマンドを利用する方針に変更されています。また、chkconfig 
コマンドも廃止され、systemctl コマンドに統合されました。このあたりの手順をhttpdを例として
確認します。

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■httpd起動(&起動確認)

[root@centos70 ~]# systemctl start httpd.service
[root@centos70 ~]# systemctl status httpd.service
httpd.service - The Apache HTTP Server
   Loaded: loaded (/usr/lib/systemd/system/httpd.service; disabled)
   Active: active (running) since Sat 2014-07-25 15:33:43 JST; 5s ago
 Main PID: 2750 (httpd)
   Status: "Processing requests..."
   CGroup: /system.slice/httpd.service
           |-2750 /usr/sbin/httpd -DFOREGROUND
           |-2751 /usr/sbin/httpd -DFOREGROUND
           |-2752 /usr/sbin/httpd -DFOREGROUND
           |-2753 /usr/sbin/httpd -DFOREGROUND
           |-2754 /usr/sbin/httpd -DFOREGROUND
           `-2755 /usr/sbin/httpd -DFOREGROUND

Jul 25 15:33:43 centos70 systemd[1]: Starting The Apache HTTP Server...
Jul 25 15:33:43 centos70 httpd[2750]: AH00558: httpd: Could not reliably determine the server's fully qualified...essage
Jul 25 15:33:43 centos70 systemd[1]: Started The Apache HTTP Server.
Hint: Some lines were ellipsized, use -l to show in full.
[root@centos70 ~]#

## ブラウザでの確認
※事前にFireWallサービスを停止しておく

[root@centos70 ~]# systemctl stop firewalld.service

■httpd停止(&停止確認)

[root@centos70 ~]# systemctl stop httpd.service
[root@centos70 ~]# systemctl status httpd.service
httpd.service - The Apache HTTP Server
   Loaded: loaded (/usr/lib/systemd/system/httpd.service; disabled)
   Active: inactive (dead)

Jul 25 15:32:17 centos70 systemd[1]: Starting The Apache HTTP Server...
Jul 25 15:32:18 centos70 httpd[2713]: AH00558: httpd: Could not reliably determine the server's fully qualified...essage
Jul 25 15:32:18 centos70 systemd[1]: Started The Apache HTTP Server.
Jul 25 15:33:08 centos70 systemd[1]: Stopping The Apache HTTP Server...
(以下略)

■httpd自動起動設定(&設定確認)

[root@centos70 ~]# systemctl enable httpd.service
ln -s '/usr/lib/systemd/system/httpd.service' '/etc/systemd/system/multi-user.target.wants/httpd.service'
[root@centos70 ~]# systemctl list-unit-files | grep httpd
httpd.service                               enabled
[root@centos70 ~]#

■httpd自動起動解除(&設定確認)

[root@centos70 ~]# systemctl disable httpd.service
rm '/etc/systemd/system/multi-user.target.wants/httpd.service'
[root@centos70 ~]# systemctl list-unit-files | grep httpd
httpd.service                               disabled
[root@centos70 ~]#

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