crontab で httpd の再起動

Rocky9 の Apache で Trac を運用していると、何日かしてサイトが応答しなくなる(Timeout)現象に対処するため、crontab で Apache を再起動する

root の実行ファイルを作成

• root で webchk を作成し実行権を設定

[user1@tk2-234-26905 ~]$ sudo -s
[root@tk2-234-26905 user1]# cd /root/
[root@tk2-234-26905 ~]# vi webchk
[root@tk2-234-26905 ~]#              <<< Ctrl+D
exit
[user1@tk2-234-26905 ~]$ sudo ls -l /root/
合計 12
drwx------ 2 root root 4096  6月  9 17:30 mail
drwx------ 3 root root 4096 11月  3  2023 snap
-rw-r--r-- 1 root root  147  7月 23 16:56 webchk
[user1@tk2-234-26905 ~]$ sudo cat /root/webchk
# apache restart and backup
systemctl stop httpd
cd /var/www
rm -f /home/user0/www-tk2-234.tgz
tar czf /home/user0/www-tk2-234.tgz kho.jp khotrac.jp ma23.info
systemctl start httpd
[user1@tk2-234-26905 ~]$ sudo chmod +x /root/webchk
[user1@tk2-234-26905 ~]$ sudo ls -l /root/
合計 12
drwx------ 2 root root 4096  6月  9 17:30 mail
drwx------ 3 root root 4096 11月  3  2023 snap
-rwxr-xr-x 1 root root  147  7月 23 16:56 webchk
[user1@tk2-234-26905 ~]$

crontab の設定

• /etc/crontab に /root/webchk を実行するよう設定

[user1@tk2-234-26905 ~]$ sudo cat /etc/crontab
SHELL=/bin/bash
PATH=/sbin:/bin:/usr/sbin:/usr/bin
MAILTO=root

# For details see man 4 crontabs

# Example of job definition:
# .---------------- minute (0 - 59)
# |  .------------- hour (0 - 23)
# |  |  .---------- day of month (1 - 31)
# |  |  |  .------- month (1 - 12) OR jan,feb,mar,apr ...
# |  |  |  |  .---- day of week (0 - 6) (Sunday=0 or 7) OR sun,mon,tue,wed,thu,fri,sat
# |  |  |  |  |
# *  *  *  *  * user-name  command to be executed

[user1@tk2-234-26905 ~]$ sudoedit /etc/crontab
[user1@tk2-234-26905 ~]$ ll /etc/crontab
-rw-r--r--. 1 root root 479  7月 26 09:18 /etc/crontab
[user1@tk2-234-26905 ~]$ tail /etc/crontab

# Example of job definition:
# .---------------- minute (0 - 59)
# |  .------------- hour (0 - 23)
# |  |  .---------- day of month (1 - 31)
# |  |  |  .------- month (1 - 12) OR jan,feb,mar,apr ...
# |  |  |  |  .---- day of week (0 - 6) (Sunday=0 or 7) OR sun,mon,tue,wed,thu,fri,sat
# |  |  |  |  |
# *  *  *  *  * user-name  command to be executed
21 9 * * * root /root/webchk
[user1@tk2-234-26905 ~]$

• 上記の場合9時21分に webchk を実行

[user1@tk2-234-26905 ~]$ sudo systemctl status httpd
● httpd.service - The Apache HTTP Server
     Loaded: loaded (/usr/lib/systemd/system/httpd.service; enabled; preset: di>
    Drop-In: /usr/lib/systemd/system/httpd.service.d
             mqphp-fpm.conf
     Active: active (running) since Fri 2024-07-26 09:22:38 JST; 2min 5s ago
       Docs: man:httpd.service(8)
   Main PID: 189620 (httpd)
     Status: "Total requests: 11; Idle/Busy workers 100/0;Requests/sec: 0.0924;>
      Tasks: 230 (limit: 11132)
     Memory: 170.3M
        CPU: 3.121s
     CGroup: /system.slice/httpd.service
             tq189620 /usr/sbin/httpd -DFOREGROUND
             tq189621 /usr/sbin/httpd -DFOREGROUND
             tq189622 /usr/sbin/httpd -DFOREGROUND
             tq189623 /usr/sbin/httpd -DFOREGROUND
             tq189624 /usr/sbin/httpd -DFOREGROUND
             mq189800 /usr/sbin/httpd -DFOREGROUND

 7月 26 09:22:38 tk2-234-26905.vs.sakura.ne.jp systemd[1]: Starting The Apache >
 7月 26 09:22:38 tk2-234-26905.vs.sakura.ne.jp httpd[189620]: Server configured>
 7月 26 09:22:38 tk2-234-26905.vs.sakura.ne.jp systemd[1]: Started The Apache H>
[user1@tk2-234-26905 ~]$

• status を確認すると、2分5秒前に起動された

[user1@tk2-234-26905 ~]$ sudo ls -l ../user0/
合計 44172
-rw-r--r--  1 user0 user0    26344 11月  3  2023 Installed.pkg
drwx------  2 user0 user0     4096 11月  5  2023 httpd_log
drwx------  3 user0 user0     4096 11月  3  2023 snap
-rw-r--r--  1 root  root  45144062  7月 26 09:22 www-tk2-234.tgz
[user1@tk2-234-26905 ~]$

• backup のファイルも確認できる
• day of week も設定すれば、特定の曜日に実行できる