Changes between Initial Version and Version 1 of CroTab

Timestamp:

Oct 12, 2024, 3:15:41 PM (2 months ago)

Author:

katta

Comment:

--

CroTab

@@ +1 @@
+[[PageOutline]]
+
+==　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