Linux 檢查並重新啟動 Apache2

現在主機大多都用 Debian / Ubuntu Linux, 可能實驗性的東西裝太多, 常常不小心就玩掛了而沒注意到.

所以用 Python 寫隻 Script 來 檢查 / 判斷 Apache2 是否活著, 死掉的話, 要自動重新啟動.

Check and Restart Apache2 script

1. vim /usr/bin/monitor_apache2.py

   #!/usr/bin/python
   from os import system, path
   
   pid_file = '/var/run/apache2.pid'
   cmd = 'sudo /etc/init.d/apache2 restart'
   
   if not path.exists(pid_file):
       system(cmd)

2. chmod +x /usr/bin/monitor_apache2.py
3. crontab -e # 下述設定每 10分鐘檢查一次
   */10 * * * * /usr/bin/monitor_apache2.py

感謝 clifflu 指點, 另外寫這隻是用 service 檢查 Apache status 的狀態.

#!/usr/bin/python
import os
status = os.popen('/usr/sbin/service apache2 status').readlines()

# apache2: unrecognized service
# Apache2 is running (pid 24087).
running = False
if status.pop().find('running') > 0:
    running = True

if not running:
    system('sudo /usr/sbin/service apache2 restart')

下面這隻備用, 判斷 Apache2 的 Process 是否存在, 不存在就重新啟動 Apache2.

#!/usr/bin/python
import os
lines = os.popen('ps aux | grep apache | grep -v grep').readlines()

running = False
for len(lines) >= 0:
    running = True

#for line in lines:
#    proc_id = line.split()[1]

if not running:
    system('sudo /etc/init.d/apache2 restart')