如何监控Linux服务的正常运行时间和停机时间

Question

如何监控 linux 服务的运行时间和停机时间。

我使用 chkconfig (RHEL 6.3) 为我的应用程序创建了一个服务。我想监视服务何时启动和停止。

我可以通过在提供时写入日志文件来监视服务，service test start/stop但是如果它崩溃或异常终止，这不会捕获我的应用程序。

Answer 1

如果你想监控不同服务器上的许多应用程序，那么去 NagiOS，如果你想监控特定的应用程序、文件所有权，那么就去 Monit。

您可以使用监控

监视在本地主机上运行的守护进程或类似程序。Monit 对于监视守护进程特别有用，例如在系统启动时从 /etc/init.d/ 启动的进程。例如sendmail、sshd、apache 和mysql。

与许多监控系统不同的是，如果发生错误情况，Monit 可以采取行动，例如；如果sendmail 没有运行，Monit 可以自动再次启动sendmail 或者如果apache 使用了太多资源（例如，如果正在进行DoS 攻击）Monit 可以停止或重新启动apache 并向您发送警报消息。Monit 还可以监控过程特性，例如；进程使用了​​多少内存或 CPU 周期

更新::配置部分

Monit 最容易通过 aptitude 或 apt-get 安装

sudo aptitude install monit 

monit 下载后，您可以将程序和进程添加到配置文件中

vim /etc/monit/monitrc

set daemon 3                    # check services at 3-second intervals
set logfile /var/log/monit.log  # you can see what monit is doing
set alert sysadm@foo.bar        # receive all alerts
include /etc/monit.d/*          # add monit script path

然后为您的应用程序创建 monit 脚本，只需查看以下脚本示例：

您只需要/etc/monit.d/像这样创建 monit 脚本，/etc/monit.d/httpd.monit然后重新加载 monit 服务并检查 monit 日志tail -f /var/log/monit.log

对于阿帕奇

check process apache with pidfile /usr/local/apache/logs/httpd.pid
   start program = "/etc/init.d/httpd start" with timeout 60 seconds
   stop program  = "/etc/init.d/httpd stop" 
   if cpu > 60% for 2 cycles then alert
   if cpu > 80% for 5 cycles then restart
   if totalmem > 200.0 MB for 5 cycles then restart
   if children > 250 then restart
   if loadavg(5min) greater than 10 for 8 cycles then stop
   if failed host www.tildeslash.com port 80 protocol http
      and request "/monit/doc/next.php"
      then restart
   if failed port 443 type tcpssl protocol http
      with timeout 15 seconds
      then restart
   if 3 restarts within 5 cycles then timeout
   depends on apache_bin
   group server

对于 Safesquid 代理

# Check if the safesquid process is running by monitoring the PID recorded in /opt/safesquid/safesquid/run/safesquid.pid
check process safesquid with pidfile /opt/safesquid/safesquid/run/safesquid.pid
group root
start program = "/etc/init.d/safesquid start"
stop program = "/etc/init.d/safesquid stop"
mode active
# If safesquid process is active it must be updating the performance log at
# /opt/safesquid/safesquid/logs/performance/performance.log every 2 seconds.
# If the file is more than 3 seconds old we definitely have a problem

check file "safesquid-PERFORMANCELOG" with path /opt/safesquid/safesquid/logs/performance/performance.log
  if timestamp > 3 SECOND then alert