HOW-TO: 如何监控整个集群的状态

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A Peek Into Some Cloud Monitoring Tools

• http://www.opensourceforu.com/2013/12/peek-cloud-monitoring-tools/

• Ganglia and Nagios, Monitor enterprise clusters with Ganglia

  http://www.ibm.com/developerworks/library/l-ganglia-nagios-1/

  http://www.ibm.com/developerworks/linux/library/l-ganglia-nagios-2/index.html

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• Linux Cluster Manager http://linuxcm.sourceforge.net/

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• CPU资源空闲就建立Web服务器
• I/O资源空闲就建立数据库服务器
• 内存资源空闲就建立缓存服务器

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• monit

  https://mmonit.com/monit/documentation/monit.html

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Nagios

• make folder to hold source packages: nagios-4.0.8.tar.gz, nagios-plugins-2.0.3.tar.gz mkdir /path/to/nagios4 cd /path/to/nagios4 tar –xzf /path/to/nagios-4.0.8.tar.gz tar –xzf /path/to/nagios-plugins-2.0.3.tar.gz
• create the groups and users groupadd nagios groupadd nagioscmd useradd -g nagios -G nagioscmd -d /opt/nagios nagios usermod -G nagioscmd www-data

• Compiling and installing Nagios mkdir -p /opt/nagios /etc/nagios /var/nagios chown nagios:nagios /opt/nagios /etc/nagios /var/nagios

  cd /path/to/nagios-4.0.8 sh configure \ --prefix=/opt/nagios \ --sysconfdir=/etc/nagios \ --localstatedir=/var/nagios \ --libexecdir=/opt/nagios/plugins \
  --with-command-group=nagioscmd

  make all cd ./base && make apt-cache search ssl | grep -- -dev cd .. make install make install-commandmode make install-config

• Compiling and installing Nagios plugins sh configure \ --prefix=/opt/nagios \ --sysconfdir=/etc/nagios \ --localstatedir=/var/nagios \ --libexecdir=/opt/nagios/plugins

  make all make install

• run it as a nagios user sudo su -c '/opt/nagios/bin/nagios /etc/nagios/nagios.cfg' nagios

• Setting up Nagios as a system service make install-init

  sudo /etc/init.d/nagios start / stop / restart

• set up a system to stop and start this service automatically update-rc.d nagios defaults
• make sure that Nagios is running ps -ef | grep ^nagios

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Configuring Nagios

• Creating/updating the main configuration file sudo vi /etc/nagios/nagios.cfg
• remove all the cfg_file and cfg_dir entries, and add the following ones: cfg_dir=/etc/nagios/commands cfg_dir=/etc/nagios/timeperiods cfg_dir=/etc/nagios/contacts cfg_dir=/etc/nagios/contactgroups cfg_dir=/etc/nagios/hosts cfg_dir=/etc/nagios/hostgroups cfg_dir=/etc/nagios/services cfg_dir=/etc/nagios/servicegroups
• create directories cd /etc/nagios sudo mkdir commands timeperiods contacts contactgroups hosts hostgroups services servicegroups
• In order to use default Nagios plugins sudo cp /etc/nagios/objects/commands.cfg /etc/nagios/commands/default.cfg
• make sure that the following options are set as follows in your nagios.cfg file check_external_commands=1 interval_length=60 accept_passive_service_checks=1 accept_passive_host_checks=1