Nagios Installation
- Nagios is offered as
- Nagios Core (Free)
- Nagios Enterprise (Paid)
- For Nagios Core installation Official Docs and Direct DevOps
- If we follow the standard installation as mentioned in above links the following folder structure and files are very essential
Configuring Nagios
- Main nagios configuration file is nagios.cfg, when we start nagios this is the file that gets loaded.
- Refer Here for official docs
- Configuration Options
- log_file: Specifies the logfile to use
- cfg_file: Specifies the configuration file to read for object definitions.
- cfg_dir: Specifies the configuration directory where all the files in it should be read for object definitions
- resource_file: File that stores macro definitions
- temp_file: Path to a temporary file to store temporary data
- lock_file: Path to a file used for synchronization
- status_file: Path to a file that stores the current status of all hosts and services.
- status_update_interval: Specifies how often in seconds the status file should be updated
- nagios_user: user to run the nagios daemon
- nagios_group: Group to run the nagios daemon
- command_file: It specifies path to external commandline that is used by other process to control the Nagios daemon
- service_check_timeout: After how many seconds should service check can be assumed to failed. default is 60 seconds
- host_check_timeout: After how many seconds should host check can be assumed to failed. default is 30 seconds
- interval_length: specifies the number of seconds for unit interval. It is not recommended to change this option.
Exercise:
- Install nagios core on ubuntu 18 and centos 7 machines
