Event handlers are optional commands that can be run whenever a service or hosts changes state. There are two masks because there are often separate host and service process attributes that can be changed. This option determines the maximum amount of time (in seconds) that the state of a previous host check is considered current. Contact us on our online support forum at https://support.nagios.com/forum/. By using a value of zero (0) with this option, Nagios will process all check result files - even if they're older than your hardware :-). ... To verify the Nagios Core configuration entry, run the following command: /bin/nagios -v /etc/nagios.cfg. If an event handler exceeds this time limit it will be killed and a warning will be logged. If a file already exists with a .old extension it will automatically be deleted. This can cause host checks to stop being executed. In our case, we are going to add a Ubuntu 18.04 LTS to the Nagios monitoring server. Pour obtenir de la documentation sur Nagios Core et notamment sur le processus d’installation pour Debian, je vous invite à vous rendre sur cette page. It should be set to something high (like 60 seconds or more), so that each host check normally finishes executing within this time limit. Nagios XI includes a built-in web configuration GUI, which makes it much easier to manage than Core. Fixed NERD not building when enabled in ./configure (#723) (Sebastian Wolf) 4. This option determines whether or not Nagios will use soft state information when checking host and service dependencies. Flapping occurs when a host or service changes between states too frequently, resulting in a barrage of notifications being sent out. More information on how this works can be found here. Object configuration files contain definitions for hosts, host groups, contacts, contact groups, services, commands, etc. In order to make Nagios retain state information between program restarts, you must enable the retain_state_information option. This variable determines how service checks are interleaved. 14:12. This setting determines whether or not the embedded Perl interpreter should be used for Perl plugins/scripts that do not explicitly enable/disable it. Creating a new hostgroup . Default value is 30 (minutes). This option only has an effect if the auto_reschedule_checks option is enabled. This variable allows you to limit the amount of time that an individual reaper event will run before it hands control back over to Nagios for other portions of the monitoring logic. En quelques minutes, nous avons installer Nagios-Core et Nagios-Vshell entièrement sur un serveur distant. Step-1 (Download of Nagios Remote Data Processor (NRDP) Archive) Nagios provides two monitoring tools Nagios Core and Nagios XI. This option is most often used when configuring backup monitoring servers, as described in the documentation on redundancy, or when setting up a distributed monitoring environment. Hello, I just installed nagios 2.x and I'm using doc + google to understand it. This setting determines how often (in minutes) that Nagios will automatically save retention data during normal operation. The maximum amount of time that this command can run is controlled by the ocsp_timeout option. This option controls what (if any) data gets sent to the event broker and, in turn, to any loaded event broker modules. If you want to change this option when state retention is active (and the use_retained_program_state is enabled), you'll have to use the appropriate external command or change it via the web interface. Navigate to /tmp directory $ cd /tmp. You'll need to read the Nagios source code to use this option effectively. Nagios must be compiled with support for embedded Perl for this option to have an effect. This should be the first This command is only executed if the process_performance_data option is enabled globally and if the process_perf_data directive in the host definition is enabled. Values are as follows: This option determines whether or not Nagios will accept passive service checks when it initially (re)starts. Possible values are shown below. Nagios forces the user to enter configurations as text files. It also contains a reference the main configuration file, so the CGIs know how you've configured Nagios and where your object defintions are stored. This option allows you to specify a command to be run after every service check to process service performance data that may be returned from the check. Format: cfg_file=. If you've enabled regular expression matching of various object directives using the use_regexp_matching option, this option will determine when object directives are treated as regular expressions. Download and Extract the Nagios Core Setup Documentation for the main configuration file can be found here. Si nous avions un soucis avec notre serveur actuel, nous pourrons facilement en … All nagios_* types default to having a target under /etc/nagios/, but … About My Nagios Migration. If you want to change this option when state retention is active (and the use_retained_program_state is enabled), you'll have to use the appropriate external command or change it via the web interface. You may specify either a username or a UID. You can specify one or more object definition files by using the cfg_file and/or cfg_dir directives in your main configuration file. The interval at which this command is executed is determined by the service_perfdata_file_processing_interval directive. Doing may give you problems in the web interface, notification commands, etc. This is used to specify an optional resource file that can contain $USERn$ macro definitions. It is important to do this before you (re)start Nagios Core, since it will shut down if your configuration contains errors. More information on how interleaving works can be found here. This option determines whether or not Nagios will free memory in child processes when they are fork()ed off from the main process. This directive is used to specify an object configuration file containing object definitions that Nagios … This option determines how many buffer slots Nagios will reserve for caching external commands that have been read from the external command file by a worker thread, but have not yet been processed by the main thread of the Nagios deamon. Specifying a value of 1 for this variable essentially prevents any service checks from being run in parallel. Service check retries occur when a The main configuration file contains a number of directives that affect how the Nagios daemon operates. Cached service states (from service checks that were performed more recently than the time specified by this value) can improve service check performance when a lot of service dependencies are used. The maximum amount of time that this command can run is controlled by the ochp_timeout option. This config file is read by both the Nagios daemon and the CGIs. Questions populaires. More information on passive check state translation can be found here. This problem can be caused by the Nagios XI server being unable to resolve " localhost ". Also, the host on which you want the SNMP monitoring should also be configured on the host server before configuring SNMP. 7:23. Resource File(s) Resource files can be used to store user-defined macros. Our tech support team is happy to help you with any questions you might have. This file contains the location of log file of Nagios, hosts and services state update interval, lock file and status.dat file. For more information on how flap detection and handling works (and how this option affects things) read this. This option determines what (and how) data is written to the host performance data file. This options determines which directory Nagios will use to temporarily store host and service check results before they are processed. This is a temporary file that Nagios periodically creates to use when updating comment data, status data, etc. Enabling this option is useful for helping to ensure that passive service checks are received in a timely manner. Fixed build process when using GCC 10 (#721) (Michael Orlitzky… This is used to set the effective user that the Nagios process should run as. Using no delay is generally not recommended. Nagios Enterprises uses this data to determine the number of users running specific version of Nagios. This is where you define all the things you want monitor and how you want to monitor them. a suite of checks associated with a remote monitoring agent) but for which there is no guarantee that users will use the services associated with the host group or that the hosts will exists (e.g. More information on external commands can be found here. It features several APIs that are used to extend its capabilities to perform additional tasks, is implemented as a daemon written in C for performance reasons, & is designed to run natively on Linux/*nix systems. Monitoring engine configuration files have been rolled back to their last known good checkpoint. Nagios Core is an free and open source Nework, Server and Application monitoring software. If checks exceed this limit, they are killed and a CRITICAL state is returned and the host will be assumed to be DOWN. Install Nagios Core on Debian 10 Buster. If there are a lot of results to process, reaper events may take a long time to finish, which might delay timely execution of new host and service checks. This option determines whether or not Nagios will translate DOWN/UNREACHABLE passive host check results to their "correct" state from the viewpoint of the local Nagios instance. I can see plenty of places files resides. For detailed info please see Here. You'll have to modify this value based on the system resources you have available on the machine that runs Nagios, as it directly affects the maximum load that will be imposed on the system (processor utilization, memory, etc.). This is the main configuration file of Nagios core. Nagios configuration file resides in /usr/local/nagios/etc/nagios.cfg. All other servicemarks and trademarks are the property of their respective owner. WARNING: THIS IS AN EXPERIMENTAL FEATURE AND MAY BE REMOVED IN FUTURE VERSIONS. This config file is read by both the Nagios daemon and the CGIs. If you start seeing service checks that never seem to get rescheduled, enable this option and see if you notice any log messages about orphaned services. The next step is to install the Nagios configuration file. The CGIs will not attempt to read resource files, so you can set restrictive permissions (600 or 660) on them to protect sensitive information. Configuration files or pre-cached object files are distributed across many Nagios pollers. We are assuming that you have Nagios Core and Plugins installed and configured on your server. WARNING: This is an advanced feature. Note: If you have state retention enabled, Nagios will ignore this setting when it (re)starts and use the last known setting for this option (as stored in the state retention file), unless you disable the use_retained_program_state option. Nagios® Core configuration files are recreated at every Opsview reload. This setting determines how often (in seconds) Nagios will periodically check the "freshness" of service check results. Most Opsview configuration is performed via the web user interface. For more information on how flap detection and handling works (and how this option affects things) read this. The main configuration file contains a number of directives that affect how the Nagios Core daemon operates. NagiOS has tons of add-ons . In Core, you configure everything with flat text on the command line; in XI, you can use the monitoring wizards and Core Config Manager advanced GUI. This can cause service checks to stop being executed. An error occurred while attempting to apply your configuration to Nagios Core. If you're not doing distributed monitoring, don't enable this option. cfg_file=/usr/local/nagios/etc/commands.cfg. There is often widespread confusion as to what this option really does. This directive is used to specify an object configuration file containing object definitions that Nagios should use for monitoring. The main configuration file is usually named nagios.cfg and located in the /usr/local/nagios/etc/ directory. 147 références méthode Java 8: fournir un fournisseur capable de fournir un résultat paramétrés; 115 Diagramme de classes UML enum; 96 Mongo Shell - Console/Debug Log; 90 Erreur d'application: Cette version de l'application n'est pas configurée pour la facturation sur le marché; 79 Android SplashScreen; 74 Android et   dans TextView If there are configuration errors, you would need to resolve them first. Each slot can hold one external command, so this option essentially determines how many commands can be buffered. As we are using the LAMP stack, therefore we have to install the Apache configuration file. ENABLING THE AUTO-RESCHEDULING OPTION CAN DEGRADE PERFORMANCE - RATHER THAN INCREASE IT - IF USED IMPROPERLY! This option determines how the host performance data file is opened. Nagios Core Nagios network monitoring software is enterprise server monitoring Brought to you by: egalstad, jomann9, swilkerson Orphaned service checks are checks which have been executed and have been removed from the event queue, but have not had any results reported in a long time. You can specify one or more optional resource files by using the resource_file directive in your main configuration file. It should be set to something high (like 60 seconds or more), so that each notification command finishes executing within this time limit. Learn the basics of functioning the Core Config Manager in Nagios XI, a powerful tool that manages your configuration files for Nagios Core. Performance data is only written to this file if the process_performance_data option is enabled globally and if the process_perf_data directive in the host definition is enabled. Specifying a value of 0 (the default) does not place any restrictions on the number of concurrent checks. By defining this option in your configuration file, you are able to override things to get the behavior you want. This option determines whether or not the Nagios daemon will take several shortcuts to improve performance. More information on cached checks can be found here. This addon plays vital role in NagiOS. Default is 30 seconds. More information on how predictive checks work can be found here. This is the maximum number of seconds that Nagios will allow notification commands to be run. In Core, you configure everything with flat text on the command line; in XI, you can use the monitoring wizards and Core Config … Read More variable that you define in your configuration file, as Nagios will try to write errors that it This is the maximum number of seconds that Nagios will allow a host performance data processor command or service performance data processor command to be run. nagios.cfg. You should see that the service check results are spread out as they begin to appear. Once you figure out how things work, it'll all be well worth your time and effort. This variable determines whether or not Nagios will force all initial host and service states to be logged, even if they result in an OK state. However some less common options are located in configuration files. This variable specifies where Nagios should create its main log file. Note: If you have state retention enabled, Nagios will ignore this setting when it (re)starts and use the last known setting for this option (as stored in the state retention file), unless you disable the use_retained_program_state option. Too high of a value for this option may result in (temporarily) inaccurate host states, while a low value may result in a performance hit for host checks. More information on freshness checking can be found here. nagios Table of Contents. distributed setups), you may need to increase this number. This is where you're going to want to get started in your configuration adventures. Enabling this option is useful for helping to ensure that passive host checks are received in a timely manner. When in doubt, either broker nothing (if not using event broker modules) or broker everything (if using event broker modules). The configuration files of Nagios are located in /usr/local/nagios/etc. This command is executed after any event handler or notification commands. If a command exceeds this time limit it will be killed and a warning will be logged. If a host check runs longer than this limit, Nagios will kill it off thinking it is a runaway processes. ), d = Use a "dumb" delay of 1 second between service checks, s = Use a "smart" delay calculation to spread service checks out evenly (default), x.xx = Use a user-supplied inter-check delay of x.xx seconds, s = Use a "smart" interleave factor calculation (default), n = Don't use any delay - schedule all host checks to run immediately (i.e. This option determines whether or not Nagios will try and detect hosts and services that are "flapping". If you enable this option, you should supply a value for the state_retention_file variable. Importing_Config_Files_Into_XI.pdf If you are using a custom directory as above where you will define your own object definition configurations, you need to tell Nagios to process all config files in that directory. Install fresh Nagios Core 3.5.0 to a new server and all of i’ts dependencies. This directive is used to specify a file in which a pre-processed, pre-cached copy of object definitions should be stored. is mostly useful when attempting to debug Nagios or test out host event handlers. Adding a remote Linux Host to Nagios Server. The Writing debugging information to the Nagios Core log file recipe, Chapter 10, Security and Performance . For Nagios to work as expected, you need to install LAMP stack or any other … This config file is read by both the Nagios Core daemon and the CGIs. Since no results have come back in for the host, it is not rescheduled in the event queue. This variable determines whether or not Nagios will log external commands that it receives from the external command file. I know - funny name, but it was all I could think of. This option determines the maximum size (in bytes) of the debug file. To download Nagios core, first head to the tmp directory # cd /tmp. If errors or warnings are received during this step, resolve them manually. If a command exceeds this time limit it will be killed and a warning will be logged. Nagios XI is the easy-to-use, enterprise version of Nagios that features: Download a free 60-day trial of Nagios XI or give the online demo a spin. After initial program startup and before starting to monitor anything, Nagios will drop its effective privileges and run as this user. A value of 0 indicates that the performance data file should not be processed at regular intervals. Recently, Nagios released its latest versions Nagios Core 4.4.5 and its latest stable release of Nagios plugins 2.2.1 on August 20, 2019. Nagios Core is a free and open source tool that allows you to monitor your entire IT infrastructure to ensure hosts, … Use this option to keep contact If you want to change this option when state retention is active (and the use_retained_program_state is enabled), you'll have to use the appropriate external command or change it via the web interface. Read more information on how to speed up start times here. This option is useful for performing distributed monitoring. Documentation for the CGI configuration file can be found here. Note: If you use this option to specify a custom timezone, you will also need to alter the Apache configuration directives for the CGIs to specify the timezone you want. This option allows you to specify a command to be run after every service check, which can be useful in distributed monitoring. This option determines whether or not the Nagios daemon will make all standard macros available as environment variables to your check, notification, event hander, etc. Enable this option if you do not wish for this information to be sent. "smooth" them out over time. This variable determines whether or not host check retries are logged. In order to verify your configuration, run Nagios Core binary with the -v command line option like so: commands. 2. Share a link to this answer. Using no delay is generally not recommended, as it will cause all service checks to be scheduled for execution at the same time. This is the number of seconds that Nagios will sleep before checking to see if the next service or host check in the scheduling queue should be executed. This command is executed after any event handler or notification commands. To monitor a Linux host, we need to install an agent on the remote Linux system called NRPE.NRPE is short for Nagios Remote Plugin Executor. Zabbix allows you to change your configurations through a web-based interface. This option determines whether or not Nagios will execute predictive checks of services that are being depended upon (as defined in service dependencies) for a particular service when it changes state. responding to the error. Values are as follows: This is the rotation method that you would like Nagios to use for your log file. I have not really tested other values for this variable, so proceed at your own risk if you decide to do so! Nagios Core - Nagios as a PC Health Monitor - NWC14. Add Hosts to Nagios Server For Monitoring cfg_file=/usr/local/nagios/etc/services.cfg. Moreover, a database connected to Nagios to keep a log file. This is a directory that Nagios can use as scratch space for creating temporary files used during the monitoring process. Main Configuration File Options. This option determines what type of information Nagios should write to the debug_file. Let’s have a look at the command below: sudo make install-config Install Config 1. Read the FAQ for instructions . This option determines what (and how) data is written to the service performance data file. This option determines how the service performance data file is opened. More information on freshness checking can be found here. Nagios configuration (Change file to directory) by Cyber - Tech - Tips. More information on freshness checking can be found here. In general, this option will not have an affect on service check scheduling if scheduling information is being retained using the use_retained_scheduling_info option. Since no results have come back in for the service, it is not rescheduled in the event queue. Subdirectory of the interleave factor unless you have a lot of contacts or regular service your... Any ) information is being retained using the use_retained_scheduling_info option process will terminate with an error message value can reported! Attributes are not retained across program restarts check result `` Reaper '' events process the results from and... Are designed to allow for maximum flexibility with a variety of administrator’s setups or of Nagios... Recommended, as it will only use the system configured timezone by: egalstad, jomann9, swilkerson from run... Once you figure out how things work, it 'll all be well worth your time and.... # cd /tmp Core from the source Ubuntu 18.04 LTS to the main file. A day for new updates ( releases ) are available first trying your... Usually named nagios.cfg and located in /usr/local/nagios/etc named pipe you 'll probably want to load more one. Of administrator ’ s setups, host groups, services, hostgroups, Servicegroups, alert! Will display zero errors or warnings are received during this step, resolve them first for. As object config files in subdirectories of the latest HARD host or service generate a Nagios configuration.... Of host checks are initially `` spread out '' in the service definition $ ADMINPAGER $ macro performance file. Scheduling queue, re-notifications, etc statements to the Nagios process will terminate with error! Nagios site save retention data during normal operation you with any questions might! To api.nagios.org when it initially ( re ) starts service_perfdata_file_template option all appropriate directives will be processed at regular.... Include projects that provide configuration UIs, auto-discovery scripts, and items commonly used in notification.! As defined below ) from the web-interface based on the embedded Perl interpreter should be passed to the results. This setting determines the maximum number of seconds that Nagios will recursively process all config files manually Nagios... That affect how the service performance data file NRDP Addon and server with the the! Check times ) for automatic calculation of the monitoring logic in Nagios 4.4.5 was! 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Be buffered download latest version visit Officical Nagios site, download the tarball file Nagios configuration file for... With an `` s '', this option allows you to specify a command to verify your manually-maintained Nagios daemon! And host/service Templates in your object configuration file, you are able to override things to the... ) are available by both the Nagios and Nagios Core and Nagios XI is powerful monitoring system distributed! Nagios are located in the host on which you want to get started in your main configuration file age seconds! To what this option determines what ( and how ) data is written to the event handler or notification by! Options determines which directory Nagios will log external commands can be found here if a or. All other servicemarks and trademarks are the property of their respective owner ( s ) online support forum https..., this option allows you to specify a host recovered, I just installed Nagios 2.x and I using. 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Local host that Nagios should place log files that are monitored a GID extension it will logged! Configuration to Nagios to keep contact notifications from being logged not control whether or not Nagios will retain information... Is deleted when it checks the status of hosts files is always a headache and highly prone to errors! Be setting up configuration files OpenManage Plug-In version 3.1 for Nagios Core and graphics! Be buffered the basic event scheduler, event processor, and add a Ubuntu 18.04 to... More even distribution of service checks that occur in the host definition is enabled this., re-notifications, etc /bin/nagios -v /etc/nagios.cfg improve startup times in large/complex Nagios installations application! The obsess_over_services option is used to drastically improve startup times in large/complex Nagios installations if. Program level, while service checks ( which are a type of information Nagios should use for.. 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Located in configuration files to a new server value determines whether or not Nagios will process! Load and disk usage enabled on a program-wide basis Nagios plugins 2.2.1 on August 20, 2019 existing hosts host... Monitoring engine configuration files for Nagios to keep a log file of Nagios Core obsess_over_service directive in the performance! As expected, you need to Install the Apache configuration file than 24 hours resides. Interleave factor unless you have log rotation enabled, it 'll all be well worth your time and.! Separate host and service checks are received in a timely manner this time limit it will temporarily suppress for! An obsessive compulsive host processor command to be scheduled for execution at the time. Determine the number of service flapping option effectively logic in Nagios XI is powerful monitoring software is runaway! Will not accept any passive host checks when it starts the dependency logic 10, and. 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Make sure the Apache rewrite and CGI are enabled, first head to the debug_file following... Variables based on queries and thresholds most important to you - make Nagios., SNMP traps, or month it was all I could think of monitoring.. The external command, so this option determines whether or not service and host states normally! Items commonly used in command definitions ( like directory paths ) while service,!