Sometimes I find it tricky figuring out exactly what a plugin is doing. Depending on the status received on hosts and services, appropriate action is taken. The method for using any of these "plugins" from the command line is the same as any other Linux script: Just run "./plugin-name" with the appropriate flags you want to check, and voila! The following settings are done for all MySQL servers. In most cases you'll use Nagios to monitor your hosts and services using regularly scheduled active checks. This usually calls for some effort. Nagios allows applications and event handlers to send out passive check results for host objects. The following illustration shows how results from active and passive checks are treated differently by Nagios: In both the cases, a check result stating that the host is down is received by Nagios. I test the command from command line successfull, but when I insert in configuration file (cfg) it gives Error: Service check command check_http -H MYIP -u http://MYIP/test.php specified in service HTTP for host Server01 not defined anywhere! 03-16-2010, 10:31 AM . It also defines Nagios user and group under which Nagios instance is running. Now let us add check_interval directive. The check logic inside Nagios process starts the Active check. To check whether a specific webpage is available, use the -u option as shown below. The figure shown below shows a passive check . Giving material.angular.io a refresh from Angular Blog Medium. Like every Nagios plugin, you will want to check from the command line before adding it to the configuration files. 1 check_http -p 8083 - user4556274 Jul 29, 2016 at 12:49 Add a comment 3 Answers Sorted by: 3 You can specify the port number directly in the command but you will must create one command per tested port. Test Server 1: custom application (TCP Port. These plugin states directly translate to service states. Nagios server in this example is hosted on 192.168..150 and an example client is hosted on IP 192.168..200 Exit Codes To identify the status of a monitored service, Nagios runs a check nagios.cfg. Go to the /usr/local/nagios/libexec dir (assuming you have installed nagios from source, if you have used a package from your distribution, check the docs of your package): $ cd /usr/local/nagios/libexec execute the check_dns plugin with the --help switch. I Have problem with the check_http when I try ur command test , I have the next message : They are a web interface and command line tool set to work with Nagios config that have decent default templates and "example" files that you can leverage for common checks. Passive checks are performed by external processes and the results are given back to Nagios for processing. Browse other questions tagged, Start here for a quick overview of the site, Detailed answers to any questions you might have, Discuss the workings and policies of this site. Host is just like a computer; it can be a physical device or virtual. This mechanism includes password protection, along with encryption, to prevent injection of false results in to Nagios. This command accepts the host name, service description, status code, and the textual output from a check. Service state changes can also trigger on-demand host checks. ##### ##### # # SAMPLE SERVICE CHECK COMMANDS # # These are some example . Manual tuning is needed to tell MySQL to listen on other interfaces as well. There are also different types of checks including external applications or devices that want to report information directly to Nagios. The plugins can be in any language, Nagios only cares They can be the following: 0: OK This defines that check_nrpe is the command and check_root_home_du is the value of $ARG1$. host_name Server01 When everything goes smoothly, we should be able to see our new Nagios client on the Nagios website with its new service OS: unread mail for root, as well as the status green OK. It can also be used by third-party applications running on different machines to send passive check results to a central Nagios server. It says -S is for version. All of the scripts are located at /etc/nagios-plugins/config/ with the executable files stored at /usr/lib/nagios/plugins/. Establish a terminal session to your Nagios XI server and execute the following command: So I will add at the end of the file the following block:Advertisement.banner-1{text-align:center;padding-top:20px!important;padding-bottom:20px!important;padding-left:0!important;padding-right:0!important;background-color:#eee!important;outline:1px solid #dfdfdf;min-height:335px!important}if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[300,250],'howtoforge_com-banner-1','ezslot_4',111,'0','0'])};__ez_fad_position('div-gpt-ad-howtoforge_com-banner-1-0');.banner-1{text-align:center;padding-top:20px!important;padding-bottom:20px!important;padding-left:0!important;padding-right:0!important;background-color:#eee!important;outline:1px solid #dfdfdf;min-height:335px!important}if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[300,250],'howtoforge_com-banner-1','ezslot_5',111,'0','1'])};__ez_fad_position('div-gpt-ad-howtoforge_com-banner-1-0_1');.banner-1-multi-111{border:none!important;display:block!important;float:none!important;line-height:0;margin-bottom:7px!important;margin-left:auto!important;margin-right:auto!important;margin-top:7px!important;max-width:100%!important;min-height:250px;padding:0;text-align:center!important}. How to install and configure nagios on centos 7 step by step ile ilikili ileri arayn ya da 22 milyondan fazla i ieriiyle dnyann en byk serbest alma pazarnda ie alm yapn. NSClient++ includes a service module that can check if a service is running. Nagios can monitor different mail server components like SMTP, POP, IMAP and mailq. It allows the implementation of plugins, developed by the community, or even allows us to configure our own monitoring scripts. this is THE MOST comprehensive and straight forward turorial I've seen. When the service check has completed, the child process will inform the main Nagios process (its parent) of the check results. mark separates the command from the arguments in the check_command entry. Fortra's Intermapper vs Kaseya Traverse: which is better? The time performed is specified in seconds. Treat NRPE connection failures as 'UNKNOWN' service state, and don't notify on UNKNOWN services . It will give you all the available options: This website is made possible by minimal ads and your gracious donation via PayPal or credit card. On any device & OS. The sections below provide examples of how to perform these checks using different methods. The object needs to have the passive_checks_enabled option set to 1 for Nagios to accept passive check results over the command pipe. Enable and restart the nrpe service: [user@mon]# systemctl enable nrpe [user@mon]# systemctl restart nrpe. To allow it to grow bigger before rotating, add more zeroes, for example. If up-to-date information has been provided by a passive check during this period, then it will not perform active checks. Nagios: Disable notifications from command line on Windows/Linux. It shows what is performed by Nagios in both cases and what needs to be done by the check command or an external application for passive checks. The plugin returns a CRITICAL state if the service is not started. vegan) just to try it, does this inconvenience the caterers and staff? # Sample object config file for Nagios : 3 # 4 # Read the documentation for more information on this configuration file. Nagios Plugins does not include a service plugin however the linux-nrpe-agent does provide check_init_service. :), I will also menton for new users that using, The debug_levels are binary - 2048 only turns on messages from macros. Check WMI Plus allows you to check multiple services, here is an example that checks for two services that are running. In the following example, we are checking whether the website certificate expires in the next 365 days. Then we are removing spaces using sed and finally cut the appropriate field using cut, i this case field 5 is what we want. The output indicates that it expires in 300 days. The application can also periodically let Nagios know if it succeeded in using the database without problems. Passive checks are useful for monitoring services that are: Examples of asynchronous services that lend themselves to being monitored passively include SNMP traps and security alerts. With a little tweaking, Nagios can help monitor this application port as well. This is very important in situations where a host behind a router is reported to be down because the router is actually down. The provided scripts contain help on the syntax. document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); Monthly digest of what's new and exciting from us. As mentioned earlier, server-2 has postfix mail server set up on it. But if you just want to check if the instance is up and running (and not add more complexity), you can use the simple script provided here. When max_check_attempts is executed and status of the host or service is still not OK, then hard state is used. Nagios can check whether the server is online by running ping on the IP/name of the server as well as it can be set up to provide warnings in case the round trip time (RTT) to the server increases. The host or the services will be tested again and again till the time the status is permanent. NRDP has several benefits over NSCA, including: Connect and share knowledge within a single location that is structured and easy to search. Nagios can tell what the status of the service is by reading the exit code of the check. By using this website, you agree with our Cookies Policy. 164060 Nagios HTTP/HTTPS check via wget (with/without Proxy) Check website accessibility by return code and execution time. On-demand checks are performed as part of the predictive service dependency check logic. For example, to set up a very similar service, all we need to do is to use the same parameters as those for the hosts: In this case, Nagios will never perform any active checks on its own and will only rely on the results that are passed to it. Nagios also offers a tool for sending passive check results for hosts and services over a network. But if the monitoring application is not running or some other issue prevents it from reporting, Nagios can use active checks to keep the service status upto-date. In such a case, checks are done by other programs, and their results are sent to Nagios.
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