The best answers are voted up and rise to the top, Not the answer you're looking for? External applications can submit passive host check results to Nagios by writing a PROCESS_HOST_CHECK_RESULT external command to the external command file. thank you! Hello, ask a question, check_http detect page size, page size detection value changes again, the alarm. In the following example, we are checking whether the website certificate expires in the next 365 days. This article assumes you have a working knowledge of Nagios. So if you wanted to run the check_http check from the CLI, you would run ./check_http -I, where the I flag stands for the IP Address (, I struggled to get this to work, not sure what i was doing wrong (noob) but the debug_level trick worked for me :). Copy the configuration file to the Apache directory: /usr/bin/install -c -m 644 sample-config/httpd.conf /etc/apache2/sites-available/nagios.conf Install the Nagios Plugins to have a set of tools to monitor your different services: apt install build-essential libssl-dev gcc . Asking for help, clarification, or responding to other answers. I wrote a plugin in a bash script to check for current Warnings. The following is an example of the required configuration for a host that accepts passive checks and has active checks disabled: define host { use generic-host host_name linuxbox01 address 10.0.2.1 Learn more about Stack Overflow the company, and our products. This user is then granted all permission to all databases and will be used for monitoring. Usually within a few seconds the full check command pops up and I then kill the while loop and run the check command. Edit the /usr/local/nagios/etc/objects/localhost.cfg file and add the following block: Now we are all set, the only thing pending is reloading Nagios to read the configuration files again. It can test normal (http) and secure (https) servers, follow redirects, search for strings and regular expressions, check connection times, and report on This example is going to restart the crond service as it is unlikely to cause any issues. A good example of such a test is checking whether there are bad blocks on a disk. These are real-time graphs showing things like CPU usage, memory usage, and bandwidth. Did any DOS compatibility layers exist for any UNIX-like systems before DOS started to become outmoded? You have entered an incorrect email address! This yields less output to dig through. check_command /usr/share/nagios/plugins/check_http -H MYIP -u http://MYIP/test.php, Hi, Nagios also offers a way of combining the benefits of both active and passive checks. Add additional tags that should be sent in the HTTP header. Service or Daemon checks are system processes that run in the background, usually configured to start when the system boots. However, two hours after the last passive or active check result was received, Nagios would perform an active check to keep the results up-to-date. Nagios will be configured to monitor SMTP and mail queue of the server. This setting will expose MySQL to all available interfaces, including WAN. # Nagios Exit Codes OK=0 WARNING=1 CRITICAL=2 UNKNOWN=3 # Weather or not we can trust the exit code from the service management tool. Check HTTPS Check whether Apache HTTPS is running on a remote server using check_http. In case you don't have the plugin in the Nagios server, you can install it with: So, summarizing, the NRPE will run a script in a remote host, and return the exit code to the Nagios server. Checking if a service is running using SNMP is not very straight forward, checking a process is the best solution here, please refer to the Process Checks KB article. @sunardo I just ran into this exact same thing. In order to allow remote hosts to send passive check results to the monitoring host, I've developed the NSCA addon. We can also do it at a contact level, by disabling notifications . Then we are removing spaces using sed and finally cut the appropriate field using cut, i this case field 5 is what we want. On-demand checks are performed as part of the predictive service dependency check logic. Force a check and you will see exactly how the command is being run. These plugin states directly translate to service states. Otherwise we must rely on parsing the # output from the service management tool. Securely download your document with other editable templates, any time, with PDFfiller. UNKNOWN 2013-04-25 18:11:24 0d 0h 55m 37s 4/4 RESPONSE: UNKNOWN ERROR: /usr/bin/nc does does not exist, i am really getting frustrate from this nagios error, nitin: you need to install the netcat package for your distribution which will provide /usr/bin/nc, I had been using this plugin for a while. I wouldn't leave this setting on normally though, it is very verbose and fills your log file at a rapid rate. use generic-service ; Name of service template to use Nagios: Disable notifications from command line on Windows/Linux. The basic workings of service checks are described here Services are checked by the Nagios daemon: On-demand checks are performed as part of the predictive service dependency check logic. The script should then post results to the Nagios daemon. As mentioned earlier, server-2 has postfix mail server set up on it. This setting is done on all MySQL servers. It is called NSCA (Nagios Service Check Acceptor). In addition, it is run on the Linux operating system, precisely for the purpose of monitoring devices that are executed on Windows, Unix and Linux operating systems.Its main task is to constantly check key server resources, applications, networks and tasks. Get your subscription here. Check WMI Plus includes a service module that can check if a service is running. Some methods support checking multiple services at once. can anyone help me out for this problem:-, Check-Website-Response Some of the scripts provided with Nagios are restricted to the local server only. Passive checks require all the logic related to what should be reported and when it should be checked to be put in an external application. You never know how many (if any) traps or alerts you'll receive in a given time frame, so it's not feasible to just monitor their status every few minutes. This can be done in addition to active checks, to identify critical problems earlier. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. 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. Follow these steps to install the plugin: Download the plugin. The output indicates that it expires in 300 days. Mar 01, 2023 (Heraldkeepers) -- United States, New Jersey- The most recent analysis of the DNS Monitoring Tool market by Infinity Business Insights offers a. To keep the article focused on service monitoring, we will not be configuring hostgroups or templates, as they have been covered in the previous tutorial. Nagios Plugins does not include a service plugin however the linux-nrpe-agent does provide check_init_service. Once the host and services are configured on Nagios, checks are used to see if the hosts and services are working as they are supposed to or not. document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); Monthly digest of what's new and exciting from us. The host status code should be 0 for an UP state, 1 for DOWN and 2 for an UNREACHABLE state. How to Write a Custom Nagios Check Plugin, /usr/local/nagios/etc/objects/commands.cfg, /usr/local/nagios/etc/objects/localhost.cfg, /usr/lib/nagios/plugins/check_users -w 5 -c 10, /usr/local/nagios/etc/objects/nrpeclient.cfg, Generic installation on Debian-based Client, Set the NRPE Check on the Server Configuration Files, Develop Network Applications for ESP8266 using Mongoose in Linux, How to Setup IKEv2 IPSec VPN Using strongSwan and Let's Encrypt on Rocky Linux 9, ISPConfig Perfect Multiserver setup on Ubuntu 20.04 and Debian 10, Generating Web Site Statistics With AWStats & JAWStats On Debian Lenny, How to Install Jitsi Video Conference Platform on Debian 11, How to Install LAMP Server Stack on Ubuntu 22.04, How to use grep to search for strings in files on the Linux shell, You have Nagios installed and running (You can follow this. In the Select resource macro: section, select USER1. The documentation uses the example of: for . There are also different types of checks including external applications or devices that want to report information directly to Nagios. When defining and testing new services in nagios I have been restarting nagios, then clicking the service, and rescheduling a check for as soon as possible, then waiting until the check happens. Giving material.angular.io a refresh from Angular Blog Medium. There are several different use cases covered in this KB article: The sections below provide examples of how to perform these checks using different methods. Let us see an example to perform checks on host Consider that you have put your host definitions inside host1.cfg file in /usr/local/nagios/etc/objects directory. debug_level=2048 With nagios in debug mode I simply tail the debug_log file debug_file=/var/log/nagios3/nagios.debug. My code is GPL licensed, can I issue a license to have my code be distributed in a specific MIT licensed project? Nagios check_udp_ports returning critical: result to scheduled check, runs fine manually, Nagios - check procs and --metric=elapsed on the same service. . nagiosrpm. However, in a big environment it is very likely to need some custom checks for specific uses, for instance: Checking on a certain task result, monitoring an in-house developed application, among others. As mentioned earlier, Nagios can forgo the actual execution of an on-demand service check if it can use the cached results from a relatively recent service check. Hi, thanks for your comment. Passive service checks are often used to report the results of long lasting tests asynchronously. It looks like that with the default install, theres no configuration set up to tell Icinga where to look for the check_http executable. You can tell Nagios to translate DOWN/UNREACHABLE passive check result states to their "proper" state by using the translate_passive_host_checks variable. Nagios allows applications and event handlers to send out passive check results for host objects. Server Fault is a question and answer site for system and network administrators. It can be used to send results from one Nagios instance to another. Consider the following script (check_warnings.sh): Based on the information provided by the nagiostats tool, I assume everything is ok if there are five or less services in Warning state.if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[300,250],'howtoforge_com-medrectangle-4','ezslot_1',108,'0','0'])};__ez_fad_position('div-gpt-ad-howtoforge_com-medrectangle-4-0');if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[300,250],'howtoforge_com-medrectangle-4','ezslot_2',108,'0','1'])};__ez_fad_position('div-gpt-ad-howtoforge_com-medrectangle-4-0_1');.medrectangle-4-multi-108{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}. The figure shown below shows an active check . Check whether Apache HTTPS is running on a remote server using check_http. No software installation. NPCA includes a service module that can check if a service is stopped. Let's consider I have the Nagios server configured to alert only on critical status, so I want an alert if I have too many services on a Warning status. In Nagios, 2 types of checks are performed on hosts and services . Do roots of these polynomials approach the negative of the Euler-Mascheroni constant? Another example is where an application already processes information such as network bandwidth utilization. }. vegan) just to try it, does this inconvenience the caterers and staff? You'll see the following line inside the /etc/rc.d/init.d/nagios script for the Nagios startup: $NagiosBin -d $NagiosCfgFile