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After installing nagios and nagios-plugins-all (via yum), I've c. nagiosrpm. Check WMI Plus allows you to check multiple services, here is an example that checks for two services that are running. Check HTTP Check whether Apache HTTP is running on a remote server using check_http. 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 plugin on it. define service{ I will use a simple example. While Nagios can monitor multiple OSes, the server must reside on a Linux or Unix variant such as FreeBSD or Solaris. For HTTPS running on a different port, do the following. Stack Exchange network consists of 181 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers. hello.. 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. 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. Check whether Apache HTTPS is running on a remote server using check_http. My code is GPL licensed, can I issue a license to have my code be distributed in a specific MIT licensed project? If the situation involves reporting problems from other applications or machines, it is definitely a use case for a passive check. If you would like to use the whole or any part of this article, you need to cite this web page at Xmodulo.com as the original source. 13. With a little tweaking, Nagios can help monitor this application port as well. 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! Otherwise we must rely on parsing the # output from the service management tool. It can also send reports after a database recovery, or periodically, even if connectivity to the database has been consistently available, so that Nagios has an up-to-date status. The above definitions add a host called ubuntu_host and defines the services which will run on this host. Default is 10 seconds. Cached checks will only provide a performance increase if you are making use of service dependencies. In Nagios, 2 types of checks are performed on hosts and services . great! Depending on the status received on hosts and services, appropriate action is taken. Agree will hold the return value of commands between $( ). 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 >Mainly Focus on Kafka and Cloudera services, Cluster . These checks help ensure that the dependency logic is as accurate as possible. The nature of simulating nature: A Q&A with IBM Quantum researcher Dr. Jamie We've added a "Necessary cookies only" option to the cookie consent popup. I've # provided some comments here, but things may not be so clear without further # explanation, so make sure to read the HTML documentation! I wouldn't leave this setting on normally though, it is very verbose and fills your log file at a rapid rate. How can I get it to work with https with Nagios4 and plugins 2.x? Kaydolmak ve ilere teklif vermek cretsizdir. An external application checks the status of a host or service. Here is an example set of passive checks that . Would you please be so kind as to help me? Nagios stores the status of the hosts and services it is monitoring to determine if they are working properly or not. However, applications on remote hosts can't do this so easily. 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. 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. 2022 Company, Inc. All rights reserved. By default Nagios supports URL monitoring and there is an command check_http, however if you want to monitor URL like SSL certification you can also do by extending the command options. It looks like that with the default install, theres no configuration set up to tell Icinga where to look for the check_http executable. Submitting Passive Check Results From Remote Hosts. For example, if you are bringing down your HTTP server everyday sometime between midnight and 1:59 a.m, you can specify the above "247-except-night-12-2" timeperiod in your service definition for the check_period and notification_period as shown below for your particular service definition. Add the command to the NRPE configuration file on the client (/etc/nagios/nrpe_local.cfg): Now we can access the server and test it like any standard plugin. You have entered an incorrect email address! The following line is commented out to make MySQL listens on all interfaces. 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. 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. The same queue that is used for storing results from active checks is also used to store the results from passive checks. define service{ use generic-service host_name web1.onemetric.com.au service_description Uptime check_command snmp_Uptime!-C public } Adjust the commands as required. Thanks for contributing an answer to Server Fault! NPCA includes a service module that can check if a service is stopped. I Have problem with the check_http when I try ur command test , I have the next message : This file location depends on the configuration you've done, in my case it is in /usr/local/nagios/etc/objects/commands.cfg. Nagioshttpdgccgd. NSClient++ includes a service module that can check if a service is running. For instance, a model for the file could be: The idea of having that generic file is so that you can check the same on every client. I've: 5 # provided some comments here, but things may not be so clear without further . For example, a plugin which returns a WARNING state will cause a service to have a WARNING state. Agree What can a lawyer do if the client wants him to be acquitted of everything despite serious evidence? :), I will also menton for new users that using, The debug_levels are binary - 2048 only turns on messages from macros. If you want Nagios to treat all passive check results for hosts as if they were soft results, you need to enable the following option in the main Nagios configuration file: Passive service checks are very similar to passive host checks. It can also be used by third-party applications running on different machines to send passive check results to a central Nagios server. This is a plugin for Nagios wich you can use to check if a linux service is running. Set enable_notifications=0 in nagios.cfg. The following figure shows soft states and hard states. On any device & OS. The time performed is specified in seconds. The following screenshot shows a complete overview of all the service checks that have been configured so far. This mechanism includes password protection, along with encryption, to prevent injection of false results in to Nagios. No paper. There are no attachments for this article. First, the servers are defined in Nagios. The flexibility provided by Nagios is perfect for these case scenarios. They have a lot of advantages and some disadvantages. - specific URL support - ssl option - alternative port - fake user agent - proxy as parameter - proxy from environment variable Usage: check_website [OPTIONS] {HOSTNAME} {HOSTNAME} host to check (dns/ip) [OPTIONS]: Check WMI Plus includes a service module that can check if a service is stopped. In this example we are going to define a service and assign it to localhost, because this check is on Nagios itself. These checks are useful when you cannot monitor hosts/services on a regular basis. 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. From the GroundWork Monitor menu, selecting Configuration > Nagios Monitoring > Services > Service Templates presents the options New, Copy, and Modify. /usr/lib/nagios/plugins/check_nrpe -H 3.6.123.156 -c check_root_home_du. The command to submit passive checks is PROCESS_HOST_CHECK_RESULT (visit http://www.nagios.org/developerinfo/externalcommands/commandinfo.php?command_id=115). Attributes can be used for both hosts and services. 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. Also, MySQL would not let just any host to connect to it. 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. Passive checks are also used when configuring distributed or redundant monitoring installations. Nagios can monitor different mail server components like SMTP, POP, IMAP and mailq. Services that are checked can be in one of four different states: Service checks are performed by plugins, which can return a state of OK, WARNING, UNKNOWN, or CRITICAL. this is more along the lines of what i meant. Find the plugin you want to run (if you're not sure, compare what you see in your plugins directory on your Linux box with the plugins located here: http://exchange.nagios.org/directory/Plugins, or try running "./plugin-name -h" to get the help info about the plugin). +1 and if that seems like too much trouble you could always look at the Nagios config files to see what command and parameters need to be run. Treat NRPE connection failures as 'UNKNOWN' service state, and don't notify on UNKNOWN services . An example shell script of how to submit passive service check results to Nagios can be found in the documentation on volatile services. The object needs to have the passive_checks_enabled option set to 1 for Nagios to accept passive check results over the command pipe. nagiostats provides statistics of which only the part `Services Ok/Warn/Unk/Crit: 8 / 0 / 0 / 0` are interesting to us, so we are using grep to extract this line. On the next screen: Enter a unique name in the Command Name field (suggest one is check_host_cluster and the other check_service_cluster) Append --host to the Command Line section for host . Nagios check service frequency based on service status, how can execute nagios commands from command line in linux. It allows to configure alerts and has different states for them. The results are passed to Nagios in the same way as they are passed for hosts. In most cases you'll use Nagios to monitor your hosts and services using regularly scheduled active checks. The -S option is not working with 2.0 plugins. How to tell which packages are held back due to phased updates. You can check tomcat server, or apache server, or glassfish, or any server that is running on a different port by speficying the port number as shown below. document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); Monthly digest of what's new and exciting from us. These types of checks are called Passive Checks. 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! Note: A host must be defined in Nagios before you can submit passive check results for it! When it is an active check result, Nagios takes the fact that switch1 is down into account and maps the child nodes result into an UNREACHABLE state. When Nagios checks the status of services, it will be able to detect when a service changes between OK, WARNING, UNKNOWN, and CRITICAL states and take appropriate action. When it comes in as a passive check, no state translation is done and Nagios stores the host and all child nodes being down. Passive Checks and NSCA (Nagios Service Check Acceptor), Technology news, insights and tutorials from Packt, Top 6 Cybersecurity Books from Packt to Accelerate Your Career, Your Quick Introduction to Extended Events in Analysis Services from Blog, Logging the history of my past SQL Saturday presentations from Blog, Storage savings with Table Compression from Blog Posts SQLServerCentral, Daily Coping 31 Dec 2020 from Blog Posts SQLServerCentral, Learning Essential Linux Commands for Navigating the Shell Effectively, Exploring the Strategy Behavioral Design Pattern in Node.js, How to integrate a Medium editor in Angular 8, Implementing memory management with Golangs garbage collector, How to create sales analysis app in Qlik Sense using DAR, http://www.nagios.org/developerinfo/externalcommands/commandinfo.php?command_id=114, ExploringForms in Angular types, benefits and differences. Nagios can be used to monitor Apache web server as well. For example: Passive checks are performed by external processes and the results are given back to Nagios for processing. Consider that you have put your host definitions inside host1.cfg file in /usr/local/nagios/etc/objects directory. When max_check_attempts is executed and status of the host or service is still not OK, then hard state is used. For any support related questions please visit the Nagios Support Forums at: Article Number: 775 | Rating: Unrated | Last Updated by. Some of the scripts provided with Nagios are restricted to the local server only. This task is really easy as Nagios has a built-in command for this. Once again, we are dealing with open source software, and Nagios purpose is aimed at monitoring computer systems. $ vi /usr/local/nagios/etc/servers/devserver.cfg Nagios also offers another way to work with the statuses of hosts and services. Nagios: Disable notifications from command line on Windows/Linux. If a service is set up with a max_check_attempts directive of 5, then the same number of passive check results would need to be passed in order for Nagios to treat the new status as a hard state change. Let us assume that the following custom application is also running in the network, listening on a particular port. To figure this out I set nagios into debug mode with the configuration like this. Nonetheless, they can be tuned to match the requirements. . 28. The plugin returns a CRITICAL state if the service is not started. Nagios is the most popular tool which is used to monitor hosts and services running in your IT infrastructure. 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. This way, Nagios can help monitor the accessibility of both MySQL servers and the database stored within the servers. Nagios understands the following exit codes: This plugin uses systemctl is-active command, please check you have systemd. In the Select resource macro: section, select USER1. The next parameter specifies the number of seconds after which Nagios should consider the results to be out of date. if one of my checked systems goes down, and therefore fails a PING check, I do NOT need to be notified that a file system is unavailable, or that SSH is down, too. ##### ##### # # SAMPLE SERVICE CHECK COMMANDS # # These are some example . Nagios can monitor DNS service by asking the DNS server to either resolve a specific fully qualified domain name (FQDN), or by asking the server to use the dig tool. By using this website, you agree with our Cookies Policy. This tutorial will cover the process of using some of these scripts for checking common services, such as MySQL, Apache web server, DNS, etc.

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