nagios service check example

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. Check WMI Plus allows you to check multiple services, here is an example that checks for two services that are running. 5 check_http examples It has been designed to run . That is superb artile I was looking for! When the service check has completed, the child process will inform the main Nagios process (its parent) of the check results. Now send a trap and see how the service appears as in Nagios XI. Up To: Contents JOB, Nagios SNMP checks - The Noc Cave This increases the security of the database. Nagios provides a sample configuration file, that we will use. A good example would be a server that is a part of an application, processing job queues using a database. Monitoring Website URL Status My code is GPL licensed, can I issue a license to have my code be distributed in a specific MIT licensed project? Even the location of the plugins directory is in there. The check_init_service plugin does not support checking multiple services. Service or Daemon checks are system processes that run in the background, usually configured to start when the system boots. It is possible to configure Nagios so that it will receive status information sent over a command pipe. The following figure shows soft states and hard states. Fortra's Intermapper vs Kaseya Traverse vs Nagios XI comparison When a host is reported to be DOWN as a passive check result, Nagios does not perform a translation from DOWN to UNREACHABLE. In cases where the checks require the deployment of long-running processes or monitoring information constantly, this should be done as a passive service. . 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. 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. How to Define Nagios Timeperiod Exclude for Maintenance Window The figure shown below shows a passive check . They may or may not work on: 44 # your system, as they must be modified for your plugins. you have the flexibility of sending the passive check to Nagios with a different hostname. @sunardo I just ran into this exact same thing. Nagios - Checks and States - tutorialspoint.com Remotely monitor servers with the Nagios check_by_ssh plugin Nagios Enterprises makes no claims or warranties as to the fitness of any file or information on this website, for any purpose whatsoever. -c 7 -w 5 -v. Any pointer if I am missing anything but obvious. In such a case, checks are done by other programs, and their results are sent to Nagios. Check WMI Plus includes a service module that can check if a service is stopped. How can I make Status Information for Nagios services easier to read? I've deployed a new instance of Nagios on a fresh install of CentOS 7 via the EPEL repository. The default FQDN used for testing is www.google.com, but it can be changed as needed. Ensure that the local file and .d directory are included in the main configuration file with: Now check one of the previously defined NRPE commands from the Nagios server: Note that the check_users NRPE command was defined in the /etc/nagios/nrpe_local.cfg file to run /usr/lib/nagios/plugins/check_users -w 5 -c 10. In order to use them, the host needs to be configured to accept passive checks results. To use a custom script as a plugin to run remotely through NRPE, you should first write the script on the server, for instance in /usr/local/scripts/check_root_home_du.sh: The previous script is a very simple example, checking the disk usage of the directory /root and setting a threshold for considering it OK, Warning or Critical. System Monitoring Via Nagios and SNMP< SNMP snmp is an internet protocol that allows you to retrieve management information from a remote device or to set configuration settings on a remote device. Try to put full path in the command line. Please refer tohttp://tldp.org/LDP/abs/html/untyped.html, hi! Agree Nagios understands the following exit codes: A program can be written in any language to work as a Nagios check plugin. 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Let us assume that the following custom application is also running in the network, listening on a particular port. How to install and configure nagios on centos 7 step by step leri . Viewed 12725 times since Tue, Nov 14, 2017, Viewed 18667 times since Tue, Nov 28, 2017, Viewed 70502 times since Thu, Nov 9, 2017, Viewed 9709 times since Tue, Nov 14, 2017, Viewed 12197 times since Wed, Nov 29, 2017, Viewed 47389 times since Thu, Nov 9, 2017, Viewed 14647 times since Sun, Nov 26, 2017, Viewed 42173 times since Mon, Nov 13, 2017, Viewed 18034 times since Wed, Nov 15, 2017, Viewed 22586 times since Sun, Nov 26, 2017. The Nagios server is running on Ubuntu. The next time Nagios reads the external command file it will place the results of all passive checks into a queue for later processing. By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. Nagios, NagiosXI, Nagios Core, Nagios Logger, Manage Engine, Idera, Quest, Thousand Eyes Idera Suite and Quest, SQL Monitoring Solution Implementation More information on the flap detection logic can be found here. Default is 80, This will use HTTPS using default 443 port. Stats Graphs - Live data graphs of CPU, memory, interface bandwidth, and disk usage. 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. Configure Docker Daemon for Remote Connections - kifarunix.com The results are passed to Nagios in the same way as they are passed for hosts. How to Write a Custom Nagios Check Plugin - HowtoForge First you should define a command in the commands.cfg file. An example shell script of how to submit passive service check results to Nagios can be found in the documentation on volatile services. NPCA allows you to check multiple services, here is an example that checks for some services that are running and some that are stopped. 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. It is possible to monitor machine metrics, such as disk usage, CPU use, and so on. 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. How to install and configure Nagios Core. Thus, the difference between active and passive check is that active checks are run by Nagios and passive checks are run by external applications. Minimum number of days a SSL certiface must be valid. Nagios Monitoring Hosts with check_ping - Stack Overflow The above definitions add a host called ubuntu_host and defines the services which will run on this host. vegan) just to try it, does this inconvenience the caterers and staff? The module can only check if the service is started, you could however use the negate plugin to invert the returned result from the plugin (hence making CRITICAL an OK state). In this example we are going to define a service and assign it to localhost, because this check is on Nagios itself. Host is just like a computer; it can be a physical device or virtual. 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. /usr/nagios/libexec/check_http .. Establish a terminal session to your Nagios XI server and execute the following command: The following is a sample script that will accept the host name, status code, and output from a check and will submit these to Nagios: As an example of the use of this script, the command that is sent to Nagios for host01, status code 2 (UNREACHABLE) and output router 192.168.1.2 down would be as follows: When submitting results, it is worth noting that Nagios might take some time to process them, depending on the intervals between Nagios checks of the external command pipe. In the Select resource macro: section, select USER1. Services are those which are used by Nagios to check something about a host. An example shell script of how to submit passive service check results to Nagios can be found in the documentation on volatile services. The following diagram shows how both active and passive checks are performed by Nagios. Configuring a Nagios Monitoring System | Scaleway Documentation For any support related questions please visit the Nagios Support Forums at: Article Number: 775 | Rating: Unrated | Last Updated by. Nagios check_by_ssh returns status 3 even though running the command manually works? Nagios is the most popular tool which is used to monitor hosts and services running in your IT infrastructure. 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. On-demand checks are performed as part of the predictive service dependency check logic. 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. Let us see an example to perform checks on host . awesome. Here is an example set of passive checks that . I've provided some comments here, but things may not be so # clear without further explanation. 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. In both the cases, the idea is that Nagios receives information about host statuses over the external commands pipe. I wouldn't leave this setting on normally though, it is very verbose and fills your log file at a rapid rate. You might also want to give the 'capture' plugin a try. The following file can be modified to do the job. :), I will also menton for new users that using, The debug_levels are binary - 2048 only turns on messages from macros. How can we prove that the supernatural or paranormal doesn't exist? Start the Nagios again. Please note that this article is published by Xmodulo.com under a Creative Commons Attribution-ShareAlike 3.0 Unported License. With a little tweaking, Nagios can help monitor this application port as well. Hello, ask a question, check_http detect page size, page size detection value changes again, the alarm. The first thing that needs to be done in order to use passive checks for your Nagios setup is to make sure that you have the following options in your main Nagios configuration file: It would also be good to enable the logging of incoming passive checksthis makes determining the problem of not processing a passive check much easier. But today when I am trying to post an XML message to the server, from console it works well but does not work with nrpe. Mar 01, 2023 (Heraldkeepers) -- United States, New Jersey- The most recent analysis of the DNS Monitoring Tool market by Infinity Business Insights offers a. can anyone help me out for this problem:-, Check-Website-Response check_http -H hostname (or) -I ip-address {optional options}. Just cd (or not) into the plugins directory (this directory location varies, depending on how you've installed it, but check /usr/local/nagios, or /usr/lib/nagios). The same queue that is used for storing results from active checks is also used to store the results from passive checks. Default is HTTP/1. These types of checks are called Passive Checks. I am gettinr this error in nagios3. Service Checks - Nagios Support It essentially does the same thing as a debug level of 2048, but can be used on a per-plugin basis. This mechanism includes password protection, along with encryption, to prevent injection of false results in to Nagios. This defines that check_nrpe is the command and check_root_home_du is the value of $ARG1$. In such cases, Nagios decides when a check is to be performed, runs the check and stores the result. By default you do not need to change any of the lines in this file and . To allow it to grow bigger before rotating, add more zeroes, for example. In order to allow remote hosts to send passive check results to the monitoring host, I've developed the NSCA addon. hello.. 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. Nagioshttpdgccgd. Installing the Nagios Remote Plugin Executor In this lab, we will install the Nagios Remote Plugin Executor on the Nagios Core Host as well as any remote hosts on which we haven't already installed it. Add the file to the standard Nagios Core location, /usr/local/nagios/libexec. Use Hiera. Note: Certain nodes in the above example have combined check results, such as memory/virtual, memory/swap, and processes. Follow these steps to install the plugin: Download the plugin. Learn more. Thanks for contributing an answer to Server Fault! Now that the syntax is available, TCP port 80 can be checked as follows. This plugin uses systemctl is-active command, please check you have systemd. - 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]: It only takes a minute to sign up. Like every Nagios plugin, you will want to check from the command line before adding it to the configuration files. Do not wait for whole document body to download. To turn on everything you want to set debug_level=4095. We make use of First and third party cookies to improve our user experience. There are no attachments for this article. Nagios dependencies.cfg example file. The following directive allows it: Setting up hosts or services for passive checking requires an object to be defined and set up so as not to perform active checks. Monitoring Log Messages with Nagios Passive Checks | ls -A Would you please be so kind as to help me? >Mainly Focus on Kafka and Cloudera services, Cluster . Now we know that the custom plugin is working on the client and on the server, and that the NRPE is communicating correctly, we can go ahead and configure Nagios files for checking the remote device. 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. Services are those which are used by Nagios to check something about a host. As an example of the use of this script, the command that is sent to Nagios for host01, service PING, status code 0 (OK) and output RTT=57 ms is as follows: A very common scenario for using passive checks is a check that takes a very long time to complete. This feature is only available to subscribers. 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. The object file localhost.cfg allows for parameters to be passed to check_ssh. Is there a proper earth ground point in this switch box? I've: 5 # provided some comments here, but things may not be so clear without further . What is check_http? While Nagios can monitor multiple OSes, the server must reside on a Linux or Unix variant such as FreeBSD or Solaris. Note: Passive host checks are normally treated as HARD states, unless the passive_host_checks_are_soft option is enabled. These checks are scripts and progams which take input (for example, which host to check, tresholds), do a check and then return an exit code and some performance data. 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. Nagios ()_DevilRex119_51CTO VS Code extension | 35 comentarios en LinkedIn Check whether Apache HTTPS is running on a remote server using check_http. (If I were running df -h on the linux CLI, I'm using the "h" flag - in the case of the df command, the h stands for "human readable".) Nagios: Disable notifications from command line on Windows/Linux. This will give an idea on whether the execution will be successful and what the output of the script will look like. Submitting Passive Check Results From Remote Hosts. So in the server set the files: /usr/local/nagios/etc/objects/commands.cfg: /usr/local/nagios/etc/objects/nrpeclient.cfg: Note that the ! Service - Started Check to see if a service is started. It will give you all the available options: Simple invoke the command with -s parameter and the name of the service Example of use ./check_service -s ntpd Thank you! . Select check_cluster from the plugin pop-up menu. And in Puppet agent, I have to define the environment (Dev, Test or Prod). This is the main configuration file of Nagios core. 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 Nagios.cfg is the main configuration file for your Nagios Core. # 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. Each server runs one or more common services. The NSCA addon consists of a daemon that runs on the Nagios hosts and a client that is executed from remote hosts. Nagios server in this example is hosted on 192.168.0.150 and an example client is hosted on IP 192.168.0.200. See the HTML : 45 By default, Nagios handles results from active and passive checks differently. No paper. You can tell Nagios to translate DOWN/UNREACHABLE passive check result states to their "proper" state by using the translate_passive_host_checks variable. (In this example, the script will print All ok and it will exit with 0, the OK . Scheduled service checks are run in parallel. Is it possible to check a web page through an authenticated proxy server? /usr/local/nagios/libexec/check_ping -H 192.168.1.2 -w 100.0,90% -c 200.0,60% .use: Does a summoned creature play immediately after being summoned by a ready action? Pass the specified string as User Agent in HTTP header. NPCA includes a service module that can check if a service is running. This requires trying to read the entire disk directly from the block device (such as /dev/sda1) and checking if the attempt has failed. Server Fault is a question and answer site for system and network administrators. Latest Insight on DNS Monitoring Tool Market Outlook 2023 to 2030 With For those unfamiliar with Nagios, it is a monitoring system which can execute checks. [SOLVED] Nagios dependencies.cfg example file It's pretty simple. Nagios, the Nagios logo, and Nagios graphics are the servicemarks, trademarks, or registered trademarks owned by Nagios Enterprises. To learn more, see our tips on writing great answers. Sometimes I find it tricky figuring out exactly what a plugin is doing. Manula's Blog: Monitoring a HTTPS URL with Nagios Nagios can detect when services start flapping, and can suppress notifications until flapping stops and the service's state stabilizes. These checks can provide useful insight on what is going on within 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. Linux Check Service - Nagios Exchange How can I manually run a nagios check from the command line? When a passive result check comes in to Nagios, Nagios expects that the result already has a network topology included. b-b.mit.edu In the left navigation pane, select "Process Info" and then "Disable Notifications" and "Commit.". Having managed large Nagios installations for many years, assigning services to hostgroups is an anti pattern and can make things complicated fast if your environment gets big. Nagios, the Nagios logo, and Nagios graphics are the servicemarks, trademarks, or registered trademarks owned by Nagios Enterprises. The script should then post results to the Nagios daemon. Submitting Passive Host Check Results External applications can submit passive host check results to Nagios by writing a PROCESS_HOST_CHECK_RESULT external command to the external command file. The NRDP addon allows administrators to migrate from using NSCA to NRDP fairly easily. 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. Previous parts of this book often mentioned Nagios performing checks on various software and machines. thanks! Note that there are possible security implications of this change, so it's worth mentioning a few words: The following tuning should do the trick. Now in your configuration for checks for a host you can create the following service check. In order to make Nagios treat passive host check results in the same way as active check results, we need to enable the following option: By default, Nagios treats host results from passive checks as hard results. They have a lot of advantages and some disadvantages. Up To: Contents No software installation. External applications can submit passive service check results to Nagios by writing a PROCESS_SERVICE_CHECK_RESULT external command to the external command file. All other servicemarks and trademarks are the property of their respective owner. Detecting and dealing with state changes is what Nagios is all about. A user [emailprotected] is created in MySQL server. These are examples of the graphs that can be created and embedded using the graph generator in the Graphs tab. The -S option is not working with 2.0 plugins. It can also be used by third-party applications running on different machines to send passive check results to a central Nagios server. NRDP Overview - force.com Learn more. /usr/lib/nagios/plugins/check_nrpe -H 3.6.123.156 -c check_root_home_du. Remember to allow the execution of the script: if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[300,250],'howtoforge_com-box-4','ezslot_6',110,'0','0'])};__ez_fad_position('div-gpt-ad-howtoforge_com-box-4-0'); The result is a text message and an exit code: This step will be the same with your own plugins, and if you download a third-party plugin from the internet as well. 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. Affordable solution to train a team and make them project ready. 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. Nagios check service frequency based on service status, how can execute nagios commands from command line in linux. Nagios also offers a tool for sending passive check results for hosts and services over a network. 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 .

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