Note: A service must be defined in Nagios before you can submit passive check results for it! 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. The check_init_service plugin does not support checking multiple services. Copyright (c) 1999-2014 Nagios Plugin Development Team <devel@nagios-plugins.org> This plugin tests the HTTP service on the specified host. The next parameter specifies the number of seconds after which Nagios should consider the results to be out of date. Remotely monitor servers with the Nagios check_by_ssh plugin How Nagios process handles passive check results can be defined in the main Nagios configuration file. The NRDP addon allows administrators to migrate from using NSCA to NRDP fairly easily. These checks help ensure that the dependency logic is as accurate as possible. This setting is done on all MySQL servers. All of the scripts are located at /etc/nagios-plugins/config/ with the executable files stored at /usr/lib/nagios/plugins/. How to use it? 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. Always remember, prior to reloading Nagios, check that there are no errors in the configuration. this is more along the lines of what i meant. 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. In order to allow remote hosts to send passive check results to the monitoring host, I've developed the NSCA addon. This file location depends on the configuration you've done, in my case it is in /usr/local/nagios/etc/objects/commands.cfg. Difficulties with estimation of epsilon-delta limit proof, The difference between the phonemes /p/ and /b/ in Japanese. An example shell script of how to submit passive service check results to Nagios can be found in the documentation on volatile services. Note: A host must be defined in Nagios before you can submit passive check results for it! Nagios, NagiosXI, Nagios Core, Nagios Logger, Manage Engine, Idera, Quest, Thousand Eyes Idera Suite and Quest, SQL Monitoring Solution Implementation Examples: CPU load, RAID status An snmp system is generally considered to have 3 components: Agents Agents expose management information on a device. This should enable MySQL to listen on all interfaces, as well as accept incoming connections from user nagios at any host. To figure this out I set nagios into debug mode with the configuration like this. # Sample object config file for Nagios : 3 # 4 # Read the documentation for more information on this configuration file. In order to be able to submit passive check results, we need to configure Nagios to allow the sending of passive check results, and set the host objects to accept them. Do roots of these polynomials approach the negative of the Euler-Mascheroni constant? notifications_enabled 0 +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. # Plugin commands (service and host check commands) # Arguments are likely to change between different . In this example we are going to define a service and assign it to localhost, because this check is on Nagios itself. Monitoring Website URL Status Using Nagios check_http - ARKIT You can create a host file inside the server directory of Nagios and mention the host and service definitions. That is superb artile I was looking for! November 2012, by Simon Krenger. As with passive checks of hosts, all that is needed is to enable the global Nagios option to accept passive check results, and also enable this option for each service that should allow the passing of passive check results. How can I get it to work with https with Nagios4 and plugins 2.x? Passive Checks with Nagios ADMIN Magazine Checking NRPE Status In Linux: A Guide To Troubleshooting Issues With Even the location of the plugins directory is in there. I am running into the same problem as David I've: 5 # provided some comments here, but things may not be so clear without further . 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. (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".) When it comes in as a passive check, no state translation is done and Nagios stores the host and all child nodes being down. Nagios server in this example is hosted on 192.168.0.150 and an example client is hosted on IP 192.168.0.200. Minimum number of days a SSL certiface must be valid. Once again, we are dealing with open source software, and Nagios purpose is aimed at monitoring computer systems. http://www.waggy.at/nagios/capture_plugin.htm, Go to your plugin directory - in my example it is, Type you plugin name - in my example it is, now run the full command - (plugin name) -H (hostname) -p (port number), However in this example port number is optional, in your config file which is look something like below (myserver.cfg) and you want to run check_cpu from command line, to check instantly (without GUI green or red), Try this - (plugin full path) - H (servername) -c (checkname). Architect and design WAP data flow using BigData Platform. This requires trying to read the entire disk directly from the block device (such as /dev/sda1) and checking if the attempt has failed. It also defines Nagios user and group under which Nagios instance is running. In such a case, adding a module that reports current utilization along with the OK/WARNING/CRITICAL state to Nagios seems much easier than using active checks for the same job. does the HTML display xx welcome xx? In most cases you'll use Nagios to monitor your hosts and services using regularly scheduled active checks. It can report each problem when accessing the database. An external application checks the status on hosts/services and writes the result to External Command File. Contribute to vishalsingh17/GitiPedia development by creating an account on GitHub. 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. The plugin 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 "stopped" have an OK state). Did any DOS compatibility layers exist for any UNIX-like systems before DOS started to become outmoded? just because i had already looked in the commands.cfg file to figure out which commands were running, but i wanted to know what flags were being set. 5 check_http Command Examples 1. Thanks for contributing an answer to Server Fault! 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. can anyone help me out for this problem:-, Check-Website-Response In the left navigation pane, select "Process Info" and then "Disable Notifications" and "Commit.". What is check_http? The object needs to have the passive_checks_enabled option set to 1 for Nagios to accept passive check results over the command pipe. This command accepts the host name, service description, status code, and the textual output from a check. 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. So in this blog post is all about how I used Hiera to manage the Dev,Test, Prod Stratos environments. To learn more, see our tips on writing great answers. By default, Nagios handles results from active and passive checks differently. Vulnerability Summary for the Week of June 17, 2019 | CISA If an application that resides on the same host as Nagios is sending passive host or service check results, it can simply write the results directly to the external command file as outlined above. Nagios is the most popular tool which is used to monitor hosts and services running in your IT infrastructure. Establish a terminal session to your Nagios XI server and execute the following command: i.e: 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. For example sudo gedit /usr/local/nagios/etc/servers/ubuntu_host.cfg # Ubuntu Host configuration file Nagios provides a sample configuration file, that we will use. Monitoring Log Messages with Nagios Passive Checks | ls -A 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. can nagios adjust its check time based on the status info? Mar 01, 2023 (Heraldkeepers) -- United States, New Jersey- The most recent analysis of the DNS Monitoring Tool market by Infinity Business Insights offers a. The following screenshot shows a complete overview of all the service checks that have been configured so far. Why is there a voltage on my HDMI and coaxial cables? This is very important in situations where a host behind a router is reported to be down because the router is actually down. When new information regarding a service gets passed to Nagios via the external commands pipe, Nagios treats it the same way as if it had been received by an active check. These are examples of the graphs that can be created and embedded using the graph generator in the Graphs tab. 5 check_http examples I wrote a plugin in a bash script to check for current Warnings. If the remote server runs only HTTP and not HTTPS, youll get HTTP CRITICAL Unable to open TCP socket message as shown below. Checking a service using SNMP is not very straight forward, checking a process is the best solution here, please refer to the Process Checks KB article. Nagios also offers another way to work with the statuses of hosts and services. These will come through as an Unconfigured Object initially because Nagios XI has never received a Passive check result for this host/service. 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. }. The application can also periodically let Nagios know if it succeeded in using the database without problems. You can define service execution dependencies that prevent Nagios from checking the status of a service depending on the state of one or more other services. 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. You have entered an incorrect email address! Xmodulo 2021 About Write for Us Feed Powered by DigitalOcean, Creative Commons Attribution-ShareAlike 3.0 Unported License, Monitor whether MySQL is running by checking port, Monitor the availability of certain database. Otherwise we must rely on parsing the # output from the service management tool. busy-beaver.mit.edu The Nagios Service Check Acceptor (NSCA ) addon has historically been the addon of choice for Nagios administrators that need to establish data feeds or passive check transmission between Nagios installations. The object needs to have the passive_checks_enabled option set to 1 for Nagios to accept passive check results over the command pipe. 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. 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. check_http: command not found. How can I manually run a nagios check from the command line? To subscribe to this RSS feed, copy and paste this URL into your RSS reader. To check whether a specific webpage is available, use the -u option as shown below. By default you do not need to change any of the lines in this file and . Usually within a few seconds the full check command pops up and I then kill the while loop and run the check command. When a host is reported to be DOWN as a passive check result, Nagios does not perform a translation from DOWN to UNREACHABLE. For those unfamiliar with Nagios, it is a monitoring system which can execute checks. Testing the Commands from Nagios XI Server Now we will test from the Nagios XI server that the command you just added to the NRPE client on the Linux server is working. As a Cloudera Administrator and Kafka service owner, leading Kafka/flume/ZK services in WAP (Multi DC Environment), Leading TICK Stack (Influxdb) and Grafana along with Administration of ELK Stack (Elasticsearch, Logstash) and Cloudera Clusters with CI/CD approach, Automation. This example is going to restart the crond service as it is unlikely to cause any issues. NRDP has several benefits over NSCA, including: The following is an example of the required configuration for a host that accepts passive checks and has active checks disabled: Configuring services is exactly the same as with hosts. The time performed is specified in seconds. 164060 Nagios HTTP/HTTPS check via wget (with/without Proxy) Check website accessibility by return code and execution time. Use 5 for 5 seconds, 5m for 5 minutes, 5h for 5 hours, 5d for 5 days. Also, MySQL would not let just any host to connect to it. The following is a script that runs the dd system command (visit http://man.linuxquestions.org/index.php?query=dd) to read an entire block device. When services change state too frequently they are considered to be "flapping". Nagios Tutorial for Beginners - TAE - Tutorial And Example Start Nagios Daemon Using nagios -d Typically you would execute "service nagios start" to start the Nagios daemon, which really calls the /etc/rc.d/init.d/nagios script. great! Examples include server load, number of concurrent processes, number of logged in users via NRPE extension. As the Nagios toolsets, including NSCA (Nagios Service Check Acceptor for submitting passive check results to the Nagios core server) and NRPE (Nagios Remote Plugin Executor for accepting active check requests from the Nagios core server and send back the results), were initially only developed for Unix-based and Linux Operating Systems, After defining the command you can associate that command to a service, and then to a host. If you are new to the Nagios network monitoring system, see the resources at the Nagios website. The processing of active and passive check results is essentially identical. How can I manually run a nagios check from the command line? Here is my configuration : ##### # # NAGIOS.CFG - Sample Main Config File for Nagios # # Read the documentation for more information on this configuration # file. NSClient++ includes a service module that can check if a service is running. If I used the first method, I have to keep separate site.pp for each environment. Enter file in which to save the key (/home/nagios/.ssh/id_dsa): Enter passphrase (empty for. Restarting Linux Services with NRPE - force.com Passive service checks are often used to report the results of long lasting tests asynchronously. How to monitor common services with Nagios - Xmodulo I take a slightly more brute-force direction than @Zoredache, I login to the nagios server and do "while true; do ps awwlx | grep NAGIOS_CHECK_NAME; done", while I force a re-check of the service, where NAGIOS_CHECK_NAME is either part of the check name or the IP of the server I am looking for. First, the servers are defined in Nagios. NSClient++ includes a service module that can check if a service is stopped. It says Unknown option specified in config file , check_http -I 10.0.0.76 -p 8192 url=/MYServiceBus/ post= eregi=.Status_Code.0./Status_Code. NRDP Overview - force.com This tutorial was tested using Nagios Core 4.3.4 on Debian 9.2if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[300,250],'howtoforge_com-box-3','ezslot_3',106,'0','0'])};__ez_fad_position('div-gpt-ad-howtoforge_com-box-3-0'); Even though Nagios Exchange has thousands of available plugins to freely download, sometimes the status needed to be checked is very specific for your scenario. Nagios: Disable notifications from command line on Windows/Linux. It says -S is for version. 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 The main Nagios process then handles the check results and takes appropriate action (running event handlers, sending notifications, etc.).