nagios service check example

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). By using this website, you agree with our Cookies Policy. 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. The following file can be modified to do the job. 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. Enter file in which to save the key (/home/nagios/.ssh/id_dsa): Enter passphrase (empty for. 5 check_http examples This setting will expose MySQL to all available interfaces, including WAN. In other cases, passive checks are the way to go. The check_ncpa.py plugin enables Nagios to monitor the installed NCPAs on the hosts. 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. Monitor whether the apache server is available. 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. Here is an example set of passive checks that . The next parameter specifies the number of seconds after which Nagios should consider the results to be out of date. rev2023.3.3.43278. To figure this out I set nagios into debug mode with the configuration like this. Up To: Contents Format is minimum:maximum, Response time in seconds for warning state, Response time in seconds for critical state, Number of seconds to wait before connection times out. Nagios will be configured to monitor SMTP and mail queue of the server. For those unfamiliar with Nagios, it is a monitoring system which can execute checks. 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. service_description check http://MYIP/test.php In an earlier post, I showed how to . It can be used to send results from one Nagios instance to another. Check WMI Plus allows you to check multiple services, here is an example that checks for two services that are running. 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. Primary Vendor -- Product Description Published CVSS Score Source & Patch Info; akamai -- cloudtest: Akamai CloudTest before 58.30 allows remote code execution. Add the file to the standard Nagios Core location, /usr/local/nagios/libexec. Services are checked by the Nagios daemon: At regular intervals, as defined by the check_interval and retry_interval options in your service definitions. On a finishing note, Nagios can monitor many other sectors of a network. This user is then granted all permission to all databases and will be used for monitoring. sudo usermod -aG docker kifarunix. Nagios is the most popular tool which is used to monitor hosts and services running in your IT infrastructure. Nagios check service frequency based on service status, how can execute nagios commands from command line in linux. Often, you have situations where other applications can report if a certain service is working properly or not. Learn more. will hold the return value of commands between $( ). How Nagios process handles passive check results can be defined in the main Nagios configuration file. 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. Here is how it can be done. The object needs to have the passive_checks_enabled option set to 1 for Nagios to accept passive check results over the command pipe. An example shell script of how to submit passive service check results to Nagios can be found in the documentation on volatile services. 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. Default is HTTP/1. Allow Nagios server to run commands on the client by adding it to the allowed_hosts entry in /etc/nagios/nrpe.cfg. host_name Server01 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 documentation uses the example of: for . This can cause problems if you are submitting passive checks from a remote host or you have a distributed monitoring setup where the parent/child host relationships are different. Nevertheless, in response to your comment, I don't think there's an error in that, as Bash variables are untyped. Hi, this is a fantastic article, i managed to learn how to make plugins myself. Nagios: Disable notifications from command line on Windows/Linux. Even if its parent host is currently DOWN, the child host state is also stored as DOWN. Enjoy unlimited access on 5500+ Hand Picked Quality Video Courses. To turn on everything you want to set debug_level=4095. It essentially does the same thing as a debug level of 2048, but can be used on a per-plugin basis. If youve installed Nagios from source, check_httpd command will be located in the /usr/local/nagios/libexec directory. The files and information on this site are the property of their respective owner(s). Service state changes can also trigger on-demand host checks. Nagios Core is an Open Source system for monitoring hosts, networks and services. The check_init_service plugin does not support checking multiple services. (1 + 2 + + 2048), Also note that your debug file will grow quickly and then rotate itself. Nagios understands the following exit codes: These are executed on regular intervals, as defined by check_interval and retry_interval. It says -S is for version. The application can also periodically let Nagios know if it succeeded in using the database without problems. Next, update the remote Docker daemon DNS details on your hosts file if there is no local DNS; sudo tee -a "192.168.59.48 docker01.kifarunix.com docker01" >> /etc/hosts. 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. Active checks can be used to "poll" a device or service for status information every so often. As with submitting host check results, it is worth mentioning that Nagios will take some time to process passive check results as they are polled periodically from the external commands pipe. The host or the services will be tested again and again till the time the status is permanent. Nagios, the Nagios logo, and Nagios graphics are the servicemarks, trademarks, or registered trademarks owned by Nagios Enterprises. The following screenshot shows a complete overview of all the service checks that have been configured so far. They have a lot of advantages and some disadvantages. Here is my configuration : Using Python Automation to interact with network devices [Tutorial], OpenCV: Detecting Edges, Lines, and Shapes. There are many more services in Nagios which can be used to monitor pretty much anything on the running host. This defines that check_nrpe is the command and check_root_home_du is the value of $ARG1$. NPCA includes a service module that can check if a service is stopped. If you would like to disable passive checks for just a few hosts or services, use the passive_checks_enabled directive in the host and/or service definitions to do so. We make use of First and third party cookies to improve our user experience. How to Install Nagios? It also defines Nagios user and group under which Nagios instance is running. Detecting and dealing with state changes is what Nagios is all about. What you are doing down is sending a Passive check result for the service SNMP Traps - Users for the host CentOS. Can i specify what a valid response is, i.e. 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. In the Select resource macro: section, select USER1. We must install this software there to install the "check_nrpe" plugin that we use to perform active checks using the NRPE. In order to use them, the host needs to be configured to accept passive checks results. This is very important in situations where a host behind a router is reported to be down because the router is actually down. 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. This example is going to restart the crond service as it is unlikely to cause any issues. Please refer tohttp://tldp.org/LDP/abs/html/untyped.html, hi! Mar 01, 2023 (Heraldkeepers) -- United States, New Jersey- The most recent analysis of the DNS Monitoring Tool market by Infinity Business Insights offers a. On any device & OS. This setting is done on all MySQL servers. 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}. Let us assume that the following custom application is also running in the network, listening on a particular port. Thanks for contributing an answer to Server Fault! So I decided to use the second method. I've provided some comments here, but things may not be so # clear without further explanation. There are also different types of checks including external applications or devices that want to report information directly to Nagios. This plugin uses systemctl is-active command, please check you have systemd. 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. With a little tweaking, Nagios can help monitor this application port as well. Are there tables of wastage rates for different fruit and veg? Nagios can tell what the status of the service is by reading the exit code of the check. does the HTML display xx welcome xx? Note: Certain nodes in the above example have combined check results, such as memory/virtual, memory/swap, and processes. The plugins can be in any language, Nagios only cares They can be the following: 0: OK A good example might be running a check that takes several hours to completein this case, it does not make sense to raise the global service_check_timeout option, but rather to schedule these checks outside of Nagios and only report the results back to it. After installing nagios and nagios-plugins-all (via yum), I've c. 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. 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). Service or Daemon checks are system processes that run in the background, usually configured to start when the system boots. See Also: Active Checks, Service Checks, Host Checks. By default, Nagios handles results from active and passive checks differently. Select check_cluster from the plugin pop-up menu. }. Nagios also offers a way of combining the benefits of both active and passive checks. More information on how this works can be found here. For example sudo gedit /usr/local/nagios/etc/servers/ubuntu_host.cfg # Ubuntu Host configuration file 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. Nagios executes event handlers to handle hard states. I will use a simple example. 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. Monitoring Website URL Status These checks help ensure that the dependency logic is as accurate as possible. From the GroundWork Monitor menu, selecting Configuration > Nagios Monitoring > Services > Service Templates presents the options New, Copy, and Modify. This is a plugin for Nagios wich you can use to check if a linux service is running. The Nagios server is running on Ubuntu. Do whatever you want with a Deploying Nagios Monitoring Services on Secured Red Hat Enterprise Linux 3 Environment: fill, sign, print and send online instantly. 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 . In this tutorial, the following three servers are being used. The daemon will listen for connections from remote clients, perform some basic validation on the results being submitted, and then write the check results directly into the external command file (as described above). The scripts stored in /etc/nagios-plugins/config/ can shed some light on the awesome capabilities of Nagios. Is it possible to check a web page through an authenticated proxy server? Affordable solution to train a team and make them project ready. It is called NSCA (Nagios Service Check Acceptor). It has been designed to run . /usr/lib/nagios/plugins/check_nrpe -H 3.6.123.156 -c check_root_home_du. use generic-service ; Name of service template to use # These are some example service check commands. Passive checks are performed by external processes and the results are given back to Nagios for processing. Do not wait for whole document body to download. Usually within a few seconds the full check command pops up and I then kill the while loop and run the check command. 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). Service - Started Check to see if a service is started. Nagios will ignore all check results for hosts that had not been configured before it was last (re)started. You do this with nagios -v command as root: Ensure it returns 0 errors and 0 warnings and proceed to reload the service: After reloading the service, you will see the associated check in the localhost. NSCA stands for Nagios Service Check Acceptor. Check HTTP Check whether Apache HTTP is running on a remote server using check_http. More information on the NSCA addon can be found here. When a URL is redirected, use this to either follow the URL, or send ok, warning, or critical notification, Specify the minimum and maximum page size expected in bytes. check_http -H hostname (or) -I ip-address {optional options}. By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. In many cases, the time taken is not enough, as some checks need to be performed over a longer period of time to have satisfactory results. November 2012, by Simon Krenger. ##### ##### # # SAMPLE SERVICE CHECK COMMANDS # # These are some example . Nagios will still handle all notifications, event handlers, and dependencies between hosts and services. 2022 Company, Inc. All rights reserved. You need to add the full path to it in the check_command. Far better then Nagios documentation. (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".) My code is GPL licensed, can I issue a license to have my code be distributed in a specific MIT licensed project? To subscribe to this RSS feed, copy and paste this URL into your RSS reader. can nagios adjust its check time based on the status info? Would you please be so kind as to help me? I am gettinr this error in nagios3. Enable and restart the nrpe service: [user@mon]# systemctl enable nrpe [user@mon]# systemctl restart nrpe. Does anyone have a working example of a dependencies.cfg file for nagios? Services are those which are used by Nagios to check something about a host. I'd like to use the command line to run that particular check and get the output. In such a case, checks are done by other programs, and their results are sent to Nagios. Agree 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). Nagios understands the following exit codes: A program can be written in any language to work as a Nagios check plugin. Once again, we are dealing with open source software, and Nagios purpose is aimed at monitoring computer systems. +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. Then we are removing spaces using sed and finally cut the appropriate field using cut, i this case field 5 is what we want. External applications can submit passive host check results to Nagios by writing a PROCESS_HOST_CHECK_RESULT external command to the external command file. 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. It allows to configure alerts and has different states for them. 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. Now in your configuration for checks for a host you can create the following service check. check_http plugin is used to verify the status of HTTP server (or HTTPS) that is running on a remote host. 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 same queue that is used for storing results from active checks is also used to store the results from passive checks. 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. check_http: command not found. How to use it? For any support related questions please visit the Nagios Support Forums at: Article Number: 775 | Rating: Unrated | Last Updated by. Also, MySQL would not let just any host to connect to it. Now that the syntax is available, TCP port 80 can be checked as follows. If you preorder a special airline meal (e.g. 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. 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. An external application checks the status of a host or service. Another difference is that active checks require much less effort to be set up when compared to passive checks. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy.

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