Kaydolmak ve ilere teklif vermek cretsizdir. Otherwise we must rely on parsing the # output from the service management tool. Or you can create a custom variable to store the port number , with your example: The output indicates that it expires in 300 days. Check whether a document is older than x seconds. If I used the first method, I have to keep separate site.pp for each environment. 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. 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. Method 2. Nagios also offers another way to work with the statuses of hosts and services. 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. Define the checks on /etc/nagios/nrpe_local.cfg. It's pretty simple. Follow these steps to install the plugin: Download the plugin. 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. NSClient++ allows you to check multiple services, here is an example that checks for two services that are running. Nagios.cfg is the main configuration file for your Nagios Core. Enjoy unlimited access on 5500+ Hand Picked Quality Video Courses. 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 . 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. This tutorial will cover the process of using some of these scripts for checking common services, such as MySQL, Apache web server, DNS, etc. When Nagios daemon reads external command file, it reads and sends all the passive checks in the queue to process them later. Nevertheless, in response to your comment, I don't think there's an error in that, as Bash variables are untyped. 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. My code is GPL licensed, can I issue a license to have my code be distributed in a specific MIT licensed project? JOB, These are real-time graphs showing things like CPU usage, memory usage, and bandwidth. Default is 80, This will use HTTPS using default 443 port. ##### ##### # # SAMPLE SERVICE CHECK COMMANDS # # These are some example . Nagios can tell what the status of the service is by reading the exit code of the check. I've # provided some comments here, but things may not be so clear without further # explanation, so make sure to read the HTML documentation! It can report each problem when accessing the database. Select check_cluster from the plugin pop-up menu. check_http -H hostname (or) -I ip-address {optional options}. Nagios check service frequency based on service status, how can execute nagios commands from command line in linux. Active checks are initiated by Nagios process and then run on a regular scheduled basis. Consider that you have put your host definitions inside host1.cfg file in /usr/local/nagios/etc/objects directory. Passive checks are initiated and performed by external applications/processes, Passive check results are submitted to Nagios for processing, Asynchronous in nature and cannot be monitored effectively by polling their status on a regularly scheduled basis, Located behind a firewall and cannot be checked actively from the monitoring host. They have a lot of advantages and some disadvantages. This can be done to gather all critical errors to a single, central place. I've deployed a new instance of Nagios on a fresh install of CentOS 7 via the EPEL repository. Now that the syntax is available, TCP port 80 can be checked as follows. Like every Nagios plugin, you will want to check from the command line before adding it to the configuration files. http://exchange.nagios.org/directory/Plugins, linux.about.com/library/cmd/blcmdl1_watch.htm, How Intuit democratizes AI development across teams through reusability. thank you! 13. For HTTPS running on a different port, do the following. I am running into the same problem as David In such cases, only reports regarding hard state changes are propagated across Nagios servers. 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. Here is how it can be done. Would you please be so kind as to help me? 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. Service state changes can also trigger on-demand host checks. Even if its parent host is currently DOWN, the child host state is also stored as DOWN. This plugin uses systemctl is-active command, please check you have systemd. Now let us add check_interval directive. thanks! Force a check and you will see exactly how the command is being run. 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. Agree 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. An example shell script of how to submit passive service check results to Nagios can be found in the documentation on volatile services. (1 + 2 + + 2048), Also note that your debug file will grow quickly and then rotate itself. In other cases, passive checks are the way to go. The scripts stored in /etc/nagios-plugins/config/ can shed some light on the awesome capabilities of Nagios. In this example we are going to define a service and assign it to localhost, because this check is on Nagios itself. The documentation uses the example of: for . 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 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). Simple invoke the command with -s parameter and the name of the service Example of use ./check_service -s ntpd Thank you! Primary Vendor -- Product Description Published CVSS Score Source & Patch Info; akamai -- cloudtest: Akamai CloudTest before 58.30 allows remote code execution. I will leave this script with all the other Nagios plugins inside /usr/local/nagios/libexec/ (This directory may be different depending on your confiugration). Method 3. Nagios' check_ssh (of course) keeps marking the process as critical since it can't connect on that port. It can also be used by third-party applications running on different machines to send passive check results to a central Nagios server. In general, if a check can be done quickly and does not require long running processes, it should definitely be done as an active service. Nagios Core and Nagios XI has a features to monitoring website URL status. Passive checks are also used when configuring distributed or redundant monitoring installations. I've provided some comments here, but things may not be so # clear without further explanation. The default FQDN used for testing is www.google.com, but it can be changed as needed. 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. Another difference is that active checks require much less effort to be set up when compared to passive checks. . To check whether a specific webpage is available, use the -u option as shown below. November 2012, by Simon Krenger. Some of the scripts provided with Nagios are restricted to the local server only. These are executed on regular intervals, as defined by check_interval and retry_interval. I don't know if it's best practice or not , but i would declare count Warnings as an integer variable when doing arithmetic operations. Nagios can tell what the status of the service is by reading the exit code of the check. It will give you all the available options: 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. VS Code extension | 35 comentarios en LinkedIn Detecting and dealing with state changes is what Nagios is all about. This way, the other applications on your Nagios server can report the status of the hosts. 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. For example . 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. /usr/lib/nagios/plugins/check_nrpe -H 3.6.123.156 -c check_root_home_du. In most cases you'll use Nagios to monitor your hosts and services using regularly scheduled active checks. When it comes to checking MySQL, it should be kept in mind that MySQL, by default, listens on only the loopback interface 127.0.0.1. Nagios Core is an Open Source system for monitoring hosts, networks and services. Nagios, NagiosXI, Nagios Core, Nagios Logger, Manage Engine, Idera, Quest, Thousand Eyes Idera Suite and Quest, SQL Monitoring Solution Implementation It is generally recommended to run the Nagios service check scripts in CLI before adding them to Nagios. This is a plugin for Nagios wich you can use to check if a linux service is running. Server Fault is a question and answer site for system and network administrators. 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. A major difference between hosts and services is that service checks differentiate between soft and hard states. 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.
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