nagios-check-website - Nagios Exchange Here is an example set of passive checks that . The processing of active and passive check results is essentially identical. hello.. this is THE MOST comprehensive and straight forward turorial I've seen. To monitor hosts and services running on remote machines, Nagios executes plugins and tells what information to collect. Nagios Turn Off All Notifications | 6 Methods Revealed 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. 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. It is a protocol that is used in reverse of the other common Nagios protocol NRPE. When Nagios daemon reads external command file, it reads and sends all the passive checks in the queue to process them later. Is there a more efficient way to do this? 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! Nagios also offers another way to work with the statuses of hosts and services. It is called NSCA (Nagios Service Check Acceptor). For example, to set up a very similar service, all we need to do is to use the same parameters as those for the hosts: In this case, Nagios will never perform any active checks on its own and will only rely on the results that are passed to it. Some methods support checking multiple services at once. Submitting Passive Check Results From Remote Hosts. >Mainly Focus on Kafka and Cloudera services, Cluster . /usr/local/nagios/libexec/check_ping -H 192.168.1.2 -w 100.0,90% -c 200.0,60% .use: nagios-plugins/check_service.sh at master - GitHub The above definitions add a host called ubuntu_host and defines the services which will run on this host. What you are doing down is sending a Passive check result for the service SNMP Traps - Users for the host CentOS. Allow Nagios server to run commands on the client by adding it to the allowed_hosts entry in /etc/nagios/nrpe.cfg. Thanks for contributing an answer to Server Fault! http://exchange.nagios.org/directory/Plugins, linux.about.com/library/cmd/blcmdl1_watch.htm, How Intuit democratizes AI development across teams through reusability. One of the problems is that such checks can take only a couple of seconds to completea typical timeout for an active check to complete is 10 or 30 seconds. Even the location of the plugins directory is in there. Making statements based on opinion; back them up with references or personal experience. Monitor DNS server with Nagios If you want know more, just read and play with: I'm new to shell and would like to understand and adapt your script would you comment on why this particular adaptation wont work (results unknown - 0 regardless of input parameter sent by the user), countWarnings=$(/usr/local/nagios/bin/nagiostats | grep "Ok/Warn/Unk/Crit:" | sed 's/[[:space:]]//g' | cut -d"/" -f5), echo "example: plugin.sh minimal_counter_for_warning_alert counter_for_critical_alert", if (($warn<=$countWarnings ||$countWarnings==0)); then, echo "OK - $countWarnings services in Warning state", elif (($warn<$countWarnings && $countWarnings<=$crit)); then, echo "WARNING - $countWarnings services in Warning state", echo "CRITICAL - $countWarnings services in Warning state", [emailprotected]:/usr/local/nagios/libexec$ echo $(/usr/local/nagios/bin/nagiostats | grep "Ok/Warn/Unk/Crit:" | sed 's/[[:space:]]//g' | cut -d"/" -f5). These checks help ensure that the dependency logic is as accurate as possible. (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".) 13. The key features of passive checks are as follows: The major difference between active and passive checks is that active checks are initiated and performed by Nagios, while passive checks are performed by external applications. Apply these agent configurations After the NRDP installation, install the NCPA. Line 1 ##### 2 # Sample object config file for Nagios : 3 # 4 # Read the documentation for more information on this configuration file. Unlike active checks, Nagios will not take network topology into consideration by default. Submitting passive host check results to Nagios requires sending a command to the Nagios external command pipe. Nagios Monitoring Hosts with check_ping - Stack Overflow The check logic inside Nagios process starts the Active check. Nagios can be used to monitor Apache web server as well. This task is really easy as Nagios has a built-in command for this. command line output while running with -S is check_http: Invalid option SSL is not available, Next post: UNIX / Linux whatis Command Examples, Previous post: UNIX / Linux split Command Examples, Home | Linux 101 Hacks Table of Contents | Contact | Email | RSS | Copyright 20092022 Ramesh Natarajan All rights reserved | Terms of Service, host name of the server where HTTP (or HTTPS) daemon is running, Port number where HTTP server runs. It is vital to make sure only legitimate networks have access to the database. If the remote server runs only HTTP and not HTTPS, youll get HTTP CRITICAL Unable to open TCP socket message as shown below. 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. The object file localhost.cfg allows for parameters to be passed to check_ssh. The following screenshot shows a complete overview of all the service checks that have been configured so far. Does a summoned creature play immediately after being summoned by a ready action? Let us assume that the following custom application is also running in the network, listening on a particular port. Hosts and service configurations are the building blocks of Nagios Core. This requires trying to read the entire disk directly from the block device (such as /dev/sda1) and checking if the attempt has failed. Use 5 for 5 seconds, 5m for 5 minutes, 5h for 5 hours, 5d for 5 days. The default FQDN used for testing is www.google.com, but it can be changed as needed. @sunardo I just ran into this exact same thing. 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. Note: A service must be defined in Nagios before you can submit passive check results for it! 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. 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. 1. An example shell script of how to submit passive service check results to Nagios can be found in the documentation on volatile services. Nagios check_udp_ports returning critical: result to scheduled check, runs fine manually, Nagios - check procs and --metric=elapsed on the same service. This setting will expose MySQL to all available interfaces, including WAN. Minimum number of days a SSL certiface must be valid. Complete a blank sample electronically to 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). Nagios check_dns / check_ip Example - Nagios Exchange See Also: Active Checks, Host Checks, Check Scheduling, Predictive Dependency Checks. /usr/lib/nagios/plugins/check_nrpe -H 3.6.123.156 -c check_root_home_du. To figure this out I set nagios into debug mode with the configuration like this. This article assumes you have a working knowledge of Nagios. 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. 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. There are no attachments for this article. As mentioned earlier, server-2 has postfix mail server set up on it. These are examples of the graphs that can be created and embedded using the graph generator in the Graphs tab. Do roots of these polynomials approach the negative of the Euler-Mascheroni constant? awesome. Contribute to vishalsingh17/GitiPedia development by creating an account on GitHub. Force a check and you will see exactly how the command is being run. For HTTPS running on a different port, do the following. 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. More information on dependencies can be found here. -c 7 -w 5 -v. Any pointer if I am missing anything but obvious. Use Puppet environments. These are executed on regular intervals, as defined by check_interval and retry_interval. The NRDP addon allows administrators to migrate from using NSCA to NRDP fairly easily. All other servicemarks and trademarks are the property of their respective owner. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. 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. In order to allow remote hosts to send passive check results to the monitoring host, I've developed the NSCA addon. Configuring a Nagios Monitoring System | Scaleway Documentation We make use of First and third party cookies to improve our user experience. debug_level=2048 With nagios in debug mode I simply tail the debug_log file debug_file=/var/log/nagios3/nagios.debug. 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. Enable and restart the nrpe service: [user@mon]# systemctl enable nrpe [user@mon]# systemctl restart nrpe. Services are checked by the Nagios daemon: At regular intervals, as defined by the check_interval and retry_interval options in your service definitions. Nagios' check_ssh (of course) keeps marking the process as critical since it can't connect on that port. check_http plugin is used to verify the status of HTTP server (or HTTPS) that is running on a remote host. More information on the flap detection logic can be found here. Mar 01, 2023 (Heraldkeepers) -- United States, New Jersey- The most recent analysis of the DNS Monitoring Tool market by Infinity Business Insights offers a. This website is made possible by minimal ads and your gracious donation via PayPal or credit card. This can be done to gather all critical errors to a single, central place. In other cases, passive checks are the way to go. 2022 Company, Inc. All rights reserved. We make use of First and third party cookies to improve our user experience. Tanuj Bansal - Data Analyst - Kafka Service Owner and Cloudera Nagios server in this example is hosted on 192.168.0.150 and an example client is hosted on IP 192.168.0.200. 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 .. Now send a trap and see how the service appears as in Nagios XI. 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. 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. TRUST_EXIT_CODE=0 usage () { cat <<EOF The NSCA addon consists of a daemon that runs on the Nagios hosts and a client that is executed from remote hosts. I've # provided some comments here, but things may not be so clear without further # explanation, so make sure to read the HTML documentation! Service Checks - Nagios Support If up-to-date information has been provided by a passive check during this period, then it will not perform active checks. Examples: CPU load, RAID status An snmp system is generally considered to have 3 components: Agents Agents expose management information on a device. The best answers are voted up and rise to the top, Not the answer you're looking for? It is possible to configure Nagios so that it will receive status information sent over a command pipe. These checks are useful when you cannot monitor hosts/services on a regular basis. Now that the syntax is available, TCP port 80 can be checked as follows. It essentially does the same thing as a debug level of 2048, but can be used on a per-plugin basis. The -S option is not working with 2.0 plugins. How to Install Nagios? How to install and configure Nagios Core. Hi, this is a fantastic article, i managed to learn how to make plugins myself. An external application checks the status on hosts/services and writes the result to External Command File. This tutorial will cover the process of using some of these scripts for checking common services, such as MySQL, Apache web server, DNS, etc. Passive Checks - Nagios In this tutorial, we'll install Nagios on an Ubuntu 19.10 server, but these steps should work on any Debian-based distro. To turn on everything you want to set debug_level=4095. The __HOST__ is a special service name, which represents the host check in Nagios. NSClient++ includes a service module that can check if a service is stopped. Primary Vendor -- Product Description Published CVSS Score Source & Patch Info; akamai -- cloudtest: Akamai CloudTest before 58.30 allows remote code execution. Check HTTPS Check whether Apache HTTPS is running on a remote server using check_http. you have the flexibility of sending the passive check to Nagios with a different hostname. rev2023.3.3.43278. After defining the command you can associate that command to a service, and then to a host. 164060 Nagios HTTP/HTTPS check via wget (with/without Proxy) Check website accessibility by return code and execution time. Learn more about Stack Overflow the company, and our products. That is superb artile I was looking for! Using Python Automation to interact with network devices [Tutorial], OpenCV: Detecting Edges, Lines, and Shapes. Up To: Contents Nagios SNMP checks - The Noc Cave