were used to determine the current service check status (results) The DETAILED INFO section contains an overview of the certificate chain this is used by Nagios for display on the detailed service check-specific page (e.g., shows last check time, frequency, current state, etc) as for the one-line output, this is used by Nagios for text, email and . This will give an idea on whether the execution will be successful and what the output of the script will look like. For our example, we will create a script that checks the stats for any service like mysql, apache etc. Nagios Integration. The following example shows you what things you need to do in order to use the Core Nagios Plugins on the GreenLight appliance. 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. Check status of system services for Linux, FreeBSD, OSX, and AIX. Negation is also possible. About script: Syntax: ./check_service.sh "service_name". I write this script in order to check the status of a service in Linux. This document describes the inbound email commands that are accepted by Nagios XI when it receives an email response to a notification. Next, add the configuration directive extend . One of the ways to achieve that is using servicedependency with "failing" on "OK state" like following: define servicedependency{ host_name hostX service_description ServiceA dependent_host_name hostX dependent_service_description ServiceB execution_failure_criteria o notification_failure_criteria o } generic-service.cfg; localhost.cfg; timeperiods.cfg. This is where the location of Nagios log file, status.dat file, lock file and host and services state update interval is defined. For a full list, . This plugin checks if the site returns a 200 OK and if so, gives exit status 0. The functionality provided is simple, if the process is running the state is OK, if the process is not running the state is CRITICAL (these can be changed, see the Process is NOT running section). Services are those which are used by Nagios to check something about a host. So the idea is that you just configure Nagios to check a particular variable that you have set up on the NRPE side with no arguments. 1. It can test normal (http) and secure (https) servers, follow redirects, search for strings and regular expressions, check connection times, and report on certificate expiration times. sudo apt-get update sudo apt-get install nagios-nrpe-server nagios-plugins. This document describes how to install and configure the NRPE plugin when Nagios is already installed with default parameters (it is assumed that Nagios is installed in the /usr/local/nagios directory, and uses the nagios user to operate). NRPE has 2 sections: For example, I check a login service of a server that's not a Linux box. Nagios can tell what the status of the service is by reading the exit code of the check. 1. To use the SNMP extend command, first copy the check_file.sh script to the remote server. List the directory and you should see check_dns. sudo apt-get update sudo apt-get install nagios-nrpe-server nagios-plugins. Here is another example to check CPU: nagios will indicate warning if the % cpu utilized by any process is greater than 70% and will indicate critical alert if the % cpu is greater that 80% It supports: obtaining metrics for local system resources, such as diskspace, CPU usage, memory consumption, . Step 2 - Install NRPE Client. Submitting Passive Service Check Results From Remote Hosts If an application that resides on the same host as Nagios is sending passive service check results, it can simply write the results directly to the . Service or Daemon Checks. While you can run a check through the API in your browser, you will want to use the check_ncpa.py plugin to run these active checks from your Nagios server to have your results show up in Nagios. Since GreenLight version 2.9.6 you can use a lot of nagios scripts in combination with the Linux Shell Script Sensor. The big benefit of this is you don't need to stress the actual server at all or install NRPE in cases where you need to optimize performance but still want to have a battery of health . It is generally recommended to run the Nagios service check scripts in CLI before adding them to Nagios. On a debian system, a package named nagios-plugins is installed as a dependency when you install nagios3. The scheduler is a component of server part of Nagios. Running an Active Check. Nagios is particularly flexible because its functionality can be extended via easy to write plugins. This definition command is used by check_nt plugin to monitor Windows . Normal_check_interval of 2 would correspond to 60 seconds, etc. use Nagios::Plugin ; Sample script: check_dellomsa. 3. how short is Nagios' patience. Steps To Reproduce The above commands are for Debian based systems. Code: snmpwalk -v 1 -c public 192.168.56.1. if there is no host is defined then define one. Check HTTP. The service check runs in a child process that was fork ()ed from the main Nagios daemon. Check_winservice has also a service snapshot fingerprint capability which may help you to monitor changes on service configurations. Check whether Apache HTTP is running on a remote server using check_http. (Note: THe -C is used for adding the community) Similarly, you can perform SNMP check on other system maintenance tasks such as Disk Usage, RAM usage, System Uptime among others. Running Nagios Check in CLI. This plugin uses systemctl is-active command, please check you have systemd. Once the parameter's been set, restart the NRPE service (service nrpe restart). CHECK_MRPE. Then click Next. Dell iDRAC Server Health Example I've recently added support for monitoring all server health values via SNMP against the iDRAC interface, this is built upon someone else's already-existing idrac check. You can filter services based on name, state or start mode. June 4, 2018. . The only way then to see the trap is to check the Reports sections for . (In this example, the script will print All ok and it will exit with 0, the OK . A note on this installation example. All three of the hosts are set up in Nagios Core, and so are their services. To install NRPE on Redhat based system, visit this tutorial. Nagios plugin to check if a service is running. For example − What version of Nagios and nagios Plugins are you using? You can place it in the directory /usr/bin/, for example. Instead, Nagios will reschedule the service check for the next valid time in the time period. "check_mysql_health" Service Definition # Open the "mysqlmonitoring.cfg" file we had created earlier using the "vi" editor. define command { command_name command_name command_line command_line } Commands include service checks, service notifications, service event handlers, host checks, host notifications, and host event handlers. Nagios is a host and service monitor designed to inform you of network problems before your clients, end-users or managers do. (In this example, the script will print All ok and it will exit with 0, the OK . Total Warnings: 85 Total Errors: 0 Things look okay - No serious problems were detected during the pre-flight check [me@mymachine nagios] service nagios start Starting network monitor: nagios. We're going to add them into a new servicegroup called mailservices. How to use The SSH Wizard. 1. The configuration we've added adds a simple service check definition for an existing host, to check up to three times whether the HTTP daemon on that host is responding to a simple HTTP/1.1 request. Options: -s Specify service name -l List services -o OS type, "linux/osx/freebsd/aix" -u User if you need to ``sudo -u'' for launchctl (def: nagios, osx only) -t Manually specify service management tool (def: autodetect) with status and service e.g. 3. service_description - The brief description of service. Typically when you install NRPE on the remote host, you'll do ./configure without any arguments. Nagios Architecture. This article assumes you have a working knowledge of Nagios. i.e guest/guest. 3. 30 seconds. The NRPE configuration will be where you set up the nitty gritty of what is actually checked. Nagios …. From ArchWiki. Nagios software runs periodic checks on critical parameters of application, network and server resources. It uses systemd. You can configure other MySQL services as well whose information can be found on the website. It can test normal (http) and secure (https) servers, follow redirects, search for strings and regular expressions, check connection times, and . When the service check has completed, the child process will inform the main Nagios process (its parent) of the check results. It also tells us that . Download check_rabbitmq Nagios Plugin. which defines the arguments in between the exclamation marks as in the documentation example you gave. check_service. . 4. check_command - The check command used. Nagios is an open source host, service and network monitoring program. And of course it should work on any distribution based on them. . One of the ways to achieve that is using servicedependency with "failing" on "OK state" like following: define servicedependency{ host_name hostX service_description ServiceA dependent_host_name hostX dependent_service_description ServiceB execution_failure_criteria o notification_failure_criteria o } the time is valid within the time period), the service check is executed. It also defines Nagios user and group under which Nagios instance is running. Simple, and one function only. you have the flexibility of sending the passive check to Nagios with a different hostname. Step 1.2 - Configure NRPE. Enable check_nrpe command arguments. #!/bin/bash # Nagios Plugin Bash Script - check_service.sh # This script checks if program is running # Check for missing parameters if [ [ -z "$1" ]] then echo "Missing parameters! Let's install the NRPE client on your system using the following commands. Nagios Architecture. attach_file. Include below configuration in HOSTNAME.cfg file. Description. Pick one, ie: SNMPv2-MIB::sysContact. I have about 15 other services being checked on this host, but they are . Then nagios immediately (within 10 seconds) displays "No Data from passive check". Now Add the service configuration. Step 1: We have to provide the address of the server we will monitor via SSH. Thanks for that. This is most . Usage: check_website [OPTIONS] {HOSTNAME} {HOSTNAME} host to check (dns/ip) [OPTIONS]: -p PORT port to check (default: 80) -u URL url path (default: /) -f use fake agent (windows xp/firefox 25) -s use SSL via HTTPS (default: 443) -P PROXY proxy access (hostname:port) -w WARNING warning threshold in milliseconds (default: 500) -c CRITICAL critical threshold in milliseconds (default: 2000) -n . This document is intended for use by Nagios Users who want to respond to incidents by email. . External applications can submit passive host check results to Nagios by writing a PROCESS_HOST_CHECK_RESULT external command to the external command file. check_winservice is a Nagios plugin to monitor services on the local Windows system. It can be very easy to make a typing mistake which prevents the Nagios service from starting. Nagios is a very powerful open source tool for monitoring networks and infrastructures. The __HOST__ is a special service name, which represents the host check in Nagios. The scripts are stored in /usr/lib/nagios/plugins/. Where 192.168.1.100 is your Nagios server ip address. Nagios XI - Inbound Email Commands. ! When all you can see of the status of . This Nagios plugin allows monitoring many oracle DB parameters - like tablespaces size, session, process count, SGA pool, etc. Check it out on the author's . It has been designed to run . service nagios restart. The following is the format for defining of a Command −. The number of plugins available on Nagios Exchange and extensions make this tool essential to not just to be reactive but to create workflows and escalations if needed in a matter of minutes. 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. If it doesn't copy correctly for some reason, go into your Nagios server. Nagios' check_ssh (of course) keeps marking the process as critical since it can't connect on that port. Example: ./check_service.sh mysql. As a result, both will start using the check_ssh_load command. The __HOST__ is a special service name, which represents the host check in Nagios. Using check_by_ssh is a convenient and secure way to execute Nagios plugins on remote servers. Step 2 - Install NRPE Client. If not, for example because of a timeout, access denied or 50x error, it will return status 1 or 2. You can create a host file inside the server directory of Nagios and mention the host and service definitions. Nagios service status check. Host is just like a computer; it can be a physical device or virtual. Usually, on a network, a Nagios server is running on a host, and plugins are running on all the remote hosts which should be monitored. The above commands are for Debian based systems. Include below configuration in HOSTNAME.cfg file. I put in ` check_ssh!--host=localhost!--port=xxx22` and nagios will start with service . Examples include server load, number of concurrent processes, number of logged in users via . The main Nagios process then handles the check results and takes appropriate action (running event handlers, sending . if there is no host is defined then define one. In addition, we have to select the Operating System. Nagios executes a command, check_nrpe, to connect to a NRPE service. Note that adjusting this value affects everything that depends on timing.
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