Pass the specified string as User Agent in HTTP header. Monitor DNS server with Nagios These will come through as an Unconfigured Object initially because Nagios XI has never received a Passive check result for this host/service. 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. You'll see the following line inside the /etc/rc.d/init.d/nagios script for the Nagios startup: $NagiosBin -d $NagiosCfgFile Nagios XI - SNMP Trap Tutorial - Nagios Support The best answers are voted up and rise to the top, Not the answer you're looking for? Stop once the headers are downloaded. Also, MySQL would not let just any host to connect to it. Nagios server in this example is hosted on 192.168.0.150 and an example client is hosted on IP 192.168.0.200. The time performed is specified in seconds. Yeah, it's totally brute-force, but it works for me. Nagios provides a sample configuration file, that we will use. Hosts and service configurations are the building blocks of Nagios Core. service_description check http://MYIP/test.php 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. JOB, If up-to-date information has been provided by a passive check during this period, then it will not perform active checks. will hold the return value of commands between $( ). Would you please be so kind as to help me? Passive Checks Documentation NCPA - Nagios This requires trying to read the entire disk directly from the block device (such as /dev/sda1) and checking if the attempt has failed. The service check runs in a child process that was fork()ed from the main Nagios daemon. By using this website, you agree with our Cookies Policy. This example is going to restart the crond service as it is unlikely to cause any issues. 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. This means that if Nagios receives a result indicating that a host is DOWN, it assumes that all child hosts are in an UNREACHABLE state. Check whether Apache HTTP is running on a remote server using check_http. From the GroundWork Monitor menu, selecting Configuration > Nagios Monitoring > Services > Service Templates presents the options New, Copy, and Modify. This is because, very often, passive checks are used to report host and service statuses from other Nagios instances. In such a case, checks are done by other programs, and their results are sent to Nagios. Nagios Tutorial for Beginners - TAE - Tutorial And Example We must install this software there to install the "check_nrpe" plugin that we use to perform active checks using the NRPE. Service Checks - Nagios Support Primary Vendor -- Product Description Published CVSS Score Source & Patch Info; akamai -- cloudtest: Akamai CloudTest before 58.30 allows remote code execution. 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. Host is just like a computer; it can be a physical device or virtual. There are many more services in Nagios which can be used to monitor pretty much anything on the running host. Do not wait for whole document body to download. When it comes in as a passive check, no state translation is done and Nagios stores the host and all child nodes being down. How can we prove that the supernatural or paranormal doesn't exist? The following file can be modified to do the job. NSClient++ includes a service module that can check if a service is running. Far better then Nagios documentation. Cached checks will only provide a performance increase if you are making use of service dependencies. 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. }. 5 check_http Command Examples 1. Set enable_notifications=0 in nagios.cfg. 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. In such cases, only reports regarding hard state changes are propagated across Nagios servers. Depending on the status received on hosts and services, appropriate action is taken. The following illustration shows how results from active and passive checks are treated differently by Nagios: In both the cases, a check result stating that the host is down is received by Nagios. Nagios Monitoring Hosts with check_ping - Stack Overflow It will give you all the available options: To allow it to grow bigger before rotating, add more zeroes, for example. Apply these agent configurations After the NRDP installation, install the NCPA. When a host or service is down for a very short duration of time and its status is not known or different from previous one, then soft states are used. hello.. Treat NRPE connection failures as 'UNKNOWN' service state, and don't notify on UNKNOWN services . 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). Base your decision on 2 verified in-depth peer reviews and ratings, pros & cons, pricing, support and more. Method 3. Nagios Plugins does not include a service plugin however the linux-nrpe-agent does provide check_init_service. Hi, this is a fantastic article, i managed to learn how to make plugins myself. Agree # These are some example service check commands. 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. Nagios, NagiosXI, Nagios Core, Nagios Logger, Manage Engine, Idera, Quest, Thousand Eyes Idera Suite and Quest, SQL Monitoring Solution Implementation This command accepts the host name, status code, and the textual output from a check. In an earlier post, I showed how to . Linux Check Service - Nagios Exchange How to handle a hobby that makes income in US. . Check whether Apache HTTPS is running on a remote server using check_http. Manula's Blog: Monitoring a HTTPS URL with Nagios 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. awesome. 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. ##### # # NAGIOS.CFG - Sample Main Config File for Nagios # # Read the documentation for more information on this configuration # file. It looks like that with the default install, theres no configuration set up to tell Icinga where to look for the check_http executable. This article assumes you have a working knowledge of Nagios. November 2012, by Simon Krenger. Restarting Linux Services with NRPE - force.com How to Write a Custom Nagios Check Plugin - HowtoForge Passive service checks are often used to report the results of long lasting tests asynchronously. To check whether a specific webpage is available, use the -u option as shown below. 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 Simple invoke the command with -s parameter and the name of the service Example of use ./check_service -s ntpd Thank you! It is possible to monitor machine metrics, such as disk usage, CPU use, and so on. Nagios check service frequency based on service status, how can execute nagios commands from command line in linux. This way, Nagios can help monitor the accessibility of both MySQL servers and the database stored within the servers. So in this blog post is all about how I used Hiera to manage the Dev,Test, Prod Stratos environments. So I decided to use the second method. Nagios.cfg is the main configuration file for your Nagios Core. The Nagios plugin can be remotely executed on other Linux/Unix machines using NRPE. 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. Consider that you have put your host definitions inside host1.cfg file in /usr/local/nagios/etc/objects directory. As mentioned earlier, Nagios can forgo the actual execution of an on-demand service check if it can use the cached results from a relatively recent service check. Filters such as firewall and TCP wrappers should be used. 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. The object needs to have the passive_checks_enabled option set to 1 for Nagios to accept passive check results over the command pipe. 03-16-2010, 10:31 AM . This is where the location of Nagios log file, status.dat file, lock file and host and services state update interval is defined. 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. However, if there are no jobs to process and the application is not using it, Nagios will not have up-to-date information about the database. Asking for help, clarification, or responding to other answers. check_http -H hostname (or) -I ip-address {optional options}. The figure shown below shows a passive check . 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. Here is the output when the RemoteAccess service was started: Checking if a service is stopped using SNMP is not very straight forward, checking a process is the best solution here, please refer to the Process Checks KB article. How can I manually run a nagios check from the command line?