nagios service check example nagios service check example

Nagios Tutorial for Beginners - TAE - Tutorial And Example Repeat this procedure for each Ceph plug-in applicable to the node. Passive Checks Documentation NCPA - Nagios My code is GPL licensed, can I issue a license to have my code be distributed in a specific MIT licensed project? Last updated on September 22, 2020 by Sarmed Rahman. 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. Nagios's primary mode of "service checking" is called an active check. Mar 01, 2023 (Heraldkeepers) -- United States, New Jersey- The most recent analysis of the DNS Monitoring Tool market by Infinity Business Insights offers a. For example sudo gedit /usr/local/nagios/etc/servers/ubuntu_host.cfg # Ubuntu Host configuration file You can create a host file inside the server directory of Nagios and mention the host and service definitions. To turn on everything you want to set debug_level=4095. This is very important in situations where a host behind a router is reported to be down because the router is actually down. . Nagios Core is an Open Source system for monitoring hosts, networks and services. Allow Nagios server to run commands on the client by adding it to the allowed_hosts entry in /etc/nagios/nrpe.cfg. These checks help ensure that the dependency logic is as accurate as possible. If up-to-date information has been provided by a passive check during this period, then it will not perform active checks. Nagios check_udp_ports returning critical: result to scheduled check, runs fine manually, Nagios - check procs and --metric=elapsed on the same service. define service{ Follow Up: struct sockaddr storage initialization by network format-string, Identify those arcade games from a 1983 Brazilian music video. On the client host that you want to use to connect to remote Docker daemon, generate SSH keys from your user account; ssh-keygen. 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). 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. So if you wanted to run the check_http check from the CLI, you would run ./check_http -I, where the I flag stands for the IP Address (, I struggled to get this to work, not sure what i was doing wrong (noob) but the debug_level trick worked for me :). checkcommands.cfg in branches/locker-dev/noc/nagios - scripts.mit.edu Far better then Nagios documentation. 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. Nagios stores the status of the hosts and services it is monitoring to determine if they are working properly or not. Check whether Apache HTTP is running on a remote server using check_http. Examples: CPU load, RAID status An snmp system is generally considered to have 3 components: Agents Agents expose management information on a device. Nagios can monitor different mail server components like SMTP, POP, IMAP and mailq. All of the scripts are located at /etc/nagios-plugins/config/ with the executable files stored at /usr/lib/nagios/plugins/. I Have problem with the check_http when I try ur command test , I have the next message : 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. When services change state too frequently they are considered to be "flapping". The above definitions add a host called ubuntu_host and defines the services which will run on this host. Testing the Commands from Nagios XI Server Now we will test from the Nagios XI server that the command you just added to the NRPE client on the Linux server is working. 2. b-b.mit.edu 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. Can I tell police to wait and call a lawyer when served with a search warrant? The -S option is not working with 2.0 plugins. /usr/nagios/libexec/check_http .. Base your decision on 2 verified in-depth peer reviews and ratings, pros & cons, pricing, support and more. Thank you for any assistance you can provide. 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. This way, Nagios can help monitor the accessibility of both MySQL servers and the database stored within the servers. A good example would be a server that is a part of an application, processing job queues using a database. No paper. 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. Up To: Contents By default, Nagios handles results from active and passive checks differently. 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}. Hello, ask a question, check_http detect page size, page size detection value changes again, the alarm. This directive is used to perform scheduled checks of the hosts for the number you set; by default it is in minutes. Filters such as firewall and TCP wrappers should be used. 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. Fillable Online Deploying Nagios Monitoring Services on Secured Red Hat Based on the condition checked, the plugin can make Nagios aware of a malfunctioning service. Also, depending on your configuration you should add this last file to the main file (/usr/local/nagios/etc/nagios.cfg): Check the configuration and, if no errors or warnings, reload the service: And now you have a new custom check on a host: Nagios has a huge library of plugins available at Nagios Exchange. Service Checks - Nagios Support Did any DOS compatibility layers exist for any UNIX-like systems before DOS started to become outmoded? Nagios Plugins does not include a service plugin however the linux-nrpe-agent does provide check_init_service. The nature of simulating nature: A Q&A with IBM Quantum researcher Dr. Jamie We've added a "Necessary cookies only" option to the cookie consent popup. In other cases, passive checks are the way to go. Enjoy unlimited access on 5500+ Hand Picked Quality Video Courses. Here is how it can be done. In most cases you'll use Nagios to monitor your hosts and services using regularly scheduled active checks. Detecting and dealing with state changes is what Nagios is all about. 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. How to install and configure Nagios Core. In this way, NSCA communication sent over the Internet is more secure. Asking for help, clarification, or responding to other answers. 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. 28. In such a case, adding a module that reports current utilization along with the OK/WARNING/CRITICAL state to Nagios seems much easier than using active checks for the same job. More information on the NSCA addon can be found here. It says -S is for version. # These are some example service check commands. ##### # Sample object config file for Nagios # # Read the documentation for more information on this configuration file. Treat NRPE connection failures as 'UNKNOWN' service state, and don't notify on UNKNOWN services . The Nagios passive check technique described in this article uses Nagios Service Check Acceptor (NSCA) . Configuring a Nagios Monitoring System | Scaleway Documentation Default is 80, This will use HTTPS using default 443 port. From the GroundWork Monitor menu, selecting Configuration > Nagios Monitoring > Services > Service Templates presents the options New, Copy, and Modify. Often, there are situations where active checks obviously fit better. Edit the /usr/local/nagios/etc/objects/localhost.cfg file and add the following block: Now we are all set, the only thing pending is reloading Nagios to read the configuration files again. NSClient++ allows you to check multiple services, here is an example that checks for two services that are running. Ensure that the local file and .d directory are included in the main configuration file with: Now check one of the previously defined NRPE commands from the Nagios server: Note that the check_users NRPE command was defined in the /etc/nagios/nrpe_local.cfg file to run /usr/lib/nagios/plugins/check_users -w 5 -c 10. 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. NRDP Overview - force.com 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. For example, a plugin which returns a WARNING state will cause a service to have a WARNING state. Select check_cluster from the plugin pop-up menu. However, applications on remote hosts can't do this so easily. The Nagios plugin can be remotely executed on other Linux/Unix machines using NRPE. For example: nagios@nagiosserver:~/ > $ ssh-keygen -t dsa Generating public/private dsa key pair. 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. Note that all the configuration in this section is done on the client to be checked, not in the nagios server. 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. Passive service checks are often used to report the results of long lasting tests asynchronously. The Nagios server is running on Ubuntu. # yum -y install httpd gcc glibc glibc-common gd gd-devel openssl-devel net-snmp net-snmp-devel net-snmp-utils snmp* bc xinetd make wget (php php-mysql) . Periodically when these checks are processed, notifications or alerts are sent depending on the information in check result. 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). 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). Each of these options opens the Manage Service Template screen.The New option will have no pre-selected directive values, Copy lets you create a new template based on an existing templates properties, and Modify enables the editing of an . When Nagios plans and receives results from active checks, it takes the actual network topology into consideration and performs a translation of the states based on this. Nagios will still handle all notifications, event handlers, and dependencies between hosts and services. $ check_http -H 192.168.1.50 HTTP OK HTTP/1.1 200 OK - 332 bytes in 0.004 seconds |time=0.004144s;;;0.000000 size=332B;;;0 2. Now in your configuration for checks for a host you can create the following service check. Ali Sabry en LinkedIn: Code-GPT is an extension for VS Code that does the HTML display xx welcome xx? For Nagios to perform active checks when there is no up-to-date result from passive checks, you need to set the check_freshness directive to 1 and set freshness_threshold to the time period after which a check should be performed. These state changes result in different state types (HARD or SOFT), which can trigger event handlers to be run and notifications to be sent out. This will give an idea on whether the execution will be successful and what the output of the script will look like. i'm very new on that kind of progamming what does this line ", " means i really want to lear some but i need help please helpme. Remotely monitor servers with the Nagios check_by_ssh plugin How to handle a hobby that makes income in US. nagiostats provides statistics of which only the part `Services Ok/Warn/Unk/Crit: 8 / 0 / 0 / 0` are interesting to us, so we are using grep to extract this line. You'll see the following line inside the /etc/rc.d/init.d/nagios script for the Nagios startup: $NagiosBin -d $NagiosCfgFile Latest Insight on DNS Monitoring Tool Market Outlook 2023 to 2030 With Does a summoned creature play immediately after being summoned by a ready action? So in this blog post is all about how I used Hiera to manage the Dev,Test, Prod Stratos environments. The host status code should be 0 for an UP state, 1 for DOWN and 2 for an UNREACHABLE state. It's pretty simple. 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. These plugin states directly translate to service states. Puppet nagios check disk example - United States Tutorials Step-by-step 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. A command to submit passive checks is PROCESS_SERVICE_CHECK_RESULT (visit http://www.nagios.org/developerinfo/externalcommands/commandinfo.php?command_id=114). Making statements based on opinion; back them up with references or personal experience. Nagios: Simple Oracle Check. Hi, this is a fantastic article, i managed to learn how to make plugins myself. For any support related questions please visit the Nagios Support Forums at: Article Number: 775 | Rating: Unrated | Last Updated by. In order to use them, the host needs to be configured to accept passive checks results. 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.