Troubleshoot Instance Launching Errors in the Dashboard, 4.6. Data Processing (sahara) Log Files, 1.1.6. At a minimum, the following must be done: If the OpenStack cloud includes distributed hosts: /etc/nagios/objects/ObjectsDir/ObjectsFile.cfg. My issue is that I then want to be able to override these service definitions which have been included in the host, from the hostgroup. Troubleshoot Identity Client (keystone) Connectivity Problems, 4.3. Database as a Service (trove) Log Files, 1.1.7. I find it very strange that there are entries in /usr/bin that normal users are not allowed to run? Increased server, services, and application availability, Fast detection of network outages and protocol failures. Thanks for contributing an answer to Server Fault! 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. Viewed 12510 times since Tue, Nov 14, 2017, Viewed 18313 times since Tue, Nov 28, 2017, Viewed 17861 times since Wed, Nov 15, 2017, Viewed 6949 times since Tue, Nov 28, 2017, Viewed 41367 times since Mon, Nov 13, 2017, Viewed 16145 times since Tue, Nov 28, 2017, Viewed 29720 times since Sun, Nov 12, 2017, Viewed 15533 times since Mon, Nov 20, 2017, Viewed 11868 times since Wed, Nov 29, 2017, Viewed 69092 times since Thu, Nov 9, 2017. Knowledge Base It was installed on Debian by using 'apt-get install nagios-plugins', and on Redhat/Fedora via RPM, such as nagios-plugins-2.2.1-4git.fc26.aarch64.rpm. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. Why in the Sierpiski Triangle is this set being used as the example for the OSC and not a more "natural"? You can modify the definitions in these and other definitions to suit your needs better if you'd like. Arranging it this way allows me to only add custom services, and service checks that aren't the norm in the host definition. The "-r 1" option tells the check_snmp plugin to return an OK state if "1" is found in the SNMP result (1 indicates an "up" state on the port) and CRITICAL if it isn't found. with the check_snmp plugin and bandwidth (if you're using MRTG) with the check_mrtgtraf plugin. However, in the end, that's what I did - and it works. So for example, I'd like to have a host in the linux-server host group, which inherits several services (SSH, Disk, PING, etc), but for specific services I want to override with their own unique values, define a service specific to that host, with custom values. In addition, there are a number of points to review for optimal Nagios placement: NRPE (Nagios Remote Plugin Executor) plugins are compiled executables or scripts that are used to check the status of a hosts service, and report back to the Nagios service. For example, the check_ping plugin might return a line of text like the following: With this simple type of output, the entire line of text is available in the $HOSTOUTPUT$ or $SERVICEOUTPUT$ macros (depending on whether this plugin was used as a host check or service check). I just mis-typed it here, sorry. By using decimals in your check_interval I have a feeling it's throwing the math off. Why does Acts not mention the deaths of Peter and Paul? Shared Filesystem Service (manila) Log Files, 1.1.14. snmpwalk -v1 -c public 192.168.1.253 -m ALL .1. Nagios provides complete monitoring of Ping including reachability and packet loss. Plugin performance data is external data specific to the plugin used to perform the host or service check. What are the arguments for/against anonymous authorship of the Gospels, Generic Doubly-Linked-Lists C implementation. What are the arguments for/against anonymous authorship of the Gospels, Embedded hyperlinks in a thesis or research paper. since there is no predefined argument to specify the port, like --port=$ARG1$ in the definition, but only a generic place holder. It will have quite a lot of load on the system as well. Now you can add some service definitions (to the same configuration file) to monitor different aspects of the switch. - basically any type of metric that the plugin is measuring when it executes. Did the Golden Gate Bridge 'flatten' under the weight of 300,000 people in 1987? host_name server1. nagios (Last Notification: N/A (notification 0)). This means if the check_ping does not get a result in 10 seconds, the command will timeout. Monitoring Using the Telemetry Service", Expand section "3. Which was the first Sci-Fi story to predict obnoxious "robo calls"? Asking for help, clarification, or responding to other answers. Start here for a quick overview of the site, Detailed answers to any questions you might have, Discuss the workings and policies of this site. Nagios is designed to allow plugins to return optional performance data in addition to normal status data, as well as allow you to pass that performance data to external applications for processing. However, I'd recommend waiting until you're more familiar with configuring Nagios Core before doing so. Nagios servers may receive a considerable amount of network traffic, resulting in resource contention. Keep your systems secure with Red Hat's specialized responses to security vulnerabilities. You can have Nagios write all host and service performance data directly to text files using the host_perfdata_file and service_perfdata_file options. If this is the *first* switch you're monitoring, you can simply modify the sample service definition in switch.cfg. On the remote machine, and as the root user, execute the following: After the installation, you can view all available plugins in the /usr/lib64/nagios/plugins/ directory. What is scrcpy OTG mode and how does it work? If additional machines are being used in the cloud, in addition to the host on which Nagios is installed, they must be made known to Nagios by configuring them in an objects file: In the file, specify a host section for each machine on which an OpenStack service is running and should be monitored: In the /etc/nagios/nagios.cfg file, under the OBJECT CONFIGURATION FILES section, specify the following line: To monitor remote services, you must define those services in a new file; in this procedure, /etc/nagios/objects/services.cfg: In the /etc/nagios/objects/commands.cfg file, specify the following to handle the use of the check_nrpe plugin with remote scripts or plugins: In the file, specify the following service sections for each remote OpenStack host to be monitored: The above sections ensure that a server heartbeat, load check, and the OpenStack Identity service status are reported back to the Nagios server. As of May 25th, 2018, all communications with Nagios Enterprises and its employees are covered under our new. For example: Each defined command can then be specified in the services.cfg file on the Nagios monitoring server. Check web-interface user name and password, and check basic configuration. For example, advice was given in one of the above links (second one) to do the following: In the service definition add a line under "hostgroup_name": Remote Logging Installation and Configuration", Expand section "2. I was already tired of editing these humongous text files, and this just made it so easy. :) This is an excellent post. Linux is a registered trademark of Linus Torvalds. That's it for the SNMP monitoring example. For this sort of problem I do this a lot. The "-m RFC1213-MIB" is optional and tells the check_snmp plugin to only load the "RFC1213-MIB" instead of every single MIB that's installed on your system, which can help speed things up. I put in ` check_ssh!--host=localhost!--port=xxx22` and nagios will start with, Nagios: How to determine parameter order check_ssh. check_ping command is a Nagios plugin that is used to check the ping output of a remote server. Nagios provides complete monitoring of Ping - including reachability and packet loss. Verify that the updated configuration is working: If errors occur, check the parameters set in /etc/nagios/nagios.cfg, /etc/nagios/services.cfg, and /etc/nagios/hosts.cfg. . This tutorial explains how you can use check_ping command with some basic examples. How to Make a Black glass pass light through it? Host is just like a computer; it can be a physical device or virtual. Why do men's bikes have high bars where you can hit your testicles while women's bikes have the bar much lower? Assuming we are using the host definition given earlier and a check_ping command defined like this: define command { command_name check_ping command_line /usr/local/nagios/libexec/check_ping -H $HOSTADDRESS$ -w $ARG1$ -c $ARG2$ } The expanded/final command line to be executed for the service's check command would look like this: The scheduling engine employs some tricks to keep checks from bunching up and causing CPU spikes, otherwise if you had all of your checks set to run every minute, you would have 59 seconds of nothing and then everything run at once. Apologies, mistyped. The interval between checks in this example is 5 minutes (check_interval). check-host-alive is defined in commands.cfg to use check_ping. Threshold limit for check_ping should be passed as a threshold pair, which has two parts: In the following example, we are checking the ping output for 192.168.1.1 host. They're great. Learn more about Stack Overflow the company, and our products. Unix & Linux Stack Exchange is a question and answer site for users of Linux, FreeBSD and other Un*x-like operating systems. Write a short script for the item to be monitored (for example, whether a service is running), and place it in the /usr/lib64/nagios/plugins directory. 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. NSClient++ includes a service module that can check if a service is stopped. It only takes a minute to sign up. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. Looking for job perks? If it doesn't, skip this section. I also find it non-intuitive to have to maintain a list of exclusions separate to where the host itself is actually defined. It does seem to be registering on some level as in my Nagios logs I can see: Jul 16 19:12:27 localhost nagios: Warning: Duplicate definition found for service 'PING' on host 'server-01'. define service { use generic-service ; Name of service template to use host_name Host-1 service_description PING check_command check_nrpe!check_ping } define service { use . Why did DOS-based Windows require HIMEM.SYS to boot? The critical limit is 20ms or 5% packet loss. Bare Metal Provisioning (ironic) Log Files, 1.1.5. By default the check_ping command will send 5 ICMP ECHO packets. That's where you'll be adding host and service definitions for routers and switches. Any suggestions on how I can fix my check-host-alive command definition to work properly and evaluate the output of check_ping properly? Troubleshoot Keystone v3 Dashboard Authentication, 4.7. Monitoring Using Nagios", Expand section "3.1. If you want to ensure that a specific port/interface on the switch is in an up state, you could add a service definition like this: In the example above, the "-o ifOperStatus.1" refers to the OID for the operational status of port 1 on the switch. There aren't really any inherent limitations on the format or content of the performance data. Nagios is composed of a server, plugins that report object/host information from both local and remote machines back to the server, a web interface, and configuration that ties all of it together. Check WMI Plus includes a service module that can check if a service is stopped. Find centralized, trusted content and collaborate around the technologies you use most. 2. Why did US v. Assange skip the court of appeal? Mine always starts with either "PING: OK" or "PING: CRITICAL". I'm not sure if this is common use or not, but this article blew my mind when it came to setting up the config files. It's not them. nagios-devel Configure Nagios so that performance data is either written to files and/or processed by executing commands. This type of performance data is available for all checks that are performed. I'm sure the OP is well on to other things by now, but hopefully someone else who has this issue will benefit. Here's the service definition I use to monitor the bandwidth data that's stored in the log file. However, this can result in too high a CPU load on both the Nagios host and remote machine, and is not recommended. How about saving the world? Within the Nagios Web GUI / Dashboard, if I drill down into a Host page with the "Host State Information", I see this being reported for "Status Information" (IP address removed): Status Information: /usr/bin/ping -n -U -w 30 -c 5 {my-host-ip-address}, CRITICAL - Could not interpret output from ping command. Troubleshoot OpenStack Networking Issues, 4.4. What does 'They're at four. If you're monitoring bandwidth usage on your switches or routers using MRTG, you can have Nagios alert you when traffic rates exceed thresholds you specify. Can you help me? The first time you configure Nagios Core to monitor a network switch, you'll need to do a bit of extra work. By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. I can't find it though. Tell Nagios which hosts are being monitored. Everything in that folder should be at 0755. NRPE and the Nagios plugins must be installed on each remote machine to be monitored. Below are the command definitions for check-host-alive as well as check_ping. The hyperbolic space is a conformally compact Einstein manifold. Nagios: Service dependency on same host for an entire hostgroup, Nagios/Icinga check of Windows disk space, wrong -l argument. Uploaded the 2 files you requested. Therefore I have done below workaround in client side nrpe.cfg file. define service { use generic-service ; Inherit values from a template host_name linksys-srw224p ; The name of the host the service is associated with service_description PING ; The service description check_command check_ping!200.0,20%!600.0,60% ; The command used to monitor the service normal_check_interval 5 ; Check the service every 5 . OpenStack Dashboard - Red Hat Access Tab. Increase visibility into IT operations to detect and resolve technical issues before they impact your business. The commands that Nagios executes to process host and service performance data are determined by the host_perfdata_command and service_perfdata_command options, respectively. Eg. What were the poems other than those by Donne in the Melford Hall manuscript? Once you've added the new host and service definitions to the switch.cfg file, you're ready to start monitoring the router/switch. So in my troubleshooting, I drilled down into the Nagios Plugins directory (/usr/lib64/nagios/plugins), and ran a test with the check_ping plugin consistent with the way check-host-alive runs the command (see below for my check-host-alive command definition): This check_ping command returns the following output: PING OK - Packet loss = 0%, RTA = 0.63 By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. Which ability is most related to insanity: Wisdom, Charisma, Constitution, or Intelligence? Maybe you could look there and get credit for the answer if you have ideas. Inquire today and let our Quickstart team help you get started with Nagios XI, Up To: Contents Is there another (safer) option, such as adding the Nagios user to ping's group or something? Thanks for that. Our Customers If you need to change the modes to "write" or "non-blocking read/write" (useful when writing to pipes), you can use the host_perfdata_file_mode and service_perfdata_file_mode options. The check_init_service plugin does not support checking multiple services. Some cheaper "unmanaged" switches and hubs don't have IP addresses and are essentially invisible on your network, so there's not any way to monitor them. 565), Improving the copy in the close modal and post notices - 2023 edition, New blog post from our CEO Prashanth: Community is the future of AI. The following installation procedure installs: Install the required packages as the root user, using the yum command: If any of the packages are not immediately available (for example, gd-devel or gcc), you might have to enable the optional Red Hat channel using subscription-manager: Consider deploying Nagios to a server that is external to the OpenStack environment, allowing it to receive diagnostic information in the event of system issues. The check_snmp plugin will only get compiled and installed if you have the net-snmp and net-snmp-utils packages installed on your system. They are: To make your life a bit easier, a few configuration tasks have already been done for you: The above-mentioned config files can be found in the /usr/local/nagios/etc/objects/ directory. Why are players required to record the moves in World Championship Classical games? check_ping command is a Nagios plugin that is used to check the ping output of a remote server. Making statements based on opinion; back them up with references or personal experience. What is this brick with a round back and a stud on the side used for? Be aware that the service module is cAsE SeNsative, you can overcome this with the match= argument. As they are critical infrastructure components, you'll no doubt want to monitor them in at least some basic manner. Processing Performance Data Using Commands. NPCA includes a service module that can check if a service is stopped. I currently am experimenting with defining a set of services to all hosts in a hostgroup, this is working fine. Tip: You can usually find the OIDs that can be monitored on a switch by running the following command (replace 192.168.1.253 with the IP address of the switch): Why does Acts not mention the deaths of Peter and Paul? If you want to process the performance data that is available from Nagios and the plugins, you'll need to do the following: Read on for information on how to process performance data by writing to files or executing commands. You can always comment these services out if they are no longer needed by prefacing each line with a '#' character. This same file can be used to add new OpenStack monitoring services. Service or Daemon checks are system processes that run in the background, usually configured to start when the system boots. Check the documentation that comes with the addon for more information. Nagios is the most popular tool which is used to monitor hosts and services running in your IT infrastructure. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. While there are certainly some differences in the functionality, the overall end result is the same. Some methods support checking multiple services at once. I want to set interval between ping times is 10 seconds like below: But not exactly (about 90 seconds). Thx. Asking for help, clarification, or responding to other answers. Did the drapes in old theatres actually say "ASBESTOS" on them? Remember, you only need to do this for the *first* switch you monitor. What is the 'define host' entry for this host? This value can be viewed in the /etc/nagios/cgi.cfg file. Post Here's my basic C: drive space check. There should be no reference to /usr/bin/ping in that output, even when failing. In the following example, it will wait for 5 seconds before the connection time-out of the remote host. rev2023.4.21.43403. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. ", Adding EV Charger (100A) in secondary panel (100A) fed off main (200A). Unfortunately right now, even though the host name and service description match that of the group-level PING check, only one PING service is listed for server-01 and this is the group-level PING check, not the host level one. Find centralized, trusted content and collaborate around the technologies you use most. Thanks for the post. More expensive switches and routers have addresses assigned to them and can be monitored by pinging them or using SNMP to query status information. See this page for details on it's usage: http://nagiosplugins.org/man/check_ping Instead, I believe you'll need to use the check_http command to verify the web server is responding. At a minimum, Nagios plugins must return a single line of human-readable text that indicates the status of some type of measurable data. So for ping alerts it should go to network@example.com and for swap it should goto storage@example.com. An example command definition that redirects service check performance data to a text file for later processing by another application is shown below: What is scrcpy OTG mode and how does it work? Monitoring Using the Telemetry Service", Collapse section "2. Not the answer you're looking for? To me, this is not an ideal solution, as we could end up having to make many exceptions and this seems like it would be tough to maintain. This method is described in the next section. Making statements based on opinion; back them up with references or personal experience. Was Aristarchus the first to propose heliocentrism? Orthogonally defining services and contacts for a host/hostgroup? Nagios XI is the easy-to-use, enterprise version of Nagios that features: Download a free 60-day trial of Nagios XI or give the online demo a spin. that are installed when you follow the quickstart. I've deployed a new instance of Nagios on a fresh install of CentOS 7 via the EPEL repository. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. All rights reserved. @MrCleanX - I've read a few blog posts suggesting I check that. Overriding Nagios hostgroup service with host service, https://www.mail-archive.com/nagios-users@lists.sourceforge.net/msg29273.html, http://forum.centreon.com/showthread.php/10643-Over-riding-checks-in-hostgroup, http://ehc.ac/p/nagios/mailman/message/22496927/, http://markmail.org/message/ms6rzljthml7ejlt, http://nagios.sourceforge.net/docs/3_0/macros.html. Nagios services can have high CPU overhead if SSH is used. 1. I know that it may be possible to exclude certain hosts from a group, but this won't work for me as a hostgroup may have multiple services in it, and I won't want to have all of those services removed from the host. Configure Nagios to Monitor OpenStack Services, 3.2.5. Could you add more details? Open nagios web interface and see the host is being pinged properly. The plugin returns a CRITICAL state if the service is not started. The $HOSTEXECUTIONTIME$ and $SERVICEEXECUTIONTIME$ macros can be used to determine the number of seconds a host or service check was running and the $HOSTLATENCY$ and $SERVICELATENCY$ macros can be used to determine how "late" a regularly-scheduled host or service check was. The Industry Standard In IT Infrastructure Monitoring. What is Wario dropping at the end of Super Mario Land 2 and why? How about saving the world? What should I follow, if two altimeters show different altitudes? In the example above, the "/var/lib/mrtg/192.168.1.253_1.log" option that gets passed to the check_local_mrtgtraf command tells the plugin which MRTG log file to read from. Log Files for OpenStack Services", Collapse section "1.1. The example below defines a new check_ssh_load command: # 'check_ssh_load' command definition define . "Signpost" puzzle from Tatham's collection. The thing you post is a Nagios command. Adjust this to say, 10. Create Service Definitions for Remote Services, 4.2. How do you Null an inherited service check in nagios? Short story about swapping bodies as a job; the person who hires the main character misuses his body. That configuration file already contains some sample host, hostgroup, and service definitions. In my localhost.cfg I have tried: where xxx22 is the actual port. The sample configuration entries below reference objects that are defined in the sample config files (commands.cfg, templates.cfg, etc.) Looking at the check_ssh man page doesn't seem to indicate in what order to place these switches You can define a command and use that command for your service. The following installation procedure installs: nagios Nagios program that monitors hosts and services on the network, and which can send email or page alerts when a problem arises and when a problem is resolved. Nagios checks are not run on an exact schedule. Make sure that you don't (re)start Nagios until the verification process completes without any errors! Object definition files that are used to store information about items such as services or contact groups. Log Files for OpenStack Services", Expand section "1.3. If it doesn't, install net-snmp and net-snmp-utils and recompile/reinstall the Nagios plugins. Percentage of packet loss, which is called pl. Based on the ping output, you can decide to set certain warning and critical threshold level, based on which Nagios can send notifications to you. 4.0.8 . If this is the *first* switch you're monitoring, you can simply modify the sample host definition in switch.cfg. Checking if a service is running using SNMP is not very straight forward, checking a process is the best solution here, please refer to the Process Checks KB article. Media Coverage Stack Exchange network consists of 181 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers. Any complicated monitoring can be placed into a script, and then referred to in the command definition. NRPE is for more complicated checks, where you need to run commands directly on the remote server. Certification NSClient++ includes a service module that can check if a service is running. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. If Nagios Core can't get a response to its check, then it will flag the state of the service as CRITICAL, and will try again up to two more times before sending a notification. Interpreting non-statistically significant results: Do we have "no evidence" or "insufficient evidence" to reject the null? The best answers are voted up and rise to the top, Not the answer you're looking for? I am using nagios ver. Include check_command with nagios/icinga alerts.
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