More expensive switches and routers have addresses assigned to them and can be monitored by pinging them or using SNMP to query status information. It seems that Nagios is not running the correct command. 4.0.8 . - basically any type of metric that the plugin is measuring when it executes. Website Copyright 2009-2023 Nagios Enterprises, LLC. Why are players required to record the moves in World Championship Classical games? Could you add more details? What is Wario dropping at the end of Super Mario Land 2 and why? I tried that as well, but ran into a different issue. The module defines a "good" service as one that is running and a "bad" service is one that is not running, so you can define critical is when more than 0 "good" services exist. If you dont pass any arguments to the check_ping command, it will show all available options as shown below. How can I control PNP and NPN transistors together from one pin? Any suggestions on how I can fix my check-host-alive command definition to work properly and evaluate the output of check_ping properly? Find A Partner, Phone: 1-888-NAGIOS-1 For example: To set up monitoring on each remote machine, execute the following as the root user: In the /etc/nagios/nrpe.cfg file, add the central Nagios server IP address in the allowed_hosts line: In the /etc/nagios/nrpe.cfg file, add any commands to be used to monitor the OpenStack services. I did to interval of 3 and retry of 2. Any suggestions of what I can look at, I am out of ideas. What is the symbol (which looks similar to an equals sign) called? What risks are you taking when "signing in with Google"? On the central Nagios server, in the commands.cfg configuration file, define the new checks. If all goes fine then you can add more services running on the host that can be accessed remotely Checking SSH service We can use something like this to configure check for SSH service. Why do men's bikes have high bars where you can hit your testicles while women's bikes have the bar much lower? Thanks. Events What is this brick with a round back and a stud on the side used for? The plugin returns a CRITICAL state if the service is not started. define host { use windows-server host_name cielo01 alias cielo01 address cielo01 . 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. It's not them. that are installed when you follow the quickstart. Plugin-specific performance data (if available) can be obtained by using the $HOSTPERFDATA$ and $SERVICEPERFDATA$ macros. Unexpected uint64 behaviour 0xFFFF'FFFF'FFFF'FFFF - 1 = 0? What positional accuracy (ie, arc seconds) is necessary to view Saturn, Uranus, beyond? 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. There should be no reference to /usr/bin/ping in that output, even when failing. Monitoring Using Nagios", Expand section "3.1. Checking a service using SNMP is not very straight forward, checking a process is the best solution here, please refer to the Process Checks KB article. Troubleshoot Identity Client (keystone) Connectivity Problems, 4.3. Uploaded the 2 files you requested. 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. What is scrcpy OTG mode and how does it work? However, one server runs with much less free space than the norm. 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 (3-30 sec interval checks). The interval at which these commands are executed are governed by the host_perfdata_file_processing_interval and service_perfdata_file_processing_interval options, respectively. But ultimately, does not work as if I check the "performance data" of the service check results, I can see in there that the threshold included in the data is that of the group check, not the host check. I can't remember when (or why) I started using check_host, but that's indeed what I'm currently using. Check the documentation that comes with the addon for more information. :) This is an excellent post. 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. 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. It will have quite a lot of load on the system as well. How about saving the world? Maybe you could look there and get credit for the answer if you have ideas. by rkennedy Tue Aug 16, 2016 4:51 pm, Post Start check_tcp with -h to see the help for it. There are two basic categories of performance data that can be obtained from Nagios: Check performance data is internal data that relates to the actual execution of a host or service check. If this is the *first* switch you're monitoring, you can simply modify the sample host definition in switch.cfg. Why did US v. Assange skip the court of appeal? # Service definition to ping the switch using check_ping define service{ use generic-service hostgroup_name switches service_description PING check_command check_ping!200.0,20%!600.0,60% normal_check_interval 5 retry_check_interval 1 } # Service definition to monitor switch uptime using check_snmp define service{ use generic-service hostgroup . However, in the end, that's what I did - and it works. This value can be viewed in the /etc/nagios/cgi.cfg file. How a top-ranked engineering school reimagined CS curriculum (Ep. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. The best answers are voted up and rise to the top, Not the answer you're looking for? 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. This might include things like service check latency (i.e. I can execute the check manually, at the nagios server (Ubuntu Desktop) If the verification process produces any errors messages, fix your configuration file before continuing. Implementing effective Ping monitoring with Nagios offers the following benefits: These Nagios solutions provide Ping monitoring capabilities and benefits: Nagios XI is the most powerful and trusted infrastructure monitoring tool on the market. So for ping alerts it should go to network@example.com and for swap it should goto storage@example.com. Once you've added the new host and service definitions to the switch.cfg file, you're ready to start monitoring the router/switch. 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. 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. Did the drapes in old theatres actually say "ASBESTOS" on them? SSH can also be used to access remote Nagios plugins. 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. Up To: Contents host_name server1. rev2023.4.21.43403. My understanding, however, is that a change was made around version 3.2.0 to allow host-level services to take precedence of hostgroup-level services. It only takes a minute to sign up. I put in ` check_ssh!--host=localhost!--port=xxx22` and nagios will start with, Nagios: How to determine parameter order check_ssh. I find it very strange that there are entries in /usr/bin that normal users are not allowed to run? Why did DOS-based Windows require HIMEM.SYS to boot? NPCA allows you to check multiple services, here is an example that checks for some services that are running and some that are stopped. 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: Orthogonally defining services and contacts for a host/hostgroup? The interval between checks in this example is 5 minutes (check_interval). There are those who will say this isn't a good option because of the ability to range the check_ping command, but it should be remembered that host checks aren't even executed until all service checks for a given host have failed. Identity Service (keystone) Log Files, 1.1.12. Ensure that Nagios is started automatically when the system boots: Check your Nagios access by using the following URL in your browser, and using the nagiosadmin user and the password that was set in Step 2: If the Nagios URL cannot be accessed, ensure your firewall rules have been set up correctly. I'll describe how you can monitor the following things on managed switches, hubs, and routers: Note: These instructions assume that you've installed Nagios according to the quickstart guide. Are you talking about check interval? Our tech support team is happy to help you with any questions you might have. Additional service files can be used, but they must be specified as a cfg_file parameter in the /etc/nagios/nagios.cfg file. In my localhost.cfg I have tried: where xxx22 is the actual port. Now you can add some service definitions (to the same configuration file) to monitor different aspects of the switch. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. The critical limit is 20ms or 5% packet loss. Percentage of packet loss, which is called pl. Monitoring Using the Telemetry Service", Expand section "3. Remember, you only need to do this for the *first* switch you monitor. Asking for help, clarification, or responding to other answers. Browse other questions tagged. Short story about swapping bodies as a job; the person who hires the main character misuses his body. Nagios should be hosted on a securely locked down server, especially if security events are being monitored. 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, Nagios failing restart with new service directove in localhost.cfg, nagios socket timeout error in master server, Nagios variable $HOSTNAME$ in service definition, Unable to read nagios exit status in nagios core. Anyway, if you're interested in testing throughput, there are MUCH better ways of going about it than relying on ICMP, which is the lowest priority traffic type on a network. If you like to change this, use -t option. : In your host template set a default value: In the host definition that should use a difference value set e.g. See Also: Plugins, Plugin API. Monitoring Using the Telemetry Service, 3.2.2. The format in which host and service performance data is written to those files is determined by the host_perfdata_file_template and service_perfdata_file_template options. After installing nagios and nagios-plugins-all (via yum), I've created a number of hosts and service definitions, have tested my configuration with nagios -v /etc/nagios/nagios.cfg, and have Nagios up and running! What is the Russian word for the color "teal"? How to Make a Black glass pass light through it? Adjust this to say, 10. If it doesn't, install net-snmp and net-snmp-utils and recompile/reinstall the Nagios plugins. 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. Making statements based on opinion; back them up with references or personal experience. Benefits Implementing effective Ping monitoring with Nagios offers the following benefits: Increased server, services, and application availability Fast detection of network outages and protocol failures Solutions 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. If your switch supports SNMP, you can monitor port status, etc. The hyperbolic space is a conformally compact Einstein manifold. Log Files for Supporting Services, 1.3. Thanks for contributing an answer to Server Fault! For the *first* router/switch you monitor, you can simply modify the sample host and service definitions in that file, rather than creating new ones. Is there another (safer) option, such as adding the Nagios user to ping's group or something? Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. Check web-interface user name and password, and check basic configuration. 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. NRPE and the Nagios plugins must be installed on each remote machine to be monitored. check-host-alive is defined in commands.cfg to use check_ping. Configure Nagios to Monitor OpenStack Services, 3.2.5. 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. NPCA includes a service module that can check if a service is running. Some methods support checking multiple services at once. ", Adding EV Charger (100A) in secondary panel (100A) fed off main (200A). Include check_command with nagios/icinga alerts. The check_init_service plugin does not support checking multiple services. The following are some possible error messages that you might get when you try to use check_ping command. The "1000000,2000000" options are the warning thresholds (in bytes) for incoming and outgoing traffic rates respectively. News What does 'They're at four. NPCA includes a service module that can check if a service is stopped. Not the answer you're looking for? Interpreting non-statistically significant results: Do we have "no evidence" or "insufficient evidence" to reject the null? Log in to the Nagios dashboard again by using the following URL in your browser, and using the nagiosadmin user and the password that was set in the beginning: Expand section "1.1. 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. Bare Metal Provisioning (ironic) Log Files, 1.1.5. It also tells us that. 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": In your ping service definition use e.g. Nagios checks are not run on an exact schedule. Troubleshoot Keystone v3 Dashboard Authentication, 4.7. Post If not, youll get an error. by cornelp Fri Aug 26, 2016 2:03 pm, Post An example command definition that redirects service check performance data to a text file for later processing by another application is shown below: Tip: This method, while flexible, comes with a relatively high CPU overhead. Was Aristarchus the first to propose heliocentrism? Troubleshoot Instance Launching Errors in the Dashboard, 4.6. You'll need to create some object definitions in order to monitor a new router/switch. This type of performance data is available for all checks that are performed. I had to rename them to txt as it would not allow the original ext. This same file can be used to add new OpenStack monitoring services. Remote Logging Installation and Configuration, 1.3.3. Increased server, services, and application availability, Fast detection of network outages and protocol failures. Media Coverage Which language's style guidelines should be used when writing code that is supposed to be called from another language? By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. OpenStack Dashboard - Red Hat Access Tab", Red Hat JBoss Enterprise Application Platform, Red Hat Advanced Cluster Security for Kubernetes, Red Hat Advanced Cluster Management for Kubernetes, Logging, Monitoring, and Troubleshooting Guide, 1.1.1. Create Service Definitions for Remote Services, 4.2. Extracting arguments from a list of function calls. By default, when Nagios is installed, the default httpd user and password is: nagiosadmin / nagiosadmin. 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. Learn more about Stack Overflow the company, and our products. My /etc/nagios/objects/commands.cfg states, which defines the arguments in between the exclamation marks as in the documentation example you gave. Additionally, you can have Nagios periodically execute commands to periocially process the performance data files (e.g. The warning limit is 10ms RTA or 2% packet-loss. Connect and share knowledge within a single location that is structured and easy to search. Why did US v. Assange skip the court of appeal? What are the arguments for/against anonymous authorship of the Gospels, Embedded hyperlinks in a thesis or research paper. Log Files for OpenStack Services", Collapse section "1.1. I was already tired of editing these humongous text files, and this just made it so easy. Log Files for OpenStack Services", Expand section "1.3. check_ping command is a Nagios plugin that is used to check the ping output of a remote server. What is Wario dropping at the end of Super Mario Land 2 and why? Modify host_name appropriately. Be aware that the service module is cAsE SeNsative, you can overcome this with the match= argument. Documentation, Purchase Online To learn more, see our tips on writing great answers. Define a host in linux-server with a custom PING service definition: 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. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. Make sure the plugin exists in /usr/local/nagios/libexec before you continue. Actually called check_host, without the 's'. Have you made sure that the nagios user can run the ping command? "host_name !zlinux_hostname". 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. By default, on the Nagios server, the /etc/nagios/objects/localhost.cfg file is used to define services for basic local statistics; for example, swap usage or the number of current users. with the check_snmp plugin and bandwidth (if you're using MRTG) with the check_mrtgtraf plugin. It's not running 'on' the remote host - the check_ping command is running a ping on the nagios server against the remote host. Make sure that you don't (re)start Nagios until the verification process completes without any errors! To do this, you can include the service in the server1.cfg file, as in the following example, which pings the host on a regular basis: define service{ use local-service ; Name of service template to use. 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. @MrCleanX - I've read a few blog posts suggesting I check that. The hyperbolic space is a conformally compact Einstein manifold. The module 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 CRITICAL an OK state). NSClient++ allows you to check multiple services, here is an example that checks for two services that are running. Did the drapes in old theatres actually say "ASBESTOS" on them? Knowledge Base The "10" option causes the plugin to return a CRITICAL state if the MRTG log file is older than 10 minutes (it should be updated every 5 minutes). Community Support Forums For Nagios Open Source Projects, Community Support Forums For Nagios Commercial Products, https://assets.nagios.com/downloads/nag gmain.html. 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. You can modify the definitions in these and other definitions to suit your needs better if you'd like. They're great. By default, it will use IPv4. This means if the check_ping does not get a result in 10 seconds, the command will timeout. Unfortunately, my host checks are failing (although my service checks are working perfectly fine). Making statements based on opinion; back them up with references or personal experience. by cornelp Tue Aug 16, 2016 10:43 am, Post Contact Sales Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide. I am using nagios ver. Nagios provides complete monitoring of Ping - including reachability and packet loss. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. by Box293 Sun Aug 28, 2016 8:34 pm, Post It does seem to be registering on some level as in my Nagios logs I can see: At this point I think enabling debug mode and looking at the debug log will be required to understand what is going on. 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. 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). Which language's style guidelines should be used when writing code that is supposed to be called from another language? 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.
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