At a minimum, the following must be done: If the OpenStack cloud includes distributed hosts: /etc/nagios/objects/ObjectsDir/ObjectsFile.cfg. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. 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. Monitoring Routers and Switches Nagios Core Documentation The OP is still lurking. Community Support Forums For Nagios Open Source Projects, Community Support Forums For Nagios Commercial Products, https://assets.nagios.com/downloads/nag gmain.html. Why did US v. Assange skip the court of appeal? Our Customers Unfortunately, my host checks are failing (although my service checks are working perfectly fine). 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. At a minimum, Nagios plugins must return a single line of human-readable text that indicates the status of some type of measurable data. An example command definition that redirects service check performance data to a text file for later processing by another application is shown below: To learn more, see our tips on writing great answers. I could not found the ping on /usr/bin/ping. by tmcdonald Wed Aug 17, 2016 2:31 pm, Post Monitoring Using the Telemetry Service", Expand section "3. Orthogonally defining services and contacts for a host/hostgroup? That's where you'll be adding host and service definitions for routers and switches. This method is described in the next section. What is the symbol (which looks similar to an equals sign) called? The nagios standard services such as PING, and check_users work, but check_ssh remains in an UNKNOWN state from the very beginning. Learn more about Stack Overflow the company, and our products. Creating a new HTTP service | Nagios Core Administration Cookbook - Packt Log Files for Supporting Services, 1.3. The state information delivers "Usage: " which is an indicator that the parameters are wrong. Troubleshoot OpenStack Networking Issues, 4.4. 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. 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. how "late" was the service check from its scheduled execution time) and the number of seconds a host or service check took to execute. Service or Daemon checks are system processes that run in the background, usually configured to start when the system boots. Did the drapes in old theatres actually say "ASBESTOS" on them? To learn more, see our tips on writing great answers. There are several different use cases covered in this KB article: Service - Started Service - Stopped Multiple Services The sections below provide examples of how to perform these checks using different methods. The sample configuration entries below reference objects that are defined in the sample config files (commands.cfg, templates.cfg, etc.) Up To: Contents This will exclude the zlinux host from the service check. Here Host, warning and critical thresholds were passing by Nagios host as below, define service { use generic-service hostgroup_name all-servers service_description Host Ping Status check_command check_nrpe_args!check_ping_args!localhost!3000.0,80%!5000.0,100% } Share Follow answered Apr 28, 2020 at 1:45 Hasitha 698 8 16 Add a comment Asking for help, clarification, or responding to other answers. 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. Which was the first Sci-Fi story to predict obnoxious "robo calls"? 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. Nagios provides complete monitoring of Ping - including reachability and packet loss. Actually called check_host, without the 's'. Email: sales@nagios.com Nagios' check_ssh (of course) keeps marking the process as critical since it can't connect on that port. 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 minutes . Knowledge Base If it doesn't, install net-snmp and net-snmp-utils and recompile/reinstall the Nagios plugins. Plugin-specific data can include things like percent packet loss, free disk space, processor load, number of current users, etc. In my example, I'm monitoring one of the ports on a Linksys switch. If your switch supports SNMP, you can monitor port status, etc. Therefore I have done below workaround in client side nrpe.cfg file. Service or Daemon checks are system processes that run in the background, usually configured to start when the system boots. By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. Read on for more information on how plugins can return performance data to Nagios for inclusion in the $HOSTPERFDATA$ and $SERVICEPERFDATA$ macros. Increase visibility into IT operations to detect and resolve technical issues before they impact your business. Include check_command with nagios/icinga alerts. by Box293 Sun Aug 28, 2016 8:34 pm, Post By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. In the following example, it sends 10 ICMP ECHO packets to the remote host before its output is measured. 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. What is the symbol (which looks similar to an equals sign) called? Plugin performance data is external data specific to the plugin used to perform the host or service check. 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. Monitoring switches and routers can either be easy or more involved - depending on what equipment you have and what you want to monitor. But, when you use IPv6 address, you should use -6 as shown below. 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. How a top-ranked engineering school reimagined CS curriculum (Ep. Making statements based on opinion; back them up with references or personal experience. How to Make a Black glass pass light through it? Why are players required to record the moves in World Championship Classical games? Data Processing (sahara) Log Files, 1.1.6. When the host goes down, no matter what numbers I use, It will not send an alert until 1.5 minutes later. Check WMI Plus includes a service module that can check if a service is stopped. nagios (Last Notification: N/A (notification 0)). Nagios: config ping times - Stack Overflow snmpwalk -v1 -c public 192.168.1.253 -m ALL .1. 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. Tikz: Numbering vertices of regular a-sided Polygon, English version of Russian proverb "The hedgehogs got pricked, cried, but continued to eat the cactus", The hyperbolic space is a conformally compact Einstein manifold. Remove the leading pound (#) sign from the following line in the main configuration file: What did you just do? 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. In the check_command directive of the service definition above, the "-C public" tells the plugin that the SNMP community name to be used is "public" and the "-o sysUpTime.0" indicates which OID should be checked. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. Multiple lines of performace data (as well as normal text output) can be obtained from plugins, as described in the plugin API documentation. If you want to have more granular (free) monitoring, check out InfluxDB, Telegraf and Grafana. This tutorial explains how you can use check_ping command with some basic examples. Maybe you could look there and get credit for the answer if you have ideas. That's it for the SNMP monitoring example. The first time you configure Nagios Core to monitor a network switch, you'll need to do a bit of extra work. That configuration file already contains some sample host, hostgroup, and service definitions. Thanks for the post. tar command with and without --absolute-names option. Thanks. Nagios services can have high CPU overhead if SSH is used. If not, youll get an error. There should be no reference to /usr/bin/ping in that output, even when failing. I'm trying to figure out how can I check a service and/or a host every 20 secs, then re-try every 10 secs, only to send a notification after 3 retries. What are the arguments for/against anonymous authorship of the Gospels, Embedded hyperlinks in a thesis or research paper. I put in ` check_ssh!--host=localhost!--port=xxx22` and nagios will start with, Nagios: How to determine parameter order check_ssh. Thanks for contributing an answer to Stack Overflow! 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. The check_mrtgtraf plugin (which is included in the Nagios plugins distribution) allows you to do this. 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. Add the following service definition to monitor the uptime of the switch. 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. For the time being, just follow the directions outlined below and you'll be monitoring your network routers/switches in no time. Browse other questions tagged, 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. Keep your systems secure with Red Hat's specialized responses to security vulnerabilities. by cornelp Wed Aug 17, 2016 8:32 am, Post A boy can regenerate, so demons eat him for years. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. :) This is an excellent post. How to disable host checks of existing hosts in Nagios? define host { use windows-server host_name cielo01 alias cielo01 address cielo01 . How can I control PNP and NPN transistors together from one pin? This same file can be used to add new OpenStack monitoring services. 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. nagios-devel "host_name !zlinux_hostname". 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. The "AVG" option tells it that it should use average bandwidth statistics. 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. For example: Each defined command can then be specified in the services.cfg file on the Nagios monitoring server. Nagios servers may receive a considerable amount of network traffic, resulting in resource contention. Here's the service definition I use to monitor the bandwidth data that's stored in the log file. check_ping command is a Nagios plugin that is used to check the ping output of a remote server. Monitoring Routers and Switches - Nagios line, since nagios will substitute $HOSTADDRESS$ for the appropriate hosts ip/name. What were the poems other than those by Donne in the Melford Hall manuscript? If you're processing performance data for a large number of hosts and services, you'll probably want Nagios to write performance data to files instead. The Nagios monitoring system can be used to provide monitoring and alerts for the OpenStack network and infrastructure. An example file format template for service performance data might look like this: By default, the text files will be opened in "append" mode. I would suggest you to change the check_command to something like my-check-host-alive and to define my-check-host-alive in commands.cfg to use something like check_tcp. Configure Nagios to Monitor OpenStack Services, 3.2.5. Nagios should be hosted on a securely locked down server, especially if security events are being monitored. Plugin-specific performance data is optional and may not be supported by all plugins. Thanks for that. By default the check_ping command will send 5 ICMP ECHO packets. service_description PING. NSClient++ includes a service module that can check if a service is running. Videos It is great for things like number of services or what load or how much memory each machine has. Troubleshoot Identity Client (keystone) Connectivity Problems, 4.3. 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. The critical limit is 20ms or 5% packet loss. Remember, you only need to do this for the *first* switch you monitor. After some checking the issue further noticed that the reason is IP protocol. Why do men's bikes have high bars where you can hit your testicles while women's bikes have the bar much lower? However, it doesn't describe in which order to pass parameters. 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 . 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. Check the documentation that comes with the addon for more information. Nagios' check_ssh (of course) keeps marking the process as critical since it can't connect on that port. It is not possible to set intervals of less then one minute with Nagios. There are no attachments for this article. The Industry Standard In IT Infrastructure Monitoring. Make sure that you don't (re)start Nagios until the verification process completes without any errors! Here's my basic C: drive space check. On the central Nagios server, in the commands.cfg configuration file, define the new checks. The interval between checks in this example is 5 minutes (check_interval). Be aware that the service module is cAsE SeNsative, you can overcome this with the match= argument. Sample output from the plugin might look like this: When Nagios sees this plugin output format it will split the output into two parts: In the example above, the $HOSTOUTPUT$ or $SERVICEOUTPUT$ macro would contain "PING ok - Packet loss = 0%, RTA = 0.80 ms" (without quotes) and the $HOSTPERFDATA$ or $SERVICEPERFDATA$ macro would contain "percent_packet_loss=0, rta=0.80" (without quotes). What are the arguments for/against anonymous authorship of the Gospels, Generic Doubly-Linked-Lists C implementation. In my localhost.cfg I have tried: check_ssh!xxx22!localhost . Why does Acts not mention the deaths of Peter and Paul? Monitoring Using the Telemetry Service", Collapse section "2. It only takes a minute to sign up. You'll need to create some object definitions in order to monitor a new router/switch. NRPE and the Nagios plugins must be installed on each remote machine to be monitored. Contact Sales 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. Why in the Sierpiski Triangle is this set being used as the example for the OSC and not a more "natural"? Connect and share knowledge within a single location that is structured and easy to search. Asking for help, clarification, or responding to other answers. This should be specified as %age. Which language's style guidelines should be used when writing code that is supposed to be called from another language? The object file localhost.cfg allows for parameters to be passed to check_ssh. # 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 . It seems to me that there has to be a safer way to do it. by rkennedy Tue Aug 16, 2016 4:51 pm, Post What is this brick with a round back and a stud on the side used for? The "5000000,5000000" are critical thresholds (in bytes) for incoming and outgoing traffic rates respectively. Nagios Alert - Server Down but Server is online - Stack Overflow 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: So for ping alerts it should go to network@example.com and for swap it should goto storage@example.com. I tried that as well, but ran into a different issue. Arranging it this way allows me to only add custom services, and service checks that aren't the norm in the host definition. Testimonials Nagios Monitoring Hosts with check_ping - Stack Overflow For situations, for example, where one particular Linux Server needs to have it's PING check threshold raised from the default. check_ping command is a Nagios plugin that is used to check the ping output of a remote server. the '-t 10' is not the interval, but the timeout argument. I can't remember when (or why) I started using check_host, but that's indeed what I'm currently using. Did the Golden Gate Bridge 'flatten' under the weight of 300,000 people in 1987? I was fairly certain that running chmod U+s /usr/bin/ping would solve the issue, but I was (and still am) wary about chmod'ing system files. Troubleshoot Keystone v3 Dashboard Authentication, 4.7. Uploaded the 2 files you requested. Browse other questions tagged. What positional accuracy (ie, arc seconds) is necessary to view Saturn, Uranus, beyond? Increased server, services, and application availability, Fast detection of network outages and protocol failures. I checked log: /usr/local/nagios/var/nagios.log the interval between ping times is 90 seconds. The hyperbolic space is a conformally compact Einstein manifold. If you like to change this, use -t option. The plugin returns a CRITICAL state if the service is not started. Service Checks - Nagios Support I was already tired of editing these humongous text files, and this just made it so easy. "Signpost" puzzle from Tatham's collection, Using an Ohm Meter to test for bonding of a subpanel. Use -H option to specify the hostname or the ip-address of the server for which you like to check the ping command output. By default, it will use IPv4. is there such a thing as "right to be heard"? To learn more, see our tips on writing great answers. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. Nagios Configuration is below, I don't see how it can be wrong as I copied it from server and simply changed the server name. 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. Has the cause of a rocket failure ever been mis-identified, such that another launch failed due to the same problem? Install the Nagios Service", Collapse section "3.1. check-host-alive is defined in commands.cfg to use check_ping. I had to rename them to txt as it would not allow the original ext. Post 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. I find it very strange that there are entries in /usr/bin that normal users are not allowed to run? So, you really dont need to specify -4 (which is optional). Nagios checks are not run on an exact schedule. By default the check_ping command will do the connection time out (if it is unable to reach the destination host) after 10 seconds. The "1000000,2000000" options are the warning thresholds (in bytes) for incoming and outgoing traffic rates respectively. Nagios: How to determine parameter order check_ssh What differentiates living as mere roommates from living in a marriage-like relationship? This might include things like service check latency (i.e. 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. Why does Acts not mention the deaths of Peter and Paul? This type of performance data is available for all checks that are performed. All OpenStack services can be reported, just ensure that a matching command is specified in the remote servers nrpe.cfg file. Could you add more details? For example, the following script checks the number of Compute instances, and is stored in a file named nova-list: In the /etc/nagios/objects/commands.cfg file, specify a command section for each new script: In the /etc/nagios/objects/localhost.cfg file, define a service for each new item, using the defined command. Note: Replace "linksys-srw224p" in the example definitions below with the name you specified in the host_name directive of the host definition you just added. You can modify the definitions in these and other definitions to suit your needs better if you'd like. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. ', referring to the nuclear power plant in Ignalina, mean? Performance Data - Nagios 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. once I passed the correct IP protocol , It worked fine. He also rips off an arm to use as a sword. I changed the Nagios cfg file interval_length to 10 and the host file to 20 and 10. You could use "Custom Variable Macros" (http://nagios.sourceforge.net/docs/3_0/macros.html). 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! If the verification process produces any errors messages, fix your configuration file before continuing. I am using nagios ver. Understanding the probability of measurement w.r.t. How to Make a Black glass pass light through it? If total energies differ across different software, how do I decide which software to use? What is the Russian word for the color "teal"? Here Host, warning and critical thresholds were passing by Nagios host as below. Two MacBook Pro with same model number (A1286) but different year. Once you've added the new host and service definitions to the switch.cfg file, you're ready to start monitoring the router/switch. 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. Not the answer you're looking for? Have you made sure that the nagios user can run the ping command? Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide. 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. What is scrcpy OTG mode and how does it work? The plugin 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 "stopped" have an OK state). Change the host_name, alias, and address fields to appropriate values for the switch. since there is no predefined argument to specify the port, like --port=$ARG1$ in the definition, but only a generic place holder. I can't find it though. However, one server runs with much less free space than the norm. 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. Database as a Service (trove) Log Files, 1.1.7. Overriding Nagios hostgroup service with host service In the following example, it will wait for 5 seconds before the connection time-out of the remote host. Content Discovery initiative April 13 update: Related questions using a Review our technical responses for the 2023 Developer Survey, Can execute nagios ssh check manually but get 126/127 out of bounds error from nagios, Different Nagios email notifications for different services, Nagios host notifications not sending via email or logging, Nagios - "Unable to send check for host" or "run check for service". 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.