{"id":8005,"date":"2024-07-20T13:18:00","date_gmt":"2024-07-20T07:48:00","guid":{"rendered":"https:\/\/pheonixsolutions.com\/blog\/?p=8005"},"modified":"2024-07-20T13:18:03","modified_gmt":"2024-07-20T07:48:03","slug":"how-to-set-up-the-cpu-service-monitor-on-nagios-with-percentages","status":"publish","type":"post","link":"https:\/\/pheonixsolutions.com\/blog\/how-to-set-up-the-cpu-service-monitor-on-nagios-with-percentages\/","title":{"rendered":"HOW TO SET UP THE CPU SERVICE MONITOR ON NAGIOS WITH PERCENTAGES"},"content":{"rendered":"\n

Introduction:<\/strong>
To set up the CPU service monitor on Nagios with percentages, follow these general instructions. CPU monitors CPU utilization, load averages, and other server performance measures, and if a process exceeds a certain threshold, it alerts the Nagois server.<\/p>\n\n\n\n

Prerequisite<\/strong>:
1. Server root login credentials.
Step 1:<\/strong>
Log in to your Ubuntu or Centos server as a user with sudo privileges.<\/p>\n\n\n\n

$ ssh root@Ip<\/td><\/tr><\/tbody><\/table>
Step 2:<\/strong>
Edit the \/usr\/local\/nagios\/etc\/nrpe.cfg configuration file and search for command<\/em><\/strong> definition sections. Here you can define or update check commands.<\/figcaption><\/figure>\n\n\n\n
$ vi \/usr\/local\/nagios\/etc\/nrpe.cfg<\/td><\/tr><\/tbody><\/table>

Update the below command for the CPU check.<\/figcaption><\/figure>\n\n\n\n
command[check_cpu]=\/usr\/local\/nagios\/libexec\/check_cpu<\/td><\/tr><\/tbody><\/table>
Step 3:<\/strong>
Go to the libexec path and create a new script file in the specified path, such as check_cpu. The script should check if the CPU service checking the server process.<\/figcaption><\/figure>\n\n\n\n
vi \/usr\/local\/nagios\/libexec\/check_cpu<\/td><\/tr><\/tbody><\/table>
Copy the below commands, and paste the check_cpu file, and save the file.


<\/figcaption><\/figure>\n\n\n\n
#!\/bin\/bash

#Get CPU usage percentage
CPU_USAGE=$(top -bn1 | grep “Cpu(s)” | awk ‘{print $2 + $4}’ | cut -d. -f1)

#Define thresholds for CPU usage
WARNING_THRESHOLD=70
CRITICAL_THRESHOLD=80

#Compare CPU usage with the thresholds
if [ “$CPU_USAGE” -ge “$CRITICAL_THRESHOLD” ]; then
echo “CPU usage is ${CPU_USAGE}%. Critical threshold exceeded!”
exit 2 # Nagios return code for critical status
elif [ “$CPU_USAGE” -ge “$WARNING_THRESHOLD” ]; then
echo “CPU usage is ${CPU_USAGE}%. Warning threshold exceeded!”
exit 1 # Nagios return code for warning status
else
echo “CPU usage is ${CPU_USAGE}%.”
exit 0 # Nagios return code for OK status
fi<\/td><\/tr><\/tbody><\/table>
Step 4:<\/strong>
Give permission to the check_cpu file as below<\/figcaption><\/figure>\n\n\n\n
$ chmod 755 check_cpu<\/td><\/tr><\/tbody><\/table>

Restart the NRPE service.

<\/figcaption><\/figure>\n\n\n\n
$ systemctl restart nagios-nrpe-server
or
$ $ systemctl restart nrpe<\/td><\/tr><\/tbody><\/table>
Step 6<\/strong>:
Login to Nagios server

Step 7<\/strong>:

Open the below for the configuration path.<\/figcaption><\/figure>\n\n\n\n
$ vi \/usr\/local\/nagios\/etc\/servers\/server.cfg<\/td><\/tr><\/tbody><\/table>
Add the below lines for CPU checking the configuration and save it.<\/figcaption><\/figure>\n\n\n\n
define service {
       use                             generic-service         ; Name of service template to use
       host_name                       testserver2
       service_description           cpu_service
       check_command              check_nrpe!check_cpu
       contact_groups                 admins
       notifications_enabled        1
       }<\/td><\/tr><\/tbody><\/table>
Step 8:<\/strong>
Save the configuration file.

And finally, restart Nagios to apply the recent configuration changes:
<\/figcaption><\/figure>\n\n\n\n
$ systemctl restart nagios<\/td><\/tr><\/tbody><\/table>
We can verify the cpu_service status in the below snaps<\/span>
<\/a><\/figcaption><\/a><\/figure><\/figcaption><\/figure>\n\n\n\n
\n
\"\"<\/a><\/figure>\n<\/figure>\n\n\n\n

Conclusion<\/strong>
Following the steps mentioned above, we can set up the CPU service monitor on Nagios with percentages.<\/p>\n","protected":false},"excerpt":{"rendered":"

Introduction:To set up the CPU service monitor on Nagios with percentages, follow these general instructions. CPU monitors CPU utilization, load […]<\/p>\n","protected":false},"author":499,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_feature_clip_id":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":false,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2},"jetpack_post_was_ever_published":false},"categories":[1019],"tags":[],"class_list":["post-8005","post","type-post","status-publish","format-standard","hentry","category-cloud-aws","psol-cat-cloud-aws"],"jetpack_publicize_connections":[],"jetpack_shortlink":"https:\/\/wp.me\/phn2x7-257","jetpack_sharing_enabled":true,"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/pheonixsolutions.com\/blog\/wp-json\/wp\/v2\/posts\/8005","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/pheonixsolutions.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/pheonixsolutions.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/pheonixsolutions.com\/blog\/wp-json\/wp\/v2\/users\/499"}],"replies":[{"embeddable":true,"href":"https:\/\/pheonixsolutions.com\/blog\/wp-json\/wp\/v2\/comments?post=8005"}],"version-history":[{"count":0,"href":"https:\/\/pheonixsolutions.com\/blog\/wp-json\/wp\/v2\/posts\/8005\/revisions"}],"wp:attachment":[{"href":"https:\/\/pheonixsolutions.com\/blog\/wp-json\/wp\/v2\/media?parent=8005"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/pheonixsolutions.com\/blog\/wp-json\/wp\/v2\/categories?post=8005"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/pheonixsolutions.com\/blog\/wp-json\/wp\/v2\/tags?post=8005"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}