{"id":7316,"date":"2023-08-19T12:41:05","date_gmt":"2023-08-19T07:11:05","guid":{"rendered":"https:\/\/pheonixsolutions.com\/blog\/?p=7316"},"modified":"2023-08-19T12:41:09","modified_gmt":"2023-08-19T07:11:09","slug":"how-to-set-up-the-pm2-service-monitor-on-nagios","status":"publish","type":"post","link":"https:\/\/pheonixsolutions.com\/blog\/how-to-set-up-the-pm2-service-monitor-on-nagios\/","title":{"rendered":"How to set up the PM2 service monitor on Nagios"},"content":{"rendered":"\n

Introduction:<\/strong><\/p>\n\n\n\n

To set up the PM2 service monitor on Nagios, you’ll need to follow these general steps. PM2 is a process manager for Node.js applications, so we’ll assume you’re monitoring Node.js processes managed by PM2.<\/p>\n\n\n\n

Prerequisite<\/strong>:<\/p>\n\n\n\n

1. Server root login credentials.<\/p>\n\n\n\n

Step 1:<\/strong><\/p>\n\n\n\n

Log in to your Ubuntu or Centos server as a user with sudo privileges. You can use SSH or directly access the server.<\/p>\n\n\n\n

$ ssh root@Ip<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

Step 2:<\/strong><\/p>\n\n\n\n

Edit the \/etc\/nagios\/nrpe.cfg configuration file and search for command<\/em><\/strong> definition sections. Here you can define or update check commands.<\/p>\n\n\n\n

$ vi \/etc\/nagios\/nrpe.cfg<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

Please update the below command for the PM2 check.<\/p>\n\n\n\n

command[check_pm2_port]= \/usr\/lib\/nagios\/plugins\/check_pm2_port.sh<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

Step 3:<\/strong><\/p>\n\n\n\n

Please go to the plugin’s path and create a new script file in the specified path, such as check_pm2_port.sh. The script should check if the PM2 service port is open or not.<\/p>\n\n\n\n

vi \/usr\/lib\/nagios\/plugins\/check_pm2_port.sh<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

Please copy the below commands, and paste the check_pm2_port.sh file, and save the file.<\/p>\n\n\n\n

#!\/bin\/bash
 
# Modify the following variables according to your setup
PM2_HOST=”localhost”
PM2_PORT=3000
 
nc -z -w 2 $PM2_HOST $PM2_PORT > \/dev\/null 2>&1
result=$?
 
if [ $result -eq 0 ]; then
    echo “OK – PM2 service is listening on port $PM2_PORT”
    exit 0
else
    echo “CRITICAL – PM2 service is not listening on port $PM2_PORT”
    exit 2
fi<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

Step 4:<\/strong><\/p>\n\n\n\n

Give permission to the check_pm2_port.sh file and follow the below command:<\/p>\n\n\n\n

chmod 755 check_pm2_port.sh<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

Step 5:<\/strong><\/p>\n\n\n\n

Next, restart the NRPE service. Now it is ready to listen to requests from the Nagios Server.<\/p>\n\n\n\n

systemctl restart nagios-nrpe-server<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

Open the Nagios server.<\/strong><\/p>\n\n\n\n

Step 6:<\/strong><\/p>\n\n\n\n

Go to the path of the object using the below commands:<\/p>\n\n\n\n

vi \/usr\/local\/nagios\/etc\/objects\/commands.cfg<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

Here, we want to add the below command to a file and save it.<\/p>\n\n\n\n

define command {
    command_name    check_pm2_port
    command_line    \/usr\/lib\/nagios\/plugins\/check_nrpe -H $HOSTADDRESS$ -c check_pm2_port
}<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

Step 7:<\/strong><\/p>\n\n\n\n

Please open the below for the configuration path.<\/p>\n\n\n\n

vi \/usr\/local\/nagios\/etc\/servers\/testserver2.cfg<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

Add the below lines for PM2 checking the configuration and save it.<\/p>\n\n\n\n

define service {
       use                             generic-service         ; Name of service template to use
       host_name                       testserver2
       service_description           pm2_service
       check_command              check_nrpe!check_pm2_port
       contact_groups                 admins
       notifications_enabled        1
       }<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

Step 8:<\/strong><\/p>\n\n\n\n

Save the configuration file.<\/p>\n\n\n\n

And finally, restart Nagios to apply the recent configuration changes:<\/p>\n\n\n\n

systemctl restart nagios<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

We can verify the PM2 status in the below snapshot.<\/p>\n\n\n\n

\"\"<\/a><\/figure>\n\n\n\n

Conclusion<\/strong><\/p>\n\n\n\n

Following the steps mentioned above, we can set up the PM2 service monitor on Nagios.<\/p>\n","protected":false},"excerpt":{"rendered":"

Introduction: To set up the PM2 service monitor on Nagios, you’ll need to follow these general steps. PM2 is a […]<\/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-7316","post","type-post","status-publish","format-standard","hentry","category-cloud-aws","psol-cat-cloud-aws"],"jetpack_publicize_connections":[],"jetpack_shortlink":"https:\/\/wp.me\/phn2x7-1U0","jetpack_sharing_enabled":true,"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/pheonixsolutions.com\/blog\/wp-json\/wp\/v2\/posts\/7316","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=7316"}],"version-history":[{"count":0,"href":"https:\/\/pheonixsolutions.com\/blog\/wp-json\/wp\/v2\/posts\/7316\/revisions"}],"wp:attachment":[{"href":"https:\/\/pheonixsolutions.com\/blog\/wp-json\/wp\/v2\/media?parent=7316"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/pheonixsolutions.com\/blog\/wp-json\/wp\/v2\/categories?post=7316"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/pheonixsolutions.com\/blog\/wp-json\/wp\/v2\/tags?post=7316"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}