{"id":19256,"date":"2015-04-24T09:50:26","date_gmt":"2015-04-24T04:20:26","guid":{"rendered":"https:\/\/tothenewco.pro\/blog\/?p=19256"},"modified":"2015-04-28T12:37:00","modified_gmt":"2015-04-28T07:07:00","slug":"monitoring-nginx-connections","status":"publish","type":"post","link":"https:\/\/tothenewco.pro\/blog\/monitoring-nginx-connections\/","title":{"rendered":"Monitoring Nginx Connections"},"content":{"rendered":"

The Nginx web server comes with a bundled module “HttpStubStatusModule”. By enabling this module we will get some insight of our nginx connections. This module provides the following information.
\n<\/p>\n

Active Connections<\/h3>\n

Connection Status (Accepted \/ Handled)<\/h3>\n

Connection Request \/ Second<\/h3>\n

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

Enable Module<\/strong>
\nTo get connection stats, we need to enable the status module on nginx VirtualHost<\/strong> file by adding below localtion block.
\n[js]
\nlocation \/nginx_status {
\n # Turn on stats
\n stub_status on;
\n allow 127.0.0.1;
\n deny all;
\n}<\/p>\n

Replace 127.0.0.1 with the IP from which you wants to access \/nginx_status
\n[\/js]
\n[js]$ sudo service nginx reload [\/js]
\n[js]$ curl localhost\/nginx_status [\/js]<\/p>\n

[js]
\nActive connections: 32
\nserver accepts handled requests
\n48932 48932 2594381
\nReading: 0 Writing: 2 Waiting: 30
\n[\/js]<\/p>\n

Let’s break down the above parts.<\/p>\n

1. Active Connections (Number of Active Connection): <\/h3>\n

This will give all open connections. This doesn’t mean number of users on site.<\/p>\n

2. Server accepts handled requests:<\/h3>\n

We have three values for this.
\n
\nFirst Column: 48392 ( Total Accepted Connection by Web Server )
\nSecond Column: 48932 ( Total Connections handled by Web Server )
\nThird Column : 2594381 ( Number of handled requests )
\n<\/em><\/p>\n

If we divide third column by second column, we’ll get the number of requests \/ second<\/p>\n

Hence, <\/p>\n

Number of Requests\/Second = 2595381 \/ 48392 = 53.63 <\/h6>\n

requests is being served per second by nginx.<\/p>\n

You can also use the below script and execute it as a cron and check Connection Status on a timely basis.<\/p>\n

[js]<\/p>\n

#!\/bin\/bash<\/p>\n

numberOfActiveConnections=""
\nnumberOfTotalAcceptedConnections=""
\nnumberOfTotalhandledConnections=""<\/p>\n

#Number of Requests \/ Second
\nnumberOfRequestsPerSecond=""<\/p>\n

nginxPath=’nginx_status’<\/p>\n

ApplicationURL=’ List of IPAddress\/DomainName separated by Space ‘<\/p>\n

echo $ApplicationURL<\/p>\n

for URL in ${ApplicationURL[@]};do<\/p>\n

file="$URL"
\n echo "Getting Nginx Status Page of $URL"<\/p>\n

curl -s $URL\/$nginxPath -o $file<\/p>\n

numberOfActiveConnections=$(cat $file | awk ‘\/Active \/’ | awk ‘{print $3}’)
\n echo "$file : Active Connection $numberOfActiveConnections"<\/p>\n

numberOfTotalAcceptedConnections=$(cat $file | grep -A 1 server | tail -1 | awk ‘{print $1}’)
\n echo "$file : Total Accepted Connection $numberOfTotalAcceptedConnections"<\/p>\n

numberOfTotalhandledConnections=$(cat $file | grep -A 1 server | tail -1 | awk ‘{print $2}’)
\n echo "$file : Total Handled Connection $numberOfTotalhandledConnections"<\/p>\n

echo "Number of Accepted and Handle remains same most of the time."
\n totalRequests=$(cat $file | grep -A 1 server | tail -1 | awk ‘{print $3}’)<\/p>\n

numberOfRequestsPerSecond=$(echo ‘scale=2;’$totalRequests\/$numberOfTotalAcceptedConnections | bc -l)
\n echo "Currently Server is serving $numberOfRequestsPerSecond \/ second."<\/p>\n

echo "—————————————————————————————————————"<\/p>\n

done<\/p>\n

[\/js]<\/p>\n

Output will be like: <\/p>\n

Getting Nginx Status Page of Application URL
\nApplication URL : Active Connection 39
\nApplication URL : Total Accepted Connection 62032
\nApplication URL : Total Handled Connection 59739
\nNumber of Accepted and Handle remains same most of the time.
\nCurrently Server is serving 43.02 \/ second.
\n<\/strong>
\nLeave a comment if you have any questions regarding this article.<\/p>\n","protected":false},"excerpt":{"rendered":"

The Nginx web server comes with a bundled module “HttpStubStatusModule”. By enabling this module we will get some insight of our nginx connections. This module provides the following information. Active Connections Connection Status (Accepted \/ Handled) Connection Request \/ Second Enable Module To get connection stats, we need to enable the status module on nginx […]<\/p>\n","protected":false},"author":100,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"iawp_total_views":51,"footnotes":""},"categories":[1],"tags":[519,1499,1336],"class_list":["post-19256","post","type-post","status-publish","format-standard","hentry","category-technology","tag-bash-script","tag-monitoring","tag-nginx"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t