How to monitor NGINX
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How to monitor: Nginx David Mytton Hangout on Air - Oct 2014 blog.serverdensity.com/monitor-nginx/
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Joined by Rick Nelson, Technical Solutions architect from NGINX Server Density take you though the do's and don'ts of monitoring NGINX. Critical and non critical metrics to monitor, important alerts to configure and the best monitoring tools available.
Transcript of How to monitor NGINX
How to monitor:Nginx
David MyttonHangout on Air - Oct 2014
blog.serverdensity.com/monitor-nginx/
David Mytton
Server Density Architecture
Server Density Architecture
● ~100 servers - Ubuntu 12.04
Server Density Architecture
● ~100 servers - Ubuntu 12.04
● 50:50 virtual/dedicated
Server Density Architecture
● ~100 servers - Ubuntu 12.04
● 50:50 virtual/dedicated
● 200TB/m processed data
Server Density Architecture
● ~100 servers - Ubuntu 12.04
● 50:50 virtual/dedicated
● Nginx, Python, MongoDB
● 200TB/m processed data
Key metrics
● Requests
● Connections
● Status codes
● Server performance
Key metrics
● Requests
● Connections
Key metrics
● Requests
● Connections
Vanity
Key metrics
● Requests
● Connections
Benchmark!
Vanity
ngx_http_stub_status_module
● --with-http_stub_status_module
location /basic_status { stub_status;}
ngx_http_stub_status_module
● --with-http_stub_status_module
Active connections: 291 server accepts handled requests 16630948 16630948 31070465 Reading: 6 Writing: 179 Waiting: 106
accepts should == handled
Key metrics
● Status codes
Status codes
● 2xx = Success
● 3xx = Redirect
● 4xx = Client error
● 5xx = Server error
Status codes
● Mostly 2xx/3xx
● Sudden spikes?
Status codes
server { access_log /var/log/nginx/access_log combined; ...}
Status codes
tail -f /var/log/nginx/access_log
Status codes
$ ngxtoprunning for 411 seconds, 64332 records processed: 156.60 req/sec
Summary:| count | avg_bytes_sent | 2xx | 3xx | 4xx | 5xx ||---------+------------------+-------+-------+-------+-------|| 64332 | 2775.251 | 61262 | 2994 | 71 | 5 |
github.com/lebinh/ngxtop
Key metrics
● Server performance
Server performance
● CPU / load average
● Networking (connections)
Server Density
ngx_http_status_module
● Nginx+
demo.nginx.com/status.html
ngx_http_status_module
● Server Density Plugin
serverdensity.com/nginx/
● Monitor backends, status codes, requests
● Recommended alerts
Summary
● Determine baseline key metrics
Key metrics
● Requests
● Connections
● Status codes
● Server performance
Summary
● Determine baseline key metrics
● Nginx metrics + server performance
Summary
● Determine baseline key metrics
● Nginx metrics + server performance
● Manual tools for real time
Summary
● Determine baseline key metrics
● Nginx metrics + server performance
● Manual tools for real time
● Set up a monitoring product
Useful resources
● http://nginx.org/en/docs/http/ngx_http_stub_status_module.html
● https://www.serverdensity.com/plugins/nginx
● https://blog.serverdensity.com/monitor-nginx
● http://nginx.org/en/docs/http/ngx_http_status_module.html
