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Monit nodejs code#
How to test nodejs backend code with Karma (testacular).How can i monitor network activity with nodejs (puppeteer).Stop the node.js application with ctrl-c.
![monit nodejs monit nodejs](https://i.stack.imgur.com/oKARu.png)
![monit nodejs monit nodejs](https://raw.githubusercontent.com/Unitech/pm2/master/pres/pm2-ls-multi.png)
# HELP process_resident_memory_bytes Resident memory size in bytes. # HELP process_start_time_seconds Start time of the process since unix epoch in seconds. # HELP process_cpu_seconds_total Total user and system CPU time spent in seconds. # TYPE process_cpu_system_seconds_total counter
![monit nodejs monit nodejs](https://impactotecno.files.wordpress.com/2017/01/captura-de-pantalla-de-2017-01-27-093409.png)
# HELP process_cpu_system_seconds_total Total system CPU time spent in seconds. # TYPE process_cpu_user_seconds_total counter # HELP process_cpu_user_seconds_total Total user CPU time spent in seconds.
Monit nodejs install#
Go to the directory where the server.js file is located and run the following command to install and configure a prom-client - a Node.js client library for Prometheus. Instrument application code with Node.js client library for Prometheus ¶ These metrics also capture an error rate that is expressed as a proportion of request rate. Rate, Errors and Duration attempt to cover the most obvious web service issues. (Request) Duration - The amount of time each request takes expressed as a time interval.(Request) Errors - the number of failed requests per second.(Request) Rate - the number of requests, per second, your services are serving.With the RED method, three key metrics are instrumented that monitor every microservice in your architecture: The RED method follows on the principles outlined in the Four Golden Signals developed by Site Reliability Engineers, which focuses on measuring things that end-users care about when using your web services. The metrics you choose simplifies troubleshooting when a problem occurs and also enables you to stay on top of the stability of your services and infrastructure. One of the most important decisions to make when setting up web application monitoring is deciding on the type of metrics you need to collect about your app. Node.js monitoring instrumentation What to instrument - the RED method ¶