prom-client | Prometheus client for node.js | Runtime Evironment library

I am sorry for the newbie question, but I have been figuring out this error, I have an Express app and I am trying to run it as a docker container. I've used this Dockerfile:

I have a NodeJS application, and I want to expose the default metrics. I have the following implementation. I am using the prom-client package.

I have just registered some metrics in a NestJS application, through a typescript decorator. I use the prom-client package, but although I can log the metrics registered, the endpoint is not exposing those, and the Prometheus docker instance that I use to show all metrics, are not showing those neither.

how can I do to view registered metrics in /metrics endpoint and the Prometheus dashboard?

I am using node.js package prom-client to try to push different custom metrics to the Prometheus Pushgateway server.

The code is working and now I am writing the test code for the functionality. I wonder whether there is a way to mock the Prometheus Pushgateway server?

I had tried to use a normal express API server (like the following)

I have set up prom-client (unofficial client library for prometheus) to collect custom metrics what I need. I have prometheus server deployed from helm following this eks setup guide. Now I am trying to edit default configmap to collect my app metrics as well, but getting error

parsing YAML file /etc/config/prometheus.yml: yaml: unmarshal errors:\n line 22: field cluster_ip not found in type kubernetes.plain\n line 25: cannot unmarshal !!strdefaultinto []string

This is what I have done as per docs prometheus.yaml configmap file

I'm refactoring two old Javascript services into Typescript. I have updated all of the NPM dependencies accordingly and those that are deprecated have been replaced by other packages or have been removed entirely. Now I'm running into the following;

When I install the package prom-client and use import prom from 'prom-client' the module is not found. The package contains a index.d.ts typings file. If I manually add a folder prom-client within node_modules/@types the module is found with the import statement.

• I know that I can use require(), but I use import syntax everywhere so I rather not use require().

• There is no @types/prom-client package which is there for example @types/express.

• Using NodeJS 12.16.1 and es2020.
• Syntax like import * as prom from 'prom-client' do not work.
• I tried reinstalling all the packages a few times without result.
• On code-sandbox the import prom from 'prom-client' statement does work. But I can't see the difference.

How can I import prom-client accordingly?

I have a node express app with prom-client to monitor a serial connection and report the values to a http endpoint, the serial speed is 9600baud and is transferring some statistics over. A Prometheus instance is configured with a job 10milliseconds interval to target that end point and grab the metrics. I want to be able to see this metrics in at least 10 milliseconds resolution but it seems the Prometheus graph resolution does not accepts less than 1 seconds. What should I do to get Prometheus collect data with at least 10 milliseconds res. Is there a config I miss? I have searched for hours

this is my node js app, a serial port listener is waiting for json messages, parses them and updates gauge metric types from 'prom-client' to be represented by express!

I have been trying to configure prometheus to show metrics in grafana for my nodejs application. For metrics, I am using prom-client. However, on localhost I get always following error: