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@pager/metrics-client
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Hapi-centric Prometheus Plugin and optional endpoint
Use this plugin to:
/metrics
).metrics
in request contexts)/metrics
on port 3000
)Once metric-client is a Hapi-centric Prometheus Plugin. Hapi and metrics-client modules need to be installed.
npm install -S @hapi/hapi
npm install -S @pager/metrics-client
Sample usage for metrics-client server
'use strict';
const Hapi = require('@hapi/hapi');
const Metrics = require('@pager/metrics-client');
const startServer = async () => {
const server = await new Hapi.Server({
port: 3000
});
await server.register([
{
plugin: Metrics
}
]);
await server.start();
console.log( `Server started at ${ server.info.uri }`);
return server;
};
module.exports = startServer();
annotations:
prometheus.io/scrape: "true"
prometheus.io/port: {{ .Values.service.internalPort | quote }}
Readiness probes are designed to let Kubernetes know when your app is ready to serve traffic. Similarly, liveness probes let Kubernetes know if your app is alive or dead. Metric-client plugin is also support health check and needs to be added to the deployment file under container details.
livenessProbe:
httpGet:
path: /health
port: {{ .Values.service.internalPort }}
initialDelaySeconds: 15
timeoutSeconds: 1
readinessProbe:
httpGet:
path: /health
port: {{ .Values.service.internalPort }}
initialDelaySeconds: 15
timeoutSeconds: 1
Prometheus server Kubernetes service discovery configuration is going to search running server on kubernetes cluster. It will use default server port 3000
. Thus, metrics-client must start at default port 3000
. If the server is not already running on port 3000
, it should be added on containers details.
env:
- name: PORT
value: "3000"
Health endpoint is designed to provide information about a readiness and liveness of the server. On the other hand, metrics endpoint provides information about the performance of the server such as load time, response time, memory usage, CPU usage etc.
Metrics List |
---|
cpu_user_time |
cpu_user_utilization |
cpu_system_time |
cpu_system_utilization |
event_loop_usage |
event_loop_wait |
memory_physical |
memory_heap_used |
memory_heap_free |
memory_heap_max |
memory_nonheap_used |
http_request_duration_milliseconds |
http_request_buckets_milliseconds |
gc_pause_time_min |
gc_pause_time_max |
gc_pause_time_total |
gc_scavenge_min |
gc_scavenge_max |
gc_scavenge_total |
gc_marksweepcompact_min |
gc_marksweepcompact_max |
gc_marksweepcompact_total |
gc_incrementalmarking_min |
gc_incrementalmarking_max |
gc_incrementalmarking_total |
FAQs
Hapi Prometheus Plugin and optional endpoint
The npm package @pager/metrics-client receives a total of 537 weekly downloads. As such, @pager/metrics-client popularity was classified as not popular.
We found that @pager/metrics-client demonstrated a not healthy version release cadence and project activity because the last version was released a year ago. It has 46 open source maintainers collaborating on the project.
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