@aftonbladet/argos NPM

argos - Node process and @aftonbladet/loading-cache monitoring

About the name

Argus Panoptes or Argos was a hundred-eyed giant in Greek mythology. He was a giant, the son of Arestor, whose name "Panoptes" meant "the all-seeing one". His main task was to guard Io.

Source

Usage

Configure some environment variables:

VARIABLE	Description	Mandatory	Default	Example
ARGOS_ENABLED	Set to `true` or `yes` to enable argos	Yes		`true`
ARGOS_JOB_NAME	The prometheus job name	Yes		`iris-stage`
ARGOS_INSTANCE	The prometheus instance name	No	$BOXFUSE_INSTANCE_ID or `local`	`worker-0`
ARGOS_GATEWAY_URL	The prometheus push gateway URL	No	`http://prometheus-pushgateway.local.net:9091`	`http://prometheus-pushgateway-prod.aftonbladet.io:9091`
ARGOS_METRIC_PREFIX	A prefix that is added to all created metric names	No	`''`	`iris_`
ARGOS_METRIC_HELP_PREFIX	A prefix that is added to all help texts	No	`Metrics for`	`Iris metrics for`
ARGOS_PUSH_INTERVAL	How often in milliseconds to push to the prometheus gateway	No	10000	3000
ARGOS_PERFORM_CLEANUP	If all metrics matching the job name are to be deleted from the push gateway on startup. This also tries to remove the added metrics on shutdown.	No	true	false

Add the following as early as possible in your code:

require('@aftonbladet/argos');

Monitor an @aftonbladet/loading-cache

Use the monitored eviction strategy and remember to specify a name:

import LoadingCache from '@aftonbladet/loading-cache';
import { MonitoredLruEvictionStrategy } from '@aftonbladet/argos';

const cache = new LoadingCache({
    evictionStrategy: new MonitoredLruEvictionStrategy({
        maxEntries: articleApiCacheMaxEntries,
        maxAge: articleApiCacheTtl,
        name: 'article_api_cache',
    }),
});