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How it works

AAGM already ships a Prometheus and its Pushgateway. https://apiida.atlassian.net/wiki/spaces/AAGM/pages/7760183321/Installation#Install-using-Docker-Compose
Once set up successfully, everything should connect automatically and start collecting metrics from APIs registered in AAGM.

Here is a diagram of how the individual components work together.

Prometheus Configuration

This configuration is already integrated in the supplied Prometheus.

https://prometheus.io/docs/prometheus/latest/configuration/configuration/

Prometheus automatically pulls the metrics of all its targets every few seconds.

global:
  scrape_interval: 15s

  external_labels:
    monitor: 'codelab-monitor'

scrape_configs:
  - job_name: 'prometheus'
    static_configs:
      - targets: [ 'host.docker.internal:9090' ]

  - job_name: 'aagmdb'
    static_configs:
      - targets: [ 'host.docker.internal:9104' ]

  - job_name: 'prometheus-pushgateway'
    scrape_interval: 1s
    honor_labels: true
    static_configs:
      - targets: [ 'host.docker.internal:9091' ]

Using an external Prometheus

• The url of Prometheus and the Prometheus Pushgateway must be stored in the configuration of AAGM under General settings.

• Prometheus must receive the Pushgateway as target as in line 16 above.

• Optionally, the database of AAGM can also be added. https://grafana.com/oss/prometheus/exporters/mysql-exporter/

View metrics directly in Prometheus

Here are a few examples of how to retrieve metrics directly in Prometheus.

Example: Nodes

• cpuLoadPercentage{name="Docker GW 1"}

• memoryLoadPercentage{hostPort="host.docker.internal:8444"}

• cpuLoadPercentage

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Example: APIs

• allRequestsCount{name="APIIDA Metrics API"}

• allRequestsCount{job="Docker GW 1 APIIDA Metrics API"}

• allRequestsCount{nodeID="2"}

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Jobs, Labels and Metric Names

https://prometheus.io/docs/concepts/data_model/#metric-names-and-labels https://prometheus.io/docs/concepts/jobs_instances/

All possible filters can also be viewed here or directly on the PushGateway.

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Jobs

The name of the job consists of the name of the gateway and the name of the API.

Labels

Enable the Prometheus dimensional data model to identify any combination of labels for the same metric name.

• id

  • Id of the API or Node

• name

  • Name of the API or Node

• nodeId

  • Id of the node on which the API is running

• type

  • Type of job, either “api” or “node”. Influences which metrics are available.

Metric Names

Specify the general characteristic of a system that is being measured

All Metric Names for Label type=api

• allRequestsCount

• averageBackendResponseTimeMillis

• averageFrontendResponseTimeMillis

• maxBackendResponseTimeMillis

• maxFrontendResponseTimeMillis

• minBackendResponseTimeMillis

• minFrontendResponseTimeMillis

• policyViolationCount

• routingFailureCount

• successfulRequestsCount

All Metric Names for Label type=node

• cpuLoadPercentage

• memoryLoadPercentage

• diskSpacePercentage

• totalDiskSpaceMB

• freeDiskSpaceMB

• sqlDelay

Grafana

Grafana supports the Prometheus query. The Grafana data source for Prometheus is included since Grafana 2.5.0 https://prometheus.io/docs/visualization/grafana/#grafana-support-for-prometheus

Grafana user: admin pass: admin

Links

https://prometheus.io/

https://github.com/prometheus/pushgateway

https://packagist.org/packages/promphp/prometheus_push_gateway_php

https://grafana.com/