Selecting and Configuring a Monitoring System
This topic describes considerations for selecting and configuring a system to continuously monitor Pivotal Cloud Foundry (PCF) component performance and health.
Many third-party systems can also be used to monitor a PCF deployment.
Monitoring platforms support two types of monitoring:
- A dashboard for active monitoring when you are at a keyboard and screen
- Automated alerts for when your attention is elsewhere
Some monitoring solutions offer both in one package. Others require putting the two pieces together.
There are many monitoring options available, both open source and commercial products. Some commonly-used platforms among PCF customers include.
PCF Healthwatch by Pivotal
PCF Partner Services available on Pivotal Network:
Open Source Tooling: Prometheus + Grafana
The Pivotal Cloud Ops Team manages two types of deployments for internal Pivotal use: open-source Cloud Foundry, and Pivotal Cloud Foundry (PCF).
For Cloud Foundry, Pivotal Cloud Ops uses several monitoring tools. The Datadog Config repository provides an example of how the Pivotal Cloud Ops team uses a customized Datadog dashboard to monitor the health of its open-source Cloud Foundry deployments.
Most monitoring service tiles for PCF come packaged with the Firehose nozzle necessary to extract the BOSH and CF metrics leveraged for platform monitoring.
The nozzles gather the component logs and metrics streaming from the Loggregator Firehose endpoint. As of PCF v2.0, both BOSH VM Health metrics and Cloud Foundry component metrics stream through the Firehose by default.
- PCF component metrics originate from the Metron agents on their source components, then travel through Dopplers to the Traffic Controller.
- The Traffic Controller aggregates both metrics and log messages system-wide from all Dopplers, and emits them from its Firehose endpoint.
The following topic list high-signal-value metrics and capacity scaling indicators in a PCF deployment:
PCF includes smoke tests, which are functional unit and integration tests on all major system components. By default, whenever an operator upgrades to a new version of PAS, these smoke tests run as a post-deploy errand.
Pivotal recommends additional higher-resolution monitoring via execution of continuous smoke tests, or Service Level Indicator tests, that measure user-defined features and check them against expected levels.
- PCF Healthwatch automatically executes these tests for PAS Service Level Indicators.
- The Pivotal Cloud Ops CF Smoke Tests repository offers additional testing examples.
See the Metrics topic in the Concourse documentation for how to set up Concourse to generate custom component metrics.
To properly configure your monitoring dashboard and alerts, you need to establish what thresholds should drive alerting and red/yellow/green dashboard behavior.
Some key metrics have more fixed thresholds, with similar threshold numbers numbers recommended across different foundations and use cases. These metrics tend to revolve around the health and performance of key components that can impact the performance of the entire system.
Other metrics of operational value are more dynamic in nature. This means that you must establish a baseline and yellow/red thresholds suitable for your system and its use cases. You can establish initial baselines by watching values of key metrics over time and noting what seems to be a good starting threshold level that divides acceptable and unacceptable system performance and health.
Effective platform monitoring requires continuous evolution.
After you establish initial baselines, Pivotal recommends that you continue to refine your metrics and tests to maintain the appropriate balance between early detection and reducing unnecessary alert fatigue. The dynamic measures recommended in Key Performance Indicators & Key Capacity Scaling Indicators should be revisited on occasion to ensure they are still appropriate to the current system configuration and its usage patterns.