Overview of Logging and Metrics

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This topic provides an overview of logging and metrics in VMware Tanzu Application Service for VMs (TAS for VMs). It includes information about logs and metrics sources and transport systems. It also lists products for viewing logs and metrics.

Sources of Logs and Metrics

There are two sources of TAS for VMs logs and metrics:

  • TAS for VMs platform components, such as a Diego Cell, MySQL Server, or Cloud Controller
  • Apps and app containers deployed on TAS for VMs

The table below describes the data included in logs and metrics from each source:

Source Logs Data Metrics Data
Platform components Logs from TAS for VMs components
  • Health metrics from BOSH-deployed VMs1
  • Platform metrics from TAS for VMs components. For example, Diego Cell capacity remaining and Gorouter throughput.
  • Metrics for any service tile that self-publishes to the Loggregator Firehose. For example, Redis and MySQL.
Apps and app containers Logs from apps2
  • Container metrics3
  • Custom app metrics4

1For more information about using the BOSH Health Monitor to collect health metrics on VMs, see Configuring a Monitoring System.

2For more information about app logging, see App Logging in TAS for VMs.

3For more information about container metrics, see Container Metrics.

4For more information about configuring an app to stream custom metrics to Loggregator, see Metrics Forwarder.

Transport Systems for Logs and Metrics

The following transport systems deliver logs and metrics from their source to an observability product for viewing:

  • Loggregator: Loggregator is the transport system for both logs and metrics on apps deployed on TAS for VMs, as well as metrics on TAS for VMs platform components. For more information about the Loggregator system, including Loggregator architecture and components, see Overview of the Loggregator System.

  • rsyslogd on TAS for VMs component VMs: rsyslogd is the transport system for TAS for VMs component logs. Users can configure rsyslogd to transport component logs to a third-party syslog server.

The table below lists the transport system for logs and metrics on TAS for VMs platform components and apps:

Source Logs Transport System Metrics Transport System
Platform components rsyslogd on TAS for VMs component VMs Loggregator
Apps Loggregator Loggregator

Viewing Logs and Metrics

The table below lists the products and tools for viewing TAS for VMs logs and metrics:

Source Products and Tools for Viewing Logs Products and Tools for Viewing Metrics
Platform components To view system logs from TAS for VMs components, configure rsyslogd to transport logs to a third-party product. You can use the following products or tools to view platform component and VM metrics:
Apps You can use the following products or tools to view app logs: You can use the following products or tools to view app metrics: