v0.38.0-rc.0

This is release v0.38.0-rc.0 of Grafana Agent.

v0.38.0-rc.0 is a huge release, with many new features, improvements, and bugfixes. This page only covers a very small portion of those changes. For a full list of changes, refer to our CHANGELOG.

Upgrading

Read the relevant upgrade guides for specific instructions on upgrading from older versions:

• Static mode upgrade guide
• Static mode Kubernetes operator upgrade guide
• Flow mode upgrade guide

Notable changes

Breaking changes

• The deprecated otelcol.exporter.jaeger component has been removed as scheduled in v0.36.
• Some metrics for the mysqld exporter integration ahve been removed or renamed.

Features

• New flow mode components:
  • otelcol.processor.filter filters OTLP telemetry data using OpenTelemetry Transformation Language (OTTL).
  • otelcol.receiver.vcenter receives metrics telemetry data from vCenter.
• Changes to River:
  • River now supports "raw strings" to avoid needing to escape special characters.
  • River now permits using [] to access non-existent keys in an object, rather than generating an error.

Enhancements

• Improvements to log collection in flow mode:
  • Improve detection of rolled log files in loki.source.kubernetes and loki.source.podlogs.
  • Clustering is now supported in loki.source.kubernetes and loki.source.podlogs.
  • Added support for replaying unsent data for loki.write when WAL is enabled.
• Improvements to the flow controller:
  • Improved resilience of graph evaluation in presence of slow components.

Installation

Refer to our installation guides for how to install the variants of Grafana Agent:

• Install static mode
• Install the static mode Kubernetes operator
• Install flow mode