grafana-agent 0.38.0

[grafanabot]

action-homebrew-bump-formula

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Created with brew bump-formula-pr.

release notes

This is release `v0.38.0` of Grafana Agent.
v0.38.0 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

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