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@buildkite-systems buildkite-systems released this 29 Sep 08:14
· 2 commits to main since this release
v0.51.0
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v0.51.0 (2026-09-29)

Full Changelog

Breaking configuration changes

This release completes the Agent v4 migration started in v0.50.0. Before upgrading, update any affected agent-config keys:

  • Replace tracing-backend: opentelemetry with opentelemetry-tracing: true.
  • Rename tracing-service-name to telemetry-service-name.
  • Remove trace-context-encoding.
  • Remove tracing-propagate-traceparent (trace propagation is always enabled in Agent v4).

The controller rejects unknown configuration fields and will fail to start if the old keys remain. Users who don't configure these fields don't need to make any changes.

Fixed

  • Updated telemetry configuration and cancellation timeout handling to use the Agent v4 names and semantics. #973 (@tomowatt)

Images

Helm chart

Image: public.ecr.aws/buildkite/helm/agent-stack-k8s:0.51.0
Image: ghcr.io/buildkite/helm/agent-stack-k8s:0.51.0
Digest: sha256:0d1cf116fe75521f4a1dc13efed561dee9e81b99cf52158ce5d3ae9fe41433ff

Controller

Image: public.ecr.aws/buildkite/agent-stack-k8s/controller:0.51.0
Image: ghcr.io/buildkite/agent-stack-k8s/controller:0.51.0
Digest: sha256:946160fe85fcc0df51a67c61914b79ae2a1e1c71d2718d7aca222a26c2f7bd52

Agent

Image: ghcr.io/buildkite/agent:4.0.3
Digest: sha256:29de583633d7597c527faa104d0ecaae1adcfd3663555de32d0bde0eca833817

Contributors

tomowatt
Assets 5
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