Update docker/setup-buildx-action action to v4 - autoclosed

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
docker/setup-buildx-action	action	major	v3 → v4

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Warning

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Release Notes

docker/setup-buildx-action (docker/setup-buildx-action)

v4

Compare Source

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Configuration

📅 Schedule: Branch creation - "after 2am and before 8am on monday" in timezone America/New_York, Automerge - At any time (no schedule defined).

🚦 Automerge: Disabled by config. Please merge this manually once you are satisfied.

♻ Rebasing: Whenever PR is behind base branch, or you tick the rebase/retry checkbox.

🔕 Ignore: Close this PR and you won't be reminded about this update again.

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[github-actions]

docker/setup-buildx-action v3 -> v4

Risk: 🟠 Breaking | CI: Failing | Confidence: High

The Deep Dive

Update Scope

• docker/setup-buildx-action v3 (8d2750c6) -> v4 (4d04d5d9) -- major version bump
• Single file changed: .github/workflows/ansible-integration-test.yaml
• Runtime upgraded from Node 20 to Node 24

Features & UX

• Node 24 runtime (#483): The action now runs on Node 24 instead of Node 20. Requires Actions Runner v2.327.1+. GitHub-hosted runners already meet this requirement, so no action needed.

Key Fixes

• Internal dependency bumps (@actions/core 1.11.1 -> 3.0.0, @docker/actions-toolkit 0.63.0 -> 0.79.0, lodash, minimatch, js-yaml). These are internal to the action and don't change the external interface.

Security

No security advisories found for docker/setup-buildx-action. No CVEs in this version range.

Newer Versions

v4.0.0 is the latest release (published 2026-03-05). No newer versions exist. No known regressions reported.

Hazards & Risks

BREAKING: Removed install input -- causes CI failure.

The install input was deprecated in v3 and removed in v4. The workflow at .github/workflows/ansible-integration-test.yaml:39 passes install: true, which previously ran docker buildx install to alias docker build to docker buildx build.

With v4, this input is silently ignored. The docker build command on line 61 then uses the default docker driver instead of the buildx driver. This causes the CI failure:

ERROR: failed to build: Cache export is not supported for the docker driver.

The --cache-to=type=local,dest=/tmp/.buildx-cache-new flag requires the buildx driver. Both ansible-integration-test matrix jobs fail (arm64 fails, amd64 is cancelled).

Required fix: Replace install: true with the BUILDX_BUILDER environment variable approach, or change docker build to docker buildx build in the workflow.

Also removed: config and config-inline inputs (replaced by buildkitd-config and buildkitd-config-inline in v3). The workflow does not use these, so no impact.

Sources

• v4.0.0 release notes
• Remove deprecated inputs/outputs
• Node 24 runtime
• CI failure log

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🟠 Verdict: Breaking

The removed install input breaks the ansible-integration-test CI workflow. The workflow must be updated to remove install: true and either use docker buildx build directly or set the BUILDX_BUILDER env var before this PR can be merged.