MGMT-22131: transitioning red hat operator base image to ubi minimal

[shay23bra]

update base image to ubi-minimal

[openshift-ci-robot]

@shay23bra: This pull request references MGMT-22131 which is a valid jira issue.

Warning: The referenced jira issue has an invalid target version for the target branch this PR targets: expected the task to target the "4.22.0" version, but no target version was set.

Details

In response to this:

update base image to ubi-minimal

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[coderabbitai]

Walkthrough

Dockerfile base image changed from OpenShift to Red Hat UBI minimal. Package manager transitioned from dnf to microdnf. Final stage now includes copying the server binary from the builder stage, configuring a non-root user (65532:65532), setting GODEBUG and GOGC environment variables, and defining an ENTRYPOINT.

Changes

Cohort / File(s)	Summary
Dockerfile Updates Dockerfile	Base image changed from registry.ci.openshift.org/ocp/4.20:base-rhel9 to registry.access.redhat.com/ubi9/ubi-minimal:latest@sha256:...; package manager updated from dnf to microdnf; final stage now includes server binary copy, non-root user configuration (65532:65532), environment variables (GODEBUG, GOGC), and ENTRYPOINT directive

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~8 minutes

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📥 Commits

Reviewing files that changed from the base of the PR and between bfda1b6 and 72dc68f.

📒 Files selected for processing (1)

• Dockerfile

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-Focus on major issues impacting performance, readability, maintainability and security. Avoid nitpicks and avoid verbosity.

Files:

• Dockerfile

🔇 Additional comments (3)

Dockerfile (3)

22-22: LGTM - Base image change with digest pinning.

Good use of SHA256 digest pinning for reproducible builds. The UBI minimal image reduces attack surface and image size.

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27-27: LGTM - Correct package manager for ubi-minimal.

Using microdnf is appropriate for the UBI minimal base image, and the cleanup step helps minimize image size.

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30-36: No action needed — server binary is actively used in deployment manifests.

The server binary is invoked in separate container definitions within the Kubernetes manifests (config/manager/manager.yaml and bundle/manifests/image-based-install-operator.clusterserviceversion.yaml). The COPY instruction on line 31 is necessary and should be retained.

Likely an incorrect or invalid review comment.

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[openshift-ci]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: shay23bra
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[shay23bra]

/retest

[giladravid16]

/test e2e-ibio ibio-reinstall

[openshift-ci]

@shay23bra: all tests passed!

Full PR test history. Your PR dashboard.

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[giladravid16]

/lgtm