fix(nodeimage): add SecurityContext to image creation and monitor containers

[dronenb]

Fixes #2138

[coderabbitai]

Walkthrough

Adds SecurityContext configurations to the node-joiner and node-joiner-monitor containers in the oc adm node-image command's pod specifications. Both containers now enforce non-root execution, disallow privilege escalation, and drop all default capabilities.

Changes

Cohort / File(s)	Change Summary
Security context enforcement pkg/cli/admin/nodeimage/create.go, pkg/cli/admin/nodeimage/monitor.go	Adds SecurityContext to container specs with AllowPrivilegeEscalation: false, RunAsNonRoot: true, and Capabilities.Drop: ["ALL"]

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~3 minutes

• Changes are localized to two files with identical security context configurations applied consistently across both containers.
• No logic changes, control flow modifications, or new functionality introduced.

Assessment against linked issues

Objective	Addressed	Explanation
Set SecurityContext on node-joiner container in create command [#2138]	✅
Set SecurityContext on node-joiner-monitor container in monitor command [#2138]	✅

✨ Finishing touches

• 📝 Generate docstrings

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment

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[openshift-ci]

[APPROVALNOTIFIER] This PR is NOT APPROVED

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[openshift-ci]

Hi @dronenb. Thanks for your PR.

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[coderabbitai]

Actionable comments posted: 0

🧹 Nitpick comments (1)

pkg/cli/admin/nodeimage/monitor.go (1)

290-296: LGTM! Security context correctly addresses PodSecurity violations.

The SecurityContext configuration properly satisfies the "restricted:latest" PodSecurity requirements identified in issue #2138. All three mandatory fields are present.

Consider extracting the identical SecurityContext configuration shared with create.go (lines 748-754) into a common helper function to reduce duplication.

Optionally, the boolean pointer pattern &[]bool{false}[0] could be replaced with more idiomatic Go:

SecurityContext: &corev1.SecurityContext{
    AllowPrivilegeEscalation: ptr.To(false),
    RunAsNonRoot:             ptr.To(true),
    Capabilities: &corev1.Capabilities{
        Drop: []corev1.Capability{"ALL"},
    },
},

This requires importing k8s.io/utils/ptr.

📜 Review details

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📥 Commits

Reviewing files that changed from the base of the PR and between 1c5f490 and 9318d57.

📒 Files selected for processing (2)

• pkg/cli/admin/nodeimage/create.go (1 hunks)
• pkg/cli/admin/nodeimage/monitor.go (1 hunks)

🧰 Additional context used

📓 Path-based instructions (1)

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

Files:

• pkg/cli/admin/nodeimage/create.go
• pkg/cli/admin/nodeimage/monitor.go

🔇 Additional comments (1)

pkg/cli/admin/nodeimage/create.go (1)

748-754: LGTM! Security context matches monitor.go implementation.

The SecurityContext correctly addresses the PodSecurity violations for the node-joiner container. See the review comment on monitor.go lines 290-296 for suggested refactors regarding code duplication and the boolean pointer pattern.