OCPBUGS-66314: Add hostIP 127.0.0.1 to machine-config-daemon port 8798

[aabughosh]

- What I did
Added hostIP: 127.0.0.1 to the machine-config-daemon container port 8798 in the DaemonSet manifest. This explicitly indicates that the health port is bound only to the localhost interface and is not externally exposed.

[yuqi-zhang]

Seems fine to me. Would this need to be backported? If not we can merge as no-jira, otherwise we should create a bug for it.

[aabughosh]

Seems fine to me. Would this need to be backported? If not we can merge as no-jira, otherwise we should create a bug for it.

yes we need to backport

[openshift-ci-robot]

@aabughosh: This pull request references MCO-2000 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 bug to target the "4.21.0" version, but no target version was set.

In response to this:

- What I did
Added hostIP: 127.0.0.1 to the machine-config-daemon container port 8798 in the DaemonSet manifest. This explicitly indicates that the health port is bound only to the localhost interface and is not externally exposed.

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the openshift-eng/jira-lifecycle-plugin repository.

[openshift-ci-robot]

@aabughosh: This pull request references Jira Issue OCPBUGS-66314, which is valid. The bug has been moved to the POST state.

3 validation(s) were run on this bug

• bug is open, matching expected state (open)
• bug target version (4.21.0) matches configured target version for branch (4.21.0)
• bug is in the state New, which is one of the valid states (NEW, ASSIGNED, POST)

The bug has been updated to refer to the pull request using the external bug tracker.

In response to this:

- What I did
Added hostIP: 127.0.0.1 to the machine-config-daemon container port 8798 in the DaemonSet manifest. This explicitly indicates that the health port is bound only to the localhost interface and is not externally exposed.

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the openshift-eng/jira-lifecycle-plugin repository.

[yuqi-zhang]

/lgtm

MCD pods look fine. Could you explain here or on the bug why this is needed and how to verify?

[openshift-ci]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: aabughosh, yuqi-zhang

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[aabughosh]

checked the daemon pods
name: machine-config-daemon
ports:
- containerPort: 8798
hostIP: 127.0.0.1
hostPort: 8798
name: health
protocol: TCP
and this is the right behavior

[aabughosh]

/verified by @aabughosh

[openshift-ci-robot]

@aabughosh: This PR has been marked as verified by @aabughosh.

In response to this:

/verified by @aabughosh

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[aabughosh]

/retest

[aabughosh]

/retest

[yuqi-zhang]

/label acknowledge-critical-fixes-only

I believe this is critical to networking, so will apply this label. We believe this is safe to merge

[openshift-ci-robot]

/retest-required

Remaining retests: 0 against base HEAD 8e6beb0 and 2 for PR HEAD 3d32332 in total

[openshift-ci-robot]

/retest-required

Remaining retests: 0 against base HEAD 5051cce and 1 for PR HEAD 3d32332 in total

[openshift-ci]

@aabughosh: The following test failed, say /retest to rerun all failed tests or /retest-required to rerun all mandatory failed tests:

Test name	Commit	Details	Required	Rerun command
ci/prow/bootstrap-unit	3d32332	link	false	/test bootstrap-unit

Full PR test history. Your PR dashboard.

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[openshift-ci-robot]

@aabughosh: Jira Issue Verification Checks: Jira Issue OCPBUGS-66314
✔️ This pull request was pre-merge verified.
✔️ All associated pull requests have merged.
✔️ All associated, merged pull requests were pre-merge verified.

Jira Issue OCPBUGS-66314 has been moved to the MODIFIED state and will move to the VERIFIED state when the change is available in an accepted nightly payload. 🕓

In response to this:

- What I did
Added hostIP: 127.0.0.1 to the machine-config-daemon container port 8798 in the DaemonSet manifest. This explicitly indicates that the health port is bound only to the localhost interface and is not externally exposed.

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the openshift-eng/jira-lifecycle-plugin repository.

[openshift-merge-robot]

Fix included in accepted release 4.21.0-0.nightly-2025-12-08-112148

[aabughosh]

/cherry-pick release-4.20

[openshift-cherrypick-robot]

@aabughosh: new pull request created: #5474

In response to this:

/cherry-pick release-4.20

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