When there is a problem while rebooting a node, a MCDRebootError alarm is risen. This alarm disappears after 15 minutes, even if the machine was not rebooted.

$ oc get clusterversion
NAME      VERSION                              AVAILABLE   PROGRESSING   SINCE   STATUS
version   4.13.0-0.nightly-2022-12-22-120609   True        False         26m     Cluster version is 4.13.0-0.nightly-2022-12-22-120609

Always

1. Execute these commands in a worker node in order to break the reboot process.

$ mount -o remount,rw /usr
$ mv /usr/bin/systemd-run /usr/bin/systemd-run2

2. Creat any MC. For example, this one:

apiVersion: machineconfiguration.openshift.io/v1
kind: MachineConfig
metadata:
  labels:
    machineconfiguration.openshift.io/role: worker
  name: test-file
spec:
  config:
    ignition:
      version: 3.1.0
    storage:
      files:
      - contents:
          source: data:text/plain;charset=utf;base64,c2VydmVyIGZvby5leGFtcGxlLm5ldCBtYXhkZWxheSAwLjQgb2ZmbGluZQpzZXJ2ZXIgYmFyLmV4YW1wbGUubmV0IG1heGRlbGF5IDAuNCBvZmZsaW5lCnNlcnZlciBiYXouZXhhbXBsZS5uZXQgbWF4ZGVsYXkgMC40IG9mZmxpbmUK
        filesystem: root
        mode: 0644
        path: /etc/test

A MCDRebootError alarm is triggered. But after 15 minutes this alarm disappears.

The alarm should not disappear after 15 minutes. It should remain there until the node is rebooted.

This is the PR that seems to introduce this behavior
https://github.com/openshift/machine-config-operator/pull/3406#discussion_r1030481908