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[enterprise-4.19] [CNV-56434] Watchdog add support for IBM Z #94671

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Jun 12, 2025
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[enterprise-4.19] [CNV-56434] Watchdog add support for IBM Z #94671

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15 changes: 8 additions & 7 deletions modules/virt-defining-watchdog-device-vm.adoc
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Original file line number Diff line number Diff line change
Expand Up @@ -10,7 +10,7 @@ You configure a watchdog device for the virtual machine (VM).

.Prerequisites

* The VM must have kernel support for an `i6300esb` watchdog device. {op-system-base-full} images support `i6300esb`.
* For `x86` systems, the VM must use a kernel that works with the `i6300esb` watchdog device. If you use `s390x` architecture, the kernel must be enabled for `diag288`. {op-system-base-full} images support `i6300esb` and `diag288`.
* You have installed the {oc-first}.

.Procedure
Expand All @@ -23,26 +23,27 @@ apiVersion: kubevirt.io/v1
kind: VirtualMachine
metadata:
labels:
kubevirt.io/vm: vm2-rhel84-watchdog
kubevirt.io/vm: <vm-label>
name: <vm-name>
spec:
runStrategy: Halted
template:
metadata:
labels:
kubevirt.io/vm: vm2-rhel84-watchdog
kubevirt.io/vm: <vm-label>
spec:
domain:
devices:
watchdog:
name: <watchdog>
i6300esb:
action: "poweroff" <1>
<watchdog-device-model>: <1>
action: "poweroff" <2>
# ...
----
<1> Specify `poweroff`, `reset`, or `shutdown`.
<1> The watchdog device model to use. For `x86` specify `i6300esb`. For `s390x` specify `diag288`.
<2> Specify `poweroff`, `reset`, or `shutdown`. The `shutdown` action requires that the guest virtual machine is responsive to ACPI signals. Therefore, using `shutdown` is not recommended.
+
The example above configures the `i6300esb` watchdog device on a RHEL8 VM with the poweroff action and exposes the device as `/dev/watchdog`.
The example above configures the watchdog device on a VM with the `poweroff` action and exposes the device as `/dev/watchdog`.
+
This device can now be used by the watchdog binary.

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14 changes: 14 additions & 0 deletions modules/virt-installing-watchdog-agent.adoc
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Expand Up @@ -12,6 +12,20 @@ You install the watchdog agent on the guest and start the `watchdog` service.

. Log in to the virtual machine as root user.

. This step is only required when installing on {ibm-z-name} (`s390x`). Enable `watchdog` by running the following command:
+
[source,terminal]
----
# modprobe diag288_wdt
----

. Verify that the `/dev/watchdog` file path is present in the VM by running the following command:
+
[source,terminal]
----
# ls /dev/watchdog
----

. Install the `watchdog` package and its dependencies:
+
[source,terminal]
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