add vmi-fedora-isolated.yaml

An example of YAML configuration with CPU isolation. Signed-off-by: Marcelo Tosatti <[email protected]>
attlee-wang · Nov 9, 2022 · 9bcb03c · 9bcb03c
1 parent 572076e
commit 9bcb03c
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diff --git a/examples/vmi-fedora-isolated.yaml b/examples/vmi-fedora-isolated.yaml
@@ -0,0 +1,36 @@
+---
+apiVersion: kubevirt.io/v1
+kind: VirtualMachineInstance
+metadata:
+  labels:
+    special: vmi-fedora
+  name: vmi-fedora
+spec:
+  domain:
+    cpu:
+      cores: 1
+      dedicatedCpuPlacement: true
+      isolateEmulatorThread: true
+    devices:
+      disks:
+      - disk:
+          bus: virtio
+        name: containerdisk
+      - disk:
+          bus: virtio
+        name: cloudinitdisk
+      rng: {}
+    resources:
+      requests:
+        memory: 1024M
+  terminationGracePeriodSeconds: 0
+  volumes:
+  - containerDisk:
+      image: registry:5000/kubevirt/fedora-with-test-tooling-container-disk:devel
+    name: containerdisk
+  - cloudInitNoCloud:
+      userData: |-
+        #cloud-config
+        password: fedora
+        chpasswd: { expire: False }
+    name: cloudinitdisk
diff --git a/tools/vms-generator/utils/utils.go b/tools/vms-generator/utils/utils.go
@@ -56,6 +56,7 @@ const (
 	VmiInstancetypeSmall = "vmi-instancetype-small"
 	VmiSata              = "vmi-sata"
 	VmiFedora            = "vmi-fedora"
+	VmiFedoraIsolated    = "vmi-fedora-isolated"
 	VmiSecureBoot        = "vmi-secureboot"
 	VmiAlpineEFI         = "vmi-alpine-efi"
 	VmiNoCloud           = "vmi-nocloud"
@@ -186,6 +187,13 @@ func initFedora(spec *v1.VirtualMachineInstanceSpec) *v1.VirtualMachineInstanceS
 	addRNG(spec) // without RNG, newer fedora images may hang waiting for entropy sources
 	return spec
 }
+func initFedoraIsolated(spec *v1.VirtualMachineInstanceSpec) *v1.VirtualMachineInstanceSpec {
+	addContainerDisk(spec, fmt.Sprintf(strFmt, DockerPrefix, imageFedora, DockerTag), v1.DiskBusVirtio)
+	addRNG(spec) // without RNG, newer fedora images may hang waiting for entropy sources
+
+	addDedicatedAndIsolatedCPU(spec)
+	return spec
+}
 func enableNetworkInterfaceMultiqueue(spec *v1.VirtualMachineInstanceSpec, enable bool) {
 	spec.Domain.Devices.NetworkInterfaceMultiQueue = &enable
 }
@@ -206,6 +214,16 @@ func setDefaultNetworkAndInterface(spec *v1.VirtualMachineInstanceSpec, bindingM
 	return spec
 }
 
+func addDedicatedAndIsolatedCPU(spec *v1.VirtualMachineInstanceSpec) *v1.VirtualMachineInstanceSpec {
+	cpu := &v1.CPU{
+		IsolateEmulatorThread: true,
+		DedicatedCPUPlacement: true,
+		Cores:                 1,
+	}
+	spec.Domain.CPU = cpu
+	return spec
+}
+
 func addRNG(spec *v1.VirtualMachineInstanceSpec) *v1.VirtualMachineInstanceSpec {
 	spec.Domain.Devices.Rng = &v1.Rng{}
 	return spec
@@ -453,6 +471,14 @@ func GetVMIEphemeralFedora() *v1.VirtualMachineInstance {
 	return vmi
 }
 
+func GetVMIEphemeralFedoraIsolated() *v1.VirtualMachineInstance {
+	vmi := getBaseVMI(VmiFedora)
+	vmi.Spec.Domain.Resources.Requests[k8sv1.ResourceMemory] = resource.MustParse("1024M")
+	initFedoraIsolated(&vmi.Spec)
+	addNoCloudDiskWitUserData(&vmi.Spec, generateCloudConfigString(cloudConfigUserPassword))
+	return vmi
+}
+
 func GetVMISecureBoot() *v1.VirtualMachineInstance {
 	vmi := getBaseVMI(VmiSecureBoot)
 

diff --git a/tools/vms-generator/vms-generator.go b/tools/vms-generator/vms-generator.go
@@ -106,6 +106,7 @@ func main() {
 		utils.VmiMigratable:        utils.GetVMIMigratable(),
 		utils.VmiSata:              utils.GetVMISata(),
 		utils.VmiFedora:            utils.GetVMIEphemeralFedora(),
+		utils.VmiFedoraIsolated:    utils.GetVMIEphemeralFedoraIsolated(),
 		utils.VmiSecureBoot:        utils.GetVMISecureBoot(),
 		utils.VmiAlpineEFI:         utils.GetVMIAlpineEFI(),
 		utils.VmiNoCloud:           utils.GetVMINoCloud(),