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Use an interface to construct Populator Pod Spec #171

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Use an interface to construct Populator Pod Spec #171

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72 changes: 41 additions & 31 deletions populator-machinery/controller.go
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Original file line number Diff line number Diff line change
Expand Up @@ -112,7 +112,7 @@ type controller struct {
recorder record.EventRecorder
referenceGrantLister referenceGrantv1beta1.ReferenceGrantLister
referenceGrantSynced cache.InformerSynced
podConfig *PodConfig
podConfig PodSpecFactory
providerFunctionConfig *ProviderFunctionConfig
crossNamespace bool
}
Expand All @@ -133,7 +133,7 @@ type VolumePopulatorConfig struct {
Gvr schema.GroupVersionResource
// PodConfig is the configuration for creating populator pod. Either PodConfig or ProviderFunctionConfig should
// be specified. PodConfig and ProviderFunctionConfig can't be provided at the same time
PodConfig *PodConfig
PodConfig PodSpecFactory
// ProviderFunctionConfig is the configuration for invoking provider functions. Either PodConfig or ProviderFunctionConfig should
// be specified. PodConfig and ProviderFunctionConfig can't be provided at the same time
ProviderFunctionConfig *ProviderFunctionConfig
Expand All @@ -148,6 +148,10 @@ type VolumePopulatorConfig struct {
StopCh chan struct{}
}

type PodSpecFactory interface {
MakePopulatePodSpec(pvcPrimeName string, rawBlock bool, unstructured *unstructured.Unstructured) (*corev1.PodSpec, error)
}

type PodConfig struct {
// ImageName is the container image name
ImageName string
Expand Down Expand Up @@ -759,9 +763,7 @@ func (c *controller) syncPvc(ctx context.Context, key, pvcNamespace, pvcName str
rawBlock = true
}

// Calculate the args for the populator pod
var args []string
args, err = c.podConfig.PopulatorArgs(rawBlock, unstructured)
podSpec, err := c.podConfig.MakePopulatePodSpec(pvcPrimeName, rawBlock, unstructured)
if err != nil {
return err
}
Expand All @@ -772,26 +774,7 @@ func (c *controller) syncPvc(ctx context.Context, key, pvcNamespace, pvcName str
Name: podName,
Namespace: c.populatorNamespace,
},
Spec: makePopulatePodSpec(pvcPrimeName),
}
pod.Spec.Volumes[0].VolumeSource.PersistentVolumeClaim.ClaimName = pvcPrimeName
con := &pod.Spec.Containers[0]
con.Image = c.podConfig.ImageName
con.Args = args
if rawBlock {
con.VolumeDevices = []corev1.VolumeDevice{
{
Name: populatorPodVolumeName,
DevicePath: c.podConfig.DevicePath,
},
}
} else {
con.VolumeMounts = []corev1.VolumeMount{
{
Name: populatorPodVolumeName,
MountPath: c.podConfig.MountPath,
},
}
Spec: *podSpec,
}
if waitForFirstConsumer {
pod.Spec.NodeName = nodeName
Expand Down Expand Up @@ -925,13 +908,40 @@ func (c *controller) syncPvc(ctx context.Context, key, pvcNamespace, pvcName str
return nil
}

func makePopulatePodSpec(pvcPrimeName string) corev1.PodSpec {
return corev1.PodSpec{
Containers: []corev1.Container{
func (pc *PodConfig) MakePopulatePodSpec(pvcPrimeName string, rawBlock bool, unstructured *unstructured.Unstructured) (*corev1.PodSpec, error) {
// Calculate the args for the populator pod
var args []string
args, err := pc.PopulatorArgs(rawBlock, unstructured)
if err != nil {
return nil, err
}

con := corev1.Container{
Name: populatorContainerName,
ImagePullPolicy: corev1.PullIfNotPresent,
Image: pc.ImageName,
Args: args,
}

if rawBlock {
con.VolumeDevices = []corev1.VolumeDevice{
{
Name: populatorPodVolumeName,
DevicePath: pc.DevicePath,
},
}
} else {
con.VolumeMounts = []corev1.VolumeMount{
{
Name: populatorContainerName,
ImagePullPolicy: corev1.PullIfNotPresent,
Name: populatorPodVolumeName,
MountPath: pc.MountPath,
},
}
}

return &corev1.PodSpec{
Containers: []corev1.Container{
con,
},
RestartPolicy: corev1.RestartPolicyNever,
Volumes: []corev1.Volume{
Expand All @@ -944,7 +954,7 @@ func makePopulatePodSpec(pvcPrimeName string) corev1.PodSpec {
},
},
},
}
}, nil
}

func (c *controller) ensureFinalizer(ctx context.Context, pvc *corev1.PersistentVolumeClaim, finalizer string, want bool) error {
Expand Down