operator: dsa: Add InitImage for initcontainer

Signed-off-by: Oleg Zhurakivskyy <oleg.zhurakivskyy@intel.com>

Author: ozhuraki

deployments/operator/crd/bases/deviceplugin.intel.com_dsadeviceplugins.yaml

@@ -51,6 +51,10 @@ spec:
           spec:
             description: DsaDevicePluginSpec defines the desired state of DsaDevicePlugin.
             properties:
+              InitImage:
+                description: InitImage is an initcontainer image to configure and
+                  enable DSA devices and workqueues with accel-config utility
+                type: string
               image:
                 description: Image is a container image with DSA device plugin executable.
                 type: string

pkg/apis/deviceplugin/v1/dsadeviceplugin_types.go

@@ -1,4 +1,4 @@
-// Copyright 2020 Intel Corporation. All Rights Reserved.
+// Copyright 2020-2021 Intel Corporation. All Rights Reserved.
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
@@ -31,6 +31,9 @@ type DsaDevicePluginSpec struct {
 	// Image is a container image with DSA device plugin executable.
 	Image string `json:"image,omitempty"`
 
+	// InitImage is an initcontainer image to configure and enable DSA devices and workqueues with accel-config utility
+	InitImage string `json:"InitImage,omitempty"`
+
 	// SharedDevNum is a number of containers that can share the same DSA device.
 	// +kubebuilder:validation:Minimum=1
 	SharedDevNum int `json:"sharedDevNum,omitempty"`

pkg/apis/deviceplugin/v1/dsadeviceplugin_webhook.go

@@ -1,4 +1,4 @@
-// Copyright 2020 Intel Corporation. All Rights Reserved.
+// Copyright 2020-2021 Intel Corporation. All Rights Reserved.
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
@@ -86,5 +86,13 @@ func (r *DsaDevicePlugin) ValidateDelete() error {
 }
 
 func (r *DsaDevicePlugin) validatePlugin() error {
-	return validatePluginImage(r.Spec.Image, "intel-dsa-plugin", dsaMinVersion)
+	if err := validatePluginImage(r.Spec.Image, "intel-dsa-plugin", dsaMinVersion); err != nil {
+		return err
+	}
+
+	if len(r.Spec.InitImage) > 0 {
+		return validatePluginImage(r.Spec.InitImage, "intel-dsa-initcontainer", dsaMinVersion)
+	}
+
+	return nil
 }

pkg/controllers/dsa/controller.go

@@ -1,4 +1,4 @@
-// Copyright 2020 Intel Corporation. All Rights Reserved.
+// Copyright 2020-2021 Intel Corporation. All Rights Reserved.
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
@@ -75,6 +75,25 @@ func (c *controller) GetTotalObjectCount(ctx context.Context, clnt client.Client
 	return len(list.Items), nil
 }
 
+func setInitContainer(spec *v1.PodSpec, imageName string) {
+	yes := true
+	spec.InitContainers = []v1.Container{
+		{
+			Image:           imageName,
+			ImagePullPolicy: "IfNotPresent",
+			Name:            "intel-dsa-initcontainer",
+			SecurityContext: &v1.SecurityContext{
+				Privileged: &yes,
+			},
+			VolumeMounts: []v1.VolumeMount{
+				{
+					Name:      "sys-devices",
+					MountPath: "/sys/devices",
+				},
+			},
+		}}
+}
+
 func (c *controller) NewDaemonSet(rawObj client.Object) *apps.DaemonSet {
 	devicePlugin := rawObj.(*devicepluginv1.DsaDevicePlugin)
 
@@ -193,6 +212,21 @@ func (c *controller) NewDaemonSet(rawObj client.Object) *apps.DaemonSet {
 			},
 		},
 	}
+
+	// add the optional InitImage
+	if devicePlugin.Spec.InitImage != "" {
+		setInitContainer(&daemonSet.Spec.Template.Spec, devicePlugin.Spec.InitImage)
+
+		daemonSet.Spec.Template.Spec.Volumes = append(daemonSet.Spec.Template.Spec.Volumes, v1.Volume{
+			Name: "sys-devices",
+			VolumeSource: v1.VolumeSource{
+				HostPath: &v1.HostPathVolumeSource{
+					Path: "/sys/devices",
+				},
+			},
+		})
+	}
+
 	return &daemonSet
 }