Move nri packages to plugin and internal

NRI is still newer and mostly used by CRI plugin. Keep the package in
internal to allow for interfaces as the project matures.

Signed-off-by: Derek McGowan <derek@mcg.dev>

internal/nri/sandbox.go

@@ -0,0 +1,67 @@
+/*
+   Copyright The containerd Authors.
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+*/
+
+package nri
+
+import (
+	nri "github.com/containerd/nri/pkg/adaptation"
+)
+
+// PodSandbox interface for interacting with NRI.
+type PodSandbox interface {
+	GetDomain() string
+
+	GetID() string
+	GetName() string
+	GetUID() string
+	GetNamespace() string
+	GetLabels() map[string]string
+	GetAnnotations() map[string]string
+	GetRuntimeHandler() string
+	GetLinuxPodSandbox() LinuxPodSandbox
+
+	GetPid() uint32
+}
+
+type LinuxPodSandbox interface {
+	GetLinuxNamespaces() []*nri.LinuxNamespace
+	GetPodLinuxOverhead() *nri.LinuxResources
+	GetPodLinuxResources() *nri.LinuxResources
+	GetCgroupParent() string
+	GetCgroupsPath() string
+	GetLinuxResources() *nri.LinuxResources
+}
+
+func commonPodSandboxToNRI(pod PodSandbox) *nri.PodSandbox {
+	return &nri.PodSandbox{
+		Id:             pod.GetID(),
+		Name:           pod.GetName(),
+		Uid:            pod.GetUID(),
+		Namespace:      pod.GetNamespace(),
+		Labels:         pod.GetLabels(),
+		Annotations:    pod.GetAnnotations(),
+		RuntimeHandler: pod.GetRuntimeHandler(),
+		Pid:            pod.GetPid(),
+	}
+}
+
+func podSandboxesToNRI(podList []PodSandbox) []*nri.PodSandbox {
+	pods := []*nri.PodSandbox{}
+	for _, pod := range podList {
+		pods = append(pods, podSandboxToNRI(pod))
+	}
+	return pods
+}