feat(scheduling): add zfs pool capacity tracking (#335)

Signed-off-by: shubham <shubham.bajpai@mayadata.io>

pkg/generated/informer/externalversions/zfs/v1/interface.go

@@ -26,6 +26,8 @@ import (
 type Interface interface {
 	// ZFSBackups returns a ZFSBackupInformer.
 	ZFSBackups() ZFSBackupInformer
+	// ZFSNodes returns a ZFSNodeInformer.
+	ZFSNodes() ZFSNodeInformer
 	// ZFSRestores returns a ZFSRestoreInformer.
 	ZFSRestores() ZFSRestoreInformer
 	// ZFSSnapshots returns a ZFSSnapshotInformer.
@@ -50,6 +52,11 @@ func (v *version) ZFSBackups() ZFSBackupInformer {
 	return &zFSBackupInformer{factory: v.factory, namespace: v.namespace, tweakListOptions: v.tweakListOptions}
 }
 
+// ZFSNodes returns a ZFSNodeInformer.
+func (v *version) ZFSNodes() ZFSNodeInformer {
+	return &zFSNodeInformer{factory: v.factory, namespace: v.namespace, tweakListOptions: v.tweakListOptions}
+}
+
 // ZFSRestores returns a ZFSRestoreInformer.
 func (v *version) ZFSRestores() ZFSRestoreInformer {
 	return &zFSRestoreInformer{factory: v.factory, namespace: v.namespace, tweakListOptions: v.tweakListOptions}

pkg/generated/informer/externalversions/zfs/v1/zfsnode.go

@@ -0,0 +1,90 @@
+/*
+Copyright 2019 The OpenEBS 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.
+*/
+
+// Code generated by informer-gen. DO NOT EDIT.
+
+package v1
+
+import (
+	"context"
+	time "time"
+
+	zfsv1 "github.com/openebs/zfs-localpv/pkg/apis/openebs.io/zfs/v1"
+	internalclientset "github.com/openebs/zfs-localpv/pkg/generated/clientset/internalclientset"
+	internalinterfaces "github.com/openebs/zfs-localpv/pkg/generated/informer/externalversions/internalinterfaces"
+	v1 "github.com/openebs/zfs-localpv/pkg/generated/lister/zfs/v1"
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	runtime "k8s.io/apimachinery/pkg/runtime"
+	watch "k8s.io/apimachinery/pkg/watch"
+	cache "k8s.io/client-go/tools/cache"
+)
+
+// ZFSNodeInformer provides access to a shared informer and lister for
+// ZFSNodes.
+type ZFSNodeInformer interface {
+	Informer() cache.SharedIndexInformer
+	Lister() v1.ZFSNodeLister
+}
+
+type zFSNodeInformer struct {
+	factory          internalinterfaces.SharedInformerFactory
+	tweakListOptions internalinterfaces.TweakListOptionsFunc
+	namespace        string
+}
+
+// NewZFSNodeInformer constructs a new informer for ZFSNode type.
+// Always prefer using an informer factory to get a shared informer instead of getting an independent
+// one. This reduces memory footprint and number of connections to the server.
+func NewZFSNodeInformer(client internalclientset.Interface, namespace string, resyncPeriod time.Duration, indexers cache.Indexers) cache.SharedIndexInformer {
+	return NewFilteredZFSNodeInformer(client, namespace, resyncPeriod, indexers, nil)
+}
+
+// NewFilteredZFSNodeInformer constructs a new informer for ZFSNode type.
+// Always prefer using an informer factory to get a shared informer instead of getting an independent
+// one. This reduces memory footprint and number of connections to the server.
+func NewFilteredZFSNodeInformer(client internalclientset.Interface, namespace string, resyncPeriod time.Duration, indexers cache.Indexers, tweakListOptions internalinterfaces.TweakListOptionsFunc) cache.SharedIndexInformer {
+	return cache.NewSharedIndexInformer(
+		&cache.ListWatch{
+			ListFunc: func(options metav1.ListOptions) (runtime.Object, error) {
+				if tweakListOptions != nil {
+					tweakListOptions(&options)
+				}
+				return client.ZfsV1().ZFSNodes(namespace).List(context.TODO(), options)
+			},
+			WatchFunc: func(options metav1.ListOptions) (watch.Interface, error) {
+				if tweakListOptions != nil {
+					tweakListOptions(&options)
+				}
+				return client.ZfsV1().ZFSNodes(namespace).Watch(context.TODO(), options)
+			},
+		},
+		&zfsv1.ZFSNode{},
+		resyncPeriod,
+		indexers,
+	)
+}
+
+func (f *zFSNodeInformer) defaultInformer(client internalclientset.Interface, resyncPeriod time.Duration) cache.SharedIndexInformer {
+	return NewFilteredZFSNodeInformer(client, f.namespace, resyncPeriod, cache.Indexers{cache.NamespaceIndex: cache.MetaNamespaceIndexFunc}, f.tweakListOptions)
+}
+
+func (f *zFSNodeInformer) Informer() cache.SharedIndexInformer {
+	return f.factory.InformerFor(&zfsv1.ZFSNode{}, f.defaultInformer)
+}
+
+func (f *zFSNodeInformer) Lister() v1.ZFSNodeLister {
+	return v1.NewZFSNodeLister(f.Informer().GetIndexer())
+}