feat: add crd gen

Signed-off-by: runzexia <runzexia@yunify.com>

vendor/k8s.io/apiserver/pkg/storage/storagebackend/OWNERS

@@ -0,0 +1,6 @@
+reviewers:
+- lavalamp
+- smarterclayton
+- wojtek-t
+- timothysc
+- hongchaodeng

vendor/k8s.io/apiserver/pkg/storage/storagebackend/config.go

@@ -0,0 +1,69 @@
+/*
+Copyright 2016 The Kubernetes 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 storagebackend
+
+import (
+	"time"
+
+	"k8s.io/apimachinery/pkg/runtime"
+	"k8s.io/apiserver/pkg/storage/value"
+)
+
+const (
+	StorageTypeUnset = ""
+	StorageTypeETCD3 = "etcd3"
+
+	DefaultCompactInterval = 5 * time.Minute
+)
+
+// Config is configuration for creating a storage backend.
+type Config struct {
+	// Type defines the type of storage backend. Default ("") is "etcd3".
+	Type string
+	// Prefix is the prefix to all keys passed to storage.Interface methods.
+	Prefix string
+	// ServerList is the list of storage servers to connect with.
+	ServerList []string
+	// TLS credentials
+	KeyFile  string
+	CertFile string
+	CAFile   string
+	// Paging indicates whether the server implementation should allow paging (if it is
+	// supported). This is generally configured by feature gating, or by a specific
+	// resource type not wishing to allow paging, and is not intended for end users to
+	// set.
+	Paging bool
+
+	Codec runtime.Codec
+	// Transformer allows the value to be transformed prior to persisting into etcd.
+	Transformer value.Transformer
+
+	// CompactionInterval is an interval of requesting compaction from apiserver.
+	// If the value is 0, no compaction will be issued.
+	CompactionInterval time.Duration
+
+	// CountMetricPollPeriod specifies how often should count metric be updated
+	CountMetricPollPeriod time.Duration
+}
+
+func NewDefaultConfig(prefix string, codec runtime.Codec) *Config {
+	return &Config{
+		Prefix:             prefix,
+		Codec:              codec,
+		CompactionInterval: DefaultCompactInterval,
+	}
+}

vendor/k8s.io/apiserver/pkg/storage/storagebackend/factory/etcd3.go

@@ -0,0 +1,127 @@
+/*
+Copyright 2016 The Kubernetes 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 factory
+
+import (
+	"context"
+	"fmt"
+	"sync/atomic"
+	"time"
+
+	"github.com/coreos/etcd/clientv3"
+	"github.com/coreos/etcd/pkg/transport"
+	grpcprom "github.com/grpc-ecosystem/go-grpc-prometheus"
+	"google.golang.org/grpc"
+
+	"k8s.io/apimachinery/pkg/util/wait"
+	"k8s.io/apiserver/pkg/storage"
+	"k8s.io/apiserver/pkg/storage/etcd3"
+	"k8s.io/apiserver/pkg/storage/storagebackend"
+	"k8s.io/apiserver/pkg/storage/value"
+)
+
+// The short keepalive timeout and interval have been chosen to aggressively
+// detect a failed etcd server without introducing much overhead.
+const keepaliveTime = 30 * time.Second
+const keepaliveTimeout = 10 * time.Second
+
+// dialTimeout is the timeout for failing to establish a connection.
+// It is set to 20 seconds as times shorter than that will cause TLS connections to fail
+// on heavily loaded arm64 CPUs (issue #64649)
+const dialTimeout = 20 * time.Second
+
+func newETCD3HealthCheck(c storagebackend.Config) (func() error, error) {
+	// constructing the etcd v3 client blocks and times out if etcd is not available.
+	// retry in a loop in the background until we successfully create the client, storing the client or error encountered
+
+	clientValue := &atomic.Value{}
+
+	clientErrMsg := &atomic.Value{}
+	clientErrMsg.Store("etcd client connection not yet established")
+
+	go wait.PollUntil(time.Second, func() (bool, error) {
+		client, err := newETCD3Client(c)
+		if err != nil {
+			clientErrMsg.Store(err.Error())
+			return false, nil
+		}
+		clientValue.Store(client)
+		clientErrMsg.Store("")
+		return true, nil
+	}, wait.NeverStop)
+
+	return func() error {
+		if errMsg := clientErrMsg.Load().(string); len(errMsg) > 0 {
+			return fmt.Errorf(errMsg)
+		}
+		client := clientValue.Load().(*clientv3.Client)
+		ctx, cancel := context.WithTimeout(context.Background(), 2*time.Second)
+		defer cancel()
+		if _, err := client.Cluster.MemberList(ctx); err != nil {
+			return fmt.Errorf("error listing etcd members: %v", err)
+		}
+		return nil
+	}, nil
+}
+
+func newETCD3Client(c storagebackend.Config) (*clientv3.Client, error) {
+	tlsInfo := transport.TLSInfo{
+		CertFile: c.CertFile,
+		KeyFile:  c.KeyFile,
+		CAFile:   c.CAFile,
+	}
+	tlsConfig, err := tlsInfo.ClientConfig()
+	if err != nil {
+		return nil, err
+	}
+	// NOTE: Client relies on nil tlsConfig
+	// for non-secure connections, update the implicit variable
+	if len(c.CertFile) == 0 && len(c.KeyFile) == 0 && len(c.CAFile) == 0 {
+		tlsConfig = nil
+	}
+	cfg := clientv3.Config{
+		DialTimeout:          dialTimeout,
+		DialKeepAliveTime:    keepaliveTime,
+		DialKeepAliveTimeout: keepaliveTimeout,
+		DialOptions: []grpc.DialOption{
+			grpc.WithUnaryInterceptor(grpcprom.UnaryClientInterceptor),
+			grpc.WithStreamInterceptor(grpcprom.StreamClientInterceptor),
+		},
+		Endpoints: c.ServerList,
+		TLS:       tlsConfig,
+	}
+
+	return clientv3.New(cfg)
+}
+
+func newETCD3Storage(c storagebackend.Config) (storage.Interface, DestroyFunc, error) {
+	client, err := newETCD3Client(c)
+	if err != nil {
+		return nil, nil, err
+	}
+	ctx, cancel := context.WithCancel(context.Background())
+	etcd3.StartCompactor(ctx, client, c.CompactionInterval)
+	destroyFunc := func() {
+		cancel()
+		client.Close()
+	}
+	transformer := c.Transformer
+	if transformer == nil {
+		transformer = value.IdentityTransformer
+	}
+	return etcd3.New(client, c.Codec, c.Prefix, transformer, c.Paging), destroyFunc, nil
+}

vendor/k8s.io/apiserver/pkg/storage/storagebackend/factory/factory.go

@@ -0,0 +1,51 @@
+/*
+Copyright 2016 The Kubernetes 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 factory
+
+import (
+	"fmt"
+
+	"k8s.io/apiserver/pkg/storage"
+	"k8s.io/apiserver/pkg/storage/storagebackend"
+)
+
+// DestroyFunc is to destroy any resources used by the storage returned in Create() together.
+type DestroyFunc func()
+
+// Create creates a storage backend based on given config.
+func Create(c storagebackend.Config) (storage.Interface, DestroyFunc, error) {
+	switch c.Type {
+	case "etcd2":
+		return nil, nil, fmt.Errorf("%v is no longer a supported storage backend", c.Type)
+	case storagebackend.StorageTypeUnset, storagebackend.StorageTypeETCD3:
+		return newETCD3Storage(c)
+	default:
+		return nil, nil, fmt.Errorf("unknown storage type: %s", c.Type)
+	}
+}
+
+// CreateHealthCheck creates a healthcheck function based on given config.
+func CreateHealthCheck(c storagebackend.Config) (func() error, error) {
+	switch c.Type {
+	case "etcd2":
+		return nil, fmt.Errorf("%v is no longer a supported storage backend", c.Type)
+	case storagebackend.StorageTypeUnset, storagebackend.StorageTypeETCD3:
+		return newETCD3HealthCheck(c)
+	default:
+		return nil, fmt.Errorf("unknown storage type: %s", c.Type)
+	}
+}