69 lines
2.1 KiB
Go
69 lines
2.1 KiB
Go
/*
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Copyright 2016 The Kubernetes Authors All rights reserved.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package storagebackend
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import (
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"fmt"
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"k8s.io/kubernetes/pkg/runtime"
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"k8s.io/kubernetes/pkg/storage"
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)
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const (
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StorageTypeUnset = ""
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StorageTypeETCD2 = "etcd2"
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StorageTypeETCD3 = "etcd3"
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)
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// Config is configuration for creating a storage backend.
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type Config struct {
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// Type defines the type of storage backend, e.g. "etcd2", etcd3". Default ("") is "etcd2".
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Type string
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// Codec is used to serialize/deserialize objects.
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Codec runtime.Codec
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// Prefix is the prefix to all keys passed to storage.Interface methods.
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Prefix string
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// ServerList is the list of storage servers to connect with.
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ServerList []string
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// TLS credentials
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KeyFile string
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CertFile string
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CAFile string
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// Quorum indicates that whether read operations should be quorum-level consistent.
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Quorum bool
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// DeserializationCacheSize is the size of cache of deserialized objects.
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// Currently this is only supported in etcd2.
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// We will drop the cache once using protobuf.
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DeserializationCacheSize int
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}
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// Create creates a storage backend based on given config.
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func Create(c Config) (storage.Interface, error) {
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switch c.Type {
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case StorageTypeUnset, StorageTypeETCD2:
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return newETCD2Storage(c)
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case StorageTypeETCD3:
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// TODO: We have the following features to implement:
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// - Support secure connection by using key, cert, and CA files.
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// - Honor "https" scheme to support secure connection in gRPC.
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// - Support non-quorum read.
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return newETCD3Storage(c)
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default:
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return nil, fmt.Errorf("unknown storage type: %s", c.Type)
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}
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}
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