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95 lines
2.5 KiB
95 lines
2.5 KiB
/*
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* Minimalist Object Storage, (C) 2015 Minio, Inc.
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*
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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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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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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 donut
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import (
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"errors"
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"github.com/minio/minio/pkg/iodine"
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)
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// donut struct internal data
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type donut struct {
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name string
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buckets map[string]Bucket
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nodes map[string]Node
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}
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// config files used inside Donut
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const (
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// donut object metadata and config
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donutObjectMetadataConfig = "donutObjectMetadata.json"
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donutConfig = "donutMetadata.json"
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// bucket, object metadata
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bucketMetadataConfig = "bucketMetadata.json"
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objectMetadataConfig = "objectMetadata.json"
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// versions
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objectMetadataVersion = "1.0"
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donutObjectMetadataVersion = "1.0"
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)
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// attachDonutNode - wrapper function to instantiate a new node for associated donut
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// based on the provided configuration
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func (d donut) attachDonutNode(hostname string, disks []string) error {
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node, err := NewNode(hostname)
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if err != nil {
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return iodine.New(err, nil)
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}
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for i, disk := range disks {
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// Order is necessary for maps, keep order number separately
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newDisk, err := NewDisk(disk, i)
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if err != nil {
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return iodine.New(err, nil)
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}
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if err := newDisk.MakeDir(d.name); err != nil {
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return iodine.New(err, nil)
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}
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if err := node.AttachDisk(newDisk); err != nil {
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return iodine.New(err, nil)
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}
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}
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if err := d.AttachNode(node); err != nil {
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return iodine.New(err, nil)
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}
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return nil
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}
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// NewDonut - instantiate a new donut
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func NewDonut(donutName string, nodeDiskMap map[string][]string) (Donut, error) {
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if donutName == "" || len(nodeDiskMap) == 0 {
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return nil, iodine.New(errors.New("invalid argument"), nil)
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}
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nodes := make(map[string]Node)
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buckets := make(map[string]Bucket)
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d := donut{
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name: donutName,
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nodes: nodes,
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buckets: buckets,
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}
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for k, v := range nodeDiskMap {
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if len(v) == 0 {
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return nil, iodine.New(errors.New("invalid number of disks per node"), nil)
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}
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err := d.attachDonutNode(k, v)
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if err != nil {
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return nil, iodine.New(err, nil)
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}
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}
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return d, nil
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}
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