seaweedfs/go/replication/allocate_volume.go

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package replication
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import (
"code.google.com/p/weed-fs/go/storage"
"code.google.com/p/weed-fs/go/topology"
"code.google.com/p/weed-fs/go/util"
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"encoding/json"
"errors"
"net/url"
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)
type AllocateVolumeResult struct {
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Error string
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}
func AllocateVolume(dn *topology.DataNode, vid storage.VolumeId, collection string, rp *storage.ReplicaPlacement) error {
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values := make(url.Values)
values.Add("volume", vid.String())
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values.Add("collection", collection)
values.Add("replication", rp.String())
jsonBlob, err := util.Post("http://"+dn.PublicUrl+"/admin/assign_volume", values)
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if err != nil {
return err
}
var ret AllocateVolumeResult
if err := json.Unmarshal(jsonBlob, &ret); err != nil {
return err
}
if ret.Error != "" {
return errors.New(ret.Error)
}
return nil
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}