47 lines
1021 B
Go
47 lines
1021 B
Go
package raftutil
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import (
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"fmt"
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"io"
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"io/ioutil"
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"os"
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"github.com/hashicorp/go-hclog"
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"github.com/hashicorp/nomad/helper/snapshot"
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"github.com/hashicorp/nomad/nomad/state"
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"github.com/hashicorp/raft"
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)
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func RestoreFromArchive(archive io.Reader) (*state.StateStore, *raft.SnapshotMeta, error) {
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logger := hclog.L()
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fsm, err := dummyFSM(logger)
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if err != nil {
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return nil, nil, fmt.Errorf("failed to create FSM: %w", err)
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}
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snap, err := ioutil.TempFile("", "snap-")
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if err != nil {
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return nil, nil, fmt.Errorf("failed to create a temp file: %w", err)
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}
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defer os.Remove(snap.Name())
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defer snap.Close()
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meta, err := snapshot.CopySnapshot(archive, snap)
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if err != nil {
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return nil, nil, fmt.Errorf("failed to read snapshot: %w", err)
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}
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_, err = snap.Seek(0, 0)
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if err != nil {
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return nil, nil, fmt.Errorf("failed to seek: %w", err)
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}
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err = fsm.Restore(snap)
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if err != nil {
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return nil, nil, fmt.Errorf("failed to restore from snapshot: %w", err)
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}
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return fsm.State(), meta, nil
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}
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