99 lines
2.5 KiB
Go
99 lines
2.5 KiB
Go
// Copyright (c) HashiCorp, Inc.
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// SPDX-License-Identifier: MPL-2.0
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package command
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import (
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"fmt"
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"os"
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"strings"
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"github.com/hashicorp/nomad/api"
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"github.com/posener/complete"
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)
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type OperatorSnapshotRestoreCommand struct {
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Meta
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}
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func (c *OperatorSnapshotRestoreCommand) Help() string {
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helpText := `
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Usage: nomad operator snapshot restore [options] <file>
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Restores an atomic, point-in-time snapshot of the state of the Nomad servers
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which includes jobs, nodes, allocations, periodic jobs, and ACLs.
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Restores involve a potentially dangerous low-level Raft operation that is not
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designed to handle server failures during a restore. This command is primarily
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intended to be used when recovering from a disaster, restoring into a fresh
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cluster of Nomad servers.
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If ACLs are enabled, a management token must be supplied in order to perform
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snapshot operations.
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To restore a snapshot from the file "backup.snap":
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$ nomad operator snapshot restore backup.snap
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General Options:
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` + generalOptionsUsage(usageOptsDefault|usageOptsNoNamespace)
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return strings.TrimSpace(helpText)
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}
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func (c *OperatorSnapshotRestoreCommand) AutocompleteFlags() complete.Flags {
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return c.Meta.AutocompleteFlags(FlagSetClient)
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}
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func (c *OperatorSnapshotRestoreCommand) AutocompleteArgs() complete.Predictor {
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return complete.PredictNothing
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}
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func (c *OperatorSnapshotRestoreCommand) Synopsis() string {
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return "Restore snapshot of Nomad server state"
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}
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func (c *OperatorSnapshotRestoreCommand) Name() string { return "operator snapshot restore" }
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func (c *OperatorSnapshotRestoreCommand) Run(args []string) int {
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flags := c.Meta.FlagSet(c.Name(), FlagSetClient)
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flags.Usage = func() { c.Ui.Output(c.Help()) }
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if err := flags.Parse(args); err != nil {
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c.Ui.Error(fmt.Sprintf("Failed to parse args: %v", err))
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return 1
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}
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// Check for misuse
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args = flags.Args()
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if len(args) != 1 {
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c.Ui.Error("This command takes one argument: <filename>")
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c.Ui.Error(commandErrorText(c))
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return 1
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}
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snap, err := os.Open(args[0])
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if err != nil {
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c.Ui.Error(fmt.Sprintf("Error opening snapshot file: %q", err))
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return 1
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}
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defer snap.Close()
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// Set up a client.
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client, err := c.Meta.Client()
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if err != nil {
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c.Ui.Error(fmt.Sprintf("Error initializing client: %s", err))
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return 1
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}
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// Call snapshot restore API with backup file.
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_, err = client.Operator().SnapshotRestore(snap, &api.WriteOptions{})
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if err != nil {
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c.Ui.Error(fmt.Sprintf("Failed to get restore snapshot: %v", err))
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return 1
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}
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c.Ui.Output("Snapshot Restored")
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return 0
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}
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