mirror of https://github.com/hashicorp/consul
105 lines
2.6 KiB
Go
105 lines
2.6 KiB
Go
package command
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import (
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"flag"
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"fmt"
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"os"
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"strings"
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"github.com/hashicorp/consul/api"
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"github.com/mitchellh/cli"
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)
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// SnapshotRestoreCommand is a Command implementation that is used to restore
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// the state of the Consul servers for disaster recovery.
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type SnapshotRestoreCommand struct {
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Ui cli.Ui
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}
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func (c *SnapshotRestoreCommand) Help() string {
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helpText := `
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Usage: consul snapshot restore [options] FILE
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Restores an atomic, point-in-time snapshot of the state of the Consul servers
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which includes key/value entries, service catalog, prepared queries, sessions,
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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 Consul 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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$ consul snapshot restore backup.snap
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For a full list of options and examples, please see the Consul documentation.
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` + apiOptsText
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return strings.TrimSpace(helpText)
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}
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func (c *SnapshotRestoreCommand) Run(args []string) int {
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cmdFlags := flag.NewFlagSet("get", flag.ContinueOnError)
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cmdFlags.Usage = func() { c.Ui.Output(c.Help()) }
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datacenter := cmdFlags.String("datacenter", "", "")
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token := cmdFlags.String("token", "", "")
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httpAddr := HTTPAddrFlag(cmdFlags)
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if err := cmdFlags.Parse(args); err != nil {
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return 1
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}
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var file string
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args = cmdFlags.Args()
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switch len(args) {
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case 0:
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c.Ui.Error("Missing FILE argument")
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return 1
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case 1:
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file = args[0]
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default:
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c.Ui.Error(fmt.Sprintf("Too many arguments (expected 1, got %d)", len(args)))
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return 1
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}
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// Create and test the HTTP client
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conf := api.DefaultConfig()
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conf.Datacenter = *datacenter
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conf.Address = *httpAddr
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conf.Token = *token
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client, err := api.NewClient(conf)
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if err != nil {
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c.Ui.Error(fmt.Sprintf("Error connecting to Consul agent: %s", err))
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return 1
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}
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// Open the file.
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f, err := os.Open(file)
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if err != nil {
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c.Ui.Error(fmt.Sprintf("Error opening snapshot file: %s", err))
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return 1
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}
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defer f.Close()
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// Restore the snapshot.
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err = client.Snapshot().Restore(&api.WriteOptions{
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Datacenter: *datacenter,
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}, f)
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if err != nil {
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c.Ui.Error(fmt.Sprintf("Error restoring snapshot: %s", err))
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return 1
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}
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c.Ui.Info("Restored snapshot")
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return 0
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}
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func (c *SnapshotRestoreCommand) Synopsis() string {
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return "Restores snapshot of Consul server state"
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}
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