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a49711b8bf
This patch refactors the commands that use the mitchellh/cli library to populate the command line flag set in both the Run() and the Help() method. Earlier versions of the mitchellh/cli library relied on the Run() method to populuate the flagset for generating the usage screen. This has changed in later versions and was previously solved with a small monkey patch to the library to restore the old behavior. However, this makes upgrading the library difficult since the patch has to be restored every time. This patch addresses this by moving the command line flags into an initFlags() method where appropriate and also moving all variables for the flags from the Run() method into the command itself. Fixes #3536
89 lines
2.1 KiB
Go
89 lines
2.1 KiB
Go
package command
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import (
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"fmt"
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"os"
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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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BaseCommand
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}
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func (c *SnapshotRestoreCommand) Help() string {
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c.InitFlagSet()
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return c.HelpCommand(`
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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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`)
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}
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func (c *SnapshotRestoreCommand) Run(args []string) int {
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c.InitFlagSet()
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if err := c.FlagSet.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 = c.FlagSet.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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client, err := c.HTTPClient()
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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(nil, 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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