106 lines
2.5 KiB
Go
106 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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"encoding/json"
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"fmt"
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"os"
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"strings"
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flaghelper "github.com/hashicorp/nomad/helper/flags"
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"github.com/hashicorp/nomad/helper/raftutil"
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"github.com/hashicorp/nomad/nomad"
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"github.com/posener/complete"
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)
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type OperatorSnapshotStateCommand struct {
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Meta
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}
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func (c *OperatorSnapshotStateCommand) Help() string {
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helpText := `
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Usage: nomad operator snapshot state [options] <file>
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Displays a JSON representation of state in the snapshot.
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To inspect the file "backup.snap":
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$ nomad operator snapshot state backup.snap
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Snapshot State Options:
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-filter
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Specifies an expression used to filter query results.
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`
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return strings.TrimSpace(helpText)
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}
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func (c *OperatorSnapshotStateCommand) AutocompleteFlags() complete.Flags {
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return complete.Flags{}
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}
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func (c *OperatorSnapshotStateCommand) AutocompleteArgs() complete.Predictor {
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return complete.PredictFiles("*.snap")
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}
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func (c *OperatorSnapshotStateCommand) Synopsis() string {
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return "Displays information about a Nomad snapshot file"
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}
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func (c *OperatorSnapshotStateCommand) Name() string { return "operator snapshot state" }
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func (c *OperatorSnapshotStateCommand) Run(args []string) int {
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var filterExpr flaghelper.StringFlag
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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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flags.Var(&filterExpr, "filter", "")
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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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filter, err := nomad.NewFSMFilter(filterExpr.String())
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if err != nil {
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c.Ui.Error(fmt.Sprintf("Invalid filter expression %q: %s", filterExpr, err))
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return 1
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}
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// Check that we either got no filename or exactly one.
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if len(flags.Args()) != 1 {
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c.Ui.Error("This command takes one argument: <file>")
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c.Ui.Error(commandErrorText(c))
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return 1
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}
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path := flags.Args()[0]
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f, err := os.Open(path)
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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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state, meta, err := raftutil.RestoreFromArchive(f, filter)
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if err != nil {
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c.Ui.Error(fmt.Sprintf("Failed to read archive file: %s", err))
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return 1
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}
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sm := raftutil.StateAsMap(state)
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sm["SnapshotMeta"] = []interface{}{meta}
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enc := json.NewEncoder(os.Stdout)
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enc.SetIndent("", " ")
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if err := enc.Encode(sm); err != nil {
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c.Ui.Error(fmt.Sprintf("Failed to encode output: %v", err))
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return 1
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}
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return 0
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}
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