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https://github.com/kemko/nomad.git
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fd05e461dd
Adds a `-type` flag to the `volume init` command that generates an example volume specification with only those fields relevant to dynamic host volumes. This changeset also moves the string literals into uses of `go:embed` Ref: https://github.com/hashicorp/nomad/pull/24479
127 lines
3.1 KiB
Go
127 lines
3.1 KiB
Go
// Copyright (c) HashiCorp, Inc.
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// SPDX-License-Identifier: BUSL-1.1
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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/command/asset"
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"github.com/posener/complete"
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)
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const (
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// defaultHclVolumeInitName is the default name we use when initializing
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// the example volume file in HCL format
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defaultHclVolumeInitName = "volume.hcl"
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// DefaultHclVolumeInitName is the default name we use when initializing
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// the example volume file in JSON format
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defaultJsonVolumeInitName = "volume.json"
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)
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// VolumeInitCommand generates a new volume spec that you can customize to
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// your liking, like vagrant init
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type VolumeInitCommand struct {
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Meta
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}
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func (c *VolumeInitCommand) Help() string {
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helpText := `
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Usage: nomad volume init <filename>
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Creates an example volume specification file that can be used as a starting
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point to customize further. If no filename is give, the default "volume.json"
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or "volume.hcl" will be used.
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Init Options:
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-json
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Create an example JSON volume specification.
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-type
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Create an example for a specific type of volume (one of "csi" or "host",
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defaults to "csi").
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`
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return strings.TrimSpace(helpText)
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}
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func (c *VolumeInitCommand) Synopsis() string {
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return "Create an example volume specification file"
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}
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func (c *VolumeInitCommand) AutocompleteFlags() complete.Flags {
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return complete.Flags{
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"-json": complete.PredictNothing,
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"-type": complete.PredictSet("host", "csi"),
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}
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}
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func (c *VolumeInitCommand) AutocompleteArgs() complete.Predictor {
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return complete.PredictNothing
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}
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func (c *VolumeInitCommand) Name() string { return "volume init" }
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func (c *VolumeInitCommand) Run(args []string) int {
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var jsonOutput bool
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var volType string
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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.BoolVar(&jsonOutput, "json", false, "")
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flags.StringVar(&volType, "type", "csi", "type of volume")
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if err := flags.Parse(args); err != nil {
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return 1
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}
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// Check that we get no arguments
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args = flags.Args()
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if l := len(args); l > 1 {
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c.Ui.Error("This command takes no arguments or one: <filename>")
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c.Ui.Error(commandErrorText(c))
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return 1
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}
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fileName := defaultHclVolumeInitName
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fileContent := asset.CSIVolumeSpecHCL
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if volType == "host" && !jsonOutput {
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fileContent = asset.HostVolumeSpecHCL
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} else if volType == "host" && jsonOutput {
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fileName = defaultJsonVolumeInitName
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fileContent = asset.HostVolumeSpecJSON
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} else if jsonOutput {
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fileName = defaultJsonVolumeInitName
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fileContent = asset.CSIVolumeSpecJSON
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}
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if len(args) == 1 {
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fileName = args[0]
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}
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// Check if the file already exists
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_, err := os.Stat(fileName)
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if err != nil && !os.IsNotExist(err) {
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c.Ui.Error(fmt.Sprintf("Failed to stat %q: %v", fileName, err))
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return 1
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}
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if !os.IsNotExist(err) {
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c.Ui.Error(fmt.Sprintf("Volume specification %q already exists", fileName))
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return 1
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}
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// Write out the example
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err = os.WriteFile(fileName, fileContent, 0660)
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if err != nil {
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c.Ui.Error(fmt.Sprintf("Failed to write %q: %v", fileName, err))
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return 1
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}
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// Success
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c.Ui.Output(fmt.Sprintf("Example volume specification written to %s", fileName))
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return 0
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}
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