open-consul/command/kv_export.go

110 lines
2.4 KiB
Go

package command
import (
"encoding/base64"
"encoding/json"
"fmt"
"strings"
"github.com/hashicorp/consul/api"
"github.com/hashicorp/consul/command/base"
)
// KVExportCommand is a Command implementation that is used to export
// a KV tree as JSON
type KVExportCommand struct {
base.Command
}
func (c *KVExportCommand) Synopsis() string {
return "Exports a tree from the KV store as JSON"
}
func (c *KVExportCommand) Help() string {
helpText := `
Usage: consul kv export [KEY_OR_PREFIX]
Retrieves key-value pairs for the given prefix from Consul's key-value store,
and writes a JSON representation to stdout. This can be used with the command
"consul kv import" to move entire trees between Consul clusters.
$ consul kv export vault
For a full list of options and examples, please see the Consul documentation.
` + c.Command.Help()
return strings.TrimSpace(helpText)
}
func (c *KVExportCommand) Run(args []string) int {
f := c.Command.NewFlagSet(c)
if err := c.Command.Parse(args); err != nil {
return 1
}
key := ""
// Check for arg validation
args = f.Args()
switch len(args) {
case 0:
key = ""
case 1:
key = args[0]
default:
c.Ui.Error(fmt.Sprintf("Too many arguments (expected 1, got %d)", len(args)))
return 1
}
// This is just a "nice" thing to do. Since pairs cannot start with a /, but
// users will likely put "/" or "/foo", lets go ahead and strip that for them
// here.
if len(key) > 0 && key[0] == '/' {
key = key[1:]
}
// Create and test the HTTP client
client, err := c.Command.HTTPClient()
if err != nil {
c.Ui.Error(fmt.Sprintf("Error connecting to Consul agent: %s", err))
return 1
}
pairs, _, err := client.KV().List(key, &api.QueryOptions{
AllowStale: c.Command.HTTPStale(),
})
if err != nil {
c.Ui.Error(fmt.Sprintf("Error querying Consul agent: %s", err))
return 1
}
exported := make([]*kvExportEntry, len(pairs))
for i, pair := range pairs {
exported[i] = toExportEntry(pair)
}
marshaled, err := json.MarshalIndent(exported, "", "\t")
if err != nil {
c.Ui.Error(fmt.Sprintf("Error exporting KV data: %s", err))
return 1
}
c.Ui.Info(string(marshaled))
return 0
}
type kvExportEntry struct {
Key string `json:"key"`
Flags uint64 `json:"flags"`
Value string `json:"value"`
}
func toExportEntry(pair *api.KVPair) *kvExportEntry {
return &kvExportEntry{
Key: pair.Key,
Flags: pair.Flags,
Value: base64.StdEncoding.EncodeToString(pair.Value),
}
}