mirror of https://github.com/hashicorp/consul
138 lines
3.1 KiB
Go
138 lines
3.1 KiB
Go
package save
|
|
|
|
import (
|
|
"flag"
|
|
"fmt"
|
|
"io"
|
|
"os"
|
|
|
|
"github.com/hashicorp/consul/api"
|
|
"github.com/hashicorp/consul/command/flags"
|
|
"github.com/hashicorp/consul/snapshot"
|
|
"github.com/mitchellh/cli"
|
|
)
|
|
|
|
func New(ui cli.Ui) *cmd {
|
|
c := &cmd{UI: ui}
|
|
c.init()
|
|
return c
|
|
}
|
|
|
|
type cmd struct {
|
|
UI cli.Ui
|
|
flags *flag.FlagSet
|
|
http *flags.HTTPFlags
|
|
help string
|
|
}
|
|
|
|
func (c *cmd) init() {
|
|
c.flags = flag.NewFlagSet("", flag.ContinueOnError)
|
|
c.http = &flags.HTTPFlags{}
|
|
flags.Merge(c.flags, c.http.ClientFlags())
|
|
flags.Merge(c.flags, c.http.ServerFlags())
|
|
c.help = flags.Usage(help, c.flags)
|
|
}
|
|
|
|
func (c *cmd) Run(args []string) int {
|
|
if err := c.flags.Parse(args); err != nil {
|
|
return 1
|
|
}
|
|
|
|
var file string
|
|
|
|
args = c.flags.Args()
|
|
switch len(args) {
|
|
case 0:
|
|
c.UI.Error("Missing FILE argument")
|
|
return 1
|
|
case 1:
|
|
file = args[0]
|
|
default:
|
|
c.UI.Error(fmt.Sprintf("Too many arguments (expected 1, got %d)", len(args)))
|
|
return 1
|
|
}
|
|
|
|
// Create and test the HTTP client
|
|
client, err := c.http.APIClient()
|
|
if err != nil {
|
|
c.UI.Error(fmt.Sprintf("Error connecting to Consul agent: %s", err))
|
|
return 1
|
|
}
|
|
|
|
// Take the snapshot.
|
|
snap, qm, err := client.Snapshot().Save(&api.QueryOptions{
|
|
AllowStale: c.http.Stale(),
|
|
})
|
|
if err != nil {
|
|
c.UI.Error(fmt.Sprintf("Error saving snapshot: %s", err))
|
|
return 1
|
|
}
|
|
defer snap.Close()
|
|
|
|
// Save the file.
|
|
f, err := os.Create(file)
|
|
if err != nil {
|
|
c.UI.Error(fmt.Sprintf("Error creating snapshot file: %s", err))
|
|
return 1
|
|
}
|
|
if _, err := io.Copy(f, snap); err != nil {
|
|
f.Close()
|
|
c.UI.Error(fmt.Sprintf("Error writing snapshot file: %s", err))
|
|
return 1
|
|
}
|
|
if err := f.Close(); err != nil {
|
|
c.UI.Error(fmt.Sprintf("Error closing snapshot file after writing: %s", err))
|
|
return 1
|
|
}
|
|
|
|
// Read it back to verify.
|
|
f, err = os.Open(file)
|
|
if err != nil {
|
|
c.UI.Error(fmt.Sprintf("Error opening snapshot file for verify: %s", err))
|
|
return 1
|
|
}
|
|
if _, err := snapshot.Verify(f); err != nil {
|
|
f.Close()
|
|
c.UI.Error(fmt.Sprintf("Error verifying snapshot file: %s", err))
|
|
return 1
|
|
}
|
|
if err := f.Close(); err != nil {
|
|
c.UI.Error(fmt.Sprintf("Error closing snapshot file after verify: %s", err))
|
|
return 1
|
|
}
|
|
|
|
c.UI.Info(fmt.Sprintf("Saved and verified snapshot to index %d", qm.LastIndex))
|
|
return 0
|
|
}
|
|
|
|
func (c *cmd) Synopsis() string {
|
|
return synopsis
|
|
}
|
|
|
|
func (c *cmd) Help() string {
|
|
return c.help
|
|
}
|
|
|
|
const synopsis = "Saves snapshot of Consul server state"
|
|
const help = `
|
|
Usage: consul snapshot save [options] FILE
|
|
|
|
Retrieves an atomic, point-in-time snapshot of the state of the Consul servers
|
|
which includes key/value entries, service catalog, prepared queries, sessions,
|
|
and ACLs.
|
|
|
|
If ACLs are enabled, a management token must be supplied in order to perform
|
|
snapshot operations.
|
|
|
|
To create a snapshot from the leader server and save it to "backup.snap":
|
|
|
|
$ consul snapshot save backup.snap
|
|
|
|
To create a potentially stale snapshot from any available server (useful if no
|
|
leader is available):
|
|
|
|
$ consul snapshot save -stale backup.snap
|
|
|
|
For a full list of options and examples, please see the Consul documentation.
|
|
`
|