open-consul/command/config/delete/config_delete.go

176 lines
3.9 KiB
Go

package delete
import (
"errors"
"flag"
"fmt"
"github.com/hashicorp/consul/command/flags"
"github.com/hashicorp/consul/command/helpers"
"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
kind string
name string
cas bool
modifyIndex uint64
filename string
}
func (c *cmd) init() {
c.flags = flag.NewFlagSet("", flag.ContinueOnError)
c.flags.StringVar(&c.filename, "filename", "", "The filename of the config entry to delete")
c.flags.StringVar(&c.kind, "kind", "", "The kind of configuration to delete.")
c.flags.StringVar(&c.name, "name", "", "The name of configuration to delete.")
c.flags.BoolVar(&c.cas, "cas", false,
"Perform a Check-And-Set operation. Specifying this value also "+
"requires the -modify-index flag to be set. The default value "+
"is false.")
c.flags.Uint64Var(&c.modifyIndex, "modify-index", 0,
"Unsigned integer representing the ModifyIndex of the config entry. "+
"This is used in combination with the -cas flag.")
c.http = &flags.HTTPFlags{}
flags.Merge(c.flags, c.http.ClientFlags())
flags.Merge(c.flags, c.http.ServerFlags())
flags.Merge(c.flags, c.http.MultiTenancyFlags())
c.help = flags.Usage(help, c.flags)
}
func (c *cmd) Run(args []string) int {
if err := c.flags.Parse(args); err != nil {
return 1
}
if err := c.validateArgs(); err != nil {
c.UI.Error(err.Error())
return 1
}
kind := c.kind
name := c.name
var err error
if c.filename != "" {
data, err := helpers.LoadDataSourceNoRaw(c.filename, nil)
if err != nil {
c.UI.Error(fmt.Sprintf("Failed to load data: %v", err))
return 1
}
entry, err := helpers.ParseConfigEntry(data)
if err != nil {
c.UI.Error(fmt.Sprintf("Failed to decode config entry input: %v", err))
return 1
}
kind = entry.GetKind()
name = entry.GetName()
}
client, err := c.http.APIClient()
if err != nil {
c.UI.Error(fmt.Sprintf("Error connect to Consul agent: %s", err))
return 1
}
entries := client.ConfigEntries()
var deleted bool
if c.cas {
deleted, _, err = entries.DeleteCAS(kind, name, c.modifyIndex, nil)
} else {
_, err = entries.Delete(kind, name, nil)
deleted = err == nil
}
if err != nil {
c.UI.Error(fmt.Sprintf("Error deleting config entry %s/%s: %v", kind, name, err))
return 1
}
if !deleted {
c.UI.Error(fmt.Sprintf("Config entry not deleted: %s/%s", kind, name))
return 1
}
c.UI.Info(fmt.Sprintf("Config entry deleted: %s/%s", kind, name))
return 0
}
func (c *cmd) validateArgs() error {
count := 0
if c.filename != "" {
count++
}
if c.kind != "" {
count++
}
if c.name != "" {
count++
}
if count >= 3 {
return errors.New("filename can't be used with kind or name")
} else if count == 0 {
return errors.New("Must specify the -kind or -filename parameter")
}
if c.filename != "" {
if count == 2 {
return errors.New("filename can't be used with kind or name")
}
} else {
if c.kind == "" {
return errors.New("Must specify the -kind parameter")
}
if c.name == "" {
return errors.New("Must specify the -name parameter")
}
}
if c.cas && c.modifyIndex == 0 {
return errors.New("Must specify a -modify-index greater than 0 with -cas")
}
if c.modifyIndex != 0 && !c.cas {
return errors.New("Cannot specify -modify-index without -cas")
}
return nil
}
func (c *cmd) Synopsis() string {
return synopsis
}
func (c *cmd) Help() string {
return flags.Usage(help, nil)
}
const (
synopsis = "Delete a centralized config entry"
help = `
Usage: consul config delete [options] ([-kind <config kind> -name <config name>] | [-f FILENAME])
Deletes the configuration entry specified by the kind and name.
Example:
$ consul config delete -kind service-defaults -name web
$ consul config delete -filename service-defaults-web.hcl
`
)