open-consul/command/intention/get/get.go

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2018-05-12 05:19:39 +00:00
package get
import (
"flag"
"fmt"
"io"
"sort"
"time"
"github.com/hashicorp/consul/command/flags"
"github.com/hashicorp/consul/command/intention/finder"
"github.com/mitchellh/cli"
"github.com/ryanuber/columnize"
)
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
// testStdin is the input for testing.
testStdin io.Reader
}
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
}
// 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
}
// Get the intention ID to load
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f := &finder.Finder{Client: client}
id, err := f.IDFromArgs(c.flags.Args())
if err != nil {
c.UI.Error(fmt.Sprintf("Error: %s", err))
return 1
}
// Read the intention
ixn, _, err := client.Connect().IntentionGet(id, nil)
if err != nil {
c.UI.Error(fmt.Sprintf("Error reading the intention: %s", err))
return 1
}
// Format the tabular data
data := []string{
fmt.Sprintf("Source:\x1f%s", ixn.SourceString()),
fmt.Sprintf("Destination:\x1f%s", ixn.DestinationString()),
fmt.Sprintf("Action:\x1f%s", ixn.Action),
fmt.Sprintf("ID:\x1f%s", ixn.ID),
}
if v := ixn.Description; v != "" {
data = append(data, fmt.Sprintf("Description:\x1f%s", v))
}
if len(ixn.Meta) > 0 {
var keys []string
for k := range ixn.Meta {
keys = append(keys, k)
}
sort.Strings(keys)
for _, k := range keys {
data = append(data, fmt.Sprintf("Meta[%s]:\x1f%s", k, ixn.Meta[k]))
}
}
data = append(data,
fmt.Sprintf("Created At:\x1f%s", ixn.CreatedAt.Local().Format(time.RFC850)),
)
c.UI.Output(columnize.Format(data, &columnize.Config{Delim: string([]byte{0x1f})}))
return 0
}
func (c *cmd) Synopsis() string {
return synopsis
}
func (c *cmd) Help() string {
return c.help
}
const synopsis = "Show information about an intention."
const help = `
Usage: consul intention get [options] SRC DST
Usage: consul intention get [options] ID
Read and show the details about an intention. The intention can be looked
up via an exact source/destination match or via the unique intention ID.
$ consul intention get web db
`