consul/command/troubleshoot/upstreams/troubleshoot_upstreams.go

103 lines
2.2 KiB
Go

package upstreams
import (
"flag"
"fmt"
"net"
"os"
"github.com/hashicorp/consul/command/flags"
troubleshoot "github.com/hashicorp/consul/troubleshoot"
"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
// flags
adminBind string
}
func (c *cmd) init() {
c.flags = flag.NewFlagSet("", flag.ContinueOnError)
defaultAdminBind := "localhost:19000"
if adminBind := os.Getenv("ADMIN_BIND"); adminBind != "" {
defaultAdminBind = adminBind
}
c.flags.StringVar(&c.adminBind, "admin-bind", defaultAdminBind, "The address:port that envoy's admin endpoint is on.")
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 {
c.UI.Error(fmt.Sprintf("Failed to parse args: %v", err))
return 1
}
adminAddr, adminPort, err := net.SplitHostPort(c.adminBind)
if err != nil {
c.UI.Error("Invalid Envoy Admin endpoint: " + err.Error())
return 1
}
// Envoy requires IP addresses to bind too when using static so resolve DNS or
// localhost here.
adminBindIP, err := net.ResolveIPAddr("ip", adminAddr)
if err != nil {
c.UI.Error("Failed to resolve admin bind address: " + err.Error())
return 1
}
t, err := troubleshoot.NewTroubleshoot(adminBindIP, adminPort)
if err != nil {
c.UI.Error("error generating troubleshoot client: " + err.Error())
return 1
}
upstreams, err := t.GetUpstreams()
if err != nil {
c.UI.Error("error calling GetUpstreams: " + err.Error())
return 1
}
for _, u := range upstreams {
c.UI.Output(u)
}
return 0
}
func (c *cmd) Synopsis() string {
return synopsis
}
func (c *cmd) Help() string {
return c.help
}
const (
synopsis = "Get upstream envoy identifiers for the current envoy instance"
help = `
Usage: consul troubleshoot upstreams [options]
Connects to local Envoy and lists upstream service envoy identifiers.
This command is used in combination with
'consul troubleshoot proxy' to diagnose issues in Consul service mesh.
Examples:
$ consul troubleshoot upstreams
`
)