136 lines
3.8 KiB
Go
136 lines
3.8 KiB
Go
// Copyright (c) HashiCorp, Inc.
|
|
// SPDX-License-Identifier: MPL-2.0
|
|
|
|
package upstreams
|
|
|
|
import (
|
|
"flag"
|
|
"fmt"
|
|
"net"
|
|
"os"
|
|
"strconv"
|
|
"strings"
|
|
|
|
"github.com/hashicorp/consul/command/cli"
|
|
"github.com/hashicorp/consul/command/flags"
|
|
troubleshoot "github.com/hashicorp/consul/troubleshoot/proxy"
|
|
)
|
|
|
|
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
|
|
envoyAdminEndpoint string
|
|
}
|
|
|
|
func (c *cmd) init() {
|
|
c.flags = flag.NewFlagSet("", flag.ContinueOnError)
|
|
|
|
defaultEnvoyAdminEndpoint := "localhost:19000"
|
|
if envoyAdminEndpoint := os.Getenv("ENVOY_ADMIN_ENDPOINT"); envoyAdminEndpoint != "" {
|
|
defaultEnvoyAdminEndpoint = envoyAdminEndpoint
|
|
}
|
|
c.flags.StringVar(&c.envoyAdminEndpoint, "envoy-admin-endpoint", defaultEnvoyAdminEndpoint, "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.envoyAdminEndpoint)
|
|
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 envoy admin endpoint: " + err.Error())
|
|
c.UI.Error("Please make sure Envoy's Admin API is enabled.")
|
|
return 1
|
|
}
|
|
|
|
t, err := troubleshoot.NewTroubleshoot(adminBindIP, adminPort)
|
|
if err != nil {
|
|
c.UI.Error("error generating troubleshoot client: " + err.Error())
|
|
return 1
|
|
}
|
|
envoyIDs, upstreamIPs, err := t.GetUpstreams()
|
|
if err != nil {
|
|
c.UI.Error("error calling GetUpstreams: " + err.Error())
|
|
return 1
|
|
}
|
|
|
|
c.UI.HeaderOutput(fmt.Sprintf("Upstreams (explicit upstreams only) (%v)\n", len(envoyIDs)))
|
|
for _, u := range envoyIDs {
|
|
c.UI.UnchangedOutput(u)
|
|
}
|
|
|
|
c.UI.HeaderOutput(fmt.Sprintf("Upstream IPs (transparent proxy only) (%v)", len(upstreamIPs)))
|
|
tbl := cli.NewTable("IPs ", "Virtual ", "Cluster Names")
|
|
for _, u := range upstreamIPs {
|
|
tbl.AddRow([]string{formatIPs(u.IPs), strconv.FormatBool(u.IsVirtual), formatClusterNames(u.ClusterNames)}, []string{})
|
|
}
|
|
c.UI.Table(tbl)
|
|
|
|
c.UI.UnchangedOutput("\nIf you cannot find the upstream address or cluster for a transparent proxy upstream:")
|
|
c.UI.UnchangedOutput("-> Check intentions: Transparent proxy upstreams are configured based on intentions. Make sure you " +
|
|
"have configured intentions to allow traffic to your upstream.")
|
|
c.UI.UnchangedOutput("-> To check that the right cluster is being dialed, run a DNS lookup " +
|
|
"for the upstream you are dialing. For example, run `dig backend.svc.consul` to return the IP address for the `backend` service. If the address you get from that is missing " +
|
|
"from the upstream IPs, it means that your proxy may be misconfigured.")
|
|
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
|
|
`
|
|
)
|
|
|
|
func formatIPs(ips []string) string {
|
|
return strings.Join(ips, ", ")
|
|
}
|
|
|
|
func formatClusterNames(names map[string]struct{}) string {
|
|
var out []string
|
|
for k := range names {
|
|
out = append(out, k)
|
|
}
|
|
return strings.Join(out, ", ")
|
|
}
|