133 lines
3.7 KiB
Go
133 lines
3.7 KiB
Go
package upstreams
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import (
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"flag"
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"fmt"
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"net"
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"os"
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"strconv"
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"strings"
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"github.com/hashicorp/consul/command/cli"
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"github.com/hashicorp/consul/command/flags"
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troubleshoot "github.com/hashicorp/consul/troubleshoot/proxy"
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)
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func New(ui cli.Ui) *cmd {
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c := &cmd{UI: ui}
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c.init()
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return c
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}
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type cmd struct {
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UI cli.Ui
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flags *flag.FlagSet
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http *flags.HTTPFlags
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help string
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// flags
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envoyAdminEndpoint string
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}
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func (c *cmd) init() {
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c.flags = flag.NewFlagSet("", flag.ContinueOnError)
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defaultEnvoyAdminEndpoint := "localhost:19000"
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if envoyAdminEndpoint := os.Getenv("ENVOY_ADMIN_ENDPOINT"); envoyAdminEndpoint != "" {
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defaultEnvoyAdminEndpoint = envoyAdminEndpoint
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}
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c.flags.StringVar(&c.envoyAdminEndpoint, "envoy-admin-endpoint", defaultEnvoyAdminEndpoint, "The address:port that envoy's admin endpoint is on.")
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c.http = &flags.HTTPFlags{}
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flags.Merge(c.flags, c.http.ClientFlags())
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flags.Merge(c.flags, c.http.ServerFlags())
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c.help = flags.Usage(help, c.flags)
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}
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func (c *cmd) Run(args []string) int {
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if err := c.flags.Parse(args); err != nil {
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c.UI.Error(fmt.Sprintf("Failed to parse args: %v", err))
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return 1
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}
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adminAddr, adminPort, err := net.SplitHostPort(c.envoyAdminEndpoint)
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if err != nil {
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c.UI.Error("Invalid Envoy Admin endpoint: " + err.Error())
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return 1
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}
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// Envoy requires IP addresses to bind too when using static so resolve DNS or
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// localhost here.
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adminBindIP, err := net.ResolveIPAddr("ip", adminAddr)
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if err != nil {
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c.UI.Error("Failed to resolve envoy admin endpoint: " + err.Error())
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c.UI.Error("Please make sure Envoy's Admin API is enabled.")
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return 1
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}
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t, err := troubleshoot.NewTroubleshoot(adminBindIP, adminPort)
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if err != nil {
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c.UI.Error("error generating troubleshoot client: " + err.Error())
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return 1
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}
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envoyIDs, upstreamIPs, err := t.GetUpstreams()
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if err != nil {
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c.UI.Error("error calling GetUpstreams: " + err.Error())
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return 1
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}
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c.UI.HeaderOutput(fmt.Sprintf("Upstreams (explicit upstreams only) (%v)\n", len(envoyIDs)))
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for _, u := range envoyIDs {
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c.UI.UnchangedOutput(u)
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}
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c.UI.HeaderOutput(fmt.Sprintf("Upstream IPs (transparent proxy only) (%v)", len(upstreamIPs)))
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tbl := cli.NewTable("IPs ", "Virtual ", "Cluster Names")
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for _, u := range upstreamIPs {
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tbl.AddRow([]string{formatIPs(u.IPs), strconv.FormatBool(u.IsVirtual), formatClusterNames(u.ClusterNames)}, []string{})
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}
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c.UI.Table(tbl)
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c.UI.UnchangedOutput("\nIf you cannot find the upstream address or cluster for a transparent proxy upstream:")
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c.UI.UnchangedOutput("-> Check intentions: Transparent proxy upstreams are configured based on intentions. Make sure you " +
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"have configured intentions to allow traffic to your upstream.")
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c.UI.UnchangedOutput("-> To check that the right cluster is being dialed, run a DNS lookup " +
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"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 " +
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"from the upstream IPs, it means that your proxy may be misconfigured.")
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return 0
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}
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func (c *cmd) Synopsis() string {
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return synopsis
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}
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func (c *cmd) Help() string {
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return c.help
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}
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const (
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synopsis = "Get upstream envoy identifiers for the current envoy instance"
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help = `
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Usage: consul troubleshoot upstreams [options]
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Connects to local Envoy and lists upstream service envoy identifiers.
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This command is used in combination with
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'consul troubleshoot proxy' to diagnose issues in Consul service mesh.
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Examples:
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$ consul troubleshoot upstreams
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`
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)
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func formatIPs(ips []string) string {
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return strings.Join(ips, ", ")
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}
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func formatClusterNames(names map[string]struct{}) string {
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var out []string
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for k := range names {
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out = append(out, k)
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}
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return strings.Join(out, ", ")
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}
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