mirror of https://github.com/status-im/consul.git
Add connect expose CLI command
This commit is contained in:
parent
fed7489a37
commit
b874c8ef0c
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@ -9,6 +9,8 @@ import (
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"github.com/hashicorp/consul/agent/structs"
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)
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const ConfigEntryNotFoundErr string = "Config entry not found"
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// Config switches on the different CRUD operations for config entries.
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func (s *HTTPServer) Config(resp http.ResponseWriter, req *http.Request) (interface{}, error) {
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switch req.Method {
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@ -48,7 +50,7 @@ func (s *HTTPServer) configGet(resp http.ResponseWriter, req *http.Request) (int
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setMeta(resp, &reply.QueryMeta)
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if reply.Entry == nil {
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return nil, NotFoundError{Reason: fmt.Sprintf("Config entry not found for %q / %q", pathArgs[0], pathArgs[1])}
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return nil, NotFoundError{Reason: fmt.Sprintf("%s for %q / %q", ConfigEntryNotFoundErr, pathArgs[0], pathArgs[1])}
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}
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return reply.Entry, nil
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@ -51,7 +51,8 @@ import (
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caget "github.com/hashicorp/consul/command/connect/ca/get"
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caset "github.com/hashicorp/consul/command/connect/ca/set"
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"github.com/hashicorp/consul/command/connect/envoy"
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"github.com/hashicorp/consul/command/connect/envoy/pipe-bootstrap"
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pipebootstrap "github.com/hashicorp/consul/command/connect/envoy/pipe-bootstrap"
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"github.com/hashicorp/consul/command/connect/expose"
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"github.com/hashicorp/consul/command/connect/proxy"
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"github.com/hashicorp/consul/command/debug"
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"github.com/hashicorp/consul/command/event"
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@ -169,6 +170,7 @@ func init() {
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Register("connect proxy", func(ui cli.Ui) (cli.Command, error) { return proxy.New(ui, MakeShutdownCh()), nil })
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Register("connect envoy", func(ui cli.Ui) (cli.Command, error) { return envoy.New(ui), nil })
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Register("connect envoy pipe-bootstrap", func(ui cli.Ui) (cli.Command, error) { return pipebootstrap.New(ui), nil })
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Register("connect expose", func(ui cli.Ui) (cli.Command, error) { return expose.New(ui), nil })
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Register("debug", func(ui cli.Ui) (cli.Command, error) { return debug.New(ui, MakeShutdownCh()), nil })
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Register("event", func(ui cli.Ui) (cli.Command, error) { return event.New(ui), nil })
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Register("exec", func(ui cli.Ui) (cli.Command, error) { return exec.New(ui, MakeShutdownCh()), nil })
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@ -0,0 +1,236 @@
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package expose
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import (
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"flag"
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"fmt"
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"strconv"
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"strings"
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"github.com/hashicorp/consul/agent"
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"github.com/hashicorp/consul/api"
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"github.com/hashicorp/consul/command/flags"
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"github.com/hashicorp/consul/command/intention/create"
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"github.com/hashicorp/consul/command/intention/finder"
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"github.com/mitchellh/cli"
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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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ingressGateway string
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service string
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portRaw string
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port int
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protocol 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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c.flags.StringVar(&c.ingressGateway, "ingress-gateway", "",
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"The name of the ingress gateway service to use. Required.")
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c.flags.StringVar(&c.service, "service", "",
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"The name of destination service to expose. Required.")
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c.flags.StringVar(&c.portRaw, "port", "",
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"The listener port to use for the service on the Ingress gateway. Required.")
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c.flags.StringVar(&c.protocol, "protocol", "tcp",
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"The protocol for the service. Defaults to 'tcp'. Optional.")
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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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if err == flag.ErrHelp {
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return 0
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}
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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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// Set up a client.
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client, err := c.http.APIClient()
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if err != nil {
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c.UI.Error(fmt.Sprintf("Error initializing client: %s", err))
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return 1
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}
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// Check for any missing or invalid flag values.
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if c.service == "" {
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c.UI.Error("A service name must be given via the -service flag.")
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return 1
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}
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svc, svcNamespace, err := create.ParseIntentionTarget(c.service)
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if err != nil {
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c.UI.Error(fmt.Sprintf("Invalid service name: %s", err))
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return 1
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}
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if c.ingressGateway == "" {
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c.UI.Error("An ingress gateway service must be given via the -ingress-gateway flag.")
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return 1
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}
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gateway, gatewayNamespace, err := create.ParseIntentionTarget(c.ingressGateway)
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if err != nil {
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c.UI.Error(fmt.Sprintf("Invalid ingress gateway name: %s", err))
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return 1
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}
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if c.portRaw == "" {
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c.UI.Error("A port must be provided via the -port flag.")
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return 1
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} else {
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c.port, err = strconv.Atoi(c.portRaw)
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if err != nil {
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c.UI.Error(fmt.Sprintf("Error parsing port: %s", err))
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return 1
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}
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}
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// First get the config entry for the ingress gateway, if it exists. Don't error if it's a 404 as that
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// just means we'll need to create a new config entry.
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conf, _, err := client.ConfigEntries().Get(api.IngressGateway, gateway, nil)
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if err != nil && !strings.Contains(err.Error(), agent.ConfigEntryNotFoundErr) {
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c.UI.Error(fmt.Sprintf("Error fetching existing ingress gateway configuration: %s", err))
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return 1
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}
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if conf == nil {
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conf = &api.IngressGatewayConfigEntry{
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Kind: api.IngressGateway,
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Name: gateway,
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Namespace: gatewayNamespace,
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}
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}
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// Make sure the flags don't conflict with existing config.
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ingressConf, ok := conf.(*api.IngressGatewayConfigEntry)
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if !ok {
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// This should never happen
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c.UI.Error(fmt.Sprintf("Config entry is an invalid type: %T", conf))
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return 1
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}
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listenerIdx := -1
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for i, listener := range ingressConf.Listeners {
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// Make sure the service isn't already exposed in this gateway
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for _, service := range listener.Services {
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if service.Name == svc {
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c.UI.Error(fmt.Sprintf("Service %q already exposed through listener with port %d", svc, listener.Port))
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goto CREATE_INTENTION
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}
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}
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// If there's already a listener for the given port, make sure the protocol matches.
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if listener.Port == c.port {
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listenerIdx = i
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if listener.Protocol != c.protocol {
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c.UI.Error(fmt.Sprintf("Listener on port %d already configured with conflicting protocol %q", listener.Port, listener.Protocol))
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return 1
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}
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}
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}
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// Add a service to the existing listener for the port if one exists, or make a new listener.
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if listenerIdx >= 0 {
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ingressConf.Listeners[listenerIdx].Services = append(ingressConf.Listeners[listenerIdx].Services, api.IngressService{
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Name: svc,
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Namespace: svcNamespace,
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})
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} else {
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ingressConf.Listeners = append(ingressConf.Listeners, api.IngressListener{
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Port: c.port,
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Protocol: c.protocol,
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Services: []api.IngressService{
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{
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Name: svc,
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Namespace: svcNamespace,
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},
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},
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})
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}
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// Write the updated config entry using a check-and-set, so it fails if the entry
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// has been changed since we looked it up.
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{
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succeeded, _, err := client.ConfigEntries().CAS(ingressConf, ingressConf.GetModifyIndex(), nil)
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if err != nil {
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c.UI.Error(fmt.Sprintf("Error writing ingress config entry: %v", err))
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return 1
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}
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if !succeeded {
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c.UI.Error("Ingress config entry was changed while attempting to update, please try again.")
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return 1
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}
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c.UI.Output(fmt.Sprintf("Successfully updated config entry for ingress service %q", gateway))
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}
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CREATE_INTENTION:
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// Check for an existing intention.
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ixnFinder := finder.Finder{Client: client}
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existing, err := ixnFinder.Find(c.ingressGateway, c.service)
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if err != nil {
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c.UI.Error(fmt.Sprintf("Error looking up existing intention: %s", err))
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return 1
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}
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if existing != nil && existing.Action == api.IntentionActionAllow {
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c.UI.Error(fmt.Sprintf("Intention already exists for %q -> %q", c.ingressGateway, c.service))
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return 0
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}
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// Add the intention between the gateway service and the destination.
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ixn := &api.Intention{
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SourceName: gateway,
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SourceNS: gatewayNamespace,
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DestinationName: svc,
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DestinationNS: svcNamespace,
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SourceType: api.IntentionSourceConsul,
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Action: api.IntentionActionAllow,
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}
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if existing == nil {
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_, _, err = client.Connect().IntentionCreate(ixn, nil)
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if err != nil {
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c.UI.Error(fmt.Sprintf("Error creating intention: %s", err))
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return 1
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}
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} else {
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_, err = client.Connect().IntentionUpdate(ixn, nil)
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if err != nil {
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c.UI.Error(fmt.Sprintf("Error updating intention: %s", err))
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return 1
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}
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}
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c.UI.Output(fmt.Sprintf("Successfully set up intention for %q -> %q", c.ingressGateway, c.service))
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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 synopsis = "Expose a Connect-enabled service through an Ingress gateway"
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const help = `
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Usage: consul connect expose [options]
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Exposes a Connect-enabled service through the given ingress gateway, using the
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given protocol and port.
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`
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@ -0,0 +1,289 @@
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package expose
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import (
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"testing"
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"github.com/hashicorp/consul/agent"
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"github.com/hashicorp/consul/api"
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"github.com/hashicorp/consul/testrpc"
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"github.com/mitchellh/cli"
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"github.com/stretchr/testify/require"
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)
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func TestConnectExpose(t *testing.T) {
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t.Parallel()
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require := require.New(t)
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a := agent.NewTestAgent(t, ``)
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client := a.Client()
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defer a.Shutdown()
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testrpc.WaitForTestAgent(t, a.RPC, "dc1")
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{
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ui := cli.NewMockUi()
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c := New(ui)
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args := []string{
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"-http-addr=" + a.HTTPAddr(),
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"-service=foo",
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"-ingress-gateway=ingress",
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"-port=8888",
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"-protocol=tcp",
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}
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code := c.Run(args)
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if code != 0 {
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t.Fatalf("bad: %d. %#v", code, ui.ErrorWriter.String())
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}
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}
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// Make sure the config entry and intention have been created.
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entry, _, err := client.ConfigEntries().Get(api.IngressGateway, "ingress", nil)
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require.NoError(err)
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expected := &api.IngressGatewayConfigEntry{
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Kind: api.IngressGateway,
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Name: "ingress",
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Listeners: []api.IngressListener{
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{
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Port: 8888,
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Protocol: "tcp",
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Services: []api.IngressService{
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{
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Name: "foo",
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},
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},
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},
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},
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}
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expected.CreateIndex = entry.GetCreateIndex()
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expected.ModifyIndex = entry.GetModifyIndex()
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require.Equal(expected, entry)
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ixns, _, err := client.Connect().Intentions(nil)
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require.NoError(err)
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require.Len(ixns, 1)
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require.Equal("ingress", ixns[0].SourceName)
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require.Equal("foo", ixns[0].DestinationName)
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// Run the command again with a different port, make sure the config entry
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// and intentions aren't modified.
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{
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ui := cli.NewMockUi()
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c := New(ui)
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args := []string{
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"-http-addr=" + a.HTTPAddr(),
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"-service=foo",
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"-ingress-gateway=ingress",
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"-port=7777",
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"-protocol=tcp",
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}
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code := c.Run(args)
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if code != 0 {
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t.Fatalf("bad: %d. %#v", code, ui.ErrorWriter.String())
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}
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// Make sure the config entry/intention weren't affected.
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entry, _, err = client.ConfigEntries().Get(api.IngressGateway, "ingress", nil)
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require.NoError(err)
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require.Equal(expected, entry)
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ixns, _, err = client.Connect().Intentions(nil)
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require.NoError(err)
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require.Len(ixns, 1)
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require.Equal("ingress", ixns[0].SourceName)
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require.Equal("foo", ixns[0].DestinationName)
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}
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// Run the command again with a conflicting protocol, should exit with an error and
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// cause no changes to config entry/intentions.
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{
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ui := cli.NewMockUi()
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c := New(ui)
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args := []string{
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"-http-addr=" + a.HTTPAddr(),
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"-service=bar",
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"-ingress-gateway=ingress",
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"-port=8888",
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"-protocol=http",
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}
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code := c.Run(args)
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if code != 1 {
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t.Fatalf("bad: %d. %#v", code, ui.ErrorWriter.String())
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}
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require.Contains(ui.ErrorWriter.String(), `conflicting protocol "tcp"`)
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// Make sure the config entry/intention weren't affected.
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entry, _, err = client.ConfigEntries().Get(api.IngressGateway, "ingress", nil)
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require.NoError(err)
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require.Equal(expected, entry)
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ixns, _, err = client.Connect().Intentions(nil)
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require.NoError(err)
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require.Len(ixns, 1)
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require.Equal("ingress", ixns[0].SourceName)
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require.Equal("foo", ixns[0].DestinationName)
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}
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}
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func TestConnectExpose_invalidFlags(t *testing.T) {
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t.Parallel()
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require := require.New(t)
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a := agent.NewTestAgent(t, ``)
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defer a.Shutdown()
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testrpc.WaitForTestAgent(t, a.RPC, "dc1")
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t.Run("missing service", func(t *testing.T) {
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ui := cli.NewMockUi()
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c := New(ui)
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args := []string{
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"-http-addr=" + a.HTTPAddr(),
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}
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code := c.Run(args)
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if code != 1 {
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t.Fatalf("bad: %d. %#v", code, ui.ErrorWriter.String())
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}
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require.Contains(ui.ErrorWriter.String(), "A service name must be given")
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})
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t.Run("missing gateway", func(t *testing.T) {
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ui := cli.NewMockUi()
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c := New(ui)
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args := []string{
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"-http-addr=" + a.HTTPAddr(),
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"-service=foo",
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}
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code := c.Run(args)
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if code != 1 {
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t.Fatalf("bad: %d. %#v", code, ui.ErrorWriter.String())
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}
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require.Contains(ui.ErrorWriter.String(), "An ingress gateway service must be given")
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})
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t.Run("missing port", func(t *testing.T) {
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ui := cli.NewMockUi()
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c := New(ui)
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args := []string{
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"-http-addr=" + a.HTTPAddr(),
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"-service=foo",
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"-ingress-gateway=ingress",
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}
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code := c.Run(args)
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if code != 1 {
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t.Fatalf("bad: %d. %#v", code, ui.ErrorWriter.String())
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}
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require.Contains(ui.ErrorWriter.String(), "A port must be provided")
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})
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}
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func TestConnectExpose_existingConfig(t *testing.T) {
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t.Parallel()
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require := require.New(t)
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a := agent.NewTestAgent(t, ``)
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client := a.Client()
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defer a.Shutdown()
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// Create some service config entries to set their protocol.
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for _, service := range []string{"bar", "zoo"} {
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_, _, err := client.ConfigEntries().Set(&api.ServiceConfigEntry{
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Kind: "service-defaults",
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Name: service,
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Protocol: "http",
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}, nil)
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require.NoError(err)
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}
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// Create an existing ingress config entry with some services.
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ingressConf := &api.IngressGatewayConfigEntry{
|
||||
Kind: api.IngressGateway,
|
||||
Name: "ingress",
|
||||
Listeners: []api.IngressListener{
|
||||
{
|
||||
Port: 8888,
|
||||
Protocol: "tcp",
|
||||
Services: []api.IngressService{
|
||||
{
|
||||
Name: "foo",
|
||||
},
|
||||
},
|
||||
},
|
||||
{
|
||||
Port: 9999,
|
||||
Protocol: "http",
|
||||
Services: []api.IngressService{
|
||||
{
|
||||
Name: "bar",
|
||||
},
|
||||
},
|
||||
},
|
||||
},
|
||||
}
|
||||
_, _, err := client.ConfigEntries().Set(ingressConf, nil)
|
||||
require.NoError(err)
|
||||
|
||||
// Add a service on a new port.
|
||||
testrpc.WaitForTestAgent(t, a.RPC, "dc1")
|
||||
{
|
||||
ui := cli.NewMockUi()
|
||||
c := New(ui)
|
||||
args := []string{
|
||||
"-http-addr=" + a.HTTPAddr(),
|
||||
"-service=baz",
|
||||
"-ingress-gateway=ingress",
|
||||
"-port=10000",
|
||||
"-protocol=tcp",
|
||||
}
|
||||
|
||||
code := c.Run(args)
|
||||
if code != 0 {
|
||||
t.Fatalf("bad: %d. %#v", code, ui.ErrorWriter.String())
|
||||
}
|
||||
|
||||
// Make sure the ingress config was updated and existing services preserved.
|
||||
entry, _, err := client.ConfigEntries().Get(api.IngressGateway, "ingress", nil)
|
||||
require.NoError(err)
|
||||
|
||||
ingressConf.Listeners = append(ingressConf.Listeners, api.IngressListener{
|
||||
Port: 10000,
|
||||
Protocol: "tcp",
|
||||
Services: []api.IngressService{
|
||||
{
|
||||
Name: "baz",
|
||||
},
|
||||
},
|
||||
})
|
||||
ingressConf.CreateIndex = entry.GetCreateIndex()
|
||||
ingressConf.ModifyIndex = entry.GetModifyIndex()
|
||||
require.Equal(ingressConf, entry)
|
||||
}
|
||||
|
||||
// Add an service on a port shared with an existing listener.
|
||||
testrpc.WaitForTestAgent(t, a.RPC, "dc1")
|
||||
{
|
||||
ui := cli.NewMockUi()
|
||||
c := New(ui)
|
||||
args := []string{
|
||||
"-http-addr=" + a.HTTPAddr(),
|
||||
"-service=zoo",
|
||||
"-ingress-gateway=ingress",
|
||||
"-port=9999",
|
||||
"-protocol=http",
|
||||
}
|
||||
|
||||
code := c.Run(args)
|
||||
if code != 0 {
|
||||
t.Fatalf("bad: %d. %#v", code, ui.ErrorWriter.String())
|
||||
}
|
||||
|
||||
// Make sure the ingress config was updated and existing services preserved.
|
||||
entry, _, err := client.ConfigEntries().Get(api.IngressGateway, "ingress", nil)
|
||||
require.NoError(err)
|
||||
|
||||
ingressConf.Listeners[1].Services = append(ingressConf.Listeners[1].Services, api.IngressService{
|
||||
Name: "zoo",
|
||||
})
|
||||
ingressConf.CreateIndex = entry.GetCreateIndex()
|
||||
ingressConf.ModifyIndex = entry.GetModifyIndex()
|
||||
require.Equal(ingressConf, entry)
|
||||
}
|
||||
}
|
|
@ -136,10 +136,10 @@ func (c *cmd) Run(args []string) int {
|
|||
return 0
|
||||
}
|
||||
|
||||
// parseIntentionTarget parses a target of the form <namespace>/<name> and returns
|
||||
// ParseIntentionTarget parses a target of the form <namespace>/<name> and returns
|
||||
// the two distinct parts. In some cases the namespace may be elided and this function
|
||||
// will return the empty string for the namespace then.
|
||||
func parseIntentionTarget(input string) (name string, namespace string, err error) {
|
||||
func ParseIntentionTarget(input string) (name string, namespace string, err error) {
|
||||
// Get the index to the '/'. If it doesn't exist, we have just a name
|
||||
// so just set that and return.
|
||||
idx := strings.IndexByte(input, '/')
|
||||
|
@ -171,12 +171,12 @@ func (c *cmd) ixnsFromArgs(args []string) ([]*api.Intention, error) {
|
|||
return nil, fmt.Errorf("Must specify two arguments: source and destination")
|
||||
}
|
||||
|
||||
srcName, srcNamespace, err := parseIntentionTarget(args[0])
|
||||
srcName, srcNamespace, err := ParseIntentionTarget(args[0])
|
||||
if err != nil {
|
||||
return nil, fmt.Errorf("Invalid intention source: %v", err)
|
||||
}
|
||||
|
||||
dstName, dstNamespace, err := parseIntentionTarget(args[1])
|
||||
dstName, dstNamespace, err := ParseIntentionTarget(args[1])
|
||||
if err != nil {
|
||||
return nil, fmt.Errorf("Invalid intention destination: %v", err)
|
||||
}
|
||||
|
|
Loading…
Reference in New Issue