feat(kube): create tunnel for client

glide.lock

-hash: b2c742106f6983fde0ea7c341a50ffdaef78f78e1302d15ec5dd17ea191247de
-updated: 2016-05-19T16:12:01.062464013-06:00
+hash: 2ac3dc0e19d5a688173924d35a07b4bad2454c7e6f5ff4d5a6911f33d1037586
+updated: 2016-05-24T09:51:36.455233258-07:00
 imports:
 - name: bitbucket.org/ww/goautoneg
-  version: 75cd24fc2f2c
+  version: 75cd24fc2f2c2a2088577d12123ddee5f54e0675
 - name: github.com/aokoli/goutils
   version: 9c37978a95bd5c709a15883b6242714ea6709e64
 - name: github.com/beorn7/perks
@@ -22,6 +22,17 @@ imports:
   subpackages:
   - digest
   - reference
+- name: github.com/docker/docker
+  version: 0f5c9d301b9b1cca66b3ea0f9dec3b5317d3686d
+  subpackages:
+  - pkg/jsonmessage
+  - pkg/mount
+  - pkg/stdcopy
+  - pkg/symlink
+  - pkg/term
+  - pkg/term/winconsole
+  - pkg/timeutils
+  - pkg/units
 - name: github.com/docker/engine-api
   version: 3d72d392d07bece8d7d7b2a3b6b2e57c2df376a2
   subpackages:
@@ -46,6 +57,10 @@ imports:
   - tlsconfig
 - name: github.com/docker/go-units
   version: 0bbddae09c5a5419a8c6dcdd7ff90da3d450393b
+- name: github.com/docker/spdystream
+  version: 449fdfce4d962303d702fec724ef0ad181c92528
+  subpackages:
+  - spdy
 - name: github.com/emicklei/go-restful
   version: 496d495156da218b9912f03dfa7df7f80fbd8cc3
   subpackages:
@@ -140,6 +155,8 @@ imports:
   - util/wordwrap
 - name: github.com/imdario/mergo
   version: 6633656539c1639d9d78127b7d47c622b5d7b6dc
+- name: github.com/inconshreveable/mousetrap
+  version: 76626ae9c91c4f2a10f34cad8ce83ea42c93bb75
 - name: github.com/juju/ratelimit
   version: 77ed1c8a01217656d2080ad51981f6e99adaa177
 - name: github.com/Masterminds/semver
@@ -152,6 +169,24 @@ imports:
   version: fc2b8d3a73c4867e51861bbdd5ae3c1f0869dd6a
   subpackages:
   - pbutil
+- name: github.com/opencontainers/runc
+  version: 7ca2aa4873aea7cb4265b1726acb24b90d8726c6
+  subpackages:
+  - libcontainer
+  - libcontainer/apparmor
+  - libcontainer/cgroups
+  - libcontainer/cgroups/fs
+  - libcontainer/cgroups/systemd
+  - libcontainer/configs
+  - libcontainer/configs/validate
+  - libcontainer/criurpc
+  - libcontainer/label
+  - libcontainer/seccomp
+  - libcontainer/selinux
+  - libcontainer/stacktrace
+  - libcontainer/system
+  - libcontainer/user
+  - libcontainer/utils
 - name: github.com/pborman/uuid
   version: ca53cad383cad2479bbba7f7a1a05797ec1386e4
 - name: github.com/prometheus/client_golang
@@ -170,7 +205,7 @@ imports:
 - name: github.com/prometheus/procfs
   version: 490cc6eb5fa45bf8a8b7b73c8bc82a8160e8531d
 - name: github.com/spf13/cobra
-  version: e14e47b7a916ed178f4559ebd7e625cf16410181
+  version: f368244301305f414206f889b1735a54cfc8bde8
   subpackages:
   - cobra
 - name: github.com/spf13/pflag
@@ -190,6 +225,7 @@ imports:
   - trace
   - http2/hpack
   - internal/timeseries
+  - websocket
   - context/ctxhttp
 - name: golang.org/x/oauth2
   version: b5adcc2dcdf009d0391547edc6ecbaff889f5bb9
@@ -198,6 +234,18 @@ imports:
   - internal
   - jws
   - jwt
+- name: google.golang.org/appengine
+  version: 12d5545dc1cfa6047a286d5e853841b6471f4c19
+  subpackages:
+  - internal
+  - internal/app_identity
+  - internal/base
+  - internal/datastore
+  - internal/log
+  - internal/modules
+  - internal/remote_api
+  - urlfetch
+  - internal/urlfetch
 - name: google.golang.org/cloud
   version: eb47ba841d53d93506cfbfbc03927daf9cc48f88
   subpackages:
@@ -221,12 +269,18 @@ imports:
 - name: k8s.io/kubernetes
   version: 9990f843cd62caa90445cf76b07d63ba7b5c86fd
   subpackages:
+  - pkg/api
+  - pkg/api/meta
+  - pkg/client/restclient
+  - pkg/client/unversioned
   - pkg/client/unversioned/clientcmd
+  - pkg/client/unversioned/fake
+  - pkg/client/unversioned/portforward
+  - pkg/client/unversioned/remotecommand
   - pkg/kubectl/cmd/util
   - pkg/kubectl/resource
-  - pkg/api
+  - pkg/labels
   - pkg/api/unversioned
-  - pkg/client/restclient
   - pkg/client/unversioned/auth
   - pkg/client/unversioned/clientcmd/api
   - pkg/client/unversioned/clientcmd/api/latest
@@ -234,8 +288,13 @@ imports:
   - pkg/util/errors
   - pkg/util/homedir
   - pkg/util/validation
+  - pkg/kubelet/server/portforward
+  - pkg/util/httpstream
+  - pkg/util/runtime
+  - pkg/client/transport
+  - pkg/kubelet/server/remotecommand
+  - pkg/util/httpstream/spdy
   - pkg/api/errors
-  - pkg/api/meta
   - pkg/api/validation
   - pkg/apimachinery
   - pkg/apimachinery/registered
@@ -246,11 +305,9 @@ imports:
   - pkg/apis/metrics
   - pkg/apis/policy
   - pkg/client/typed/discovery
-  - pkg/client/unversioned
   - pkg/client/unversioned/adapters/internalclientset
   - pkg/controller
   - pkg/kubectl
-  - pkg/labels
   - pkg/registry/thirdpartyresourcedata
   - pkg/runtime/serializer/json
   - pkg/util/flag
@@ -269,7 +326,6 @@ imports:
   - pkg/util/rand
   - pkg/api/v1
   - pkg/client/metrics
-  - pkg/client/transport
   - pkg/runtime/serializer/streaming
   - pkg/util/crypto
   - pkg/util/flowcontrol
@@ -280,6 +336,9 @@ imports:
   - pkg/runtime/serializer/versioning
   - pkg/conversion/queryparams
   - pkg/util/json
+  - pkg/httplog
+  - pkg/util/wsstream
+  - third_party/golang/netutil
   - pkg/util/validation/field
   - pkg/api/endpoints
   - pkg/api/pod
@@ -321,7 +380,6 @@ imports:
   - pkg/registry/generic
   - pkg/util/framer
   - third_party/forked/json
-  - pkg/util/runtime
   - third_party/forked/reflect
   - pkg/runtime/serializer/protobuf
   - pkg/runtime/serializer/recognizer

glide.yaml

@@ -24,11 +24,18 @@ import:
 - package: google.golang.org/grpc
   version: dec33edc378cf4971a2741cfd86ed70a644d6ba3
 - package: k8s.io/kubernetes
-  version: ^1.2
   subpackages:
+  - pkg/api
+  - pkg/api/meta
+  - pkg/client/restclient
+  - pkg/client/unversioned
   - pkg/client/unversioned/clientcmd
+  - pkg/client/unversioned/fake
+  - pkg/client/unversioned/portforward
+  - pkg/client/unversioned/remotecommand
   - pkg/kubectl/cmd/util
   - pkg/kubectl/resource
+  - pkg/labels
 - package: github.com/gosuri/uitable
 - package: speter.net/go/exp/math/dec/inf
   vcs: git

pkg/kube/client.go

@@ -11,13 +11,13 @@ import (
 
 // Client represents a client capable of communicating with the Kubernetes API.
 type Client struct {
-	config clientcmd.ClientConfig
+	*cmdutil.Factory
 }
 
 // New create a new Client
 func New(config clientcmd.ClientConfig) *Client {
 	return &Client{
-		config: config,
+		Factory: cmdutil.NewFactory(config),
 	}
 }
 
@@ -28,22 +28,20 @@ type ResourceActorFunc func(*resource.Info) error
 //
 // Namespace will set the namespace
 func (c *Client) Create(namespace string, reader io.Reader) error {
-	f := cmdutil.NewFactory(c.config)
-	return perform(f, namespace, reader, createResource)
+	return perform(c, namespace, reader, createResource)
 }
 
 // Delete deletes kubernetes resources from an io.reader
 //
 // Namespace will set the namespace
 func (c *Client) Delete(namespace string, reader io.Reader) error {
-	f := cmdutil.NewFactory(c.config)
-	return perform(f, namespace, reader, deleteResource)
+	return perform(c, namespace, reader, deleteResource)
 }
 
 const includeThirdPartyAPIs = false
 
-func perform(f *cmdutil.Factory, namespace string, reader io.Reader, fn ResourceActorFunc) error {
-	r := f.NewBuilder(includeThirdPartyAPIs).
+func perform(c *Client, namespace string, reader io.Reader, fn ResourceActorFunc) error {
+	r := c.NewBuilder(includeThirdPartyAPIs).
 		ContinueOnError().
 		NamespaceParam(namespace).
 		RequireNamespace().

pkg/kube/client_test.go

@@ -7,7 +7,6 @@ import (
 
 	"k8s.io/kubernetes/pkg/api/meta"
 	"k8s.io/kubernetes/pkg/client/unversioned/fake"
-	cmdutil "k8s.io/kubernetes/pkg/kubectl/cmd/util"
 	"k8s.io/kubernetes/pkg/kubectl/resource"
 )
 
@@ -46,12 +45,12 @@ func TestPerform(t *testing.T) {
 			return nil
 		}
 
-		f := cmdutil.NewFactory(nil)
-		f.ClientForMapping = func(mapping *meta.RESTMapping) (resource.RESTClient, error) {
+		c := New(nil)
+		c.ClientForMapping = func(mapping *meta.RESTMapping) (resource.RESTClient, error) {
 			return &fake.RESTClient{}, nil
 		}
 
-		err := perform(f, tt.namespace, tt.reader, fn)
+		err := perform(c, tt.namespace, tt.reader, fn)
 		if (err != nil) != tt.err {
 			t.Errorf("%q. expected error: %v, got %v", tt.name, tt.err, err)
 		}

pkg/kube/tunnel.go

+package kube
+
+import (
+	"bytes"
+	"fmt"
+	"net"
+	"strconv"
+
+	"k8s.io/kubernetes/pkg/client/unversioned/portforward"
+	"k8s.io/kubernetes/pkg/client/unversioned/remotecommand"
+)
+
+type Tunnel struct {
+	Local    int
+	Remote   int
+	stopChan chan struct{}
+}
+
+// Close disconnects a tunnel connection
+func (t *Tunnel) Close() {
+	close(t.stopChan)
+}
+
+// ForwardPort opens a tunnel to a kubernetes pod
+func (c *Client) ForwardPort(namespace, podName string, remote int) (*Tunnel, error) {
+	client, err := c.Client()
+	if err != nil {
+		return nil, err
+	}
+
+	config, err := c.ClientConfig()
+	if err != nil {
+		return nil, err
+	}
+
+	// http://192.168.64.94:8080/api/v1/namespaces/helm/pods/tiller-rc-9itlq/portforward
+	u := client.RESTClient.Post().
+		Resource("pods").
+		Namespace(namespace).
+		Name(podName).
+		SubResource("portforward").URL()
+
+	dialer, err := remotecommand.NewExecutor(config, "POST", u)
+	if err != nil {
+		return nil, err
+	}
+
+	local, err := getAvailablePort()
+	if err != nil {
+		return nil, err
+	}
+
+	t := &Tunnel{
+		Local:    local,
+		Remote:   remote,
+		stopChan: make(chan struct{}, 1),
+	}
+
+	ports := []string{fmt.Sprintf("%d:%d", local, remote)}
+
+	var b bytes.Buffer
+	pf, err := portforward.New(dialer, ports, t.stopChan, &b, &b)
+	if err != nil {
+		return nil, err
+	}
+
+	go func() {
+		if err := pf.ForwardPorts(); err != nil {
+			fmt.Printf("Error forwarding ports: %v\n", err)
+		}
+	}()
+
+	// wait for listeners to start
+	<-pf.Ready
+
+	return t, nil
+}
+
+func getAvailablePort() (int, error) {
+	l, err := net.Listen("tcp", ":0")
+	if err != nil {
+		return 0, err
+	}
+	defer l.Close()
+
+	_, p, err := net.SplitHostPort(l.Addr().String())
+	port, err := strconv.Atoi(p)
+	if err != nil {
+		return 0, err
+	}
+	return port, err
+}

pkg/kube/tunnel_test.go

+package kube
+
+import (
+	"testing"
+)
+
+func TestAvailablePort(t *testing.T) {
+	port, err := getAvailablePort()
+	if err != nil {
+		t.Fatal(err)
+	}
+	if port < 1 {
+		t.Fatalf("generated port should be > 1, got %d", port)
+	}
+}