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kube_integration_test.go
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kube_integration_test.go
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/*
Copyright 2016-2020 Gravitational, Inc.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package integration
import (
"bytes"
"context"
"crypto/tls"
"crypto/x509"
"fmt"
"io"
"io/ioutil"
"net"
"net/http"
"net/url"
"os"
"os/user"
"strconv"
"testing"
"time"
"github.com/gravitational/teleport"
"github.com/gravitational/teleport/api/profile"
"github.com/gravitational/teleport/api/types"
"github.com/gravitational/teleport/lib"
"github.com/gravitational/teleport/lib/auth/testauthority"
"github.com/gravitational/teleport/lib/events"
"github.com/gravitational/teleport/lib/service"
"github.com/gravitational/teleport/lib/services"
"github.com/gravitational/teleport/lib/session"
"github.com/gravitational/teleport/lib/tlsca"
"github.com/gravitational/teleport/lib/utils"
apidefaults "github.com/gravitational/teleport/api/defaults"
kubeutils "github.com/gravitational/teleport/lib/kube/utils"
"github.com/gravitational/trace"
"github.com/stretchr/testify/require"
"golang.org/x/net/http2"
"k8s.io/apimachinery/pkg/api/errors"
"k8s.io/client-go/kubernetes"
"k8s.io/client-go/rest"
"k8s.io/client-go/tools/portforward"
"k8s.io/client-go/tools/remotecommand"
"k8s.io/client-go/transport"
"k8s.io/client-go/transport/spdy"
log "github.com/sirupsen/logrus"
v1 "k8s.io/api/core/v1"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
streamspdy "k8s.io/apimachinery/pkg/util/httpstream/spdy"
)
type KubeSuite struct {
*kubernetes.Clientset
me *user.User
// priv/pub pair to avoid re-generating it
priv []byte
pub []byte
// kubeconfigPath is a path to valid kubeconfig
kubeConfigPath string
// kubeConfig is a kubernetes config struct
kubeConfig *rest.Config
// log defines the test-specific logger
log utils.Logger
}
func newKubeSuite(t *testing.T) *KubeSuite {
testEnabled := os.Getenv(teleport.KubeRunTests)
if ok, _ := strconv.ParseBool(testEnabled); !ok {
t.Skip("Skipping Kubernetes test suite.")
}
suite := &KubeSuite{
kubeConfigPath: os.Getenv(teleport.EnvKubeConfig),
}
require.NotEmpty(t, suite.kubeConfigPath, "This test requires path to valid kubeconfig.")
var err error
SetTestTimeouts(time.Millisecond * time.Duration(100))
suite.priv, suite.pub, err = testauthority.New().GenerateKeyPair("")
require.NoError(t, err)
suite.me, err = user.Current()
require.NoError(t, err)
// close & re-open stdin because 'go test' runs with os.stdin connected to /dev/null
stdin, err := os.Open("/dev/tty")
if err == nil {
os.Stdin.Close()
os.Stdin = stdin
}
t.Cleanup(func() {
var err error
// restore os.Stdin to its original condition: connected to /dev/null
os.Stdin.Close()
os.Stdin, err = os.Open("/dev/null")
require.NoError(t, err)
})
suite.Clientset, suite.kubeConfig, err = kubeutils.GetKubeClient(suite.kubeConfigPath)
require.NoError(t, err)
// Create test namespace and pod to run k8s commands against.
ns := newNamespace(testNamespace)
_, err = suite.CoreV1().Namespaces().Create(context.Background(), ns, metav1.CreateOptions{})
if err != nil {
require.True(t, errors.IsAlreadyExists(err), "Failed to create namespace: %v:", err)
}
p := newPod(testNamespace, testPod)
_, err = suite.CoreV1().Pods(testNamespace).Create(context.Background(), p, metav1.CreateOptions{})
if err != nil {
require.True(t, errors.IsAlreadyExists(err), "Failed to create test pod: %v", err)
}
return suite
}
// For this test suite to work, the target Kubernetes cluster must have the
// following RBAC objects configured:
// https://github.com/gravitational/teleport/blob/master/fixtures/ci-teleport-rbac/ci-teleport.yaml
const testImpersonationGroup = "teleport-ci-test-group"
type kubeIntegrationTest func(t *testing.T, suite *KubeSuite)
func (s *KubeSuite) bind(test kubeIntegrationTest) func(t *testing.T) {
return func(t *testing.T) {
s.log = utils.NewLoggerForTests()
os.RemoveAll(profile.FullProfilePath(""))
t.Cleanup(func() { s.log = nil })
test(t, s)
}
}
func TestKube(t *testing.T) {
suite := newKubeSuite(t)
t.Run("Exec", suite.bind(testKubeExec))
t.Run("Deny", suite.bind(testKubeDeny))
t.Run("PortForward", suite.bind(testKubePortForward))
t.Run("TransportProtocol", suite.bind(testKubeTransportProtocol))
t.Run("TrustedClustersClientCert", suite.bind(testKubeTrustedClustersClientCert))
t.Run("TrustedClustersSNI", suite.bind(testKubeTrustedClustersSNI))
t.Run("Disconnect", suite.bind(testKubeDisconnect))
}
// TestKubeExec tests kubernetes Exec command set
func testKubeExec(t *testing.T, suite *KubeSuite) {
tconf := suite.teleKubeConfig(Host)
teleport := NewInstance(InstanceConfig{
ClusterName: Site,
HostID: HostID,
NodeName: Host,
Priv: suite.priv,
Pub: suite.pub,
log: suite.log,
})
username := suite.me.Username
kubeGroups := []string{testImpersonationGroup}
kubeUsers := []string{"[email protected]"}
role, err := types.NewRole("kubemaster", types.RoleSpecV4{
Allow: types.RoleConditions{
Logins: []string{username},
KubeGroups: kubeGroups,
KubeUsers: kubeUsers,
},
})
require.NoError(t, err)
teleport.AddUserWithRole(username, role)
err = teleport.CreateEx(t, nil, tconf)
require.NoError(t, err)
err = teleport.Start()
require.NoError(t, err)
defer teleport.StopAll()
// impersonating client requests will be denied if the headers
// are referencing users or groups not allowed by the existing roles
impersonatingProxyClient, impersonatingProxyClientConfig, err := kubeProxyClient(kubeProxyConfig{
t: teleport,
username: username,
kubeUsers: kubeUsers,
kubeGroups: kubeGroups,
impersonation: &rest.ImpersonationConfig{UserName: "bob", Groups: []string{testImpersonationGroup}},
})
require.NoError(t, err)
// try get request to fetch a pod
ctx := context.Background()
_, err = impersonatingProxyClient.CoreV1().Pods(testNamespace).Get(ctx, testPod, metav1.GetOptions{})
require.Error(t, err)
// scoped client requests will be allowed, as long as the impersonation headers
// are referencing users and groups allowed by existing roles
scopedProxyClient, scopedProxyClientConfig, err := kubeProxyClient(kubeProxyConfig{
t: teleport,
username: username,
kubeUsers: kubeUsers,
kubeGroups: kubeGroups,
impersonation: &rest.ImpersonationConfig{
UserName: role.GetKubeUsers(types.Allow)[0],
Groups: role.GetKubeGroups(types.Allow),
},
})
require.NoError(t, err)
_, err = scopedProxyClient.CoreV1().Pods(testNamespace).Get(ctx, testPod, metav1.GetOptions{})
require.NoError(t, err)
// set up kube configuration using proxy
proxyClient, proxyClientConfig, err := kubeProxyClient(kubeProxyConfig{
t: teleport,
username: username,
kubeUsers: kubeUsers,
kubeGroups: kubeGroups,
})
require.NoError(t, err)
// try get request to fetch available pods
pod, err := proxyClient.CoreV1().Pods(testNamespace).Get(ctx, testPod, metav1.GetOptions{})
require.NoError(t, err)
out := &bytes.Buffer{}
err = kubeExec(proxyClientConfig, kubeExecArgs{
podName: pod.Name,
podNamespace: pod.Namespace,
container: pod.Spec.Containers[0].Name,
command: []string{"/bin/cat", "/var/run/secrets/kubernetes.io/serviceaccount/namespace"},
stdout: out,
})
require.NoError(t, err)
data := out.Bytes()
require.Equal(t, testNamespace, string(data))
// interactive command, allocate pty
term := NewTerminal(250)
// lets type "echo hi" followed by "enter" and then "exit" + "enter":
term.Type("\aecho hi\n\r\aexit\n\r\a")
out = &bytes.Buffer{}
err = kubeExec(proxyClientConfig, kubeExecArgs{
podName: pod.Name,
podNamespace: pod.Namespace,
container: pod.Spec.Containers[0].Name,
command: []string{"/bin/sh"},
stdout: out,
tty: true,
stdin: term,
})
require.NoError(t, err)
// verify the session stream output
sessionStream := out.String()
require.Contains(t, sessionStream, "echo hi")
require.Contains(t, sessionStream, "exit")
// verify traffic capture and upload, wait for the upload to hit
var sessionID string
timeoutC := time.After(10 * time.Second)
loop:
for {
select {
case event := <-teleport.UploadEventsC:
sessionID = event.SessionID
break loop
case <-timeoutC:
t.Fatalf("Timeout waiting for upload of session to complete")
}
}
// read back the entire session and verify that it matches the stated output
capturedStream, err := teleport.Process.GetAuthServer().GetSessionChunk(apidefaults.Namespace, session.ID(sessionID), 0, events.MaxChunkBytes)
require.NoError(t, err)
require.Equal(t, sessionStream, string(capturedStream))
// impersonating kube exec should be denied
// interactive command, allocate pty
term = NewTerminal(250)
term.Type("\aecho hi\n\r\aexit\n\r\a")
out = &bytes.Buffer{}
err = kubeExec(impersonatingProxyClientConfig, kubeExecArgs{
podName: pod.Name,
podNamespace: pod.Namespace,
container: pod.Spec.Containers[0].Name,
command: []string{"/bin/sh"},
stdout: out,
tty: true,
stdin: term,
})
require.Error(t, err)
require.Regexp(t, ".*impersonation request has been denied.*", err.Error())
// scoped kube exec is allowed, impersonation headers
// are allowed by the role
term = NewTerminal(250)
term.Type("\aecho hi\n\r\aexit\n\r\a")
out = &bytes.Buffer{}
err = kubeExec(scopedProxyClientConfig, kubeExecArgs{
podName: pod.Name,
podNamespace: pod.Namespace,
container: pod.Spec.Containers[0].Name,
command: []string{"/bin/sh"},
stdout: out,
tty: true,
stdin: term,
})
require.NoError(t, err)
}
// TestKubeDeny makes sure that deny rule conflicting with allow
// rule takes precedence
func testKubeDeny(t *testing.T, suite *KubeSuite) {
tconf := suite.teleKubeConfig(Host)
teleport := NewInstance(InstanceConfig{
ClusterName: Site,
HostID: HostID,
NodeName: Host,
Priv: suite.priv,
Pub: suite.pub,
log: suite.log,
})
username := suite.me.Username
kubeGroups := []string{testImpersonationGroup}
kubeUsers := []string{"[email protected]"}
role, err := types.NewRole("kubemaster", types.RoleSpecV4{
Allow: types.RoleConditions{
Logins: []string{username},
KubeGroups: kubeGroups,
KubeUsers: kubeUsers,
},
Deny: types.RoleConditions{
KubeGroups: kubeGroups,
KubeUsers: kubeUsers,
},
})
require.NoError(t, err)
teleport.AddUserWithRole(username, role)
err = teleport.CreateEx(t, nil, tconf)
require.NoError(t, err)
err = teleport.Start()
require.NoError(t, err)
defer teleport.StopAll()
// set up kube configuration using proxy
proxyClient, _, err := kubeProxyClient(kubeProxyConfig{
t: teleport,
username: username,
kubeUsers: kubeUsers,
kubeGroups: kubeGroups,
})
require.NoError(t, err)
// try get request to fetch available pods
ctx := context.Background()
_, err = proxyClient.CoreV1().Pods(testNamespace).Get(ctx, testPod, metav1.GetOptions{})
require.Error(t, err)
}
// TestKubePortForward tests kubernetes port forwarding
func testKubePortForward(t *testing.T, suite *KubeSuite) {
tconf := suite.teleKubeConfig(Host)
teleport := NewInstance(InstanceConfig{
ClusterName: Site,
HostID: HostID,
NodeName: Host,
Priv: suite.priv,
Pub: suite.pub,
log: suite.log,
})
username := suite.me.Username
kubeGroups := []string{testImpersonationGroup}
role, err := types.NewRole("kubemaster", types.RoleSpecV4{
Allow: types.RoleConditions{
Logins: []string{username},
KubeGroups: kubeGroups,
},
})
require.NoError(t, err)
teleport.AddUserWithRole(username, role)
err = teleport.CreateEx(t, nil, tconf)
require.NoError(t, err)
err = teleport.Start()
require.NoError(t, err)
defer teleport.StopAll()
// set up kube configuration using proxy
_, proxyClientConfig, err := kubeProxyClient(kubeProxyConfig{
t: teleport,
username: username,
kubeGroups: kubeGroups,
})
require.NoError(t, err)
// forward local port to target port 80 of the nginx container
localPort := ports.Pop()
forwarder, err := newPortForwarder(proxyClientConfig, kubePortForwardArgs{
ports: []string{fmt.Sprintf("%v:80", localPort)},
podName: testPod,
podNamespace: testNamespace,
})
require.NoError(t, err)
forwarderCh := make(chan error)
go func() { forwarderCh <- forwarder.ForwardPorts() }()
defer func() {
require.NoError(t, <-forwarderCh, "Forward ports exited with error")
}()
select {
case <-time.After(5 * time.Second):
t.Fatalf("Timeout waiting for port forwarding.")
case <-forwarder.readyC:
}
defer close(forwarder.stopC)
resp, err := http.Get(fmt.Sprintf("http://localhost:%v", localPort))
require.NoError(t, err)
require.Equal(t, http.StatusOK, resp.StatusCode)
require.NoError(t, resp.Body.Close())
// impersonating client requests will be denied
_, impersonatingProxyClientConfig, err := kubeProxyClient(kubeProxyConfig{
t: teleport,
username: username,
kubeGroups: kubeGroups,
impersonation: &rest.ImpersonationConfig{UserName: "bob", Groups: []string{testImpersonationGroup}},
})
require.NoError(t, err)
localPort = ports.Pop()
impersonatingForwarder, err := newPortForwarder(impersonatingProxyClientConfig, kubePortForwardArgs{
ports: []string{fmt.Sprintf("%v:80", localPort)},
podName: testPod,
podNamespace: testNamespace,
})
require.NoError(t, err)
// This request should be denied
err = impersonatingForwarder.ForwardPorts()
require.Error(t, err)
require.Regexp(t, ".*impersonation request has been denied.*", err.Error())
}
// TestKubeTrustedClustersClientCert tests scenario with trusted clusters
// using metadata encoded in the certificate
func testKubeTrustedClustersClientCert(t *testing.T, suite *KubeSuite) {
ctx := context.Background()
clusterMain := "cluster-main"
mainConf := suite.teleKubeConfig(Host)
// Main cluster doesn't need a kubeconfig to forward requests to auxiliary
// cluster.
mainConf.Proxy.Kube.KubeconfigPath = ""
main := NewInstance(InstanceConfig{
ClusterName: clusterMain,
HostID: HostID,
NodeName: Host,
Priv: suite.priv,
Pub: suite.pub,
log: suite.log,
})
// main cluster has a role and user called main-kube
username := suite.me.Username
mainKubeGroups := []string{testImpersonationGroup}
mainRole, err := types.NewRole("main-kube", types.RoleSpecV4{
Allow: types.RoleConditions{
Logins: []string{username},
KubeGroups: mainKubeGroups,
},
})
require.NoError(t, err)
main.AddUserWithRole(username, mainRole)
clusterAux := "cluster-aux"
auxConf := suite.teleKubeConfig(Host)
aux := NewInstance(InstanceConfig{
ClusterName: clusterAux,
HostID: HostID,
NodeName: Host,
Priv: suite.priv,
Pub: suite.pub,
log: suite.log,
})
lib.SetInsecureDevMode(true)
defer lib.SetInsecureDevMode(false)
mainConf.Proxy.Kube.Enabled = true
err = main.CreateEx(t, nil, mainConf)
require.NoError(t, err)
err = aux.CreateEx(t, nil, auxConf)
require.NoError(t, err)
// auxiliary cluster has a role aux-kube
// connect aux cluster to main cluster
// using trusted clusters, so remote user will be allowed to assume
// role specified by mapping remote role "aux-kube" to local role "main-kube"
auxKubeGroups := []string{teleport.TraitInternalKubeGroupsVariable}
auxRole, err := types.NewRole("aux-kube", types.RoleSpecV4{
Allow: types.RoleConditions{
Logins: []string{username},
// Note that main cluster can pass it's kubernetes groups
// to the remote cluster, and remote cluster
// can choose to use them by using special variable
KubeGroups: auxKubeGroups,
},
})
require.NoError(t, err)
err = aux.Process.GetAuthServer().UpsertRole(ctx, auxRole)
require.NoError(t, err)
trustedClusterToken := "trusted-clsuter-token"
err = main.Process.GetAuthServer().UpsertToken(ctx,
services.MustCreateProvisionToken(trustedClusterToken, []types.SystemRole{types.RoleTrustedCluster}, time.Time{}))
require.NoError(t, err)
trustedCluster := main.AsTrustedCluster(trustedClusterToken, types.RoleMap{
{Remote: mainRole.GetName(), Local: []string{auxRole.GetName()}},
})
require.NoError(t, err)
// start both clusters
err = main.Start()
require.NoError(t, err)
defer main.StopAll()
err = aux.Start()
require.NoError(t, err)
defer aux.StopAll()
// try and upsert a trusted cluster
var upsertSuccess bool
for i := 0; i < 10; i++ {
log.Debugf("Will create trusted cluster %v, attempt %v", trustedCluster, i)
_, err = aux.Process.GetAuthServer().UpsertTrustedCluster(ctx, trustedCluster)
if err != nil {
if trace.IsConnectionProblem(err) {
log.Debugf("retrying on connection problem: %v", err)
continue
}
t.Fatalf("got non connection problem %v", err)
}
upsertSuccess = true
break
}
// make sure we upsert a trusted cluster
require.True(t, upsertSuccess)
// Wait for both cluster to see each other via reverse tunnels.
require.Eventually(t, waitForClusters(main.Tunnel, 1), 10*time.Second, 1*time.Second,
"Two clusters do not see each other: tunnels are not working.")
require.Eventually(t, waitForClusters(aux.Tunnel, 1), 10*time.Second, 1*time.Second,
"Two clusters do not see each other: tunnels are not working.")
// impersonating client requests will be denied
impersonatingProxyClient, impersonatingProxyClientConfig, err := kubeProxyClient(kubeProxyConfig{
t: main,
username: username,
kubeGroups: mainKubeGroups,
impersonation: &rest.ImpersonationConfig{UserName: "bob", Groups: []string{testImpersonationGroup}},
routeToCluster: clusterAux,
})
require.NoError(t, err)
// try get request to fetch available pods
_, err = impersonatingProxyClient.CoreV1().Pods(testNamespace).Get(ctx, testPod, metav1.GetOptions{})
require.Error(t, err)
// set up kube configuration using main proxy
proxyClient, proxyClientConfig, err := kubeProxyClient(kubeProxyConfig{
t: main,
username: username,
kubeGroups: mainKubeGroups,
routeToCluster: clusterAux,
})
require.NoError(t, err)
// try get request to fetch available pods
pod, err := proxyClient.CoreV1().Pods(testNamespace).Get(ctx, testPod, metav1.GetOptions{})
require.NoError(t, err)
out := &bytes.Buffer{}
err = kubeExec(proxyClientConfig, kubeExecArgs{
podName: pod.Name,
podNamespace: pod.Namespace,
container: pod.Spec.Containers[0].Name,
command: []string{"/bin/cat", "/var/run/secrets/kubernetes.io/serviceaccount/namespace"},
stdout: out,
})
require.NoError(t, err)
data := out.Bytes()
require.Equal(t, pod.Namespace, string(data))
// interactive command, allocate pty
term := NewTerminal(250)
// lets type "echo hi" followed by "enter" and then "exit" + "enter":
term.Type("\aecho hi\n\r\aexit\n\r\a")
out = &bytes.Buffer{}
err = kubeExec(proxyClientConfig, kubeExecArgs{
podName: pod.Name,
podNamespace: pod.Namespace,
container: pod.Spec.Containers[0].Name,
command: []string{"/bin/sh"},
stdout: out,
tty: true,
stdin: term,
})
require.NoError(t, err)
// verify the session stream output
sessionStream := out.String()
require.Contains(t, sessionStream, "echo hi")
require.Contains(t, sessionStream, "exit")
// verify traffic capture and upload, wait for the upload to hit
var sessionID string
timeoutC := time.After(10 * time.Second)
loop:
for {
select {
case event := <-main.UploadEventsC:
sessionID = event.SessionID
break loop
case <-timeoutC:
t.Fatalf("Timeout waiting for upload of session to complete")
}
}
// read back the entire session and verify that it matches the stated output
capturedStream, err := main.Process.GetAuthServer().GetSessionChunk(apidefaults.Namespace, session.ID(sessionID), 0, events.MaxChunkBytes)
require.NoError(t, err)
require.Equal(t, sessionStream, string(capturedStream))
// impersonating kube exec should be denied
// interactive command, allocate pty
term = NewTerminal(250)
term.Type("\aecho hi\n\r\aexit\n\r\a")
out = &bytes.Buffer{}
err = kubeExec(impersonatingProxyClientConfig, kubeExecArgs{
podName: pod.Name,
podNamespace: pod.Namespace,
container: pod.Spec.Containers[0].Name,
command: []string{"/bin/sh"},
stdout: out,
tty: true,
stdin: term,
})
require.Error(t, err)
require.Regexp(t, ".*impersonation request has been denied.*", err.Error())
// forward local port to target port 80 of the nginx container
localPort := ports.Pop()
forwarder, err := newPortForwarder(proxyClientConfig, kubePortForwardArgs{
ports: []string{fmt.Sprintf("%v:80", localPort)},
podName: pod.Name,
podNamespace: pod.Namespace,
})
require.NoError(t, err)
forwarderCh := make(chan error)
go func() { forwarderCh <- forwarder.ForwardPorts() }()
defer func() {
require.NoError(t, <-forwarderCh, "Forward ports exited with error")
}()
select {
case <-time.After(5 * time.Second):
t.Fatalf("Timeout waiting for port forwarding.")
case <-forwarder.readyC:
}
defer close(forwarder.stopC)
resp, err := http.Get(fmt.Sprintf("http://localhost:%v", localPort))
require.NoError(t, err)
require.Equal(t, http.StatusOK, resp.StatusCode)
require.NoError(t, resp.Body.Close())
// impersonating client requests will be denied
localPort = ports.Pop()
impersonatingForwarder, err := newPortForwarder(impersonatingProxyClientConfig, kubePortForwardArgs{
ports: []string{fmt.Sprintf("%v:80", localPort)},
podName: pod.Name,
podNamespace: pod.Namespace,
})
require.NoError(t, err)
// This request should be denied
err = impersonatingForwarder.ForwardPorts()
require.Error(t, err)
require.Regexp(t, ".*impersonation request has been denied.*", err.Error())
}
// TestKubeTrustedClustersSNI tests scenario with trusted clusters
// using SNI-forwarding
// DELETE IN(4.3.0)
func testKubeTrustedClustersSNI(t *testing.T, suite *KubeSuite) {
ctx := context.Background()
clusterMain := "cluster-main"
mainConf := suite.teleKubeConfig(Host)
main := NewInstance(InstanceConfig{
ClusterName: clusterMain,
HostID: HostID,
NodeName: Host,
Priv: suite.priv,
Pub: suite.pub,
log: suite.log,
})
// main cluster has a role and user called main-kube
username := suite.me.Username
mainKubeGroups := []string{testImpersonationGroup}
mainRole, err := types.NewRole("main-kube", types.RoleSpecV4{
Allow: types.RoleConditions{
Logins: []string{username},
KubeGroups: mainKubeGroups,
},
})
require.NoError(t, err)
main.AddUserWithRole(username, mainRole)
clusterAux := "cluster-aux"
auxConf := suite.teleKubeConfig(Host)
aux := NewInstance(InstanceConfig{
ClusterName: clusterAux,
HostID: HostID,
NodeName: Host,
Priv: suite.priv,
Pub: suite.pub,
log: suite.log,
})
lib.SetInsecureDevMode(true)
defer lib.SetInsecureDevMode(false)
// route all the traffic to the aux cluster
mainConf.Proxy.Kube.Enabled = true
// ClusterOverride forces connection to be routed
// to cluster aux
mainConf.Proxy.Kube.ClusterOverride = clusterAux
err = main.CreateEx(t, nil, mainConf)
require.NoError(t, err)
err = aux.CreateEx(t, nil, auxConf)
require.NoError(t, err)
// auxiliary cluster has a role aux-kube
// connect aux cluster to main cluster
// using trusted clusters, so remote user will be allowed to assume
// role specified by mapping remote role "aux-kube" to local role "main-kube"
auxKubeGroups := []string{teleport.TraitInternalKubeGroupsVariable}
auxRole, err := types.NewRole("aux-kube", types.RoleSpecV4{
Allow: types.RoleConditions{
Logins: []string{username},
// Note that main cluster can pass it's kubernetes groups
// to the remote cluster, and remote cluster
// can choose to use them by using special variable
KubeGroups: auxKubeGroups,
},
})
require.NoError(t, err)
err = aux.Process.GetAuthServer().UpsertRole(ctx, auxRole)
require.NoError(t, err)
trustedClusterToken := "trusted-cluster-token"
err = main.Process.GetAuthServer().UpsertToken(ctx,
services.MustCreateProvisionToken(trustedClusterToken, []types.SystemRole{types.RoleTrustedCluster}, time.Time{}))
require.NoError(t, err)
trustedCluster := main.AsTrustedCluster(trustedClusterToken, types.RoleMap{
{Remote: mainRole.GetName(), Local: []string{auxRole.GetName()}},
})
require.NoError(t, err)
// start both clusters
err = main.Start()
require.NoError(t, err)
defer main.StopAll()
err = aux.Start()
require.NoError(t, err)
defer aux.StopAll()
// try and upsert a trusted cluster
var upsertSuccess bool
for i := 0; i < 10; i++ {
log.Debugf("Will create trusted cluster %v, attempt %v", trustedCluster, i)
_, err = aux.Process.GetAuthServer().UpsertTrustedCluster(ctx, trustedCluster)
if err != nil {
if trace.IsConnectionProblem(err) {
log.Debugf("retrying on connection problem: %v", err)
continue
}
t.Fatalf("got non connection problem %v", err)
}
upsertSuccess = true
break
}
// make sure we upsert a trusted cluster
require.True(t, upsertSuccess)
// Wait for both cluster to see each other via reverse tunnels.
require.Eventually(t, waitForClusters(main.Tunnel, 1), 10*time.Second, 1*time.Second,
"Two clusters do not see each other: tunnels are not working.")
require.Eventually(t, waitForClusters(aux.Tunnel, 1), 10*time.Second, 1*time.Second,
"Two clusters do not see each other: tunnels are not working.")
// impersonating client requests will be denied
impersonatingProxyClient, impersonatingProxyClientConfig, err := kubeProxyClient(kubeProxyConfig{
t: main,
username: username,
kubeGroups: mainKubeGroups,
impersonation: &rest.ImpersonationConfig{UserName: "bob", Groups: []string{testImpersonationGroup}},
})
require.NoError(t, err)
// try get request to fetch available pods
_, err = impersonatingProxyClient.CoreV1().Pods(testNamespace).Get(ctx, testPod, metav1.GetOptions{})
require.Error(t, err)
// set up kube configuration using main proxy
proxyClient, proxyClientConfig, err := kubeProxyClient(kubeProxyConfig{
t: main,
username: username,
kubeGroups: mainKubeGroups,
})
require.NoError(t, err)
// try get request to fetch available pods
pod, err := proxyClient.CoreV1().Pods(testNamespace).Get(ctx, testPod, metav1.GetOptions{})
require.NoError(t, err)
out := &bytes.Buffer{}
err = kubeExec(proxyClientConfig, kubeExecArgs{
podName: pod.Name,
podNamespace: pod.Namespace,
container: pod.Spec.Containers[0].Name,
command: []string{"/bin/cat", "/var/run/secrets/kubernetes.io/serviceaccount/namespace"},
stdout: out,
})
require.NoError(t, err)
data := out.Bytes()
require.Equal(t, pod.Namespace, string(data))
// interactive command, allocate pty
term := NewTerminal(250)
// lets type "echo hi" followed by "enter" and then "exit" + "enter":
term.Type("\aecho hi\n\r\aexit\n\r\a")
out = &bytes.Buffer{}
err = kubeExec(proxyClientConfig, kubeExecArgs{
podName: pod.Name,
podNamespace: pod.Namespace,
container: pod.Spec.Containers[0].Name,
command: []string{"/bin/sh"},
stdout: out,
tty: true,
stdin: term,
})
require.NoError(t, err)
// verify the session stream output
sessionStream := out.String()
require.Contains(t, sessionStream, "echo hi")
require.Contains(t, sessionStream, "exit")
// verify traffic capture and upload, wait for the upload to hit
var sessionID string
timeoutC := time.After(10 * time.Second)
loop:
for {
select {
case event := <-main.UploadEventsC:
sessionID = event.SessionID
break loop
case <-timeoutC:
t.Fatalf("Timeout waiting for upload of session to complete")
}
}
// read back the entire session and verify that it matches the stated output
capturedStream, err := main.Process.GetAuthServer().GetSessionChunk(apidefaults.Namespace, session.ID(sessionID), 0, events.MaxChunkBytes)
require.NoError(t, err)
require.Equal(t, sessionStream, string(capturedStream))
// impersonating kube exec should be denied
// interactive command, allocate pty
term = NewTerminal(250)
term.Type("\aecho hi\n\r\aexit\n\r\a")
out = &bytes.Buffer{}
err = kubeExec(impersonatingProxyClientConfig, kubeExecArgs{
podName: pod.Name,
podNamespace: pod.Namespace,
container: pod.Spec.Containers[0].Name,
command: []string{"/bin/sh"},
stdout: out,
tty: true,
stdin: term,
})
require.Error(t, err)
require.Regexp(t, ".*impersonation request has been denied.*", err.Error())
// forward local port to target port 80 of the nginx container
localPort := ports.Pop()
forwarder, err := newPortForwarder(proxyClientConfig, kubePortForwardArgs{
ports: []string{fmt.Sprintf("%v:80", localPort)},
podName: pod.Name,
podNamespace: pod.Namespace,
})
require.NoError(t, err)
forwarderCh := make(chan error)
go func() { forwarderCh <- forwarder.ForwardPorts() }()
defer func() {
require.NoError(t, <-forwarderCh, "Forward ports exited with error")
}()
select {
case <-time.After(5 * time.Second):
t.Fatalf("Timeout waiting for port forwarding.")
case <-forwarder.readyC:
}
defer close(forwarder.stopC)
resp, err := http.Get(fmt.Sprintf("http://localhost:%v", localPort))
require.NoError(t, err)
require.Equal(t, http.StatusOK, resp.StatusCode)
require.NoError(t, resp.Body.Close())
// impersonating client requests will be denied
localPort = ports.Pop()
impersonatingForwarder, err := newPortForwarder(impersonatingProxyClientConfig, kubePortForwardArgs{
ports: []string{fmt.Sprintf("%v:80", localPort)},
podName: pod.Name,
podNamespace: pod.Namespace,
})
require.NoError(t, err)
// This request should be denied
err = impersonatingForwarder.ForwardPorts()
require.Error(t, err)
require.Regexp(t, ".*impersonation request has been denied.*", err.Error())
}
// TestKubeDisconnect tests kubernetes session disconnects
func testKubeDisconnect(t *testing.T, suite *KubeSuite) {
testCases := []disconnectTestCase{
{
options: types.RoleOptions{
ClientIdleTimeout: types.NewDuration(500 * time.Millisecond),
},
disconnectTimeout: 2 * time.Second,
},
{
options: types.RoleOptions{
DisconnectExpiredCert: types.NewBool(true),
MaxSessionTTL: types.NewDuration(3 * time.Second),
},
disconnectTimeout: 6 * time.Second,
},
}
for i := 0; i < utils.GetIterations(); i++ {
for j, tc := range testCases {