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main_test.go
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// Copyright 2020 Google LLC
//
// 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 main
import (
"context"
"math/rand"
"net"
"net/http"
"net/http/httptest"
"regexp"
"strings"
"testing"
"github.com/google/go-cmp/cmp"
"github.com/google/uuid"
)
func TestGetGitCommitId(t *testing.T) {
commitId, err := getGitCommitId()
if err != nil {
t.Fatal(err)
}
re := regexp.MustCompile(`^[a-f0-9]{40}$`)
if !re.MatchString(commitId) {
t.Fatalf("getGitCommitId(): returned an invalid commit ID: %q. Want commit ID to be a valid SHA1 hash.", commitId)
}
}
func TestValidate(t *testing.T) {
tests := []struct {
desc string
input configInput
wantError string
}{
{
desc: "fails when config-mesh has too many characters",
input: configInput{
xdsServerUri: "example.com:443",
gcpProjectNumber: 123456789012345,
vpcNetworkName: "thedefault",
ip: "10.9.8.7",
zone: "uscentral-5",
metadataLabels: map[string]string{"k1": "v1", "k2": "v2"},
configMesh: strings.Repeat("a", 65),
},
wantError: "config-mesh may only contain letters, numbers, and '-'. It must begin with a letter and must not exceed 64 characters in length",
},
{
desc: "fails when config-mesh does not start with an alphabetic letter",
input: configInput{
xdsServerUri: "example.com:443",
gcpProjectNumber: 123456789012345,
vpcNetworkName: "thedefault",
ip: "10.9.8.7",
zone: "uscentral-5",
metadataLabels: map[string]string{"k1": "v1", "k2": "v2"},
configMesh: "4foo",
},
wantError: "config-mesh may only contain letters, numbers, and '-'. It must begin with a letter and must not exceed 64 characters in length",
},
{
desc: "fails when config-mesh contains characters besides letters, numbers, and hyphens.",
input: configInput{
xdsServerUri: "example.com:443",
gcpProjectNumber: 123456789012345,
vpcNetworkName: "thedefault",
ip: "10.9.8.7",
zone: "uscentral-5",
metadataLabels: map[string]string{"k1": "v1", "k2": "v2"},
configMesh: "h*x8",
},
wantError: "config-mesh may only contain letters, numbers, and '-'. It must begin with a letter and must not exceed 64 characters in length",
},
}
for _, test := range tests {
t.Run(test.desc, func(t *testing.T) {
err := validate(test.input)
if test.wantError != err.Error() {
t.Fatalf("validate(%+v) returned output does not match expected:\nGot: \"%v\"\nWant: \"%s\"", test.input, err.Error(), test.wantError)
}
})
}
}
func TestGenerate(t *testing.T) {
tests := []struct {
desc string
input configInput
wantOutput string
}{
{
desc: "happy case with v3 config by default",
input: configInput{
xdsServerUri: "example.com:443",
gcpProjectNumber: 123456789012345,
vpcNetworkName: "thedefault",
ip: "10.9.8.7",
zone: "uscentral-5",
metadataLabels: map[string]string{"k1": "v1", "k2": "v2"},
gitCommitHash: "7202b7c611ebd6d382b7b0240f50e9824200bffd",
},
wantOutput: `{
"xds_servers": [
{
"server_uri": "example.com:443",
"channel_creds": [
{
"type": "google_default"
}
],
"server_features": [
"xds_v3"
]
}
],
"authorities": {
"traffic-director-c2p.xds.googleapis.com": {
"xds_servers": [
{
"server_uri": "dns:///directpath-pa.googleapis.com",
"channel_creds": [
{
"type": "google_default"
}
],
"server_features": [
"xds_v3",
"ignore_resource_deletion"
]
}
],
"client_listener_resource_name_template": "xdstp://traffic-director-c2p.xds.googleapis.com/envoy.config.listener.v3.Listener/%s"
},
"traffic-director-global.xds.googleapis.com": {
"client_listener_resource_name_template": "xdstp://traffic-director-global.xds.googleapis.com/envoy.config.listener.v3.Listener/123456789012345/thedefault/%s"
}
},
"node": {
"id": "projects/123456789012345/networks/thedefault/nodes/52fdfc07-2182-454f-963f-5f0f9a621d72",
"cluster": "cluster",
"metadata": {
"INSTANCE_IP": "10.9.8.7",
"TRAFFICDIRECTOR_GRPC_BOOTSTRAP_GENERATOR_SHA": "7202b7c611ebd6d382b7b0240f50e9824200bffd",
"k1": "v1",
"k2": "v2"
},
"locality": {
"zone": "uscentral-5"
}
},
"certificate_providers": {
"google_cloud_private_spiffe": {
"plugin_name": "file_watcher",
"config": {
"certificate_file": "certificates.pem",
"private_key_file": "private_key.pem",
"ca_certificate_file": "ca_certificates.pem",
"refresh_interval": "600s"
}
}
},
"server_listener_resource_name_template": "grpc/server?xds.resource.listening_address=%s",
"client_default_listener_resource_name_template": "xdstp://traffic-director-global.xds.googleapis.com/envoy.config.listener.v3.Listener/123456789012345/thedefault/%s"
}`,
},
{
desc: "Server feature for Trusted xds server",
input: configInput{
xdsServerUri: "example.com:443",
gcpProjectNumber: 123456789012345,
vpcNetworkName: "thedefault",
ip: "10.9.8.7",
zone: "uscentral-5",
metadataLabels: map[string]string{"k1": "v1", "k2": "v2"},
gitCommitHash: "7202b7c611ebd6d382b7b0240f50e9824200bffd",
isTrustedXdsServer: true,
},
wantOutput: `{
"xds_servers": [
{
"server_uri": "example.com:443",
"channel_creds": [
{
"type": "google_default"
}
],
"server_features": [
"xds_v3",
"trusted_xds_server"
]
}
],
"authorities": {
"traffic-director-c2p.xds.googleapis.com": {
"xds_servers": [
{
"server_uri": "dns:///directpath-pa.googleapis.com",
"channel_creds": [
{
"type": "google_default"
}
],
"server_features": [
"xds_v3",
"ignore_resource_deletion"
]
}
],
"client_listener_resource_name_template": "xdstp://traffic-director-c2p.xds.googleapis.com/envoy.config.listener.v3.Listener/%s"
},
"traffic-director-global.xds.googleapis.com": {
"client_listener_resource_name_template": "xdstp://traffic-director-global.xds.googleapis.com/envoy.config.listener.v3.Listener/123456789012345/thedefault/%s"
}
},
"node": {
"id": "projects/123456789012345/networks/thedefault/nodes/52fdfc07-2182-454f-963f-5f0f9a621d72",
"cluster": "cluster",
"metadata": {
"INSTANCE_IP": "10.9.8.7",
"TRAFFICDIRECTOR_GRPC_BOOTSTRAP_GENERATOR_SHA": "7202b7c611ebd6d382b7b0240f50e9824200bffd",
"k1": "v1",
"k2": "v2"
},
"locality": {
"zone": "uscentral-5"
}
},
"certificate_providers": {
"google_cloud_private_spiffe": {
"plugin_name": "file_watcher",
"config": {
"certificate_file": "certificates.pem",
"private_key_file": "private_key.pem",
"ca_certificate_file": "ca_certificates.pem",
"refresh_interval": "600s"
}
}
},
"server_listener_resource_name_template": "grpc/server?xds.resource.listening_address=%s",
"client_default_listener_resource_name_template": "xdstp://traffic-director-global.xds.googleapis.com/envoy.config.listener.v3.Listener/123456789012345/thedefault/%s"
}`,
},
{
desc: "happy case with security config",
input: configInput{
xdsServerUri: "example.com:443",
gcpProjectNumber: 123456789012345,
vpcNetworkName: "thedefault",
ip: "10.9.8.7",
zone: "uscentral-5",
secretsDir: "/secrets/dir/",
gitCommitHash: "7202b7c611ebd6d382b7b0240f50e9824200bffd",
},
wantOutput: `{
"xds_servers": [
{
"server_uri": "example.com:443",
"channel_creds": [
{
"type": "google_default"
}
],
"server_features": [
"xds_v3"
]
}
],
"authorities": {
"traffic-director-c2p.xds.googleapis.com": {
"xds_servers": [
{
"server_uri": "dns:///directpath-pa.googleapis.com",
"channel_creds": [
{
"type": "google_default"
}
],
"server_features": [
"xds_v3",
"ignore_resource_deletion"
]
}
],
"client_listener_resource_name_template": "xdstp://traffic-director-c2p.xds.googleapis.com/envoy.config.listener.v3.Listener/%s"
},
"traffic-director-global.xds.googleapis.com": {
"client_listener_resource_name_template": "xdstp://traffic-director-global.xds.googleapis.com/envoy.config.listener.v3.Listener/123456789012345/thedefault/%s"
}
},
"node": {
"id": "projects/123456789012345/networks/thedefault/nodes/52fdfc07-2182-454f-963f-5f0f9a621d72",
"cluster": "cluster",
"metadata": {
"INSTANCE_IP": "10.9.8.7",
"TRAFFICDIRECTOR_GRPC_BOOTSTRAP_GENERATOR_SHA": "7202b7c611ebd6d382b7b0240f50e9824200bffd"
},
"locality": {
"zone": "uscentral-5"
}
},
"certificate_providers": {
"google_cloud_private_spiffe": {
"plugin_name": "file_watcher",
"config": {
"certificate_file": "/secrets/dir/certificates.pem",
"private_key_file": "/secrets/dir/private_key.pem",
"ca_certificate_file": "/secrets/dir/ca_certificates.pem",
"refresh_interval": "600s"
}
}
},
"server_listener_resource_name_template": "grpc/server?xds.resource.listening_address=%s",
"client_default_listener_resource_name_template": "xdstp://traffic-director-global.xds.googleapis.com/envoy.config.listener.v3.Listener/123456789012345/thedefault/%s"
}`,
},
{
desc: "happy case with deployment info",
input: configInput{
xdsServerUri: "example.com:443",
gcpProjectNumber: 123456789012345,
vpcNetworkName: "thedefault",
ip: "10.9.8.7",
zone: "uscentral-5",
deploymentInfo: map[string]string{
"GCP-ZONE": "uscentral-5",
"GKE-CLUSTER": "test-gke-cluster",
"GKE-NAMESPACE": "test-gke-namespace",
"GKE-POD": "test-gke-pod",
"INSTANCE-IP": "10.9.8.7",
"GCE-VM": "test-gce-vm",
},
gitCommitHash: "7202b7c611ebd6d382b7b0240f50e9824200bffd",
},
wantOutput: `{
"xds_servers": [
{
"server_uri": "example.com:443",
"channel_creds": [
{
"type": "google_default"
}
],
"server_features": [
"xds_v3"
]
}
],
"authorities": {
"traffic-director-c2p.xds.googleapis.com": {
"xds_servers": [
{
"server_uri": "dns:///directpath-pa.googleapis.com",
"channel_creds": [
{
"type": "google_default"
}
],
"server_features": [
"xds_v3",
"ignore_resource_deletion"
]
}
],
"client_listener_resource_name_template": "xdstp://traffic-director-c2p.xds.googleapis.com/envoy.config.listener.v3.Listener/%s"
},
"traffic-director-global.xds.googleapis.com": {
"client_listener_resource_name_template": "xdstp://traffic-director-global.xds.googleapis.com/envoy.config.listener.v3.Listener/123456789012345/thedefault/%s"
}
},
"node": {
"id": "projects/123456789012345/networks/thedefault/nodes/52fdfc07-2182-454f-963f-5f0f9a621d72",
"cluster": "cluster",
"metadata": {
"INSTANCE_IP": "10.9.8.7",
"TRAFFICDIRECTOR_GRPC_BOOTSTRAP_GENERATOR_SHA": "7202b7c611ebd6d382b7b0240f50e9824200bffd",
"TRAFFIC_DIRECTOR_CLIENT_ENVIRONMENT": {
"GCE-VM": "test-gce-vm",
"GCP-ZONE": "uscentral-5",
"GKE-CLUSTER": "test-gke-cluster",
"GKE-NAMESPACE": "test-gke-namespace",
"GKE-POD": "test-gke-pod",
"INSTANCE-IP": "10.9.8.7"
}
},
"locality": {
"zone": "uscentral-5"
}
},
"certificate_providers": {
"google_cloud_private_spiffe": {
"plugin_name": "file_watcher",
"config": {
"certificate_file": "certificates.pem",
"private_key_file": "private_key.pem",
"ca_certificate_file": "ca_certificates.pem",
"refresh_interval": "600s"
}
}
},
"server_listener_resource_name_template": "grpc/server?xds.resource.listening_address=%s",
"client_default_listener_resource_name_template": "xdstp://traffic-director-global.xds.googleapis.com/envoy.config.listener.v3.Listener/123456789012345/thedefault/%s"
}`,
},
{
desc: "configMesh specified",
input: configInput{
xdsServerUri: "example.com:443",
gcpProjectNumber: 123456789012345,
vpcNetworkName: "thedefault",
ip: "10.9.8.7",
zone: "uscentral-5",
deploymentInfo: map[string]string{
"GCP-ZONE": "uscentral-5",
"GKE-CLUSTER": "test-gke-cluster",
"GKE-NAMESPACE": "test-gke-namespace",
"GKE-POD": "test-gke-pod",
"INSTANCE-IP": "10.9.8.7",
"GCE-VM": "test-gce-vm",
},
configMesh: "testmesh",
gitCommitHash: "7202b7c611ebd6d382b7b0240f50e9824200bffd",
},
wantOutput: `{
"xds_servers": [
{
"server_uri": "example.com:443",
"channel_creds": [
{
"type": "google_default"
}
],
"server_features": [
"xds_v3"
]
}
],
"authorities": {
"traffic-director-c2p.xds.googleapis.com": {
"xds_servers": [
{
"server_uri": "dns:///directpath-pa.googleapis.com",
"channel_creds": [
{
"type": "google_default"
}
],
"server_features": [
"xds_v3",
"ignore_resource_deletion"
]
}
],
"client_listener_resource_name_template": "xdstp://traffic-director-c2p.xds.googleapis.com/envoy.config.listener.v3.Listener/%s"
},
"traffic-director-global.xds.googleapis.com": {
"client_listener_resource_name_template": "xdstp://traffic-director-global.xds.googleapis.com/envoy.config.listener.v3.Listener/123456789012345/mesh:testmesh/%s"
}
},
"node": {
"id": "projects/123456789012345/networks/mesh:testmesh/nodes/52fdfc07-2182-454f-963f-5f0f9a621d72",
"cluster": "cluster",
"metadata": {
"INSTANCE_IP": "10.9.8.7",
"TRAFFICDIRECTOR_GRPC_BOOTSTRAP_GENERATOR_SHA": "7202b7c611ebd6d382b7b0240f50e9824200bffd",
"TRAFFIC_DIRECTOR_CLIENT_ENVIRONMENT": {
"GCE-VM": "test-gce-vm",
"GCP-ZONE": "uscentral-5",
"GKE-CLUSTER": "test-gke-cluster",
"GKE-NAMESPACE": "test-gke-namespace",
"GKE-POD": "test-gke-pod",
"INSTANCE-IP": "10.9.8.7"
}
},
"locality": {
"zone": "uscentral-5"
}
},
"certificate_providers": {
"google_cloud_private_spiffe": {
"plugin_name": "file_watcher",
"config": {
"certificate_file": "certificates.pem",
"private_key_file": "private_key.pem",
"ca_certificate_file": "ca_certificates.pem",
"refresh_interval": "600s"
}
}
},
"server_listener_resource_name_template": "grpc/server?xds.resource.listening_address=%s",
"client_default_listener_resource_name_template": "xdstp://traffic-director-global.xds.googleapis.com/envoy.config.listener.v3.Listener/123456789012345/mesh:testmesh/%s"
}`,
},
{
desc: "ignore_resource_deletion and v3",
input: configInput{
xdsServerUri: "example.com:443",
gcpProjectNumber: 123456789012345,
vpcNetworkName: "thedefault",
ip: "10.9.8.7",
zone: "uscentral-5",
ignoreResourceDeletion: true,
gitCommitHash: "7202b7c611ebd6d382b7b0240f50e9824200bffd",
},
wantOutput: `{
"xds_servers": [
{
"server_uri": "example.com:443",
"channel_creds": [
{
"type": "google_default"
}
],
"server_features": [
"xds_v3",
"ignore_resource_deletion"
]
}
],
"authorities": {
"traffic-director-c2p.xds.googleapis.com": {
"xds_servers": [
{
"server_uri": "dns:///directpath-pa.googleapis.com",
"channel_creds": [
{
"type": "google_default"
}
],
"server_features": [
"xds_v3",
"ignore_resource_deletion"
]
}
],
"client_listener_resource_name_template": "xdstp://traffic-director-c2p.xds.googleapis.com/envoy.config.listener.v3.Listener/%s"
},
"traffic-director-global.xds.googleapis.com": {
"client_listener_resource_name_template": "xdstp://traffic-director-global.xds.googleapis.com/envoy.config.listener.v3.Listener/123456789012345/thedefault/%s"
}
},
"node": {
"id": "projects/123456789012345/networks/thedefault/nodes/52fdfc07-2182-454f-963f-5f0f9a621d72",
"cluster": "cluster",
"metadata": {
"INSTANCE_IP": "10.9.8.7",
"TRAFFICDIRECTOR_GRPC_BOOTSTRAP_GENERATOR_SHA": "7202b7c611ebd6d382b7b0240f50e9824200bffd"
},
"locality": {
"zone": "uscentral-5"
}
},
"certificate_providers": {
"google_cloud_private_spiffe": {
"plugin_name": "file_watcher",
"config": {
"certificate_file": "certificates.pem",
"private_key_file": "private_key.pem",
"ca_certificate_file": "ca_certificates.pem",
"refresh_interval": "600s"
}
}
},
"server_listener_resource_name_template": "grpc/server?xds.resource.listening_address=%s",
"client_default_listener_resource_name_template": "xdstp://traffic-director-global.xds.googleapis.com/envoy.config.listener.v3.Listener/123456789012345/thedefault/%s"
}`,
},
}
for _, test := range tests {
t.Run(test.desc, func(t *testing.T) {
uuid.SetRand(rand.New(rand.NewSource(1)))
gotOutput, err := generate(test.input)
if err != nil {
t.Fatalf("generate(%+v) failed: %v", test.input, err)
}
if diff := cmp.Diff(test.wantOutput, string(gotOutput)); diff != "" {
t.Fatalf("generate(%+v) returned output does not match expected (-want +got):\n%s", test.input, diff)
}
})
}
}
func TestGetZone(t *testing.T) {
server := httptest.NewServer(nil)
defer server.Close()
overrideHTTP(server)
want := "us-central5-c"
http.HandleFunc("metadata.google.internal/computeMetadata/v1/instance/zone",
func(w http.ResponseWriter, r *http.Request) {
if r.Header.Get("Metadata-Flavor") != "Google" {
http.Error(w, "Missing Metadata-Flavor", 403)
return
}
w.Write([]byte("projects/123456789012345/zones/us-central5-c"))
})
got, err := getZone()
if err != nil {
t.Fatalf("want no error, got :%v", err)
}
if want != got {
t.Fatalf("want %v, got: %v", want, got)
}
}
func TestGetProjectId(t *testing.T) {
server := httptest.NewServer(nil)
defer server.Close()
overrideHTTP(server)
want := int64(123456789012345)
http.HandleFunc("metadata.google.internal/computeMetadata/v1/project/numeric-project-id",
func(w http.ResponseWriter, r *http.Request) {
if r.Header.Get("Metadata-Flavor") != "Google" {
http.Error(w, "Missing Metadata-Flavor", 403)
return
}
w.Write([]byte("123456789012345"))
})
got, err := getProjectId()
if err != nil {
t.Fatalf("want no error, got :%v", err)
}
if want != got {
t.Fatalf("want %v, got: %v", want, got)
}
}
func TestGetClusterName(t *testing.T) {
server := httptest.NewServer(nil)
defer server.Close()
overrideHTTP(server)
want := "test-cluster"
http.HandleFunc("metadata.google.internal/computeMetadata/v1/instance/attributes/cluster-name",
func(w http.ResponseWriter, r *http.Request) {
if r.Header.Get("Metadata-Flavor") != "Google" {
http.Error(w, "Missing Metadata-Flavor", 403)
return
}
w.Write([]byte("test-cluster"))
})
if got, _ := getClusterName(); got != want {
t.Fatalf("getClusterName() = %s, want: %s", got, want)
}
}
func TestGetClusterLocality(t *testing.T) {
tests := []struct {
desc string
handler func(http.ResponseWriter, *http.Request)
want string
wantErr bool
}{
{
desc: "zonal_succeess",
handler: func(w http.ResponseWriter, r *http.Request) {
if r.Header.Get("Metadata-Flavor") != "Google" {
http.Error(w, "Missing Metadata-Flavor", http.StatusForbidden)
return
}
w.Write([]byte("us-west1-a"))
},
want: "us-west1-a",
},
{
desc: "regional_succeess",
handler: func(w http.ResponseWriter, r *http.Request) {
if r.Header.Get("Metadata-Flavor") != "Google" {
http.Error(w, "Missing Metadata-Flavor", http.StatusForbidden)
return
}
w.Write([]byte("us-west1"))
},
want: "us-west1",
},
{
desc: "no_response_from_server",
handler: func(w http.ResponseWriter, r *http.Request) {
http.Error(w, "Error", http.StatusForbidden)
},
wantErr: true,
},
}
for _, tt := range tests {
t.Run(tt.desc, func(t *testing.T) {
mux := http.NewServeMux()
mux.HandleFunc("metadata.google.internal/computeMetadata/v1/instance/attributes/cluster-location", tt.handler)
server := httptest.NewServer(mux)
defer server.Close()
overrideHTTP(server)
got, err := getClusterLocality()
if (err != nil) != tt.wantErr {
t.Fatalf("getClusterLocality() returned error: %s wantErr: %v", err, tt.wantErr)
}
if got != tt.want {
t.Fatalf("getClusterLocality() = %s want: %s", got, tt.want)
}
})
}
}
func TestGetVMName(t *testing.T) {
server := httptest.NewServer(nil)
defer server.Close()
overrideHTTP(server)
want := "test-vm"
http.HandleFunc("metadata.google.internal/computeMetadata/v1/instance/name",
func(w http.ResponseWriter, r *http.Request) {
if r.Header.Get("Metadata-Flavor") != "Google" {
http.Error(w, "Missing Metadata-Flavor", 403)
return
}
w.Write([]byte("test-vm"))
})
if got := getVMName(); got != want {
t.Fatalf("getVMName() = %s, want: %s", got, want)
}
}
func TestCheckIPv6Capable(t *testing.T) {
tests := []struct {
desc string
httpHandler func(http.ResponseWriter, *http.Request)
wantOutput bool
}{
{
desc: "v6 enabled",
httpHandler: func(w http.ResponseWriter, r *http.Request) {
if r.Header.Get("Metadata-Flavor") != "Google" {
http.Error(w, "Missing Metadata-Flavor", 403)
return
}
w.Write([]byte("6970:7636:2061:6464:7265:7373:2062:6162"))
},
wantOutput: true,
},
{
desc: "v6 not enabled",
httpHandler: func(w http.ResponseWriter, r *http.Request) {
http.Error(w, "Not Found", 404)
return
},
wantOutput: false,
},
}
for _, test := range tests {
t.Run(test.desc, func(t *testing.T) {
mux := http.NewServeMux()
mux.HandleFunc("metadata.google.internal/computeMetadata/v1/instance/network-interfaces/0/ipv6s", test.httpHandler)
server := httptest.NewServer(mux)
defer server.Close()
overrideHTTP(server)
if got := isIPv6Capable(); got != test.wantOutput {
t.Fatalf("isIPv6Capable() = %t, want: %t", got, test.wantOutput)
}
})
}
}
func overrideHTTP(s *httptest.Server) {
http.DefaultTransport = &http.Transport{
DialContext: func(ctx context.Context, network, addr string) (net.Conn, error) {
return (&net.Dialer{}).DialContext(ctx, "tcp", s.Listener.Addr().String())
},
}
}