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consul/command/connect/envoy/envoy_test.go

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package envoy
import (
"encoding/json"
"flag"
"io/ioutil"
"net/http"
"net/http/httptest"
"os"
"path/filepath"
"strings"
"testing"
"github.com/hashicorp/consul/agent/xds"
"github.com/hashicorp/consul/api"
"github.com/hashicorp/consul/sdk/testutil"
"github.com/mitchellh/cli"
"github.com/stretchr/testify/require"
)
var update = flag.Bool("update", false, "update golden files")
func TestCatalogCommand_noTabs(t *testing.T) {
t.Parallel()
if strings.ContainsRune(New(nil).Help(), '\t') {
t.Fatal("help has tabs")
}
}
// testSetAndResetEnv sets the env vars passed as KEY=value strings in the
// current ENV and returns a func() that will undo it's work at the end of the
// test for use with defer.
func testSetAndResetEnv(t *testing.T, env []string) func() {
old := make(map[string]*string)
for _, e := range env {
pair := strings.SplitN(e, "=", 2)
current := os.Getenv(pair[0])
if current != "" {
old[pair[0]] = &current
} else {
// save it as a nil so we know to remove again
old[pair[0]] = nil
}
os.Setenv(pair[0], pair[1])
}
// Return a func that will reset to old values
return func() {
for k, v := range old {
if v == nil {
os.Unsetenv(k)
} else {
os.Setenv(k, *v)
}
}
}
}
// This tests the args we use to generate the template directly because they
// encapsulate all the argument and default handling code which is where most of
// the logic is. We also allow generating golden files but only for cases that
// pass the test of having their template args generated as expected.
func TestGenerateConfig(t *testing.T) {
cases := []struct {
Name string
Flags []string
Env []string
Files map[string]string
ProxyConfig map[string]interface{}
WantArgs BootstrapTplArgs
WantErr string
}{
{
Name: "no-args",
Flags: []string{},
Env: []string{},
WantErr: "No proxy ID specified",
},
{
Name: "defaults",
Flags: []string{"-proxy-id", "test-proxy"},
Env: []string{},
WantArgs: BootstrapTplArgs{
ProxyCluster: "test-proxy",
ProxyID: "test-proxy",
AgentAddress: "127.0.0.1",
AgentPort: "8502", // Note this is the gRPC port
AdminBindAddress: "127.0.0.1",
AdminBindPort: "19000",
LocalAgentClusterName: xds.LocalAgentClusterName,
},
},
{
Name: "token-arg",
Flags: []string{"-proxy-id", "test-proxy",
"-token", "c9a52720-bf6c-4aa6-b8bc-66881a5ade95"},
Env: []string{},
WantArgs: BootstrapTplArgs{
ProxyCluster: "test-proxy",
ProxyID: "test-proxy",
AgentAddress: "127.0.0.1",
AgentPort: "8502", // Note this is the gRPC port
AdminBindAddress: "127.0.0.1",
AdminBindPort: "19000",
LocalAgentClusterName: xds.LocalAgentClusterName,
Token: "c9a52720-bf6c-4aa6-b8bc-66881a5ade95",
},
},
{
Name: "token-env",
Flags: []string{"-proxy-id", "test-proxy"},
Env: []string{
"CONSUL_HTTP_TOKEN=c9a52720-bf6c-4aa6-b8bc-66881a5ade95",
},
WantArgs: BootstrapTplArgs{
ProxyCluster: "test-proxy",
ProxyID: "test-proxy",
AgentAddress: "127.0.0.1",
AgentPort: "8502", // Note this is the gRPC port
AdminBindAddress: "127.0.0.1",
AdminBindPort: "19000",
LocalAgentClusterName: xds.LocalAgentClusterName,
Token: "c9a52720-bf6c-4aa6-b8bc-66881a5ade95",
},
},
{
Name: "token-file-arg",
Flags: []string{"-proxy-id", "test-proxy",
"-token-file", "@@TEMPDIR@@token.txt",
},
Env: []string{},
Files: map[string]string{
"token.txt": "c9a52720-bf6c-4aa6-b8bc-66881a5ade95",
},
WantArgs: BootstrapTplArgs{
ProxyCluster: "test-proxy",
ProxyID: "test-proxy",
AgentAddress: "127.0.0.1",
AgentPort: "8502", // Note this is the gRPC port
AdminBindAddress: "127.0.0.1",
AdminBindPort: "19000",
LocalAgentClusterName: xds.LocalAgentClusterName,
Token: "c9a52720-bf6c-4aa6-b8bc-66881a5ade95",
},
},
{
Name: "token-file-env",
Flags: []string{"-proxy-id", "test-proxy"},
Env: []string{
"CONSUL_HTTP_TOKEN_FILE=@@TEMPDIR@@token.txt",
},
Files: map[string]string{
"token.txt": "c9a52720-bf6c-4aa6-b8bc-66881a5ade95",
},
WantArgs: BootstrapTplArgs{
ProxyCluster: "test-proxy",
ProxyID: "test-proxy",
AgentAddress: "127.0.0.1",
AgentPort: "8502", // Note this is the gRPC port
AdminBindAddress: "127.0.0.1",
AdminBindPort: "19000",
LocalAgentClusterName: xds.LocalAgentClusterName,
Token: "c9a52720-bf6c-4aa6-b8bc-66881a5ade95",
},
},
{
Name: "grpc-addr-flag",
Flags: []string{"-proxy-id", "test-proxy",
"-grpc-addr", "localhost:9999"},
Env: []string{},
WantArgs: BootstrapTplArgs{
ProxyCluster: "test-proxy",
ProxyID: "test-proxy",
// Should resolve IP, note this might not resolve the same way
// everywhere which might make this test brittle but not sure what else
// to do.
AgentAddress: "127.0.0.1",
AgentPort: "9999",
AdminBindAddress: "127.0.0.1",
AdminBindPort: "19000",
LocalAgentClusterName: xds.LocalAgentClusterName,
},
},
{
Name: "grpc-addr-env",
Flags: []string{"-proxy-id", "test-proxy"},
Env: []string{
"CONSUL_GRPC_ADDR=localhost:9999",
},
WantArgs: BootstrapTplArgs{
ProxyCluster: "test-proxy",
ProxyID: "test-proxy",
// Should resolve IP, note this might not resolve the same way
// everywhere which might make this test brittle but not sure what else
// to do.
AgentAddress: "127.0.0.1",
AgentPort: "9999",
AdminBindAddress: "127.0.0.1",
AdminBindPort: "19000",
LocalAgentClusterName: xds.LocalAgentClusterName,
},
},
{
Name: "custom-bootstrap",
Flags: []string{"-proxy-id", "test-proxy"},
Env: []string{},
ProxyConfig: map[string]interface{}{
// Add a completely custom bootstrap template. Never mind if this is
// invalid envoy config just as long as it works and gets the variables
// interplated.
"envoy_bootstrap_json_tpl": `
{
"admin": {
"access_log_path": "/dev/null",
"address": {
"socket_address": {
"address": "{{ .AdminBindAddress }}",
"port_value": {{ .AdminBindPort }}
}
}
},
"node": {
"cluster": "{{ .ProxyCluster }}",
"id": "{{ .ProxyID }}"
},
custom_field = "foo"
}`,
},
WantArgs: BootstrapTplArgs{
ProxyCluster: "test-proxy",
ProxyID: "test-proxy",
AgentAddress: "127.0.0.1",
AgentPort: "8502",
AdminBindAddress: "127.0.0.1",
AdminBindPort: "19000",
LocalAgentClusterName: xds.LocalAgentClusterName,
},
},
{
Name: "extra_-single",
Flags: []string{"-proxy-id", "test-proxy"},
Env: []string{},
ProxyConfig: map[string]interface{}{
// Add a custom sections with interpolated variables. These are all
// invalid config syntax too but we are just testing they have the right
// effect.
"envoy_extra_static_clusters_json": `
{
"name": "fake_cluster_1"
}`,
"envoy_extra_static_listeners_json": `
{
"name": "fake_listener_1"
}`,
"envoy_extra_stats_sinks_json": `
{
"name": "fake_sink_1"
}`,
},
WantArgs: BootstrapTplArgs{
ProxyCluster: "test-proxy",
ProxyID: "test-proxy",
AgentAddress: "127.0.0.1",
AgentPort: "8502",
AdminBindAddress: "127.0.0.1",
AdminBindPort: "19000",
LocalAgentClusterName: xds.LocalAgentClusterName,
},
},
{
Name: "extra_-multiple",
Flags: []string{"-proxy-id", "test-proxy"},
Env: []string{},
ProxyConfig: map[string]interface{}{
// Add a custom sections with interpolated variables. These are all
// invalid config syntax too but we are just testing they have the right
// effect.
"envoy_extra_static_clusters_json": `
{
"name": "fake_cluster_1"
},
{
"name": "fake_cluster_2"
}`,
"envoy_extra_static_listeners_json": `
{
"name": "fake_listener_1"
},{
"name": "fake_listener_2"
}`,
"envoy_extra_stats_sinks_json": `
{
"name": "fake_sink_1"
} , { "name": "fake_sink_2" }`,
},
WantArgs: BootstrapTplArgs{
ProxyCluster: "test-proxy",
ProxyID: "test-proxy",
AgentAddress: "127.0.0.1",
AgentPort: "8502",
AdminBindAddress: "127.0.0.1",
AdminBindPort: "19000",
LocalAgentClusterName: xds.LocalAgentClusterName,
},
},
{
Name: "stats-config-override",
Flags: []string{"-proxy-id", "test-proxy"},
Env: []string{},
ProxyConfig: map[string]interface{}{
// Add a custom sections with interpolated variables. These are all
// invalid config syntax too but we are just testing they have the right
// effect.
"envoy_stats_config_json": `
{
"name": "fake_config"
}`,
},
WantArgs: BootstrapTplArgs{
ProxyCluster: "test-proxy",
ProxyID: "test-proxy",
AgentAddress: "127.0.0.1",
AgentPort: "8502",
AdminBindAddress: "127.0.0.1",
AdminBindPort: "19000",
LocalAgentClusterName: xds.LocalAgentClusterName,
},
},
{
Name: "zipkin-tracing-config",
Flags: []string{"-proxy-id", "test-proxy"},
Env: []string{},
ProxyConfig: map[string]interface{}{
// Add a custom sections with interpolated variables. These are all
// invalid config syntax too but we are just testing they have the right
// effect.
"envoy_tracing_json": `{
"http": {
"name": "envoy.zipkin",
"config": {
"collector_cluster": "zipkin",
"collector_endpoint": "/api/v1/spans"
}
}
}`,
// Need to setup the cluster to send that too as well
"envoy_extra_static_clusters_json": `{
"name": "zipkin",
"type": "STRICT_DNS",
"connect_timeout": "5s",
"load_assignment": {
"cluster_name": "zipkin",
"endpoints": [
{
"lb_endpoints": [
{
"endpoint": {
"address": {
"socket_address": {
"address": "zipkin.service.consul",
"port_value": 9411
}
}
}
}
]
}
]
}
}`,
},
WantArgs: BootstrapTplArgs{
ProxyCluster: "test-proxy",
ProxyID: "test-proxy",
AgentAddress: "127.0.0.1",
AgentPort: "8502",
AdminBindAddress: "127.0.0.1",
AdminBindPort: "19000",
LocalAgentClusterName: xds.LocalAgentClusterName,
},
},
}
copyAndReplaceAll := func(s []string, old, new string) []string {
out := make([]string, len(s))
for i, v := range s {
out[i] = strings.ReplaceAll(v, old, new)
}
return out
}
for _, tc := range cases {
t.Run(tc.Name, func(t *testing.T) {
require := require.New(t)
testDir := testutil.TempDir(t, "envoytest")
defer os.RemoveAll(testDir)
if len(tc.Files) > 0 {
for fn, fv := range tc.Files {
fullname := filepath.Join(testDir, fn)
require.NoError(ioutil.WriteFile(fullname, []byte(fv), 0600))
}
}
ui := cli.NewMockUi()
c := New(ui)
// Run a mock agent API that just always returns the proxy config in the
// test.
srv := httptest.NewServer(testMockAgentProxyConfig(tc.ProxyConfig))
defer srv.Close()
// Set the agent HTTP address in ENV to be our mock
tc.Env = append(tc.Env, "CONSUL_HTTP_ADDR="+srv.URL)
testDirPrefix := testDir + string(filepath.Separator)
myFlags := copyAndReplaceAll(tc.Flags, "@@TEMPDIR@@", testDirPrefix)
myEnv := copyAndReplaceAll(tc.Env, "@@TEMPDIR@@", testDirPrefix)
defer testSetAndResetEnv(t, myEnv)()
// Run the command
args := append([]string{"-bootstrap"}, myFlags...)
code := c.Run(args)
if tc.WantErr == "" {
require.Equal(0, code, ui.ErrorWriter.String())
} else {
require.Equal(1, code, ui.ErrorWriter.String())
require.Contains(ui.ErrorWriter.String(), tc.WantErr)
return
}
// Verify we handled the env and flags right first to get correct template
// args.
got, err := c.templateArgs()
require.NoError(err) // Error cases should have returned above
require.Equal(&tc.WantArgs, got)
// Actual template output goes to stdout direct to avoid prefix in UI, so
// generate it again here to assert on.
actual, err := c.generateConfig()
require.NoError(err)
// If we got the arg handling write, verify output
golden := filepath.Join("testdata", tc.Name+".golden")
if *update {
ioutil.WriteFile(golden, actual, 0644)
}
expected, err := ioutil.ReadFile(golden)
require.NoError(err)
require.Equal(string(expected), string(actual))
})
}
}
func testMockAgentProxyConfig(cfg map[string]interface{}) http.HandlerFunc {
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
// Parse the proxy-id from the end of the URL (blindly assuming it's correct
// format)
proxyID := strings.TrimPrefix(r.URL.Path, "/v1/agent/service/")
serviceID := strings.TrimSuffix(proxyID, "-sidecar-proxy")
svc := api.AgentService{
Kind: api.ServiceKindConnectProxy,
ID: proxyID,
Service: proxyID,
Proxy: &api.AgentServiceConnectProxyConfig{
DestinationServiceName: serviceID,
DestinationServiceID: serviceID,
Config: cfg,
},
}
cfgJSON, err := json.Marshal(svc)
if err != nil {
w.WriteHeader(500)
w.Write([]byte(err.Error()))
return
}
w.Write(cfgJSON)
})
}
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