open-consul/connect/service_test.go

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package connect
import (
"bytes"
"context"
"crypto/tls"
"crypto/x509"
"fmt"
"io"
"io/ioutil"
"net/http"
"strings"
"testing"
"time"
"github.com/stretchr/testify/assert"
"github.com/stretchr/testify/require"
"github.com/hashicorp/consul/agent"
"github.com/hashicorp/consul/agent/connect"
"github.com/hashicorp/consul/api"
"github.com/hashicorp/consul/sdk/testutil/retry"
"github.com/hashicorp/consul/testrpc"
)
// Assert io.Closer implementation
var _ io.Closer = new(Service)
func TestService_Name(t *testing.T) {
ca := connect.TestCA(t, nil)
s := TestService(t, "web", ca)
assert.Equal(t, "web", s.Name())
}
func TestService_Dial(t *testing.T) {
if testing.Short() {
t.Skip("too slow for testing.Short")
}
ca := connect.TestCA(t, nil)
tests := []struct {
name string
accept bool
handshake bool
presentService string
wantErr string
}{
{
name: "working",
accept: true,
handshake: true,
presentService: "db",
wantErr: "",
},
{
name: "tcp connect fail",
accept: false,
handshake: false,
presentService: "db",
wantErr: "connection refused",
},
{
name: "handshake timeout",
accept: true,
handshake: false,
presentService: "db",
wantErr: "i/o timeout",
},
{
name: "bad cert",
accept: true,
handshake: true,
presentService: "web",
wantErr: "peer certificate mismatch",
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
s := TestService(t, "web", ca)
ctx, cancel := context.WithTimeout(context.Background(),
100*time.Millisecond)
defer cancel()
testSvr := NewTestServer(t, tt.presentService, ca)
testSvr.TimeoutHandshake = !tt.handshake
if tt.accept {
go func() {
err := testSvr.Serve()
require.NoError(t, err)
}()
<-testSvr.Listening
defer testSvr.Close()
}
// Always expect to be connecting to a "DB"
resolver := &StaticResolver{
Addr: testSvr.Addr,
CertURI: connect.TestSpiffeIDService(t, "db"),
}
// All test runs should complete in under 500ms due to the timeout about.
// Don't wait for whole test run to get stuck.
testTimeout := 500 * time.Millisecond
testTimer := time.AfterFunc(testTimeout, func() {
panic(fmt.Sprintf("test timed out after %s", testTimeout))
})
conn, err := s.Dial(ctx, resolver)
testTimer.Stop()
if tt.wantErr == "" {
require.NoError(t, err)
require.IsType(t, &tls.Conn{}, conn)
} else {
require.Error(t, err)
require.Contains(t, err.Error(), tt.wantErr)
}
if err == nil {
conn.Close()
}
})
}
}
func TestService_ServerTLSConfig(t *testing.T) {
if testing.Short() {
t.Skip("too slow for testing.Short")
}
a := agent.StartTestAgent(t, agent.TestAgent{Name: "007", Overrides: `
connect {
test_ca_leaf_root_change_spread = "1ns"
}
`})
defer a.Shutdown()
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testrpc.WaitForTestAgent(t, a.RPC, "dc1")
client := a.Client()
agent := client.Agent()
// NewTestAgent setup a CA already by default
// Register a local agent service
reg := &api.AgentServiceRegistration{
Name: "web",
Port: 8080,
}
err := agent.ServiceRegister(reg)
require.NoError(t, err)
// Now we should be able to create a service that will eventually get it's TLS
// all by itself!
service, err := NewService("web", client)
require.NoError(t, err)
// Wait for it to be ready
select {
case <-service.ReadyWait():
// continue with test case below
case <-time.After(1 * time.Second):
t.Fatalf("timeout waiting for Service.ReadyWait after 1s")
}
tlsCfg := service.ServerTLSConfig()
// Sanity check it has a leaf with the right ServiceID and that validates with
// the given roots.
require.NotNil(t, tlsCfg.GetCertificate)
leaf, err := tlsCfg.GetCertificate(&tls.ClientHelloInfo{})
require.NoError(t, err)
cert, err := x509.ParseCertificate(leaf.Certificate[0])
require.NoError(t, err)
require.Len(t, cert.URIs, 1)
require.True(t, strings.HasSuffix(cert.URIs[0].String(), "/svc/web"))
// Verify it as a client would
err = clientSideVerifier(tlsCfg, leaf.Certificate)
require.NoError(t, err)
// Now test that rotating the root updates
{
// Setup a new generated CA
connect.TestCAConfigSet(t, a, nil)
}
// After some time, both root and leaves should be different but both should
// still be correct.
oldRootSubjects := bytes.Join(tlsCfg.RootCAs.Subjects(), []byte(", "))
oldLeafSerial := cert.SerialNumber
oldLeafKeyID := cert.SubjectKeyId
retry.Run(t, func(r *retry.R) {
updatedCfg := service.ServerTLSConfig()
// Wait until roots are different
rootSubjects := bytes.Join(updatedCfg.RootCAs.Subjects(), []byte(", "))
if bytes.Equal(oldRootSubjects, rootSubjects) {
r.Fatalf("root certificates should have changed, got %s",
rootSubjects)
}
leaf, err := updatedCfg.GetCertificate(&tls.ClientHelloInfo{})
r.Check(err)
cert, err := x509.ParseCertificate(leaf.Certificate[0])
r.Check(err)
if oldLeafSerial.Cmp(cert.SerialNumber) == 0 {
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r.Fatalf("leaf certificate should have changed, got serial %s",
connect.EncodeSerialNumber(oldLeafSerial))
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}
if bytes.Equal(oldLeafKeyID, cert.SubjectKeyId) {
r.Fatalf("leaf should have a different key, got matching SubjectKeyID = %s",
connect.HexString(oldLeafKeyID))
}
})
}
func TestService_HTTPClient(t *testing.T) {
ca := connect.TestCA(t, nil)
s := TestService(t, "web", ca)
// Run a test HTTP server
testSvr := NewTestServer(t, "backend", ca)
defer testSvr.Close()
go func() {
err := testSvr.ServeHTTPS(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
w.Write([]byte("Hello, I am Backend"))
}))
require.NoError(t, err)
}()
<-testSvr.Listening
// Still get connection refused some times so retry on those
retry.Run(t, func(r *retry.R) {
// Hook the service resolver to avoid needing full agent setup.
s.httpResolverFromAddr = func(addr string) (Resolver, error) {
// Require in this goroutine seems to block causing a timeout on the Get.
//require.Equal(t,"https://backend.service.consul:443", addr)
return &StaticResolver{
Addr: testSvr.Addr,
CertURI: connect.TestSpiffeIDService(t, "backend"),
}, nil
}
client := s.HTTPClient()
client.Timeout = 1 * time.Second
resp, err := client.Get("https://backend.service.consul/foo")
r.Check(err)
defer resp.Body.Close()
bodyBytes, err := ioutil.ReadAll(resp.Body)
r.Check(err)
got := string(bodyBytes)
want := "Hello, I am Backend"
if got != want {
r.Fatalf("got %s, want %s", got, want)
}
})
}
func TestService_HasDefaultHTTPResolverFromAddr(t *testing.T) {
client, err := api.NewClient(api.DefaultConfig())
require.NoError(t, err)
s, err := NewService("foo", client)
require.NoError(t, err)
// Sanity check this is actually set in constructor since we always override
// it in tests. Full tests of the resolver func are in resolver_test.go
require.NotNil(t, s.httpResolverFromAddr)
fn := s.httpResolverFromAddr
expected := &ConsulResolver{
Client: client,
Namespace: "default",
Name: "foo",
Type: ConsulResolverTypeService,
}
got, err := fn("foo.service.consul")
require.NoError(t, err)
require.Equal(t, expected, got)
}