open-consul/agent/consul/client_test.go
Pierre Souchay a72f92cac6 dns: implements prefix lookups for DNS TTL (#4605)
This will fix https://github.com/hashicorp/consul/issues/4509 and allow forinstance lb-* to match services lb-001 or lb-service-007.
2018-10-19 08:41:04 -07:00

693 lines
16 KiB
Go

package consul
import (
"bytes"
"net"
"os"
"sync"
"testing"
"time"
"github.com/hashicorp/consul/agent/structs"
"github.com/hashicorp/consul/lib/freeport"
"github.com/hashicorp/consul/testrpc"
"github.com/hashicorp/consul/testutil"
"github.com/hashicorp/consul/testutil/retry"
"github.com/hashicorp/net-rpc-msgpackrpc"
"github.com/hashicorp/serf/serf"
"github.com/stretchr/testify/require"
"golang.org/x/time/rate"
)
func testClientConfig(t *testing.T) (string, *Config) {
dir := testutil.TempDir(t, "consul")
config := DefaultConfig()
config.Datacenter = "dc1"
config.DataDir = dir
config.NodeName = uniqueNodeName(t.Name())
config.RPCAddr = &net.TCPAddr{
IP: []byte{127, 0, 0, 1},
Port: freeport.Get(1)[0],
}
config.SerfLANConfig.MemberlistConfig.BindAddr = "127.0.0.1"
config.SerfLANConfig.MemberlistConfig.BindPort = freeport.Get(1)[0]
config.SerfLANConfig.MemberlistConfig.ProbeTimeout = 200 * time.Millisecond
config.SerfLANConfig.MemberlistConfig.ProbeInterval = time.Second
config.SerfLANConfig.MemberlistConfig.GossipInterval = 100 * time.Millisecond
return dir, config
}
func testClient(t *testing.T) (string, *Client) {
return testClientWithConfig(t, func(c *Config) {
c.Datacenter = "dc1"
c.NodeName = uniqueNodeName(t.Name())
})
}
func testClientDC(t *testing.T, dc string) (string, *Client) {
return testClientWithConfig(t, func(c *Config) {
c.Datacenter = dc
c.NodeName = uniqueNodeName(t.Name())
})
}
func testClientWithConfig(t *testing.T, cb func(c *Config)) (string, *Client) {
dir, config := testClientConfig(t)
if cb != nil {
cb(config)
}
client, err := NewClient(config)
if err != nil {
t.Fatalf("err: %v", err)
}
return dir, client
}
func TestClient_StartStop(t *testing.T) {
t.Parallel()
dir, client := testClient(t)
defer os.RemoveAll(dir)
if err := client.Shutdown(); err != nil {
t.Fatalf("err: %v", err)
}
}
func TestClient_JoinLAN(t *testing.T) {
t.Parallel()
dir1, s1 := testServer(t)
defer os.RemoveAll(dir1)
defer s1.Shutdown()
dir2, c1 := testClient(t)
defer os.RemoveAll(dir2)
defer c1.Shutdown()
// Try to join
joinLAN(t, c1, s1)
retry.Run(t, func(r *retry.R) {
if got, want := c1.routers.NumServers(), 1; got != want {
r.Fatalf("got %d servers want %d", got, want)
}
if got, want := len(s1.LANMembers()), 2; got != want {
r.Fatalf("got %d server LAN members want %d", got, want)
}
if got, want := len(c1.LANMembers()), 2; got != want {
r.Fatalf("got %d client LAN members want %d", got, want)
}
})
}
func TestClient_JoinLAN_Invalid(t *testing.T) {
t.Parallel()
dir1, s1 := testServer(t)
defer os.RemoveAll(dir1)
defer s1.Shutdown()
dir2, c1 := testClientDC(t, "other")
defer os.RemoveAll(dir2)
defer c1.Shutdown()
// Try to join
if _, err := c1.JoinLAN([]string{joinAddrLAN(s1)}); err == nil {
t.Fatal("should error")
}
time.Sleep(50 * time.Millisecond)
if len(s1.LANMembers()) != 1 {
t.Fatalf("should not join")
}
if len(c1.LANMembers()) != 1 {
t.Fatalf("should not join")
}
}
func TestClient_JoinWAN_Invalid(t *testing.T) {
t.Parallel()
dir1, s1 := testServer(t)
defer os.RemoveAll(dir1)
defer s1.Shutdown()
dir2, c1 := testClientDC(t, "dc2")
defer os.RemoveAll(dir2)
defer c1.Shutdown()
// Try to join
if _, err := c1.JoinLAN([]string{joinAddrWAN(s1)}); err == nil {
t.Fatal("should error")
}
time.Sleep(50 * time.Millisecond)
if len(s1.WANMembers()) != 1 {
t.Fatalf("should not join")
}
if len(c1.LANMembers()) != 1 {
t.Fatalf("should not join")
}
}
func TestClient_RPC(t *testing.T) {
t.Parallel()
dir1, s1 := testServer(t)
defer os.RemoveAll(dir1)
defer s1.Shutdown()
dir2, c1 := testClient(t)
defer os.RemoveAll(dir2)
defer c1.Shutdown()
// Try an RPC
var out struct{}
if err := c1.RPC("Status.Ping", struct{}{}, &out); err != structs.ErrNoServers {
t.Fatalf("err: %v", err)
}
// Try to join
joinLAN(t, c1, s1)
// Check the members
if len(s1.LANMembers()) != 2 {
t.Fatalf("bad len")
}
if len(c1.LANMembers()) != 2 {
t.Fatalf("bad len")
}
// RPC should succeed
retry.Run(t, func(r *retry.R) {
if err := c1.RPC("Status.Ping", struct{}{}, &out); err != nil {
r.Fatal("ping failed", err)
}
})
}
type leaderFailer struct {
totalCalls int
onceCalls int
}
func (l *leaderFailer) Always(args struct{}, reply *struct{}) error {
l.totalCalls++
return structs.ErrNoLeader
}
func (l *leaderFailer) Once(args struct{}, reply *struct{}) error {
l.totalCalls++
l.onceCalls++
switch {
case l.onceCalls == 1:
return structs.ErrNoLeader
default:
return nil
}
}
func TestClient_RPC_Retry(t *testing.T) {
t.Parallel()
dir1, s1 := testServer(t)
defer os.RemoveAll(dir1)
defer s1.Shutdown()
dir2, c1 := testClientWithConfig(t, func(c *Config) {
c.Datacenter = "dc1"
c.NodeName = uniqueNodeName(t.Name())
c.RPCHoldTimeout = 2 * time.Second
})
defer os.RemoveAll(dir2)
defer c1.Shutdown()
joinLAN(t, c1, s1)
retry.Run(t, func(r *retry.R) {
var out struct{}
if err := c1.RPC("Status.Ping", struct{}{}, &out); err != nil {
r.Fatalf("err: %v", err)
}
})
failer := &leaderFailer{}
if err := s1.RegisterEndpoint("Fail", failer); err != nil {
t.Fatalf("err: %v", err)
}
var out struct{}
if err := c1.RPC("Fail.Always", struct{}{}, &out); !structs.IsErrNoLeader(err) {
t.Fatalf("err: %v", err)
}
if got, want := failer.totalCalls, 2; got < want {
t.Fatalf("got %d want >= %d", got, want)
}
if err := c1.RPC("Fail.Once", struct{}{}, &out); err != nil {
t.Fatalf("err: %v", err)
}
if got, want := failer.onceCalls, 2; got < want {
t.Fatalf("got %d want >= %d", got, want)
}
if got, want := failer.totalCalls, 4; got < want {
t.Fatalf("got %d want >= %d", got, want)
}
}
func TestClient_RPC_Pool(t *testing.T) {
t.Parallel()
dir1, s1 := testServer(t)
defer os.RemoveAll(dir1)
defer s1.Shutdown()
dir2, c1 := testClient(t)
defer os.RemoveAll(dir2)
defer c1.Shutdown()
// Try to join.
joinLAN(t, c1, s1)
// Wait for both agents to finish joining
retry.Run(t, func(r *retry.R) {
if got, want := len(s1.LANMembers()), 2; got != want {
r.Fatalf("got %d server LAN members want %d", got, want)
}
if got, want := len(c1.LANMembers()), 2; got != want {
r.Fatalf("got %d client LAN members want %d", got, want)
}
})
// Blast out a bunch of RPC requests at the same time to try to get
// contention opening new connections.
var wg sync.WaitGroup
for i := 0; i < 150; i++ {
wg.Add(1)
go func() {
defer wg.Done()
var out struct{}
retry.Run(t, func(r *retry.R) {
if err := c1.RPC("Status.Ping", struct{}{}, &out); err != nil {
r.Fatal("ping failed", err)
}
})
}()
}
wg.Wait()
}
func TestClient_RPC_ConsulServerPing(t *testing.T) {
t.Parallel()
var servers []*Server
var serverDirs []string
const numServers = 5
for n := 0; n < numServers; n++ {
bootstrap := n == 0
dir, s := testServerDCBootstrap(t, "dc1", bootstrap)
defer os.RemoveAll(dir)
defer s.Shutdown()
servers = append(servers, s)
serverDirs = append(serverDirs, dir)
}
const numClients = 1
clientDir, c := testClient(t)
defer os.RemoveAll(clientDir)
defer c.Shutdown()
// Join all servers.
for _, s := range servers {
joinLAN(t, c, s)
}
for _, s := range servers {
retry.Run(t, func(r *retry.R) { r.Check(wantPeers(s, numServers)) })
}
// Sleep to allow Serf to sync, shuffle, and let the shuffle complete
c.routers.ResetRebalanceTimer()
time.Sleep(time.Second)
if len(c.LANMembers()) != numServers+numClients {
t.Errorf("bad len: %d", len(c.LANMembers()))
}
for _, s := range servers {
if len(s.LANMembers()) != numServers+numClients {
t.Errorf("bad len: %d", len(s.LANMembers()))
}
}
// Ping each server in the list
var pingCount int
for range servers {
time.Sleep(200 * time.Millisecond)
s := c.routers.FindServer()
ok, err := c.connPool.Ping(s.Datacenter, s.Addr, s.Version, s.UseTLS)
if !ok {
t.Errorf("Unable to ping server %v: %s", s.String(), err)
}
pingCount++
// Artificially fail the server in order to rotate the server
// list
c.routers.NotifyFailedServer(s)
}
if pingCount != numServers {
t.Errorf("bad len: %d/%d", pingCount, numServers)
}
}
func TestClient_RPC_TLS(t *testing.T) {
t.Parallel()
dir1, conf1 := testServerConfig(t)
conf1.VerifyIncoming = true
conf1.VerifyOutgoing = true
configureTLS(conf1)
s1, err := NewServer(conf1)
if err != nil {
t.Fatalf("err: %v", err)
}
defer os.RemoveAll(dir1)
defer s1.Shutdown()
dir2, conf2 := testClientConfig(t)
conf2.VerifyOutgoing = true
configureTLS(conf2)
c1, err := NewClient(conf2)
if err != nil {
t.Fatalf("err: %v", err)
}
defer os.RemoveAll(dir2)
defer c1.Shutdown()
// Try an RPC
var out struct{}
if err := c1.RPC("Status.Ping", struct{}{}, &out); err != structs.ErrNoServers {
t.Fatalf("err: %v", err)
}
// Try to join
joinLAN(t, c1, s1)
// Wait for joins to finish/RPC to succeed
retry.Run(t, func(r *retry.R) {
if got, want := len(s1.LANMembers()), 2; got != want {
r.Fatalf("got %d server LAN members want %d", got, want)
}
if got, want := len(c1.LANMembers()), 2; got != want {
r.Fatalf("got %d client LAN members want %d", got, want)
}
if err := c1.RPC("Status.Ping", struct{}{}, &out); err != nil {
r.Fatal("ping failed", err)
}
})
}
func TestClient_RPC_RateLimit(t *testing.T) {
t.Parallel()
dir1, conf1 := testServerConfig(t)
s1, err := NewServer(conf1)
if err != nil {
t.Fatalf("err: %v", err)
}
defer os.RemoveAll(dir1)
defer s1.Shutdown()
testrpc.WaitForLeader(t, s1.RPC, "dc1")
dir2, conf2 := testClientConfig(t)
conf2.RPCRate = 2
conf2.RPCMaxBurst = 2
c1, err := NewClient(conf2)
if err != nil {
t.Fatalf("err: %v", err)
}
defer os.RemoveAll(dir2)
defer c1.Shutdown()
joinLAN(t, c1, s1)
retry.Run(t, func(r *retry.R) {
var out struct{}
if err := c1.RPC("Status.Ping", struct{}{}, &out); err != structs.ErrRPCRateExceeded {
r.Fatalf("err: %v", err)
}
})
}
func TestClient_SnapshotRPC(t *testing.T) {
t.Parallel()
dir1, s1 := testServer(t)
defer os.RemoveAll(dir1)
defer s1.Shutdown()
dir2, c1 := testClient(t)
defer os.RemoveAll(dir2)
defer c1.Shutdown()
// Wait for the leader
testrpc.WaitForLeader(t, s1.RPC, "dc1")
// Try to join.
joinLAN(t, c1, s1)
testrpc.WaitForLeader(t, c1.RPC, "dc1")
// Wait until we've got a healthy server.
retry.Run(t, func(r *retry.R) {
if got, want := c1.routers.NumServers(), 1; got != want {
r.Fatalf("got %d servers want %d", got, want)
}
})
// Take a snapshot.
var snap bytes.Buffer
args := structs.SnapshotRequest{
Datacenter: "dc1",
Op: structs.SnapshotSave,
}
if err := c1.SnapshotRPC(&args, bytes.NewReader([]byte("")), &snap, nil); err != nil {
t.Fatalf("err: %v", err)
}
// Restore a snapshot.
args.Op = structs.SnapshotRestore
if err := c1.SnapshotRPC(&args, &snap, nil, nil); err != nil {
t.Fatalf("err: %v", err)
}
}
func TestClient_SnapshotRPC_RateLimit(t *testing.T) {
t.Parallel()
dir1, s1 := testServer(t)
defer os.RemoveAll(dir1)
defer s1.Shutdown()
testrpc.WaitForLeader(t, s1.RPC, "dc1")
dir2, conf1 := testClientConfig(t)
conf1.RPCRate = 2
conf1.RPCMaxBurst = 2
c1, err := NewClient(conf1)
if err != nil {
t.Fatalf("err: %v", err)
}
defer os.RemoveAll(dir2)
defer c1.Shutdown()
joinLAN(t, c1, s1)
retry.Run(t, func(r *retry.R) {
if got, want := c1.routers.NumServers(), 1; got != want {
r.Fatalf("got %d servers want %d", got, want)
}
})
retry.Run(t, func(r *retry.R) {
var snap bytes.Buffer
args := structs.SnapshotRequest{
Datacenter: "dc1",
Op: structs.SnapshotSave,
}
if err := c1.SnapshotRPC(&args, bytes.NewReader([]byte("")), &snap, nil); err != structs.ErrRPCRateExceeded {
r.Fatalf("err: %v", err)
}
})
}
func TestClient_SnapshotRPC_TLS(t *testing.T) {
t.Parallel()
dir1, conf1 := testServerConfig(t)
conf1.VerifyIncoming = true
conf1.VerifyOutgoing = true
configureTLS(conf1)
s1, err := NewServer(conf1)
if err != nil {
t.Fatalf("err: %v", err)
}
defer os.RemoveAll(dir1)
defer s1.Shutdown()
dir2, conf2 := testClientConfig(t)
conf2.VerifyOutgoing = true
configureTLS(conf2)
c1, err := NewClient(conf2)
if err != nil {
t.Fatalf("err: %v", err)
}
defer os.RemoveAll(dir2)
defer c1.Shutdown()
// Wait for the leader
testrpc.WaitForLeader(t, s1.RPC, "dc1")
// Try to join.
joinLAN(t, c1, s1)
retry.Run(t, func(r *retry.R) {
if got, want := len(s1.LANMembers()), 2; got != want {
r.Fatalf("got %d server members want %d", got, want)
}
if got, want := len(c1.LANMembers()), 2; got != want {
r.Fatalf("got %d client members want %d", got, want)
}
// Wait until we've got a healthy server.
if got, want := c1.routers.NumServers(), 1; got != want {
r.Fatalf("got %d servers want %d", got, want)
}
})
// Take a snapshot.
var snap bytes.Buffer
args := structs.SnapshotRequest{
Datacenter: "dc1",
Op: structs.SnapshotSave,
}
if err := c1.SnapshotRPC(&args, bytes.NewReader([]byte("")), &snap, nil); err != nil {
t.Fatalf("err: %v", err)
}
// Restore a snapshot.
args.Op = structs.SnapshotRestore
if err := c1.SnapshotRPC(&args, &snap, nil, nil); err != nil {
t.Fatalf("err: %v", err)
}
}
func TestClientServer_UserEvent(t *testing.T) {
t.Parallel()
clientOut := make(chan serf.UserEvent, 2)
dir1, c1 := testClientWithConfig(t, func(conf *Config) {
conf.UserEventHandler = func(e serf.UserEvent) {
clientOut <- e
}
})
defer os.RemoveAll(dir1)
defer c1.Shutdown()
serverOut := make(chan serf.UserEvent, 2)
dir2, s1 := testServerWithConfig(t, func(conf *Config) {
conf.UserEventHandler = func(e serf.UserEvent) {
serverOut <- e
}
})
defer os.RemoveAll(dir2)
defer s1.Shutdown()
// Try to join
joinLAN(t, c1, s1)
// Wait for the leader
testrpc.WaitForLeader(t, s1.RPC, "dc1")
// Check the members
retry.Run(t, func(r *retry.R) {
if got, want := len(s1.LANMembers()), 2; got != want {
r.Fatalf("got %d server LAN members want %d", got, want)
}
if got, want := len(c1.LANMembers()), 2; got != want {
r.Fatalf("got %d client LAN members want %d", got, want)
}
})
// Fire the user event
codec := rpcClient(t, s1)
event := structs.EventFireRequest{
Name: "foo",
Datacenter: "dc1",
Payload: []byte("baz"),
}
if err := msgpackrpc.CallWithCodec(codec, "Internal.EventFire", &event, nil); err != nil {
t.Fatalf("err: %v", err)
}
// Wait for all the events
var clientReceived, serverReceived bool
for i := 0; i < 2; i++ {
select {
case e := <-clientOut:
switch e.Name {
case "foo":
clientReceived = true
default:
t.Fatalf("Bad: %#v", e)
}
case e := <-serverOut:
switch e.Name {
case "foo":
serverReceived = true
default:
t.Fatalf("Bad: %#v", e)
}
case <-time.After(10 * time.Second):
t.Fatalf("timeout")
}
}
if !serverReceived || !clientReceived {
t.Fatalf("missing events")
}
}
func TestClient_Encrypted(t *testing.T) {
t.Parallel()
dir1, c1 := testClient(t)
defer os.RemoveAll(dir1)
defer c1.Shutdown()
key := []byte{0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15}
dir2, c2 := testClientWithConfig(t, func(c *Config) {
c.SerfLANConfig.MemberlistConfig.SecretKey = key
})
defer os.RemoveAll(dir2)
defer c2.Shutdown()
if c1.Encrypted() {
t.Fatalf("should not be encrypted")
}
if !c2.Encrypted() {
t.Fatalf("should be encrypted")
}
}
func TestClient_Reload(t *testing.T) {
t.Parallel()
dir1, c := testClientWithConfig(t, func(c *Config) {
c.RPCRate = 500
c.RPCMaxBurst = 5000
})
defer os.RemoveAll(dir1)
defer c.Shutdown()
limiter := c.rpcLimiter.Load().(*rate.Limiter)
require.Equal(t, rate.Limit(500), limiter.Limit())
require.Equal(t, 5000, limiter.Burst())
c.config.RPCRate = 1000
c.config.RPCMaxBurst = 10000
require.NoError(t, c.ReloadConfig(c.config))
limiter = c.rpcLimiter.Load().(*rate.Limiter)
require.Equal(t, rate.Limit(1000), limiter.Limit())
require.Equal(t, 10000, limiter.Burst())
}