mirror of https://github.com/hashicorp/consul
490 lines
12 KiB
Go
490 lines
12 KiB
Go
package router
|
|
|
|
import (
|
|
"fmt"
|
|
"net"
|
|
"reflect"
|
|
"sort"
|
|
"strings"
|
|
"testing"
|
|
"time"
|
|
|
|
"github.com/hashicorp/consul/agent/structs"
|
|
"github.com/hashicorp/consul/lib"
|
|
"github.com/hashicorp/consul/sdk/testutil"
|
|
"github.com/hashicorp/consul/types"
|
|
"github.com/hashicorp/serf/coordinate"
|
|
"github.com/hashicorp/serf/serf"
|
|
)
|
|
|
|
type mockCluster struct {
|
|
self string
|
|
members []serf.Member
|
|
coords map[string]*coordinate.Coordinate
|
|
addr int
|
|
}
|
|
|
|
func newMockCluster(self string) *mockCluster {
|
|
return &mockCluster{
|
|
self: self,
|
|
coords: make(map[string]*coordinate.Coordinate),
|
|
addr: 1,
|
|
}
|
|
}
|
|
|
|
func (m *mockCluster) NumNodes() int {
|
|
return len(m.members)
|
|
}
|
|
|
|
func (m *mockCluster) Members() []serf.Member {
|
|
return m.members
|
|
}
|
|
|
|
func (m *mockCluster) GetCoordinate() (*coordinate.Coordinate, error) {
|
|
return m.coords[m.self], nil
|
|
}
|
|
|
|
func (m *mockCluster) GetCachedCoordinate(name string) (*coordinate.Coordinate, bool) {
|
|
coord, ok := m.coords[name]
|
|
return coord, ok
|
|
}
|
|
|
|
func (m *mockCluster) AddMember(dc string, name string, coord *coordinate.Coordinate) {
|
|
member := serf.Member{
|
|
Name: fmt.Sprintf("%s.%s", name, dc),
|
|
Addr: net.ParseIP(fmt.Sprintf("127.0.0.%d", m.addr)),
|
|
Port: 8300,
|
|
Tags: map[string]string{
|
|
"dc": dc,
|
|
"role": "consul",
|
|
"port": "8300",
|
|
"build": "0.8.0",
|
|
"vsn": "3",
|
|
},
|
|
}
|
|
m.members = append(m.members, member)
|
|
if coord != nil {
|
|
m.coords[member.Name] = coord
|
|
}
|
|
m.addr++
|
|
}
|
|
|
|
// testCluster is used to generate a single WAN-like area with a known set of
|
|
// member and RTT topology.
|
|
//
|
|
// Here's the layout of the nodes:
|
|
//
|
|
// /---- dc1 ----\ /- dc2 -\ /- dc0 -\
|
|
// node2 node1 node3 node1 node0
|
|
// | | | | | | | | | | |
|
|
// 0 1 2 3 4 5 6 7 8 9 10 (ms)
|
|
//
|
|
// We also include a node4 in dc1 with no known coordinate, as well as a
|
|
// mysterious dcX with no nodes with known coordinates.
|
|
func testCluster(self string) *mockCluster {
|
|
c := newMockCluster(self)
|
|
c.AddMember("dc0", "node0", lib.GenerateCoordinate(10*time.Millisecond))
|
|
c.AddMember("dc1", "node1", lib.GenerateCoordinate(3*time.Millisecond))
|
|
c.AddMember("dc1", "node2", lib.GenerateCoordinate(2*time.Millisecond))
|
|
c.AddMember("dc1", "node3", lib.GenerateCoordinate(5*time.Millisecond))
|
|
c.AddMember("dc1", "node4", nil)
|
|
c.AddMember("dc2", "node1", lib.GenerateCoordinate(8*time.Millisecond))
|
|
c.AddMember("dcX", "node1", nil)
|
|
return c
|
|
}
|
|
|
|
func testRouter(t testing.TB, dc string) *Router {
|
|
logger := testutil.Logger(t)
|
|
return NewRouter(logger, dc)
|
|
}
|
|
|
|
func TestRouter_Shutdown(t *testing.T) {
|
|
r := testRouter(t, "dc0")
|
|
|
|
// Create a WAN-looking area.
|
|
self := "node0.dc0"
|
|
wan := testCluster(self)
|
|
if err := r.AddArea(types.AreaWAN, wan, &fauxConnPool{}, false); err != nil {
|
|
t.Fatalf("err: %v", err)
|
|
}
|
|
|
|
// Add another area.
|
|
otherID := types.AreaID("other")
|
|
other := newMockCluster(self)
|
|
other.AddMember("dcY", "node1", nil)
|
|
if err := r.AddArea(otherID, other, &fauxConnPool{}, false); err != nil {
|
|
t.Fatalf("err: %v", err)
|
|
}
|
|
_, _, ok := r.FindRoute("dcY")
|
|
if !ok {
|
|
t.Fatalf("bad")
|
|
}
|
|
|
|
// Shutdown and make sure we can't see any routes from before.
|
|
r.Shutdown()
|
|
_, _, ok = r.FindRoute("dcY")
|
|
if ok {
|
|
t.Fatalf("bad")
|
|
}
|
|
|
|
// You can't add areas once the router is shut down.
|
|
err := r.AddArea(otherID, other, &fauxConnPool{}, false)
|
|
if err == nil || !strings.Contains(err.Error(), "router is shut down") {
|
|
t.Fatalf("err: %v", err)
|
|
}
|
|
}
|
|
|
|
func TestRouter_Routing(t *testing.T) {
|
|
r := testRouter(t, "dc0")
|
|
|
|
// Create a WAN-looking area.
|
|
self := "node0.dc0"
|
|
wan := testCluster(self)
|
|
if err := r.AddArea(types.AreaWAN, wan, &fauxConnPool{}, false); err != nil {
|
|
t.Fatalf("err: %v", err)
|
|
}
|
|
|
|
// Adding the area should enable all the routes right away.
|
|
if _, _, ok := r.FindRoute("dc0"); !ok {
|
|
t.Fatalf("bad")
|
|
}
|
|
if _, _, ok := r.FindRoute("dc1"); !ok {
|
|
t.Fatalf("bad")
|
|
}
|
|
if _, _, ok := r.FindRoute("dc2"); !ok {
|
|
t.Fatalf("bad")
|
|
}
|
|
if _, _, ok := r.FindRoute("dcX"); !ok {
|
|
t.Fatalf("bad")
|
|
}
|
|
|
|
// This hasn't been added yet.
|
|
if _, _, ok := r.FindRoute("dcY"); ok {
|
|
t.Fatalf("bad")
|
|
}
|
|
|
|
// Add another area.
|
|
otherID := types.AreaID("other")
|
|
other := newMockCluster(self)
|
|
other.AddMember("dc0", "node0", nil)
|
|
other.AddMember("dc1", "node1", nil)
|
|
other.AddMember("dcY", "node1", nil)
|
|
if err := r.AddArea(otherID, other, &fauxConnPool{}, false); err != nil {
|
|
t.Fatalf("err: %v", err)
|
|
}
|
|
|
|
// Now we should have a route to every DC.
|
|
if _, _, ok := r.FindRoute("dc0"); !ok {
|
|
t.Fatalf("bad")
|
|
}
|
|
if _, _, ok := r.FindRoute("dc1"); !ok {
|
|
t.Fatalf("bad")
|
|
}
|
|
if _, _, ok := r.FindRoute("dc2"); !ok {
|
|
t.Fatalf("bad")
|
|
}
|
|
if _, _, ok := r.FindRoute("dcX"); !ok {
|
|
t.Fatalf("bad")
|
|
}
|
|
if _, _, ok := r.FindRoute("dcY"); !ok {
|
|
t.Fatalf("bad")
|
|
}
|
|
|
|
// Get the route for dcY and then fail the server. This will still
|
|
// give the server back since we have no other choice.
|
|
_, s, ok := r.FindRoute("dcY")
|
|
if !ok {
|
|
t.Fatalf("bad")
|
|
}
|
|
if err := r.FailServer(otherID, s); err != nil {
|
|
t.Fatalf("err: %v", err)
|
|
}
|
|
if _, _, ok := r.FindRoute("dcY"); !ok {
|
|
t.Fatalf("bad")
|
|
}
|
|
|
|
// But if we remove the server we won't get a route.
|
|
if err := r.RemoveServer(otherID, s); err != nil {
|
|
t.Fatalf("err: %v", err)
|
|
}
|
|
if _, _, ok := r.FindRoute("dcY"); ok {
|
|
t.Fatalf("bad")
|
|
}
|
|
|
|
// Make sure the dcY manager also got removed from the area and from
|
|
// the index we use for routing.
|
|
func() {
|
|
r.RLock()
|
|
defer r.RUnlock()
|
|
|
|
area, ok := r.areas[otherID]
|
|
if !ok {
|
|
t.Fatalf("bad")
|
|
}
|
|
|
|
if _, ok := area.managers["dcY"]; ok {
|
|
t.Fatalf("bad")
|
|
}
|
|
|
|
if _, ok := r.managers["dcY"]; ok {
|
|
t.Fatalf("bad")
|
|
}
|
|
}()
|
|
|
|
// Do similar for dc0, which will take two removes because the dc0 is
|
|
// reachable from two different areas.
|
|
_, s, ok = r.FindRoute("dc0")
|
|
if !ok {
|
|
t.Fatalf("bad")
|
|
}
|
|
if err := r.RemoveServer(types.AreaWAN, s); err != nil {
|
|
t.Fatalf("err: %v", err)
|
|
}
|
|
if _, _, ok = r.FindRoute("dc0"); !ok {
|
|
t.Fatalf("bad")
|
|
}
|
|
if err := r.RemoveServer(otherID, s); err != nil {
|
|
t.Fatalf("err: %v", err)
|
|
}
|
|
if _, _, ok = r.FindRoute("dc0"); ok {
|
|
t.Fatalf("bad")
|
|
}
|
|
|
|
// Now delete some areas.
|
|
if _, _, ok = r.FindRoute("dc1"); !ok {
|
|
t.Fatalf("bad")
|
|
}
|
|
if err := r.RemoveArea(types.AreaWAN); err != nil {
|
|
t.Fatalf("err: %v", err)
|
|
}
|
|
if _, _, ok = r.FindRoute("dc1"); !ok {
|
|
t.Fatalf("bad")
|
|
}
|
|
if err := r.RemoveArea(otherID); err != nil {
|
|
t.Fatalf("err: %v", err)
|
|
}
|
|
if _, _, ok = r.FindRoute("dc1"); ok {
|
|
t.Fatalf("bad")
|
|
}
|
|
}
|
|
|
|
func TestRouter_Routing_Offline(t *testing.T) {
|
|
r := testRouter(t, "dc0")
|
|
|
|
// Create a WAN-looking area.
|
|
self := "node0.dc0"
|
|
wan := testCluster(self)
|
|
if err := r.AddArea(types.AreaWAN, wan, &fauxConnPool{1.0}, false); err != nil {
|
|
t.Fatalf("err: %v", err)
|
|
}
|
|
|
|
// Adding the area should enable all the routes right away.
|
|
if _, _, ok := r.FindRoute("dc0"); !ok {
|
|
t.Fatalf("bad")
|
|
}
|
|
if _, _, ok := r.FindRoute("dc1"); !ok {
|
|
t.Fatalf("bad")
|
|
}
|
|
if _, _, ok := r.FindRoute("dc2"); !ok {
|
|
t.Fatalf("bad")
|
|
}
|
|
if _, _, ok := r.FindRoute("dcX"); !ok {
|
|
t.Fatalf("bad")
|
|
}
|
|
|
|
// Do a rebalance for dc1, which should knock it offline.
|
|
func() {
|
|
r.Lock()
|
|
defer r.Unlock()
|
|
|
|
area, ok := r.areas[types.AreaWAN]
|
|
if !ok {
|
|
t.Fatalf("bad")
|
|
}
|
|
|
|
info, ok := area.managers["dc1"]
|
|
if !ok {
|
|
t.Fatalf("bad")
|
|
}
|
|
info.manager.RebalanceServers()
|
|
}()
|
|
|
|
// Recheck all the routes.
|
|
if _, _, ok := r.FindRoute("dc0"); !ok {
|
|
t.Fatalf("bad")
|
|
}
|
|
if _, _, ok := r.FindRoute("dc1"); ok {
|
|
t.Fatalf("bad")
|
|
}
|
|
if _, _, ok := r.FindRoute("dc2"); !ok {
|
|
t.Fatalf("bad")
|
|
}
|
|
if _, _, ok := r.FindRoute("dcX"); !ok {
|
|
t.Fatalf("bad")
|
|
}
|
|
|
|
// Add another area with a route to dc1.
|
|
otherID := types.AreaID("other")
|
|
other := newMockCluster(self)
|
|
other.AddMember("dc0", "node0", nil)
|
|
other.AddMember("dc1", "node1", nil)
|
|
if err := r.AddArea(otherID, other, &fauxConnPool{}, false); err != nil {
|
|
t.Fatalf("err: %v", err)
|
|
}
|
|
|
|
// Recheck all the routes and make sure it finds the one that's
|
|
// online.
|
|
if _, _, ok := r.FindRoute("dc0"); !ok {
|
|
t.Fatalf("bad")
|
|
}
|
|
if _, _, ok := r.FindRoute("dc1"); !ok {
|
|
t.Fatalf("bad")
|
|
}
|
|
if _, _, ok := r.FindRoute("dc2"); !ok {
|
|
t.Fatalf("bad")
|
|
}
|
|
if _, _, ok := r.FindRoute("dcX"); !ok {
|
|
t.Fatalf("bad")
|
|
}
|
|
}
|
|
|
|
func TestRouter_GetDatacenters(t *testing.T) {
|
|
r := testRouter(t, "dc0")
|
|
|
|
self := "node0.dc0"
|
|
wan := testCluster(self)
|
|
if err := r.AddArea(types.AreaWAN, wan, &fauxConnPool{}, false); err != nil {
|
|
t.Fatalf("err: %v", err)
|
|
}
|
|
|
|
actual := r.GetDatacenters()
|
|
expected := []string{"dc0", "dc1", "dc2", "dcX"}
|
|
if !reflect.DeepEqual(actual, expected) {
|
|
t.Fatalf("bad: %#v", actual)
|
|
}
|
|
}
|
|
|
|
func TestRouter_distanceSorter(t *testing.T) {
|
|
actual := &datacenterSorter{
|
|
Names: []string{"foo", "bar", "baz", "zoo"},
|
|
Vec: []float64{3.0, 1.0, 1.0, 0.0},
|
|
}
|
|
sort.Stable(actual)
|
|
expected := &datacenterSorter{
|
|
Names: []string{"zoo", "bar", "baz", "foo"},
|
|
Vec: []float64{0.0, 1.0, 1.0, 3.0},
|
|
}
|
|
if !reflect.DeepEqual(actual, expected) {
|
|
t.Fatalf("bad: %#v", *expected)
|
|
}
|
|
}
|
|
|
|
func TestRouter_GetDatacentersByDistance(t *testing.T) {
|
|
r := testRouter(t, "dc0")
|
|
|
|
// Start with just the WAN area described in the diagram above.
|
|
self := "node0.dc0"
|
|
wan := testCluster(self)
|
|
if err := r.AddArea(types.AreaWAN, wan, &fauxConnPool{}, false); err != nil {
|
|
t.Fatalf("err: %v", err)
|
|
}
|
|
|
|
actual, err := r.GetDatacentersByDistance()
|
|
if err != nil {
|
|
t.Fatalf("err: %v", err)
|
|
}
|
|
expected := []string{"dc0", "dc2", "dc1", "dcX"}
|
|
if !reflect.DeepEqual(actual, expected) {
|
|
t.Fatalf("bad: %#v", actual)
|
|
}
|
|
|
|
// Now add another area with a closer route for dc1.
|
|
otherID := types.AreaID("other")
|
|
other := newMockCluster(self)
|
|
other.AddMember("dc0", "node0", lib.GenerateCoordinate(20*time.Millisecond))
|
|
other.AddMember("dc1", "node1", lib.GenerateCoordinate(21*time.Millisecond))
|
|
if err := r.AddArea(otherID, other, &fauxConnPool{}, false); err != nil {
|
|
t.Fatalf("err: %v", err)
|
|
}
|
|
|
|
actual, err = r.GetDatacentersByDistance()
|
|
if err != nil {
|
|
t.Fatalf("err: %v", err)
|
|
}
|
|
expected = []string{"dc0", "dc1", "dc2", "dcX"}
|
|
if !reflect.DeepEqual(actual, expected) {
|
|
t.Fatalf("bad: %#v", actual)
|
|
}
|
|
}
|
|
|
|
func TestRouter_GetDatacenterMaps(t *testing.T) {
|
|
r := testRouter(t, "dc0")
|
|
|
|
self := "node0.dc0"
|
|
wan := testCluster(self)
|
|
if err := r.AddArea(types.AreaWAN, wan, &fauxConnPool{}, false); err != nil {
|
|
t.Fatalf("err: %v", err)
|
|
}
|
|
|
|
actual, err := r.GetDatacenterMaps()
|
|
if err != nil {
|
|
t.Fatalf("err: %v", err)
|
|
}
|
|
if len(actual) != 3 {
|
|
t.Fatalf("bad: %#v", actual)
|
|
}
|
|
for _, entry := range actual {
|
|
switch entry.Datacenter {
|
|
case "dc0":
|
|
if !reflect.DeepEqual(entry, structs.DatacenterMap{
|
|
Datacenter: "dc0",
|
|
AreaID: types.AreaWAN,
|
|
Coordinates: structs.Coordinates{
|
|
&structs.Coordinate{
|
|
Node: "node0.dc0",
|
|
Coord: lib.GenerateCoordinate(10 * time.Millisecond),
|
|
},
|
|
},
|
|
}) {
|
|
t.Fatalf("bad: %#v", entry)
|
|
}
|
|
case "dc1":
|
|
if !reflect.DeepEqual(entry, structs.DatacenterMap{
|
|
Datacenter: "dc1",
|
|
AreaID: types.AreaWAN,
|
|
Coordinates: structs.Coordinates{
|
|
&structs.Coordinate{
|
|
Node: "node1.dc1",
|
|
Coord: lib.GenerateCoordinate(3 * time.Millisecond),
|
|
},
|
|
&structs.Coordinate{
|
|
Node: "node2.dc1",
|
|
Coord: lib.GenerateCoordinate(2 * time.Millisecond),
|
|
},
|
|
&structs.Coordinate{
|
|
Node: "node3.dc1",
|
|
Coord: lib.GenerateCoordinate(5 * time.Millisecond),
|
|
},
|
|
},
|
|
}) {
|
|
t.Fatalf("bad: %#v", entry)
|
|
}
|
|
case "dc2":
|
|
if !reflect.DeepEqual(entry, structs.DatacenterMap{
|
|
Datacenter: "dc2",
|
|
AreaID: types.AreaWAN,
|
|
Coordinates: structs.Coordinates{
|
|
&structs.Coordinate{
|
|
Node: "node1.dc2",
|
|
Coord: lib.GenerateCoordinate(8 * time.Millisecond),
|
|
},
|
|
},
|
|
}) {
|
|
t.Fatalf("bad: %#v", entry)
|
|
}
|
|
default:
|
|
t.Fatalf("bad: %#v", entry)
|
|
}
|
|
}
|
|
}
|