open-consul/agent/consul/rtt_test.go

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package consul
import (
"fmt"
"os"
"strings"
"testing"
"time"
"github.com/hashicorp/consul/agent/structs"
"github.com/hashicorp/consul/lib"
"github.com/hashicorp/consul/testrpc"
"github.com/hashicorp/consul-net-rpc/net-rpc-msgpackrpc"
"github.com/hashicorp/consul-net-rpc/net/rpc"
)
// verifyNodeSort makes sure the order of the nodes in the slice is the same as
// the expected order, expressed as a comma-separated string.
func verifyNodeSort(t *testing.T, nodes structs.Nodes, expected string) {
vec := make([]string, len(nodes))
for i, node := range nodes {
vec[i] = node.Node
}
actual := strings.Join(vec, ",")
if actual != expected {
t.Fatalf("bad sort: %s != %s", actual, expected)
}
}
// verifyServiceNodeSort makes sure the order of the nodes in the slice is the
// same as the expected order, expressed as a comma-separated string.
func verifyServiceNodeSort(t *testing.T, nodes structs.ServiceNodes, expected string) {
vec := make([]string, len(nodes))
for i, node := range nodes {
vec[i] = node.Node
}
actual := strings.Join(vec, ",")
if actual != expected {
t.Fatalf("bad sort: %s != %s", actual, expected)
}
}
// verifyHealthCheckSort makes sure the order of the nodes in the slice is the
// same as the expected order, expressed as a comma-separated string.
func verifyHealthCheckSort(t *testing.T, checks structs.HealthChecks, expected string) {
vec := make([]string, len(checks))
for i, check := range checks {
vec[i] = check.Node
}
actual := strings.Join(vec, ",")
if actual != expected {
t.Fatalf("bad sort: %s != %s", actual, expected)
}
}
// verifyCheckServiceNodeSort makes sure the order of the nodes in the slice is
// the same as the expected order, expressed as a comma-separated string.
func verifyCheckServiceNodeSort(t *testing.T, nodes structs.CheckServiceNodes, expected string) {
vec := make([]string, len(nodes))
for i, node := range nodes {
vec[i] = node.Node.Node
}
actual := strings.Join(vec, ",")
if actual != expected {
t.Fatalf("bad sort: %s != %s", actual, expected)
}
}
// seedCoordinates uses the client to set up a set of nodes with a specific
// set of distances from the origin. We also include the server so that we
// can wait for the coordinates to get committed to the Raft log.
//
// Here's the layout of the nodes:
//
// node3 node2 node5 node4 node1
// | | | | | | | | | | |
// 0 1 2 3 4 5 6 7 8 9 10 (ms)
//
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func seedCoordinates(t *testing.T, codec rpc.ClientCodec, server *Server) {
// Register some nodes.
for i := 0; i < 5; i++ {
req := structs.RegisterRequest{
Datacenter: "dc1",
Node: fmt.Sprintf("node%d", i+1),
Address: "127.0.0.1",
}
var reply struct{}
if err := msgpackrpc.CallWithCodec(codec, "Catalog.Register", &req, &reply); err != nil {
t.Fatalf("err: %v", err)
}
}
// Seed the fixed setup of the nodes.
updates := []structs.CoordinateUpdateRequest{
{
Datacenter: "dc1",
Node: "node1",
Coord: lib.GenerateCoordinate(10 * time.Millisecond),
},
{
Datacenter: "dc1",
Node: "node2",
Coord: lib.GenerateCoordinate(2 * time.Millisecond),
},
{
Datacenter: "dc1",
Node: "node3",
Coord: lib.GenerateCoordinate(1 * time.Millisecond),
},
{
Datacenter: "dc1",
Node: "node4",
Coord: lib.GenerateCoordinate(8 * time.Millisecond),
},
{
Datacenter: "dc1",
Node: "node5",
Coord: lib.GenerateCoordinate(3 * time.Millisecond),
},
}
// Apply the updates and wait a while for the batch to get committed to
// the Raft log.
for _, update := range updates {
var out struct{}
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if err := msgpackrpc.CallWithCodec(codec, "Coordinate.Update", &update, &out); err != nil {
t.Fatalf("err: %v", err)
}
}
time.Sleep(2 * server.config.CoordinateUpdatePeriod)
}
func TestRTT_sortNodesByDistanceFrom(t *testing.T) {
if testing.Short() {
t.Skip("too slow for testing.Short")
}
t.Parallel()
dir, server := testServer(t)
defer os.RemoveAll(dir)
defer server.Shutdown()
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codec := rpcClient(t, server)
defer codec.Close()
testrpc.WaitForTestAgent(t, server.RPC, "dc1")
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seedCoordinates(t, codec, server)
nodes := structs.Nodes{
&structs.Node{Node: "apple"},
&structs.Node{Node: "node1"},
&structs.Node{Node: "node2"},
&structs.Node{Node: "node3"},
&structs.Node{Node: "node4"},
&structs.Node{Node: "node5"},
}
// The zero value for the source should not trigger any sorting.
var source structs.QuerySource
if err := server.sortNodesByDistanceFrom(source, nodes); err != nil {
t.Fatalf("err: %v", err)
}
verifyNodeSort(t, nodes, "apple,node1,node2,node3,node4,node5")
// Same for a source in some other DC.
source.Node = "node1"
source.Datacenter = "dc2"
if err := server.sortNodesByDistanceFrom(source, nodes); err != nil {
t.Fatalf("err: %v", err)
}
verifyNodeSort(t, nodes, "apple,node1,node2,node3,node4,node5")
// Same for a source node in our DC that we have no coordinate for.
source.Node = "apple"
source.Datacenter = "dc1"
if err := server.sortNodesByDistanceFrom(source, nodes); err != nil {
t.Fatalf("err: %v", err)
}
verifyNodeSort(t, nodes, "apple,node1,node2,node3,node4,node5")
// Now sort relative to node1, note that apple doesn't have any seeded
// coordinate info so it should end up at the end, despite its lexical
// hegemony.
source.Node = "node1"
if err := server.sortNodesByDistanceFrom(source, nodes); err != nil {
t.Fatalf("err: %v", err)
}
verifyNodeSort(t, nodes, "node1,node4,node5,node2,node3,apple")
}
func TestRTT_sortNodesByDistanceFrom_Nodes(t *testing.T) {
if testing.Short() {
t.Skip("too slow for testing.Short")
}
t.Parallel()
dir, server := testServer(t)
defer os.RemoveAll(dir)
defer server.Shutdown()
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codec := rpcClient(t, server)
defer codec.Close()
testrpc.WaitForTestAgent(t, server.RPC, "dc1")
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seedCoordinates(t, codec, server)
nodes := structs.Nodes{
&structs.Node{Node: "apple"},
&structs.Node{Node: "node1"},
&structs.Node{Node: "node2"},
&structs.Node{Node: "node3"},
&structs.Node{Node: "node4"},
&structs.Node{Node: "node5"},
}
// Now sort relative to node1, note that apple doesn't have any
// seeded coordinate info so it should end up at the end, despite
// its lexical hegemony.
var source structs.QuerySource
source.Node = "node1"
source.Datacenter = "dc1"
if err := server.sortNodesByDistanceFrom(source, nodes); err != nil {
t.Fatalf("err: %v", err)
}
verifyNodeSort(t, nodes, "node1,node4,node5,node2,node3,apple")
// Try another sort from node2. Note that node5 and node3 are the
// same distance away so the stable sort should preserve the order
// they were in from the previous sort.
source.Node = "node2"
source.Datacenter = "dc1"
if err := server.sortNodesByDistanceFrom(source, nodes); err != nil {
t.Fatalf("err: %v", err)
}
verifyNodeSort(t, nodes, "node2,node5,node3,node4,node1,apple")
// Let's exercise the stable sort explicitly to make sure we didn't
// just get lucky.
nodes[1], nodes[2] = nodes[2], nodes[1]
if err := server.sortNodesByDistanceFrom(source, nodes); err != nil {
t.Fatalf("err: %v", err)
}
verifyNodeSort(t, nodes, "node2,node3,node5,node4,node1,apple")
}
func TestRTT_sortNodesByDistanceFrom_ServiceNodes(t *testing.T) {
if testing.Short() {
t.Skip("too slow for testing.Short")
}
t.Parallel()
dir, server := testServer(t)
defer os.RemoveAll(dir)
defer server.Shutdown()
testrpc.WaitForTestAgent(t, server.RPC, "dc1")
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codec := rpcClient(t, server)
defer codec.Close()
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seedCoordinates(t, codec, server)
nodes := structs.ServiceNodes{
&structs.ServiceNode{Node: "apple"},
&structs.ServiceNode{Node: "node1"},
&structs.ServiceNode{Node: "node2"},
&structs.ServiceNode{Node: "node3"},
&structs.ServiceNode{Node: "node4"},
&structs.ServiceNode{Node: "node5"},
}
// Now sort relative to node1, note that apple doesn't have any
// seeded coordinate info so it should end up at the end, despite
// its lexical hegemony.
var source structs.QuerySource
source.Node = "node1"
source.Datacenter = "dc1"
if err := server.sortNodesByDistanceFrom(source, nodes); err != nil {
t.Fatalf("err: %v", err)
}
verifyServiceNodeSort(t, nodes, "node1,node4,node5,node2,node3,apple")
// Try another sort from node2. Note that node5 and node3 are the
// same distance away so the stable sort should preserve the order
// they were in from the previous sort.
source.Node = "node2"
source.Datacenter = "dc1"
if err := server.sortNodesByDistanceFrom(source, nodes); err != nil {
t.Fatalf("err: %v", err)
}
verifyServiceNodeSort(t, nodes, "node2,node5,node3,node4,node1,apple")
// Let's exercise the stable sort explicitly to make sure we didn't
// just get lucky.
nodes[1], nodes[2] = nodes[2], nodes[1]
if err := server.sortNodesByDistanceFrom(source, nodes); err != nil {
t.Fatalf("err: %v", err)
}
verifyServiceNodeSort(t, nodes, "node2,node3,node5,node4,node1,apple")
}
func TestRTT_sortNodesByDistanceFrom_HealthChecks(t *testing.T) {
if testing.Short() {
t.Skip("too slow for testing.Short")
}
t.Parallel()
dir, server := testServer(t)
defer os.RemoveAll(dir)
defer server.Shutdown()
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codec := rpcClient(t, server)
defer codec.Close()
testrpc.WaitForLeader(t, server.RPC, "dc1")
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seedCoordinates(t, codec, server)
checks := structs.HealthChecks{
&structs.HealthCheck{Node: "apple"},
&structs.HealthCheck{Node: "node1"},
&structs.HealthCheck{Node: "node2"},
&structs.HealthCheck{Node: "node3"},
&structs.HealthCheck{Node: "node4"},
&structs.HealthCheck{Node: "node5"},
}
// Now sort relative to node1, note that apple doesn't have any
// seeded coordinate info so it should end up at the end, despite
// its lexical hegemony.
var source structs.QuerySource
source.Node = "node1"
source.Datacenter = "dc1"
if err := server.sortNodesByDistanceFrom(source, checks); err != nil {
t.Fatalf("err: %v", err)
}
verifyHealthCheckSort(t, checks, "node1,node4,node5,node2,node3,apple")
// Try another sort from node2. Note that node5 and node3 are the
// same distance away so the stable sort should preserve the order
// they were in from the previous sort.
source.Node = "node2"
source.Datacenter = "dc1"
if err := server.sortNodesByDistanceFrom(source, checks); err != nil {
t.Fatalf("err: %v", err)
}
verifyHealthCheckSort(t, checks, "node2,node5,node3,node4,node1,apple")
// Let's exercise the stable sort explicitly to make sure we didn't
// just get lucky.
checks[1], checks[2] = checks[2], checks[1]
if err := server.sortNodesByDistanceFrom(source, checks); err != nil {
t.Fatalf("err: %v", err)
}
verifyHealthCheckSort(t, checks, "node2,node3,node5,node4,node1,apple")
}
func TestRTT_sortNodesByDistanceFrom_CheckServiceNodes(t *testing.T) {
if testing.Short() {
t.Skip("too slow for testing.Short")
}
t.Parallel()
dir, server := testServer(t)
defer os.RemoveAll(dir)
defer server.Shutdown()
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codec := rpcClient(t, server)
defer codec.Close()
testrpc.WaitForTestAgent(t, server.RPC, "dc1")
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seedCoordinates(t, codec, server)
nodes := structs.CheckServiceNodes{
structs.CheckServiceNode{Node: &structs.Node{Node: "apple"}},
structs.CheckServiceNode{Node: &structs.Node{Node: "node1"}},
structs.CheckServiceNode{Node: &structs.Node{Node: "node2"}},
structs.CheckServiceNode{Node: &structs.Node{Node: "node3"}},
structs.CheckServiceNode{Node: &structs.Node{Node: "node4"}},
structs.CheckServiceNode{Node: &structs.Node{Node: "node5"}},
}
// Now sort relative to node1, note that apple doesn't have any
// seeded coordinate info so it should end up at the end, despite
// its lexical hegemony.
var source structs.QuerySource
source.Node = "node1"
source.Datacenter = "dc1"
if err := server.sortNodesByDistanceFrom(source, nodes); err != nil {
t.Fatalf("err: %v", err)
}
verifyCheckServiceNodeSort(t, nodes, "node1,node4,node5,node2,node3,apple")
// Try another sort from node2. Note that node5 and node3 are the
// same distance away so the stable sort should preserve the order
// they were in from the previous sort.
source.Node = "node2"
source.Datacenter = "dc1"
if err := server.sortNodesByDistanceFrom(source, nodes); err != nil {
t.Fatalf("err: %v", err)
}
verifyCheckServiceNodeSort(t, nodes, "node2,node5,node3,node4,node1,apple")
// Let's exercise the stable sort explicitly to make sure we didn't
// just get lucky.
nodes[1], nodes[2] = nodes[2], nodes[1]
if err := server.sortNodesByDistanceFrom(source, nodes); err != nil {
t.Fatalf("err: %v", err)
}
verifyCheckServiceNodeSort(t, nodes, "node2,node3,node5,node4,node1,apple")
}