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Adds distance sorting to health endpoint. Cleans up unit tests.

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This commit is contained in:
James Phillips 2015-07-27 14:41:46 -07:00
parent 019f656f39
commit ee1cf1e13b
9 changed files with 793 additions and 104 deletions
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3
command/agent/health_endpoint.go
View file

@ -9,6 +9,7 @@ import (
func (s *HTTPServer) HealthChecksInState(resp http.ResponseWriter, req *http.Request) (interface{}, error) {
// Set default DC
args := structs.ChecksInStateRequest{}
s.parseSource(req, &args.Source)
if done := s.parse(resp, req, &args.Datacenter, &args.QueryOptions); done {
return nil, nil
}
@ -57,6 +58,7 @@ func (s *HTTPServer) HealthNodeChecks(resp http.ResponseWriter, req *http.Reques
func (s *HTTPServer) HealthServiceChecks(resp http.ResponseWriter, req *http.Request) (interface{}, error) {
// Set default DC
args := structs.ServiceSpecificRequest{}
s.parseSource(req, &args.Source)
if done := s.parse(resp, req, &args.Datacenter, &args.QueryOptions); done {
return nil, nil
}
@ -81,6 +83,7 @@ func (s *HTTPServer) HealthServiceChecks(resp http.ResponseWriter, req *http.Req
func (s *HTTPServer) HealthServiceNodes(resp http.ResponseWriter, req *http.Request) (interface{}, error) {
// Set default DC
args := structs.ServiceSpecificRequest{}
s.parseSource(req, &args.Source)
if done := s.parse(resp, req, &args.Datacenter, &args.QueryOptions); done {
return nil, nil
}

260
command/agent/health_endpoint_test.go
View file

@ -2,13 +2,16 @@ package agent
import (
"fmt"
"github.com/hashicorp/consul/consul/structs"
"github.com/hashicorp/consul/testutil"
"net/http"
"net/http/httptest"
"os"
"reflect"
"testing"
"time"
"github.com/hashicorp/consul/consul/structs"
"github.com/hashicorp/consul/testutil"
"github.com/hashicorp/serf/coordinate"
)
func TestHealthChecksInState(t *testing.T) {
@ -38,6 +41,87 @@ func TestHealthChecksInState(t *testing.T) {
})
}
func TestHealthChecksInState_DistanceSort(t *testing.T) {
dir, srv := makeHTTPServer(t)
defer os.RemoveAll(dir)
defer srv.Shutdown()
defer srv.agent.Shutdown()
testutil.WaitForLeader(t, srv.agent.RPC, "dc1")
args := &structs.RegisterRequest{
Datacenter: "dc1",
Node: "bar",
Address: "127.0.0.1",
Check: &structs.HealthCheck{
Node: "bar",
Name: "node check",
Status: structs.HealthCritical,
},
}
var out struct{}
if err := srv.agent.RPC("Catalog.Register", args, &out); err != nil {
t.Fatalf("err: %v", err)
}
args.Node, args.Check.Node = "foo", "foo"
if err := srv.agent.RPC("Catalog.Register", args, &out); err != nil {
t.Fatalf("err: %v", err)
}
req, err := http.NewRequest("GET", "/v1/health/state/critical?dc=dc1&near=foo", nil)
if err != nil {
t.Fatalf("err: %v", err)
}
resp := httptest.NewRecorder()
obj, err := srv.HealthChecksInState(resp, req)
if err != nil {
t.Fatalf("err: %v", err)
}
assertIndex(t, resp)
nodes := obj.(structs.HealthChecks)
if len(nodes) != 2 {
t.Fatalf("bad: %v", nodes)
}
if nodes[0].Node != "bar" {
t.Fatalf("bad: %v", nodes)
}
if nodes[1].Node != "foo" {
t.Fatalf("bad: %v", nodes)
}
// Send an update for the node and wait for it to get applied.
arg := structs.CoordinateUpdateRequest{
Datacenter: "dc1",
Node: "foo",
Coord: coordinate.NewCoordinate(coordinate.DefaultConfig()),
}
if err := srv.agent.RPC("Coordinate.Update", &arg, &out); err != nil {
t.Fatalf("err: %v", err)
}
time.Sleep(200 * time.Millisecond)
// Query again and now foo should have moved to the front of the line.
resp = httptest.NewRecorder()
obj, err = srv.HealthChecksInState(resp, req)
if err != nil {
t.Fatalf("err: %v", err)
}
assertIndex(t, resp)
nodes = obj.(structs.HealthChecks)
if len(nodes) != 2 {
t.Fatalf("bad: %v", nodes)
}
if nodes[0].Node != "foo" {
t.Fatalf("bad: %v", nodes)
}
if nodes[1].Node != "bar" {
t.Fatalf("bad: %v", nodes)
}
}
func TestHealthNodeChecks(t *testing.T) {
dir, srv := makeHTTPServer(t)
defer os.RemoveAll(dir)
@ -110,6 +194,92 @@ func TestHealthServiceChecks(t *testing.T) {
}
}
func TestHealthServiceChecks_DistanceSort(t *testing.T) {
dir, srv := makeHTTPServer(t)
defer os.RemoveAll(dir)
defer srv.Shutdown()
defer srv.agent.Shutdown()
testutil.WaitForLeader(t, srv.agent.RPC, "dc1")
// Create a service check
args := &structs.RegisterRequest{
Datacenter: "dc1",
Node: "bar",
Address: "127.0.0.1",
Service: &structs.NodeService{
ID: "test",
Service: "test",
},
Check: &structs.HealthCheck{
Node: "bar",
Name: "test check",
ServiceID: "test",
},
}
var out struct{}
if err := srv.agent.RPC("Catalog.Register", args, &out); err != nil {
t.Fatalf("err: %v", err)
}
args.Node, args.Check.Node = "foo", "foo"
if err := srv.agent.RPC("Catalog.Register", args, &out); err != nil {
t.Fatalf("err: %v", err)
}
req, err := http.NewRequest("GET", "/v1/health/checks/test?dc=dc1&near=foo", nil)
if err != nil {
t.Fatalf("err: %v", err)
}
resp := httptest.NewRecorder()
obj, err := srv.HealthServiceChecks(resp, req)
if err != nil {
t.Fatalf("err: %v", err)
}
assertIndex(t, resp)
nodes := obj.(structs.HealthChecks)
if len(nodes) != 2 {
t.Fatalf("bad: %v", obj)
}
if nodes[0].Node != "bar" {
t.Fatalf("bad: %v", nodes)
}
if nodes[1].Node != "foo" {
t.Fatalf("bad: %v", nodes)
}
// Send an update for the node and wait for it to get applied.
arg := structs.CoordinateUpdateRequest{
Datacenter: "dc1",
Node: "foo",
Coord: coordinate.NewCoordinate(coordinate.DefaultConfig()),
}
if err := srv.agent.RPC("Coordinate.Update", &arg, &out); err != nil {
t.Fatalf("err: %v", err)
}
time.Sleep(200 * time.Millisecond)
// Query again and now foo should have moved to the front of the line.
resp = httptest.NewRecorder()
obj, err = srv.HealthServiceChecks(resp, req)
if err != nil {
t.Fatalf("err: %v", err)
}
assertIndex(t, resp)
nodes = obj.(structs.HealthChecks)
if len(nodes) != 2 {
t.Fatalf("bad: %v", obj)
}
if nodes[0].Node != "foo" {
t.Fatalf("bad: %v", nodes)
}
if nodes[1].Node != "bar" {
t.Fatalf("bad: %v", nodes)
}
}
func TestHealthServiceNodes(t *testing.T) {
dir, srv := makeHTTPServer(t)
defer os.RemoveAll(dir)
@ -138,6 +308,92 @@ func TestHealthServiceNodes(t *testing.T) {
}
}
func TestHealthServiceNodes_DistanceSort(t *testing.T) {
dir, srv := makeHTTPServer(t)
defer os.RemoveAll(dir)
defer srv.Shutdown()
defer srv.agent.Shutdown()
testutil.WaitForLeader(t, srv.agent.RPC, "dc1")
// Create a service check
args := &structs.RegisterRequest{
Datacenter: "dc1",
Node: "bar",
Address: "127.0.0.1",
Service: &structs.NodeService{
ID: "test",
Service: "test",
},
Check: &structs.HealthCheck{
Node: "bar",
Name: "test check",
ServiceID: "test",
},
}
var out struct{}
if err := srv.agent.RPC("Catalog.Register", args, &out); err != nil {
t.Fatalf("err: %v", err)
}
args.Node, args.Check.Node = "foo", "foo"
if err := srv.agent.RPC("Catalog.Register", args, &out); err != nil {
t.Fatalf("err: %v", err)
}
req, err := http.NewRequest("GET", "/v1/health/service/test?dc=dc1&near=foo", nil)
if err != nil {
t.Fatalf("err: %v", err)
}
resp := httptest.NewRecorder()
obj, err := srv.HealthServiceNodes(resp, req)
if err != nil {
t.Fatalf("err: %v", err)
}
assertIndex(t, resp)
nodes := obj.(structs.CheckServiceNodes)
if len(nodes) != 2 {
t.Fatalf("bad: %v", obj)
}
if nodes[0].Node.Node != "bar" {
t.Fatalf("bad: %v", nodes)
}
if nodes[1].Node.Node != "foo" {
t.Fatalf("bad: %v", nodes)
}
// Send an update for the node and wait for it to get applied.
arg := structs.CoordinateUpdateRequest{
Datacenter: "dc1",
Node: "foo",
Coord: coordinate.NewCoordinate(coordinate.DefaultConfig()),
}
if err := srv.agent.RPC("Coordinate.Update", &arg, &out); err != nil {
t.Fatalf("err: %v", err)
}
time.Sleep(200 * time.Millisecond)
// Query again and now foo should have moved to the front of the line.
resp = httptest.NewRecorder()
obj, err = srv.HealthServiceNodes(resp, req)
if err != nil {
t.Fatalf("err: %v", err)
}
assertIndex(t, resp)
nodes = obj.(structs.CheckServiceNodes)
if len(nodes) != 2 {
t.Fatalf("bad: %v", obj)
}
if nodes[0].Node.Node != "foo" {
t.Fatalf("bad: %v", nodes)
}
if nodes[1].Node.Node != "bar" {
t.Fatalf("bad: %v", nodes)
}
}
func TestHealthServiceNodes_PassingFilter(t *testing.T) {
dir, srv := makeHTTPServer(t)
defer os.RemoveAll(dir)

73
consul/catalog_endpoint_test.go
View file

@ -294,24 +294,6 @@ func TestCatalogListDatacenters_DistanceSort(t *testing.T) {
if out[2] != "dc2" {
t.Fatalf("bad: %v", out)
}
// Make sure we get the natural order if coordinates are disabled.
s1.config.DisableCoordinates = true
if err := client.Call("Catalog.ListDatacenters", struct{}{}, &out); err != nil {
t.Fatalf("err: %v", err)
}
if len(out) != 3 {
t.Fatalf("bad: %v", out)
}
if out[0] != "acdc" {
t.Fatalf("bad: %v", out)
}
if out[1] != "dc1" {
t.Fatalf("bad: %v", out)
}
if out[2] != "dc2" {
t.Fatalf("bad: %v", out)
}
}
func TestCatalogListNodes(t *testing.T) {
@ -529,7 +511,6 @@ func TestCatalogListNodes_DistanceSort(t *testing.T) {
client := rpcClient(t, s1)
defer client.Close()
// Add three nodes.
testutil.WaitForLeader(t, client.Call, "dc1")
if err := s1.fsm.State().EnsureNode(1, structs.Node{"aaa", "127.0.0.1"}); err != nil {
t.Fatalf("err: %v", err)
@ -609,34 +590,6 @@ func TestCatalogListNodes_DistanceSort(t *testing.T) {
if out.Nodes[4].Node != s1.config.NodeName {
t.Fatalf("bad: %v", out)
}
// Make sure we get the natural order if coordinates are disabled.
s1.config.DisableCoordinates = true
args = structs.DCSpecificRequest{
Datacenter: "dc1",
Source: structs.QuerySource{Datacenter: "dc1", Node: "foo"},
}
testutil.WaitForResult(func() (bool, error) {
client.Call("Catalog.ListNodes", &args, &out)
return len(out.Nodes) == 5, nil
}, func(err error) {
t.Fatalf("err: %v", err)
})
if out.Nodes[0].Node != "aaa" {
t.Fatalf("bad: %v", out)
}
if out.Nodes[1].Node != "bar" {
t.Fatalf("bad: %v", out)
}
if out.Nodes[2].Node != "baz" {
t.Fatalf("bad: %v", out)
}
if out.Nodes[3].Node != "foo" {
t.Fatalf("bad: %v", out)
}
if out.Nodes[4].Node != s1.config.NodeName {
t.Fatalf("bad: %v", out)
}
}
func BenchmarkCatalogListNodes(t *testing.B) {
@ -982,32 +935,6 @@ func TestCatalogListServiceNodes_DistanceSort(t *testing.T) {
if out.ServiceNodes[3].Node != "aaa" {
t.Fatalf("bad: %v", out)
}
// Make sure we get the natural order if coordinates are disabled.
s1.config.DisableCoordinates = true
args = structs.ServiceSpecificRequest{
Datacenter: "dc1",
ServiceName: "db",
Source: structs.QuerySource{Datacenter: "dc1", Node: "foo"},
}
if err := client.Call("Catalog.ServiceNodes", &args, &out); err != nil {
t.Fatalf("err: %v", err)
}
if len(out.ServiceNodes) != 4 {
t.Fatalf("bad: %v", out)
}
if out.ServiceNodes[0].Node != "aaa" {
t.Fatalf("bad: %v", out)
}
if out.ServiceNodes[1].Node != "foo" {
t.Fatalf("bad: %v", out)
}
if out.ServiceNodes[2].Node != "bar" {
t.Fatalf("bad: %v", out)
}
if out.ServiceNodes[3].Node != "baz" {
t.Fatalf("bad: %v", out)
}
}
func TestCatalogNodeServices(t *testing.T) {

16
consul/health_endpoint.go
View file

@ -30,7 +30,10 @@ func (h *Health) ChecksInState(args *structs.ChecksInStateRequest,
return err
}
reply.Index, reply.HealthChecks = index, checks
return h.srv.filterACL(args.Token, reply)
if err := h.srv.filterACL(args.Token, reply); err != nil {
return err
}
return h.srv.sortNodesByDistanceFrom(args.Source, reply.HealthChecks)
})
}
@ -82,7 +85,10 @@ func (h *Health) ServiceChecks(args *structs.ServiceSpecificRequest,
return err
}
reply.Index, reply.HealthChecks = index, checks
return h.srv.filterACL(args.Token, reply)
if err := h.srv.filterACL(args.Token, reply); err != nil {
return err
}
return h.srv.sortNodesByDistanceFrom(args.Source, reply.HealthChecks)
})
}
@ -115,8 +121,12 @@ func (h *Health) ServiceNodes(args *structs.ServiceSpecificRequest, reply *struc
if err != nil {
return err
}
reply.Index, reply.Nodes = index, nodes
return h.srv.filterACL(args.Token, reply)
if err := h.srv.filterACL(args.Token, reply); err != nil {
return err
}
return h.srv.sortNodesByDistanceFrom(args.Source, reply.Nodes)
})
// Provide some metrics

254
consul/health_endpoint_test.go
View file

@ -3,6 +3,7 @@ package consul
import (
"os"
"testing"
"time"
"github.com/hashicorp/consul/consul/structs"
"github.com/hashicorp/consul/testutil"
@ -55,6 +56,83 @@ func TestHealth_ChecksInState(t *testing.T) {
}
}
func TestHealth_ChecksInState_DistanceSort(t *testing.T) {
dir1, s1 := testServer(t)
defer os.RemoveAll(dir1)
defer s1.Shutdown()
client := rpcClient(t, s1)
defer client.Close()
testutil.WaitForLeader(t, client.Call, "dc1")
if err := s1.fsm.State().EnsureNode(1, structs.Node{"foo", "127.0.0.2"}); err != nil {
t.Fatalf("err: %v", err)
}
if err := s1.fsm.State().EnsureNode(2, structs.Node{"bar", "127.0.0.3"}); err != nil {
t.Fatalf("err: %v", err)
}
updates := []structs.Coordinate{
{"foo", generateCoordinate(1 * time.Millisecond)},
{"bar", generateCoordinate(2 * time.Millisecond)},
}
if err := s1.fsm.State().CoordinateBatchUpdate(3, updates); err != nil {
t.Fatalf("err: %v", err)
}
arg := structs.RegisterRequest{
Datacenter: "dc1",
Node: "foo",
Address: "127.0.0.1",
Check: &structs.HealthCheck{
Name: "memory utilization",
Status: structs.HealthPassing,
},
}
var out struct{}
if err := client.Call("Catalog.Register", &arg, &out); err != nil {
t.Fatalf("err: %v", err)
}
arg.Node = "bar"
if err := client.Call("Catalog.Register", &arg, &out); err != nil {
t.Fatalf("err: %v", err)
}
// Query relative to foo to make sure it shows up first in the list.
var out2 structs.IndexedHealthChecks
inState := structs.ChecksInStateRequest{
Datacenter: "dc1",
State: structs.HealthPassing,
Source: structs.QuerySource{
Datacenter: "dc1",
Node: "foo",
},
}
if err := client.Call("Health.ChecksInState", &inState, &out2); err != nil {
t.Fatalf("err: %v", err)
}
checks := out2.HealthChecks
if len(checks) != 3 {
t.Fatalf("Bad: %v", checks)
}
if checks[0].Node != "foo" {
t.Fatalf("Bad: %v", checks[1])
}
// Now query relative to bar to make sure it shows up first.
inState.Source.Node = "bar"
if err := client.Call("Health.ChecksInState", &inState, &out2); err != nil {
t.Fatalf("err: %v", err)
}
checks = out2.HealthChecks
if len(checks) != 3 {
t.Fatalf("Bad: %v", checks)
}
if checks[0].Node != "bar" {
t.Fatalf("Bad: %v", checks[1])
}
}
func TestHealth_NodeChecks(t *testing.T) {
dir1, s1 := testServer(t)
defer os.RemoveAll(dir1)
@ -142,6 +220,94 @@ func TestHealth_ServiceChecks(t *testing.T) {
}
}
func TestHealth_ServiceChecks_DistanceSort(t *testing.T) {
dir1, s1 := testServer(t)
defer os.RemoveAll(dir1)
defer s1.Shutdown()
client := rpcClient(t, s1)
defer client.Close()
testutil.WaitForLeader(t, client.Call, "dc1")
if err := s1.fsm.State().EnsureNode(1, structs.Node{"foo", "127.0.0.2"}); err != nil {
t.Fatalf("err: %v", err)
}
if err := s1.fsm.State().EnsureNode(2, structs.Node{"bar", "127.0.0.3"}); err != nil {
t.Fatalf("err: %v", err)
}
updates := []structs.Coordinate{
{"foo", generateCoordinate(1 * time.Millisecond)},
{"bar", generateCoordinate(2 * time.Millisecond)},
}
if err := s1.fsm.State().CoordinateBatchUpdate(3, updates); err != nil {
t.Fatalf("err: %v", err)
}
arg := structs.RegisterRequest{
Datacenter: "dc1",
Node: "foo",
Address: "127.0.0.1",
Service: &structs.NodeService{
ID: "db",
Service: "db",
},
Check: &structs.HealthCheck{
Name: "db connect",
Status: structs.HealthPassing,
ServiceID: "db",
},
}
var out struct{}
if err := client.Call("Catalog.Register", &arg, &out); err != nil {
t.Fatalf("err: %v", err)
}
arg.Node = "bar"
if err := client.Call("Catalog.Register", &arg, &out); err != nil {
t.Fatalf("err: %v", err)
}
// Query relative to foo to make sure it shows up first in the list.
var out2 structs.IndexedHealthChecks
node := structs.ServiceSpecificRequest{
Datacenter: "dc1",
ServiceName: "db",
Source: structs.QuerySource{
Datacenter: "dc1",
Node: "foo",
},
}
if err := client.Call("Health.ServiceChecks", &node, &out2); err != nil {
t.Fatalf("err: %v", err)
}
checks := out2.HealthChecks
if len(checks) != 2 {
t.Fatalf("Bad: %v", checks)
}
if checks[0].Node != "foo" {
t.Fatalf("Bad: %v", checks)
}
if checks[1].Node != "bar" {
t.Fatalf("Bad: %v", checks)
}
// Now query relative to bar to make sure it shows up first.
node.Source.Node = "bar"
if err := client.Call("Health.ServiceChecks", &node, &out2); err != nil {
t.Fatalf("err: %v", err)
}
checks = out2.HealthChecks
if len(checks) != 2 {
t.Fatalf("Bad: %v", checks)
}
if checks[0].Node != "bar" {
t.Fatalf("Bad: %v", checks)
}
if checks[1].Node != "foo" {
t.Fatalf("Bad: %v", checks)
}
}
func TestHealth_ServiceNodes(t *testing.T) {
dir1, s1 := testServer(t)
defer os.RemoveAll(dir1)
@ -225,6 +391,94 @@ func TestHealth_ServiceNodes(t *testing.T) {
}
}
func TestHealth_ServiceNodes_DistanceSort(t *testing.T) {
dir1, s1 := testServer(t)
defer os.RemoveAll(dir1)
defer s1.Shutdown()
client := rpcClient(t, s1)
defer client.Close()
testutil.WaitForLeader(t, client.Call, "dc1")
if err := s1.fsm.State().EnsureNode(1, structs.Node{"foo", "127.0.0.2"}); err != nil {
t.Fatalf("err: %v", err)
}
if err := s1.fsm.State().EnsureNode(2, structs.Node{"bar", "127.0.0.3"}); err != nil {
t.Fatalf("err: %v", err)
}
updates := []structs.Coordinate{
{"foo", generateCoordinate(1 * time.Millisecond)},
{"bar", generateCoordinate(2 * time.Millisecond)},
}
if err := s1.fsm.State().CoordinateBatchUpdate(3, updates); err != nil {
t.Fatalf("err: %v", err)
}
arg := structs.RegisterRequest{
Datacenter: "dc1",
Node: "foo",
Address: "127.0.0.1",
Service: &structs.NodeService{
ID: "db",
Service: "db",
},
Check: &structs.HealthCheck{
Name: "db connect",
Status: structs.HealthPassing,
ServiceID: "db",
},
}
var out struct{}
if err := client.Call("Catalog.Register", &arg, &out); err != nil {
t.Fatalf("err: %v", err)
}
arg.Node = "bar"
if err := client.Call("Catalog.Register", &arg, &out); err != nil {
t.Fatalf("err: %v", err)
}
// Query relative to foo to make sure it shows up first in the list.
var out2 structs.IndexedCheckServiceNodes
req := structs.ServiceSpecificRequest{
Datacenter: "dc1",
ServiceName: "db",
Source: structs.QuerySource{
Datacenter: "dc1",
Node: "foo",
},
}
if err := client.Call("Health.ServiceNodes", &req, &out2); err != nil {
t.Fatalf("err: %v", err)
}
nodes := out2.Nodes
if len(nodes) != 2 {
t.Fatalf("Bad: %v", nodes)
}
if nodes[0].Node.Node != "foo" {
t.Fatalf("Bad: %v", nodes[0])
}
if nodes[1].Node.Node != "bar" {
t.Fatalf("Bad: %v", nodes[1])
}
// Now query relative to bar to make sure it shows up first.
req.Source.Node = "bar"
if err := client.Call("Health.ServiceNodes", &req, &out2); err != nil {
t.Fatalf("err: %v", err)
}
nodes = out2.Nodes
if len(nodes) != 2 {
t.Fatalf("Bad: %v", nodes)
}
if nodes[0].Node.Node != "bar" {
t.Fatalf("Bad: %v", nodes[0])
}
if nodes[1].Node.Node != "foo" {
t.Fatalf("Bad: %v", nodes[1])
}
}
func TestHealth_NodeChecks_FilterACL(t *testing.T) {
dir, token, srv, codec := testACLFilterServer(t)
defer os.RemoveAll(dir)

82
consul/rtt.go
View file

@ -98,6 +98,84 @@ func (n *serviceNodeSorter) Less(i, j int) bool {
return n.Vec[i] < n.Vec[j]
}
// serviceNodeSorter takes a list of health checks and a parallel vector of
// distances and implements sort.Interface, keeping both structures coherent and
// sorting by distance.
type healthCheckSorter struct {
Checks structs.HealthChecks
Vec []float64
}
// newHealthCheckSorter returns a new sorter for the given source coordinate and
// set of health checks with nodes.
func (s *Server) newHealthCheckSorter(c *coordinate.Coordinate, checks structs.HealthChecks) (sort.Interface, error) {
state := s.fsm.State()
vec := make([]float64, len(checks))
for i, check := range checks {
_, coord, err := state.CoordinateGet(check.Node)
if err != nil {
return nil, err
}
vec[i] = computeDistance(c, coord)
}
return &healthCheckSorter{checks, vec}, nil
}
// See sort.Interface.
func (n *healthCheckSorter) Len() int {
return len(n.Checks)
}
// See sort.Interface.
func (n *healthCheckSorter) Swap(i, j int) {
n.Checks[i], n.Checks[j] = n.Checks[j], n.Checks[i]
n.Vec[i], n.Vec[j] = n.Vec[j], n.Vec[i]
}
// See sort.Interface.
func (n *healthCheckSorter) Less(i, j int) bool {
return n.Vec[i] < n.Vec[j]
}
// checkServiceNodeSorter takes a list of service nodes and a parallel vector of
// distances and implements sort.Interface, keeping both structures coherent and
// sorting by distance.
type checkServiceNodeSorter struct {
Nodes structs.CheckServiceNodes
Vec []float64
}
// newCheckServiceNodeSorter returns a new sorter for the given source coordinate
// and set of nodes with health checks.
func (s *Server) newCheckServiceNodeSorter(c *coordinate.Coordinate, nodes structs.CheckServiceNodes) (sort.Interface, error) {
state := s.fsm.State()
vec := make([]float64, len(nodes))
for i, node := range nodes {
_, coord, err := state.CoordinateGet(node.Node.Node)
if err != nil {
return nil, err
}
vec[i] = computeDistance(c, coord)
}
return &checkServiceNodeSorter{nodes, vec}, nil
}
// See sort.Interface.
func (n *checkServiceNodeSorter) Len() int {
return len(n.Nodes)
}
// See sort.Interface.
func (n *checkServiceNodeSorter) Swap(i, j int) {
n.Nodes[i], n.Nodes[j] = n.Nodes[j], n.Nodes[i]
n.Vec[i], n.Vec[j] = n.Vec[j], n.Vec[i]
}
// See sort.Interface.
func (n *checkServiceNodeSorter) Less(i, j int) bool {
return n.Vec[i] < n.Vec[j]
}
// newSorterByDistanceFrom returns a sorter for the given type.
func (s *Server) newSorterByDistanceFrom(c *coordinate.Coordinate, subj interface{}) (sort.Interface, error) {
switch v := subj.(type) {
@ -105,6 +183,10 @@ func (s *Server) newSorterByDistanceFrom(c *coordinate.Coordinate, subj interfac
return s.newNodeSorter(c, v)
case structs.ServiceNodes:
return s.newServiceNodeSorter(c, v)
case structs.HealthChecks:
return s.newHealthCheckSorter(c, v)
case structs.CheckServiceNodes:
return s.newCheckServiceNodeSorter(c, v)
default:
panic(fmt.Errorf("Unhandled type passed to newSorterByDistanceFrom: %#v", subj))
}

189
consul/rtt_test.go
View file

@ -47,6 +47,32 @@ func verifyServiceNodeSort(t *testing.T, nodes structs.ServiceNodes, expected st
}
}
// 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.
@ -97,7 +123,7 @@ func seedCoordinates(t *testing.T, client *rpc.Client, server *Server) {
time.Sleep(2 * server.config.CoordinateUpdatePeriod)
}
func TestRtt_sortNodesByDistanceFrom_Nodes(t *testing.T) {
func TestRtt_sortNodesByDistanceFrom(t *testing.T) {
dir, server := testServer(t)
defer os.RemoveAll(dir)
defer server.Shutdown()
@ -139,9 +165,48 @@ func TestRtt_sortNodesByDistanceFrom_Nodes(t *testing.T) {
}
verifyNodeSort(t, nodes, "apple,node1,node2,node3,node4,node5")
// Set source to legit values relative to node1 but disable coordinates.
source.Node = "node1"
source.Datacenter = "dc1"
server.config.DisableCoordinates = true
if err := server.sortNodesByDistanceFrom(source, nodes); err != nil {
t.Fatalf("err: %v", err)
}
verifyNodeSort(t, nodes, "apple,node1,node2,node3,node4,node5")
// Now enable coordinates and 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.
server.config.DisableCoordinates = false
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) {
dir, server := testServer(t)
defer os.RemoveAll(dir)
defer server.Shutdown()
client := rpcClient(t, server)
defer client.Close()
testutil.WaitForLeader(t, client.Call, "dc1")
seedCoordinates(t, client, 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 {
@ -187,32 +252,10 @@ func TestRtt_sortNodesByDistanceFrom_ServiceNodes(t *testing.T) {
structs.ServiceNode{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)
}
verifyServiceNodeSort(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)
}
verifyServiceNodeSort(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)
}
verifyServiceNodeSort(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.
var source structs.QuerySource
source.Node = "node1"
source.Datacenter = "dc1"
if err := server.sortNodesByDistanceFrom(source, nodes); err != nil {
@ -239,6 +282,104 @@ func TestRtt_sortNodesByDistanceFrom_ServiceNodes(t *testing.T) {
verifyServiceNodeSort(t, nodes, "node2,node3,node5,node4,node1,apple")
}
func TestRtt_sortNodesByDistanceFrom_HealthChecks(t *testing.T) {
dir, server := testServer(t)
defer os.RemoveAll(dir)
defer server.Shutdown()
client := rpcClient(t, server)
defer client.Close()
testutil.WaitForLeader(t, client.Call, "dc1")
seedCoordinates(t, client, 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) {
dir, server := testServer(t)
defer os.RemoveAll(dir)
defer server.Shutdown()
client := rpcClient(t, server)
defer client.Close()
testutil.WaitForLeader(t, client.Call, "dc1")
seedCoordinates(t, client, 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")
}
// mockNodeMap is keyed by node name and the values are the coordinates of the
// node.
type mockNodeMap map[string]*coordinate.Coordinate

5
consul/structs/structs.go
View file

@ -203,7 +203,7 @@ func (r *DCSpecificRequest) RequestDatacenter() string {
return r.Datacenter
}
// ServiceSpecificRequest is used to query about a specific node
// ServiceSpecificRequest is used to query about a specific service
type ServiceSpecificRequest struct {
Datacenter string
ServiceName string
@ -232,6 +232,7 @@ func (r *NodeSpecificRequest) RequestDatacenter() string {
type ChecksInStateRequest struct {
Datacenter string
State string
Source QuerySource
QueryOptions
}
@ -356,7 +357,7 @@ type HealthCheck struct {
type HealthChecks []*HealthCheck
// CheckServiceNode is used to provide the node, its service
// definition, as well as a HealthCheck that is associated
// definition, as well as a HealthCheck that is associated.
type CheckServiceNode struct {
Node *Node
Service *NodeService

15
website/source/docs/agent/http/health.html.markdown
View file

@ -70,6 +70,11 @@ This endpoint is hit with a GET and returns the checks associated with
the service provided on the path. By default, the datacenter of the agent is queried;
however, the dc can be provided using the "?dc=" query parameter.
Adding the optional "?near=" parameter with a node name will sort
the node list in ascending order based on the estimated round trip
time from that node. Passing "?near=self" will use the agent's local
node for the sort.
It returns a JSON body like this:
```javascript
@ -95,6 +100,11 @@ This endpoint is hit with a GET and returns the nodes providing
the service indicated on the path. By default, the datacenter of the agent is queried;
however, the dc can be provided using the "?dc=" query parameter.
Adding the optional "?near=" parameter with a node name will sort
the node list in ascending order based on the estimated round trip
time from that node. Passing "?near=self" will use the agent's local
node for the sort.
By default, all nodes matching the service are returned. The list can be filtered
by tag using the "?tag=" query parameter.
@ -159,6 +169,11 @@ This endpoint is hit with a GET and returns the checks in the
state provided on the path. By default, the datacenter of the agent is queried;
however, the dc can be provided using the "?dc=" query parameter.
Adding the optional "?near=" parameter with a node name will sort
the node list in ascending order based on the estimated round trip
time from that node. Passing "?near=self" will use the agent's local
node for the sort.
The supported states are `any`, `unknown`, `passing`, `warning`, or `critical`.
The `any` state is a wildcard that can be used to return all checks.