catalog: compare node names case insensitively in more places (#12444)

Many places in consul already treated node names case insensitively.
The state store indexes already do it, but there are a few places that
did a direct byte comparison which have now been corrected.

One place of particular consideration is ensureCheckIfNodeMatches
which is executed during snapshot restore (among other places). If a
node check used a slightly different casing than the casing of the node
during register then the snapshot restore here would deterministically
fail. This has been fixed.

Primary approach:

    git grep -i "node.*[!=]=.*node" -- ':!*_test.go' ':!docs'
    git grep -i '\[[^]]*member[^]]*\]
    git grep -i '\[[^]]*\(member\|name\|node\)[^]]*\]' -- ':!*_test.go' ':!website' ':!ui' ':!agent/proxycfg/testing.go:' ':!*.md'

.changelog/12444.txt

@@ -0,0 +1,7 @@
+```release-note:bug
+catalog: compare node names case insensitively in more places
+```
+
+```release-note:bug
+state: fix bug blocking snapshot restore when a node check and node differed in casing of the node string
+```

agent/catalog_endpoint_test.go

@@ -2,19 +2,21 @@ package agent
 
 import (
 	"fmt"
-	"github.com/hashicorp/consul/api"
 	"net/http"
 	"net/http/httptest"
 	"net/url"
 	"testing"
 	"time"
 
-	"github.com/hashicorp/consul/agent/structs"
+	"github.com/hashicorp/consul/api"
-	"github.com/hashicorp/consul/sdk/testutil/retry"
+
-	"github.com/hashicorp/consul/testrpc"
 	"github.com/hashicorp/serf/coordinate"
 	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/require"
+
+	"github.com/hashicorp/consul/agent/structs"
+	"github.com/hashicorp/consul/sdk/testutil/retry"
+	"github.com/hashicorp/consul/testrpc"
 )
 
 func TestCatalogRegister_Service_InvalidAddress(t *testing.T) {
@@ -412,42 +414,28 @@ func TestCatalogNodes_DistanceSort(t *testing.T) {
 		Address:    "127.0.0.1",
 	}
 	var out struct{}
-	if err := a.RPC("Catalog.Register", args, &out); err != nil {
+	require.NoError(t, a.RPC("Catalog.Register", args, &out))
-		t.Fatalf("err: %v", err)
-	}
 
 	args = &structs.RegisterRequest{
 		Datacenter: "dc1",
 		Node:       "bar",
 		Address:    "127.0.0.2",
 	}
-	if err := a.RPC("Catalog.Register", args, &out); err != nil {
+	require.NoError(t, a.RPC("Catalog.Register", args, &out))
-		t.Fatalf("err: %v", err)
-	}
 
 	// Nobody has coordinates set so this will still return them in the
 	// order they are indexed.
 	req, _ := http.NewRequest("GET", "/v1/catalog/nodes?dc=dc1&near=foo", nil)
 	resp := httptest.NewRecorder()
 	obj, err := a.srv.CatalogNodes(resp, req)
-	if err != nil {
+	require.NoError(t, err)
-		t.Fatalf("err: %v", err)
-	}
 
 	assertIndex(t, resp)
 	nodes := obj.(structs.Nodes)
-	if len(nodes) != 3 {
+	require.Len(t, nodes, 3)
-		t.Fatalf("bad: %v", obj)
+	require.Equal(t, "bar", nodes[0].Node)
-	}
+	require.Equal(t, "foo", nodes[1].Node)
-	if nodes[0].Node != "bar" {
+	require.Equal(t, a.Config.NodeName, nodes[2].Node)
-		t.Fatalf("bad: %v", nodes)
-	}
-	if nodes[1].Node != "foo" {
-		t.Fatalf("bad: %v", nodes)
-	}
-	if nodes[2].Node != a.Config.NodeName {
-		t.Fatalf("bad: %v", nodes)
-	}
 
 	// Send an update for the node and wait for it to get applied.
 	arg := structs.CoordinateUpdateRequest{
@@ -455,33 +443,21 @@ func TestCatalogNodes_DistanceSort(t *testing.T) {
 		Node:       "foo",
 		Coord:      coordinate.NewCoordinate(coordinate.DefaultConfig()),
 	}
-	if err := a.RPC("Coordinate.Update", &arg, &out); err != nil {
+	require.NoError(t, a.RPC("Coordinate.Update", &arg, &out))
-		t.Fatalf("err: %v", err)
-	}
 	time.Sleep(300 * time.Millisecond)
 
 	// Query again and now foo should have moved to the front of the line.
 	req, _ = http.NewRequest("GET", "/v1/catalog/nodes?dc=dc1&near=foo", nil)
 	resp = httptest.NewRecorder()
 	obj, err = a.srv.CatalogNodes(resp, req)
-	if err != nil {
+	require.NoError(t, err)
-		t.Fatalf("err: %v", err)
-	}
 
 	assertIndex(t, resp)
 	nodes = obj.(structs.Nodes)
-	if len(nodes) != 3 {
+	require.Len(t, nodes, 3)
-		t.Fatalf("bad: %v", obj)
+	require.Equal(t, "foo", nodes[0].Node)
-	}
+	require.Equal(t, "bar", nodes[1].Node)
-	if nodes[0].Node != "foo" {
+	require.Equal(t, a.Config.NodeName, nodes[2].Node)
-		t.Fatalf("bad: %v", nodes)
-	}
-	if nodes[1].Node != "bar" {
-		t.Fatalf("bad: %v", nodes)
-	}
-	if nodes[2].Node != a.Config.NodeName {
-		t.Fatalf("bad: %v", nodes)
-	}
 }
 
 func TestCatalogServices(t *testing.T) {

agent/checks/alias.go

@@ -2,6 +2,7 @@ package checks
 
 import (
 	"fmt"
+	"strings"
 	"sync"
 	"time"
 
@@ -246,7 +247,7 @@ func (c *CheckAlias) processChecks(checks []*structs.HealthCheck, CheckIfService
 	msg := "No checks found."
 	serviceFound := false
 	for _, chk := range checks {
-		if c.Node != "" && c.Node != chk.Node {
+		if c.Node != "" && !strings.EqualFold(c.Node, chk.Node) {
 			continue
 		}
 		serviceMatch := c.ServiceID.Matches(chk.CompoundServiceID())

agent/checks/alias_test.go

@@ -454,6 +454,7 @@ func TestCheckAlias_remoteNodeOnlyPassing(t *testing.T) {
 func TestCheckAlias_remoteNodeOnlyCritical(t *testing.T) {
 	t.Parallel()
 
+	run := func(t *testing.T, responseNodeName string) {
 		notify := newMockAliasNotify()
 		chkID := structs.NewCheckID(types.CheckID("foo"), nil)
 		rpc := &mockRPC{}
@@ -475,14 +476,14 @@ func TestCheckAlias_remoteNodeOnlyCritical(t *testing.T) {
 
 				// Should ignore any services
 				{
-				Node:      "remote",
+					Node:      responseNodeName,
 					ServiceID: "db",
 					Status:    api.HealthCritical,
 				},
 
 				// Match
 				{
-				Node:   "remote",
+					Node:   responseNodeName,
 					Status: api.HealthCritical,
 				},
 			},
@@ -495,6 +496,14 @@ func TestCheckAlias_remoteNodeOnlyCritical(t *testing.T) {
 				r.Fatalf("got state %q want %q", got, want)
 			}
 		})
+	}
+
+	t.Run("same case node name", func(t *testing.T) {
+		run(t, "remote")
+	})
+	t.Run("lowercase node name", func(t *testing.T) {
+		run(t, "ReMoTe")
+	})
 }
 
 type mockAliasNotify struct {

agent/consul/catalog_endpoint.go

@@ -3,6 +3,7 @@ package consul
 import (
 	"fmt"
 	"sort"
+	"strings"
 	"time"
 
 	"github.com/armon/go-metrics"
@@ -285,7 +286,7 @@ func vetRegisterWithACL(
 		// note in state_store.go to ban this down there in Consul 0.8,
 		// but it's good to leave this here because it's required for
 		// correctness wrt. ACLs.
-		if check.Node != subj.Node {
+		if !strings.EqualFold(check.Node, subj.Node) {
 			return fmt.Errorf("Node '%s' for check '%s' doesn't match register request node '%s'",
 				check.Node, check.CheckID, subj.Node)
 		}

agent/consul/catalog_endpoint_test.go

@@ -19,6 +19,7 @@ import (
 	"github.com/hashicorp/consul/api"
 	"github.com/hashicorp/consul/lib"
 	"github.com/hashicorp/consul/lib/stringslice"
+	"github.com/hashicorp/consul/sdk/testutil"
 	"github.com/hashicorp/consul/sdk/testutil/retry"
 	"github.com/hashicorp/consul/testrpc"
 	"github.com/hashicorp/consul/types"
@@ -3431,42 +3432,49 @@ service "gateway" {
 }
 
 func TestVetRegisterWithACL(t *testing.T) {
-	t.Parallel()
+	appendAuthz := func(t *testing.T, defaultAuthz acl.Authorizer, rules string) acl.Authorizer {
+		policy, err := acl.NewPolicyFromSource(rules, acl.SyntaxCurrent, nil, nil)
+		require.NoError(t, err)
+
+		authz, err := acl.NewPolicyAuthorizerWithDefaults(defaultAuthz, []*acl.Policy{policy}, nil)
+		require.NoError(t, err)
+
+		return authz
+	}
+
+	t.Run("With an 'allow all' authorizer the update should be allowed", func(t *testing.T) {
 		args := &structs.RegisterRequest{
 			Node:    "nope",
 			Address: "127.0.0.1",
 		}
 
 		// With an "allow all" authorizer the update should be allowed.
-	if err := vetRegisterWithACL(acl.ManageAll(), args, nil); err != nil {
+		require.NoError(t, vetRegisterWithACL(acl.ManageAll(), args, nil))
-		t.Fatalf("err: %v", err)
+	})
+
+	var perms acl.Authorizer = acl.DenyAll()
+
+	args := &structs.RegisterRequest{
+		Node:    "nope",
+		Address: "127.0.0.1",
 	}
 
 	// Create a basic node policy.
-	policy, err := acl.NewPolicyFromSource(`
+	perms = appendAuthz(t, perms, `
-node "node" {
+	node "node" {
 	  policy = "write"
-}
+	} `)
-`, acl.SyntaxLegacy, nil, nil)
-	if err != nil {
-		t.Fatalf("err %v", err)
-	}
-	perms, err := acl.NewPolicyAuthorizerWithDefaults(acl.DenyAll(), []*acl.Policy{policy}, nil)
-	if err != nil {
-		t.Fatalf("err: %v", err)
-	}
 
 	// With that policy, the update should now be blocked for node reasons.
-	err = vetRegisterWithACL(perms, args, nil)
+	err := vetRegisterWithACL(perms, args, nil)
-	if !acl.IsErrPermissionDenied(err) {
+	require.True(t, acl.IsErrPermissionDenied(err))
-		t.Fatalf("bad: %v", err)
-	}
 
 	// Now use a permitted node name.
-	args.Node = "node"
+	args = &structs.RegisterRequest{
-	if err := vetRegisterWithACL(perms, args, nil); err != nil {
+		Node:    "node",
-		t.Fatalf("err: %v", err)
+		Address: "127.0.0.1",
 	}
+	require.NoError(t, vetRegisterWithACL(perms, args, nil))
 
 	// Build some node info that matches what we have now.
 	ns := &structs.NodeServices{
@@ -3478,183 +3486,220 @@ node "node" {
 	}
 
 	// Try to register a service, which should be blocked.
-	args.Service = &structs.NodeService{
+	args = &structs.RegisterRequest{
+		Node:    "node",
+		Address: "127.0.0.1",
+		Service: &structs.NodeService{
 			Service: "service",
 			ID:      "my-id",
+		},
 	}
 	err = vetRegisterWithACL(perms, args, ns)
-	if !acl.IsErrPermissionDenied(err) {
+	require.True(t, acl.IsErrPermissionDenied(err))
-		t.Fatalf("bad: %v", err)
-	}
 
 	// Chain on a basic service policy.
-	policy, err = acl.NewPolicyFromSource(`
+	perms = appendAuthz(t, perms, `
-service "service" {
+	service "service" {
 	  policy = "write"
-}
+	} `)
-`, acl.SyntaxLegacy, nil, nil)
-	if err != nil {
-		t.Fatalf("err %v", err)
-	}
-	perms, err = acl.NewPolicyAuthorizerWithDefaults(perms, []*acl.Policy{policy}, nil)
-	if err != nil {
-		t.Fatalf("err: %v", err)
-	}
 
 	// With the service ACL, the update should go through.
-	if err := vetRegisterWithACL(perms, args, ns); err != nil {
+	require.NoError(t, vetRegisterWithACL(perms, args, ns))
-		t.Fatalf("err: %v", err)
-	}
 
 	// Add an existing service that they are clobbering and aren't allowed
 	// to write to.
-	ns.Services["my-id"] = &structs.NodeService{
+	ns = &structs.NodeServices{
+		Node: &structs.Node{
+			Node:    "node",
+			Address: "127.0.0.1",
+		},
+		Services: map[string]*structs.NodeService{
+			"my-id": {
 				Service: "other",
 				ID:      "my-id",
+			},
+		},
 	}
 	err = vetRegisterWithACL(perms, args, ns)
-	if !acl.IsErrPermissionDenied(err) {
+	require.True(t, acl.IsErrPermissionDenied(err))
-		t.Fatalf("bad: %v", err)
-	}
 
 	// Chain on a policy that allows them to write to the other service.
-	policy, err = acl.NewPolicyFromSource(`
+	perms = appendAuthz(t, perms, `
-service "other" {
+	service "other" {
 	  policy = "write"
-}
+	} `)
-`, acl.SyntaxLegacy, nil, nil)
-	if err != nil {
-		t.Fatalf("err %v", err)
-	}
-	perms, err = acl.NewPolicyAuthorizerWithDefaults(perms, []*acl.Policy{policy}, nil)
-	if err != nil {
-		t.Fatalf("err: %v", err)
-	}
 
 	// Now it should go through.
-	if err := vetRegisterWithACL(perms, args, ns); err != nil {
+	require.NoError(t, vetRegisterWithACL(perms, args, ns))
-		t.Fatalf("err: %v", err)
-	}
 
 	// Try creating the node and the service at once by having no existing
 	// node record. This should be ok since we have node and service
 	// permissions.
-	if err := vetRegisterWithACL(perms, args, nil); err != nil {
+	require.NoError(t, vetRegisterWithACL(perms, args, nil))
-		t.Fatalf("err: %v", err)
-	}
 
 	// Add a node-level check to the member, which should be rejected.
-	args.Check = &structs.HealthCheck{
+	args = &structs.RegisterRequest{
 		Node:    "node",
+		Address: "127.0.0.1",
+		Service: &structs.NodeService{
+			Service: "service",
+			ID:      "my-id",
+		},
+		Check: &structs.HealthCheck{
+			Node: "node",
+		},
 	}
 	err = vetRegisterWithACL(perms, args, ns)
-	if err == nil || !strings.Contains(err.Error(), "check member must be nil") {
+	testutil.RequireErrorContains(t, err, "check member must be nil")
-		t.Fatalf("bad: %v", err)
-	}
 
 	// Move the check into the slice, but give a bad node name.
-	args.Check.Node = "nope"
+	args = &structs.RegisterRequest{
-	args.Checks = append(args.Checks, args.Check)
+		Node:    "node",
-	args.Check = nil
+		Address: "127.0.0.1",
-	err = vetRegisterWithACL(perms, args, ns)
+		Service: &structs.NodeService{
-	if err == nil || !strings.Contains(err.Error(), "doesn't match register request node") {
+			Service: "service",
-		t.Fatalf("bad: %v", err)
+			ID:      "my-id",
+		},
+		Checks: []*structs.HealthCheck{
+			{
+				Node: "nope",
+			},
+		},
 	}
+	err = vetRegisterWithACL(perms, args, ns)
+	testutil.RequireErrorContains(t, err, "doesn't match register request node")
 
 	// Fix the node name, which should now go through.
-	args.Checks[0].Node = "node"
+	args = &structs.RegisterRequest{
-	if err := vetRegisterWithACL(perms, args, ns); err != nil {
+		Node:    "node",
-		t.Fatalf("err: %v", err)
+		Address: "127.0.0.1",
+		Service: &structs.NodeService{
+			Service: "service",
+			ID:      "my-id",
+		},
+		Checks: []*structs.HealthCheck{
+			{
+				Node: "node",
+			},
+		},
 	}
+	require.NoError(t, vetRegisterWithACL(perms, args, ns))
 
 	// Add a service-level check.
-	args.Checks = append(args.Checks, &structs.HealthCheck{
+	args = &structs.RegisterRequest{
+		Node:    "node",
+		Address: "127.0.0.1",
+		Service: &structs.NodeService{
+			Service: "service",
+			ID:      "my-id",
+		},
+		Checks: []*structs.HealthCheck{
+			{
+				Node: "node",
+			},
+			{
 				Node:      "node",
 				ServiceID: "my-id",
-	})
+			},
-	if err := vetRegisterWithACL(perms, args, ns); err != nil {
+		},
-		t.Fatalf("err: %v", err)
 	}
+	require.NoError(t, vetRegisterWithACL(perms, args, ns))
 
 	// Try creating everything at once. This should be ok since we have all
 	// the permissions we need. It also makes sure that we can register a
 	// new node, service, and associated checks.
-	if err := vetRegisterWithACL(perms, args, nil); err != nil {
+	require.NoError(t, vetRegisterWithACL(perms, args, nil))
-		t.Fatalf("err: %v", err)
-	}
 
 	// Nil out the service registration, which'll skip the special case
 	// and force us to look at the ns data (it will look like we are
 	// writing to the "other" service which also has "my-id").
-	args.Service = nil
+	args = &structs.RegisterRequest{
-	if err := vetRegisterWithACL(perms, args, ns); err != nil {
+		Node:    "node",
-		t.Fatalf("err: %v", err)
+		Address: "127.0.0.1",
+		Checks: []*structs.HealthCheck{
+			{
+				Node: "node",
+			},
+			{
+				Node:      "node",
+				ServiceID: "my-id",
+			},
+		},
 	}
+	require.NoError(t, vetRegisterWithACL(perms, args, ns))
 
 	// Chain on a policy that forbids them to write to the other service.
-	policy, err = acl.NewPolicyFromSource(`
+	perms = appendAuthz(t, perms, `
-service "other" {
+	service "other" {
 	  policy = "deny"
-}
+	} `)
-`, acl.SyntaxLegacy, nil, nil)
-	if err != nil {
-		t.Fatalf("err %v", err)
-	}
-	perms, err = acl.NewPolicyAuthorizerWithDefaults(perms, []*acl.Policy{policy}, nil)
-	if err != nil {
-		t.Fatalf("err: %v", err)
-	}
 
 	// This should get rejected.
 	err = vetRegisterWithACL(perms, args, ns)
-	if !acl.IsErrPermissionDenied(err) {
+	require.True(t, acl.IsErrPermissionDenied(err))
-		t.Fatalf("bad: %v", err)
-	}
 
 	// Change the existing service data to point to a service name they
-	// car write to. This should go through.
+	// can write to. This should go through.
-	ns.Services["my-id"] = &structs.NodeService{
+	ns = &structs.NodeServices{
+		Node: &structs.Node{
+			Node:    "node",
+			Address: "127.0.0.1",
+		},
+		Services: map[string]*structs.NodeService{
+			"my-id": {
 				Service: "service",
 				ID:      "my-id",
+			},
+		},
 	}
-	if err := vetRegisterWithACL(perms, args, ns); err != nil {
+	require.NoError(t, vetRegisterWithACL(perms, args, ns))
-		t.Fatalf("err: %v", err)
-	}
 
 	// Chain on a policy that forbids them to write to the node.
-	policy, err = acl.NewPolicyFromSource(`
+	perms = appendAuthz(t, perms, `
-node "node" {
+	node "node" {
 	  policy = "deny"
-}
+	} `)
-`, acl.SyntaxLegacy, nil, nil)
-	if err != nil {
-		t.Fatalf("err %v", err)
-	}
-	perms, err = acl.NewPolicyAuthorizerWithDefaults(perms, []*acl.Policy{policy}, nil)
-	if err != nil {
-		t.Fatalf("err: %v", err)
-	}
 
 	// This should get rejected because there's a node-level check in here.
 	err = vetRegisterWithACL(perms, args, ns)
-	if !acl.IsErrPermissionDenied(err) {
+	require.True(t, acl.IsErrPermissionDenied(err))
-		t.Fatalf("bad: %v", err)
-	}
 
 	// Change the node-level check into a service check, and then it should
 	// go through.
-	args.Checks[0].ServiceID = "my-id"
+	args = &structs.RegisterRequest{
-	if err := vetRegisterWithACL(perms, args, ns); err != nil {
+		Node:    "node",
-		t.Fatalf("err: %v", err)
+		Address: "127.0.0.1",
+		Checks: []*structs.HealthCheck{
+			{
+				Node:      "node",
+				ServiceID: "my-id",
+			},
+			{
+				Node:      "node",
+				ServiceID: "my-id",
+			},
+		},
 	}
+	require.NoError(t, vetRegisterWithACL(perms, args, ns))
 
 	// Finally, attempt to update the node part of the data and make sure
 	// that gets rejected since they no longer have permissions.
-	args.Address = "127.0.0.2"
+	args = &structs.RegisterRequest{
-	err = vetRegisterWithACL(perms, args, ns)
+		Node:    "node",
-	if !acl.IsErrPermissionDenied(err) {
+		Address: "127.0.0.2",
-		t.Fatalf("bad: %v", err)
+		Checks: []*structs.HealthCheck{
+			{
+				Node:      "node",
+				ServiceID: "my-id",
+			},
+			{
+				Node:      "node",
+				ServiceID: "my-id",
+			},
+		},
 	}
+	err = vetRegisterWithACL(perms, args, ns)
+	require.True(t, acl.IsErrPermissionDenied(err))
 }
 
 func TestVetDeregisterWithACL(t *testing.T) {

agent/consul/leader.go

@@ -6,6 +6,7 @@ import (
 	"net"
 	"reflect"
 	"strconv"
+	"strings"
 	"sync"
 	"sync/atomic"
 	"time"
@@ -899,7 +900,7 @@ func (s *Server) reconcileReaped(known map[string]struct{}, nodeEntMeta *structs
 		}
 
 		// Check if this node is "known" by serf
-		if _, ok := known[check.Node]; ok {
+		if _, ok := known[strings.ToLower(check.Node)]; ok {
 			continue
 		}
 
@@ -1204,7 +1205,7 @@ func (s *Server) handleDeregisterMember(reason string, member serf.Member, nodeE
 	// deregister us later.
 	//
 	// TODO(partitions): check partitions here too? server names should be unique in general though
-	if member.Name == s.config.NodeName {
+	if strings.EqualFold(member.Name, s.config.NodeName) {
 		s.logger.Warn("deregistering self should be done by follower",
 			"name", s.config.NodeName,
 			"partition", getSerfMemberEnterpriseMeta(member).PartitionOrDefault(),

agent/consul/leader_test.go

@@ -189,12 +189,8 @@ func TestLeader_LeftMember(t *testing.T) {
 	// Should be registered
 	retry.Run(t, func(r *retry.R) {
 		_, node, err := state.GetNode(c1.config.NodeName, nil)
-		if err != nil {
+		require.NoError(r, err)
-			r.Fatalf("err: %v", err)
+		require.NotNil(r, node, "client not registered")
-		}
-		if node == nil {
-			r.Fatal("client not registered")
-		}
 	})
 
 	// Node should leave
@@ -204,14 +200,11 @@ func TestLeader_LeftMember(t *testing.T) {
 	// Should be deregistered
 	retry.Run(t, func(r *retry.R) {
 		_, node, err := state.GetNode(c1.config.NodeName, nil)
-		if err != nil {
+		require.NoError(r, err)
-			r.Fatalf("err: %v", err)
+		require.Nil(r, node, "client still registered")
-		}
-		if node != nil {
-			r.Fatal("client still registered")
-		}
 	})
 }
+
 func TestLeader_ReapMember(t *testing.T) {
 	if testing.Short() {
 		t.Skip("too slow for testing.Short")
@@ -239,12 +232,8 @@ func TestLeader_ReapMember(t *testing.T) {
 	// Should be registered
 	retry.Run(t, func(r *retry.R) {
 		_, node, err := state.GetNode(c1.config.NodeName, nil)
-		if err != nil {
+		require.NoError(r, err)
-			r.Fatalf("err: %v", err)
+		require.NotNil(r, node, "client not registered")
-		}
-		if node == nil {
-			r.Fatal("client not registered")
-		}
 	})
 
 	// Simulate a node reaping
@@ -264,9 +253,7 @@ func TestLeader_ReapMember(t *testing.T) {
 	reaped := false
 	for start := time.Now(); time.Since(start) < 5*time.Second; {
 		_, node, err := state.GetNode(c1.config.NodeName, nil)
-		if err != nil {
+		require.NoError(t, err)
-			t.Fatalf("err: %v", err)
-		}
 		if node == nil {
 			reaped = true
 			break
@@ -277,6 +264,85 @@ func TestLeader_ReapMember(t *testing.T) {
 	}
 }
 
+func TestLeader_ReapOrLeftMember_IgnoreSelf(t *testing.T) {
+	if testing.Short() {
+		t.Skip("too slow for testing.Short")
+	}
+
+	t.Parallel()
+
+	run := func(t *testing.T, status serf.MemberStatus, nameFn func(string) string) {
+		dir1, s1 := testServerWithConfig(t, func(c *Config) {
+			c.PrimaryDatacenter = "dc1"
+			c.ACLsEnabled = true
+			c.ACLInitialManagementToken = "root"
+			c.ACLResolverSettings.ACLDefaultPolicy = "deny"
+		})
+		defer os.RemoveAll(dir1)
+		defer s1.Shutdown()
+
+		nodeName := s1.config.NodeName
+		if nameFn != nil {
+			nodeName = nameFn(nodeName)
+		}
+
+		state := s1.fsm.State()
+
+		// Should be registered
+		retry.Run(t, func(r *retry.R) {
+			_, node, err := state.GetNode(nodeName, nil)
+			require.NoError(r, err)
+			require.NotNil(r, node, "server not registered")
+		})
+
+		// Simulate THIS node reaping or leaving
+		mems := s1.LANMembersInAgentPartition()
+		var s1mem serf.Member
+		for _, m := range mems {
+			if strings.EqualFold(m.Name, nodeName) {
+				s1mem = m
+				s1mem.Status = status
+				s1mem.Name = nodeName
+				break
+			}
+		}
+		s1.reconcileCh <- s1mem
+
+		// Should NOT be deregistered; we have to poll quickly here because
+		// anti-entropy will put it back if it did get deleted.
+		reaped := false
+		for start := time.Now(); time.Since(start) < 5*time.Second; {
+			_, node, err := state.GetNode(nodeName, nil)
+			require.NoError(t, err)
+			if node == nil {
+				reaped = true
+				break
+			}
+		}
+		if reaped {
+			t.Fatalf("server should still be registered")
+		}
+	}
+
+	t.Run("original name", func(t *testing.T) {
+		t.Run("left", func(t *testing.T) {
+			run(t, serf.StatusLeft, nil)
+		})
+		t.Run("reap", func(t *testing.T) {
+			run(t, StatusReap, nil)
+		})
+	})
+
+	t.Run("uppercased name", func(t *testing.T) {
+		t.Run("left", func(t *testing.T) {
+			run(t, serf.StatusLeft, strings.ToUpper)
+		})
+		t.Run("reap", func(t *testing.T) {
+			run(t, StatusReap, strings.ToUpper)
+		})
+	})
+}
+
 func TestLeader_CheckServersMeta(t *testing.T) {
 	if testing.Short() {
 		t.Skip("too slow for testing.Short")

agent/consul/merge.go

@@ -2,6 +2,7 @@ package consul
 
 import (
 	"fmt"
+	"strings"
 	"sync"
 
 	"github.com/hashicorp/go-version"
@@ -38,7 +39,7 @@ func (md *lanMergeDelegate) NotifyMerge(members []*serf.Member) error {
 			nodeID := types.NodeID(rawID)
 
 			// See if there's another node that conflicts with us.
-			if (nodeID == md.nodeID) && (m.Name != md.nodeName) {
+			if (nodeID == md.nodeID) && !strings.EqualFold(m.Name, md.nodeName) {
 				return fmt.Errorf("Member '%s' has conflicting node ID '%s' with this agent's ID",
 					m.Name, nodeID)
 			}

agent/consul/merge_test.go

@@ -58,6 +58,30 @@ func TestMerge_LAN(t *testing.T) {
 			},
 			expect: "wrong datacenter",
 		},
+		"node ID conflict with delegate's ID but same node name with same casing": {
+			members: []*serf.Member{
+				makeTestNode(t, testMember{
+					dc:     "dc1",
+					name:   "node0",
+					id:     thisNodeID,
+					server: true,
+					build:  "0.7.5",
+				}),
+			},
+			expect: "",
+		},
+		"node ID conflict with delegate's ID but same node name with different casing": {
+			members: []*serf.Member{
+				makeTestNode(t, testMember{
+					dc:     "dc1",
+					name:   "NoDe0",
+					id:     thisNodeID,
+					server: true,
+					build:  "0.7.5",
+				}),
+			},
+			expect: "",
+		},
 		"node ID conflict with delegate's ID": {
 			members: []*serf.Member{
 				makeTestNode(t, testMember{

agent/consul/prepared_query_endpoint.go

@@ -439,7 +439,7 @@ func (p *PreparedQuery) Execute(args *structs.PreparedQueryExecuteRequest,
 	// position 0, provided the results are from the same datacenter.
 	if qs.Node != "" && reply.Datacenter == qs.Datacenter {
 		for i, node := range reply.Nodes {
-			if node.Node.Node == qs.Node {
+			if strings.EqualFold(node.Node.Node, qs.Node) {
 				reply.Nodes[0], reply.Nodes[i] = reply.Nodes[i], reply.Nodes[0]
 				break
 			}

agent/consul/server_oss.go

@@ -5,6 +5,7 @@ package consul
 
 import (
 	"fmt"
+	"strings"
 	"time"
 
 	"github.com/armon/go-metrics"
@@ -138,10 +139,11 @@ func (s *Server) reconcile() (err error) {
 	members := s.serfLAN.Members()
 	knownMembers := make(map[string]struct{})
 	for _, member := range members {
+		memberName := strings.ToLower(member.Name)
 		if err := s.reconcileMember(member); err != nil {
 			return err
 		}
-		knownMembers[member.Name] = struct{}{}
+		knownMembers[memberName] = struct{}{}
 	}
 
 	// Reconcile any members that have been reaped while we were not the

agent/consul/state/catalog.go

@@ -136,7 +136,7 @@ func (s *Store) ensureCheckIfNodeMatches(
 	nodePartition string,
 	check *structs.HealthCheck,
 ) error {
-	if check.Node != node || !structs.EqualPartitions(nodePartition, check.PartitionOrDefault()) {
+	if !strings.EqualFold(check.Node, node) || !structs.EqualPartitions(nodePartition, check.PartitionOrDefault()) {
 		return fmt.Errorf("check node %q does not match node %q",
 			printNodeName(check.Node, check.PartitionOrDefault()),
 			printNodeName(node, nodePartition),
@@ -330,7 +330,7 @@ func (s *Store) ensureNodeTxn(tx WriteTxn, idx uint64, preserveIndexes bool, nod
 		}
 		if existing != nil {
 			n = existing
-			if n.Node != node.Node {
+			if !strings.EqualFold(n.Node, node.Node) {
 				// Lets first get all nodes and check whether name do match, we do not allow clash on nodes without ID
 				dupNameError := ensureNoNodeWithSimilarNameTxn(tx, node, false)
 				if dupNameError != nil {

agent/consul/state/catalog_events.go

@@ -105,7 +105,7 @@ type nodeServiceTuple struct {
 
 func newNodeServiceTupleFromServiceNode(sn *structs.ServiceNode) nodeServiceTuple {
 	return nodeServiceTuple{
-		Node:      sn.Node,
+		Node:      strings.ToLower(sn.Node),
 		ServiceID: sn.ServiceID,
 		EntMeta:   sn.EnterpriseMeta,
 	}
@@ -113,7 +113,7 @@ func newNodeServiceTupleFromServiceNode(sn *structs.ServiceNode) nodeServiceTupl
 
 func newNodeServiceTupleFromServiceHealthCheck(hc *structs.HealthCheck) nodeServiceTuple {
 	return nodeServiceTuple{
-		Node:      hc.Node,
+		Node:      strings.ToLower(hc.Node),
 		ServiceID: hc.ServiceID,
 		EntMeta:   hc.EnterpriseMeta,
 	}

agent/consul/state/catalog_events_oss.go

@@ -3,22 +3,29 @@
 
 package state
 
-import "github.com/hashicorp/consul/agent/structs"
+import (
+	"strings"
+
+	"github.com/hashicorp/consul/agent/structs"
+)
 
 func (nst nodeServiceTuple) nodeTuple() nodeTuple {
-	return nodeTuple{Node: nst.Node, Partition: ""}
+	return nodeTuple{
+		Node:      strings.ToLower(nst.Node),
+		Partition: "",
+	}
 }
 
 func newNodeTupleFromNode(node *structs.Node) nodeTuple {
 	return nodeTuple{
-		Node:      node.Node,
+		Node:      strings.ToLower(node.Node),
 		Partition: "",
 	}
 }
 
 func newNodeTupleFromHealthCheck(hc *structs.HealthCheck) nodeTuple {
 	return nodeTuple{
-		Node:      hc.Node,
+		Node:      strings.ToLower(hc.Node),
 		Partition: "",
 	}
 }

agent/consul/state/catalog_test.go

@@ -471,8 +471,11 @@ func TestStateStore_EnsureRegistration_Restore(t *testing.T) {
 	}
 
 	// Add in a top-level check.
+	//
+	// Verify that node name references in checks are case-insensitive during
+	// restore.
 	req.Check = &structs.HealthCheck{
-		Node:    nodeName,
+		Node:    strings.ToUpper(nodeName),
 		CheckID: "check1",
 		Name:    "check",
 		RaftIndex: structs.RaftIndex{
@@ -499,7 +502,7 @@ func TestStateStore_EnsureRegistration_Restore(t *testing.T) {
 			t.Fatalf("bad: %#v", out)
 		}
 		c := out[0]
-		if c.Node != nodeName || c.CheckID != "check1" || c.Name != "check" ||
+		if c.Node != strings.ToUpper(nodeName) || c.CheckID != "check1" || c.Name != "check" ||
 			c.CreateIndex != 3 || c.ModifyIndex != 3 {
 			t.Fatalf("bad check returned: %#v", c)
 		}
@@ -545,7 +548,7 @@ func TestStateStore_EnsureRegistration_Restore(t *testing.T) {
 			t.Fatalf("bad: %#v", out)
 		}
 		c1 := out[0]
-		if c1.Node != nodeName || c1.CheckID != "check1" || c1.Name != "check" ||
+		if c1.Node != strings.ToUpper(nodeName) || c1.CheckID != "check1" || c1.Name != "check" ||
 			c1.CreateIndex != 3 || c1.ModifyIndex != 3 {
 			t.Fatalf("bad check returned, should not be modified: %#v", c1)
 		}

agent/consul/util.go

@@ -3,6 +3,7 @@ package consul
 import (
 	"runtime"
 	"strconv"
+	"strings"
 
 	"github.com/hashicorp/go-version"
 	"github.com/hashicorp/serf/serf"
@@ -161,7 +162,7 @@ func (c *Client) CheckServers(datacenter string, fn func(*metadata.Server) bool)
 
 func isSerfMember(s *serf.Serf, nodeName string) bool {
 	for _, m := range s.Members() {
-		if m.Name == nodeName {
+		if strings.EqualFold(m.Name, nodeName) {
 			return true
 		}
 	}

agent/structs/structs.go

@@ -452,7 +452,7 @@ func (r *RegisterRequest) ChangesNode(node *Node) bool {
 
 	// Check if any of the node-level fields are being changed.
 	if r.ID != node.ID ||
-		r.Node != node.Node ||
+		!strings.EqualFold(r.Node, node.Node) ||
 		r.PartitionOrDefault() != node.PartitionOrDefault() ||
 		r.Address != node.Address ||
 		r.Datacenter != node.Datacenter ||
@@ -796,7 +796,7 @@ type Nodes []*Node
 // RaftIndex fields.
 func (n *Node) IsSame(other *Node) bool {
 	return n.ID == other.ID &&
-		n.Node == other.Node &&
+		strings.EqualFold(n.Node, other.Node) &&
 		n.PartitionOrDefault() == other.PartitionOrDefault() &&
 		n.Address == other.Address &&
 		n.Datacenter == other.Datacenter &&
@@ -1431,7 +1431,7 @@ func (s *ServiceNode) IsSameService(other *ServiceNode) bool {
 	// TaggedAddresses          map[string]string
 	// NodeMeta                 map[string]string
 	if s.ID != other.ID ||
-		s.Node != other.Node ||
+		!strings.EqualFold(s.Node, other.Node) ||
 		s.ServiceKind != other.ServiceKind ||
 		s.ServiceID != other.ServiceID ||
 		s.ServiceName != other.ServiceName ||
@@ -1675,7 +1675,7 @@ func (t *HealthCheckDefinition) UnmarshalJSON(data []byte) (err error) {
 // useful for seeing if an update would be idempotent for all the functional
 // parts of the structure.
 func (c *HealthCheck) IsSame(other *HealthCheck) bool {
-	if c.Node != other.Node ||
+	if !strings.EqualFold(c.Node, other.Node) ||
 		c.CheckID != other.CheckID ||
 		c.Name != other.Name ||
 		c.Status != other.Status ||

agent/structs/structs_test.go

@@ -73,16 +73,6 @@ func TestStructs_Implements(t *testing.T) {
 }
 
 func TestStructs_RegisterRequest_ChangesNode(t *testing.T) {
-	req := &RegisterRequest{
-		ID:              types.NodeID("40e4a748-2192-161a-0510-9bf59fe950b5"),
-		Node:            "test",
-		Address:         "127.0.0.1",
-		Datacenter:      "dc1",
-		TaggedAddresses: make(map[string]string),
-		NodeMeta: map[string]string{
-			"role": "server",
-		},
-	}
 
 	node := &Node{
 		ID:              types.NodeID("40e4a748-2192-161a-0510-9bf59fe950b5"),
@@ -95,41 +85,104 @@ func TestStructs_RegisterRequest_ChangesNode(t *testing.T) {
 		},
 	}
 
-	check := func(twiddle, restore func()) {
+	type testcase struct {
+		name   string
+		setup  func(*RegisterRequest)
+		expect bool
+	}
+
+	cases := []testcase{
+		{
+			name: "id",
+			setup: func(r *RegisterRequest) {
+				r.ID = "nope"
+			},
+			expect: true,
+		},
+		{
+			name: "name",
+			setup: func(r *RegisterRequest) {
+				r.Node = "nope"
+			},
+			expect: true,
+		},
+		{
+			name: "name casing",
+			setup: func(r *RegisterRequest) {
+				r.Node = "TeSt"
+			},
+			expect: false,
+		},
+		{
+			name: "address",
+			setup: func(r *RegisterRequest) {
+				r.Address = "127.0.0.2"
+			},
+			expect: true,
+		},
+		{
+			name: "dc",
+			setup: func(r *RegisterRequest) {
+				r.Datacenter = "dc2"
+			},
+			expect: true,
+		},
+		{
+			name: "tagged addresses",
+			setup: func(r *RegisterRequest) {
+				r.TaggedAddresses["wan"] = "nope"
+			},
+			expect: true,
+		},
+		{
+			name: "node meta",
+			setup: func(r *RegisterRequest) {
+				r.NodeMeta["invalid"] = "nope"
+			},
+			expect: true,
+		},
+	}
+
+	run := func(t *testing.T, tc testcase) {
+		req := &RegisterRequest{
+			ID:              types.NodeID("40e4a748-2192-161a-0510-9bf59fe950b5"),
+			Node:            "test",
+			Address:         "127.0.0.1",
+			Datacenter:      "dc1",
+			TaggedAddresses: make(map[string]string),
+			NodeMeta: map[string]string{
+				"role": "server",
+			},
+		}
+
 		if req.ChangesNode(node) {
 			t.Fatalf("should not change")
 		}
 
-		twiddle()
+		tc.setup(req)
+
+		if tc.expect {
 			if !req.ChangesNode(node) {
 				t.Fatalf("should change")
 			}
+		} else {
+			if req.ChangesNode(node) {
+				t.Fatalf("should not change")
+			}
+		}
 
+		t.Run("skip node update", func(t *testing.T) {
 			req.SkipNodeUpdate = true
 			if req.ChangesNode(node) {
 				t.Fatalf("should skip")
 			}
-
+		})
-		req.SkipNodeUpdate = false
-		if !req.ChangesNode(node) {
-			t.Fatalf("should change")
 	}
 
-		restore()
+	for _, tc := range cases {
-		if req.ChangesNode(node) {
+		t.Run(tc.name, func(t *testing.T) {
-			t.Fatalf("should not change")
+			run(t, tc)
-		}
+		})
-	}
-
-	check(func() { req.ID = "nope" }, func() { req.ID = types.NodeID("40e4a748-2192-161a-0510-9bf59fe950b5") })
-	check(func() { req.Node = "nope" }, func() { req.Node = "test" })
-	check(func() { req.Address = "127.0.0.2" }, func() { req.Address = "127.0.0.1" })
-	check(func() { req.Datacenter = "dc2" }, func() { req.Datacenter = "dc1" })
-	check(func() { req.TaggedAddresses["wan"] = "nope" }, func() { delete(req.TaggedAddresses, "wan") })
-	check(func() { req.NodeMeta["invalid"] = "nope" }, func() { delete(req.NodeMeta, "invalid") })
-
-	if !req.ChangesNode(nil) {
-		t.Fatalf("should change")
 	}
 }
 
@@ -234,6 +287,65 @@ func TestNode_IsSame(t *testing.T) {
 			ModifyIndex: 2,
 		},
 	}
+
+	type testcase struct {
+		name   string
+		setup  func(*Node)
+		expect bool
+	}
+	cases := []testcase{
+		{
+			name: "id",
+			setup: func(n *Node) {
+				n.ID = types.NodeID("")
+			},
+			expect: false,
+		},
+		{
+			name: "node",
+			setup: func(n *Node) {
+				n.Node = "other"
+			},
+			expect: false,
+		},
+		{
+			name: "node casing",
+			setup: func(n *Node) {
+				n.Node = "MyNoDe1"
+			},
+			expect: true,
+		},
+		{
+			name: "dc",
+			setup: func(n *Node) {
+				n.Datacenter = "dcX"
+			},
+			expect: false,
+		},
+		{
+			name: "address",
+			setup: func(n *Node) {
+				n.Address = "127.0.0.1"
+			},
+			expect: false,
+		},
+		{
+			name: "tagged addresses",
+			setup: func(n *Node) {
+				n.TaggedAddresses = map[string]string{"my": "address"}
+			},
+			expect: false,
+		},
+		{
+			name: "meta",
+			setup: func(n *Node) {
+				n.Meta = map[string]string{"my": "meta"}
+			},
+			expect: false,
+		},
+	}
+
+	run := func(t *testing.T, tc testcase) {
 		other := &Node{
 			ID:              id,
 			Node:            node,
@@ -246,86 +358,157 @@ func TestNode_IsSame(t *testing.T) {
 				ModifyIndex: 3,
 			},
 		}
-	check := func(twiddle, restore func()) {
+
-		t.Helper()
 		if !n.IsSame(other) || !other.IsSame(n) {
 			t.Fatalf("should be the same")
 		}
 
-		twiddle()
+		tc.setup(other)
+
+		if tc.expect {
+			if !n.IsSame(other) || !other.IsSame(n) {
+				t.Fatalf("should be the same")
+			}
+		} else {
 			if n.IsSame(other) || other.IsSame(n) {
 				t.Fatalf("should be different, was %#v VS %#v", n, other)
 			}
-
-		restore()
-		if !n.IsSame(other) || !other.IsSame(n) {
-			t.Fatalf("should be the same")
 		}
 	}
-	check(func() { other.ID = types.NodeID("") }, func() { other.ID = id })
-	check(func() { other.Node = "other" }, func() { other.Node = node })
-	check(func() { other.Datacenter = "dcX" }, func() { other.Datacenter = datacenter })
-	check(func() { other.Address = "127.0.0.1" }, func() { other.Address = address })
-	check(func() { other.TaggedAddresses = map[string]string{"my": "address"} }, func() { other.TaggedAddresses = map[string]string{} })
-	check(func() { other.Meta = map[string]string{"my": "meta"} }, func() { other.Meta = map[string]string{} })
 
-	if !n.IsSame(other) {
+	for _, tc := range cases {
-		t.Fatalf("should be equal, was %#v VS %#v", n, other)
+		t.Run(tc.name, func(t *testing.T) {
+			run(t, tc)
+		})
 	}
 }
 
 func TestStructs_ServiceNode_IsSameService(t *testing.T) {
-	sn := testServiceNode(t)
+	const (
-	node := "node1"
+		nodeName = "node1"
-	serviceID := sn.ServiceID
+	)
-	serviceAddress := sn.ServiceAddress
+
-	serviceEnableTagOverride := sn.ServiceEnableTagOverride
+	type testcase struct {
-	serviceMeta := make(map[string]string)
+		name   string
-	for k, v := range sn.ServiceMeta {
+		setup  func(*ServiceNode)
-		serviceMeta[k] = v
+		expect bool
+	}
+	cases := []testcase{
+		{
+			name: "ServiceID",
+			setup: func(sn *ServiceNode) {
+				sn.ServiceID = "66fb695a-c782-472f-8d36-4f3edd754b37"
+			},
+		},
+		{
+			name: "Node",
+			setup: func(sn *ServiceNode) {
+				sn.Node = "other"
+			},
+		},
+		{
+			name: "Node casing",
+			setup: func(sn *ServiceNode) {
+				sn.Node = "NoDe1"
+			},
+			expect: true,
+		},
+		{
+			name: "ServiceAddress",
+			setup: func(sn *ServiceNode) {
+				sn.ServiceAddress = "1.2.3.4"
+			},
+		},
+		{
+			name: "ServiceEnableTagOverride",
+			setup: func(sn *ServiceNode) {
+				sn.ServiceEnableTagOverride = !sn.ServiceEnableTagOverride
+			},
+		},
+		{
+			name: "ServiceKind",
+			setup: func(sn *ServiceNode) {
+				sn.ServiceKind = "newKind"
+			},
+		},
+		{
+			name: "ServiceMeta",
+			setup: func(sn *ServiceNode) {
+				sn.ServiceMeta = map[string]string{"my": "meta"}
+			},
+		},
+		{
+			name: "ServiceName",
+			setup: func(sn *ServiceNode) {
+				sn.ServiceName = "duck"
+			},
+		},
+		{
+			name: "ServicePort",
+			setup: func(sn *ServiceNode) {
+				sn.ServicePort = 65534
+			},
+		},
+		{
+			name: "ServiceTags",
+			setup: func(sn *ServiceNode) {
+				sn.ServiceTags = []string{"new", "tags"}
+			},
+		},
+		{
+			name: "ServiceWeights",
+			setup: func(sn *ServiceNode) {
+				sn.ServiceWeights = Weights{Passing: 42, Warning: 41}
+			},
+		},
+		{
+			name: "ServiceProxy",
+			setup: func(sn *ServiceNode) {
+				sn.ServiceProxy = ConnectProxyConfig{}
+			},
+		},
+		{
+			name: "ServiceConnect",
+			setup: func(sn *ServiceNode) {
+				sn.ServiceConnect = ServiceConnect{}
+			},
+		},
+		{
+			name: "ServiceTaggedAddresses",
+			setup: func(sn *ServiceNode) {
+				sn.ServiceTaggedAddresses = nil
+			},
+		},
 	}
-	serviceName := sn.ServiceName
-	servicePort := sn.ServicePort
-	serviceTags := sn.ServiceTags
-	serviceWeights := Weights{Passing: 2, Warning: 1}
-	sn.ServiceWeights = serviceWeights
-	serviceProxy := sn.ServiceProxy
-	serviceConnect := sn.ServiceConnect
-	serviceTaggedAddresses := sn.ServiceTaggedAddresses
 
-	n := sn.ToNodeService().ToServiceNode(node)
+	run := func(t *testing.T, tc testcase) {
-	other := sn.ToNodeService().ToServiceNode(node)
+		sn := testServiceNode(t)
+		sn.ServiceWeights = Weights{Passing: 2, Warning: 1}
+		n := sn.ToNodeService().ToServiceNode(nodeName)
+		other := sn.ToNodeService().ToServiceNode(nodeName)
 
-	check := func(twiddle, restore func()) {
-		t.Helper()
 		if !n.IsSameService(other) || !other.IsSameService(n) {
 			t.Fatalf("should be the same")
 		}
 
-		twiddle()
+		tc.setup(other)
+
+		if tc.expect {
+			if !n.IsSameService(other) || !other.IsSameService(n) {
+				t.Fatalf("should be the same")
+			}
+		} else {
 			if n.IsSameService(other) || other.IsSameService(n) {
 				t.Fatalf("should be different, was %#v VS %#v", n, other)
 			}
-
-		restore()
-		if !n.IsSameService(other) || !other.IsSameService(n) {
-			t.Fatalf("should be the same after restore, was:\n %#v VS\n %#v", n, other)
 		}
 	}
 
-	check(func() { other.ServiceID = "66fb695a-c782-472f-8d36-4f3edd754b37" }, func() { other.ServiceID = serviceID })
+	for _, tc := range cases {
-	check(func() { other.Node = "other" }, func() { other.Node = node })
+		t.Run(tc.name, func(t *testing.T) {
-	check(func() { other.ServiceAddress = "1.2.3.4" }, func() { other.ServiceAddress = serviceAddress })
+			run(t, tc)
-	check(func() { other.ServiceEnableTagOverride = !serviceEnableTagOverride }, func() { other.ServiceEnableTagOverride = serviceEnableTagOverride })
+		})
-	check(func() { other.ServiceKind = "newKind" }, func() { other.ServiceKind = "" })
+	}
-	check(func() { other.ServiceMeta = map[string]string{"my": "meta"} }, func() { other.ServiceMeta = serviceMeta })
-	check(func() { other.ServiceName = "duck" }, func() { other.ServiceName = serviceName })
-	check(func() { other.ServicePort = 65534 }, func() { other.ServicePort = servicePort })
-	check(func() { other.ServiceTags = []string{"new", "tags"} }, func() { other.ServiceTags = serviceTags })
-	check(func() { other.ServiceWeights = Weights{Passing: 42, Warning: 41} }, func() { other.ServiceWeights = serviceWeights })
-	check(func() { other.ServiceProxy = ConnectProxyConfig{} }, func() { other.ServiceProxy = serviceProxy })
-	check(func() { other.ServiceConnect = ServiceConnect{} }, func() { other.ServiceConnect = serviceConnect })
-	check(func() { other.ServiceTaggedAddresses = nil }, func() { other.ServiceTaggedAddresses = serviceTaggedAddresses })
 }
 
 func TestStructs_ServiceNode_PartialClone(t *testing.T) {
@@ -1175,6 +1358,71 @@ func TestStructs_NodeService_IsSame(t *testing.T) {
 }
 
 func TestStructs_HealthCheck_IsSame(t *testing.T) {
+	type testcase struct {
+		name   string
+		setup  func(*HealthCheck)
+		expect bool
+	}
+
+	cases := []testcase{
+		{
+			name: "Node",
+			setup: func(hc *HealthCheck) {
+				hc.Node = "XXX"
+			},
+		},
+		{
+			name: "Node casing",
+			setup: func(hc *HealthCheck) {
+				hc.Node = "NoDe1"
+			},
+			expect: true,
+		},
+		{
+			name: "CheckID",
+			setup: func(hc *HealthCheck) {
+				hc.CheckID = "XXX"
+			},
+		},
+		{
+			name: "Name",
+			setup: func(hc *HealthCheck) {
+				hc.Name = "XXX"
+			},
+		},
+		{
+			name: "Status",
+			setup: func(hc *HealthCheck) {
+				hc.Status = "XXX"
+			},
+		},
+		{
+			name: "Notes",
+			setup: func(hc *HealthCheck) {
+				hc.Notes = "XXX"
+			},
+		},
+		{
+			name: "Output",
+			setup: func(hc *HealthCheck) {
+				hc.Output = "XXX"
+			},
+		},
+		{
+			name: "ServiceID",
+			setup: func(hc *HealthCheck) {
+				hc.ServiceID = "XXX"
+			},
+		},
+		{
+			name: "ServiceName",
+			setup: func(hc *HealthCheck) {
+				hc.ServiceName = "XXX"
+			},
+		},
+	}
+
+	run := func(t *testing.T, tc testcase) {
 		hc := &HealthCheck{
 			Node:        "node1",
 			CheckID:     "check1",
@@ -1186,6 +1434,7 @@ func TestStructs_HealthCheck_IsSame(t *testing.T) {
 			ServiceName: "theservice",
 			ServiceTags: []string{"foo"},
 		}
+
 		if !hc.IsSame(hc) {
 			t.Fatalf("should be equal to itself")
 		}
@@ -1205,52 +1454,29 @@ func TestStructs_HealthCheck_IsSame(t *testing.T) {
 				ModifyIndex: 2,
 			},
 		}
+
 		if !hc.IsSame(other) || !other.IsSame(hc) {
 			t.Fatalf("should not care about Raft fields")
 		}
 
-	checkCheckIDField := func(field *types.CheckID) {
+		tc.setup(hc)
+
+		if tc.expect {
 			if !hc.IsSame(other) || !other.IsSame(hc) {
 				t.Fatalf("should be the same")
 			}
-
+		} else {
-		old := *field
-		*field = "XXX"
 			if hc.IsSame(other) || other.IsSame(hc) {
 				t.Fatalf("should not be the same")
 			}
-		*field = old
-
-		if !hc.IsSame(other) || !other.IsSame(hc) {
-			t.Fatalf("should be the same")
 		}
 	}
 
-	checkStringField := func(field *string) {
+	for _, tc := range cases {
-		if !hc.IsSame(other) || !other.IsSame(hc) {
+		t.Run(tc.name, func(t *testing.T) {
-			t.Fatalf("should be the same")
+			run(t, tc)
+		})
 	}
-
-		old := *field
-		*field = "XXX"
-		if hc.IsSame(other) || other.IsSame(hc) {
-			t.Fatalf("should not be the same")
-		}
-		*field = old
-
-		if !hc.IsSame(other) || !other.IsSame(hc) {
-			t.Fatalf("should be the same")
-		}
-	}
-
-	checkStringField(&other.Node)
-	checkCheckIDField(&other.CheckID)
-	checkStringField(&other.Name)
-	checkStringField(&other.Status)
-	checkStringField(&other.Notes)
-	checkStringField(&other.Output)
-	checkStringField(&other.ServiceID)
-	checkStringField(&other.ServiceName)
 }
 
 func TestStructs_HealthCheck_Marshalling(t *testing.T) {

command/rtt/rtt.go

@@ -103,11 +103,11 @@ func (c *cmd) Run(args []string) int {
 		var area1, area2 string
 		for _, dc := range dcs {
 			for _, entry := range dc.Coordinates {
-				if dc.Datacenter == dc1 && entry.Node == node1 {
+				if dc.Datacenter == dc1 && strings.EqualFold(entry.Node, node1) {
 					area1 = dc.AreaID
 					coord1 = entry.Coord
 				}
-				if dc.Datacenter == dc2 && entry.Node == node2 {
+				if dc.Datacenter == dc2 && strings.EqualFold(entry.Node, node2) {
 					area2 = dc.AreaID
 					coord2 = entry.Coord
 				}
@@ -145,10 +145,10 @@ func (c *cmd) Run(args []string) int {
 		// Index all the coordinates by segment.
 		cs1, cs2 := make(lib.CoordinateSet), make(lib.CoordinateSet)
 		for _, entry := range entries {
-			if entry.Node == nodes[0] {
+			if strings.EqualFold(entry.Node, nodes[0]) {
 				cs1[entry.Segment] = entry.Coord
 			}
-			if entry.Node == nodes[1] {
+			if strings.EqualFold(entry.Node, nodes[1]) {
 				cs2[entry.Segment] = entry.Coord
 			}
 		}

command/rtt/rtt_test.go

@@ -7,11 +7,12 @@ import (
 
 	"github.com/hashicorp/consul/testrpc"
 
+	"github.com/hashicorp/serf/coordinate"
+	"github.com/mitchellh/cli"
+
 	"github.com/hashicorp/consul/agent"
 	"github.com/hashicorp/consul/agent/structs"
 	"github.com/hashicorp/consul/sdk/testutil/retry"
-	"github.com/hashicorp/serf/coordinate"
-	"github.com/mitchellh/cli"
 )
 
 func TestRTTCommand_noTabs(t *testing.T) {
@@ -167,11 +168,15 @@ func TestRTTCommand_WAN(t *testing.T) {
 	defer a.Shutdown()
 	testrpc.WaitForLeader(t, a.RPC, "dc1")
 
-	node := fmt.Sprintf("%s.%s", a.Config.NodeName, a.Config.Datacenter)
+	var (
+		node      = fmt.Sprintf("%s.%s", a.Config.NodeName, a.Config.Datacenter)
+		nodeUpper = fmt.Sprintf("%s.%s", strings.ToUpper(a.Config.NodeName), a.Config.Datacenter)
+		nodeLower = fmt.Sprintf("%s.%s", strings.ToLower(a.Config.NodeName), a.Config.Datacenter)
+	)
 
 	// We can't easily inject WAN coordinates, so we will just query the
 	// node with itself.
-	{
+	t.Run("query self", func(t *testing.T) {
 		ui := cli.NewMockUi()
 		c := New(ui)
 		args := []string{
@@ -189,10 +194,30 @@ func TestRTTCommand_WAN(t *testing.T) {
 		if !strings.Contains(ui.OutputWriter.String(), "rtt: ") {
 			t.Fatalf("bad: %#v", ui.OutputWriter.String())
 		}
+	})
+
+	t.Run("query self with case differences", func(t *testing.T) {
+		ui := cli.NewMockUi()
+		c := New(ui)
+		args := []string{
+			"-wan",
+			"-http-addr=" + a.HTTPAddr(),
+			nodeLower,
+			nodeUpper,
+		}
+		code := c.Run(args)
+		if code != 0 {
+			t.Log(ui.OutputWriter.String())
+			t.Fatalf("bad: %d: %#v", code, ui.ErrorWriter.String())
 		}
 
-	// Default to the agent's node.
+		// Make sure there was some kind of RTT reported in the output.
-	{
+		if !strings.Contains(ui.OutputWriter.String(), "rtt: ") {
+			t.Fatalf("bad: %#v", ui.OutputWriter.String())
+		}
+	})
+
+	t.Run("default to the agent's node", func(t *testing.T) {
 		ui := cli.NewMockUi()
 		c := New(ui)
 		args := []string{
@@ -209,10 +234,9 @@ func TestRTTCommand_WAN(t *testing.T) {
 		if !strings.Contains(ui.OutputWriter.String(), "rtt: ") {
 			t.Fatalf("bad: %#v", ui.OutputWriter.String())
 		}
-	}
+	})
 
-	// Try an unknown node.
+	t.Run("try an unknown node", func(t *testing.T) {
-	{
 		ui := cli.NewMockUi()
 		c := New(ui)
 		args := []string{
@@ -225,5 +249,5 @@ func TestRTTCommand_WAN(t *testing.T) {
 		if code != 1 {
 			t.Fatalf("bad: %d: %#v", code, ui.ErrorWriter.String())
 		}
-	}
+	})
 }