diff --git a/agent/dns_test.go b/agent/dns_test.go index 2ac6306255..4823820f6b 100644 --- a/agent/dns_test.go +++ b/agent/dns_test.go @@ -9,6 +9,7 @@ import ( "testing" "time" + require "github.com/stretchr/testify/require" "github.com/hashicorp/consul/agent/config" "github.com/hashicorp/consul/agent/structs" "github.com/hashicorp/consul/api" @@ -16,6 +17,7 @@ import ( "github.com/hashicorp/consul/testutil/retry" "github.com/miekg/dns" "github.com/pascaldekloe/goe/verify" + "github.com/hashicorp/serf/coordinate" ) const ( @@ -1835,6 +1837,124 @@ func TestDNS_ServiceLookup_TagPeriod(t *testing.T) { } } +func TestDNS_PreparedQueryNearIP(t *testing.T) { + ipCoord := lib.GenerateCoordinate(1 * time.Millisecond) + serviceNodes := []struct{ + name string + address string + coord *coordinate.Coordinate + }{ + {"foo1", "198.18.0.1", lib.GenerateCoordinate(1 * time.Millisecond),}, + {"foo2", "198.18.0.2", lib.GenerateCoordinate(10 * time.Millisecond),}, + {"foo3", "198.18.0.3", lib.GenerateCoordinate(30 * time.Millisecond),}, + } + + t.Parallel() + a := NewTestAgent(t.Name(), "") + defer a.Shutdown() + + added := 0 + + // Register nodes with a service + for _, cfg := range serviceNodes { + args := &structs.RegisterRequest{ + Datacenter: "dc1", + Node: cfg.name, + Address: cfg.address, + Service: &structs.NodeService{ + Service: "db", + Port: 12345, + }, + } + + var out struct{} + err := a.RPC("Catalog.Register", args, &out) + require.NoError(t, err) + + // Send coordinate updates + coordArgs := structs.CoordinateUpdateRequest{ + Datacenter: "dc1", + Node: cfg.name, + Coord: cfg.coord, + } + err = a.RPC("Coordinate.Update", &coordArgs, &out) + require.NoError(t, err) + + added += 1 + } + + fmt.Printf("Added %d service nodes\n", added) + + // Register a node without a service + { + args := &structs.RegisterRequest{ + Datacenter: "dc1", + Node: "bar", + Address: "198.18.0.9", + } + + var out struct{} + err := a.RPC("Catalog.Register", args, &out) + require.NoError(t, err) + + // Send coordinate updates for a few nodes. + coordArgs := structs.CoordinateUpdateRequest{ + Datacenter: "dc1", + Node: "bar", + Coord: ipCoord, + } + err = a.RPC("Coordinate.Update", &coordArgs, &out) + require.NoError(t, err) + } + + // Register a prepared query Near = _ip + { + args := &structs.PreparedQueryRequest{ + Datacenter: "dc1", + Op: structs.PreparedQueryCreate, + Query: &structs.PreparedQuery{ + Name: "some.query.we.like", + Service: structs.ServiceQuery{ + Service: "db", + Near: "_ip", + }, + }, + } + + var id string + err := a.RPC("PreparedQuery.Apply", args, &id) + require.NoError(t, err) + } + + m :=new(dns.Msg) + m.SetQuestion("some.query.we.like.query.consul.", dns.TypeA) + m.SetEdns0(4096, false) + o := new(dns.OPT) + o.Hdr.Name = "." + o.Hdr.Rrtype = dns.TypeOPT + e := new(dns.EDNS0_SUBNET) + e.Code = dns.EDNS0SUBNET + e.Family = 1 + e.SourceNetmask = 32 + e.SourceScope = 0 + e.Address = net.ParseIP("198.18.0.9").To4() + o.Option = append(o.Option, e) + m.Extra = append(m.Extra, o) + + c := new(dns.Client) + in, _, err := c.Exchange(m, a.DNSAddr()) + require.NoErrorf(t, err, "Error with call to dns.Client.Exchange: %s", err) + + require.Equalf(t, len(serviceNodes), len(in.Answer), "Expecting %d A RRs in response, Actual found was %d", len(serviceNodes), len(in.Answer)) + + for i, rr := range in.Answer { + aRec, ok := rr.(*dns.A); + require.Truef(t, ok, "DNS Answer contained a non A RR") + actual := aRec.A.String() + require.Equalf(t, serviceNodes[i].address, actual, "Expecting A RR #%d = %s, Actual RR was %s", i, serviceNodes[i].address, actual) + } +} + func TestDNS_ServiceLookup_PreparedQueryNamePeriod(t *testing.T) { t.Parallel() a := NewTestAgent(t.Name(), "")