cmd/stdiscosrv: New discovery server (fixes #4618)

This is a new revision of the discovery server. Relevant changes and non-changes: - Protocol towards clients is unchanged. - Recommended large scale design is still to be deployed nehind nginx (I tested, and it's still a lot faster at terminating TLS). - Database backend is leveldb again, only. It scales enough, is easy to setup, and we don't need any backend to take care of. - Server supports replication. This is a simple TCP channel - protect it with a firewall when deploying over the internet. (We deploy this within the same datacenter, and with firewall.) Any incoming client announces are sent over the replication channel(s) to other peer discosrvs. Incoming replication changes are applied to the database as if they came from clients, but without the TLS/certificate overhead. - Metrics are exposed using the prometheus library, when enabled. - The database values and replication protocol is protobuf, because JSON was quite CPU intensive when I tried that and benchmarked it. - The "Retry-After" value for failed lookups gets slowly increased from a default of 120 seconds, by 5 seconds for each failed lookup, independently by each discosrv. This lowers the query load over time for clients that are never seen. The Retry-After maxes out at 3600 after a couple of weeks of this increase. The number of failed lookups is stored in the database, now and then (avoiding making each lookup a database put). All in all this means clients can be pointed towards a cluster using just multiple A / AAAA records to gain both load sharing and redundancy (if one is down, clients will talk to the remaining ones). GitHub-Pull-Request: https://github.com/syncthing/syncthing/pull/4648
2018-01-14 08:52:31 +00:00
parent 341b9691a7
commit 916ec63af6
864 changed files with 216825 additions and 64540 deletions
--- a/vendor/github.com/gogo/protobuf/test/indeximport-issue72/Makefile
+++ b/vendor/github.com/gogo/protobuf/test/indeximport-issue72/Makefile
@@ -0,0 +1,31 @@
+# Protocol Buffers for Go with Gadgets
+#
+# Copyright (c) 2013, The GoGo Authors. All rights reserved.
+# http://github.com/gogo/protobuf
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following disclaimer
+# in the documentation and/or other materials provided with the
+# distribution.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+regenerate:
+	(cd index && protoc --proto_path=../../../../../../:../../../protobuf/:. --gogo_out=. index.proto)
+	(protoc --proto_path=../../../../../:../../protobuf/:. --gogo_out=. indeximport.proto)
--- a/vendor/github.com/gogo/protobuf/test/indeximport-issue72/index/index.proto
+++ b/vendor/github.com/gogo/protobuf/test/indeximport-issue72/index/index.proto
@@ -0,0 +1,45 @@
+// Protocol Buffers for Go with Gadgets
+//
+// Copyright (c) 2015, The GoGo Authors. All rights reserved.
+// http://github.com/gogo/protobuf
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+syntax = "proto2";
+
+package index;
+
+import "github.com/gogo/protobuf/gogoproto/gogo.proto";
+
+option (gogoproto.marshaler_all) = true;
+option (gogoproto.sizer_all) = true;
+option (gogoproto.unmarshaler_all) = true;
+option (gogoproto.populate_all) = true;
+option (gogoproto.equal_all) = true;
+option (gogoproto.testgen_all) = true;
+
+message IndexQuery {
+	optional string Key = 1;
+	optional string Value = 2;
+}
--- a/vendor/github.com/gogo/protobuf/test/indeximport-issue72/index/indexpb_test.go
+++ b/vendor/github.com/gogo/protobuf/test/indeximport-issue72/index/indexpb_test.go
@@ -0,0 +1,153 @@
+// Code generated by protoc-gen-gogo. DO NOT EDIT.
+// source: index.proto
+
+/*
+Package index is a generated protocol buffer package.
+
+It is generated from these files:
+	index.proto
+
+It has these top-level messages:
+	IndexQuery
+*/
+package index
+
+import testing "testing"
+import rand "math/rand"
+import time "time"
+import proto "github.com/gogo/protobuf/proto"
+import jsonpb "github.com/gogo/protobuf/jsonpb"
+import fmt "fmt"
+import math "math"
+import _ "github.com/gogo/protobuf/gogoproto"
+
+// Reference imports to suppress errors if they are not otherwise used.
+var _ = proto.Marshal
+var _ = fmt.Errorf
+var _ = math.Inf
+
+func TestIndexQueryProto(t *testing.T) {
+	seed := time.Now().UnixNano()
+	popr := rand.New(rand.NewSource(seed))
+	p := NewPopulatedIndexQuery(popr, false)
+	dAtA, err := proto.Marshal(p)
+	if err != nil {
+		t.Fatalf("seed = %d, err = %v", seed, err)
+	}
+	msg := &IndexQuery{}
+	if err := proto.Unmarshal(dAtA, msg); err != nil {
+		t.Fatalf("seed = %d, err = %v", seed, err)
+	}
+	littlefuzz := make([]byte, len(dAtA))
+	copy(littlefuzz, dAtA)
+	for i := range dAtA {
+		dAtA[i] = byte(popr.Intn(256))
+	}
+	if !p.Equal(msg) {
+		t.Fatalf("seed = %d, %#v !Proto %#v", seed, msg, p)
+	}
+	if len(littlefuzz) > 0 {
+		fuzzamount := 100
+		for i := 0; i < fuzzamount; i++ {
+			littlefuzz[popr.Intn(len(littlefuzz))] = byte(popr.Intn(256))
+			littlefuzz = append(littlefuzz, byte(popr.Intn(256)))
+		}
+		// shouldn't panic
+		_ = proto.Unmarshal(littlefuzz, msg)
+	}
+}
+
+func TestIndexQueryMarshalTo(t *testing.T) {
+	seed := time.Now().UnixNano()
+	popr := rand.New(rand.NewSource(seed))
+	p := NewPopulatedIndexQuery(popr, false)
+	size := p.Size()
+	dAtA := make([]byte, size)
+	for i := range dAtA {
+		dAtA[i] = byte(popr.Intn(256))
+	}
+	_, err := p.MarshalTo(dAtA)
+	if err != nil {
+		t.Fatalf("seed = %d, err = %v", seed, err)
+	}
+	msg := &IndexQuery{}
+	if err := proto.Unmarshal(dAtA, msg); err != nil {
+		t.Fatalf("seed = %d, err = %v", seed, err)
+	}
+	for i := range dAtA {
+		dAtA[i] = byte(popr.Intn(256))
+	}
+	if !p.Equal(msg) {
+		t.Fatalf("seed = %d, %#v !Proto %#v", seed, msg, p)
+	}
+}
+
+func TestIndexQueryJSON(t *testing.T) {
+	seed := time.Now().UnixNano()
+	popr := rand.New(rand.NewSource(seed))
+	p := NewPopulatedIndexQuery(popr, true)
+	marshaler := jsonpb.Marshaler{}
+	jsondata, err := marshaler.MarshalToString(p)
+	if err != nil {
+		t.Fatalf("seed = %d, err = %v", seed, err)
+	}
+	msg := &IndexQuery{}
+	err = jsonpb.UnmarshalString(jsondata, msg)
+	if err != nil {
+		t.Fatalf("seed = %d, err = %v", seed, err)
+	}
+	if !p.Equal(msg) {
+		t.Fatalf("seed = %d, %#v !Json Equal %#v", seed, msg, p)
+	}
+}
+func TestIndexQueryProtoText(t *testing.T) {
+	seed := time.Now().UnixNano()
+	popr := rand.New(rand.NewSource(seed))
+	p := NewPopulatedIndexQuery(popr, true)
+	dAtA := proto.MarshalTextString(p)
+	msg := &IndexQuery{}
+	if err := proto.UnmarshalText(dAtA, msg); err != nil {
+		t.Fatalf("seed = %d, err = %v", seed, err)
+	}
+	if !p.Equal(msg) {
+		t.Fatalf("seed = %d, %#v !Proto %#v", seed, msg, p)
+	}
+}
+
+func TestIndexQueryProtoCompactText(t *testing.T) {
+	seed := time.Now().UnixNano()
+	popr := rand.New(rand.NewSource(seed))
+	p := NewPopulatedIndexQuery(popr, true)
+	dAtA := proto.CompactTextString(p)
+	msg := &IndexQuery{}
+	if err := proto.UnmarshalText(dAtA, msg); err != nil {
+		t.Fatalf("seed = %d, err = %v", seed, err)
+	}
+	if !p.Equal(msg) {
+		t.Fatalf("seed = %d, %#v !Proto %#v", seed, msg, p)
+	}
+}
+
+func TestIndexQuerySize(t *testing.T) {
+	seed := time.Now().UnixNano()
+	popr := rand.New(rand.NewSource(seed))
+	p := NewPopulatedIndexQuery(popr, true)
+	size2 := proto.Size(p)
+	dAtA, err := proto.Marshal(p)
+	if err != nil {
+		t.Fatalf("seed = %d, err = %v", seed, err)
+	}
+	size := p.Size()
+	if len(dAtA) != size {
+		t.Errorf("seed = %d, size %v != marshalled size %v", seed, size, len(dAtA))
+	}
+	if size2 != size {
+		t.Errorf("seed = %d, size %v != before marshal proto.Size %v", seed, size, size2)
+	}
+	size3 := proto.Size(p)
+	if size3 != size {
+		t.Errorf("seed = %d, size %v != after marshal proto.Size %v", seed, size, size3)
+	}
+}
+
+//These tests are generated by github.com/gogo/protobuf/plugin/testgen
--- a/vendor/github.com/gogo/protobuf/test/indeximport-issue72/indeximport.proto
+++ b/vendor/github.com/gogo/protobuf/test/indeximport-issue72/indeximport.proto
@@ -0,0 +1,46 @@
+// Protocol Buffers for Go with Gadgets
+//
+// Copyright (c) 2015, The GoGo Authors. All rights reserved.
+// http://github.com/gogo/protobuf
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+syntax = "proto2";
+
+package indeximport;
+
+import "github.com/gogo/protobuf/test/indeximport-issue72/index/index.proto";
+import "github.com/gogo/protobuf/gogoproto/gogo.proto";
+
+option (gogoproto.marshaler_all) = true;
+option (gogoproto.sizer_all) = true;
+option (gogoproto.unmarshaler_all) = true;
+option (gogoproto.populate_all) = true;
+option (gogoproto.equal_all) = true;
+option (gogoproto.testgen_all) = true;
+
+message IndexQueries {
+	repeated index.IndexQuery Queries = 1;
+}
+
--- a/vendor/github.com/gogo/protobuf/test/indeximport-issue72/indeximportpb_test.go
+++ b/vendor/github.com/gogo/protobuf/test/indeximport-issue72/indeximportpb_test.go
@@ -0,0 +1,154 @@
+// Code generated by protoc-gen-gogo. DO NOT EDIT.
+// source: indeximport.proto
+
+/*
+Package indeximport is a generated protocol buffer package.
+
+It is generated from these files:
+	indeximport.proto
+
+It has these top-level messages:
+	IndexQueries
+*/
+package indeximport
+
+import testing "testing"
+import rand "math/rand"
+import time "time"
+import proto "github.com/gogo/protobuf/proto"
+import jsonpb "github.com/gogo/protobuf/jsonpb"
+import fmt "fmt"
+import math "math"
+import _ "github.com/gogo/protobuf/test/indeximport-issue72/index"
+import _ "github.com/gogo/protobuf/gogoproto"
+
+// Reference imports to suppress errors if they are not otherwise used.
+var _ = proto.Marshal
+var _ = fmt.Errorf
+var _ = math.Inf
+
+func TestIndexQueriesProto(t *testing.T) {
+	seed := time.Now().UnixNano()
+	popr := rand.New(rand.NewSource(seed))
+	p := NewPopulatedIndexQueries(popr, false)
+	dAtA, err := proto.Marshal(p)
+	if err != nil {
+		t.Fatalf("seed = %d, err = %v", seed, err)
+	}
+	msg := &IndexQueries{}
+	if err := proto.Unmarshal(dAtA, msg); err != nil {
+		t.Fatalf("seed = %d, err = %v", seed, err)
+	}
+	littlefuzz := make([]byte, len(dAtA))
+	copy(littlefuzz, dAtA)
+	for i := range dAtA {
+		dAtA[i] = byte(popr.Intn(256))
+	}
+	if !p.Equal(msg) {
+		t.Fatalf("seed = %d, %#v !Proto %#v", seed, msg, p)
+	}
+	if len(littlefuzz) > 0 {
+		fuzzamount := 100
+		for i := 0; i < fuzzamount; i++ {
+			littlefuzz[popr.Intn(len(littlefuzz))] = byte(popr.Intn(256))
+			littlefuzz = append(littlefuzz, byte(popr.Intn(256)))
+		}
+		// shouldn't panic
+		_ = proto.Unmarshal(littlefuzz, msg)
+	}
+}
+
+func TestIndexQueriesMarshalTo(t *testing.T) {
+	seed := time.Now().UnixNano()
+	popr := rand.New(rand.NewSource(seed))
+	p := NewPopulatedIndexQueries(popr, false)
+	size := p.Size()
+	dAtA := make([]byte, size)
+	for i := range dAtA {
+		dAtA[i] = byte(popr.Intn(256))
+	}
+	_, err := p.MarshalTo(dAtA)
+	if err != nil {
+		t.Fatalf("seed = %d, err = %v", seed, err)
+	}
+	msg := &IndexQueries{}
+	if err := proto.Unmarshal(dAtA, msg); err != nil {
+		t.Fatalf("seed = %d, err = %v", seed, err)
+	}
+	for i := range dAtA {
+		dAtA[i] = byte(popr.Intn(256))
+	}
+	if !p.Equal(msg) {
+		t.Fatalf("seed = %d, %#v !Proto %#v", seed, msg, p)
+	}
+}
+
+func TestIndexQueriesJSON(t *testing.T) {
+	seed := time.Now().UnixNano()
+	popr := rand.New(rand.NewSource(seed))
+	p := NewPopulatedIndexQueries(popr, true)
+	marshaler := jsonpb.Marshaler{}
+	jsondata, err := marshaler.MarshalToString(p)
+	if err != nil {
+		t.Fatalf("seed = %d, err = %v", seed, err)
+	}
+	msg := &IndexQueries{}
+	err = jsonpb.UnmarshalString(jsondata, msg)
+	if err != nil {
+		t.Fatalf("seed = %d, err = %v", seed, err)
+	}
+	if !p.Equal(msg) {
+		t.Fatalf("seed = %d, %#v !Json Equal %#v", seed, msg, p)
+	}
+}
+func TestIndexQueriesProtoText(t *testing.T) {
+	seed := time.Now().UnixNano()
+	popr := rand.New(rand.NewSource(seed))
+	p := NewPopulatedIndexQueries(popr, true)
+	dAtA := proto.MarshalTextString(p)
+	msg := &IndexQueries{}
+	if err := proto.UnmarshalText(dAtA, msg); err != nil {
+		t.Fatalf("seed = %d, err = %v", seed, err)
+	}
+	if !p.Equal(msg) {
+		t.Fatalf("seed = %d, %#v !Proto %#v", seed, msg, p)
+	}
+}
+
+func TestIndexQueriesProtoCompactText(t *testing.T) {
+	seed := time.Now().UnixNano()
+	popr := rand.New(rand.NewSource(seed))
+	p := NewPopulatedIndexQueries(popr, true)
+	dAtA := proto.CompactTextString(p)
+	msg := &IndexQueries{}
+	if err := proto.UnmarshalText(dAtA, msg); err != nil {
+		t.Fatalf("seed = %d, err = %v", seed, err)
+	}
+	if !p.Equal(msg) {
+		t.Fatalf("seed = %d, %#v !Proto %#v", seed, msg, p)
+	}
+}
+
+func TestIndexQueriesSize(t *testing.T) {
+	seed := time.Now().UnixNano()
+	popr := rand.New(rand.NewSource(seed))
+	p := NewPopulatedIndexQueries(popr, true)
+	size2 := proto.Size(p)
+	dAtA, err := proto.Marshal(p)
+	if err != nil {
+		t.Fatalf("seed = %d, err = %v", seed, err)
+	}
+	size := p.Size()
+	if len(dAtA) != size {
+		t.Errorf("seed = %d, size %v != marshalled size %v", seed, size, len(dAtA))
+	}
+	if size2 != size {
+		t.Errorf("seed = %d, size %v != before marshal proto.Size %v", seed, size, size2)
+	}
+	size3 := proto.Size(p)
+	if size3 != size {
+		t.Errorf("seed = %d, size %v != after marshal proto.Size %v", seed, size, size3)
+	}
+}
+
+//These tests are generated by github.com/gogo/protobuf/plugin/testgen