PIP-1319: Update to the latest etcd client

.gitignore

@@ -4,4 +4,5 @@ __pycache__
 *.pyc
 gubernator.egg-info/
 .DS_Store
-*.iml
+*.iml
+googleapis/

algorithms.go

@@ -17,7 +17,7 @@ limitations under the License.
 package gubernator
 
 import (
-	"github.com/mailgun/holster/v3/clock"
+	"github.com/mailgun/holster/v4/clock"
 )
 
 // Implements token bucket algorithm for rate limiting. https://en.wikipedia.org/wiki/Token_bucket

benchmark_test.go

@@ -20,9 +20,9 @@ import (
 	"context"
 	"testing"
 
-	guber "github.com/mailgun/gubernator"
-	"github.com/mailgun/gubernator/cluster"
-	"github.com/mailgun/holster/v3/syncutil"
+	guber "github.com/mailgun/gubernator/v2"
+	"github.com/mailgun/gubernator/v2/cluster"
+	"github.com/mailgun/holster/v4/syncutil"
 )
 
 func BenchmarkServer_GetPeerRateLimitNoBatching(b *testing.B) {

cache.go

@@ -22,8 +22,8 @@ import (
 	"container/list"
 	"sync"
 
-	"github.com/mailgun/holster/v3/clock"
-	"github.com/mailgun/holster/v3/setter"
+	"github.com/mailgun/holster/v4/clock"
+	"github.com/mailgun/holster/v4/setter"
 	"github.com/prometheus/client_golang/prometheus"
 )
 

client.go

@@ -21,7 +21,7 @@ import (
 	"math/rand"
 	"time"
 
-	"github.com/mailgun/holster/v3/clock"
+	"github.com/mailgun/holster/v4/clock"
 	"github.com/pkg/errors"
 	"google.golang.org/grpc"
 	"google.golang.org/grpc/credentials"

cluster/cluster.go

@@ -21,8 +21,8 @@ import (
 	"fmt"
 	"math/rand"
 
-	"github.com/mailgun/gubernator"
-	"github.com/mailgun/holster/v3/clock"
+	"github.com/mailgun/gubernator/v2"
+	"github.com/mailgun/holster/v4/clock"
 	"github.com/pkg/errors"
 	"github.com/sirupsen/logrus"
 )

cluster/cluster_test.go

@@ -19,8 +19,8 @@ package cluster_test
 import (
 	"testing"
 
-	"github.com/mailgun/gubernator"
-	"github.com/mailgun/gubernator/cluster"
+	"github.com/mailgun/gubernator/v2"
+	"github.com/mailgun/gubernator/v2/cluster"
 	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/require"
 )

cmd/gubernator-cli/main.go

@@ -25,10 +25,10 @@ import (
 	"os"
 
 	"github.com/davecgh/go-spew/spew"
-	guber "github.com/mailgun/gubernator"
-	"github.com/mailgun/holster/v3/clock"
-	"github.com/mailgun/holster/v3/setter"
-	"github.com/mailgun/holster/v3/syncutil"
+	guber "github.com/mailgun/gubernator/v2"
+	"github.com/mailgun/holster/v4/clock"
+	"github.com/mailgun/holster/v4/setter"
+	"github.com/mailgun/holster/v4/syncutil"
 	"github.com/sirupsen/logrus"
 )
 

cmd/gubernator-cluster/main.go

@@ -21,8 +21,8 @@ import (
 	"os"
 	"os/signal"
 
-	"github.com/mailgun/gubernator"
-	"github.com/mailgun/gubernator/cluster"
+	"github.com/mailgun/gubernator/v2"
+	"github.com/mailgun/gubernator/v2/cluster"
 	"github.com/sirupsen/logrus"
 )
 

cmd/gubernator/main.go

@@ -24,8 +24,8 @@ import (
 	"runtime"
 	"syscall"
 
-	"github.com/mailgun/gubernator"
-	"github.com/mailgun/holster/v3/clock"
+	"github.com/mailgun/gubernator/v2"
+	"github.com/mailgun/holster/v4/clock"
 	"github.com/sirupsen/logrus"
 	"k8s.io/klog"
 )

config.go

@@ -27,15 +27,15 @@ import (
 	"strings"
 	"time"
 
-	etcd "github.com/coreos/etcd/clientv3"
 	"github.com/davecgh/go-spew/spew"
-	"github.com/mailgun/holster/v3/clock"
-	"github.com/mailgun/holster/v3/setter"
-	"github.com/mailgun/holster/v3/slice"
+	"github.com/mailgun/holster/v4/clock"
+	"github.com/mailgun/holster/v4/setter"
+	"github.com/mailgun/holster/v4/slice"
 	"github.com/pkg/errors"
 	"github.com/segmentio/fasthash/fnv1"
 	"github.com/segmentio/fasthash/fnv1a"
 	"github.com/sirupsen/logrus"
+	etcd "go.etcd.io/etcd/client/v3"
 	"google.golang.org/grpc"
 )
 
@@ -116,7 +116,7 @@ func (c *Config) SetDefaults() error {
 	setter.SetDefault(&c.Behaviors.MultiRegionBatchLimit, maxBatchSize)
 	setter.SetDefault(&c.Behaviors.MultiRegionSyncWait, time.Second)
 
-	setter.SetDefault(&c.LocalPicker, NewReplicatedConsistentHash(nil, DefaultReplicas))
+	setter.SetDefault(&c.LocalPicker, NewReplicatedConsistentHash(nil, defaultReplicas))
 	setter.SetDefault(&c.RegionPicker, NewRegionPicker(nil))
 	setter.SetDefault(&c.Cache, NewLRUCache(0))
 
@@ -334,27 +334,13 @@ func SetupDaemonConfig(logger *logrus.Logger, configFile string) (DaemonConfig,
 		var hash string
 
 		switch pp {
-		case "consistent-hash":
-			setter.SetDefault(&hash, os.Getenv("GUBER_PEER_PICKER_HASH"), "fnv1a")
-			hashFuncs := map[string]HashFunc{
-				"fnv1a": fnv1a.HashBytes32,
-				"fnv1":  fnv1.HashBytes32,
-				"crc32": nil,
-			}
-			fn, ok := hashFuncs[hash]
-			if !ok {
-				return conf, errors.Errorf("'GUBER_PEER_PICKER_HASH=%s' is invalid; choices are [%s]",
-					hash, validHashKeys(hashFuncs))
-			}
-			conf.Picker = NewConsistentHash(fn)
-
 		case "replicated-hash":
-			setter.SetDefault(&replicas, getEnvInteger(log, "GUBER_REPLICATED_HASH_REPLICAS"), DefaultReplicas)
+			setter.SetDefault(&replicas, getEnvInteger(log, "GUBER_REPLICATED_HASH_REPLICAS"), defaultReplicas)
 			conf.Picker = NewReplicatedConsistentHash(nil, replicas)
 			setter.SetDefault(&hash, os.Getenv("GUBER_PEER_PICKER_HASH"), "fnv1a")
-			hashFuncs := map[string]HashFunc64{
-				"fnv1a": fnv1a.HashBytes64,
-				"fnv1":  fnv1.HashBytes64,
+			hashFuncs := map[string]HashString64{
+				"fnv1a": fnv1a.HashString64,
+				"fnv1":  fnv1.HashString64,
 			}
 			fn, ok := hashFuncs[hash]
 			if !ok {
@@ -542,15 +528,7 @@ func validClientAuthTypes(m map[string]tls.ClientAuthType) string {
 	return strings.Join(rs, ",")
 }
 
-func validHashKeys(m map[string]HashFunc) string {
-	var rs []string
-	for k, _ := range m {
-		rs = append(rs, k)
-	}
-	return strings.Join(rs, ",")
-}
-
-func validHash64Keys(m map[string]HashFunc64) string {
+func validHash64Keys(m map[string]HashString64) string {
 	var rs []string
 	for k, _ := range m {
 		rs = append(rs, k)

daemon.go

@@ -27,9 +27,9 @@ import (
 	"google.golang.org/grpc/keepalive"
 
 	"github.com/grpc-ecosystem/grpc-gateway/runtime"
-	"github.com/mailgun/holster/v3/etcdutil"
-	"github.com/mailgun/holster/v3/setter"
-	"github.com/mailgun/holster/v3/syncutil"
+	"github.com/mailgun/holster/v4/etcdutil"
+	"github.com/mailgun/holster/v4/setter"
+	"github.com/mailgun/holster/v4/syncutil"
 	"github.com/pkg/errors"
 	"github.com/prometheus/client_golang/prometheus"
 	"github.com/prometheus/client_golang/prometheus/promhttp"

etcd.go

@@ -20,12 +20,12 @@ import (
 	"context"
 	"encoding/json"
 
-	etcd "github.com/coreos/etcd/clientv3"
-	"github.com/mailgun/holster/v3/clock"
-	"github.com/mailgun/holster/v3/setter"
-	"github.com/mailgun/holster/v3/syncutil"
+	"github.com/mailgun/holster/v4/clock"
+	"github.com/mailgun/holster/v4/setter"
+	"github.com/mailgun/holster/v4/syncutil"
 	"github.com/pkg/errors"
 	"github.com/sirupsen/logrus"
+	etcd "go.etcd.io/etcd/client/v3"
 )
 
 const (

functional_test.go

@@ -25,10 +25,10 @@ import (
 	"strings"
 	"testing"
 
-	guber "github.com/mailgun/gubernator"
-	"github.com/mailgun/gubernator/cluster"
-	"github.com/mailgun/holster/v3/clock"
-	"github.com/mailgun/holster/v3/testutil"
+	guber "github.com/mailgun/gubernator/v2"
+	"github.com/mailgun/gubernator/v2/cluster"
+	"github.com/mailgun/holster/v4/clock"
+	"github.com/mailgun/holster/v4/testutil"
 	"github.com/prometheus/common/expfmt"
 	"github.com/prometheus/common/model"
 	"github.com/stretchr/testify/assert"

global.go

@@ -20,8 +20,8 @@ import (
 	"context"
 	"time"
 
-	"github.com/mailgun/holster/v3/clock"
-	"github.com/mailgun/holster/v3/syncutil"
+	"github.com/mailgun/holster/v4/clock"
+	"github.com/mailgun/holster/v4/syncutil"
 	"github.com/prometheus/client_golang/prometheus"
 	"github.com/sirupsen/logrus"
 )

go.mod

@@ -1,23 +1,27 @@
-module github.com/mailgun/gubernator
+module github.com/mailgun/gubernator/v2
 
 go 1.14
 
 require (
-	github.com/coreos/etcd v3.3.15+incompatible
 	github.com/davecgh/go-spew v1.1.1
-	github.com/golang/protobuf v1.3.2
-	github.com/grpc-ecosystem/grpc-gateway v1.11.1
-	github.com/hashicorp/memberlist v0.2.0
-	github.com/mailgun/holster/v3 v3.14.0
+	github.com/golang/protobuf v1.5.2
+	github.com/google/go-cmp v0.5.6 // indirect
+	github.com/grpc-ecosystem/grpc-gateway v1.16.0
+	github.com/hashicorp/memberlist v0.2.4
+	github.com/mailgun/holster/v4 v4.0.0
 	github.com/pkg/errors v0.9.1
-	github.com/prometheus/client_golang v1.1.0
-	github.com/prometheus/common v0.6.0
+	github.com/prometheus/client_golang v1.11.0
+	github.com/prometheus/common v0.26.0
 	github.com/segmentio/fasthash v1.0.2
-	github.com/sirupsen/logrus v1.4.2
-	github.com/stretchr/testify v1.4.0
-	golang.org/x/net v0.0.0-20190923162816-aa69164e4478
-	google.golang.org/genproto v0.0.0-20180817151627-c66870c02cf8
-	google.golang.org/grpc v1.23.0
+	github.com/sirupsen/logrus v1.8.1
+	github.com/stretchr/testify v1.7.0
+	go.etcd.io/etcd/client/v3 v3.5.0
+	golang.org/x/net v0.0.0-20210405180319-a5a99cb37ef4
+	golang.org/x/oauth2 v0.0.0-20210615190721-d04028783cf1 // indirect
+	google.golang.org/api v0.30.0
+	google.golang.org/genproto v0.0.0-20210617175327-b9e0b3197ced
+	google.golang.org/grpc v1.38.0
+	google.golang.org/protobuf v1.27.1 // indirect
 	k8s.io/api v0.0.0-20190620084959-7cf5895f2711
 	k8s.io/apimachinery v0.0.0-20190612205821-1799e75a0719
 	k8s.io/client-go v0.0.0-20190620085101-78d2af792bab