rebase: update kubernetes to latest

updating the kubernetes release to the
latest in main go.mod

Signed-off-by: Madhu Rajanna <madhupr007@gmail.com>

vendor/go.etcd.io/etcd/client/v3/client.go

@@ -86,7 +86,7 @@ func New(cfg Config) (*Client, error) {
 // service interface implementations and do not need connection management.
 func NewCtxClient(ctx context.Context, opts ...Option) *Client {
 	cctx, cancel := context.WithCancel(ctx)
-	c := &Client{ctx: cctx, cancel: cancel, lgMu: new(sync.RWMutex)}
+	c := &Client{ctx: cctx, cancel: cancel, lgMu: new(sync.RWMutex), mu: new(sync.RWMutex)}
 	for _, opt := range opts {
 		opt(c)
 	}
@@ -231,15 +231,30 @@ func (c *Client) dialSetupOpts(creds grpccredentials.TransportCredentials, dopts
 		opts = append(opts, grpc.WithInsecure())
 	}
 
+	unaryMaxRetries := defaultUnaryMaxRetries
+	if c.cfg.MaxUnaryRetries > 0 {
+		unaryMaxRetries = c.cfg.MaxUnaryRetries
+	}
+
+	backoffWaitBetween := defaultBackoffWaitBetween
+	if c.cfg.BackoffWaitBetween > 0 {
+		backoffWaitBetween = c.cfg.BackoffWaitBetween
+	}
+
+	backoffJitterFraction := defaultBackoffJitterFraction
+	if c.cfg.BackoffJitterFraction > 0 {
+		backoffJitterFraction = c.cfg.BackoffJitterFraction
+	}
+
 	// Interceptor retry and backoff.
 	// TODO: Replace all of clientv3/retry.go with RetryPolicy:
 	// https://github.com/grpc/grpc-proto/blob/cdd9ed5c3d3f87aef62f373b93361cf7bddc620d/grpc/service_config/service_config.proto#L130
-	rrBackoff := withBackoff(c.roundRobinQuorumBackoff(defaultBackoffWaitBetween, defaultBackoffJitterFraction))
+	rrBackoff := withBackoff(c.roundRobinQuorumBackoff(backoffWaitBetween, backoffJitterFraction))
 	opts = append(opts,
 		// Disable stream retry by default since go-grpc-middleware/retry does not support client streams.
 		// Streams that are safe to retry are enabled individually.
 		grpc.WithStreamInterceptor(c.streamClientInterceptor(withMax(0), rrBackoff)),
-		grpc.WithUnaryInterceptor(c.unaryClientInterceptor(withMax(defaultUnaryMaxRetries), rrBackoff)),
+		grpc.WithUnaryInterceptor(c.unaryClientInterceptor(withMax(unaryMaxRetries), rrBackoff)),
 	)
 
 	return opts, nil

vendor/go.etcd.io/etcd/client/v3/config.go

@@ -88,5 +88,14 @@ type Config struct {
 	// PermitWithoutStream when set will allow client to send keepalive pings to server without any active streams(RPCs).
 	PermitWithoutStream bool `json:"permit-without-stream"`
 
+	// MaxUnaryRetries is the maximum number of retries for unary RPCs.
+	MaxUnaryRetries uint `json:"max-unary-retries"`
+
+	// BackoffWaitBetween is the wait time before retrying an RPC.
+	BackoffWaitBetween time.Duration `json:"backoff-wait-between"`
+
+	// BackoffJitterFraction is the jitter fraction to randomize backoff wait time.
+	BackoffJitterFraction float64 `json:"backoff-jitter-fraction"`
+
 	// TODO: support custom balancer picker
 }

vendor/go.etcd.io/etcd/client/v3/retry_interceptor.go

@@ -19,6 +19,7 @@ package clientv3
 
 import (
 	"context"
+	"errors"
 	"io"
 	"sync"
 	"time"
@@ -85,7 +86,7 @@ func (c *Client) unaryClientInterceptor(optFuncs ...retryOption) grpc.UnaryClien
 				}
 				continue
 			}
-			if !isSafeRetry(c.lg, lastErr, callOpts) {
+			if !isSafeRetry(c, lastErr, callOpts) {
 				return lastErr
 			}
 		}
@@ -279,7 +280,7 @@ func (s *serverStreamingRetryingStream) receiveMsgAndIndicateRetry(m interface{}
 		return true, err
 
 	}
-	return isSafeRetry(s.client.lg, err, s.callOpts), err
+	return isSafeRetry(s.client, err, s.callOpts), err
 }
 
 func (s *serverStreamingRetryingStream) reestablishStreamAndResendBuffer(callCtx context.Context) (grpc.ClientStream, error) {
@@ -319,17 +320,28 @@ func waitRetryBackoff(ctx context.Context, attempt uint, callOpts *options) erro
 }
 
 // isSafeRetry returns "true", if request is safe for retry with the given error.
-func isSafeRetry(lg *zap.Logger, err error, callOpts *options) bool {
+func isSafeRetry(c *Client, err error, callOpts *options) bool {
 	if isContextError(err) {
 		return false
 	}
+
+	// Situation when learner refuses RPC it is supposed to not serve is from the server
+	// perspective not retryable.
+	// But for backward-compatibility reasons we need  to support situation that
+	// customer provides mix of learners (not yet voters) and voters with an
+	// expectation to pick voter in the next attempt.
+	// TODO: Ideally client should be 'aware' which endpoint represents: leader/voter/learner with high probability.
+	if errors.Is(err, rpctypes.ErrGPRCNotSupportedForLearner) && len(c.Endpoints()) > 1 {
+		return true
+	}
+
 	switch callOpts.retryPolicy {
 	case repeatable:
 		return isSafeRetryImmutableRPC(err)
 	case nonRepeatable:
 		return isSafeRetryMutableRPC(err)
 	default:
-		lg.Warn("unrecognized retry policy", zap.String("retryPolicy", callOpts.retryPolicy.String()))
+		c.lg.Warn("unrecognized retry policy", zap.String("retryPolicy", callOpts.retryPolicy.String()))
 		return false
 	}
 }