chore: Improve logging of jumphash server selector

pkg/bloomgateway/client_pool.go

@@ -47,7 +47,7 @@ type AddressProvider interface {
 }
 
 func NewJumpHashClientPool(pool *client.Pool, dnsProvider AddressProvider, updateInterval time.Duration, logger log.Logger) *JumpHashClientPool {
-	selector := jumphash.DefaultSelector()
+	selector := jumphash.DefaultSelector("bloomgateway")
 	err := selector.SetServers(dnsProvider.Addresses()...)
 	if err != nil {
 		level.Warn(logger).Log("msg", "error updating servers", "err", err)

pkg/storage/chunk/cache/memcached_client.go

@@ -114,7 +114,7 @@ func (cfg *MemcachedClientConfig) RegisterFlagsWithPrefix(prefix, description st
 func NewMemcachedClient(cfg MemcachedClientConfig, name string, r prometheus.Registerer, logger log.Logger, metricsNamespace string) MemcachedClient {
 	var selector serverSelector
 	if cfg.ConsistentHash {
-		selector = jumphash.DefaultSelector()
+		selector = jumphash.DefaultSelector("memcached")
 	} else {
 		selector = &memcache.ServerList{}
 	}

pkg/util/jumphash/memcached_client_selector.go

@@ -7,6 +7,7 @@ import (
 
 	"github.com/cespare/xxhash"
 	"github.com/facette/natsort"
+	"github.com/go-kit/log"
 	"github.com/go-kit/log/level"
 	"github.com/grafana/gomemcache/memcache"
 
@@ -23,6 +24,7 @@ import (
 // with consistent DNS names where the naturally sorted order
 // is predictable.
 type Selector struct {
+	logger          log.Logger
 	mu              sync.RWMutex
 	addrs           []net.Addr
 	resolveUnixAddr UnixResolver
@@ -33,15 +35,17 @@ type UnixResolver func(network, address string) (*net.UnixAddr, error)
 
 type TCPResolver func(network, address string) (*net.TCPAddr, error)
 
-func NewSelector(resolveUnixAddr UnixResolver, resolveTCPAddr TCPResolver) *Selector {
+func NewSelector(name string, resolveUnixAddr UnixResolver, resolveTCPAddr TCPResolver) *Selector {
 	return &Selector{
+		logger:          log.With(util_log.Logger, "name", name),
 		resolveUnixAddr: resolveUnixAddr,
 		resolveTCPAddr:  resolveTCPAddr,
 	}
 }
 
-func DefaultSelector() *Selector {
+func DefaultSelector(name string) *Selector {
 	return &Selector{
+		logger:          log.With(util_log.Logger, "name", name),
 		resolveUnixAddr: net.ResolveUnixAddr,
 		resolveTCPAddr:  net.ResolveTCPAddr,
 	}
@@ -102,7 +106,7 @@ func (s *Selector) SetServers(servers ...string) error {
 		}
 	}
 
-	level.Debug(util_log.Logger).Log("msg", "updating memcached servers", "servers", strings.Join(addresses(naddrs), ","), "count", len(naddrs))
+	level.Debug(util_log.Logger).Log("msg", "updating servers", "servers", strings.Join(addresses(naddrs), ","), "count", len(naddrs))
 
 	s.mu.Lock()
 	defer s.mu.Unlock()

pkg/util/jumphash/memcached_client_selector_test.go

@@ -57,6 +57,7 @@ var mockTCPResolver = func(_, address string) (*net.TCPAddr, error) {
 
 func TestMemcachedJumpHashSelector_PickSever(t *testing.T) {
 	s := NewSelector(
+		"test",
 		mockUnixResolver,
 		mockTCPResolver,
 	)
@@ -84,6 +85,7 @@ func TestMemcachedJumpHashSelector_PickSever(t *testing.T) {
 
 func TestMemcachedJumpHashSelector_PickSever_ErrNoServers(t *testing.T) {
 	s := NewSelector(
+		"test",
 		mockUnixResolver,
 		mockTCPResolver,
 	)