fixed kv errors

pkg/raft/kv.go

@@ -1,20 +1,14 @@
 package raft
 
 import (
-	"errors"
 	"strings"
 	"sync"
 
+	"git.giftfish.de/ston1th/haproxy-lb/pkg/cluster"
 	"git.giftfish.de/ston1th/raftbbolt/msgpack"
 	"github.com/hashicorp/raft"
 )
 
-var (
-	ErrNotLeader      = errors.New("raft: not leader")
-	ErrKeyNotFound    = errors.New("raft: key not found")
-	ErrPrefixNotFound = errors.New("raft: prefix not found")
-)
-
 type kvm map[string][]byte
 
 type kv struct {
@@ -28,7 +22,7 @@ func (kv *kv) Get(k string) ([]byte, error) {
 	defer kv.mu.Unlock()
 	v, ok := kv.m[k]
 	if !ok {
-		return nil, ErrKeyNotFound
+		return nil, cluster.ErrKeyNotFound
 	}
 	return v, nil
 }
@@ -43,14 +37,14 @@ func (kv *kv) GetPrefix(pk string) (m map[string][]byte, err error) {
 		}
 	}
 	if len(m) == 0 {
-		err = ErrPrefixNotFound
+		err = cluster.ErrPrefixNotFound
 	}
 	return
 }
 
 func (kv *kv) Set(k string, v []byte) error {
 	if kv.r.State() != raft.Leader {
-		return ErrNotLeader
+		return cluster.ErrNotLeader
 	}
 
 	c := &raftCmd{SET, k, v}
@@ -66,7 +60,7 @@ func (kv *kv) Set(k string, v []byte) error {
 // Delete deletes the given key.
 func (kv *kv) Delete(k string) error {
 	if kv.r.State() != raft.Leader {
-		return ErrNotLeader
+		return cluster.ErrNotLeader
 	}
 
 	c := &raftCmd{Op: DELETE, K: k}