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volume servers always connect to the master leader

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This commit is contained in:
Chris Lu
2017-01-13 10:20:40 -08:00
parent d953ed442c
commit 3065506b38
4 changed files with 25 additions and 38 deletions
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37
weed/storage/store.go
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@@ -3,7 +3,6 @@ package storage
import (
"errors"
"fmt"
"math/rand"
"strconv"
"strings"
@@ -17,49 +16,47 @@ const (
)
type MasterNodes struct {
nodes []string
lastNode int
nodes []string
leader string
}
func (mn *MasterNodes) String() string {
return fmt.Sprintf("nodes:%v, lastNode:%d", mn.nodes, mn.lastNode)
return fmt.Sprintf("nodes:%v, leader:%s", mn.nodes, mn.leader)
}
func NewMasterNodes(bootstrapNode string) (mn *MasterNodes) {
mn = &MasterNodes{nodes: []string{bootstrapNode}, lastNode: -1}
mn = &MasterNodes{nodes: []string{bootstrapNode}, leader: ""}
return
}
func (mn *MasterNodes) Reset() {
glog.V(4).Infof("Resetting master nodes: %v", mn)
if len(mn.nodes) > 1 && mn.lastNode >= 0 {
glog.V(0).Infof("Reset master %s from: %v", mn.nodes[mn.lastNode], mn.nodes)
mn.lastNode = -mn.lastNode - 1
if mn.leader != "" {
mn.leader = ""
glog.V(0).Infof("Resetting master nodes: %v", mn)
}
}
func (mn *MasterNodes) FindMaster() (string, error) {
func (mn *MasterNodes) FindMaster() (leader string, err error) {
if len(mn.nodes) == 0 {
return "", errors.New("No master node found!")
}
if mn.lastNode < 0 {
if mn.leader == "" {
for _, m := range mn.nodes {
glog.V(4).Infof("Listing masters on %s", m)
if masters, e := operation.ListMasters(m); e == nil {
if len(masters) == 0 {
continue
if leader, masters, e := operation.ListMasters(m); e == nil {
if leader != "" {
mn.nodes = append(masters, m)
mn.leader = leader
glog.V(2).Infof("current master nodes is %v", mn)
break
}
mn.nodes = append(masters, m)
mn.lastNode = rand.Intn(len(mn.nodes))
glog.V(2).Infof("current master nodes is %v", mn)
break
} else {
glog.V(4).Infof("Failed listing masters on %s: %v", m, e)
}
}
}
if mn.lastNode < 0 {
if mn.leader == "" {
return "", errors.New("No master node available!")
}
return mn.nodes[mn.lastNode], nil
return mn.leader, nil
}
/*