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Copy pathnodes.go
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Copy pathnodes.go
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176 lines (157 loc) · 3.81 KB
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package etcd
import (
"bytes"
"context"
"encoding/json"
"sync"
"github.com/google/uuid"
"github.com/eolinker/eosc/env"
"github.com/eolinker/eosc/log"
"go.etcd.io/etcd/api/v3/mvccpb"
"go.etcd.io/etcd/client/pkg/v3/types"
clientv3 "go.etcd.io/etcd/client/v3"
)
var (
_clusterId = []byte("~/cluster")
_nodePre = []byte("~/nodes/")
)
type NodeGatewayConfig struct {
Urls []string `json:"urls"`
}
type Clusters struct {
data map[string]*NodeGatewayConfig
cluster string
mu sync.RWMutex
}
type EventType = mvccpb.Event_EventType
func getClusterId() string {
clusterId, has := env.GetEnv("CLUSTER_ID")
if !has || clusterId == "" {
return uuid.NewString()
}
return clusterId
}
func NewClusters(ctx context.Context, client *clientv3.Client, s *_Server) *Clusters {
c := &Clusters{
cluster: "",
data: map[string]*NodeGatewayConfig{},
}
response, err := client.Get(ctx, "~/", clientv3.WithPrefix())
if err != nil {
log.Warn("get init cluster:", err)
return c
}
watch := client.Watch(ctx, "~/", clientv3.WithPrefix())
for _, kv := range response.Kvs {
if bytes.Equal(kv.Key, _clusterId) {
c.cluster = string(kv.Value)
continue
}
nodeId := string(bytes.TrimPrefix(kv.Key, _nodePre))
cfg := new(NodeGatewayConfig)
_ = json.Unmarshal(kv.Value, cfg)
c.data[nodeId] = cfg
}
if c.cluster == "" {
c.cluster = getClusterId()
_, _ = client.Put(ctx, string(_clusterId), c.cluster)
}
go func() {
for watcher := range watch {
c.mu.Lock()
for _, event := range watcher.Events {
//if event.Type == mvccpb.DELETE {
// log.DebugF("node event: %s, %s, %s", event.Type, string(event.Kv.Key), s.server.ID().String())
// nodeId := string(bytes.TrimPrefix(event.Kv.Key, _nodePre))
// if nodeId == s.server.ID().String() {
// // while remove self
// allData, _ := s.getAllData()
// s.clearCluster()
// err = s.restart("")
// if err != nil {
// log.Errorf("restart error: %s", err.Error())
// return
// }
//
// s.resetAllData(allData)
// return
// }
//}
c.nodeEventDoer(event.Type, event.Kv.Key, event.Kv.Value)
}
memberInitUrls := make(map[string][]string)
for _, m := range s.server.Cluster().Members() {
id := m.Name
if _, has := c.data[id]; has {
memberInitUrls[id] = m.PeerURLs
}
}
clusterString := initialClusterString(memberInitUrls)
s.resetCluster(clusterString)
c.mu.Unlock()
}
}()
//go func() {
// ticket := time.NewTicker(5 * time.Second)
// defer ticket.Stop()
// var allData map[string][]byte
// var err error
// for {
// select {
// case <-ctx.Done():
// return
// case <-s.server.StopNotify():
// s.clearCluster()
//
// err = s.restart("")
// if err != nil {
// log.Errorf("restart error: %s", err.Error())
// return
// }
// if allData != nil {
// s.resetAllData(allData)
// }
// return
// case <-ticket.C:
// allData, err = s.getAllData()
// if err != nil {
// log.Errorf("get all data error: %s", err.Error())
// }
// }
// }
//}()
return c
}
func (cs *Clusters) nodeEventDoer(t EventType, key, v []byte) {
if bytes.Equal(key, _clusterId) {
cs.cluster = string(v)
return
}
nodeId := string(bytes.TrimPrefix(key, _nodePre))
switch t {
case mvccpb.PUT:
config := new(NodeGatewayConfig)
_ = json.Unmarshal(v, config)
cs.data[nodeId] = config
case mvccpb.DELETE:
delete(cs.data, nodeId)
}
}
func (cs *Clusters) parse(leader types.ID, members ...Info) []*Node {
nodes := make([]*Node, 0, len(members))
for _, m := range members {
n := &Node{
Id: m.ID,
ID: m.ID.String(),
Name: m.Name,
Peer: m.PeerURLs,
Admin: m.ClientURLs,
IsLeader: leader == m.ID,
}
if g, has := cs.data[n.ID]; has {
n.Server = g.Urls
}
nodes = append(nodes, n)
}
return nodes
}