From 3fb4a7dee7492d673e60905570da6271d45fec29 Mon Sep 17 00:00:00 2001
From: liuxiaolong <736321739@qq.com>
Date: 星期四, 08 八月 2019 17:15:24 +0800
Subject: [PATCH] --
---
agent.go | 179 ++++++++++++++++++++++++++++++++++++++++++++++++-----------
1 files changed, 146 insertions(+), 33 deletions(-)
diff --git a/agent.go b/agent.go
index 2fb96b1..70ab249 100644
--- a/agent.go
+++ b/agent.go
@@ -23,6 +23,7 @@
"fmt"
"github.com/hashicorp/memberlist"
"io/ioutil"
+ "net"
"os"
//"os"
@@ -36,15 +37,23 @@
)
const (
- QueryEventGetDB = "GetDatabase"
+ QueryEventGetDB = "GetDatabase"
QueryEventUpdateDBData = "UpdateDBData"
)
+
// Agent warps the serf agent
type Agent struct {
*agent.Agent
conf *Config
readyCh chan struct{}
errorCh chan error
+}
+
+type NodeInfo struct {
+ ClusterID string `json:"clusterID"`
+ NodeID string `json:"nodeID"`
+ NodeAddress string `json:"nodeAddress"`
+ IsAlive int `json:"isAlive"`
}
// Create create serf agent with config
@@ -56,7 +65,7 @@
}
// create serf agent with serf config
- fmt.Println("conf.Config.EncryptKey:",conf.EncryptKey)
+ fmt.Println("conf.Config.EncryptKey:", conf.EncryptKey)
serfAgent, err := agent.Create(conf.Config, serfConf, nil)
if err != nil {
return nil, err
@@ -96,6 +105,8 @@
a.errorCh <- err
}
}
+
+ go a.BroadcastMemberlist(BroadcastInterval * time.Second)
}
// HandleEvent Handles serf.EventMemberJoin events,
@@ -118,7 +129,7 @@
case *serf.Query:
- if ev.Name == QueryEventGetDB{
+ if ev.Name == QueryEventGetDB {
//bak file and send resp
filename, err := BakDbFile()
if err != nil {
@@ -148,21 +159,31 @@
}
}
} else if ev.Name == QueryEventUpdateDBData {
- fmt.Println(string(ev.Payload))
- var tmpstringslice []string
- tmpstringslice = append(tmpstringslice, string(ev.Payload))
- fmt.Println(tmpstringslice)
- rows, err := ExecuteQuerySql(tmpstringslice)
- if err != nil {
- fmt.Println("err: ", err)
+ //fmt.Println(string(ev.Payload))
+ //var tmpstringslice []string
+ //tmpstringslice = append(tmpstringslice, string(ev.Payload))
+ //fmt.Println(tmpstringslice)
+ //rows, err := ExecuteQuerySql(tmpstringslice)
+ //if err != nil {
+ // fmt.Println("err: ", err)
+ // return
+ //}
+ //var rowsReturn []Rows
+ //for _, r := range rows {
+ // rowsReturn = append(rowsReturn, *r)
+ //}
+ var tableNames []string
+ err := json.Unmarshal(ev.Payload, &tableNames)
+ if err !=nil {
+ fmt.Println("Query tableNames unmarshal err")
return
}
- var rowsReturn []Rows
- for _,r := range rows {
- rowsReturn = append(rowsReturn, *r)
+ datas, err := ExecuteQueryByGorm(tableNames)
+ if err !=nil {
+ fmt.Println("queryByGorm err")
+ return
}
-
- bytesReturn, err := json.Marshal(rowsReturn)
+ bytesReturn, err := json.Marshal(datas)
fmt.Println("results: ", bytesReturn)
if query, ok := event.(*serf.Query); ok {
if err := query.Respond(bytesReturn); err != nil {
@@ -174,7 +195,6 @@
//var res []*Rows
//json.Unmarshal(bytesReturn, &res)
}
-
default:
fmt.Printf("Unknown event type: %s\n", ev.EventType().String())
@@ -193,6 +213,38 @@
//}
//a.DeregisterEventHandler(a)
//close(a.readyCh)
+}
+
+func (a *Agent) BroadcastMemberlist(delay time.Duration) {
+ //serf := a.serf
+ serf := a.Agent.Serf()
+ mb := serf.LocalMember()
+ mblist := serf.Memberlist()
+ fmt.Println("mb:", mb)
+
+ // copy local node
+ localNode := *mblist.LocalNode()
+ nodeID := a.conf.NodeName
+ nodeAddress := localNode.Address()
+ clusterID := mb.Tags[tagKeyClusterID]
+ isAlive := int(mb.Status)
+
+ message, _ := json.Marshal(NodeInfo{
+ clusterID,
+ nodeID,
+ nodeAddress,
+ isAlive,
+ })
+
+ // replace node address
+ localNode.Addr = net.ParseIP(BroadcastIP)
+ //localNode.Addr = net.IPv4(255,255,255,255)
+ localNode.Port = BroadcastPort
+ for {
+ // fmt.Printf("localNode: %v %v\n", nodeName, nodeAddress)
+ mblist.SendBestEffort(&localNode, []byte(message))
+ time.Sleep(delay)
+ }
}
// Ready Returns a channel that will be closed when serf is ready
@@ -317,7 +369,7 @@
//GetDbFromCluster get the newest database after join cluster
//dbPathWrite the path where to write after got a database,
-func (a *Agent)GetDbFromCluster(dbPathWrite string) {
+func (a *Agent) GetDbFromCluster(dbPathWrite string) {
//members: get name of first member
mbs := a.GroupMembers(a.conf.ClusterID)
var specmembername string
@@ -363,8 +415,69 @@
}()
}
+//GetDbFromCluster get the newest database after join cluster
+//dbPathWrite the path where to write after got a database,
+func (a *Agent) GetTableDataFromCluster(tableNames []string) error {
+ //members: get name of first member
+ mbs := a.GroupMembers(a.conf.ClusterID)
+ var specmembername string
+ for _, m := range mbs {
+ if m.Addr.String() != a.conf.BindAddr {
+ specmembername = m.Name
+ break
+ }
+ }
+ fmt.Println(specmembername)
+
+ //query: get db file.
+ params := serf.QueryParam{
+ FilterNodes: strings.Fields(specmembername),
+ }
+
+ //SQL
+ tBytes, _ := json.Marshal(tableNames)
+
+ resp, err := a.Query(QueryEventUpdateDBData, tBytes, ¶ms)
+ if err == nil || !strings.Contains(err.Error(), "cannot contain") {
+ fmt.Println("err: ", err)
+ }
+
+
+ go func() {
+ respCh := resp.ResponseCh()
+ for {
+ select {
+ case r := <-respCh:
+ fmt.Println("x length is: ", len(r.Payload))
+ // // byte to file.
+ var dumpSqls []string
+ err := json.Unmarshal(r.Payload, &dumpSqls)
+ if err ==nil {
+ if flag,_ := ExecuteSqlByGorm(dumpSqls);flag{
+ fmt.Println("data dump success")
+ }
+ }
+ return
+ }
+ }
+ }()
+ return nil
+
+ //r, err = c.Query([]string{query}, false, false)
+ //if err != nil {
+ // return err
+ //}
+ //for _, x := range r[0].Values {
+ // y := fmt.Sprintf("%s;\n", x[0].(string))
+ // if _, err := w.Write([]byte(y)); err != nil {
+ // return err
+ // }
+ //}
+
+}
+
//SyncSql boardcast sql to cluster
-func (a *Agent)SyncSql(sqlOp string) {
+func (a *Agent) SyncSql(sqlOp string) {
// event : use to send command to operate db.
err := a.UserEvent("SyncSql", []byte(sqlOp), false)
if err == nil || !strings.Contains(err.Error(), "cannot contain") {
@@ -393,14 +506,14 @@
func InitNode(clusterID string, password string, nodeID string) (*Agent, error) {
conf := DefaultConfig()
fmt.Println("clusterID:", clusterID, "password:", password, "nodeID:", nodeID)
- //conf.ClusterID = clusterID
+ conf.ClusterID = clusterID
conf.NodeName = nodeID
if password == "" {
conf.EncryptKey = DefaultEncryptKey
- }else{
+ } else {
if len(password) >= 16 {
password = password[:16]
- }else{
+ } else {
password = fmt.Sprintf("%016s", password)[:16]
//return nil, fmt.Errorf("error password")
}
@@ -418,22 +531,26 @@
agent.ShutdownCh()
}()
time.Sleep(time.Second)
- fmt.Println("Stats:",agent.Agent.Serf().Stats())
- fmt.Println("EncryptionEnabled:",agent.Agent.Serf().EncryptionEnabled())
- fmt.Printf("create agent sucess!!")
+ fmt.Println("Stats:", agent.Agent.Serf().Stats())
+ fmt.Println("EncryptionEnabled:", agent.Agent.Serf().EncryptionEnabled())
+ fmt.Println("create agent sucess!!")
return agent, nil
}
func (a *Agent) JoinByNodeIP(ips []string) error {
var nodes []string
+
+ if len(ips) == 0 {
+ return fmt.Errorf("No Nodes To Join!")
+ }
for _, ip := range ips {
node := fmt.Sprintf("%s:%d", ip, DefaultBindPort)
nodes = append(nodes, node)
}
n, err := a.Agent.Join(nodes, true)
- if err != nil || n == 0{
+ if err != nil || n == 0 {
a.Stop()
fmt.Println("Stop node")
return fmt.Errorf("Error Encrypt Key!")
@@ -444,14 +561,14 @@
type Node struct {
clusterID string
- NodeID string
- IP string
- isAlive int //StatusNone:0, StatusAlive:1, StatusLeaving:2, StatusLeft:3, StatusFailed:4
+ NodeID string
+ IP string
+ isAlive int //StatusNone:0, StatusAlive:1, StatusLeaving:2, StatusLeft:3, StatusFailed:4
}
func (a *Agent) GetNodes() (nodes []Node) {
var node Node
- fmt.Println("a.conf.ClusterID:",a.conf.ClusterID)
+ fmt.Println("a.conf.ClusterID:", a.conf.ClusterID)
mbs := a.GroupMembers(a.conf.ClusterID)
for _, mb := range mbs {
node.NodeID = mb.Name
@@ -464,7 +581,3 @@
return nodes
}
-
-
-
-
--
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