-
Notifications
You must be signed in to change notification settings - Fork 8
/
mcp_client.go
135 lines (115 loc) · 3.32 KB
/
mcp_client.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
/*
* [2013] - [2018] Avi Networks Incorporated
* All Rights Reserved.
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
* http://www.apache.org/licenses/LICENSE-2.0
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package mcp
import (
"context"
"fmt"
"net/url"
"sync"
"github.com/avinetworks/servicemesh/utils"
"google.golang.org/grpc"
mcpapi "istio.io/api/mcp/v1alpha1"
"istio.io/istio/pkg/mcp/configz"
"istio.io/istio/pkg/mcp/monitoring"
"istio.io/istio/pkg/mcp/sink"
)
const (
// DefaultMCPMaxMsgSize is the default maximum message size
DefaultMCPMaxMsgSize = 1024 * 1024 * 4
)
type MCPClient struct {
MCPServerAddrs []string
startFuncs []startFunc
}
func (c *MCPClient) Start(stop <-chan struct{}) error {
// Now start all of the components.
for _, fn := range c.startFuncs {
if err := fn(stop); err != nil {
return err
}
}
return nil
}
func (c *MCPClient) addStartFunc(fn startFunc) {
c.startFuncs = append(c.startFuncs, fn)
}
type startFunc func(stop <-chan struct{}) error
func (c *MCPClient) InitMCPClient() error {
clientNodeID := ""
collections := make([]sink.CollectionOptions, len(IstioConfigTypes))
for i, model := range IstioConfigTypes {
collections[i] = sink.CollectionOptions{
Name: model.Collection,
Incremental: true,
}
}
ctx, cancel := context.WithCancel(context.Background())
var clients []*sink.Client
var conns []*grpc.ClientConn
reporter := monitoring.NewStatsContext("gocontroller/mcp/sink")
for _, addr := range c.MCPServerAddrs {
u, err := url.Parse(addr)
if err != nil {
cancel()
return err
}
utils.AviLog.Info.Println("The MCP server address", u.Host)
securityOption := grpc.WithInsecure()
msgSizeOption := grpc.WithDefaultCallOptions(grpc.MaxCallRecvMsgSize(DefaultMCPMaxMsgSize))
conn, err := grpc.DialContext(ctx, u.Host, securityOption, msgSizeOption)
if err != nil {
fmt.Errorf("Unable to dial MCP Server %q: %v", u.Host, err)
cancel()
return err
}
cl := mcpapi.NewResourceSourceClient(conn)
mcpController := NewController()
sinkOptions := &sink.Options{
CollectionOptions: collections,
Updater: mcpController,
ID: clientNodeID,
Reporter: reporter,
}
mcpClient := sink.NewClient(cl, sinkOptions)
configz.Register(mcpClient)
utils.AviLog.Info.Println("Successfully registered the MCP client")
clients = append(clients, mcpClient)
conns = append(conns, conn)
}
c.addStartFunc(func(stop <-chan struct{}) error {
var wg sync.WaitGroup
for i := range clients {
client := clients[i]
wg.Add(1)
go func() {
client.Run(ctx)
wg.Done()
}()
}
go func() {
<-stop
// Stop the MCP clients and any pending connection.
cancel()
// Close all of the open grpc connections once the mcp
// client(s) have fully stopped.
wg.Wait()
for _, conn := range conns {
_ = conn.Close() // nolint: errcheck
}
reporter.Close()
}()
return nil
})
return nil
}