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
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
|
/*
Copyright 2020 Intel Corporation.
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 rpc
import (
"context"
"strconv"
"strings"
"sync"
"time"
"github.com/onap/multicloud-k8s/src/orchestrator/pkg/infra/config"
log "github.com/onap/multicloud-k8s/src/orchestrator/pkg/infra/logutils"
pkgerrors "github.com/pkg/errors"
"google.golang.org/grpc"
"google.golang.org/grpc/connectivity"
"google.golang.org/grpc/credentials"
"google.golang.org/grpc/testdata"
)
type ContextUpdateRequest interface {
}
type ContextUpdateResponse interface {
}
type InstallAppRequest interface {
}
type InstallAppResponse interface {
}
type rpcInfo struct {
conn *grpc.ClientConn
host string
port int
}
var mutex = &sync.Mutex{}
var rpcConnections = make(map[string]rpcInfo)
// GetRpcConn is used by RPC client code which needs the connection for a
// given controller for doing RPC calls with that controller.
func GetRpcConn(name string) *grpc.ClientConn {
mutex.Lock()
defer mutex.Unlock()
if val, ok := rpcConnections[name]; ok {
if val.conn.GetState() == connectivity.TransientFailure {
val.conn.ResetConnectBackoff()
ctx, cancel := context.WithTimeout(context.Background(), 10*time.Millisecond)
if !val.conn.WaitForStateChange(ctx, connectivity.TransientFailure) {
log.Warn("Error re-establishing RPC connection", log.Fields{
"Server": name,
"Host": val.host,
"Port": val.port,
})
}
cancel()
}
return val.conn
}
return nil
}
func UpdateRpcConn(name, host string, port int) {
mutex.Lock()
defer mutex.Unlock()
if val, ok := rpcConnections[name]; ok {
// close connection if mismatch in update vs cached connect info
if val.host != host || val.port != port {
log.Info("Closing RPC connection due to mismatch", log.Fields{
"Server": name,
"Old Host": val.host,
"Old Port": val.port,
"New Host": host,
"New Port": port,
})
err := val.conn.Close()
if err != nil {
log.Warn("Error closing RPC connection", log.Fields{
"Server": name,
"Host": val.host,
"Port": val.port,
"Error": err,
})
}
} else {
if val.conn.GetState() == connectivity.TransientFailure {
val.conn.ResetConnectBackoff()
}
return
}
}
// connect and update rpcConnection list - for new or modified connection
conn, err := createClientConn(host, port)
if err != nil {
log.Warn("Failed to create RPC Client connection", log.Fields{
"Error": err,
})
delete(rpcConnections, name)
} else {
log.Info("Added RPC Client connection", log.Fields{
"Controller": name,
})
rpcConnections[name] = rpcInfo{
conn: conn,
host: host,
port: port,
}
}
}
// CloseAllRpcConn closes all connections
func CloseAllRpcConn() {
mutex.Lock()
for k, v := range rpcConnections {
err := v.conn.Close()
if err != nil {
log.Warn("Error closing RPC connection", log.Fields{
"Server": k,
"Host": v.host,
"Port": v.port,
"Error": err,
})
}
}
mutex.Unlock()
}
// RemoveRpcConn closes the connection and removes from map
func RemoveRpcConn(name string) {
mutex.Lock()
if val, ok := rpcConnections[name]; ok {
err := val.conn.Close()
if err != nil {
log.Warn("Error closing RPC connection", log.Fields{
"Server": name,
"Host": val.host,
"Port": val.port,
"Error": err,
})
}
delete(rpcConnections, name)
}
mutex.Unlock()
}
// createConn creates the Rpc Client Connection
func createClientConn(Host string, Port int) (*grpc.ClientConn, error) {
var err error
var tls bool
var opts []grpc.DialOption
serverAddr := Host + ":" + strconv.Itoa(Port)
serverNameOverride := config.GetConfiguration().GrpcServerNameOverride
if strings.Contains(config.GetConfiguration().GrpcEnableTLS, "enable") {
tls = true
} else {
tls = false
}
caFile := config.GetConfiguration().GrpcCAFile
if tls {
if caFile == "" {
caFile = testdata.Path("ca.pem")
}
creds, err := credentials.NewClientTLSFromFile(caFile, serverNameOverride)
if err != nil {
log.Error("Failed to create TLS credentials", log.Fields{
"Error": err,
"Host": Host,
"Port": Port,
})
}
opts = append(opts, grpc.WithTransportCredentials(creds))
} else {
opts = append(opts, grpc.WithInsecure())
}
conn, err := grpc.Dial(serverAddr, opts...)
if err != nil {
pkgerrors.Wrap(err, "Grpc Client Initialization failed with error")
}
return conn, err
}
|
