This repository has been archived by the owner on Jan 26, 2024. It is now read-only.
forked from google/cloudprober
/
server.go
111 lines (98 loc) · 3.26 KB
/
server.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
// Copyright 2018 Google Inc.
//
// 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 server provides a ResourceDiscovery gRPC server implementation. It can
either be used a standalone server, using the binary in the "cmd" subdirectory,
or it can run as a part of the cloudprober binary.
*/
package server
import (
"context"
"fmt"
"github.com/google/cloudprober/logger"
pb "github.com/google/cloudprober/rds/proto"
spb "github.com/google/cloudprober/rds/proto"
"github.com/google/cloudprober/rds/server/gcp"
"github.com/google/cloudprober/rds/server/kubernetes"
configpb "github.com/google/cloudprober/rds/server/proto"
"google.golang.org/grpc"
)
// Server implements a ResourceDiscovery gRPC server.
type Server struct {
providers map[string]Provider
l *logger.Logger
}
// Provider is a resource provider, e.g. GCP provider.
type Provider interface {
ListResources(req *pb.ListResourcesRequest) (*pb.ListResourcesResponse, error)
}
// ListResources implements the ListResources method of the ResourceDiscovery
// service.
func (s *Server) ListResources(ctx context.Context, req *pb.ListResourcesRequest) (*pb.ListResourcesResponse, error) {
p := s.providers[req.GetProvider()]
if p == nil {
return nil, fmt.Errorf("provider %s is not supported", req.GetProvider())
}
return p.ListResources(req)
}
func (s *Server) initProviders(c *configpb.ServerConf) error {
var p Provider
var err error
for _, pc := range c.GetProvider() {
id := pc.GetId()
switch pc.Config.(type) {
case *configpb.Provider_GcpConfig:
if id == "" {
id = gcp.DefaultProviderID
}
s.l.Infof("rds.server: adding GCP provider with id: %s", id)
if p, err = gcp.New(pc.GetGcpConfig(), s.l); err != nil {
return err
}
case *configpb.Provider_KubernetesConfig:
if id == "" {
id = kubernetes.DefaultProviderID
}
s.l.Infof("rds.server: adding Kubernetes provider with id: %s", id)
if p, err = kubernetes.New(pc.GetKubernetesConfig(), s.l); err != nil {
return err
}
}
s.providers[id] = p
}
return nil
}
// New creates a new instance of the ResourceDiscovery Server and attaches it
// to the provided gRPC server.
func New(initCtx context.Context, c *configpb.ServerConf, providers map[string]Provider, l *logger.Logger) (*Server, error) {
srv := &Server{
providers: make(map[string]Provider),
l: l,
}
var err error
if err = srv.initProviders(c); err != nil {
return nil, err
}
// If providers are not nil. This option is mainly for testing.
if providers != nil {
for prefix, p := range providers {
srv.providers[prefix] = p
}
}
return srv, nil
}
// RegisterWithGRPC registers the RDS servers with the given gRPC server.
func (s *Server) RegisterWithGRPC(grpcServer *grpc.Server) {
spb.RegisterResourceDiscoveryServer(grpcServer, s)
}