/
http.go
113 lines (98 loc) · 3.09 KB
/
http.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
/*
* Copyright 2020 The Multicluster-Scheduler Authors.
*
* 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 http
import (
"context"
"crypto/tls"
"io"
"net"
"net/http"
"github.com/pkg/errors"
"github.com/virtual-kubelet/virtual-kubelet/log"
"github.com/virtual-kubelet/virtual-kubelet/node/api"
)
// AcceptedCiphers is the list of accepted TLS ciphers, with known weak ciphers elided
// Note this list should be a moving target.
var AcceptedCiphers = []uint16{
tls.TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA,
tls.TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA,
tls.TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA,
tls.TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA,
tls.TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,
tls.TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,
tls.TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,
tls.TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,
}
func loadTLSConfig(certPEMBlock, keyPEMBlock []byte) (*tls.Config, error) {
cert, err := tls.X509KeyPair(certPEMBlock, keyPEMBlock)
if err != nil {
return nil, errors.Wrap(err, "error loading tls certs")
}
return &tls.Config{
Certificates: []tls.Certificate{cert},
MinVersion: tls.VersionTLS12,
PreferServerCipherSuites: true,
CipherSuites: AcceptedCiphers,
}, nil
}
type Provider interface {
RunInContainer(ctx context.Context, namespace, podName, containerName string, cmd []string, attach api.AttachIO) error
GetContainerLogs(ctx context.Context, namespace, podName, containerName string, opts api.ContainerLogOpts) (io.ReadCloser, error)
}
func SetupHTTPServer(ctx context.Context, p Provider, certPEMBlock, keyPEMBlock []byte) (_ func(), retErr error) {
var closers []io.Closer
cancel := func() {
for _, c := range closers {
c.Close()
}
}
defer func() {
if retErr != nil {
cancel()
}
}()
tlsCfg, err := loadTLSConfig(certPEMBlock, keyPEMBlock)
if err != nil {
return nil, err
}
l, err := tls.Listen("tcp", DefaultKubeletAddr, tlsCfg)
if err != nil {
return nil, errors.Wrap(err, "error setting up listener for pod http server")
}
mux := http.NewServeMux()
podRoutes := api.PodHandlerConfig{
RunInContainer: p.RunInContainer,
GetContainerLogs: p.GetContainerLogs,
}
api.AttachPodRoutes(podRoutes, mux, true)
s := &http.Server{
Handler: mux,
TLSConfig: tlsCfg,
}
go serveHTTP(ctx, s, l, "pods")
closers = append(closers, s)
return cancel, nil
}
func serveHTTP(ctx context.Context, s *http.Server, l net.Listener, name string) {
if err := s.Serve(l); err != nil {
select {
case <-ctx.Done():
default:
log.G(ctx).WithError(err).Errorf("Error setting up %s http server", name)
}
}
l.Close()
}