/
conn_k8s.go
192 lines (168 loc) · 4.41 KB
/
conn_k8s.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
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
package srvconn
import (
"context"
"errors"
"fmt"
"os"
"path/filepath"
"strconv"
"strings"
authorizationv1 "k8s.io/api/authorization/v1"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/client-go/kubernetes"
"k8s.io/client-go/rest"
"github.com/jumpserver/koko/pkg/config"
"github.com/jumpserver/koko/pkg/localcommand"
"github.com/jumpserver/koko/pkg/logger"
"github.com/jumpserver/koko/pkg/utils"
)
var (
InValidToken = errors.New("invalid token")
_ ServerConnection = (*K8sCon)(nil)
)
const (
k8sInitFilename = "init-kubectl.sh"
)
// 类似于 `kubectl --insecure-skip-tls-verify=%s --token=%s --server=%s auth can-i get pods`
func IsValidK8sUserToken(o *k8sOptions) bool {
k8sCfg := o.K8sCfg()
client, err := kubernetes.NewForConfig(k8sCfg)
if err != nil {
logger.Errorf("K8sCon new config err: %s", err)
return false
}
sar := &authorizationv1.SelfSubjectAccessReview{
Spec: authorizationv1.SelfSubjectAccessReviewSpec{
ResourceAttributes: &authorizationv1.ResourceAttributes{
Verb: "get",
Resource: "pods",
},
},
}
authClient := client.AuthorizationV1()
resp, err2 := authClient.SelfSubjectAccessReviews().Create(context.TODO(), sar, metav1.CreateOptions{})
if err2 != nil {
logger.Errorf("K8sCon check token pods auth err: %s", err2)
return false
}
logger.Debugf("K8sCon check token pods auth resp: %+v", resp)
return true
}
func NewK8sConnection(ops ...K8sOption) (*K8sCon, error) {
args := &k8sOptions{
Username: os.Getenv("USER"),
ClusterServer: "https://127.0.0.1:8443",
Token: "",
IsSkipTls: true,
ExtraEnv: map[string]string{},
}
for _, setter := range ops {
setter(args)
}
if !IsValidK8sUserToken(args) {
return nil, InValidToken
}
_, err := utils.Encrypt(args.Token, config.CipherKey)
if err != nil {
return nil, fmt.Errorf("%w: encrypt k8s token failed %s", InValidToken, err)
}
lcmd, err := startK8SLocalCommand(args)
if err != nil {
logger.Errorf("K8sCon start local pty err: %s", err)
return nil, fmt.Errorf("K8sCon start local pty err: %w", err)
}
err = lcmd.SetWinSize(args.win.Width, args.win.Height)
if err != nil {
_ = lcmd.Close()
return nil, err
}
return &K8sCon{options: args, LocalCommand: lcmd}, nil
}
type K8sCon struct {
options *k8sOptions
*localcommand.LocalCommand
}
func (k *K8sCon) KeepAlive() error {
return nil
}
type k8sOptions struct {
ClusterServer string // https://172.16.10.51:8443
Username string // user 系统用户名
Token string // 授权token
IsSkipTls bool
ExtraEnv map[string]string
win Windows
}
func (o *k8sOptions) K8sCfg() *rest.Config {
kubeConf := &rest.Config{
Host: o.ClusterServer,
BearerToken: o.Token,
}
if o.IsSkipTls {
kubeConf.Insecure = true
}
return kubeConf
}
func (o *k8sOptions) Env() []string {
token, err := utils.Encrypt(o.Token, config.CipherKey)
if err != nil {
logger.Errorf("Encrypt k8s token err: %s", err)
token = o.Token
}
skipTls := "true"
if !o.IsSkipTls {
skipTls = "false"
}
k8sName := strings.Trim(strconv.Quote(o.ExtraEnv["K8sName"]), "\"")
k8sName = strings.ReplaceAll(k8sName, "`", "\\`")
return []string{
fmt.Sprintf("KUBECTL_USER=%s", o.Username),
fmt.Sprintf("KUBECTL_CLUSTER=%s", o.ClusterServer),
fmt.Sprintf("KUBECTL_INSECURE_SKIP_TLS_VERIFY=%s", skipTls),
fmt.Sprintf("K8S_ENCRYPTED_TOKEN=%s", token),
fmt.Sprintf("WELCOME_BANNER=%s", config.KubectlBanner),
fmt.Sprintf("K8S_NAME=%s", k8sName),
}
}
func startK8SLocalCommand(args *k8sOptions) (*localcommand.LocalCommand, error) {
pwd, _ := os.Getwd()
shPath := filepath.Join(pwd, k8sInitFilename)
argv := []string{
"--fork",
"--pid",
"--mount-proc",
shPath,
}
return localcommand.New("unshare", argv, localcommand.WithEnv(args.Env()))
}
type K8sOption func(*k8sOptions)
func K8sUsername(username string) K8sOption {
return func(args *k8sOptions) {
args.Username = username
}
}
func K8sToken(token string) K8sOption {
return func(args *k8sOptions) {
args.Token = token
}
}
func K8sClusterServer(clusterServer string) K8sOption {
return func(args *k8sOptions) {
args.ClusterServer = clusterServer
}
}
func K8sExtraEnvs(envs map[string]string) K8sOption {
return func(args *k8sOptions) {
args.ExtraEnv = envs
}
}
func K8sSkipTls(isSkipTls bool) K8sOption {
return func(args *k8sOptions) {
args.IsSkipTls = isSkipTls
}
}
func K8sPtyWin(win Windows) K8sOption {
return func(args *k8sOptions) {
args.win = win
}
}