/
pod.go
172 lines (150 loc) · 5.39 KB
/
pod.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
// Copyright 2016 The prometheus-operator 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 framework
import (
"bytes"
"context"
"fmt"
"io"
"net/http"
"net/url"
"strings"
v1 "k8s.io/api/core/v1"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
kscheme "k8s.io/client-go/kubernetes/scheme"
"k8s.io/client-go/rest"
"k8s.io/client-go/tools/portforward"
"k8s.io/client-go/tools/remotecommand"
"k8s.io/client-go/transport/spdy"
)
// PrintPodLogs prints the logs of a specified Pod.
func (f *Framework) PrintPodLogs(ctx context.Context, ns, p string) error {
pod, err := f.KubeClient.CoreV1().Pods(ns).Get(ctx, p, metav1.GetOptions{})
if err != nil {
return fmt.Errorf("failed to print logs of pod '%v': failed to get pod: %w", p, err)
}
for _, c := range pod.Spec.Containers {
req := f.KubeClient.CoreV1().Pods(ns).GetLogs(p, &v1.PodLogOptions{Container: c.Name})
resp, err := req.DoRaw(ctx)
if err != nil {
return fmt.Errorf("failed to retrieve logs of pod '%v': %w", p, err)
}
fmt.Printf("=== Logs of %v/%v/%v:", ns, p, c.Name)
fmt.Println(string(resp))
}
return nil
}
// GetPodRestartCount returns a map of container names and their restart counts for
// a given pod.
func (f *Framework) GetPodRestartCount(ctx context.Context, ns, podName string) (map[string]int32, error) {
pod, err := f.KubeClient.CoreV1().Pods(ns).Get(ctx, podName, metav1.GetOptions{})
if err != nil {
return nil, fmt.Errorf("failed to retrieve pod to get restart count: %w", err)
}
restarts := map[string]int32{}
for _, status := range pod.Status.ContainerStatuses {
restarts[status.Name] = status.RestartCount
}
return restarts, nil
}
// ExecOptions passed to ExecWithOptions.
type ExecOptions struct {
Command []string
Namespace string
PodName string
ContainerName string
Stdin io.Reader
CaptureStdout bool
CaptureStderr bool
// If false, whitespace in std{err,out} will be removed.
PreserveWhitespace bool
}
// ExecWithOptions executes a command in the specified container, returning
// stdout, stderr and error. `options` allowed for additional parameters to be
// passed. Inspired by
// https://github.com/kubernetes/kubernetes/blob/dde6e8e7465468c32642659cb708a5cc922add64/test/e2e/framework/exec_util.go#L36-L51
func (f *Framework) ExecWithOptions(ctx context.Context, options ExecOptions) (string, string, error) {
const tty = false
req := f.KubeClient.CoreV1().RESTClient().Post().
Resource("pods").
Name(options.PodName).
Namespace(options.Namespace).
SubResource("exec").
Param("container", options.ContainerName)
req.VersionedParams(&v1.PodExecOptions{
Container: options.ContainerName,
Command: options.Command,
Stdin: options.Stdin != nil,
Stdout: options.CaptureStdout,
Stderr: options.CaptureStderr,
TTY: tty,
}, kscheme.ParameterCodec)
var stdout, stderr bytes.Buffer
err := execute(ctx, "POST", req.URL(), f.RestConfig, options.Stdin, &stdout, &stderr, tty)
if options.PreserveWhitespace {
return stdout.String(), stderr.String(), err
}
return strings.TrimSpace(stdout.String()), strings.TrimSpace(stderr.String()), err
}
func execute(ctx context.Context, method string, url *url.URL, config *rest.Config, stdin io.Reader, stdout, stderr io.Writer, tty bool) error {
exec, err := remotecommand.NewSPDYExecutor(config, method, url)
if err != nil {
return err
}
return exec.StreamWithContext(ctx, remotecommand.StreamOptions{
Stdin: stdin,
Stdout: stdout,
Stderr: stderr,
Tty: tty,
})
}
// StartPortForward initiates a port forwarding connection to a pod on the
// localhost interface. It returns a closer function that should be invoked to
// stop the proxy server.
// The function blocks until the port forwarding proxy server is ready to
// receive connections or the context is canceled.
func StartPortForward(ctx context.Context, config *rest.Config, scheme string, name string, ns string, port string) (func(), error) {
roundTripper, upgrader, err := spdy.RoundTripperFor(config)
if err != nil {
return nil, err
}
path := fmt.Sprintf("/api/v1/namespaces/%s/pods/%s/portforward", ns, name)
hostIP := strings.TrimLeft(config.Host, "htps:/")
serverURL := url.URL{Scheme: scheme, Path: path, Host: hostIP}
dialer := spdy.NewDialer(upgrader, &http.Client{Transport: roundTripper}, http.MethodPost, &serverURL)
stopChan, readyChan := make(chan struct{}, 1), make(chan struct{}, 1)
out, errOut := new(bytes.Buffer), new(bytes.Buffer)
forwarder, err := portforward.New(dialer, []string{port}, stopChan, readyChan, out, errOut)
if err != nil {
return nil, err
}
forwardErr := make(chan error, 1)
go func() {
if err := forwarder.ForwardPorts(); err != nil {
forwardErr <- err
}
close(forwardErr)
}()
select {
case <-readyChan:
return func() { close(stopChan) }, nil
case <-ctx.Done():
var err error
select {
case err = <-forwardErr:
default:
}
return nil, fmt.Errorf("%v: %v", ctx.Err(), err)
}
}