generated from kubernetes/kubernetes-template-project
-
Notifications
You must be signed in to change notification settings - Fork 190
/
exec.go
247 lines (211 loc) · 6.27 KB
/
exec.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
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
/*
Copyright 2023 The Kubernetes 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 runtime
import (
"bytes"
"context"
"fmt"
"os"
"strconv"
"strings"
"sigs.k8s.io/kwok/pkg/kwokctl/dryrun"
"sigs.k8s.io/kwok/pkg/log"
"sigs.k8s.io/kwok/pkg/utils/exec"
"sigs.k8s.io/kwok/pkg/utils/file"
"sigs.k8s.io/kwok/pkg/utils/path"
"sigs.k8s.io/kwok/pkg/utils/version"
)
// ForkExec forks a new process and execs the given command.
// The process will be terminated when the context is canceled.
func (c *Cluster) ForkExec(ctx context.Context, dir string, name string, args ...string) error {
pidPath := path.Join(dir, "pids", path.OnlyName(name)+".pid")
if file.Exists(pidPath) {
pidData, err := os.ReadFile(pidPath)
if err == nil {
pid, err := strconv.Atoi(string(pidData))
if err == nil {
if exec.IsRunning(pid) {
return nil
}
}
}
}
ctx = exec.WithDir(ctx, dir)
ctx = exec.WithFork(ctx, true)
logPath := path.Join(dir, "logs", path.OnlyName(name)+".log")
logFile, err := c.OpenFile(logPath)
if err != nil {
return fmt.Errorf("open log file %s: %w", logPath, err)
}
ctx = exec.WithIOStreams(ctx, exec.IOStreams{
Out: logFile,
ErrOut: logFile,
})
if c.IsDryRun() {
dryrun.PrintMessage("%s", FormatExec(ctx, name, args...))
dryrun.PrintMessage("echo $! >%s", pidPath)
return nil
}
cmd, err := exec.Command(ctx, name, args...)
if err != nil {
return err
}
err = c.WriteFile(pidPath, []byte(strconv.Itoa(cmd.Process.Pid)))
if err != nil {
return fmt.Errorf("write pid file %s: %w", pidPath, err)
}
return nil
}
// ForkExecKill kills the process if it is running.
func (c *Cluster) ForkExecKill(ctx context.Context, dir string, name string) error {
pidPath := path.Join(dir, "pids", path.OnlyName(name)+".pid")
if !file.Exists(pidPath) {
// No pid file exists, which means the process has been terminated
logger := log.FromContext(ctx)
logger.Debug("Stat file not exists",
"path", pidPath,
)
return nil
}
if c.IsDryRun() {
dryrun.PrintMessage("kill $(cat %s)", pidPath)
} else {
raw, err := os.ReadFile(pidPath)
if err != nil {
return fmt.Errorf("read pid file %s: %w", pidPath, err)
}
pid, err := strconv.Atoi(string(raw))
if err != nil {
return fmt.Errorf("parse pid file %s: %w", pidPath, err)
}
err = exec.KillProcess(pid)
if err != nil {
return err
}
}
err := c.Remove(pidPath)
if err != nil {
return err
}
return nil
}
// ForkExecIsRunning checks if the process is running.
func (c *Cluster) ForkExecIsRunning(ctx context.Context, dir string, name string) bool {
pidPath := path.Join(dir, "pids", path.OnlyName(name)+".pid")
if !file.Exists(pidPath) {
logger := log.FromContext(ctx)
logger.Debug("Stat file not exists",
"path", pidPath,
)
return false
}
pidData, err := os.ReadFile(pidPath)
if err != nil {
logger := log.FromContext(ctx)
logger.Error("Read pid file", err)
return false
}
pid, err := strconv.Atoi(string(pidData))
if err != nil {
return false
}
return exec.IsRunning(pid)
}
// PullImages is a helper function to pull images
func (c *Cluster) PullImages(ctx context.Context, command string, images []string, quiet bool) error {
if c.IsDryRun() {
for _, image := range images {
dryrun.PrintMessage("%s pull %s", command, image)
}
return nil
}
return exec.PullImages(ctx, command, images, quiet)
}
// EnsureImage ensures the image exists.
func (c *Cluster) EnsureImage(ctx context.Context, command string, image string) error {
if c.IsDryRun() {
dryrun.PrintMessage("%s pull %s", command, image)
return nil
}
config, err := c.Config(ctx)
if err != nil {
return err
}
conf := config.Options
return exec.PullImage(ctx, command, image, conf.QuietPull)
}
// Exec executes the given command and returns the output.
func (c *Cluster) Exec(ctx context.Context, name string, args ...string) error {
if c.IsDryRun() {
dryrun.PrintMessage("%s", FormatExec(ctx, name, args...))
return nil
}
return exec.Exec(ctx, name, args...)
}
// ParseVersionFromBinary parses the version from the given binary.
func (c *Cluster) ParseVersionFromBinary(ctx context.Context, path string) (version.Version, error) {
if c.IsDryRun() {
return version.Unknown, nil
}
return exec.ParseVersionFromBinary(ctx, path)
}
// ParseVersionFromImage parses the version from the image.
func (c *Cluster) ParseVersionFromImage(ctx context.Context, runtime string, image string, command string) (version.Version, error) {
if c.IsDryRun() {
return version.Unknown, nil
}
return exec.ParseVersionFromImage(ctx, runtime, image, command)
}
// WriteToPath writes the output of a command to a specified file
func (c *Cluster) WriteToPath(ctx context.Context, path string, commands []string) error {
if c.IsDryRun() {
dryrun.PrintMessage("%s >%s", strings.Join(commands, " "), path)
return nil
}
buf := bytes.NewBuffer(nil)
err := exec.Exec(exec.WithAllWriteTo(ctx, buf), commands[0], commands[1:]...)
if err != nil {
return err
}
return file.Write(path, buf.Bytes())
}
// FormatExec prints the command to be executed to the output stream.
func FormatExec(ctx context.Context, name string, args ...string) string {
opt := exec.GetExecOptions(ctx)
out := bytes.NewBuffer(nil)
if opt.Dir != "" {
_, _ = fmt.Fprintf(out, "cd %s && ", opt.Dir)
}
if len(opt.Env) != 0 {
_, _ = fmt.Fprintf(out, "%s ", strings.Join(opt.Env, " "))
}
_, _ = fmt.Fprintf(out, "%s", path.OnlyName(name))
for _, arg := range args {
_, _ = fmt.Fprintf(out, " %s", arg)
}
outfile, ok := dryrun.IsCatToFileWriter(opt.Out)
if ok {
_, _ = fmt.Fprintf(out, " >%s", outfile)
}
if erroutfile, ok := dryrun.IsCatToFileWriter(opt.ErrOut); ok {
if erroutfile == outfile {
_, _ = fmt.Fprintf(out, " 2>&1")
} else {
_, _ = fmt.Fprintf(out, " 2>%s", outfile)
}
}
if opt.Fork {
_, _ = fmt.Fprintf(out, " &")
}
return out.String()
}