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
|
package pods
import (
"encoding/json"
"errors"
"fmt"
"os"
"path/filepath"
"github.com/containers/common/pkg/completion"
"github.com/containers/common/pkg/report"
"github.com/containers/podman/v4/cmd/podman/common"
"github.com/containers/podman/v4/cmd/podman/registry"
"github.com/containers/podman/v4/cmd/podman/utils"
"github.com/containers/podman/v4/pkg/domain/entities"
systemDefine "github.com/containers/podman/v4/pkg/systemd/define"
"github.com/sirupsen/logrus"
"github.com/spf13/cobra"
)
const (
startTimeoutFlagName = "start-timeout"
stopTimeoutFlagName = "stop-timeout"
stopTimeoutCompatFlagName = "time"
restartPolicyFlagName = "restart-policy"
restartSecFlagName = "restart-sec"
newFlagName = "new"
wantsFlagName = "wants"
afterFlagName = "after"
requiresFlagName = "requires"
)
var (
files bool
format string
systemdRestart string
systemdRestartSec uint
startTimeout uint
stopTimeout uint
systemdOptions = entities.GenerateSystemdOptions{}
systemdDescription = `Generate systemd units for a pod or container.
The generated units can later be controlled via systemctl(1).`
systemdCmd = &cobra.Command{
Use: "systemd [options] {CONTAINER|POD}",
Short: "Generate systemd units.",
Long: systemdDescription,
RunE: systemd,
Args: cobra.ExactArgs(1),
ValidArgsFunction: common.AutocompleteContainersAndPods,
Example: `podman generate systemd CTR
podman generate systemd --new --time 10 CTR
podman generate systemd --files --name POD`,
}
)
func init() {
registry.Commands = append(registry.Commands, registry.CliCommand{
Command: systemdCmd,
Parent: generateCmd,
})
flags := systemdCmd.Flags()
flags.BoolVarP(&systemdOptions.Name, "name", "n", false, "Use container/pod names instead of IDs")
flags.BoolVarP(&files, "files", "f", false, "Generate .service files instead of printing to stdout")
flags.BoolVar(&systemdOptions.TemplateUnitFile, "template", false, "Make it a template file and use %i and %I specifiers. Working only for containers")
flags.UintVarP(&startTimeout, startTimeoutFlagName, "", 0, "Start timeout override")
_ = systemdCmd.RegisterFlagCompletionFunc(startTimeoutFlagName, completion.AutocompleteNone)
// NOTE: initially, there was only a --time/-t flag which mapped to
// stop-timeout. To remain backwards compatible create a hidden flag
// that maps to StopTimeout.
flags.UintVarP(&stopTimeout, stopTimeoutFlagName, "", containerConfig.Engine.StopTimeout, "Stop timeout override")
_ = systemdCmd.RegisterFlagCompletionFunc(stopTimeoutFlagName, completion.AutocompleteNone)
flags.UintVarP(&stopTimeout, stopTimeoutCompatFlagName, "t", containerConfig.Engine.StopTimeout, "Backwards alias for --stop-timeout")
_ = flags.MarkHidden("time")
flags.BoolVar(&systemdOptions.New, newFlagName, false, "Create a new container or pod instead of starting an existing one")
flags.BoolVarP(&systemdOptions.NoHeader, "no-header", "", false, "Skip header generation")
containerPrefixFlagName := "container-prefix"
flags.StringVar(&systemdOptions.ContainerPrefix, containerPrefixFlagName, "container", "Systemd unit name prefix for containers")
_ = systemdCmd.RegisterFlagCompletionFunc(containerPrefixFlagName, completion.AutocompleteNone)
podPrefixFlagName := "pod-prefix"
flags.StringVar(&systemdOptions.PodPrefix, podPrefixFlagName, "pod", "Systemd unit name prefix for pods")
_ = systemdCmd.RegisterFlagCompletionFunc(podPrefixFlagName, completion.AutocompleteNone)
separatorFlagName := "separator"
flags.StringVar(&systemdOptions.Separator, separatorFlagName, "-", "Systemd unit name separator between name/id and prefix")
_ = systemdCmd.RegisterFlagCompletionFunc(separatorFlagName, completion.AutocompleteNone)
flags.StringVar(&systemdRestart, restartPolicyFlagName, systemDefine.DefaultRestartPolicy, "Systemd restart-policy")
_ = systemdCmd.RegisterFlagCompletionFunc(restartPolicyFlagName, common.AutocompleteSystemdRestartOptions)
flags.UintVarP(&systemdRestartSec, restartSecFlagName, "", 0, "Systemd restart-sec")
_ = systemdCmd.RegisterFlagCompletionFunc(restartSecFlagName, completion.AutocompleteNone)
formatFlagName := "format"
flags.StringVar(&format, formatFlagName, "", "Print the created units in specified format (json)")
_ = systemdCmd.RegisterFlagCompletionFunc(formatFlagName, common.AutocompleteFormat(nil))
flags.StringArrayVar(&systemdOptions.Wants, wantsFlagName, nil, "Add (weak) requirement dependencies to the generated unit file")
_ = systemdCmd.RegisterFlagCompletionFunc(wantsFlagName, completion.AutocompleteNone)
flags.StringArrayVar(&systemdOptions.After, afterFlagName, nil, "Add dependencies order to the generated unit file")
_ = systemdCmd.RegisterFlagCompletionFunc(afterFlagName, completion.AutocompleteNone)
flags.StringArrayVar(&systemdOptions.Requires, requiresFlagName, nil, "Similar to wants, but declares stronger requirement dependencies")
_ = systemdCmd.RegisterFlagCompletionFunc(requiresFlagName, completion.AutocompleteNone)
flags.SetNormalizeFunc(utils.TimeoutAliasFlags)
}
func systemd(cmd *cobra.Command, args []string) error {
if cmd.Flags().Changed(restartPolicyFlagName) {
systemdOptions.RestartPolicy = &systemdRestart
}
if registry.IsRemote() {
logrus.Warnln("The generated units should be placed on your remote system")
}
if cmd.Flags().Changed(newFlagName) && !systemdOptions.New && systemdOptions.TemplateUnitFile {
return errors.New("--template cannot be set with --new=false")
}
if !systemdOptions.New && systemdOptions.TemplateUnitFile {
systemdOptions.New = true
}
if cmd.Flags().Changed(restartSecFlagName) {
systemdOptions.RestartSec = &systemdRestartSec
}
if cmd.Flags().Changed(startTimeoutFlagName) {
systemdOptions.StartTimeout = &startTimeout
}
setStopTimeout := 0
if cmd.Flags().Changed(stopTimeoutFlagName) {
setStopTimeout++
}
if cmd.Flags().Changed(stopTimeoutCompatFlagName) {
setStopTimeout++
}
switch setStopTimeout {
case 1:
systemdOptions.StopTimeout = &stopTimeout
case 2:
return fmt.Errorf("%s and %s are redundant and cannot be used together", stopTimeoutFlagName, stopTimeoutCompatFlagName)
}
reports, err := registry.ContainerEngine().GenerateSystemd(registry.GetContext(), args[0], systemdOptions)
if err != nil {
return err
}
if files {
cwd, err := os.Getwd()
if err != nil {
return fmt.Errorf("error getting current working directory: %w", err)
}
for name, content := range reports.Units {
path := filepath.Join(cwd, fmt.Sprintf("%s.service", name))
f, err := os.Create(path)
if err != nil {
return err
}
_, err = f.WriteString(content)
if err != nil {
return err
}
err = f.Close()
if err != nil {
return err
}
// add newline if default format is given
if format == "" {
path += "\n"
}
// modify in place so we can print the
// paths when --files is set
reports.Units[name] = path
}
}
switch {
case report.IsJSON(format):
return printJSON(reports.Units)
case format == "":
return printDefault(reports.Units)
default:
return fmt.Errorf("unknown --format argument: %s", format)
}
}
func printDefault(units map[string]string) error {
for _, content := range units {
fmt.Print(content)
}
return nil
}
func printJSON(units map[string]string) error {
b, err := json.MarshalIndent(units, "", " ")
if err != nil {
return err
}
fmt.Println(string(b))
return nil
}
|
