summaryrefslogtreecommitdiff
path: root/cmd/podman/inspect/inspect.go
blob: e36fd9e0d80e56d4673b65c6de8286294704bd7f (plain)
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
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
package inspect

import (
	"context"
	"encoding/json" // due to a bug in json-iterator it cannot be used here
	"fmt"
	"os"
	"regexp"
	"strings"
	"text/template"

	"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/validate"
	"github.com/containers/podman/v4/libpod/define"
	"github.com/containers/podman/v4/pkg/domain/entities"
	"github.com/pkg/errors"
	"github.com/sirupsen/logrus"
	"github.com/spf13/cobra"
)

// AddInspectFlagSet takes a command and adds the inspect flags and returns an
// InspectOptions object.
func AddInspectFlagSet(cmd *cobra.Command) *entities.InspectOptions {
	opts := entities.InspectOptions{}

	flags := cmd.Flags()
	flags.BoolVarP(&opts.Size, "size", "s", false, "Display total file size")

	formatFlagName := "format"
	flags.StringVarP(&opts.Format, formatFlagName, "f", "json", "Format the output to a Go template or json")
	_ = cmd.RegisterFlagCompletionFunc(formatFlagName, completion.AutocompleteNone)

	typeFlagName := "type"
	flags.StringVarP(&opts.Type, typeFlagName, "t", common.AllType, "Specify inspect-object type")
	_ = cmd.RegisterFlagCompletionFunc(typeFlagName, common.AutocompleteInspectType)

	validate.AddLatestFlag(cmd, &opts.Latest)
	return &opts
}

// Inspect inspects the specified container/image/pod/volume names or IDs.
func Inspect(namesOrIDs []string, options entities.InspectOptions) error {
	inspector, err := newInspector(options)
	if err != nil {
		return err
	}
	return inspector.inspect(namesOrIDs)
}

// inspector allows for inspecting images and containers.
type inspector struct {
	containerEngine entities.ContainerEngine
	imageEngine     entities.ImageEngine
	options         entities.InspectOptions
	podOptions      entities.PodInspectOptions
}

// newInspector creates a new inspector based on the specified options.
func newInspector(options entities.InspectOptions) (*inspector, error) {
	switch options.Type {
	case common.ImageType, common.ContainerType, common.AllType, common.PodType, common.NetworkType, common.VolumeType:
		// Valid types.
	default:
		return nil, errors.Errorf("invalid type %q: must be %q, %q, %q, %q, %q, or %q", options.Type,
			common.ImageType, common.ContainerType, common.PodType, common.NetworkType, common.VolumeType, common.AllType)
	}
	if options.Type == common.ImageType {
		if options.Latest {
			return nil, errors.Errorf("latest is not supported for type %q", common.ImageType)
		}
		if options.Size {
			return nil, errors.Errorf("size is not supported for type %q", common.ImageType)
		}
	}
	if options.Type == common.PodType && options.Size {
		return nil, errors.Errorf("size is not supported for type %q", common.PodType)
	}
	podOpts := entities.PodInspectOptions{
		Latest: options.Latest,
		Format: options.Format,
	}
	return &inspector{
		containerEngine: registry.ContainerEngine(),
		imageEngine:     registry.ImageEngine(),
		options:         options,
		podOptions:      podOpts,
	}, nil
}

// inspect inspects the specified container/image names or IDs.
func (i *inspector) inspect(namesOrIDs []string) error {
	// data - dumping place for inspection results.
	var data []interface{} // nolint
	var errs []error
	ctx := context.Background()

	if len(namesOrIDs) == 0 {
		if !i.options.Latest && !i.options.All {
			return errors.New("no names or ids specified")
		}
	}

	tmpType := i.options.Type
	if i.options.Latest {
		if len(namesOrIDs) > 0 {
			return errors.New("--latest and arguments cannot be used together")
		}
		if i.options.Type == common.AllType {
			tmpType = common.ContainerType // -l works with --type=all, defaults to containertype
		}
	}

	// Inspect - note that AllType requires us to expensively query one-by-one.
	switch tmpType {
	case common.AllType:
		allData, allErrs, err := i.inspectAll(ctx, namesOrIDs)
		if err != nil {
			return err
		}
		data = allData
		errs = allErrs
	case common.ImageType:
		imgData, allErrs, err := i.imageEngine.Inspect(ctx, namesOrIDs, i.options)
		if err != nil {
			return err
		}
		errs = allErrs
		for i := range imgData {
			data = append(data, imgData[i])
		}
	case common.ContainerType:
		ctrData, allErrs, err := i.containerEngine.ContainerInspect(ctx, namesOrIDs, i.options)
		if err != nil {
			return err
		}
		errs = allErrs
		for i := range ctrData {
			data = append(data, ctrData[i])
		}
	case common.PodType:
		for _, pod := range namesOrIDs {
			i.podOptions.NameOrID = pod
			podData, err := i.containerEngine.PodInspect(ctx, i.podOptions)
			if err != nil {
				cause := errors.Cause(err)
				if !strings.Contains(cause.Error(), define.ErrNoSuchPod.Error()) {
					errs = []error{err}
				} else {
					return err
				}
			} else {
				errs = nil
				data = append(data, podData)
			}
		}
		if i.podOptions.Latest { // latest means there are no names in the namesOrID array
			podData, err := i.containerEngine.PodInspect(ctx, i.podOptions)
			if err != nil {
				cause := errors.Cause(err)
				if !strings.Contains(cause.Error(), define.ErrNoSuchPod.Error()) {
					errs = []error{err}
				} else {
					return err
				}
			} else {
				errs = nil
				data = append(data, podData)
			}
		}
	case common.NetworkType:
		networkData, allErrs, err := registry.ContainerEngine().NetworkInspect(ctx, namesOrIDs, i.options)
		if err != nil {
			return err
		}
		errs = allErrs
		for i := range networkData {
			data = append(data, networkData[i])
		}
	case common.VolumeType:
		volumeData, allErrs, err := i.containerEngine.VolumeInspect(ctx, namesOrIDs, i.options)
		if err != nil {
			return err
		}
		errs = allErrs
		for i := range volumeData {
			data = append(data, volumeData[i])
		}
	default:
		return errors.Errorf("invalid type %q: must be %q, %q, %q, %q, %q, or %q", i.options.Type,
			common.ImageType, common.ContainerType, common.PodType, common.NetworkType, common.VolumeType, common.AllType)
	}
	// Always print an empty array
	if data == nil {
		data = []interface{}{}
	}

	var err error
	switch {
	case report.IsJSON(i.options.Format) || i.options.Format == "":
		err = printJSON(data)
	default:
		// Landing here implies user has given a custom --format
		row := inspectNormalize(i.options.Format)
		row = report.NormalizeFormat(row)
		row = report.EnforceRange(row)
		err = printTmpl(tmpType, row, data)
	}
	if err != nil {
		logrus.Errorf("Printing inspect output: %v", err)
	}

	if len(errs) > 0 {
		if len(errs) > 1 {
			for _, err := range errs[1:] {
				fmt.Fprintf(os.Stderr, "error inspecting object: %v\n", err)
			}
		}
		return errors.Errorf("inspecting object: %v", errs[0])
	}
	return nil
}

func printJSON(data []interface{}) error {
	enc := json.NewEncoder(os.Stdout)
	// by default, json marshallers will force utf=8 from
	// a string. this breaks healthchecks that use <,>, &&.
	enc.SetEscapeHTML(false)
	enc.SetIndent("", "     ")
	return enc.Encode(data)
}

func printTmpl(typ, row string, data []interface{}) error {
	// We cannot use c/common/reports here, too many levels of interface{}
	t, err := template.New(typ + " inspect").Funcs(template.FuncMap(report.DefaultFuncs)).Parse(row)
	if err != nil {
		return err
	}

	w, err := report.NewWriterDefault(os.Stdout)
	if err != nil {
		return err
	}
	err = t.Execute(w, data)
	w.Flush()
	return err
}

func (i *inspector) inspectAll(ctx context.Context, namesOrIDs []string) ([]interface{}, []error, error) {
	var data []interface{} // nolint
	allErrs := []error{}
	for _, name := range namesOrIDs {
		ctrData, errs, err := i.containerEngine.ContainerInspect(ctx, []string{name}, i.options)
		if err != nil {
			return nil, nil, err
		}
		if len(errs) == 0 {
			data = append(data, ctrData[0])
			continue
		}
		imgData, errs, err := i.imageEngine.Inspect(ctx, []string{name}, i.options)
		if err != nil {
			return nil, nil, err
		}
		if len(errs) == 0 {
			data = append(data, imgData[0])
			continue
		}
		volumeData, errs, err := i.containerEngine.VolumeInspect(ctx, []string{name}, i.options)
		if err != nil {
			return nil, nil, err
		}
		if len(errs) == 0 {
			data = append(data, volumeData[0])
			continue
		}
		networkData, errs, err := registry.ContainerEngine().NetworkInspect(ctx, namesOrIDs, i.options)
		if err != nil {
			return nil, nil, err
		}
		if len(errs) == 0 {
			data = append(data, networkData[0])
			continue
		}
		i.podOptions.NameOrID = name
		podData, err := i.containerEngine.PodInspect(ctx, i.podOptions)
		if err != nil {
			cause := errors.Cause(err)
			if !strings.Contains(cause.Error(), define.ErrNoSuchPod.Error()) {
				return nil, nil, err
			}
		} else {
			data = append(data, podData)
			continue
		}
		if len(errs) > 0 {
			allErrs = append(allErrs, errors.Errorf("no such object: %q", name))
			continue
		}
	}
	return data, allErrs, nil
}

func inspectNormalize(row string) string {
	m := regexp.MustCompile(`{{\s*\.Id\s*}}`)
	row = m.ReplaceAllString(row, "{{.ID}}")

	r := strings.NewReplacer(
		".Src", ".Source",
		".Dst", ".Destination",
		".ImageID", ".Image",
	)
	return r.Replace(row)
}