aboutsummaryrefslogtreecommitdiff
path: root/pkg/domain/infra/abi/system.go
blob: 57c098166db91689996ce9fc57deadd66258d1e3 (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
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
package abi

import (
	"context"
	"fmt"
	"io/ioutil"
	"os"
	"os/exec"
	"path/filepath"
	"strconv"
	"strings"

	"github.com/containers/common/pkg/config"
	"github.com/containers/podman/v2/libpod/define"
	"github.com/containers/podman/v2/pkg/cgroups"
	"github.com/containers/podman/v2/pkg/domain/entities"
	"github.com/containers/podman/v2/pkg/rootless"
	"github.com/containers/podman/v2/pkg/util"
	"github.com/containers/podman/v2/utils"
	"github.com/pkg/errors"
	"github.com/sirupsen/logrus"
	"github.com/spf13/cobra"
	"github.com/spf13/pflag"
)

func (ic *ContainerEngine) Info(ctx context.Context) (*define.Info, error) {
	info, err := ic.Libpod.Info()
	if err != nil {
		return nil, err
	}
	xdg, err := util.GetRuntimeDir()
	if err != nil {
		return nil, err
	}
	if len(xdg) == 0 {
		// If no xdg is returned, assume root socket
		xdg = "/run"
	}

	// Glue the socket path together
	socketPath := filepath.Join(xdg, "podman", "podman.sock")
	rs := define.RemoteSocket{
		Path:   socketPath,
		Exists: false,
	}

	// Check if the socket exists
	if fi, err := os.Stat(socketPath); err == nil {
		if fi.Mode()&os.ModeSocket != 0 {
			rs.Exists = true
		}
	}
	// TODO
	// it was suggested future versions of this could perform
	// a ping on the socket for greater confidence the socket is
	// actually active.
	info.Host.RemoteSocket = &rs
	return info, err
}

func (ic *ContainerEngine) SetupRootless(_ context.Context, cmd *cobra.Command) error {
	// do it only after podman has already re-execed and running with uid==0.
	if os.Geteuid() == 0 {
		ownsCgroup, err := cgroups.UserOwnsCurrentSystemdCgroup()
		if err != nil {
			logrus.Warnf("Failed to detect the owner for the current cgroup: %v", err)
		}
		if !ownsCgroup {
			conf, err := ic.Config(context.Background())
			if err != nil {
				return err
			}

			initCommand, err := ioutil.ReadFile("/proc/1/comm")
			// On errors, default to systemd
			runsUnderSystemd := err != nil || strings.TrimRight(string(initCommand), "\n") == "systemd"

			unitName := fmt.Sprintf("podman-%d.scope", os.Getpid())
			if runsUnderSystemd || conf.Engine.CgroupManager == config.SystemdCgroupsManager {
				if err := utils.RunUnderSystemdScope(os.Getpid(), "user.slice", unitName); err != nil {
					logrus.Warnf("Failed to add podman to systemd sandbox cgroup: %v", err)
				}
			}
		}
		return nil
	}

	pausePidPath, err := util.GetRootlessPauseProcessPidPath()
	if err != nil {
		return errors.Wrapf(err, "could not get pause process pid file path")
	}

	became, ret, err := rootless.TryJoinPauseProcess(pausePidPath)
	if err != nil {
		return err
	}
	if became {
		os.Exit(ret)
	}

	// if there is no pid file, try to join existing containers, and create a pause process.
	ctrs, err := ic.Libpod.GetRunningContainers()
	if err != nil {
		logrus.Error(err.Error())
		os.Exit(1)
	}

	paths := []string{}
	for _, ctr := range ctrs {
		paths = append(paths, ctr.Config().ConmonPidFile)
	}

	became, ret, err = rootless.TryJoinFromFilePaths(pausePidPath, true, paths)
	if err := movePauseProcessToScope(); err != nil {
		conf, err := ic.Config(context.Background())
		if err != nil {
			return err
		}
		if conf.Engine.CgroupManager == config.SystemdCgroupsManager {
			logrus.Warnf("Failed to add pause process to systemd sandbox cgroup: %v", err)
		} else {
			logrus.Debugf("Failed to add pause process to systemd sandbox cgroup: %v", err)
		}
	}
	if err != nil {
		logrus.Error(err)
		os.Exit(1)
	}
	if became {
		os.Exit(ret)
	}
	return nil
}

func movePauseProcessToScope() error {
	pausePidPath, err := util.GetRootlessPauseProcessPidPath()
	if err != nil {
		return errors.Wrapf(err, "could not get pause process pid file path")
	}

	data, err := ioutil.ReadFile(pausePidPath)
	if err != nil {
		return errors.Wrapf(err, "cannot read pause pid file")
	}
	pid, err := strconv.ParseUint(string(data), 10, 0)
	if err != nil {
		return errors.Wrapf(err, "cannot parse pid file %s", pausePidPath)
	}

	return utils.RunUnderSystemdScope(int(pid), "user.slice", "podman-pause.scope")
}

// checkInput can be used to verify any of the globalopt values
func checkInput() error { // nolint:deadcode,unused
	return nil
}

// SystemPrune removes unused data from the system. Pruning pods, containers, volumes and images.
func (ic *ContainerEngine) SystemPrune(ctx context.Context, options entities.SystemPruneOptions) (*entities.SystemPruneReport, error) {
	var systemPruneReport = new(entities.SystemPruneReport)
	podPruneReport, err := ic.prunePodHelper(ctx)
	if err != nil {
		return nil, err
	}
	systemPruneReport.PodPruneReport = podPruneReport

	containerPruneReport, err := ic.pruneContainersHelper(nil)
	if err != nil {
		return nil, err
	}
	systemPruneReport.ContainerPruneReport = containerPruneReport

	results, err := ic.Libpod.ImageRuntime().PruneImages(ctx, options.All, nil)
	if err != nil {
		return nil, err
	}
	report := entities.ImagePruneReport{
		Report: entities.Report{
			Id:  results,
			Err: nil,
		},
	}

	systemPruneReport.ImagePruneReport = &report

	if options.Volume {
		volumePruneReport, err := ic.pruneVolumesHelper(ctx)
		if err != nil {
			return nil, err
		}
		systemPruneReport.VolumePruneReport = volumePruneReport
	}
	return systemPruneReport, nil
}

func (ic *ContainerEngine) SystemDf(ctx context.Context, options entities.SystemDfOptions) (*entities.SystemDfReport, error) {
	var (
		dfImages = []*entities.SystemDfImageReport{}
	)

	// Compute disk-usage stats for all local images.
	imgs, err := ic.Libpod.ImageRuntime().GetImages()
	if err != nil {
		return nil, err
	}

	imageStats, err := ic.Libpod.ImageRuntime().DiskUsage(ctx, imgs)
	if err != nil {
		return nil, err
	}

	for _, stat := range imageStats {
		report := entities.SystemDfImageReport{
			Repository: stat.Repository,
			Tag:        stat.Tag,
			ImageID:    stat.ID,
			Created:    stat.Created,
			Size:       int64(stat.Size),
			SharedSize: int64(stat.SharedSize),
			UniqueSize: int64(stat.UniqueSize),
			Containers: stat.Containers,
		}
		dfImages = append(dfImages, &report)
	}

	// Get Containers and iterate them
	cons, err := ic.Libpod.GetAllContainers()
	if err != nil {
		return nil, err
	}
	dfContainers := make([]*entities.SystemDfContainerReport, 0, len(cons))
	for _, c := range cons {
		iid, _ := c.Image()
		conSize, err := c.RootFsSize()
		if err != nil {
			return nil, err
		}
		state, err := c.State()
		if err != nil {
			return nil, err
		}
		rwsize, err := c.RWSize()
		if err != nil {
			return nil, err
		}
		report := entities.SystemDfContainerReport{
			ContainerID:  c.ID(),
			Image:        iid,
			Command:      c.Command(),
			LocalVolumes: len(c.UserVolumes()),
			RWSize:       rwsize,
			Size:         conSize,
			Created:      c.CreatedTime(),
			Status:       state.String(),
			Names:        c.Name(),
		}
		dfContainers = append(dfContainers, &report)
	}

	//	Get volumes and iterate them
	vols, err := ic.Libpod.GetAllVolumes()
	if err != nil {
		return nil, err
	}

	running, err := ic.Libpod.GetRunningContainers()
	if err != nil {
		return nil, err
	}
	runningContainers := make([]string, 0, len(running))
	for _, c := range running {
		runningContainers = append(runningContainers, c.ID())
	}

	dfVolumes := make([]*entities.SystemDfVolumeReport, 0, len(vols))
	var reclaimableSize int64
	for _, v := range vols {
		var consInUse int
		volSize, err := sizeOfPath(v.MountPoint())
		if err != nil {
			return nil, err
		}
		inUse, err := v.VolumeInUse()
		if err != nil {
			return nil, err
		}
		if len(inUse) == 0 {
			reclaimableSize += volSize
		}
		for _, viu := range inUse {
			if util.StringInSlice(viu, runningContainers) {
				consInUse++
			}
		}
		report := entities.SystemDfVolumeReport{
			VolumeName:      v.Name(),
			Links:           consInUse,
			Size:            volSize,
			ReclaimableSize: reclaimableSize,
		}
		dfVolumes = append(dfVolumes, &report)
	}
	return &entities.SystemDfReport{
		Images:     dfImages,
		Containers: dfContainers,
		Volumes:    dfVolumes,
	}, nil
}

// sizeOfPath determines the file usage of a given path. it was called volumeSize in v1
// and now is made to be generic and take a path instead of a libpod volume
func sizeOfPath(path string) (int64, error) {
	var size int64
	err := filepath.Walk(path, func(path string, info os.FileInfo, err error) error {
		if err == nil && !info.IsDir() {
			size += info.Size()
		}
		return err
	})
	return size, err
}

func (se *SystemEngine) Reset(ctx context.Context) error {
	return se.Libpod.Reset(ctx)
}

func (se *SystemEngine) Renumber(ctx context.Context, flags *pflag.FlagSet, config *entities.PodmanConfig) error {
	return nil
}

func (se SystemEngine) Migrate(ctx context.Context, flags *pflag.FlagSet, config *entities.PodmanConfig, options entities.SystemMigrateOptions) error {
	return nil
}

func (se SystemEngine) Shutdown(ctx context.Context) {
	if err := se.Libpod.Shutdown(false); err != nil {
		logrus.Error(err)
	}
}

func unshareEnv(graphroot, runroot string) []string {
	return append(os.Environ(), "_CONTAINERS_USERNS_CONFIGURED=done",
		fmt.Sprintf("CONTAINERS_GRAPHROOT=%s", graphroot),
		fmt.Sprintf("CONTAINERS_RUNROOT=%s", runroot))
}

func (ic *ContainerEngine) Unshare(ctx context.Context, args []string) error {
	cmd := exec.Command(args[0], args[1:]...)
	cmd.Env = unshareEnv(ic.Libpod.StorageConfig().GraphRoot, ic.Libpod.StorageConfig().RunRoot)
	cmd.Stdin = os.Stdin
	cmd.Stdout = os.Stdout
	cmd.Stderr = os.Stderr
	return cmd.Run()
}

func (ic ContainerEngine) Version(ctx context.Context) (*entities.SystemVersionReport, error) {
	var report entities.SystemVersionReport
	v, err := define.GetVersion()
	if err != nil {
		return nil, err
	}
	report.Client = &v
	return &report, err
}