aboutsummaryrefslogtreecommitdiff
path: root/cmd/podman/restart.go
blob: 341cbf9780a209f8d73b80ef038d3336b252b2dc (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
package main

import (
	"fmt"
	"os"

	"github.com/containers/libpod/cmd/podman/cliconfig"
	"github.com/containers/libpod/cmd/podman/libpodruntime"
	"github.com/containers/libpod/cmd/podman/shared"
	"github.com/containers/libpod/libpod"
	"github.com/containers/libpod/pkg/rootless"
	"github.com/pkg/errors"
	"github.com/sirupsen/logrus"
	"github.com/spf13/cobra"
)

var (
	restartCommand     cliconfig.RestartValues
	restartDescription = `Restarts one or more running containers. The container ID or name can be used.

  A timeout before forcibly stopping can be set, but defaults to 10 seconds.`
	_restartCommand = &cobra.Command{
		Use:   "restart [flags] CONTAINER [CONTAINER...]",
		Short: "Restart one or more containers",
		Long:  restartDescription,
		RunE: func(cmd *cobra.Command, args []string) error {
			restartCommand.InputArgs = args
			restartCommand.GlobalFlags = MainGlobalOpts
			return restartCmd(&restartCommand)
		},
		Args: func(cmd *cobra.Command, args []string) error {
			return checkAllAndLatest(cmd, args, false)
		},
		Example: `podman restart ctrID
  podman restart --latest
  podman restart ctrID1 ctrID2`,
	}
)

func init() {
	restartCommand.Command = _restartCommand
	restartCommand.SetHelpTemplate(HelpTemplate())
	restartCommand.SetUsageTemplate(UsageTemplate())
	flags := restartCommand.Flags()
	flags.BoolVarP(&restartCommand.All, "all", "a", false, "Restart all non-running containers")
	flags.BoolVarP(&restartCommand.Latest, "latest", "l", false, "Act on the latest container podman is aware of")
	flags.BoolVar(&restartCommand.Running, "running", false, "Restart only running containers when --all is used")
	flags.UintVarP(&restartCommand.Timeout, "timeout", "t", libpod.CtrRemoveTimeout, "Seconds to wait for stop before killing the container")
	flags.UintVar(&restartCommand.Timeout, "time", libpod.CtrRemoveTimeout, "Seconds to wait for stop before killing the container")

	markFlagHiddenForRemoteClient("latest", flags)
}

func restartCmd(c *cliconfig.RestartValues) error {
	var (
		restartFuncs      []shared.ParallelWorkerInput
		containers        []*libpod.Container
		restartContainers []*libpod.Container
	)

	if os.Geteuid() != 0 {
		rootless.SetSkipStorageSetup(true)
	}

	args := c.InputArgs
	runOnly := c.Running
	all := c.All
	if len(args) < 1 && !c.Latest && !all {
		return errors.Wrapf(libpod.ErrInvalidArg, "you must provide at least one container name or ID")
	}

	runtime, err := libpodruntime.GetRuntime(&c.PodmanCommand)
	if err != nil {
		return errors.Wrapf(err, "error creating libpod runtime")
	}
	defer runtime.Shutdown(false)

	timeout := c.Timeout
	useTimeout := c.Flag("timeout").Changed || c.Flag("time").Changed

	// Handle --latest
	if c.Latest {
		lastCtr, err := runtime.GetLatestContainer()
		if err != nil {
			return errors.Wrapf(err, "unable to get latest container")
		}
		restartContainers = append(restartContainers, lastCtr)
	} else if runOnly {
		containers, err = getAllOrLatestContainers(&c.PodmanCommand, runtime, libpod.ContainerStateRunning, "running")
		if err != nil {
			return err
		}
		restartContainers = append(restartContainers, containers...)
	} else if all {
		containers, err = runtime.GetAllContainers()
		if err != nil {
			return err
		}
		restartContainers = append(restartContainers, containers...)
	} else {
		for _, id := range args {
			ctr, err := runtime.LookupContainer(id)
			if err != nil {
				return err
			}
			restartContainers = append(restartContainers, ctr)
		}
	}

	maxWorkers := shared.Parallelize("restart")
	if c.GlobalIsSet("max-workers") {
		maxWorkers = c.GlobalFlags.MaxWorks
	}

	logrus.Debugf("Setting maximum workers to %d", maxWorkers)

	if rootless.IsRootless() {
		// With rootless containers we cannot really restart an existing container
		// as we would need to join the mount namespace as well to be able to reuse
		// the storage.
		if err := stopRootlessContainers(restartContainers, timeout, useTimeout, maxWorkers); err != nil {
			return err
		}
		became, ret, err := rootless.BecomeRootInUserNS()
		if err != nil {
			return err
		}
		if became {
			os.Exit(ret)
		}
	}

	// We now have a slice of all the containers to be restarted. Iterate them to
	// create restart Funcs with a timeout as needed
	for _, ctr := range restartContainers {
		con := ctr
		ctrTimeout := ctr.StopTimeout()
		if useTimeout {
			ctrTimeout = timeout
		}

		f := func() error {
			return con.RestartWithTimeout(getContext(), ctrTimeout)
		}

		restartFuncs = append(restartFuncs, shared.ParallelWorkerInput{
			ContainerID:  con.ID(),
			ParallelFunc: f,
		})
	}

	restartErrors, errCount := shared.ParallelExecuteWorkerPool(maxWorkers, restartFuncs)
	return printParallelOutput(restartErrors, errCount)
}

func stopRootlessContainers(stopContainers []*libpod.Container, timeout uint, useTimeout bool, maxWorkers int) error {
	var stopFuncs []shared.ParallelWorkerInput
	for _, ctr := range stopContainers {
		state, err := ctr.State()
		if err != nil {
			return err
		}
		if state != libpod.ContainerStateRunning {
			continue
		}

		ctrTimeout := ctr.StopTimeout()
		if useTimeout {
			ctrTimeout = timeout
		}

		c := ctr
		f := func() error {
			return c.StopWithTimeout(ctrTimeout)
		}

		stopFuncs = append(stopFuncs, shared.ParallelWorkerInput{
			ContainerID:  c.ID(),
			ParallelFunc: f,
		})

		restartErrors, errCount := shared.ParallelExecuteWorkerPool(maxWorkers, stopFuncs)
		var lastError error
		for _, result := range restartErrors {
			if result != nil {
				if errCount > 1 {
					fmt.Println(result.Error())
				}
				lastError = result
			}
		}
		if lastError != nil {
			return lastError
		}
	}
	return nil
}