summaryrefslogtreecommitdiff
path: root/cmd/podman/start.go
blob: d17a78268076eeb19c708a20da4ffea0d4939bb0 (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
package main

import (
	"fmt"
	"os"

	"github.com/containers/libpod/cmd/podman/cliconfig"
	"github.com/containers/libpod/cmd/podman/libpodruntime"
	"github.com/containers/libpod/libpod"
	opentracing "github.com/opentracing/opentracing-go"
	"github.com/pkg/errors"
	"github.com/sirupsen/logrus"
	"github.com/spf13/cobra"
)

var (
	startCommand     cliconfig.StartValues
	startDescription = `Starts one or more containers.  The container name or ID can be used.`

	_startCommand = &cobra.Command{
		Use:   "start [flags] CONTAINER [CONTAINER...]",
		Short: "Start one or more containers",
		Long:  startDescription,
		RunE: func(cmd *cobra.Command, args []string) error {
			startCommand.InputArgs = args
			startCommand.GlobalFlags = MainGlobalOpts
			return startCmd(&startCommand)
		},
		Example: `podman start --latest
  podman start 860a4b231279 5421ab43b45
  podman start --interactive --attach imageID`,
	}
)

func init() {
	startCommand.Command = _startCommand
	startCommand.SetHelpTemplate(HelpTemplate())
	startCommand.SetUsageTemplate(UsageTemplate())
	flags := startCommand.Flags()
	flags.BoolVarP(&startCommand.Attach, "attach", "a", false, "Attach container's STDOUT and STDERR")
	flags.StringVar(&startCommand.DetachKeys, "detach-keys", "", "Override the key sequence for detaching a container. Format is a single character [a-Z] or ctrl-<value> where <value> is one of: a-z, @, ^, [, , or _")
	flags.BoolVarP(&startCommand.Interactive, "interactive", "i", false, "Keep STDIN open even if not attached")
	flags.BoolVarP(&startCommand.Latest, "latest", "l", false, "Act on the latest container podman is aware of")
	flags.BoolVar(&startCommand.SigProxy, "sig-proxy", false, "Proxy received signals to the process (default true if attaching, false otherwise)")
	markFlagHiddenForRemoteClient("latest", flags)
}

func startCmd(c *cliconfig.StartValues) error {
	if c.Bool("trace") {
		span, _ := opentracing.StartSpanFromContext(Ctx, "startCmd")
		defer span.Finish()
	}

	args := c.InputArgs
	if len(args) < 1 && !c.Latest {
		return errors.Errorf("you must provide at least one container name or id")
	}

	attach := c.Attach

	if len(args) > 1 && attach {
		return errors.Errorf("you cannot start and attach multiple containers at once")
	}

	sigProxy := c.SigProxy || attach

	if sigProxy && !attach {
		return errors.Wrapf(libpod.ErrInvalidArg, "you cannot use sig-proxy without --attach")
	}

	runtime, err := libpodruntime.GetRuntime(&c.PodmanCommand)
	if err != nil {
		return errors.Wrapf(err, "error creating libpod runtime")
	}
	defer runtime.Shutdown(false)
	if c.Latest {
		lastCtr, err := runtime.GetLatestContainer()
		if err != nil {
			return errors.Wrapf(err, "unable to get latest container")
		}
		args = append(args, lastCtr.ID())
	}

	ctx := getContext()

	var lastError error
	for _, container := range args {
		ctr, err := runtime.LookupContainer(container)
		if err != nil {
			if lastError != nil {
				fmt.Fprintln(os.Stderr, lastError)
			}
			lastError = errors.Wrapf(err, "unable to find container %s", container)
			continue
		}

		ctrState, err := ctr.State()
		if err != nil {
			return errors.Wrapf(err, "unable to get container state")
		}

		ctrRunning := ctrState == libpod.ContainerStateRunning

		if attach {
			inputStream := os.Stdin
			if !c.Interactive {
				inputStream = nil
			}

			// attach to the container and also start it not already running
			// If the container is in a pod, also set to recursively start dependencies
			err = startAttachCtr(ctr, os.Stdout, os.Stderr, inputStream, c.DetachKeys, sigProxy, !ctrRunning, ctr.PodID() != "")
			if errors.Cause(err) == libpod.ErrDetach {
				// User manually detached
				// Exit cleanly immediately
				exitCode = 0
				return nil
			}

			if ctrRunning {
				return err
			}

			if err != nil {
				return errors.Wrapf(err, "unable to start container %s", ctr.ID())
			}

			if ecode, err := ctr.Wait(); err != nil {
				if errors.Cause(err) == libpod.ErrNoSuchCtr {
					// The container may have been removed
					// Go looking for an exit file
					rtc, err := runtime.GetConfig()
					if err != nil {
						return err
					}
					ctrExitCode, err := readExitFile(rtc.TmpDir, ctr.ID())
					if err != nil {
						logrus.Errorf("Cannot get exit code: %v", err)
						exitCode = 127
					} else {
						exitCode = ctrExitCode
					}
				}
			} else {
				exitCode = int(ecode)
			}

			return nil
		}
		if ctrRunning {
			fmt.Println(ctr.ID())
			continue
		}
		// Handle non-attach start
		// If the container is in a pod, also set to recursively start dependencies
		if err := ctr.Start(ctx, ctr.PodID() != ""); err != nil {
			if lastError != nil {
				fmt.Fprintln(os.Stderr, lastError)
			}
			lastError = errors.Wrapf(err, "unable to start container %q", container)
			continue
		}
		fmt.Println(container)
	}

	return lastError
}