-
Notifications
You must be signed in to change notification settings - Fork 66
/
start.go
230 lines (195 loc) · 7.58 KB
/
start.go
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
package daemon
import (
"fmt"
"net/http"
"runtime"
"strings"
"syscall"
"time"
"google.golang.org/grpc"
"github.com/Sirupsen/logrus"
apierrors "github.com/docker/docker/api/errors"
"github.com/docker/docker/api/types"
containertypes "github.com/docker/docker/api/types/container"
"github.com/docker/docker/container"
"github.com/docker/docker/runconfig"
)
// ContainerStart starts a container.
func (daemon *Daemon) ContainerStart(name string, hostConfig *containertypes.HostConfig, checkpoint string, checkpointDir string) error {
if checkpoint != "" && !daemon.HasExperimental() {
return apierrors.NewBadRequestError(fmt.Errorf("checkpoint is only supported in experimental mode"))
}
container, err := daemon.GetContainer(name)
if err != nil {
return err
}
if container.IsPaused() {
return fmt.Errorf("Cannot start a paused container, try unpause instead.")
}
if container.IsRunning() {
err := fmt.Errorf("Container already started")
return apierrors.NewErrorWithStatusCode(err, http.StatusNotModified)
}
// Windows does not have the backwards compatibility issue here.
if runtime.GOOS != "windows" {
// This is kept for backward compatibility - hostconfig should be passed when
// creating a container, not during start.
if hostConfig != nil {
logrus.Warn("DEPRECATED: Setting host configuration options when the container starts is deprecated and has been removed in Docker 1.12")
oldNetworkMode := container.HostConfig.NetworkMode
if err := daemon.setSecurityOptions(container, hostConfig); err != nil {
return err
}
if err := daemon.mergeAndVerifyLogConfig(&hostConfig.LogConfig); err != nil {
return err
}
if err := daemon.setHostConfig(container, hostConfig); err != nil {
return err
}
newNetworkMode := container.HostConfig.NetworkMode
if string(oldNetworkMode) != string(newNetworkMode) {
// if user has change the network mode on starting, clean up the
// old networks. It is a deprecated feature and has been removed in Docker 1.12
container.NetworkSettings.Networks = nil
if err := container.ToDisk(); err != nil {
return err
}
}
container.InitDNSHostConfig()
}
} else {
if hostConfig != nil {
return fmt.Errorf("Supplying a hostconfig on start is not supported. It should be supplied on create")
}
}
// check if hostConfig is in line with the current system settings.
// It may happen cgroups are umounted or the like.
if _, err = daemon.verifyContainerSettings(container.HostConfig, nil, false); err != nil {
return err
}
// Adapt for old containers in case we have updates in this function and
// old containers never have chance to call the new function in create stage.
if hostConfig != nil {
if err := daemon.adaptContainerSettings(container.HostConfig, false); err != nil {
return err
}
}
return daemon.containerStart(container, checkpoint, checkpointDir, true)
}
// Start starts a container
func (daemon *Daemon) Start(container *container.Container) error {
return daemon.containerStart(container, "", "", true)
}
// containerStart prepares the container to run by setting up everything the
// container needs, such as storage and networking, as well as links
// between containers. The container is left waiting for a signal to
// begin running.
func (daemon *Daemon) containerStart(container *container.Container, checkpoint string, checkpointDir string, resetRestartManager bool) (err error) {
start := time.Now()
container.Lock()
defer container.Unlock()
if resetRestartManager && container.Running { // skip this check if already in restarting step and resetRestartManager==false
return nil
}
if container.RemovalInProgress || container.Dead {
return fmt.Errorf("Container is marked for removal and cannot be started.")
}
// if we encounter an error during start we need to ensure that any other
// setup has been cleaned up properly
defer func() {
if err != nil {
container.SetError(err)
// if no one else has set it, make sure we don't leave it at zero
if container.ExitCode() == 0 {
container.SetExitCode(128)
}
container.ToDisk()
container.Reset(false)
daemon.Cleanup(container)
// if containers AutoRemove flag is set, remove it after clean up
if container.HostConfig.AutoRemove {
container.Unlock()
if err := daemon.ContainerRm(container.ID, &types.ContainerRmConfig{ForceRemove: true, RemoveVolume: true}); err != nil {
logrus.Errorf("can't remove container %s: %v", container.ID, err)
}
container.Lock()
}
}
}()
if err := daemon.conditionalMountOnStart(container); err != nil {
return err
}
// Make sure NetworkMode has an acceptable value. We do this to ensure
// backwards API compatibility.
container.HostConfig = runconfig.SetDefaultNetModeIfBlank(container.HostConfig)
if err := daemon.initializeNetworking(container); err != nil {
return err
}
spec, err := daemon.createSpec(container)
if err != nil {
return err
}
createOptions, err := daemon.getLibcontainerdCreateOptions(container)
if err != nil {
return err
}
if resetRestartManager {
container.ResetRestartManager(true)
}
if checkpointDir == "" {
checkpointDir = container.CheckpointDir()
}
if err := daemon.containerd.Create(container.ID, checkpoint, checkpointDir, *spec, container.InitializeStdio, createOptions...); err != nil {
errDesc := grpc.ErrorDesc(err)
contains := func(s1, s2 string) bool {
return strings.Contains(strings.ToLower(s1), s2)
}
logrus.Errorf("Create container failed with error: %s", errDesc)
// if we receive an internal error from the initial start of a container then lets
// return it instead of entering the restart loop
// set to 127 for container cmd not found/does not exist)
if contains(errDesc, container.Path) &&
(contains(errDesc, "executable file not found") ||
contains(errDesc, "no such file or directory") ||
contains(errDesc, "system cannot find the file specified")) {
container.SetExitCode(127)
}
// set to 126 for container cmd can't be invoked errors
if contains(errDesc, syscall.EACCES.Error()) {
container.SetExitCode(126)
}
// attempted to mount a file onto a directory, or a directory onto a file, maybe from user specified bind mounts
if contains(errDesc, syscall.ENOTDIR.Error()) {
errDesc += ": Are you trying to mount a directory onto a file (or vice-versa)? Check if the specified host path exists and is the expected type"
container.SetExitCode(127)
}
return fmt.Errorf("%s", errDesc)
}
containerActions.WithValues("start").UpdateSince(start)
return nil
}
// Cleanup releases any network resources allocated to the container along with any rules
// around how containers are linked together. It also unmounts the container's root filesystem.
func (daemon *Daemon) Cleanup(container *container.Container) {
daemon.releaseNetwork(container)
container.UnmountIpcMounts(detachMounted)
if err := daemon.conditionalUnmountOnCleanup(container); err != nil {
// FIXME: remove once reference counting for graphdrivers has been refactored
// Ensure that all the mounts are gone
if mountid, err := daemon.layerStore.GetMountID(container.ID); err == nil {
daemon.cleanupMountsByID(mountid)
}
}
if err := container.UnmountSecrets(); err != nil {
logrus.Warnf("%s cleanup: failed to unmount secrets: %s", container.ID, err)
}
for _, eConfig := range container.ExecCommands.Commands() {
daemon.unregisterExecCommand(container, eConfig)
}
if container.BaseFS != "" {
if err := container.UnmountVolumes(daemon.LogVolumeEvent); err != nil {
logrus.Warnf("%s cleanup: Failed to umount volumes: %v", container.ID, err)
}
}
container.CancelAttachContext()
}