forked from containerd/containerd
-
Notifications
You must be signed in to change notification settings - Fork 1
/
hcsshim.go
190 lines (165 loc) · 5.53 KB
/
hcsshim.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
//+build windows
package windows
import (
"context"
"fmt"
"os"
"path/filepath"
"strings"
"github.com/Microsoft/hcsshim"
"github.com/containerd/containerd/errdefs"
"github.com/containerd/containerd/log"
specs "github.com/opencontainers/runtime-spec/specs-go"
"github.com/pkg/errors"
)
// newContainerConfig generates a hcsshim container configuration from the
// provided OCI Spec
func newContainerConfig(ctx context.Context, owner, id string, spec *specs.Spec) (*hcsshim.ContainerConfig, error) {
if len(spec.Windows.LayerFolders) == 0 {
return nil, errors.Wrap(errdefs.ErrInvalidArgument,
"spec.Windows.LayerFolders cannot be empty")
}
var (
layerFolders = spec.Windows.LayerFolders
conf = &hcsshim.ContainerConfig{
SystemType: "Container",
Name: id,
Owner: owner,
HostName: spec.Hostname,
IgnoreFlushesDuringBoot: spec.Windows.IgnoreFlushesDuringBoot,
AllowUnqualifiedDNSQuery: spec.Windows.Network.AllowUnqualifiedDNSQuery,
EndpointList: spec.Windows.Network.EndpointList,
NetworkSharedContainerName: spec.Windows.Network.NetworkSharedContainerName,
}
)
if spec.Windows.CredentialSpec != nil {
conf.Credentials = spec.Windows.CredentialSpec.(string)
}
// TODO: use the create request Mount for those
for _, layerPath := range layerFolders {
_, filename := filepath.Split(layerPath)
guid, err := hcsshim.NameToGuid(filename)
if err != nil {
return nil, errors.Wrapf(err, "unable to get GUID for %s", filename)
}
conf.Layers = append(conf.Layers, hcsshim.Layer{
ID: guid.ToString(),
Path: layerPath,
})
}
if len(spec.Mounts) > 0 {
mds := make([]hcsshim.MappedDir, len(spec.Mounts))
for i, mount := range spec.Mounts {
mds[i] = hcsshim.MappedDir{
HostPath: mount.Source,
ContainerPath: mount.Destination,
ReadOnly: false,
}
for _, o := range mount.Options {
if strings.ToLower(o) == "ro" {
mds[i].ReadOnly = true
}
}
}
conf.MappedDirectories = mds
}
if spec.Windows.Network.DNSSearchList != nil {
conf.DNSSearchList = strings.Join(spec.Windows.Network.DNSSearchList, ",")
}
if spec.Windows.HyperV != nil {
conf.HvPartition = true
for _, layerPath := range layerFolders {
utilityVMPath := spec.Windows.HyperV.UtilityVMPath
_, err := os.Stat(utilityVMPath)
if err == nil {
conf.HvRuntime = &hcsshim.HvRuntime{ImagePath: utilityVMPath}
break
} else if !os.IsNotExist(err) {
return nil, errors.Wrapf(err, "failed to access layer %s", layerPath)
}
}
}
var (
err error
di = hcsshim.DriverInfo{
Flavour: 1, // filter driver
HomeDir: filepath.Dir(layerFolders[0]),
}
)
// TODO: Once there is a snapshotter for windows, this can be deleted.
// The R/W Layer should come from the Rootfs Mounts provided
//
// Windows doesn't support creating a container with a readonly
// filesystem, so always create a RW one
if err = hcsshim.CreateSandboxLayer(di, id, layerFolders[0], layerFolders); err != nil {
return nil, errors.Wrapf(err, "failed to create sandbox layer for %s: layers: %#v, driverInfo: %#v",
id, layerFolders, di)
}
conf.LayerFolderPath = filepath.Join(di.HomeDir, id)
defer func() {
if err != nil {
removeLayer(ctx, conf.LayerFolderPath)
}
}()
if err = hcsshim.ActivateLayer(di, id); err != nil {
return nil, errors.Wrapf(err, "failed to activate layer %s", conf.LayerFolderPath)
}
if err = hcsshim.PrepareLayer(di, id, layerFolders); err != nil {
return nil, errors.Wrapf(err, "failed to prepare layer %s", conf.LayerFolderPath)
}
conf.VolumePath, err = hcsshim.GetLayerMountPath(di, id)
if err != nil {
return nil, errors.Wrapf(err, "failed to getmount path for layer %s: driverInfo: %#v", id, di)
}
return conf, nil
}
// removeLayer deletes the given layer, all associated containers must have
// been shutdown for this to succeed.
func removeLayer(ctx context.Context, path string) error {
var (
err error
layerID = filepath.Base(path)
parentPath = filepath.Dir(path)
di = hcsshim.DriverInfo{
Flavour: 1, // filter driver
HomeDir: parentPath,
}
)
if err = hcsshim.UnprepareLayer(di, layerID); err != nil {
log.G(ctx).WithError(err).Warnf("failed to unprepare layer %s for removal", path)
}
if err = hcsshim.DeactivateLayer(di, layerID); err != nil {
log.G(ctx).WithError(err).Warnf("failed to deactivate layer %s for removal", path)
}
removePath := filepath.Join(parentPath, fmt.Sprintf("%s-removing", layerID))
if err = os.Rename(path, removePath); err != nil {
log.G(ctx).WithError(err).Warnf("failed to rename container layer %s for removal", path)
removePath = path
}
if err = hcsshim.DestroyLayer(di, removePath); err != nil {
log.G(ctx).WithError(err).Errorf("failed to remove container layer %s", removePath)
return err
}
return nil
}
func newProcessConfig(spec *specs.Process, pset *pipeSet) *hcsshim.ProcessConfig {
conf := &hcsshim.ProcessConfig{
EmulateConsole: pset.src.Terminal,
CreateStdInPipe: pset.stdin != nil,
CreateStdOutPipe: pset.stdout != nil,
CreateStdErrPipe: pset.stderr != nil,
User: spec.User.Username,
CommandLine: strings.Join(spec.Args, " "),
Environment: make(map[string]string),
WorkingDirectory: spec.Cwd,
ConsoleSize: [2]uint{spec.ConsoleSize.Height, spec.ConsoleSize.Width},
}
// Convert OCI Env format to HCS's
for _, s := range spec.Env {
arr := strings.SplitN(s, "=", 2)
if len(arr) == 2 {
conf.Environment[arr[0]] = arr[1]
}
}
return conf
}