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
|
package main
import (
"fmt"
"os"
"strconv"
"strings"
"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/cri-o/ocicni/pkg/ocicni"
"github.com/docker/go-connections/nat"
"github.com/pkg/errors"
"github.com/sirupsen/logrus"
"github.com/urfave/cli"
)
var (
// Kernel namespaces shared by default within a pod
DefaultKernelNamespaces = "cgroup,ipc,net,uts"
)
var podCreateDescription = "Creates a new empty pod. The pod ID is then" +
" printed to stdout. You can then start it at any time with the" +
" podman pod start <pod_id> command. The pod will be created with the" +
" initial state 'created'."
var podCreateFlags = []cli.Flag{
cli.StringFlag{
Name: "cgroup-parent",
Usage: "Set parent cgroup for the pod",
},
cli.BoolTFlag{
Name: "infra",
Usage: "Create an infra container associated with the pod to share namespaces with",
},
cli.StringFlag{
Name: "infra-image",
Usage: "The image of the infra container to associate with the pod",
Value: libpod.DefaultInfraImage,
},
cli.StringFlag{
Name: "infra-command",
Usage: "The command to run on the infra container when the pod is started",
Value: libpod.DefaultInfraCommand,
},
cli.StringSliceFlag{
Name: "label-file",
Usage: "Read in a line delimited file of labels (default [])",
},
cli.StringSliceFlag{
Name: "label, l",
Usage: "Set metadata on pod (default [])",
},
cli.StringFlag{
Name: "name, n",
Usage: "Assign a name to the pod",
},
cli.StringFlag{
Name: "pod-id-file",
Usage: "Write the pod ID to the file",
},
cli.StringSliceFlag{
Name: "publish, p",
Usage: "Publish a container's port, or a range of ports, to the host (default [])",
},
cli.StringFlag{
Name: "share",
Usage: "A comma delimited list of kernel namespaces the pod will share",
Value: DefaultKernelNamespaces,
},
}
var podCreateCommand = cli.Command{
Name: "create",
Usage: "Create a new empty pod",
Description: podCreateDescription,
Flags: sortFlags(podCreateFlags),
Action: podCreateCmd,
SkipArgReorder: true,
UseShortOptionHandling: true,
OnUsageError: usageErrorHandler,
}
func podCreateCmd(c *cli.Context) error {
var options []libpod.PodCreateOption
var err error
if err = validateFlags(c, createFlags); err != nil {
return err
}
runtime, err := libpodruntime.GetRuntime(c)
if err != nil {
return errors.Wrapf(err, "error creating libpod runtime")
}
defer runtime.Shutdown(false)
var podIdFile *os.File
if c.IsSet("pod-id-file") && os.Geteuid() == 0 {
podIdFile, err = libpod.OpenExclusiveFile(c.String("pod-id-file"))
if err != nil && os.IsExist(err) {
return errors.Errorf("pod id file exists. Ensure another pod is not using it or delete %s", c.String("pod-id-file"))
}
if err != nil {
return errors.Errorf("error opening pod-id-file %s", c.String("pod-id-file"))
}
defer podIdFile.Close()
defer podIdFile.Sync()
}
if len(c.StringSlice("publish")) > 0 {
if !c.BoolT("infra") {
return errors.Errorf("you must have an infra container to publish port bindings to the host")
}
if rootless.IsRootless() {
return errors.Errorf("rootless networking does not allow port binding to the host")
}
}
if !c.BoolT("infra") && c.IsSet("share") && c.String("share") != "none" && c.String("share") != "" {
return errors.Errorf("You cannot share kernel namespaces on the pod level without an infra container")
}
if c.IsSet("cgroup-parent") {
options = append(options, libpod.WithPodCgroupParent(c.String("cgroup-parent")))
}
labels, err := getAllLabels(c.StringSlice("label-file"), c.StringSlice("label"))
if err != nil {
return errors.Wrapf(err, "unable to process labels")
}
if len(labels) != 0 {
options = append(options, libpod.WithPodLabels(labels))
}
if c.IsSet("name") {
options = append(options, libpod.WithPodName(c.String("name")))
}
if c.BoolT("infra") {
options = append(options, libpod.WithInfraContainer())
nsOptions, err := shared.GetNamespaceOptions(strings.Split(c.String("share"), ","))
if err != nil {
return err
}
options = append(options, nsOptions...)
}
if len(c.StringSlice("publish")) > 0 {
portBindings, err := CreatePortBindings(c.StringSlice("publish"))
if err != nil {
return err
}
options = append(options, libpod.WithInfraContainerPorts(portBindings))
}
// always have containers use pod cgroups
// User Opt out is not yet supported
options = append(options, libpod.WithPodCgroups())
ctx := getContext()
pod, err := runtime.NewPod(ctx, options...)
if err != nil {
return err
}
if podIdFile != nil {
_, err = podIdFile.WriteString(pod.ID())
if err != nil {
logrus.Error(err)
}
}
fmt.Printf("%s\n", pod.ID())
return nil
}
// CreatePortBindings iterates ports mappings and exposed ports into a format CNI understands
func CreatePortBindings(ports []string) ([]ocicni.PortMapping, error) {
var portBindings []ocicni.PortMapping
// The conversion from []string to natBindings is temporary while mheon reworks the port
// deduplication code. Eventually that step will not be required.
_, natBindings, err := nat.ParsePortSpecs(ports)
if err != nil {
return nil, err
}
for containerPb, hostPb := range natBindings {
var pm ocicni.PortMapping
pm.ContainerPort = int32(containerPb.Int())
for _, i := range hostPb {
var hostPort int
var err error
pm.HostIP = i.HostIP
if i.HostPort == "" {
hostPort = containerPb.Int()
} else {
hostPort, err = strconv.Atoi(i.HostPort)
if err != nil {
return nil, errors.Wrapf(err, "unable to convert host port to integer")
}
}
pm.HostPort = int32(hostPort)
pm.Protocol = containerPb.Proto()
portBindings = append(portBindings, pm)
}
}
return portBindings, nil
}
|
