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
231
232
233
234
235
236
237
238
239
240
241
242
243
244
|
package main
import (
"fmt"
"io"
"io/ioutil"
"os"
"strings"
"github.com/containers/image/types"
"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"
image2 "github.com/containers/libpod/libpod/image"
ns "github.com/containers/libpod/pkg/namespaces"
"github.com/containers/libpod/pkg/rootless"
"github.com/containers/libpod/pkg/spec"
"github.com/containers/storage"
"github.com/cri-o/ocicni/pkg/ocicni"
"github.com/ghodss/yaml"
"github.com/pkg/errors"
"github.com/sirupsen/logrus"
"github.com/spf13/cobra"
"k8s.io/api/core/v1"
)
var (
playKubeCommand cliconfig.KubePlayValues
playKubeDescription = "Play a Pod and its containers based on a Kubrernetes YAML"
_playKubeCommand = &cobra.Command{
Use: "kube",
Short: "Play a pod based on Kubernetes YAML",
Long: playKubeDescription,
RunE: func(cmd *cobra.Command, args []string) error {
playKubeCommand.InputArgs = args
playKubeCommand.GlobalFlags = MainGlobalOpts
return playKubeYAMLCmd(&playKubeCommand)
},
Example: `podman play kube demo.yml
podman play kube --cert-dir /mycertsdir --tls-verify=true --quiet myWebPod`,
}
)
func init() {
playKubeCommand.Command = _playKubeCommand
playKubeCommand.SetUsageTemplate(UsageTemplate())
flags := playKubeCommand.Flags()
flags.StringVar(&playKubeCommand.Authfile, "authfile", "", "Path of the authentication file. Default is ${XDG_RUNTIME_DIR}/containers/auth.json. Use REGISTRY_AUTH_FILE environment variable to override")
flags.StringVar(&playKubeCommand.CertDir, "cert-dir", "", "`Pathname` of a directory containing TLS certificates and keys")
flags.StringVar(&playKubeCommand.Creds, "creds", "", "`Credentials` (USERNAME:PASSWORD) to use for authenticating to a registry")
flags.BoolVarP(&playKubeCommand.Quiet, "quiet", "q", false, "Suppress output information when pulling images")
flags.StringVar(&playKubeCommand.SignaturePolicy, "signature-policy", "", "`Pathname` of signature policy file (not usually used)")
flags.BoolVar(&playKubeCommand.TlsVerify, "tls-verify", true, "Require HTTPS and verify certificates when contacting registries (default: true)")
}
func playKubeYAMLCmd(c *cliconfig.KubePlayValues) error {
var (
podOptions []libpod.PodCreateOption
podYAML v1.Pod
registryCreds *types.DockerAuthConfig
containers []*libpod.Container
writer io.Writer
)
ctx := getContext()
if rootless.IsRootless() {
return errors.Wrapf(libpod.ErrNotImplemented, "rootless users")
}
args := c.InputArgs
if len(args) > 1 {
return errors.New("you can only play one kubernetes file at a time")
}
if len(args) < 1 {
return errors.New("you must supply at least one file")
}
runtime, err := libpodruntime.GetRuntime(&c.PodmanCommand)
if err != nil {
return errors.Wrapf(err, "could not get runtime")
}
defer runtime.Shutdown(false)
content, err := ioutil.ReadFile(args[0])
if err != nil {
return err
}
if err := yaml.Unmarshal(content, &podYAML); err != nil {
return errors.Wrapf(err, "unable to read %s as YAML", args[0])
}
// check for name collision between pod and container
podName := podYAML.ObjectMeta.Name
for _, n := range podYAML.Spec.Containers {
if n.Name == podName {
fmt.Printf("a container exists with the same name (%s) as the pod in your YAML file; changing pod name to %s_pod\n", podName, podName)
podName = fmt.Sprintf("%s_pod", podName)
}
}
podOptions = append(podOptions, libpod.WithInfraContainer())
podOptions = append(podOptions, libpod.WithPodName(podName))
// TODO for now we just used the default kernel namespaces; we need to add/subtract this from yaml
nsOptions, err := shared.GetNamespaceOptions(strings.Split(DefaultKernelNamespaces, ","))
if err != nil {
return err
}
podOptions = append(podOptions, nsOptions...)
podPorts := getPodPorts(podYAML.Spec.Containers)
podOptions = append(podOptions, libpod.WithInfraContainerPorts(podPorts))
// Create the Pod
pod, err := runtime.NewPod(ctx, podOptions...)
if err != nil {
return err
}
// Print the Pod's ID
fmt.Println(pod.ID())
podInfraID, err := pod.InfraContainerID()
if err != nil {
return err
}
namespaces := map[string]string{
// Disabled during code review per mheon
//"pid": fmt.Sprintf("container:%s", podInfraID),
"net": fmt.Sprintf("container:%s", podInfraID),
"user": fmt.Sprintf("container:%s", podInfraID),
"ipc": fmt.Sprintf("container:%s", podInfraID),
"uts": fmt.Sprintf("container:%s", podInfraID),
}
if !c.Quiet {
writer = os.Stderr
}
dockerRegistryOptions := image2.DockerRegistryOptions{
DockerRegistryCreds: registryCreds,
DockerCertPath: c.CertDir,
}
if c.Flag("tls-verify").Changed {
dockerRegistryOptions.DockerInsecureSkipTLSVerify = types.NewOptionalBool(!c.TlsVerify)
}
for _, container := range podYAML.Spec.Containers {
newImage, err := runtime.ImageRuntime().New(ctx, container.Image, c.SignaturePolicy, c.Authfile, writer, &dockerRegistryOptions, image2.SigningOptions{}, false, nil)
if err != nil {
return err
}
createConfig := kubeContainerToCreateConfig(container, runtime, newImage, namespaces)
if err != nil {
return err
}
ctr, err := createContainerFromCreateConfig(runtime, createConfig, ctx, pod)
if err != nil {
return err
}
containers = append(containers, ctr)
}
// start the containers
for _, ctr := range containers {
if err := ctr.Start(ctx, true); err != nil {
// Making this a hard failure here to avoid a mess
// the other containers are in created status
return err
}
fmt.Println(ctr.ID())
}
return nil
}
// getPodPorts converts a slice of kube container descriptions to an
// array of ocicni portmapping descriptions usable in libpod
func getPodPorts(containers []v1.Container) []ocicni.PortMapping {
var infraPorts []ocicni.PortMapping
for _, container := range containers {
for _, p := range container.Ports {
portBinding := ocicni.PortMapping{
HostPort: p.HostPort,
ContainerPort: p.ContainerPort,
Protocol: strings.ToLower(string(p.Protocol)),
}
if p.HostIP != "" {
logrus.Debug("HostIP on port bindings is not supported")
}
infraPorts = append(infraPorts, portBinding)
}
}
return infraPorts
}
// kubeContainerToCreateConfig takes a v1.Container and returns a createconfig describing a container
func kubeContainerToCreateConfig(containerYAML v1.Container, runtime *libpod.Runtime, newImage *image2.Image, namespaces map[string]string) *createconfig.CreateConfig {
var (
containerConfig createconfig.CreateConfig
envs map[string]string
)
containerConfig.Runtime = runtime
containerConfig.Image = containerYAML.Image
containerConfig.ImageID = newImage.ID()
containerConfig.Name = containerYAML.Name
containerConfig.Tty = containerYAML.TTY
containerConfig.WorkDir = containerYAML.WorkingDir
if containerYAML.SecurityContext.ReadOnlyRootFilesystem != nil {
containerConfig.ReadOnlyRootfs = *containerYAML.SecurityContext.ReadOnlyRootFilesystem
}
if containerYAML.SecurityContext.Privileged != nil {
containerConfig.Privileged = *containerYAML.SecurityContext.Privileged
}
if containerYAML.SecurityContext.AllowPrivilegeEscalation != nil {
containerConfig.NoNewPrivs = !*containerYAML.SecurityContext.AllowPrivilegeEscalation
}
containerConfig.Command = containerYAML.Command
containerConfig.StopSignal = 15
// If the user does not pass in ID mappings, just set to basics
if containerConfig.IDMappings == nil {
containerConfig.IDMappings = &storage.IDMappingOptions{}
}
containerConfig.NetMode = ns.NetworkMode(namespaces["net"])
containerConfig.IpcMode = ns.IpcMode(namespaces["ipc"])
containerConfig.UtsMode = ns.UTSMode(namespaces["uts"])
// disabled in code review per mheon
//containerConfig.PidMode = ns.PidMode(namespaces["pid"])
containerConfig.UsernsMode = ns.UsernsMode(namespaces["user"])
if len(containerYAML.Env) > 0 {
envs = make(map[string]string)
}
// Environment Variables
for _, e := range containerYAML.Env {
envs[e.Name] = e.Value
}
containerConfig.Env = envs
return &containerConfig
}
|
