summaryrefslogtreecommitdiff
path: root/pkg/domain/infra/abi/play.go
blob: 3b5c141d70497145f80779b11e34a47de17b79a1 (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
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
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
package abi

import (
	"bytes"
	"context"
	"fmt"
	"io"
	"io/ioutil"
	"os"
	"strings"

	"github.com/containers/common/pkg/secrets"
	"github.com/containers/image/v5/types"
	"github.com/containers/podman/v3/libpod"
	"github.com/containers/podman/v3/libpod/define"
	"github.com/containers/podman/v3/libpod/image"
	"github.com/containers/podman/v3/pkg/domain/entities"
	"github.com/containers/podman/v3/pkg/specgen/generate"
	"github.com/containers/podman/v3/pkg/specgen/generate/kube"
	"github.com/containers/podman/v3/pkg/util"
	"github.com/docker/distribution/reference"
	"github.com/ghodss/yaml"
	"github.com/pkg/errors"
	"github.com/sirupsen/logrus"
	yamlv3 "gopkg.in/yaml.v3"
	v1apps "k8s.io/api/apps/v1"
	v1 "k8s.io/api/core/v1"
)

func (ic *ContainerEngine) PlayKube(ctx context.Context, path string, options entities.PlayKubeOptions) (*entities.PlayKubeReport, error) {
	report := &entities.PlayKubeReport{}
	validKinds := 0

	// read yaml document
	content, err := ioutil.ReadFile(path)
	if err != nil {
		return nil, err
	}

	// split yaml document
	documentList, err := splitMultiDocYAML(content)
	if err != nil {
		return nil, err
	}

	// create pod on each document if it is a pod or deployment
	// any other kube kind will be skipped
	for _, document := range documentList {
		kind, err := getKubeKind(document)
		if err != nil {
			return nil, errors.Wrapf(err, "unable to read %q as kube YAML", path)
		}

		switch kind {
		case "Pod":
			var podYAML v1.Pod
			var podTemplateSpec v1.PodTemplateSpec

			if err := yaml.Unmarshal(document, &podYAML); err != nil {
				return nil, errors.Wrapf(err, "unable to read YAML %q as Kube Pod", path)
			}

			podTemplateSpec.ObjectMeta = podYAML.ObjectMeta
			podTemplateSpec.Spec = podYAML.Spec

			r, err := ic.playKubePod(ctx, podTemplateSpec.ObjectMeta.Name, &podTemplateSpec, options)
			if err != nil {
				return nil, err
			}

			report.Pods = append(report.Pods, r.Pods...)
			validKinds++
		case "Deployment":
			var deploymentYAML v1apps.Deployment

			if err := yaml.Unmarshal(document, &deploymentYAML); err != nil {
				return nil, errors.Wrapf(err, "unable to read YAML %q as Kube Deployment", path)
			}

			r, err := ic.playKubeDeployment(ctx, &deploymentYAML, options)
			if err != nil {
				return nil, err
			}

			report.Pods = append(report.Pods, r.Pods...)
			validKinds++
		default:
			logrus.Infof("kube kind %s not supported", kind)
			continue
		}
	}

	if validKinds == 0 {
		return nil, fmt.Errorf("YAML document does not contain any supported kube kind")
	}

	return report, nil
}

func (ic *ContainerEngine) playKubeDeployment(ctx context.Context, deploymentYAML *v1apps.Deployment, options entities.PlayKubeOptions) (*entities.PlayKubeReport, error) {
	var (
		deploymentName string
		podSpec        v1.PodTemplateSpec
		numReplicas    int32
		i              int32
		report         entities.PlayKubeReport
	)

	deploymentName = deploymentYAML.ObjectMeta.Name
	if deploymentName == "" {
		return nil, errors.Errorf("Deployment does not have a name")
	}
	numReplicas = 1
	if deploymentYAML.Spec.Replicas != nil {
		numReplicas = *deploymentYAML.Spec.Replicas
	}
	podSpec = deploymentYAML.Spec.Template

	// create "replicas" number of pods
	for i = 0; i < numReplicas; i++ {
		podName := fmt.Sprintf("%s-pod-%d", deploymentName, i)
		podReport, err := ic.playKubePod(ctx, podName, &podSpec, options)
		if err != nil {
			return nil, errors.Wrapf(err, "error encountered while bringing up pod %s", podName)
		}
		report.Pods = append(report.Pods, podReport.Pods...)
	}
	return &report, nil
}

func (ic *ContainerEngine) playKubePod(ctx context.Context, podName string, podYAML *v1.PodTemplateSpec, options entities.PlayKubeOptions) (*entities.PlayKubeReport, error) {
	var (
		registryCreds *types.DockerAuthConfig
		writer        io.Writer
		playKubePod   entities.PlayKubePod
		report        entities.PlayKubeReport
	)

	// Create the secret manager before hand
	secretsManager, err := secrets.NewManager(ic.Libpod.GetSecretsStorageDir())
	if err != nil {
		return nil, err
	}

	// check for name collision between pod and container
	if podName == "" {
		return nil, errors.Errorf("pod does not have a name")
	}
	for _, n := range podYAML.Spec.Containers {
		if n.Name == podName {
			playKubePod.Logs = append(playKubePod.Logs,
				fmt.Sprintf("a container exists with the same name (%q) as the pod in your YAML file; changing pod name to %s_pod\n", podName, podName))
			podName = fmt.Sprintf("%s_pod", podName)
		}
	}

	p, err := kube.ToPodGen(ctx, podName, podYAML)
	if err != nil {
		return nil, err
	}
	if options.Network != "" {
		switch strings.ToLower(options.Network) {
		case "bridge", "host":
			return nil, errors.Errorf("invalid value passed to --network: bridge or host networking must be configured in YAML")
		case "":
			return nil, errors.Errorf("invalid value passed to --network: must provide a comma-separated list of CNI networks")
		default:
			// We'll assume this is a comma-separated list of CNI
			// networks.
			networks := strings.Split(options.Network, ",")
			logrus.Debugf("Pod joining CNI networks: %v", networks)
			p.CNINetworks = append(p.CNINetworks, networks...)
		}
	}

	// Create the Pod
	pod, err := generate.MakePod(p, ic.Libpod)
	if err != nil {
		return nil, err
	}

	podInfraID, err := pod.InfraContainerID()
	if err != nil {
		return nil, err
	}

	if !options.Quiet {
		writer = os.Stderr
	}

	if len(options.Username) > 0 && len(options.Password) > 0 {
		registryCreds = &types.DockerAuthConfig{
			Username: options.Username,
			Password: options.Password,
		}
	}

	dockerRegistryOptions := image.DockerRegistryOptions{
		DockerRegistryCreds:         registryCreds,
		DockerCertPath:              options.CertDir,
		DockerInsecureSkipTLSVerify: options.SkipTLSVerify,
	}

	volumes, err := kube.InitializeVolumes(podYAML.Spec.Volumes)
	if err != nil {
		return nil, err
	}

	seccompPaths, err := kube.InitializeSeccompPaths(podYAML.ObjectMeta.Annotations, options.SeccompProfileRoot)
	if err != nil {
		return nil, err
	}

	var ctrRestartPolicy string
	switch podYAML.Spec.RestartPolicy {
	case v1.RestartPolicyAlways:
		ctrRestartPolicy = define.RestartPolicyAlways
	case v1.RestartPolicyOnFailure:
		ctrRestartPolicy = define.RestartPolicyOnFailure
	case v1.RestartPolicyNever:
		ctrRestartPolicy = define.RestartPolicyNo
	default: // Default to Always
		ctrRestartPolicy = define.RestartPolicyAlways
	}

	configMaps := []v1.ConfigMap{}
	for _, p := range options.ConfigMaps {
		f, err := os.Open(p)
		if err != nil {
			return nil, err
		}
		defer f.Close()

		cm, err := readConfigMapFromFile(f)
		if err != nil {
			return nil, errors.Wrapf(err, "%q", p)
		}

		configMaps = append(configMaps, cm)
	}

	containers := make([]*libpod.Container, 0, len(podYAML.Spec.Containers))
	for _, container := range podYAML.Spec.Containers {
		pullPolicy := util.PullImageMissing
		if len(container.ImagePullPolicy) > 0 {
			pullPolicy, err = util.ValidatePullType(string(container.ImagePullPolicy))
			if err != nil {
				return nil, err
			}
		}
		named, err := reference.ParseNormalizedNamed(container.Image)
		if err != nil {
			return nil, errors.Wrapf(err, "Failed to parse image %q", container.Image)
		}
		// In kube, if the image is tagged with latest, it should always pull
		// but if the domain is localhost, that means the image was built locally
		// so do not attempt a pull.
		if tagged, isTagged := named.(reference.NamedTagged); isTagged {
			if tagged.Tag() == image.LatestTag && reference.Domain(named) != image.DefaultLocalRegistry {
				pullPolicy = util.PullImageAlways
			}
		}

		// This ensures the image is the image store
		newImage, err := ic.Libpod.ImageRuntime().New(ctx, container.Image, options.SignaturePolicy, options.Authfile, writer, &dockerRegistryOptions, image.SigningOptions{}, nil, pullPolicy, nil)
		if err != nil {
			return nil, err
		}

		specgenOpts := kube.CtrSpecGenOptions{
			Container:      container,
			Image:          newImage,
			Volumes:        volumes,
			PodID:          pod.ID(),
			PodName:        podName,
			PodInfraID:     podInfraID,
			ConfigMaps:     configMaps,
			SeccompPaths:   seccompPaths,
			RestartPolicy:  ctrRestartPolicy,
			NetNSIsHost:    p.NetNS.IsHost(),
			SecretsManager: secretsManager,
		}
		specGen, err := kube.ToSpecGen(ctx, &specgenOpts)
		if err != nil {
			return nil, err
		}

		ctr, err := generate.MakeContainer(ctx, ic.Libpod, specGen)
		if err != nil {
			return nil, err
		}
		containers = append(containers, ctr)
	}

	if options.Start != types.OptionalBoolFalse {
		// Start the containers
		podStartErrors, err := pod.Start(ctx)
		if err != nil && errors.Cause(err) != define.ErrPodPartialFail {
			return nil, err
		}
		for id, err := range podStartErrors {
			playKubePod.ContainerErrors = append(playKubePod.ContainerErrors, errors.Wrapf(err, "error starting container %s", id).Error())
		}
	}

	playKubePod.ID = pod.ID()
	for _, ctr := range containers {
		playKubePod.Containers = append(playKubePod.Containers, ctr.ID())
	}

	report.Pods = append(report.Pods, playKubePod)

	return &report, nil
}

// readConfigMapFromFile returns a kubernetes configMap obtained from --configmap flag
func readConfigMapFromFile(r io.Reader) (v1.ConfigMap, error) {
	var cm v1.ConfigMap

	content, err := ioutil.ReadAll(r)
	if err != nil {
		return cm, errors.Wrapf(err, "unable to read ConfigMap YAML content")
	}

	if err := yaml.Unmarshal(content, &cm); err != nil {
		return cm, errors.Wrapf(err, "unable to read YAML as Kube ConfigMap")
	}

	if cm.Kind != "ConfigMap" {
		return cm, errors.Errorf("invalid YAML kind: %q. [ConfigMap] is the only supported by --configmap", cm.Kind)
	}

	return cm, nil
}

// splitMultiDocYAML reads mutiple documents in a YAML file and
// returns them as a list.
func splitMultiDocYAML(yamlContent []byte) ([][]byte, error) {
	var documentList [][]byte

	d := yamlv3.NewDecoder(bytes.NewReader(yamlContent))
	for {
		var o interface{}
		// read individual document
		err := d.Decode(&o)
		if err == io.EOF {
			break
		}
		if err != nil {
			return nil, errors.Wrapf(err, "multi doc yaml could not be split")
		}

		if o != nil {
			// back to bytes
			document, err := yamlv3.Marshal(o)
			if err != nil {
				return nil, errors.Wrapf(err, "individual doc yaml could not be marshalled")
			}

			documentList = append(documentList, document)
		}
	}

	return documentList, nil
}

// getKubeKind unmarshals a kube YAML document and returns its kind.
func getKubeKind(obj []byte) (string, error) {
	var kubeObject v1.ObjectReference

	if err := yaml.Unmarshal(obj, &kubeObject); err != nil {
		return "", err
	}

	return kubeObject.Kind, nil
}