summaryrefslogtreecommitdiff
path: root/pkg/specgen/generate/pod_create.go
blob: d6063b9a0ddcc38c446f8bcf956d5ee8d21f2c33 (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
package generate

import (
	"context"
	"encoding/json"
	"fmt"
	"net"
	"os"
	"strconv"
	"strings"

	"github.com/containers/podman/v4/libpod"
	"github.com/containers/podman/v4/libpod/define"
	"github.com/containers/podman/v4/pkg/domain/entities"
	"github.com/containers/podman/v4/pkg/specgen"
	"github.com/containers/podman/v4/pkg/specgenutil"
	"github.com/opencontainers/runtime-spec/specs-go"
	"github.com/sirupsen/logrus"
)

func MakePod(p *entities.PodSpec, rt *libpod.Runtime) (*libpod.Pod, error) {
	if err := p.PodSpecGen.Validate(); err != nil {
		return nil, err
	}

	if p.PodSpecGen.ResourceLimits == nil {
		p.PodSpecGen.ResourceLimits = &specs.LinuxResources{}
	}

	if !p.PodSpecGen.NoInfra {
		imageName, err := PullOrBuildInfraImage(rt, p.PodSpecGen.InfraImage)
		if err != nil {
			return nil, err
		}
		p.PodSpecGen.InfraImage = imageName
		p.PodSpecGen.InfraContainerSpec.RawImageName = imageName
	}

	if !p.PodSpecGen.NoInfra && p.PodSpecGen.InfraContainerSpec != nil {
		var err error
		p.PodSpecGen.InfraContainerSpec, err = MapSpec(&p.PodSpecGen)
		if err != nil {
			return nil, err
		}
	}

	if !p.PodSpecGen.NoInfra {
		err := FinishThrottleDevices(p.PodSpecGen.InfraContainerSpec)
		if err != nil {
			return nil, err
		}
		if p.PodSpecGen.InfraContainerSpec.ResourceLimits.BlockIO != nil {
			p.PodSpecGen.ResourceLimits.BlockIO = p.PodSpecGen.InfraContainerSpec.ResourceLimits.BlockIO
		}

		weightDevices, err := WeightDevices(p.PodSpecGen.InfraContainerSpec.WeightDevice)
		if err != nil {
			return nil, err
		}

		if p.PodSpecGen.ResourceLimits != nil && len(weightDevices) > 0 {
			if p.PodSpecGen.ResourceLimits.BlockIO == nil {
				p.PodSpecGen.ResourceLimits.BlockIO = &specs.LinuxBlockIO{}
			}
			p.PodSpecGen.ResourceLimits.BlockIO.WeightDevice = weightDevices
		}
	}

	options, err := createPodOptions(&p.PodSpecGen)
	if err != nil {
		return nil, err
	}

	pod, err := rt.NewPod(context.Background(), p.PodSpecGen, options...)
	if err != nil {
		return nil, err
	}
	if !p.PodSpecGen.NoInfra && p.PodSpecGen.InfraContainerSpec != nil {
		if p.PodSpecGen.InfraContainerSpec.Name == "" {
			p.PodSpecGen.InfraContainerSpec.Name = pod.ID()[:12] + "-infra"
		}
		_, err = CompleteSpec(context.Background(), rt, p.PodSpecGen.InfraContainerSpec)
		if err != nil {
			return nil, err
		}
		p.PodSpecGen.InfraContainerSpec.User = "" // infraSpec user will get incorrectly assigned via the container creation process, overwrite here
		// infra's resource limits are used as a parsing tool,
		// we do not want infra to get these resources in its cgroup
		// make sure of that here.
		p.PodSpecGen.InfraContainerSpec.ResourceLimits = nil
		p.PodSpecGen.InfraContainerSpec.WeightDevice = nil
		rtSpec, spec, opts, err := MakeContainer(context.Background(), rt, p.PodSpecGen.InfraContainerSpec, false, nil)
		if err != nil {
			return nil, err
		}

		spec.Pod = pod.ID()
		opts = append(opts, rt.WithPod(pod))
		spec.CgroupParent = pod.CgroupParent()
		infraCtr, err := ExecuteCreate(context.Background(), rt, rtSpec, spec, true, opts...)
		if err != nil {
			return nil, err
		}
		pod, err = rt.AddInfra(context.Background(), pod, infraCtr)
		if err != nil {
			return nil, err
		}
	} else {
		// SavePod is used to save the pod state and trigger a create event even if infra is not created
		err := rt.SavePod(pod)
		if err != nil {
			return nil, err
		}
	}
	return pod, nil
}

func createPodOptions(p *specgen.PodSpecGenerator) ([]libpod.PodCreateOption, error) {
	var (
		options []libpod.PodCreateOption
	)
	if !p.NoInfra {
		options = append(options, libpod.WithInfraContainer())
		if p.ShareParent == nil || (p.ShareParent != nil && *p.ShareParent) {
			options = append(options, libpod.WithPodParent())
		}
		nsOptions, err := GetNamespaceOptions(p.SharedNamespaces, p.InfraContainerSpec.NetNS.IsHost())
		if err != nil {
			return nil, err
		}
		options = append(options, nsOptions...)
		// Use pod user and infra userns only when --userns is not set to host
		if !p.InfraContainerSpec.UserNS.IsHost() && !p.InfraContainerSpec.UserNS.IsDefault() {
			options = append(options, libpod.WithPodUser())
		}
	}

	if len(p.ServiceContainerID) > 0 {
		options = append(options, libpod.WithServiceContainer(p.ServiceContainerID))
	}

	if len(p.CgroupParent) > 0 {
		options = append(options, libpod.WithPodCgroupParent(p.CgroupParent))
	}
	if len(p.Labels) > 0 {
		options = append(options, libpod.WithPodLabels(p.Labels))
	}
	if len(p.Name) > 0 {
		options = append(options, libpod.WithPodName(p.Name))
	}
	if p.PodCreateCommand != nil {
		options = append(options, libpod.WithPodCreateCommand(p.PodCreateCommand))
	}

	if len(p.Hostname) > 0 {
		options = append(options, libpod.WithPodHostname(p.Hostname))
	}

	if p.ResourceLimits != nil {
		options = append(options, libpod.WithPodResources(*p.ResourceLimits))
	}

	options = append(options, libpod.WithPodExitPolicy(p.ExitPolicy))

	return options, nil
}

// MapSpec modifies the already filled Infra specgenerator,
// replacing necessary values with those specified in pod creation
func MapSpec(p *specgen.PodSpecGenerator) (*specgen.SpecGenerator, error) {
	if len(p.PortMappings) > 0 {
		ports, err := ParsePortMapping(p.PortMappings, nil)
		if err != nil {
			return nil, err
		}
		p.InfraContainerSpec.PortMappings = ports
	}
	switch p.NetNS.NSMode {
	case specgen.Default, "":
		if p.NoInfra {
			logrus.Debugf("No networking because the infra container is missing")
			break
		}
	case specgen.Bridge:
		p.InfraContainerSpec.NetNS.NSMode = specgen.Bridge
		logrus.Debugf("Pod using bridge network mode")
	case specgen.Private:
		p.InfraContainerSpec.NetNS.NSMode = specgen.Private
		logrus.Debugf("Pod will use default network mode")
	case specgen.Host:
		logrus.Debugf("Pod will use host networking")
		if len(p.InfraContainerSpec.PortMappings) > 0 ||
			len(p.InfraContainerSpec.Networks) > 0 ||
			p.InfraContainerSpec.NetNS.NSMode == specgen.NoNetwork {
			return nil, fmt.Errorf("cannot set host network if network-related configuration is specified: %w", define.ErrInvalidArg)
		}
		p.InfraContainerSpec.NetNS.NSMode = specgen.Host
	case specgen.Slirp:
		logrus.Debugf("Pod will use slirp4netns")
		if p.InfraContainerSpec.NetNS.NSMode != specgen.Host {
			p.InfraContainerSpec.NetworkOptions = p.NetworkOptions
			p.InfraContainerSpec.NetNS.NSMode = specgen.Slirp
		}
	case specgen.NoNetwork:
		logrus.Debugf("Pod will not use networking")
		if len(p.InfraContainerSpec.PortMappings) > 0 ||
			len(p.InfraContainerSpec.Networks) > 0 ||
			p.InfraContainerSpec.NetNS.NSMode == specgen.Host {
			return nil, fmt.Errorf("cannot disable pod network if network-related configuration is specified: %w", define.ErrInvalidArg)
		}
		p.InfraContainerSpec.NetNS.NSMode = specgen.NoNetwork
	default:
		return nil, fmt.Errorf("pods presently do not support network mode %s", p.NetNS.NSMode)
	}

	if len(p.InfraCommand) > 0 {
		p.InfraContainerSpec.Entrypoint = p.InfraCommand
	}

	if len(p.HostAdd) > 0 {
		p.InfraContainerSpec.HostAdd = p.HostAdd
	}
	if len(p.DNSServer) > 0 {
		var dnsServers []net.IP
		dnsServers = append(dnsServers, p.DNSServer...)

		p.InfraContainerSpec.DNSServers = dnsServers
	}
	if len(p.DNSOption) > 0 {
		p.InfraContainerSpec.DNSOptions = p.DNSOption
	}
	if len(p.DNSSearch) > 0 {
		p.InfraContainerSpec.DNSSearch = p.DNSSearch
	}
	if p.NoManageResolvConf {
		p.InfraContainerSpec.UseImageResolvConf = true
	}
	if len(p.Networks) > 0 {
		p.InfraContainerSpec.Networks = p.Networks
	}
	// deprecated cni networks for api users
	if len(p.CNINetworks) > 0 {
		p.InfraContainerSpec.CNINetworks = p.CNINetworks
	}
	if p.NoManageHosts {
		p.InfraContainerSpec.UseImageHosts = p.NoManageHosts
	}

	if len(p.InfraConmonPidFile) > 0 {
		p.InfraContainerSpec.ConmonPidFile = p.InfraConmonPidFile
	}

	p.InfraContainerSpec.Image = p.InfraImage
	return p.InfraContainerSpec, nil
}

func PodConfigToSpec(rt *libpod.Runtime, spec *specgen.PodSpecGenerator, infraOptions *entities.ContainerCreateOptions, id string) (p *libpod.Pod, err error) {
	pod, err := rt.LookupPod(id)
	if err != nil {
		return nil, err
	}

	infraSpec := &specgen.SpecGenerator{}
	if pod.HasInfraContainer() {
		infraID, err := pod.InfraContainerID()
		if err != nil {
			return nil, err
		}
		_, _, err = ConfigToSpec(rt, infraSpec, infraID)
		if err != nil {
			return nil, err
		}

		infraSpec.Hostname = ""
		infraSpec.CgroupParent = ""
		infraSpec.Pod = "" // remove old pod...
		infraOptions.IsClone = true
		infraOptions.IsInfra = true

		n := infraSpec.Name
		_, err = rt.LookupContainer(n + "-clone")
		if err == nil { // if we found a ctr with this name, set it so the below switch can tell
			n += "-clone"
		}

		switch {
		case strings.Contains(n, "-clone"):
			ind := strings.Index(n, "-clone") + 6
			num, err := strconv.Atoi(n[ind:])
			if num == 0 && err != nil { // clone1 is hard to get with this logic, just check for it here.
				_, err = rt.LookupContainer(n + "1")
				if err != nil {
					infraSpec.Name = n + "1"
					break
				}
			} else {
				n = n[0:ind]
			}
			err = nil
			count := num
			for err == nil {
				count++
				tempN := n + strconv.Itoa(count)
				_, err = rt.LookupContainer(tempN)
			}
			n += strconv.Itoa(count)
			infraSpec.Name = n
		default:
			infraSpec.Name = n + "-clone"
		}

		err = specgenutil.FillOutSpecGen(infraSpec, infraOptions, []string{})
		if err != nil {
			return nil, err
		}

		out, err := CompleteSpec(context.Background(), rt, infraSpec)
		if err != nil {
			return nil, err
		}

		// Print warnings
		if len(out) > 0 {
			for _, w := range out {
				fmt.Println("Could not properly complete the spec as expected:")
				fmt.Fprintf(os.Stderr, "%s\n", w)
			}
		}

		spec.InfraContainerSpec = infraSpec
		matching, err := json.Marshal(infraSpec)
		if err != nil {
			return nil, err
		}

		// track name before unmarshal so we do not overwrite w/ infra
		name := spec.Name
		err = json.Unmarshal(matching, spec)
		if err != nil {
			return nil, err
		}

		spec.Name = name
	}

	// need to reset hostname, name etc of both pod and infra
	spec.Hostname = ""

	if len(spec.InfraContainerSpec.Image) > 0 {
		spec.InfraImage = spec.InfraContainerSpec.Image
	}
	return pod, nil
}