aboutsummaryrefslogtreecommitdiff
path: root/pkg/specgen/specgen.go
blob: 0a9a16ea7581b26a4510331b2944292077de139a (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
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
package specgen

import (
	"errors"
	"net"
	"syscall"

	"github.com/containers/image/v5/manifest"
	"github.com/containers/storage"
	spec "github.com/opencontainers/runtime-spec/specs-go"
)

//  LogConfig describes the logging characteristics for a container
type LogConfig struct {
	// LogDriver is the container's log driver.
	// Optional.
	Driver string `json:"driver,omitempty"`
	// LogPath is the path the container's logs will be stored at.
	// Only available if LogDriver is set to "json-file" or "k8s-file".
	// Optional.
	Path string `json:"path,omitempty"`
	// Size is the maximimup size of the log file
	// Optional.
	Size int64 `json:"size,omitempty"`
	// A set of options to accompany the log driver.
	// Optional.
	Options map[string]string `json:"options,omitempty"`
}

// ContainerBasicConfig contains the basic parts of a container.
type ContainerBasicConfig struct {
	// Name is the name the container will be given.
	// If no name is provided, one will be randomly generated.
	// Optional.
	Name string `json:"name,omitempty"`
	// Pod is the ID of the pod the container will join.
	// Optional.
	Pod string `json:"pod,omitempty"`
	// Entrypoint is the container's entrypoint.
	// If not given and Image is specified, this will be populated by the
	// image's configuration.
	// Optional.
	Entrypoint []string `json:"entrypoint,omitempty"`
	// Command is the container's command.
	// If not given and Image is specified, this will be populated by the
	// image's configuration.
	// Optional.
	Command []string `json:"command,omitempty"`
	// EnvHost indicates that the host environment should be added to container
	// Optional.
	EnvHost bool `json:"env_host,omitempty"`
	// EnvHTTPProxy indicates that the http host proxy environment variables
	// should be added to container
	// Optional.
	HTTPProxy bool `json:"httpproxy,omitempty"`
	// Env is a set of environment variables that will be set in the
	// container.
	// Optional.
	Env map[string]string `json:"env,omitempty"`
	// Terminal is whether the container will create a PTY.
	// Optional.
	Terminal bool `json:"terminal,omitempty"`
	// Stdin is whether the container will keep its STDIN open.
	Stdin bool `json:"stdin,omitempty"`
	// Labels are key-value pairs that are used to add metadata to
	// containers.
	// Optional.
	Labels map[string]string `json:"labels,omitempty"`
	// Annotations are key-value options passed into the container runtime
	// that can be used to trigger special behavior.
	// Optional.
	Annotations map[string]string `json:"annotations,omitempty"`
	// StopSignal is the signal that will be used to stop the container.
	// Must be a non-zero integer below SIGRTMAX.
	// If not provided, the default, SIGTERM, will be used.
	// Will conflict with Systemd if Systemd is set to "true" or "always".
	// Optional.
	StopSignal *syscall.Signal `json:"stop_signal,omitempty"`
	// StopTimeout is a timeout between the container's stop signal being
	// sent and SIGKILL being sent.
	// If not provided, the default will be used.
	// If 0 is used, stop signal will not be sent, and SIGKILL will be sent
	// instead.
	// Optional.
	StopTimeout *uint `json:"stop_timeout,omitempty"`
	// LogConfiguration describes the logging for a container including
	// driver, path, and options.
	// Optional
	LogConfiguration *LogConfig `json:"log_configuration,omitempty"`
	// ConmonPidFile is a path at which a PID file for Conmon will be
	// placed.
	// If not given, a default location will be used.
	// Optional.
	ConmonPidFile string `json:"conmon_pid_file,omitempty"`
	// RawImageName is the user-specified and unprocessed input referring
	// to a local or a remote image.
	RawImageName string `json:"raw_image_name,omitempty"`
	// RestartPolicy is the container's restart policy - an action which
	// will be taken when the container exits.
	// If not given, the default policy, which does nothing, will be used.
	// Optional.
	RestartPolicy string `json:"restart_policy,omitempty"`
	// RestartRetries is the number of attempts that will be made to restart
	// the container.
	// Only available when RestartPolicy is set to "on-failure".
	// Optional.
	RestartRetries *uint `json:"restart_tries,omitempty"`
	// OCIRuntime is the name of the OCI runtime that will be used to create
	// the container.
	// If not specified, the default will be used.
	// Optional.
	OCIRuntime string `json:"oci_runtime,omitempty"`
	// Systemd is whether the container will be started in systemd mode.
	// Valid options are "true", "false", and "always".
	// "true" enables this mode only if the binary run in the container is
	// /sbin/init or systemd. "always" unconditionally enables systemd mode.
	// "false" unconditionally disables systemd mode.
	// If enabled, mounts and stop signal will be modified.
	// If set to "always" or set to "true" and conditionally triggered,
	// conflicts with StopSignal.
	// If not specified, "false" will be assumed.
	// Optional.
	Systemd string `json:"systemd,omitempty"`
	// Determine how to handle the NOTIFY_SOCKET - do we participate or pass it through
	// "container" - let the OCI runtime deal with it, advertise conmon's MAINPID
	// "conmon-only" - advertise conmon's MAINPID, send READY when started, don't pass to OCI
	// "ignore" - unset NOTIFY_SOCKET
	SdNotifyMode string `json:"sdnotifyMode,omitempty"`
	// Namespace is the libpod namespace the container will be placed in.
	// Optional.
	Namespace string `json:"namespace,omitempty"`
	// PidNS is the container's PID namespace.
	// It defaults to private.
	// Mandatory.
	PidNS Namespace `json:"pidns,omitempty"`
	// UtsNS is the container's UTS namespace.
	// It defaults to private.
	// Must be set to Private to set Hostname.
	// Mandatory.
	UtsNS Namespace `json:"utsns,omitempty"`
	// Hostname is the container's hostname. If not set, the hostname will
	// not be modified (if UtsNS is not private) or will be set to the
	// container ID (if UtsNS is private).
	// Conflicts with UtsNS if UtsNS is not set to private.
	// Optional.
	Hostname string `json:"hostname,omitempty"`
	// Sysctl sets kernel parameters for the container
	Sysctl map[string]string `json:"sysctl,omitempty"`
	// Remove indicates if the container should be removed once it has been started
	// and exits
	Remove bool `json:"remove,omitempty"`
	// ContainerCreateCommand is the command that was used to create this
	// container.
	// This will be shown in the output of Inspect() on the container, and
	// may also be used by some tools that wish to recreate the container
	// (e.g. `podman generate systemd --new`).
	// Optional.
	ContainerCreateCommand []string `json:"containerCreateCommand,omitempty"`
	// PreserveFDs is a number of additional file descriptors (in addition
	// to 0, 1, 2) that will be passed to the executed process. The total FDs
	// passed will be 3 + PreserveFDs.
	// set tags as `json:"-"` for not supported remote
	PreserveFDs uint `json:"-"`
	// Timezone is the timezone inside the container.
	// Local means it has the same timezone as the host machine
	Timezone string `json:"timezone,omitempty"`
}

// ContainerStorageConfig contains information on the storage configuration of a
// container.
type ContainerStorageConfig struct {
	// Image is the image the container will be based on. The image will be
	// used as the container's root filesystem, and its environment vars,
	// volumes, and other configuration will be applied to the container.
	// Conflicts with Rootfs.
	// At least one of Image or Rootfs must be specified.
	Image string `json:"image"`
	// Rootfs is the path to a directory that will be used as the
	// container's root filesystem. No modification will be made to the
	// directory, it will be directly mounted into the container as root.
	// Conflicts with Image.
	// At least one of Image or Rootfs must be specified.
	Rootfs string `json:"rootfs,omitempty"`
	// ImageVolumeMode indicates how image volumes will be created.
	// Supported modes are "ignore" (do not create), "tmpfs" (create as
	// tmpfs), and "anonymous" (create as anonymous volumes).
	// The default if unset is anonymous.
	// Optional.
	ImageVolumeMode string `json:"image_volume_mode,omitempty"`
	// VolumesFrom is a set of containers whose volumes will be added to
	// this container. The name or ID of the container must be provided, and
	// may optionally be followed by a : and then one or more
	// comma-separated options. Valid options are 'ro', 'rw', and 'z'.
	// Options will be used for all volumes sourced from the container.
	VolumesFrom []string `json:"volumes_from,omitempty"`
	// Init specifies that an init binary will be mounted into the
	// container, and will be used as PID1.
	Init bool `json:"init,omitempty"`
	// InitPath specifies the path to the init binary that will be added if
	// Init is specified above. If not specified, the default set in the
	// Libpod config will be used. Ignored if Init above is not set.
	// Optional.
	InitPath string `json:"init_path,omitempty"`
	// Mounts are mounts that will be added to the container.
	// These will supersede Image Volumes and VolumesFrom volumes where
	// there are conflicts.
	// Optional.
	Mounts []spec.Mount `json:"mounts,omitempty"`
	// Volumes are named volumes that will be added to the container.
	// These will supersede Image Volumes and VolumesFrom volumes where
	// there are conflicts.
	// Optional.
	Volumes []*NamedVolume `json:"volumes,omitempty"`
	// Overlay volumes are named volumes that will be added to the container.
	// Optional.
	OverlayVolumes []*OverlayVolume `json:"overlay_volumes,omitempty"`
	// Image volumes bind-mount a container-image mount into the container.
	// Optional.
	ImageVolumes []*ImageVolume `json:"image_volumes,omitempty"`
	// Devices are devices that will be added to the container.
	// Optional.
	Devices []spec.LinuxDevice `json:"devices,omitempty"`
	// IpcNS is the container's IPC namespace.
	// Default is private.
	// Conflicts with ShmSize if not set to private.
	// Mandatory.
	IpcNS Namespace `json:"ipcns,omitempty"`
	// ShmSize is the size of the tmpfs to mount in at /dev/shm, in bytes.
	// Conflicts with ShmSize if IpcNS is not private.
	// Optional.
	ShmSize *int64 `json:"shm_size,omitempty"`
	// WorkDir is the container's working directory.
	// If unset, the default, /, will be used.
	// Optional.
	WorkDir string `json:"work_dir,omitempty"`
	// RootfsPropagation is the rootfs propagation mode for the container.
	// If not set, the default of rslave will be used.
	// Optional.
	RootfsPropagation string `json:"rootfs_propagation,omitempty"`
}

// ContainerSecurityConfig is a container's security features, including
// SELinux, Apparmor, and Seccomp.
type ContainerSecurityConfig struct {
	// Privileged is whether the container is privileged.
	// Privileged does the following:
	// - Adds all devices on the system to the container.
	// - Adds all capabilities to the container.
	// - Disables Seccomp, SELinux, and Apparmor confinement.
	//   (Though SELinux can be manually re-enabled).
	// TODO: this conflicts with things.
	// TODO: this does more.
	Privileged bool `json:"privileged,omitempty"`
	// User is the user the container will be run as.
	// Can be given as a UID or a username; if a username, it will be
	// resolved within the container, using the container's /etc/passwd.
	// If unset, the container will be run as root.
	// Optional.
	User string `json:"user,omitempty"`
	// Groups are a list of supplemental groups the container's user will
	// be granted access to.
	// Optional.
	Groups []string `json:"groups,omitempty"`
	// CapAdd are capabilities which will be added to the container.
	// Conflicts with Privileged.
	// Optional.
	CapAdd []string `json:"cap_add,omitempty"`
	// CapDrop are capabilities which will be removed from the container.
	// Conflicts with Privileged.
	// Optional.
	CapDrop []string `json:"cap_drop,omitempty"`
	// SelinuxProcessLabel is the process label the container will use.
	// If SELinux is enabled and this is not specified, a label will be
	// automatically generated if not specified.
	// Optional.
	SelinuxOpts []string `json:"selinux_opts,omitempty"`
	// ApparmorProfile is the name of the Apparmor profile the container
	// will use.
	// Optional.
	ApparmorProfile string `json:"apparmor_profile,omitempty"`
	// SeccompPolicy determines which seccomp profile gets applied
	// the container. valid values: empty,default,image
	SeccompPolicy string `json:"seccomp_policy,omitempty"`
	// SeccompProfilePath is the path to a JSON file containing the
	// container's Seccomp profile.
	// If not specified, no Seccomp profile will be used.
	// Optional.
	SeccompProfilePath string `json:"seccomp_profile_path,omitempty"`
	// NoNewPrivileges is whether the container will set the no new
	// privileges flag on create, which disables gaining additional
	// privileges (e.g. via setuid) in the container.
	NoNewPrivileges bool `json:"no_new_privileges,omitempty"`
	// UserNS is the container's user namespace.
	// It defaults to host, indicating that no user namespace will be
	// created.
	// If set to private, IDMappings must be set.
	// Mandatory.
	UserNS Namespace `json:"userns,omitempty"`
	// IDMappings are UID and GID mappings that will be used by user
	// namespaces.
	// Required if UserNS is private.
	IDMappings *storage.IDMappingOptions `json:"idmappings,omitempty"`
	// ReadOnlyFilesystem indicates that everything will be mounted
	// as read-only
	ReadOnlyFilesystem bool `json:"read_only_filesystem,omittempty"`
	// Umask is the umask the init process of the container will be run with.
	Umask string `json:"umask,omitempty"`
	// ProcOpts are the options used for the proc mount.
	ProcOpts []string `json:"procfs_opts,omitempty"`
}

// ContainerCgroupConfig contains configuration information about a container's
// cgroups.
type ContainerCgroupConfig struct {
	// CgroupNS is the container's cgroup namespace.
	// It defaults to private.
	// Mandatory.
	CgroupNS Namespace `json:"cgroupns,omitempty"`
	// CgroupsMode sets a policy for how cgroups will be created in the
	// container, including the ability to disable creation entirely.
	CgroupsMode string `json:"cgroups_mode,omitempty"`
	// CgroupParent is the container's CGroup parent.
	// If not set, the default for the current cgroup driver will be used.
	// Optional.
	CgroupParent string `json:"cgroup_parent,omitempty"`
}

// ContainerNetworkConfig contains information on a container's network
// configuration.
type ContainerNetworkConfig struct {
	// Aliases are a list of network-scoped aliases for container
	// Optional
	Aliases map[string][]string `json:"aliases"`
	// NetNS is the configuration to use for the container's network
	// namespace.
	// Mandatory.
	NetNS Namespace `json:"netns,omitempty"`
	// StaticIP is the a IPv4 address of the container.
	// Only available if NetNS is set to Bridge.
	// Optional.
	StaticIP *net.IP `json:"static_ip,omitempty"`
	// StaticIPv6 is a static IPv6 address to set in the container.
	// Only available if NetNS is set to Bridge.
	// Optional.
	StaticIPv6 *net.IP `json:"static_ipv6,omitempty"`
	// StaticMAC is a static MAC address to set in the container.
	// Only available if NetNS is set to bridge.
	// Optional.
	StaticMAC *net.HardwareAddr `json:"static_mac,omitempty"`
	// PortBindings is a set of ports to map into the container.
	// Only available if NetNS is set to bridge or slirp.
	// Optional.
	PortMappings []PortMapping `json:"portmappings,omitempty"`
	// PublishExposedPorts will publish ports specified in the image to
	// random unused ports (guaranteed to be above 1024) on the host.
	// This is based on ports set in Expose below, and any ports specified
	// by the Image (if one is given).
	// Only available if NetNS is set to Bridge or Slirp.
	PublishExposedPorts bool `json:"publish_image_ports,omitempty"`
	// Expose is a number of ports that will be forwarded to the container
	// if PublishExposedPorts is set.
	// Expose is a map of uint16 (port number) to a string representing
	// protocol. Allowed protocols are "tcp", "udp", and "sctp", or some
	// combination of the three separated by commas.
	// If protocol is set to "" we will assume TCP.
	// Only available if NetNS is set to Bridge or Slirp, and
	// PublishExposedPorts is set.
	// Optional.
	Expose map[uint16]string `json:"expose,omitempty"`
	// CNINetworks is a list of CNI networks to join the container to.
	// If this list is empty, the default CNI network will be joined
	// instead. If at least one entry is present, we will not join the
	// default network (unless it is part of this list).
	// Only available if NetNS is set to bridge.
	// Optional.
	CNINetworks []string `json:"cni_networks,omitempty"`
	// UseImageResolvConf indicates that resolv.conf should not be managed
	// by Podman, but instead sourced from the image.
	// Conflicts with DNSServer, DNSSearch, DNSOption.
	UseImageResolvConf bool `json:"use_image_resolve_conf,omitempty"`
	// DNSServers is a set of DNS servers that will be used in the
	// container's resolv.conf, replacing the host's DNS Servers which are
	// used by default.
	// Conflicts with UseImageResolvConf.
	// Optional.
	DNSServers []net.IP `json:"dns_server,omitempty"`
	// DNSSearch is a set of DNS search domains that will be used in the
	// container's resolv.conf, replacing the host's DNS search domains
	// which are used by default.
	// Conflicts with UseImageResolvConf.
	// Optional.
	DNSSearch []string `json:"dns_search,omitempty"`
	// DNSOptions is a set of DNS options that will be used in the
	// container's resolv.conf, replacing the host's DNS options which are
	// used by default.
	// Conflicts with UseImageResolvConf.
	// Optional.
	DNSOptions []string `json:"dns_option,omitempty"`
	// UseImageHosts indicates that /etc/hosts should not be managed by
	// Podman, and instead sourced from the image.
	// Conflicts with HostAdd.
	UseImageHosts bool `json:"use_image_hosts,omitempty"`
	// HostAdd is a set of hosts which will be added to the container's
	// /etc/hosts file.
	// Conflicts with UseImageHosts.
	// Optional.
	HostAdd []string `json:"hostadd,omitempty"`
	// NetworkOptions are additional options for each network
	// Optional.
	NetworkOptions map[string][]string `json:"network_options,omitempty"`
}

// ContainerResourceConfig contains information on container resource limits.
type ContainerResourceConfig struct {
	// ResourceLimits are resource limits to apply to the container.,
	// Can only be set as root on cgroups v1 systems, but can be set as
	// rootless as well for cgroups v2.
	// Optional.
	ResourceLimits *spec.LinuxResources `json:"resource_limits,omitempty"`
	// Rlimits are POSIX rlimits to apply to the container.
	// Optional.
	Rlimits []spec.POSIXRlimit `json:"r_limits,omitempty"`
	// OOMScoreAdj adjusts the score used by the OOM killer to determine
	// processes to kill for the container's process.
	// Optional.
	OOMScoreAdj *int `json:"oom_score_adj,omitempty"`
	// Weight per cgroup per device, can override BlkioWeight
	WeightDevice map[string]spec.LinuxWeightDevice `json:"weightDevice,omitempty"`
	// IO read rate limit per cgroup per device, bytes per second
	ThrottleReadBpsDevice map[string]spec.LinuxThrottleDevice `json:"throttleReadBpsDevice,omitempty"`
	// IO write rate limit per cgroup per device, bytes per second
	ThrottleWriteBpsDevice map[string]spec.LinuxThrottleDevice `json:"throttleWriteBpsDevice,omitempty"`
	// IO read rate limit per cgroup per device, IO per second
	ThrottleReadIOPSDevice map[string]spec.LinuxThrottleDevice `json:"throttleReadIOPSDevice,omitempty"`
	// IO write rate limit per cgroup per device, IO per second
	ThrottleWriteIOPSDevice map[string]spec.LinuxThrottleDevice `json:"throttleWriteIOPSDevice,omitempty"`
	// CgroupConf are key-value options passed into the container runtime
	// that are used to configure cgroup v2.
	// Optional.
	CgroupConf map[string]string `json:"unified,omitempty"`
}

// ContainerHealthCheckConfig describes a container healthcheck with attributes
// like command, retries, interval, start period, and timeout.
type ContainerHealthCheckConfig struct {
	HealthConfig *manifest.Schema2HealthConfig `json:"healthconfig,omitempty"`
}

// SpecGenerator creates an OCI spec and Libpod configuration options to create
// a container based on the given configuration.
// swagger:model SpecGenerator
type SpecGenerator struct {
	ContainerBasicConfig
	ContainerStorageConfig
	ContainerSecurityConfig
	ContainerCgroupConfig
	ContainerNetworkConfig
	ContainerResourceConfig
	ContainerHealthCheckConfig
}

// NamedVolume holds information about a named volume that will be mounted into
// the container.
type NamedVolume struct {
	// Name is the name of the named volume to be mounted. May be empty.
	// If empty, a new named volume with a pseudorandomly generated name
	// will be mounted at the given destination.
	Name string
	// Destination to mount the named volume within the container. Must be
	// an absolute path. Path will be created if it does not exist.
	Dest string
	// Options are options that the named volume will be mounted with.
	Options []string
}

// OverlayVolume holds information about a overlay volume that will be mounted into
// the container.
type OverlayVolume struct {
	// Destination is the absolute path where the mount will be placed in the container.
	Destination string `json:"destination"`
	// Source specifies the source path of the mount.
	Source string `json:"source,omitempty"`
}

// ImageVolume is a volume based on a container image.  The container image is
// first mounted on the host and is then bind-mounted into the container.  An
// ImageVolume is always mounted read only.
type ImageVolume struct {
	// Source is the source of the image volume.  The image can be referred
	// to by name and by ID.
	Source string
	// Destination is the absolute path of the mount in the container.
	Destination string
	// ReadWrite sets the volume writable.
	ReadWrite bool
}

// PortMapping is one or more ports that will be mapped into the container.
type PortMapping struct {
	// HostIP is the IP that we will bind to on the host.
	// If unset, assumed to be 0.0.0.0 (all interfaces).
	HostIP string `json:"host_ip,omitempty"`
	// ContainerPort is the port number that will be exposed from the
	// container.
	// Mandatory.
	ContainerPort uint16 `json:"container_port"`
	// HostPort is the port number that will be forwarded from the host into
	// the container.
	// If omitted, a random port on the host (guaranteed to be over 1024)
	// will be assigned.
	HostPort uint16 `json:"host_port,omitempty"`
	// Range is the number of ports that will be forwarded, starting at
	// HostPort and ContainerPort and counting up.
	// This is 1-indexed, so 1 is assumed to be a single port (only the
	// Hostport:Containerport mapping will be added), 2 is two ports (both
	// Hostport:Containerport and Hostport+1:Containerport+1), etc.
	// If unset, assumed to be 1 (a single port).
	// Both hostport + range and containerport + range must be less than
	// 65536.
	Range uint16 `json:"range,omitempty"`
	// Protocol is the protocol forward.
	// Must be either "tcp", "udp", and "sctp", or some combination of these
	// separated by commas.
	// If unset, assumed to be TCP.
	Protocol string `json:"protocol,omitempty"`
}

var (
	// ErrNoStaticIPRootless is used when a rootless user requests to assign a static IP address
	// to a pod or container
	ErrNoStaticIPRootless error = errors.New("rootless containers and pods cannot be assigned static IP addresses")
	// ErrNoStaticMACRootless is used when a rootless user requests to assign a static MAC address
	// to a pod or container
	ErrNoStaticMACRootless error = errors.New("rootless containers and pods cannot be assigned static MAC addresses")
)

// NewSpecGenerator returns a SpecGenerator struct given one of two mandatory inputs
func NewSpecGenerator(arg string, rootfs bool) *SpecGenerator {
	csc := ContainerStorageConfig{}
	if rootfs {
		csc.Rootfs = arg
	} else {
		csc.Image = arg
	}
	return &SpecGenerator{
		ContainerStorageConfig: csc,
	}
}

// NewSpecGenerator returns a SpecGenerator struct given one of two mandatory inputs
func NewSpecGeneratorWithRootfs(rootfs string) *SpecGenerator {
	csc := ContainerStorageConfig{Rootfs: rootfs}
	return &SpecGenerator{ContainerStorageConfig: csc}
}