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
|
package specgen
import (
"strings"
"github.com/containers/libpod/v2/pkg/rootless"
"github.com/containers/libpod/v2/pkg/util"
"github.com/pkg/errors"
)
var (
// ErrInvalidSpecConfig describes an error that the given SpecGenerator is invalid
ErrInvalidSpecConfig = errors.New("invalid configuration")
// SystemDValues describes the only values that SystemD can be
SystemDValues = []string{"true", "false", "always"}
// ImageVolumeModeValues describes the only values that ImageVolumeMode can be
ImageVolumeModeValues = []string{"ignore", "tmpfs", "anonymous"}
)
func exclusiveOptions(opt1, opt2 string) error {
return errors.Errorf("%s and %s are mutually exclusive options", opt1, opt2)
}
// Validate verifies that the given SpecGenerator is valid and satisfies required
// input for creating a container.
func (s *SpecGenerator) Validate() error {
//
// ContainerBasicConfig
//
// Rootfs and Image cannot both populated
if len(s.ContainerStorageConfig.Image) > 0 && len(s.ContainerStorageConfig.Rootfs) > 0 {
return errors.Wrap(ErrInvalidSpecConfig, "both image and rootfs cannot be simultaneously")
}
// Cannot set hostname and utsns
if len(s.ContainerBasicConfig.Hostname) > 0 && !s.ContainerBasicConfig.UtsNS.IsPrivate() {
return errors.Wrap(ErrInvalidSpecConfig, "cannot set hostname when running in the host UTS namespace")
}
// systemd values must be true, false, or always
if len(s.ContainerBasicConfig.Systemd) > 0 && !util.StringInSlice(strings.ToLower(s.ContainerBasicConfig.Systemd), SystemDValues) {
return errors.Wrapf(ErrInvalidSpecConfig, "--systemd values must be one of %q", strings.Join(SystemDValues, ", "))
}
//
// ContainerStorageConfig
//
// rootfs and image cannot both be set
if len(s.ContainerStorageConfig.Image) > 0 && len(s.ContainerStorageConfig.Rootfs) > 0 {
return exclusiveOptions("rootfs", "image")
}
// imagevolumemode must be one of ignore, tmpfs, or anonymous if given
if len(s.ContainerStorageConfig.ImageVolumeMode) > 0 && !util.StringInSlice(strings.ToLower(s.ContainerStorageConfig.ImageVolumeMode), ImageVolumeModeValues) {
return errors.Errorf("invalid ImageVolumeMode %q, value must be one of %s",
s.ContainerStorageConfig.ImageVolumeMode, strings.Join(ImageVolumeModeValues, ","))
}
// shmsize conflicts with IPC namespace
if s.ContainerStorageConfig.ShmSize != nil && !s.ContainerStorageConfig.IpcNS.IsPrivate() {
return errors.New("cannot set shmsize when running in the host IPC Namespace")
}
//
// ContainerSecurityConfig
//
// capadd and privileged are exclusive
if len(s.CapAdd) > 0 && s.Privileged {
return exclusiveOptions("CapAdd", "privileged")
}
// apparmor and privileged are exclusive
if len(s.ApparmorProfile) > 0 && s.Privileged {
return exclusiveOptions("AppArmorProfile", "privileged")
}
// userns and idmappings conflict
if s.UserNS.IsPrivate() && s.IDMappings == nil {
return errors.Wrap(ErrInvalidSpecConfig, "IDMappings are required when not creating a User namespace")
}
//
// ContainerCgroupConfig
//
//
// None for now
//
// ContainerNetworkConfig
//
// useimageresolveconf conflicts with dnsserver, dnssearch, dnsoption
if s.UseImageResolvConf {
if len(s.DNSServers) > 0 {
return exclusiveOptions("UseImageResolvConf", "DNSServer")
}
if len(s.DNSSearch) > 0 {
return exclusiveOptions("UseImageResolvConf", "DNSSearch")
}
if len(s.DNSOptions) > 0 {
return exclusiveOptions("UseImageResolvConf", "DNSOption")
}
}
// UseImageHosts and HostAdd are exclusive
if s.UseImageHosts && len(s.HostAdd) > 0 {
return exclusiveOptions("UseImageHosts", "HostAdd")
}
// TODO the specgen does not appear to handle this? Should it
//switch config.Cgroup.Cgroups {
//case "disabled":
// if addedResources {
// return errors.New("cannot specify resource limits when cgroups are disabled is specified")
// }
// configSpec.Linux.Resources = &spec.LinuxResources{}
//case "enabled", "no-conmon", "":
// // Do nothing
//default:
// return errors.New("unrecognized option for cgroups; supported are 'default', 'disabled', 'no-conmon'")
//}
// Namespaces
if err := s.UtsNS.validate(); err != nil {
return err
}
if err := s.IpcNS.validate(); err != nil {
return err
}
if err := s.PidNS.validate(); err != nil {
return err
}
if err := s.CgroupNS.validate(); err != nil {
return err
}
if err := validateUserNS(&s.UserNS); err != nil {
return err
}
// The following are defaults as needed by container creation
if len(s.WorkDir) < 1 {
s.WorkDir = "/"
}
// Set defaults if network info is not provided
if s.NetNS.NSMode == "" {
s.NetNS.NSMode = Bridge
if rootless.IsRootless() {
s.NetNS.NSMode = Slirp
}
}
if err := validateNetNS(&s.NetNS); err != nil {
return err
}
return nil
}
|
