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
|
// +build linux
package libpod
import (
"context"
"strings"
"github.com/containers/libpod/libpod/define"
"github.com/containers/libpod/libpod/image"
"github.com/containers/libpod/pkg/rootless"
"github.com/containers/libpod/pkg/util"
"github.com/opencontainers/image-spec/specs-go/v1"
spec "github.com/opencontainers/runtime-spec/specs-go"
"github.com/opencontainers/runtime-tools/generate"
"github.com/pkg/errors"
"github.com/sirupsen/logrus"
)
const (
// IDTruncLength is the length of the pod's id that will be used to make the
// infra container name
IDTruncLength = 12
)
func (r *Runtime) makeInfraContainer(ctx context.Context, p *Pod, imgName, imgID string, config *v1.ImageConfig) (*Container, error) {
// Set up generator for infra container defaults
g, err := generate.New("linux")
if err != nil {
return nil, err
}
// Set Pod hostname
g.Config.Hostname = p.config.Hostname
isRootless := rootless.IsRootless()
entryCmd := []string{r.config.InfraCommand}
var options []CtrCreateOption
// I've seen circumstances where config is being passed as nil.
// Let's err on the side of safety and make sure it's safe to use.
if config != nil {
setEntrypoint := false
// default to entrypoint in image if there is one
if len(config.Entrypoint) > 0 {
entryCmd = config.Entrypoint
setEntrypoint = true
}
if len(config.Cmd) > 0 {
// We can't use the default pause command, since we're
// sourcing from the image. If we didn't already set an
// entrypoint, set one now.
if !setEntrypoint {
// Use the Docker default "/bin/sh -c"
// entrypoint, as we're overriding command.
// If an image doesn't want this, it can
// override entrypoint too.
entryCmd = []string{"/bin/sh", "-c"}
}
entryCmd = append(entryCmd, config.Cmd...)
}
if len(config.Env) > 0 {
for _, nameValPair := range config.Env {
nameValSlice := strings.Split(nameValPair, "=")
if len(nameValSlice) < 2 {
return nil, errors.Errorf("Invalid environment variable structure in pause image")
}
g.AddProcessEnv(nameValSlice[0], nameValSlice[1])
}
}
// Since user namespace sharing is not implemented, we only need to check if it's rootless
if !p.config.InfraContainer.HostNetwork {
netmode := "bridge"
if isRootless {
netmode = "slirp4netns"
}
// PostConfigureNetNS should not be set since user namespace sharing is not implemented
// and rootless networking no longer supports post configuration setup
options = append(options, WithNetNS(p.config.InfraContainer.PortBindings, false, netmode, p.config.InfraContainer.Networks))
} else if err := g.RemoveLinuxNamespace(string(spec.NetworkNamespace)); err != nil {
return nil, errors.Wrapf(err, "error removing network namespace from pod %s infra container", p.ID())
}
if p.config.InfraContainer.StaticIP != nil {
options = append(options, WithStaticIP(p.config.InfraContainer.StaticIP))
}
if p.config.InfraContainer.StaticMAC != nil {
options = append(options, WithStaticMAC(p.config.InfraContainer.StaticMAC))
}
if p.config.InfraContainer.UseImageResolvConf {
options = append(options, WithUseImageResolvConf())
}
if len(p.config.InfraContainer.DNSServer) > 0 {
options = append(options, WithDNS(p.config.InfraContainer.DNSServer))
}
if len(p.config.InfraContainer.DNSSearch) > 0 {
options = append(options, WithDNSSearch(p.config.InfraContainer.DNSSearch))
}
if len(p.config.InfraContainer.DNSOption) > 0 {
options = append(options, WithDNSOption(p.config.InfraContainer.DNSOption))
}
if p.config.InfraContainer.UseImageHosts {
options = append(options, WithUseImageHosts())
}
if len(p.config.InfraContainer.HostAdd) > 0 {
options = append(options, WithHosts(p.config.InfraContainer.HostAdd))
}
}
g.SetRootReadonly(true)
g.SetProcessArgs(entryCmd)
logrus.Debugf("Using %q as infra container entrypoint", entryCmd)
if isRootless {
g.RemoveMount("/dev/pts")
devPts := spec.Mount{
Destination: "/dev/pts",
Type: "devpts",
Source: "devpts",
Options: []string{"private", "nosuid", "noexec", "newinstance", "ptmxmode=0666", "mode=0620"},
}
g.AddMount(devPts)
}
containerName := p.ID()[:IDTruncLength] + "-infra"
options = append(options, r.WithPod(p))
options = append(options, WithRootFSFromImage(imgID, imgName))
options = append(options, WithName(containerName))
options = append(options, withIsInfra())
return r.newContainer(ctx, g.Config, options...)
}
// createInfraContainer wrap creates an infra container for a pod.
// An infra container becomes the basis for kernel namespace sharing between
// containers in the pod.
func (r *Runtime) createInfraContainer(ctx context.Context, p *Pod) (*Container, error) {
if !r.valid {
return nil, define.ErrRuntimeStopped
}
newImage, err := r.ImageRuntime().New(ctx, r.config.InfraImage, "", "", nil, nil, image.SigningOptions{}, nil, util.PullImageMissing)
if err != nil {
return nil, err
}
data, err := newImage.Inspect(ctx)
if err != nil {
return nil, err
}
imageName := newImage.Names()[0]
imageID := data.ID
return r.makeInfraContainer(ctx, p, imageName, imageID, data.Config)
}
|
