-
Notifications
You must be signed in to change notification settings - Fork 66
/
plugin_linux.go
141 lines (123 loc) · 4.12 KB
/
plugin_linux.go
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
package v2 // import "github.com/docker/docker/plugin/v2"
import (
"os"
"path/filepath"
"runtime"
"strings"
"github.com/docker/docker/api/types"
"github.com/docker/docker/oci"
"github.com/docker/docker/pkg/system"
specs "github.com/opencontainers/runtime-spec/specs-go"
"github.com/pkg/errors"
)
// InitSpec creates an OCI spec from the plugin's config.
func (p *Plugin) InitSpec(execRoot string) (*specs.Spec, error) {
s := oci.DefaultSpec()
s.Root = &specs.Root{
Path: p.Rootfs,
Readonly: false, // TODO: all plugins should be readonly? settable in config?
}
userMounts := make(map[string]struct{}, len(p.PluginObj.Settings.Mounts))
for _, m := range p.PluginObj.Settings.Mounts {
userMounts[m.Destination] = struct{}{}
}
execRoot = filepath.Join(execRoot, p.PluginObj.ID)
if err := os.MkdirAll(execRoot, 0700); err != nil {
return nil, errors.WithStack(err)
}
if p.PluginObj.Config.PropagatedMount != "" {
pRoot := filepath.Join(filepath.Dir(p.Rootfs), "propagated-mount")
s.Mounts = append(s.Mounts, specs.Mount{
Source: pRoot,
Destination: p.PluginObj.Config.PropagatedMount,
Type: "bind",
Options: []string{"rbind", "rw", "rshared"},
})
s.Linux.RootfsPropagation = "rshared"
}
mounts := append(p.PluginObj.Config.Mounts, types.PluginMount{
Source: &execRoot,
Destination: defaultPluginRuntimeDestination,
Type: "bind",
Options: []string{"rbind", "rshared"},
})
if p.PluginObj.Config.Network.Type != "" {
// TODO: if net == bridge, use libnetwork controller to create a new plugin-specific bridge, bind mount /etc/hosts and /etc/resolv.conf look at the docker code (allocateNetwork, initialize)
if p.PluginObj.Config.Network.Type == "host" {
oci.RemoveNamespace(&s, specs.LinuxNamespaceType("network"))
}
etcHosts := "/etc/hosts"
resolvConf := "/etc/resolv.conf"
mounts = append(mounts,
types.PluginMount{
Source: &etcHosts,
Destination: etcHosts,
Type: "bind",
Options: []string{"rbind", "ro"},
},
types.PluginMount{
Source: &resolvConf,
Destination: resolvConf,
Type: "bind",
Options: []string{"rbind", "ro"},
})
}
if p.PluginObj.Config.PidHost {
oci.RemoveNamespace(&s, specs.LinuxNamespaceType("pid"))
}
if p.PluginObj.Config.IpcHost {
oci.RemoveNamespace(&s, specs.LinuxNamespaceType("ipc"))
}
for _, mnt := range mounts {
m := specs.Mount{
Destination: mnt.Destination,
Type: mnt.Type,
Options: mnt.Options,
}
if mnt.Source == nil {
return nil, errors.New("mount source is not specified")
}
m.Source = *mnt.Source
s.Mounts = append(s.Mounts, m)
}
for i, m := range s.Mounts {
if strings.HasPrefix(m.Destination, "/dev/") {
if _, ok := userMounts[m.Destination]; ok {
s.Mounts = append(s.Mounts[:i], s.Mounts[i+1:]...)
}
}
}
if p.PluginObj.Config.Linux.AllowAllDevices {
s.Linux.Resources.Devices = []specs.LinuxDeviceCgroup{{Allow: true, Access: "rwm"}}
}
for _, dev := range p.PluginObj.Settings.Devices {
path := *dev.Path
d, dPermissions, err := oci.DevicesFromPath(path, path, "rwm")
if err != nil {
return nil, errors.WithStack(err)
}
s.Linux.Devices = append(s.Linux.Devices, d...)
s.Linux.Resources.Devices = append(s.Linux.Resources.Devices, dPermissions...)
}
envs := make([]string, 1, len(p.PluginObj.Settings.Env)+1)
envs[0] = "PATH=" + system.DefaultPathEnv(runtime.GOOS)
envs = append(envs, p.PluginObj.Settings.Env...)
args := append(p.PluginObj.Config.Entrypoint, p.PluginObj.Settings.Args...)
cwd := p.PluginObj.Config.WorkDir
if len(cwd) == 0 {
cwd = "/"
}
s.Process.Terminal = false
s.Process.Args = args
s.Process.Cwd = cwd
s.Process.Env = envs
caps := s.Process.Capabilities
caps.Bounding = append(caps.Bounding, p.PluginObj.Config.Linux.Capabilities...)
caps.Permitted = append(caps.Permitted, p.PluginObj.Config.Linux.Capabilities...)
caps.Inheritable = append(caps.Inheritable, p.PluginObj.Config.Linux.Capabilities...)
caps.Effective = append(caps.Effective, p.PluginObj.Config.Linux.Capabilities...)
if p.modifyRuntimeSpec != nil {
p.modifyRuntimeSpec(&s)
}
return &s, nil
}