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Add specific types for Required and Optional DeviceNodes
Docker-DCO-1.1-Signed-off-by: Michael Crosby <michael@crosbymichael.com> (github: crosbymichael)
This commit is contained in:
Michael Crosby 2014-05-21 00:36:50 +00:00
parent 7fb3f86fec
commit 3d95e5cf7b
4 changed files with 20 additions and 23 deletions
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17
libcontainer/container.go
View file

@ -43,7 +43,7 @@ type Container struct {
// All capbilities not specified will be dropped from the processes capability mask
Capabilities []string `json:"capabilities,omitempty"`
// Networks specifies the container's network stop to be created
// Networks specifies the container's network setup to be created
Networks []*Network `json:"networks,omitempty"`
// Cgroups specifies specific cgroup settings for the various subsystems that the container is
@ -60,14 +60,13 @@ type Container struct {
// rootfs and mount namespace if specified
Mounts Mounts `json:"mounts,omitempty"`
// DeviceNodes are a list of 'required' and 'additional' nodes that will be mknod into the container's
// rootfs at /dev
//
// Required device nodes will return an error if the host system does not have this device available
//
// Additional device nodes are created but no error is returned if the host system does not have the
// device avaliable for use by the container
DeviceNodes map[string][]string `json:"device_nodes,omitempty"`
// RequiredDeviceNodes are a list of device nodes that will be mknod into the container's rootfs at /dev
// If the host system does not support the device that the container requests an error is returned
RequiredDeviceNodes []string `json:"required_device_nodes,omitempty"`
// OptionalDeviceNodes are a list of device nodes that will be mknod into the container's rootfs at /dev
// If the host system does not support the device that the container requests the error is ignored
OptionalDeviceNodes []string `json:"optional_device_nodes,omitempty"`
}
// Network defines configuration for a container's networking stack

18
libcontainer/container.json
View file

@ -44,14 +44,12 @@
"type": "devtmpfs"
}
],
"device_nodes": {
"required": [
"null",
"zero",
"full",
"random",
"urandom",
"tty"
]
}
"required_device_nodes": [
"null",
"zero",
"full",
"random",
"urandom",
"tty"
]
}

2
libcontainer/container_test.go
View file

@ -65,7 +65,7 @@ func TestContainerJsonFormat(t *testing.T) {
}
for _, n := range nodes.DefaultNodes {
if !contains(n, container.DeviceNodes["required"]) {
if !contains(n, container.RequiredDeviceNodes) {
t.Logf("devices should contain %s", n)
t.Fail()
}

6
libcontainer/mount/init.go
View file

@ -48,11 +48,11 @@ func InitializeMountNamespace(rootfs, console string, container *libcontainer.Co
if err := setupBindmounts(rootfs, container.Mounts); err != nil {
return fmt.Errorf("bind mounts %s", err)
}
if err := nodes.CopyN(rootfs, container.DeviceNodes["required"], true); err != nil {
if err := nodes.CopyN(rootfs, container.RequiredDeviceNodes, true); err != nil {
return fmt.Errorf("copy required dev nodes %s", err)
}
if err := nodes.CopyN(rootfs, container.DeviceNodes["additional"], false); err != nil {
return fmt.Errorf("copy additional dev nodes %s", err)
if err := nodes.CopyN(rootfs, container.OptionalDeviceNodes, false); err != nil {
return fmt.Errorf("copy optional dev nodes %s", err)
}
if err := SetupPtmx(rootfs, console, container.Context["mount_label"]); err != nil {
return err