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|
package native
import (
"fmt"
"os"
"os/exec"
"path/filepath"
"github.com/docker/libcontainer"
"github.com/docker/libcontainer/apparmor"
"github.com/docker/libcontainer/devices"
"github.com/docker/libcontainer/mount"
"github.com/docker/libcontainer/security/capabilities"
"github.com/dotcloud/docker/daemon/execdriver"
"github.com/dotcloud/docker/daemon/execdriver/native/configuration"
"github.com/dotcloud/docker/daemon/execdriver/native/template"
)
// createContainer populates and configures the container type with the
// data provided by the execdriver.Command
func (d *driver) createContainer(c *execdriver.Command) (*libcontainer.Config, error) {
container := template.New()
container.Hostname = getEnv("HOSTNAME", c.Env)
container.Tty = c.Tty
container.User = c.User
container.WorkingDir = c.WorkingDir
container.Env = c.Env
container.Cgroups.Name = c.ID
container.Cgroups.AllowedDevices = c.AllowedDevices
container.MountConfig.DeviceNodes = c.AutoCreatedDevices
// check to see if we are running in ramdisk to disable pivot root
container.MountConfig.NoPivotRoot = os.Getenv("DOCKER_RAMDISK") != ""
container.RestrictSys = true
if err := d.createNetwork(container, c); err != nil {
return nil, err
}
if c.Privileged {
if err := d.setPrivileged(container); err != nil {
return nil, err
}
}
if err := d.setupCgroups(container, c); err != nil {
return nil, err
}
if err := d.setupMounts(container, c); err != nil {
return nil, err
}
if err := d.setupLabels(container, c); err != nil {
return nil, err
}
cmds := make(map[string]*exec.Cmd)
d.Lock()
for k, v := range d.activeContainers {
cmds[k] = v.cmd
}
d.Unlock()
if err := configuration.ParseConfiguration(container, cmds, c.Config["native"]); err != nil {
return nil, err
}
return container, nil
}
func (d *driver) createNetwork(container *libcontainer.Config, c *execdriver.Command) error {
if c.Network.HostNetworking {
container.Namespaces["NEWNET"] = false
return nil
}
container.Networks = []*libcontainer.Network{
{
Mtu: c.Network.Mtu,
Address: fmt.Sprintf("%s/%d", "127.0.0.1", 0),
Gateway: "localhost",
Type: "loopback",
},
}
if c.Network.Interface != nil {
vethNetwork := libcontainer.Network{
Mtu: c.Network.Mtu,
Address: fmt.Sprintf("%s/%d", c.Network.Interface.IPAddress, c.Network.Interface.IPPrefixLen),
Gateway: c.Network.Interface.Gateway,
Type: "veth",
Bridge: c.Network.Interface.Bridge,
VethPrefix: "veth",
}
container.Networks = append(container.Networks, &vethNetwork)
}
if c.Network.ContainerID != "" {
d.Lock()
active := d.activeContainers[c.Network.ContainerID]
d.Unlock()
if active == nil || active.cmd.Process == nil {
return fmt.Errorf("%s is not a valid running container to join", c.Network.ContainerID)
}
cmd := active.cmd
nspath := filepath.Join("/proc", fmt.Sprint(cmd.Process.Pid), "ns", "net")
container.Networks = append(container.Networks, &libcontainer.Network{
Type: "netns",
NsPath: nspath,
})
}
return nil
}
func (d *driver) setPrivileged(container *libcontainer.Config) (err error) {
container.Capabilities = capabilities.GetAllCapabilities()
container.Cgroups.AllowAllDevices = true
hostDeviceNodes, err := devices.GetHostDeviceNodes()
if err != nil {
return err
}
container.MountConfig.DeviceNodes = hostDeviceNodes
container.RestrictSys = false
if apparmor.IsEnabled() {
container.AppArmorProfile = "unconfined"
}
return nil
}
func (d *driver) setupCgroups(container *libcontainer.Config, c *execdriver.Command) error {
if c.Resources != nil {
container.Cgroups.CpuShares = c.Resources.CpuShares
container.Cgroups.Memory = c.Resources.Memory
container.Cgroups.MemoryReservation = c.Resources.Memory
container.Cgroups.MemorySwap = c.Resources.MemorySwap
container.Cgroups.CpusetCpus = c.Resources.Cpuset
}
return nil
}
func (d *driver) setupMounts(container *libcontainer.Config, c *execdriver.Command) error {
for _, m := range c.Mounts {
container.MountConfig.Mounts = append(container.MountConfig.Mounts, mount.Mount{
Type: "bind",
Source: m.Source,
Destination: m.Destination,
Writable: m.Writable,
Private: m.Private,
})
}
return nil
}
func (d *driver) setupLabels(container *libcontainer.Config, c *execdriver.Command) error {
container.ProcessLabel = c.Config["process_label"][0]
container.MountConfig.MountLabel = c.Config["mount_label"][0]
return nil
}
|
