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Merge pull request #4833 from crosbymichael/pluginflag

Browse source 
Add opts flag for fine grained control over drivers
This commit is contained in:
Guillaume J. Charmes 2014-04-01 13:34:08 -07:00
commit b4b87413d8
24 changed files with 724 additions and 261 deletions
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23
pkg/cgroups/apply_raw.go
View file

@ -49,6 +49,9 @@ func rawApply(c *Cgroup, pid int) (ActiveCgroup, error) {
if err := raw.setupCpu(c, pid); err != nil {
return nil, err
}
if err := raw.setupCpuset(c, pid); err != nil {
return nil, err
}
return raw, nil
}
@ -170,6 +173,25 @@ func (raw *rawCgroup) setupCpu(c *Cgroup, pid int) (err error) {
return nil
}
func (raw *rawCgroup) setupCpuset(c *Cgroup, pid int) (err error) {
if c.CpusetCpus != "" {
dir, err := raw.join("cpuset", pid)
if err != nil {
return err
}
defer func() {
if err != nil {
os.RemoveAll(dir)
}
}()
if err := writeFile(dir, "cpuset.cpus", c.CpusetCpus); err != nil {
return err
}
}
return nil
}
func (raw *rawCgroup) Cleanup() error {
get := func(subsystem string) string {
path, _ := raw.path(subsystem)
@ -180,6 +202,7 @@ func (raw *rawCgroup) Cleanup() error {
get("memory"),
get("devices"),
get("cpu"),
get("cpuset"),
} {
if path != "" {
os.RemoveAll(path)

9
pkg/cgroups/cgroups.go
View file

@ -15,10 +15,11 @@ type Cgroup struct {
Name string `json:"name,omitempty"`
Parent string `json:"parent,omitempty"`
DeviceAccess bool `json:"device_access,omitempty"` // name of parent cgroup or slice
Memory int64 `json:"memory,omitempty"` // Memory limit (in bytes)
MemorySwap int64 `json:"memory_swap,omitempty"` // Total memory usage (memory + swap); set `-1' to disable swap
CpuShares int64 `json:"cpu_shares,omitempty"` // CPU shares (relative weight vs. other containers)
DeviceAccess bool `json:"device_access,omitempty"` // name of parent cgroup or slice
Memory int64 `json:"memory,omitempty"` // Memory limit (in bytes)
MemorySwap int64 `json:"memory_swap,omitempty"` // Total memory usage (memory + swap); set `-1' to disable swap
CpuShares int64 `json:"cpu_shares,omitempty"` // CPU shares (relative weight vs. other containers)
CpusetCpus string `json:"cpuset_cpus,omitempty"` // CPU to use
UnitProperties [][2]string `json:"unit_properties,omitempty"` // systemd unit properties
}

4
pkg/libcontainer/capabilities/capabilities.go
View file

@ -27,7 +27,9 @@ func DropCapabilities(container *libcontainer.Container) error {
func getCapabilitiesMask(container *libcontainer.Container) []capability.Cap {
drop := []capability.Cap{}
for _, c := range container.CapabilitiesMask {
drop = append(drop, c.Value)
if !c.Enabled {
drop = append(drop, c.Value)
}
}
return drop
}

34
pkg/libcontainer/network/netns.go Normal file
View file

@ -0,0 +1,34 @@
package network
import (
"fmt"
"os"
"syscall"
"github.com/dotcloud/docker/pkg/libcontainer"
"github.com/dotcloud/docker/pkg/system"
)
// crosbymichael: could make a network strategy that instead of returning veth pair names it returns a pid to an existing network namespace
type NetNS struct {
}
func (v *NetNS) Create(n *libcontainer.Network, nspid int, context libcontainer.Context) error {
context["nspath"] = n.Context["nspath"]
return nil
}
func (v *NetNS) Initialize(config *libcontainer.Network, context libcontainer.Context) error {
nspath, exists := context["nspath"]
if !exists {
return fmt.Errorf("nspath does not exist in network context")
}
f, err := os.OpenFile(nspath, os.O_RDONLY, 0)
if err != nil {
return fmt.Errorf("failed get network namespace fd: %v", err)
}
if err := system.Setns(f.Fd(), syscall.CLONE_NEWNET); err != nil {
return fmt.Errorf("failed to setns current network namespace: %v", err)
}
return nil
}

2
pkg/libcontainer/network/strategy.go
View file

@ -2,6 +2,7 @@ package network
import (
"errors"
"github.com/dotcloud/docker/pkg/libcontainer"
)
@ -12,6 +13,7 @@ var (
var strategies = map[string]NetworkStrategy{
"veth": &Veth{},
"loopback": &Loopback{},
"netns": &NetNS{},
}
// NetworkStrategy represents a specific network configuration for

4
pkg/libcontainer/nsinit/command.go
View file

@ -39,7 +39,9 @@ func (c *DefaultCommandFactory) Create(container *libcontainer.Container, consol
// flags on clone, unshare, and setns
func GetNamespaceFlags(namespaces libcontainer.Namespaces) (flag int) {
for _, ns := range namespaces {
flag |= ns.Value
if ns.Enabled {
flag |= ns.Value
}
}
return flag
}

7
pkg/libcontainer/nsinit/exec.go
View file

@ -3,13 +3,14 @@
package nsinit
import (
"os"
"os/exec"
"syscall"
"github.com/dotcloud/docker/pkg/cgroups"
"github.com/dotcloud/docker/pkg/libcontainer"
"github.com/dotcloud/docker/pkg/libcontainer/network"
"github.com/dotcloud/docker/pkg/system"
"os"
"os/exec"
"syscall"
)
// Exec performes setup outside of a namespace so that a container can be

13
pkg/libcontainer/nsinit/init.go
View file

@ -4,6 +4,10 @@ package nsinit
import (
"fmt"
"os"
"runtime"
"syscall"
"github.com/dotcloud/docker/pkg/label"
"github.com/dotcloud/docker/pkg/libcontainer"
"github.com/dotcloud/docker/pkg/libcontainer/apparmor"
@ -12,9 +16,6 @@ import (
"github.com/dotcloud/docker/pkg/libcontainer/utils"
"github.com/dotcloud/docker/pkg/system"
"github.com/dotcloud/docker/pkg/user"
"os"
"runtime"
"syscall"
)
// Init is the init process that first runs inside a new namespace to setup mounts, users, networking,
@ -58,13 +59,13 @@ func (ns *linuxNs) Init(container *libcontainer.Container, uncleanRootfs, consol
if err := system.ParentDeathSignal(uintptr(syscall.SIGTERM)); err != nil {
return fmt.Errorf("parent death signal %s", err)
}
if err := setupNetwork(container, context); err != nil {
return fmt.Errorf("setup networking %s", err)
}
ns.logger.Println("setup mount namespace")
if err := setupNewMountNamespace(rootfs, container.Mounts, console, container.ReadonlyFs, container.NoPivotRoot, container.Context["mount_label"]); err != nil {
return fmt.Errorf("setup mount namespace %s", err)
}
if err := setupNetwork(container, context); err != nil {
return fmt.Errorf("setup networking %s", err)
}
if err := system.Sethostname(container.Hostname); err != nil {
return fmt.Errorf("sethostname %s", err)
}

11
pkg/libcontainer/nsinit/mount.go
View file

@ -32,11 +32,6 @@ func setupNewMountNamespace(rootfs string, bindMounts []libcontainer.Mount, cons
if err := system.Mount(rootfs, rootfs, "bind", syscall.MS_BIND|syscall.MS_REC, ""); err != nil {
return fmt.Errorf("mouting %s as bind %s", rootfs, err)
}
if readonly {
if err := system.Mount(rootfs, rootfs, "bind", syscall.MS_BIND|syscall.MS_REMOUNT|syscall.MS_RDONLY|syscall.MS_REC, ""); err != nil {
return fmt.Errorf("mounting %s as readonly %s", rootfs, err)
}
}
if err := mountSystem(rootfs, mountLabel); err != nil {
return fmt.Errorf("mount system %s", err)
}
@ -82,6 +77,12 @@ func setupNewMountNamespace(rootfs string, bindMounts []libcontainer.Mount, cons
}
}
if readonly {
if err := system.Mount("/", "/", "bind", syscall.MS_BIND|syscall.MS_REMOUNT|syscall.MS_RDONLY|syscall.MS_REC, ""); err != nil {
return fmt.Errorf("mounting %s as readonly %s", rootfs, err)
}
}
system.Umask(0022)
return nil

5
pkg/libcontainer/nsinit/nsinit/main.go
View file

@ -3,14 +3,15 @@ package main
import (
"encoding/json"
"flag"
"github.com/dotcloud/docker/pkg/libcontainer"
"github.com/dotcloud/docker/pkg/libcontainer/nsinit"
"io"
"io/ioutil"
"log"
"os"
"path/filepath"
"strconv"
"github.com/dotcloud/docker/pkg/libcontainer"
"github.com/dotcloud/docker/pkg/libcontainer/nsinit"
)
var (

99
pkg/libcontainer/types.go
View file

@ -1,7 +1,6 @@
package libcontainer
import (
"encoding/json"
"errors"
"github.com/syndtr/gocapability/capability"
)
@ -19,29 +18,30 @@ var (
namespaceList = Namespaces{}
capabilityList = Capabilities{
{Key: "SETPCAP", Value: capability.CAP_SETPCAP},
{Key: "SYS_MODULE", Value: capability.CAP_SYS_MODULE},
{Key: "SYS_RAWIO", Value: capability.CAP_SYS_RAWIO},
{Key: "SYS_PACCT", Value: capability.CAP_SYS_PACCT},
{Key: "SYS_ADMIN", Value: capability.CAP_SYS_ADMIN},
{Key: "SYS_NICE", Value: capability.CAP_SYS_NICE},
{Key: "SYS_RESOURCE", Value: capability.CAP_SYS_RESOURCE},
{Key: "SYS_TIME", Value: capability.CAP_SYS_TIME},
{Key: "SYS_TTY_CONFIG", Value: capability.CAP_SYS_TTY_CONFIG},
{Key: "MKNOD", Value: capability.CAP_MKNOD},
{Key: "AUDIT_WRITE", Value: capability.CAP_AUDIT_WRITE},
{Key: "AUDIT_CONTROL", Value: capability.CAP_AUDIT_CONTROL},
{Key: "MAC_OVERRIDE", Value: capability.CAP_MAC_OVERRIDE},
{Key: "MAC_ADMIN", Value: capability.CAP_MAC_ADMIN},
{Key: "NET_ADMIN", Value: capability.CAP_NET_ADMIN},
{Key: "SETPCAP", Value: capability.CAP_SETPCAP, Enabled: false},
{Key: "SYS_MODULE", Value: capability.CAP_SYS_MODULE, Enabled: false},
{Key: "SYS_RAWIO", Value: capability.CAP_SYS_RAWIO, Enabled: false},
{Key: "SYS_PACCT", Value: capability.CAP_SYS_PACCT, Enabled: false},
{Key: "SYS_ADMIN", Value: capability.CAP_SYS_ADMIN, Enabled: false},
{Key: "SYS_NICE", Value: capability.CAP_SYS_NICE, Enabled: false},
{Key: "SYS_RESOURCE", Value: capability.CAP_SYS_RESOURCE, Enabled: false},
{Key: "SYS_TIME", Value: capability.CAP_SYS_TIME, Enabled: false},
{Key: "SYS_TTY_CONFIG", Value: capability.CAP_SYS_TTY_CONFIG, Enabled: false},
{Key: "MKNOD", Value: capability.CAP_MKNOD, Enabled: false},
{Key: "AUDIT_WRITE", Value: capability.CAP_AUDIT_WRITE, Enabled: false},
{Key: "AUDIT_CONTROL", Value: capability.CAP_AUDIT_CONTROL, Enabled: false},
{Key: "MAC_OVERRIDE", Value: capability.CAP_MAC_OVERRIDE, Enabled: false},
{Key: "MAC_ADMIN", Value: capability.CAP_MAC_ADMIN, Enabled: false},
{Key: "NET_ADMIN", Value: capability.CAP_NET_ADMIN, Enabled: false},
}
)
type (
Namespace struct {
Key string
Value int
File string
Key string `json:"key,omitempty"`
Enabled bool `json:"enabled,omitempty"`
Value int `json:"value,omitempty"`
File string `json:"file,omitempty"`
}
Namespaces []*Namespace
)
@ -50,27 +50,11 @@ func (ns *Namespace) String() string {
return ns.Key
}
func (ns *Namespace) MarshalJSON() ([]byte, error) {
return json.Marshal(ns.Key)
}
func (ns *Namespace) UnmarshalJSON(src []byte) error {
var nsName string
if err := json.Unmarshal(src, &nsName); err != nil {
return err
}
ret := GetNamespace(nsName)
if ret == nil {
return ErrUnkownNamespace
}
*ns = *ret
return nil
}
func GetNamespace(key string) *Namespace {
for _, ns := range namespaceList {
if ns.Key == key {
return ns
cpy := *ns
return &cpy
}
}
return nil
@ -79,18 +63,23 @@ func GetNamespace(key string) *Namespace {
// Contains returns true if the specified Namespace is
// in the slice
func (n Namespaces) Contains(ns string) bool {
return n.Get(ns) != nil
}
func (n Namespaces) Get(ns string) *Namespace {
for _, nsp := range n {
if nsp.Key == ns {
return true
return nsp
}
}
return false
return nil
}
type (
Capability struct {
Key string
Value capability.Cap
Key string `json:"key,omitempty"`
Enabled bool `json:"enabled"`
Value capability.Cap `json:"value,omitempty"`
}
Capabilities []*Capability
)
@ -99,27 +88,11 @@ func (c *Capability) String() string {
return c.Key
}
func (c *Capability) MarshalJSON() ([]byte, error) {
return json.Marshal(c.Key)
}
func (c *Capability) UnmarshalJSON(src []byte) error {
var capName string
if err := json.Unmarshal(src, &capName); err != nil {
return err
}
ret := GetCapability(capName)
if ret == nil {
return ErrUnkownCapability
}
*c = *ret
return nil
}
func GetCapability(key string) *Capability {
for _, capp := range capabilityList {
if capp.Key == key {
return capp
cpy := *capp
return &cpy
}
}
return nil
@ -128,10 +101,14 @@ func GetCapability(key string) *Capability {
// Contains returns true if the specified Capability is
// in the slice
func (c Capabilities) Contains(capp string) bool {
return c.Get(capp) != nil
}
func (c Capabilities) Get(capp string) *Capability {
for _, cap := range c {
if cap.Key == capp {
return true
return cap
}
}
return false
return nil
}

12
pkg/libcontainer/types_linux.go
View file

@ -6,11 +6,11 @@ import (
func init() {
namespaceList = Namespaces{
{Key: "NEWNS", Value: syscall.CLONE_NEWNS, File: "mnt"},
{Key: "NEWUTS", Value: syscall.CLONE_NEWUTS, File: "uts"},
{Key: "NEWIPC", Value: syscall.CLONE_NEWIPC, File: "ipc"},
{Key: "NEWUSER", Value: syscall.CLONE_NEWUSER, File: "user"},
{Key: "NEWPID", Value: syscall.CLONE_NEWPID, File: "pid"},
{Key: "NEWNET", Value: syscall.CLONE_NEWNET, File: "net"},
{Key: "NEWNS", Value: syscall.CLONE_NEWNS, File: "mnt", Enabled: true},
{Key: "NEWUTS", Value: syscall.CLONE_NEWUTS, File: "uts", Enabled: true},
{Key: "NEWIPC", Value: syscall.CLONE_NEWIPC, File: "ipc", Enabled: true},
{Key: "NEWUSER", Value: syscall.CLONE_NEWUSER, File: "user", Enabled: true},
{Key: "NEWPID", Value: syscall.CLONE_NEWPID, File: "pid", Enabled: true},
{Key: "NEWNET", Value: syscall.CLONE_NEWNET, File: "net", Enabled: true},
}
}

22
runconfig/parse.go
View file

@ -4,10 +4,8 @@ import (
"fmt"
"github.com/dotcloud/docker/nat"
"github.com/dotcloud/docker/opts"
"github.com/dotcloud/docker/pkg/label"
flag "github.com/dotcloud/docker/pkg/mflag"
"github.com/dotcloud/docker/pkg/sysinfo"
"github.com/dotcloud/docker/runtime/execdriver"
"github.com/dotcloud/docker/utils"
"io/ioutil"
"path"
@ -34,10 +32,6 @@ func ParseSubcommand(cmd *flag.FlagSet, args []string, sysInfo *sysinfo.SysInfo)
}
func parseRun(cmd *flag.FlagSet, args []string, sysInfo *sysinfo.SysInfo) (*Config, *HostConfig, *flag.FlagSet, error) {
var (
processLabel string
mountLabel string
)
var (
// FIXME: use utils.ListOpts for attach and volumes?
flAttach = opts.NewListOpts(opts.ValidateAttach)
@ -68,7 +62,6 @@ func parseRun(cmd *flag.FlagSet, args []string, sysInfo *sysinfo.SysInfo) (*Conf
flUser = cmd.String([]string{"u", "-user"}, "", "Username or UID")
flWorkingDir = cmd.String([]string{"w", "-workdir"}, "", "Working directory inside the container")
flCpuShares = cmd.Int64([]string{"c", "-cpu-shares"}, 0, "CPU shares (relative weight)")
flLabelOptions = cmd.String([]string{"Z", "-label"}, "", "Options to pass to underlying labeling system")
// For documentation purpose
_ = cmd.Bool([]string{"#sig-proxy", "-sig-proxy"}, true, "Proxify all received signal to the process (even in non-tty mode)")
@ -161,15 +154,6 @@ func parseRun(cmd *flag.FlagSet, args []string, sysInfo *sysinfo.SysInfo) (*Conf
entrypoint = []string{*flEntrypoint}
}
if !*flPrivileged {
pLabel, mLabel, e := label.GenLabels(*flLabelOptions)
if e != nil {
return nil, nil, cmd, fmt.Errorf("Invalid security labels : %s", e)
}
processLabel = pLabel
mountLabel = mLabel
}
lxcConf, err := parseKeyValueOpts(flLxcOpts)
if err != nil {
return nil, nil, cmd, err
@ -238,10 +222,6 @@ func parseRun(cmd *flag.FlagSet, args []string, sysInfo *sysinfo.SysInfo) (*Conf
VolumesFrom: strings.Join(flVolumesFrom.GetAll(), ","),
Entrypoint: entrypoint,
WorkingDir: *flWorkingDir,
Context: execdriver.Context{
"mount_label": mountLabel,
"process_label": processLabel,
},
}
driverOptions, err := parseDriverOpts(flDriverOpts)
@ -279,6 +259,8 @@ func parseDriverOpts(opts opts.ListOpts) (map[string][]string, error) {
parts := strings.SplitN(o, ".", 2)
if len(parts) < 2 {
return nil, fmt.Errorf("invalid opt format %s", o)
} else if strings.TrimSpace(parts[0]) == "" {
return nil, fmt.Errorf("key cannot be empty %s", o)
}
values, exists := out[parts[0]]
if !exists {

1
runtime/container.go
View file

@ -404,7 +404,6 @@ func populateCommand(c *Container) {
User: c.Config.User,
Config: driverConfig,
Resources: resources,
Context: c.Config.Context,
}
c.command.SysProcAttr = &syscall.SysProcAttr{Setsid: true}
}

1
runtime/execdriver/driver.go
View file

@ -125,7 +125,6 @@ type Command struct {
Arguments []string `json:"arguments"`
WorkingDir string `json:"working_dir"`
ConfigPath string `json:"config_path"` // this should be able to be removed when the lxc template is moved into the driver
Context Context `json:"context"` // generic context for specific options (apparmor, selinux)
Tty bool `json:"tty"`
Network *Network `json:"network"`
Config map[string][]string `json:"config"` // generic values that specific drivers can consume

24
runtime/execdriver/lxc/driver.go
View file

@ -3,6 +3,7 @@ package lxc
import (
"fmt"
"github.com/dotcloud/docker/pkg/cgroups"
"github.com/dotcloud/docker/pkg/label"
"github.com/dotcloud/docker/runtime/execdriver"
"github.com/dotcloud/docker/utils"
"io/ioutil"
@ -378,19 +379,34 @@ func rootIsShared() bool {
}
func (d *driver) generateLXCConfig(c *execdriver.Command) (string, error) {
root := path.Join(d.root, "containers", c.ID, "config.lxc")
var (
process, mount string
root = path.Join(d.root, "containers", c.ID, "config.lxc")
labels = c.Config["label"]
)
fo, err := os.Create(root)
if err != nil {
return "", err
}
defer fo.Close()
if len(labels) > 0 {
process, mount, err = label.GenLabels(labels[0])
if err != nil {
return "", err
}
}
if err := LxcTemplateCompiled.Execute(fo, struct {
*execdriver.Command
AppArmor bool
AppArmor bool
ProcessLabel string
MountLabel string
}{
Command: c,
AppArmor: d.apparmor,
Command: c,
AppArmor: d.apparmor,
ProcessLabel: process,
MountLabel: mount,
}); err != nil {
return "", err
}

27
runtime/execdriver/lxc/lxc_template.go
View file

@ -30,9 +30,9 @@ lxc.pts = 1024
# disable the main console
lxc.console = none
{{if getProcessLabel .Context}}
lxc.se_context = {{ getProcessLabel .Context}}
{{$MOUNTLABEL := getMountLabel .Context}}
{{if .ProcessLabel}}
lxc.se_context = {{ .ProcessLabel}}
{{$MOUNTLABEL := .MountLabel}}
{{end}}
# no controlling tty at all
@ -125,7 +125,7 @@ lxc.cgroup.cpu.shares = {{.Resources.CpuShares}}
{{if .Config.lxc}}
{{range $value := .Config.lxc}}
{{$value}}
lxc.{{$value}}
{{end}}
{{end}}
`
@ -147,12 +147,23 @@ func getMemorySwap(v *execdriver.Resources) int64 {
return v.Memory * 2
}
func getProcessLabel(c execdriver.Context) string {
return c["process_label"]
func getProcessLabel(c map[string][]string) string {
return getLabel(c, "process")
}
func getMountLabel(c execdriver.Context) string {
return c["mount_label"]
func getMountLabel(c map[string][]string) string {
return getLabel(c, "mount")
}
func getLabel(c map[string][]string, name string) string {
label := c["label"]
for _, l := range label {
parts := strings.SplitN(l, "=", 2)
if strings.TrimSpace(parts[0]) == name {
return strings.TrimSpace(parts[1])
}
}
return ""
}
func init() {

186
runtime/execdriver/native/configuration/parse.go Normal file
View file

@ -0,0 +1,186 @@
package configuration
import (
"fmt"
"github.com/dotcloud/docker/pkg/libcontainer"
"github.com/dotcloud/docker/utils"
"os/exec"
"path/filepath"
"strconv"
"strings"
)
type Action func(*libcontainer.Container, interface{}, string) error
var actions = map[string]Action{
"cap.add": addCap, // add a cap
"cap.drop": dropCap, // drop a cap
"ns.add": addNamespace, // add a namespace
"ns.drop": dropNamespace, // drop a namespace when cloning
"net.join": joinNetNamespace, // join another containers net namespace
"cgroups.cpu_shares": cpuShares, // set the cpu shares
"cgroups.memory": memory, // set the memory limit
"cgroups.memory_swap": memorySwap, // set the memory swap limit
"cgroups.cpuset.cpus": cpusetCpus, // set the cpus used
"apparmor_profile": apparmorProfile, // set the apparmor profile to apply
"fs.readonly": readonlyFs, // make the rootfs of the container read only
}
func cpusetCpus(container *libcontainer.Container, context interface{}, value string) error {
if container.Cgroups == nil {
return fmt.Errorf("cannot set cgroups when they are disabled")
}
container.Cgroups.CpusetCpus = value
return nil
}
func apparmorProfile(container *libcontainer.Container, context interface{}, value string) error {
container.Context["apparmor_profile"] = value
return nil
}
func cpuShares(container *libcontainer.Container, context interface{}, value string) error {
if container.Cgroups == nil {
return fmt.Errorf("cannot set cgroups when they are disabled")
}
v, err := strconv.ParseInt(value, 10, 0)
if err != nil {
return err
}
container.Cgroups.CpuShares = v
return nil
}
func memory(container *libcontainer.Container, context interface{}, value string) error {
if container.Cgroups == nil {
return fmt.Errorf("cannot set cgroups when they are disabled")
}
v, err := utils.RAMInBytes(value)
if err != nil {
return err
}
container.Cgroups.Memory = v
return nil
}
func memorySwap(container *libcontainer.Container, context interface{}, value string) error {
if container.Cgroups == nil {
return fmt.Errorf("cannot set cgroups when they are disabled")
}
v, err := strconv.ParseInt(value, 0, 64)
if err != nil {
return err
}
container.Cgroups.MemorySwap = v
return nil
}
func addCap(container *libcontainer.Container, context interface{}, value string) error {
c := container.CapabilitiesMask.Get(value)
if c == nil {
return fmt.Errorf("%s is not a valid capability", value)
}
c.Enabled = true
return nil
}
func dropCap(container *libcontainer.Container, context interface{}, value string) error {
c := container.CapabilitiesMask.Get(value)
if c == nil {
return fmt.Errorf("%s is not a valid capability", value)
}
c.Enabled = false
return nil
}
func addNamespace(container *libcontainer.Container, context interface{}, value string) error {
ns := container.Namespaces.Get(value)
if ns == nil {
return fmt.Errorf("%s is not a valid namespace", value[1:])
}
ns.Enabled = true
return nil
}
func dropNamespace(container *libcontainer.Container, context interface{}, value string) error {
ns := container.Namespaces.Get(value)
if ns == nil {
return fmt.Errorf("%s is not a valid namespace", value[1:])
}
ns.Enabled = false
return nil
}
func readonlyFs(container *libcontainer.Container, context interface{}, value string) error {
switch value {
case "1", "true":
container.ReadonlyFs = true
default:
container.ReadonlyFs = false
}
return nil
}
func joinNetNamespace(container *libcontainer.Container, context interface{}, value string) error {
var (
running = context.(map[string]*exec.Cmd)
cmd = running[value]
)
if cmd == nil || cmd.Process == nil {
return fmt.Errorf("%s is not a valid running container to join", value)
}
nspath := filepath.Join("/proc", fmt.Sprint(cmd.Process.Pid), "ns", "net")
container.Networks = append(container.Networks, &libcontainer.Network{
Type: "netns",
Context: libcontainer.Context{
"nspath": nspath,
},
})
return nil
}
func vethMacAddress(container *libcontainer.Container, context interface{}, value string) error {
var veth *libcontainer.Network
for _, network := range container.Networks {
if network.Type == "veth" {
veth = network
break
}
}
if veth == nil {
return fmt.Errorf("not veth configured for container")
}
veth.Context["mac"] = value
return nil
}
// configureCustomOptions takes string commands from the user and allows modification of the
// container's default configuration.
//
// TODO: this can be moved to a general utils or parser in pkg
func ParseConfiguration(container *libcontainer.Container, running map[string]*exec.Cmd, opts []string) error {
for _, opt := range opts {
kv := strings.SplitN(opt, "=", 2)
if len(kv) < 2 {
return fmt.Errorf("invalid format for %s", opt)
}
action, exists := actions[kv[0]]
if !exists {
return fmt.Errorf("%s is not a valid option for the native driver", kv[0])
}
if err := action(container, running, kv[1]); err != nil {
return err
}
}
return nil
}

166
runtime/execdriver/native/configuration/parse_test.go Normal file
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@ -0,0 +1,166 @@
package configuration
import (
"github.com/dotcloud/docker/runtime/execdriver/native/template"
"testing"
)
func TestSetReadonlyRootFs(t *testing.T) {
var (
container = template.New()
opts = []string{
"fs.readonly=true",
}
)
if container.ReadonlyFs {
t.Fatal("container should not have a readonly rootfs by default")
}
if err := ParseConfiguration(container, nil, opts); err != nil {
t.Fatal(err)
}
if !container.ReadonlyFs {
t.Fatal("container should have a readonly rootfs")
}
}
func TestConfigurationsDoNotConflict(t *testing.T) {
var (
container1 = template.New()
container2 = template.New()
opts = []string{
"cap.add=NET_ADMIN",
}
)
if err := ParseConfiguration(container1, nil, opts); err != nil {
t.Fatal(err)
}
if !container1.CapabilitiesMask.Get("NET_ADMIN").Enabled {
t.Fatal("container one should have NET_ADMIN enabled")
}
if container2.CapabilitiesMask.Get("NET_ADMIN").Enabled {
t.Fatal("container two should not have NET_ADMIN enabled")
}
}
func TestCpusetCpus(t *testing.T) {
var (
container = template.New()
opts = []string{
"cgroups.cpuset.cpus=1,2",
}
)
if err := ParseConfiguration(container, nil, opts); err != nil {
t.Fatal(err)
}
if expected := "1,2"; container.Cgroups.CpusetCpus != expected {
t.Fatalf("expected %s got %s for cpuset.cpus", expected, container.Cgroups.CpusetCpus)
}
}
func TestAppArmorProfile(t *testing.T) {
var (
container = template.New()
opts = []string{
"apparmor_profile=koye-the-protector",
}
)
if err := ParseConfiguration(container, nil, opts); err != nil {
t.Fatal(err)
}
if expected := "koye-the-protector"; container.Context["apparmor_profile"] != expected {
t.Fatalf("expected profile %s got %s", expected, container.Context["apparmor_profile"])
}
}
func TestCpuShares(t *testing.T) {
var (
container = template.New()
opts = []string{
"cgroups.cpu_shares=1048",
}
)
if err := ParseConfiguration(container, nil, opts); err != nil {
t.Fatal(err)
}
if expected := int64(1048); container.Cgroups.CpuShares != expected {
t.Fatalf("expected cpu shares %d got %d", expected, container.Cgroups.CpuShares)
}
}
func TestCgroupMemory(t *testing.T) {
var (
container = template.New()
opts = []string{
"cgroups.memory=500m",
}
)
if err := ParseConfiguration(container, nil, opts); err != nil {
t.Fatal(err)
}
if expected := int64(500 * 1024 * 1024); container.Cgroups.Memory != expected {
t.Fatalf("expected memory %d got %d", expected, container.Cgroups.Memory)
}
}
func TestAddCap(t *testing.T) {
var (
container = template.New()
opts = []string{
"cap.add=MKNOD",
"cap.add=SYS_ADMIN",
}
)
if err := ParseConfiguration(container, nil, opts); err != nil {
t.Fatal(err)
}
if !container.CapabilitiesMask.Get("MKNOD").Enabled {
t.Fatal("container should have MKNOD enabled")
}
if !container.CapabilitiesMask.Get("SYS_ADMIN").Enabled {
t.Fatal("container should have SYS_ADMIN enabled")
}
}
func TestDropCap(t *testing.T) {
var (
container = template.New()
opts = []string{
"cap.drop=MKNOD",
}
)
// enabled all caps like in privileged mode
for _, c := range container.CapabilitiesMask {
c.Enabled = true
}
if err := ParseConfiguration(container, nil, opts); err != nil {
t.Fatal(err)
}
if container.CapabilitiesMask.Get("MKNOD").Enabled {
t.Fatal("container should not have MKNOD enabled")
}
}
func TestDropNamespace(t *testing.T) {
var (
container = template.New()
opts = []string{
"ns.drop=NEWNET",
}
)
if err := ParseConfiguration(container, nil, opts); err != nil {
t.Fatal(err)
}
if container.Namespaces.Get("NEWNET").Enabled {
t.Fatal("container should not have NEWNET enabled")
}
}

114
runtime/execdriver/native/create.go Normal file
View file

@ -0,0 +1,114 @@
package native
import (
"fmt"
"os"
"github.com/dotcloud/docker/pkg/label"
"github.com/dotcloud/docker/pkg/libcontainer"
"github.com/dotcloud/docker/runtime/execdriver"
"github.com/dotcloud/docker/runtime/execdriver/native/configuration"
"github.com/dotcloud/docker/runtime/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.Container, 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
// check to see if we are running in ramdisk to disable pivot root
container.NoPivotRoot = os.Getenv("DOCKER_RAMDISK") != ""
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
}
if err := configuration.ParseConfiguration(container, d.activeContainers, c.Config["native"]); err != nil {
return nil, err
}
return container, nil
}
func (d *driver) createNetwork(container *libcontainer.Container, c *execdriver.Command) error {
container.Networks = []*libcontainer.Network{
{
Mtu: c.Network.Mtu,
Address: fmt.Sprintf("%s/%d", "127.0.0.1", 0),
Gateway: "localhost",
Type: "loopback",
Context: libcontainer.Context{},
},
}
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",
Context: libcontainer.Context{
"prefix": "veth",
"bridge": c.Network.Interface.Bridge,
},
}
container.Networks = append(container.Networks, &vethNetwork)
}
return nil
}
func (d *driver) setPrivileged(container *libcontainer.Container) error {
for _, c := range container.CapabilitiesMask {
c.Enabled = true
}
container.Cgroups.DeviceAccess = true
container.Context["apparmor_profile"] = "unconfined"
return nil
}
func (d *driver) setupCgroups(container *libcontainer.Container, c *execdriver.Command) error {
if c.Resources != nil {
container.Cgroups.CpuShares = c.Resources.CpuShares
container.Cgroups.Memory = c.Resources.Memory
container.Cgroups.MemorySwap = c.Resources.MemorySwap
}
return nil
}
func (d *driver) setupMounts(container *libcontainer.Container, c *execdriver.Command) error {
for _, m := range c.Mounts {
container.Mounts = append(container.Mounts, libcontainer.Mount{m.Source, m.Destination, m.Writable, m.Private})
}
return nil
}
func (d *driver) setupLabels(container *libcontainer.Container, c *execdriver.Command) error {
labels := c.Config["label"]
if len(labels) > 0 {
process, mount, err := label.GenLabels(labels[0])
if err != nil {
return err
}
container.Context["mount_label"] = mount
container.Context["process_label"] = process
}
return nil
}

122
runtime/execdriver/native/default_template.go
View file

@ -1,122 +0,0 @@
package native
import (
"fmt"
"github.com/dotcloud/docker/pkg/cgroups"
"github.com/dotcloud/docker/pkg/libcontainer"
"github.com/dotcloud/docker/runtime/execdriver"
"github.com/dotcloud/docker/utils"
"os"
)
// createContainer populates and configures the container type with the
// data provided by the execdriver.Command
func createContainer(c *execdriver.Command) *libcontainer.Container {
container := getDefaultTemplate()
container.Hostname = getEnv("HOSTNAME", c.Env)
container.Tty = c.Tty
container.User = c.User
container.WorkingDir = c.WorkingDir
container.Env = c.Env
container.Context["mount_label"] = c.Context["mount_label"]
container.Context["process_label"] = c.Context["process_label"]
loopbackNetwork := libcontainer.Network{
Mtu: c.Network.Mtu,
Address: fmt.Sprintf("%s/%d", "127.0.0.1", 0),
Gateway: "localhost",
Type: "loopback",
Context: libcontainer.Context{},
}
container.Networks = []*libcontainer.Network{
&loopbackNetwork,
}
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",
Context: libcontainer.Context{
"prefix": "veth",
"bridge": c.Network.Interface.Bridge,
},
}
container.Networks = append(container.Networks, &vethNetwork)
}
container.Cgroups.Name = c.ID
if c.Privileged {
container.CapabilitiesMask = nil
container.Cgroups.DeviceAccess = true
container.Context["apparmor_profile"] = "unconfined"
}
if c.Resources != nil {
container.Cgroups.CpuShares = c.Resources.CpuShares
container.Cgroups.Memory = c.Resources.Memory
container.Cgroups.MemorySwap = c.Resources.MemorySwap
}
if opts, ok := c.Config["unit"]; ok {
props := [][2]string{}
for _, opt := range opts {
key, value, err := utils.ParseKeyValueOpt(opt)
if err == nil {
props = append(props, [2]string{key, value})
} else {
props = append(props, [2]string{opt, ""})
}
}
container.Cgroups.UnitProperties = props
}
// check to see if we are running in ramdisk to disable pivot root
container.NoPivotRoot = os.Getenv("DOCKER_RAMDISK") != ""
for _, m := range c.Mounts {
container.Mounts = append(container.Mounts, libcontainer.Mount{m.Source, m.Destination, m.Writable, m.Private})
}
return container
}
// getDefaultTemplate returns the docker default for
// the libcontainer configuration file
func getDefaultTemplate() *libcontainer.Container {
return &libcontainer.Container{
CapabilitiesMask: libcontainer.Capabilities{
libcontainer.GetCapability("SETPCAP"),
libcontainer.GetCapability("SYS_MODULE"),
libcontainer.GetCapability("SYS_RAWIO"),
libcontainer.GetCapability("SYS_PACCT"),
libcontainer.GetCapability("SYS_ADMIN"),
libcontainer.GetCapability("SYS_NICE"),
libcontainer.GetCapability("SYS_RESOURCE"),
libcontainer.GetCapability("SYS_TIME"),
libcontainer.GetCapability("SYS_TTY_CONFIG"),
libcontainer.GetCapability("MKNOD"),
libcontainer.GetCapability("AUDIT_WRITE"),
libcontainer.GetCapability("AUDIT_CONTROL"),
libcontainer.GetCapability("MAC_OVERRIDE"),
libcontainer.GetCapability("MAC_ADMIN"),
libcontainer.GetCapability("NET_ADMIN"),
},
Namespaces: libcontainer.Namespaces{
libcontainer.GetNamespace("NEWNS"),
libcontainer.GetNamespace("NEWUTS"),
libcontainer.GetNamespace("NEWIPC"),
libcontainer.GetNamespace("NEWPID"),
libcontainer.GetNamespace("NEWNET"),
},
Cgroups: &cgroups.Cgroup{
Parent: "docker",
DeviceAccess: false,
},
Context: libcontainer.Context{
"apparmor_profile": "docker-default",
},
}
}

27
runtime/execdriver/native/driver.go
View file

@ -57,8 +57,9 @@ func init() {
}
type driver struct {
root string
initPath string
root string
initPath string
activeContainers map[string]*exec.Cmd
}
func NewDriver(root, initPath string) (*driver, error) {
@ -69,18 +70,22 @@ func NewDriver(root, initPath string) (*driver, error) {
return nil, err
}
return &driver{
root: root,
initPath: initPath,
root: root,
initPath: initPath,
activeContainers: make(map[string]*exec.Cmd),
}, nil
}
func (d *driver) Run(c *execdriver.Command, pipes *execdriver.Pipes, startCallback execdriver.StartCallback) (int, error) {
if err := d.validateCommand(c); err != nil {
// take the Command and populate the libcontainer.Container from it
container, err := d.createContainer(c)
if err != nil {
return -1, err
}
d.activeContainers[c.ID] = &c.Cmd
var (
term nsinit.Terminal
container = createContainer(c)
factory = &dockerCommandFactory{c: c, driver: d}
stateWriter = &dockerStateWriter{
callback: startCallback,
@ -181,16 +186,6 @@ func (d *driver) removeContainerRoot(id string) error {
return os.RemoveAll(filepath.Join(d.root, id))
}
func (d *driver) validateCommand(c *execdriver.Command) error {
// we need to check the Config of the command to make sure that we
// do not have any of the lxc-conf variables
lxc := c.Config["lxc"]
if lxc != nil && len(lxc) > 0 {
return fmt.Errorf("lxc config options are not supported by the native driver")
}
return nil
}
func getEnv(key string, env []string) string {
for _, pair := range env {
parts := strings.Split(pair, "=")

43
runtime/execdriver/native/template/default_template.go Normal file
View file

@ -0,0 +1,43 @@
package template
import (
"github.com/dotcloud/docker/pkg/cgroups"
"github.com/dotcloud/docker/pkg/libcontainer"
)
// New returns the docker default configuration for libcontainer
func New() *libcontainer.Container {
return &libcontainer.Container{
CapabilitiesMask: libcontainer.Capabilities{
libcontainer.GetCapability("SETPCAP"),
libcontainer.GetCapability("SYS_MODULE"),
libcontainer.GetCapability("SYS_RAWIO"),
libcontainer.GetCapability("SYS_PACCT"),
libcontainer.GetCapability("SYS_ADMIN"),
libcontainer.GetCapability("SYS_NICE"),
libcontainer.GetCapability("SYS_RESOURCE"),
libcontainer.GetCapability("SYS_TIME"),
libcontainer.GetCapability("SYS_TTY_CONFIG"),
libcontainer.GetCapability("MKNOD"),
libcontainer.GetCapability("AUDIT_WRITE"),
libcontainer.GetCapability("AUDIT_CONTROL"),
libcontainer.GetCapability("MAC_OVERRIDE"),
libcontainer.GetCapability("MAC_ADMIN"),
libcontainer.GetCapability("NET_ADMIN"),
},
Namespaces: libcontainer.Namespaces{
libcontainer.GetNamespace("NEWNS"),
libcontainer.GetNamespace("NEWUTS"),
libcontainer.GetNamespace("NEWIPC"),
libcontainer.GetNamespace("NEWPID"),
libcontainer.GetNamespace("NEWNET"),
},
Cgroups: &cgroups.Cgroup{
Parent: "docker",
DeviceAccess: false,
},
Context: libcontainer.Context{
"apparmor_profile": "docker-default",
},
}
}

29
runtime/utils_test.go Normal file
View file

@ -0,0 +1,29 @@
package runtime
import (
"testing"
"github.com/dotcloud/docker/runconfig"
"github.com/dotcloud/docker/utils"
)
func TestMergeLxcConfig(t *testing.T) {
var (
hostConfig = &runconfig.HostConfig{
LxcConf: []utils.KeyValuePair{
{Key: "lxc.cgroups.cpuset", Value: "1,2"},
},
}
driverConfig = make(map[string][]string)
)
mergeLxcConfIntoOptions(hostConfig, driverConfig)
if l := len(driverConfig["lxc"]); l > 1 {
t.Fatalf("expected lxc options len of 1 got %d", l)
}
cpuset := driverConfig["lxc"][0]
if expected := "cgroups.cpuset=1,2"; cpuset != expected {
t.Fatalf("expected %s got %s", expected, cpuset)
}
}