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lcow: Allow the client to add or remove capabilities

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Signed-off-by: John Starks <jostarks@microsoft.com>
This commit is contained in:
John Starks 2018-06-15 15:36:10 -07:00
parent 3f405c48ff
commit 349aeeab7c
4 changed files with 39 additions and 29 deletions
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2
daemon/caps/utils_unix.go → daemon/caps/utils.go
View file

@ -1,5 +1,3 @@
// +build !windows
package caps // import "github.com/docker/docker/daemon/caps"
import (

31
daemon/oci.go Normal file
View file

@ -0,0 +1,31 @@
package daemon // import "github.com/docker/docker/daemon"
import (
"github.com/docker/docker/container"
"github.com/docker/docker/daemon/caps"
specs "github.com/opencontainers/runtime-spec/specs-go"
)
func setCapabilities(s *specs.Spec, c *container.Container) error {
var caplist []string
var err error
if c.HostConfig.Privileged {
caplist = caps.GetAllCapabilities()
} else {
caplist, err = caps.TweakCapabilities(s.Process.Capabilities.Bounding, c.HostConfig.CapAdd, c.HostConfig.CapDrop)
if err != nil {
return err
}
}
s.Process.Capabilities.Effective = caplist
s.Process.Capabilities.Bounding = caplist
s.Process.Capabilities.Permitted = caplist
s.Process.Capabilities.Inheritable = caplist
// setUser has already been executed here
// if non root drop capabilities in the way execve does
if s.Process.User.UID != 0 {
s.Process.Capabilities.Effective = []string{}
s.Process.Capabilities.Permitted = []string{}
}
return nil
}

25
daemon/oci_linux.go
View file

@ -13,7 +13,6 @@ import (
containertypes "github.com/docker/docker/api/types/container"
"github.com/docker/docker/container"
"github.com/docker/docker/daemon/caps"
daemonconfig "github.com/docker/docker/daemon/config"
"github.com/docker/docker/oci"
"github.com/docker/docker/pkg/idtools"
@ -249,30 +248,6 @@ func setNamespace(s *specs.Spec, ns specs.LinuxNamespace) {
s.Linux.Namespaces = append(s.Linux.Namespaces, ns)
}
func setCapabilities(s *specs.Spec, c *container.Container) error {
var caplist []string
var err error
if c.HostConfig.Privileged {
caplist = caps.GetAllCapabilities()
} else {
caplist, err = caps.TweakCapabilities(s.Process.Capabilities.Bounding, c.HostConfig.CapAdd, c.HostConfig.CapDrop)
if err != nil {
return err
}
}
s.Process.Capabilities.Effective = caplist
s.Process.Capabilities.Bounding = caplist
s.Process.Capabilities.Permitted = caplist
s.Process.Capabilities.Inheritable = caplist
// setUser has already been executed here
// if non root drop capabilities in the way execve does
if s.Process.User.UID != 0 {
s.Process.Capabilities.Effective = []string{}
s.Process.Capabilities.Permitted = []string{}
}
return nil
}
func setNamespaces(daemon *Daemon, s *specs.Spec, c *container.Container) error {
userNS := false
// user

10
daemon/oci_windows.go
View file

@ -211,7 +211,9 @@ func (daemon *Daemon) createSpec(c *container.Container) (*specs.Spec, error) {
if !system.LCOWSupported() {
return nil, fmt.Errorf("Linux containers on Windows are not supported")
}
daemon.createSpecLinuxFields(c, &s)
if err := daemon.createSpecLinuxFields(c, &s); err != nil {
return nil, err
}
default:
return nil, fmt.Errorf("Unsupported platform %q", img.OS)
}
@ -336,12 +338,16 @@ func (daemon *Daemon) createSpecWindowsFields(c *container.Container, s *specs.S
// Sets the Linux-specific fields of the OCI spec
// TODO: @jhowardmsft LCOW Support. We need to do a lot more pulling in what can
// be pulled in from oci_linux.go.
func (daemon *Daemon) createSpecLinuxFields(c *container.Container, s *specs.Spec) {
func (daemon *Daemon) createSpecLinuxFields(c *container.Container, s *specs.Spec) error {
if len(s.Process.Cwd) == 0 {
s.Process.Cwd = `/`
}
s.Root.Path = "rootfs"
s.Root.Readonly = c.HostConfig.ReadonlyRootfs
if err := setCapabilities(s, c); err != nil {
return fmt.Errorf("linux spec capabilities: %v", err)
}
return nil
}
func escapeArgs(args []string) []string {