Update libcontainaer to d00b8369852285d6a830a8d3b9

Fixes #12015

Signed-off-by: Michael Crosby <crosbymichael@gmail.com>
(cherry picked from commit d12fef1515cb3f0938ea6ed8cab8351e2df2753e)

Docker-DCO-1.1-Signed-off-by: Jessie Frazelle <jess@docker.com> (github: jfrazelle)

Docker-DCO-1.1-Signed-off-by: Jessie Frazelle <hugs@docker.com> (github: jfrazelle)

hack/vendor.sh

@@ -75,7 +75,7 @@ rm -rf src/github.com/docker/distribution
 mkdir -p src/github.com/docker/distribution
 mv tmp-digest src/github.com/docker/distribution/digest
 
-clone git github.com/docker/libcontainer c8512754166539461fd860451ff1a0af7491c197
+clone git github.com/docker/libcontainer d00b8369852285d6a830a8d3b966608b2ed89705
 # see src/github.com/docker/libcontainer/update-vendor.sh which is the "source of truth" for libcontainer deps (just like this file)
 rm -rf src/github.com/docker/libcontainer/vendor
 eval "$(grep '^clone ' src/github.com/docker/libcontainer/update-vendor.sh | grep -v 'github.com/codegangsta/cli' | grep -v 'github.com/Sirupsen/logrus')"

vendor/src/github.com/docker/libcontainer/apparmor/gen.go

@@ -67,12 +67,12 @@ func generateProfile(out io.Writer) error {
 	data := &data{
 		Name: "docker-default",
 	}
-	if tuntablesExists() {
+	if tunablesExists() {
 		data.Imports = append(data.Imports, "#include <tunables/global>")
 	} else {
 		data.Imports = append(data.Imports, "@{PROC}=/proc/")
 	}
-	if abstrctionsEsists() {
+	if abstractionsExists() {
 		data.InnerImports = append(data.InnerImports, "#include <abstractions/base>")
 	}
 	if err := compiled.Execute(out, data); err != nil {
@@ -82,13 +82,13 @@ func generateProfile(out io.Writer) error {
 }
 
 // check if the tunables/global exist
-func tuntablesExists() bool {
+func tunablesExists() bool {
 	_, err := os.Stat("/etc/apparmor.d/tunables/global")
 	return err == nil
 }
 
 // check if abstractions/base exist
-func abstrctionsEsists() bool {
+func abstractionsExists() bool {
 	_, err := os.Stat("/etc/apparmor.d/abstractions/base")
 	return err == nil
 }

vendor/src/github.com/docker/libcontainer/cgroups/fs/freezer.go

@@ -1,6 +1,7 @@
 package fs
 
 import (
+	"fmt"
 	"strings"
 	"time"
 
@@ -41,6 +42,10 @@ func (s *FreezerGroup) Set(path string, cgroup *configs.Cgroup) error {
 			}
 			time.Sleep(1 * time.Millisecond)
 		}
+	case configs.Undefined:
+		return nil
+	default:
+		return fmt.Errorf("Invalid argument '%s' to freezer.state", string(cgroup.Freezer))
 	}
 
 	return nil

vendor/src/github.com/docker/libcontainer/cgroups/fs/freezer_test.go

@@ -0,0 +1,45 @@
+package fs
+
+import (
+	"testing"
+
+	"github.com/docker/libcontainer/configs"
+)
+
+func TestFreezerSetState(t *testing.T) {
+	helper := NewCgroupTestUtil("freezer", t)
+	defer helper.cleanup()
+
+	helper.writeFileContents(map[string]string{
+		"freezer.state": string(configs.Frozen),
+	})
+
+	helper.CgroupData.c.Freezer = configs.Thawed
+	freezer := &FreezerGroup{}
+	if err := freezer.Set(helper.CgroupPath, helper.CgroupData.c); err != nil {
+		t.Fatal(err)
+	}
+
+	value, err := getCgroupParamString(helper.CgroupPath, "freezer.state")
+	if err != nil {
+		t.Fatalf("Failed to parse freezer.state - %s", err)
+	}
+	if value != string(configs.Thawed) {
+		t.Fatal("Got the wrong value, set freezer.state failed.")
+	}
+}
+
+func TestFreezerSetInvalidState(t *testing.T) {
+	helper := NewCgroupTestUtil("freezer", t)
+	defer helper.cleanup()
+
+	const (
+		invalidArg configs.FreezerState = "Invalid"
+	)
+
+	helper.CgroupData.c.Freezer = invalidArg
+	freezer := &FreezerGroup{}
+	if err := freezer.Set(helper.CgroupPath, helper.CgroupData.c); err == nil {
+		t.Fatal("Failed to return invalid argument error")
+	}
+}

vendor/src/github.com/docker/libcontainer/cgroups/systemd/apply_systemd.go

@@ -218,16 +218,7 @@ func (m *Manager) Apply(pid int) error {
 	}
 
 	paths := make(map[string]string)
-	for _, sysname := range []string{
-		"devices",
-		"memory",
-		"cpu",
-		"cpuset",
-		"cpuacct",
-		"blkio",
-		"perf_event",
-		"freezer",
-	} {
+	for sysname := range subsystems {
 		subsystemPath, err := getSubsystemPath(m.Cgroups, sysname)
 		if err != nil {
 			// Don't fail if a cgroup hierarchy was not found, just skip this subsystem

vendor/src/github.com/docker/libcontainer/container_linux.go

@@ -140,7 +140,9 @@ func (c *linuxContainer) commandTemplate(p *Process, childPipe *os.File) (*exec.
 		cmd.SysProcAttr = &syscall.SysProcAttr{}
 	}
 	cmd.ExtraFiles = []*os.File{childPipe}
-	cmd.SysProcAttr.Pdeathsig = syscall.SIGKILL
+	// NOTE: when running a container with no PID namespace and the parent process spawning the container is
+	// PID1 the pdeathsig is being delivered to the container's init process by the kernel for some reason
+	// even with the parent still running.
 	if c.config.ParentDeathSignal > 0 {
 		cmd.SysProcAttr.Pdeathsig = syscall.Signal(c.config.ParentDeathSignal)
 	}

vendor/src/github.com/docker/libcontainer/init_linux.go

@@ -69,7 +69,8 @@ func newContainerInit(t initType, pipe *os.File) (initer, error) {
 		}, nil
 	case initStandard:
 		return &linuxStandardInit{
-			config: config,
+			parentPid: syscall.Getppid(),
+			config:    config,
 		}, nil
 	}
 	return nil, fmt.Errorf("unknown init type %q", t)

vendor/src/github.com/docker/libcontainer/nsinit/README.md

@@ -5,13 +5,15 @@ It is able to spawn new containers or join existing containers.
 
 ### How to build?
 
-First to add the `libcontainer/vendor` into your GOPATH. It's because something related with this [issue](https://github.com/docker/libcontainer/issues/210).
+First add the `libcontainer/vendor` into your GOPATH. It's because libcontainer
+vendors all its dependencies, so it can be built predictably.
 
 ```
 export GOPATH=$GOPATH:/your/path/to/libcontainer/vendor
 ```
 
-Then get into the nsinit folder and get the imported file. Use `make` command to make the nsinit binary.
+Then get into the nsinit folder and get the imported file. Use `make` command
+to make the nsinit binary.
 
 ```
 cd libcontainer/nsinit
@@ -19,7 +21,8 @@ go get
 make
 ```
 
-We have finished compiling the nsinit package, but a root filesystem must be provided for use along with a container configuration file.
+We have finished compiling the nsinit package, but a root filesystem must be
+provided for use along with a container configuration file.
 
 Choose a proper place to run your container. For example we use `/busybox`.
 
@@ -28,30 +31,37 @@ mkdir /busybox
 curl -sSL 'https://github.com/jpetazzo/docker-busybox/raw/buildroot-2014.11/rootfs.tar' | tar -xC /busybox
 ```
 
-Then you may need to write a configure file named `container.json` in the `/busybox` folder.
-Environment, networking, and different capabilities for the container are specified in this file.
-The configuration is used for each process executed inside the container
-See the `sample_configs` folder for examples of what the container configuration should look like.
+Then you may need to write a configuration file named `container.json` in the
+`/busybox` folder. Environment, networking, and different capabilities for
+the container are specified in this file. The configuration is used for each
+process executed inside the container.
+
+See the `sample_configs` folder for examples of what the container configuration
+should look like.
 
 ```
 cp libcontainer/sample_configs/minimal.json /busybox/container.json
 cd /busybox
 ```
 
-Now the nsinit is ready to work.
-To execute `/bin/bash` in the current directory as a container just run the following **as root**:
+You can customize `container.json` per your needs. After that, nsinit is
+ready to work.
+
+To execute `/bin/bash` in the current directory as a container just run the
+following **as root**:
+
 ```bash
-nsinit exec --tty /bin/bash
+nsinit exec --tty --config container.json /bin/bash
 ```
 
-If you wish to spawn another process inside the container while your 
-current bash session is running, run the same command again to 
-get another bash shell (or change the command).  If the original 
-process (PID 1) dies, all other processes spawned inside the container 
-will be killed and the namespace will be removed. 
+If you wish to spawn another process inside the container while your current
+bash session is running, run the same command again to get another bash shell
+(or change the command).  If the original process (PID 1) dies, all other
+processes spawned inside the container will be killed and the namespace will
+be removed. 
 
-You can identify if a process is running in a container by 
-looking to see if `state.json` is in the root of the directory.
+You can identify if a process is running in a container by looking to see if
+`state.json` is in the root of the directory.
    
-You may also specify an alternate root place where 
-the `container.json` file is read and where the `state.json` file will be saved.
+You may also specify an alternate root directory from where the `container.json`
+file is read and where the `state.json` file will be saved.

vendor/src/github.com/docker/libcontainer/standard_init_linux.go

@@ -13,7 +13,8 @@ import (
 )
 
 type linuxStandardInit struct {
-	config *initConfig
+	parentPid int
+	config    *initConfig
 }
 
 func (l *linuxStandardInit) Init() error {
@@ -85,9 +86,10 @@ func (l *linuxStandardInit) Init() error {
 	if err := pdeath.Restore(); err != nil {
 		return err
 	}
-	// Signal self if parent is already dead. Does nothing if running in a new
-	// PID namespace, as Getppid will always return 0.
-	if syscall.Getppid() == 1 {
+	// compare the parent from the inital start of the init process and make sure that it did not change.
+	// if the parent changes that means it died and we were reparened to something else so we should
+	// just kill ourself and not cause problems for someone else.
+	if syscall.Getppid() != l.parentPid {
 		return syscall.Kill(syscall.Getpid(), syscall.SIGKILL)
 	}
 	return system.Execv(l.config.Args[0], l.config.Args[0:], os.Environ())