execution: use provided process ID for state

Signed-off-by: Kenfe-Mickael Laventure <mickael.laventure@gmail.com>

execution/executor.go

@@ -16,6 +16,7 @@ type CreateOpts struct {
 }
 
 type StartProcessOpts struct {
+	ID      string
 	Spec    specs.Process
 	Console bool
 	Stdin   string

execution/executors/oci/oci.go

@@ -12,6 +12,10 @@ import (
 	"github.com/docker/containerd/execution"
 )
 
+const (
+	initProcessID = "init"
+)
+
 var (
 	ErrRootEmpty = errors.New("oci: runtime root cannot be an empty string")
 )
@@ -56,7 +60,7 @@ func (r *OCIRuntime) Create(ctx context.Context, id string, o execution.CreateOp
 		}
 	}(container)
 
-	initProcID, initStateDir, err := container.StateDir().NewProcess()
+	initStateDir, err := container.StateDir().NewProcess(initProcessID)
 	if err != nil {
 		return nil, err
 	}
@@ -80,7 +84,7 @@ func (r *OCIRuntime) Create(ctx context.Context, id string, o execution.CreateOp
 	if err != nil {
 		return nil, err
 	}
-	process, err := newProcess(initProcID, pid)
+	process, err := newProcess(container, initProcessID, pid)
 	if err != nil {
 		return nil, err
 	}
@@ -126,7 +130,7 @@ func (r *OCIRuntime) load(runcC *runc.Container) (*execution.Container, error) {
 			}
 			return nil, err
 		}
-		process, err := newProcess(filepath.Base(d), pid)
+		process, err := newProcess(container, filepath.Base(d), pid)
 		if err != nil {
 			return nil, err
 		}
@@ -198,13 +202,13 @@ func (r *OCIRuntime) StartProcess(ctx context.Context, c *execution.Container, o
 		}
 	}()
 
-	procID, procStateDir, err := c.StateDir().NewProcess()
+	procStateDir, err := c.StateDir().NewProcess(o.ID)
 	if err != nil {
 		return nil, err
 	}
 	defer func() {
 		if err != nil {
-			c.StateDir().DeleteProcess(procID)
+			c.StateDir().DeleteProcess(o.ID)
 		}
 	}()
 
@@ -223,7 +227,7 @@ func (r *OCIRuntime) StartProcess(ctx context.Context, c *execution.Container, o
 		return nil, err
 	}
 
-	process, err := newProcess(procID, pid)
+	process, err := newProcess(c, o.ID, pid)
 	if err != nil {
 		return nil, err
 	}

execution/executors/oci/process.go

@@ -7,22 +7,28 @@ import (
 	"github.com/docker/containerd/execution"
 )
 
-func newProcess(id string, pid int) (execution.Process, error) {
+func newProcess(c *execution.Container, id string, pid int) (execution.Process, error) {
 	proc, err := os.FindProcess(pid)
 	if err != nil {
 		return nil, err
 	}
 	return &process{
+		c:    c,
 		id:   id,
 		proc: proc,
 	}, nil
 }
 
 type process struct {
+	c    *execution.Container
 	id   string
 	proc *os.Process
 }
 
+func (p *process) Container() *execution.Container {
+	return p.c
+}
+
 func (p *process) ID() string {
 	return p.id
 }

execution/process.go

@@ -3,6 +3,7 @@ package execution
 import "os"
 
 type Process interface {
+	Container() *Container
 	ID() string
 	Pid() int64
 	//Spec() *specs.Process

execution/service.go

@@ -134,6 +134,7 @@ func (s *Service) StartProcess(ctx context.Context, r *api.StartProcessRequest)
 	}
 
 	process, err := s.executor.StartProcess(ctx, container, StartProcessOpts{
+		ID:      r.Process.ID,
 		Spec:    spec,
 		Console: r.Console,
 		Stdin:   r.Stdin,

execution/statedir.go

@@ -26,13 +26,13 @@ func (s StateDir) Delete() error {
 	return os.RemoveAll(string(s))
 }
 
-func (s StateDir) NewProcess() (id, dir string, err error) {
-	dir, err = ioutil.TempDir(s.processesDir(), "")
-	if err != nil {
-		return "", "", err
+func (s StateDir) NewProcess(id string) (dir string, err error) {
+	dir = filepath.Join(s.processesDir(), id)
+	if err = os.Mkdir(dir, 0700); err != nil {
+		return "", err
 	}
 
-	return filepath.Base(dir), dir, err
+	return dir, nil
 }
 
 func (s StateDir) ProcessDir(id string) string {