execution: remove oci executor

Signed-off-by: Kenfe-Mickael Laventure <mickael.laventure@gmail.com>
This commit is contained in:
Kenfe-Mickael Laventure 2017-01-18 14:38:32 -08:00
parent 0a58d55e63
commit 3f2d9d19bf
5 changed files with 1 additions and 467 deletions

View file

@ -20,7 +20,6 @@ import (
api "github.com/docker/containerd/api/execution" api "github.com/docker/containerd/api/execution"
"github.com/docker/containerd/events" "github.com/docker/containerd/events"
"github.com/docker/containerd/execution" "github.com/docker/containerd/execution"
"github.com/docker/containerd/execution/executors/oci"
"github.com/docker/containerd/execution/executors/shim" "github.com/docker/containerd/execution/executors/shim"
"github.com/docker/containerd/log" "github.com/docker/containerd/log"
metrics "github.com/docker/go-metrics" metrics "github.com/docker/go-metrics"
@ -57,7 +56,7 @@ high performance container runtime
cli.StringFlag{ cli.StringFlag{
Name: "runtime", Name: "runtime",
Usage: "runtime for execution", Usage: "runtime for execution",
Value: "runc", Value: "shim",
}, },
cli.StringFlag{ cli.StringFlag{
Name: "socket, s", Name: "socket, s",
@ -119,11 +118,6 @@ high performance container runtime
runtime = context.GlobalString("runtime") runtime = context.GlobalString("runtime")
) )
switch runtime { switch runtime {
case "runc":
executor, err = oci.New(context.GlobalString("root"))
if err != nil {
return err
}
case "shim": case "shim":
root := filepath.Join(context.GlobalString("root"), "shim") root := filepath.Join(context.GlobalString("root"), "shim")
err = os.Mkdir(root, 0700) err = os.Mkdir(root, 0700)

View file

@ -1,54 +0,0 @@
package oci
import (
"fmt"
"os"
"syscall"
"unsafe"
)
// newConsole returns an initialized console that can be used within a container by copying bytes
// from the master side to the slave that is attached as the tty for the container's init process.
func newConsole(uid, gid int) (*os.File, string, error) {
master, err := os.OpenFile("/dev/ptmx", syscall.O_RDWR|syscall.O_NOCTTY|syscall.O_CLOEXEC, 0)
if err != nil {
return nil, "", err
}
console, err := ptsname(master)
if err != nil {
return nil, "", err
}
if err := unlockpt(master); err != nil {
return nil, "", err
}
if err := os.Chmod(console, 0600); err != nil {
return nil, "", err
}
if err := os.Chown(console, uid, gid); err != nil {
return nil, "", err
}
return master, console, nil
}
func ioctl(fd uintptr, flag, data uintptr) error {
if _, _, err := syscall.Syscall(syscall.SYS_IOCTL, fd, flag, data); err != 0 {
return err
}
return nil
}
// unlockpt unlocks the slave pseudoterminal device corresponding to the master pseudoterminal referred to by f.
// unlockpt should be called before opening the slave side of a pty.
func unlockpt(f *os.File) error {
var u int32
return ioctl(f.Fd(), syscall.TIOCSPTLCK, uintptr(unsafe.Pointer(&u)))
}
// ptsname retrieves the name of the first available pts for the given master.
func ptsname(f *os.File) (string, error) {
var n int32
if err := ioctl(f.Fd(), syscall.TIOCGPTN, uintptr(unsafe.Pointer(&n))); err != nil {
return "", err
}
return fmt.Sprintf("/dev/pts/%d", n), nil
}

View file

@ -1,53 +0,0 @@
package oci
import (
"io"
"os"
"github.com/crosbymichael/go-runc"
)
type OIO struct {
master *os.File // master holds a fd to the created pty if any
console string // console holds the path to the slave linked to master
rio runc.IO // rio holds the open fifos for stdios
}
func newOIO(stdin, stdout, stderr string, console bool) (o OIO, err error) {
defer func() {
if err != nil {
o.cleanup()
}
}()
if o.rio.Stdin, err = os.OpenFile(stdin, os.O_RDONLY, 0); err != nil {
return
}
if o.rio.Stdout, err = os.OpenFile(stdout, os.O_WRONLY, 0); err != nil {
return
}
if o.rio.Stderr, err = os.OpenFile(stderr, os.O_WRONLY, 0); err != nil {
return
}
if console {
o.master, o.console, err = newConsole(0, 0)
if err != nil {
return
}
go io.Copy(o.master, o.rio.Stdin)
go func() {
io.Copy(o.rio.Stdout, o.master)
o.master.Close()
}()
}
return
}
func (o OIO) cleanup() {
if o.master != nil {
o.master.Close()
}
o.rio.Close()
}

View file

@ -1,251 +0,0 @@
package oci
import (
"context"
"errors"
"fmt"
"os"
"path/filepath"
"syscall"
"github.com/crosbymichael/go-runc"
"github.com/docker/containerd/execution"
"github.com/docker/containerd/sys"
)
const (
initProcessID = "init"
)
const (
PidFilename = "pid"
StartTimeFilename = "starttime"
)
var (
ErrRootEmpty = errors.New("oci: runtime root cannot be an empty string")
)
func New(root string) (*OCIRuntime, error) {
err := sys.SetSubreaper(1)
if err != nil {
return nil, err
}
go func() {
syscall.Wait4(-1, nil, 0, nil)
}()
return &OCIRuntime{
root: root,
runc: &runc.Runc{
Root: filepath.Join(root, "runc"),
},
ios: make(map[string]OIO),
}, nil
}
type OCIRuntime struct {
root string
runc *runc.Runc
ios map[string]OIO // ios tracks created process io for cleanup purpose on delete
}
func (r *OCIRuntime) Create(ctx context.Context, id string, o execution.CreateOpts) (container *execution.Container, err error) {
if o.Bundle == "" {
return nil, errors.New("bundle path cannot be an empty string")
}
oio, err := newOIO(o.Stdin, o.Stdout, o.Stderr, o.Console)
if err != nil {
return nil, err
}
defer func() {
if err != nil {
oio.cleanup()
}
}()
if container, err = execution.NewContainer(r.root, id, o.Bundle); err != nil {
return nil, err
}
defer func(c *execution.Container) {
if err != nil {
c.StateDir().Delete()
}
}(container)
initStateDir, err := container.StateDir().NewProcess(initProcessID)
if err != nil {
return nil, err
}
pidFile := filepath.Join(initStateDir, PidFilename)
err = r.runc.Create(ctx, id, o.Bundle, &runc.CreateOpts{
PidFile: pidFile,
Console: oio.console,
IO: oio.rio,
})
if err != nil {
return nil, err
}
defer func() {
if err != nil {
r.runc.Kill(ctx, id, int(syscall.SIGKILL))
r.runc.Delete(ctx, id)
}
}()
process, err := newProcess(initProcessID, initStateDir, execution.Created)
if err != nil {
return nil, err
}
container.AddProcess(process, true)
r.ios[id] = oio
return container, nil
}
func (r *OCIRuntime) Start(ctx context.Context, c *execution.Container) error {
return r.runc.Start(ctx, c.ID())
}
func (r *OCIRuntime) Status(ctx context.Context, c *execution.Container) (execution.Status, error) {
state, err := r.runc.State(ctx, c.ID())
if err != nil {
return "", err
}
return execution.Status(state.Status), nil
}
func (r *OCIRuntime) load(runcC *runc.Container) (*execution.Container, error) {
container := execution.LoadContainer(
execution.StateDir(filepath.Join(r.root, runcC.ID)),
runcC.ID,
runcC.Bundle,
execution.Status(runcC.Status),
)
dirs, err := container.StateDir().Processes()
if err != nil {
return nil, err
}
for _, d := range dirs {
process, err := newProcess(filepath.Base(d), d, execution.Running)
if err != nil {
return nil, err
}
container.AddProcess(process, process.Pid() == int64(runcC.Pid))
}
return container, nil
}
func (r *OCIRuntime) List(ctx context.Context) ([]*execution.Container, error) {
runcCs, err := r.runc.List(ctx)
if err != nil {
return nil, err
}
var containers []*execution.Container
for _, c := range runcCs {
select {
case <-ctx.Done():
return nil, ctx.Err()
default:
container, err := r.load(c)
if err != nil {
return nil, err
}
containers = append(containers, container)
}
}
return containers, nil
}
func (r *OCIRuntime) Load(ctx context.Context, id string) (*execution.Container, error) {
runcC, err := r.runc.State(ctx, id)
if err != nil {
return nil, err
}
return r.load(runcC)
}
func (r *OCIRuntime) Delete(ctx context.Context, c *execution.Container) error {
id := c.ID()
if err := r.runc.Delete(ctx, id); err != nil {
return err
}
c.StateDir().Delete()
r.ios[id].cleanup()
delete(r.ios, id)
return nil
}
func (r *OCIRuntime) Pause(ctx context.Context, c *execution.Container) error {
return r.runc.Pause(ctx, c.ID())
}
func (r *OCIRuntime) Resume(ctx context.Context, c *execution.Container) error {
return r.runc.Resume(ctx, c.ID())
}
func (r *OCIRuntime) StartProcess(ctx context.Context, c *execution.Container, o execution.StartProcessOpts) (p execution.Process, err error) {
oio, err := newOIO(o.Stdin, o.Stdout, o.Stderr, o.Console)
if err != nil {
return nil, err
}
defer func() {
if err != nil {
oio.cleanup()
}
}()
procStateDir, err := c.StateDir().NewProcess(o.ID)
if err != nil {
return nil, err
}
defer func() {
if err != nil {
c.StateDir().DeleteProcess(o.ID)
}
}()
pidFile := filepath.Join(procStateDir, PidFilename)
if err := r.runc.Exec(ctx, c.ID(), o.Spec, &runc.ExecOpts{
PidFile: pidFile,
Detach: false,
Console: oio.console,
Cwd: o.Spec.Cwd,
IO: oio.rio,
}); err != nil {
return nil, err
}
process, err := newProcess(o.ID, procStateDir, execution.Running)
if err != nil {
return nil, err
}
c.AddProcess(process, false)
r.ios[fmt.Sprintf("%s-%s", c.ID(), process.ID())] = oio
return process, nil
}
func (r *OCIRuntime) SignalProcess(ctx context.Context, c *execution.Container, id string, sig os.Signal) error {
process := c.GetProcess(id)
if process == nil {
return fmt.Errorf("Make a Process Not Found error")
}
return syscall.Kill(int(process.Pid()), sig.(syscall.Signal))
}
func (r *OCIRuntime) DeleteProcess(ctx context.Context, c *execution.Container, id string) error {
ioID := fmt.Sprintf("%s-%s", c.ID(), id)
r.ios[ioID].cleanup()
delete(r.ios, ioID)
c.RemoveProcess(id)
return c.StateDir().DeleteProcess(id)
}

View file

@ -1,102 +0,0 @@
package oci
import (
"fmt"
"io/ioutil"
"os"
"path/filepath"
"syscall"
"github.com/crosbymichael/go-runc"
"github.com/docker/containerd/execution"
starttime "github.com/opencontainers/runc/libcontainer/system"
)
func newProcess(id, stateDir string, status execution.Status) (execution.Process, error) {
pid, err := runc.ReadPidFile(filepath.Join(stateDir, PidFilename))
if err != nil {
return nil, err
}
if err := syscall.Kill(pid, 0); err != nil {
if err == syscall.ESRCH {
status = execution.Stopped
} else {
return nil, err
}
}
if status != execution.Stopped {
stime, err := starttime.GetProcessStartTime(pid)
switch {
case os.IsNotExist(err):
status = execution.Stopped
case err != nil:
return nil, err
default:
b, err := ioutil.ReadFile(filepath.Join(stateDir, StartTimeFilename))
switch {
case os.IsNotExist(err):
err = ioutil.WriteFile(filepath.Join(stateDir, StartTimeFilename), []byte(stime), 0600)
if err != nil {
return nil, err
}
case err != nil:
return nil, err
case string(b) != stime:
status = execution.Stopped
}
}
}
return &process{
id: id,
pid: pid,
status: status,
exitCode: execution.UnknownStatusCode,
}, nil
}
type process struct {
id string
pid int
status execution.Status
exitCode uint32
}
func (p *process) ID() string {
return p.id
}
func (p *process) Pid() int64 {
return int64(p.pid)
}
func (p *process) Wait() (uint32, error) {
if p.status != execution.Stopped {
var wstatus syscall.WaitStatus
_, err := syscall.Wait4(p.pid, &wstatus, 0, nil)
if err != nil {
// This process doesn't belong to us
p.exitCode = execution.UnknownStatusCode
return p.exitCode, nil
}
// TODO: implement kill-all if we are the init pid?
p.status = execution.Stopped
p.exitCode = uint32(wstatus.ExitStatus())
}
return p.exitCode, nil
}
func (p *process) Signal(s os.Signal) error {
if p.status != execution.Stopped {
sig, ok := s.(syscall.Signal)
if !ok {
return fmt.Errorf("invalid signal %v", s)
}
return syscall.Kill(p.pid, sig)
}
return execution.ErrProcessNotFound
}
func (p *process) Status() execution.Status {
return p.status
}