Merge pull request #446 from mlaventure/no-state-dir
Remove StateDir type
This commit is contained in:
Michael Crosby
GitHub
commit
0d11d1c26f
10 changed files with 309 additions and 740 deletions
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@ -20,7 +20,6 @@ import (
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api "github.com/docker/containerd/api/execution"
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"github.com/docker/containerd/events"
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"github.com/docker/containerd/execution"
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"github.com/docker/containerd/execution/executors/oci"
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"github.com/docker/containerd/execution/executors/shim"
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"github.com/docker/containerd/log"
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metrics "github.com/docker/go-metrics"
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@ -57,7 +56,7 @@ high performance container runtime
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cli.StringFlag{
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Name: "runtime",
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Usage: "runtime for execution",
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Value: "runc",
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Value: "shim",
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},
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cli.StringFlag{
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Name: "socket, s",
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@ -119,11 +118,6 @@ high performance container runtime
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runtime = context.GlobalString("runtime")
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)
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switch runtime {
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case "runc":
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executor, err = oci.New(context.GlobalString("root"))
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if err != nil {
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return err
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}
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case "shim":
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root := filepath.Join(context.GlobalString("root"), "shim")
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err = os.Mkdir(root, 0700)
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@ -1,91 +1,179 @@
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package execution
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import "fmt"
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import (
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"context"
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"io/ioutil"
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"os"
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"path/filepath"
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"sync"
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func NewContainer(stateRoot, id, bundle string) (*Container, error) {
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stateDir, err := NewStateDir(stateRoot, id)
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if err != nil {
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return nil, err
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}
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return &Container{
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"github.com/docker/containerd/log"
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"github.com/pkg/errors"
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)
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const (
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InitProcessID = "init"
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processesDirName = "processes"
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bundleFileName = "bundle"
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)
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func LoadContainer(ctx context.Context, stateDir, id string) (c *Container, err error) {
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c = &Container{
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id: id,
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bundle: bundle,
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stateDir: stateDir,
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status: Created,
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processes: make(map[string]Process),
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}, nil
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processes: make(map[string]Process, 1),
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ctx: ctx,
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status: Unknown,
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}
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data, err := ioutil.ReadFile(filepath.Join(stateDir, bundleFileName))
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if err != nil {
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err = errors.Wrapf(err, "failed to read bundle path")
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return
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}
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c.bundle = string(data)
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return
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}
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func LoadContainer(dir StateDir, id, bundle string, status Status) *Container {
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return &Container{
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func NewContainer(ctx context.Context, stateDir, id, bundle string) (c *Container, err error) {
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c = &Container{
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id: id,
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stateDir: dir,
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stateDir: stateDir,
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bundle: bundle,
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status: status,
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processes: make(map[string]Process),
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processes: make(map[string]Process, 1),
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status: Created,
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ctx: ctx,
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}
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defer func() {
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if err != nil {
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c.Cleanup()
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c = nil
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}
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}()
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if err = os.Mkdir(stateDir, 0700); err != nil {
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err = errors.Wrap(err, "failed to create container state dir")
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return
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}
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bundleFile := filepath.Join(stateDir, bundleFileName)
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if err = ioutil.WriteFile(bundleFile, []byte(bundle), 0600); err != nil {
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err = errors.Wrap(err, "failed to store bundle path")
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return
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}
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processesDir := filepath.Join(stateDir, processesDirName)
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if err = os.Mkdir(processesDir, 0700); err != nil {
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err = errors.Wrap(err, "failed to create processes statedir")
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return
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}
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return
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}
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type Container struct {
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id string
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stateDir string
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bundle string
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stateDir StateDir
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initPid int64
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processes map[string]Process
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status Status
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processes map[string]Process
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ctx context.Context
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mu sync.Mutex
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}
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func (c *Container) ID() string {
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return c.id
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}
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func (c *Container) Status() Status {
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for _, p := range c.processes {
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if p.Pid() == c.initPid {
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c.status = p.Status()
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break
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}
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}
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return c.status
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}
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func (c *Container) Bundle() string {
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return c.bundle
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}
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func (c *Container) StateDir() StateDir {
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return c.stateDir
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}
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func (c *Container) Wait() (uint32, error) {
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for _, p := range c.processes {
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if p.Pid() == c.initPid {
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return p.Wait()
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}
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}
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return 0, fmt.Errorf("no init process")
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initProcess := c.GetProcess(InitProcessID)
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return initProcess.Wait()
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}
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func (c *Container) AddProcess(p Process, isInit bool) {
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if isInit {
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c.initPid = p.Pid()
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}
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func (c *Container) Status() Status {
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initProcess := c.GetProcess(InitProcessID)
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return initProcess.Status()
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}
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func (c *Container) AddProcess(p Process) {
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c.mu.Lock()
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c.processes[p.ID()] = p
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c.mu.Unlock()
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}
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func (c *Container) RemoveProcess(id string) error {
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if _, ok := c.processes[id]; !ok {
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return errors.Errorf("no such process %s", id)
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}
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c.mu.Lock()
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delete(c.processes, id)
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c.mu.Unlock()
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processStateDir := filepath.Join(c.stateDir, processesDirName, id)
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err := os.RemoveAll(processStateDir)
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if err != nil {
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return errors.Wrap(err, "failed to remove process state dir")
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}
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return nil
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}
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func (c *Container) GetProcess(id string) Process {
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c.mu.Lock()
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defer c.mu.Unlock()
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return c.processes[id]
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}
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func (c *Container) RemoveProcess(id string) {
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delete(c.processes, id)
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func (c *Container) Processes() []Process {
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var procs []Process
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c.mu.Lock()
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for _, p := range c.processes {
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procs = append(procs, p)
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}
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c.mu.Unlock()
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return procs
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}
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func (c *Container) Processes() []Process {
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var out []Process
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for _, p := range c.processes {
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out = append(out, p)
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}
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return out
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// ProcessStateDir returns the path of the state dir for a given
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// process id. The process doesn't have to exist for this to succeed.
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func (c *Container) ProcessStateDir(id string) string {
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return filepath.Join(c.stateDir, processesDirName, id)
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}
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// ProcessesStateDir returns a map matching process ids to their state
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// directory
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func (c *Container) ProcessesStateDir() (map[string]string, error) {
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root := filepath.Join(c.stateDir, processesDirName)
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dirs, err := ioutil.ReadDir(root)
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if err != nil {
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return nil, errors.Wrapf(err, "failed to list processes state dirs")
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}
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procs := make(map[string]string, 1)
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for _, d := range dirs {
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if d.IsDir() {
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procs[d.Name()] = filepath.Join(root, d.Name())
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}
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}
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return procs, nil
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}
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func (c *Container) Cleanup() {
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if err := os.RemoveAll(c.stateDir); err != nil {
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log.G(c.ctx).Warnf("failed to remove container state dir: %v", err)
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}
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}
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func (c *Container) Context() context.Context {
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return c.ctx
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}
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@ -1,54 +0,0 @@
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package oci
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import (
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"fmt"
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"os"
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"syscall"
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"unsafe"
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)
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// newConsole returns an initialized console that can be used within a container by copying bytes
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// from the master side to the slave that is attached as the tty for the container's init process.
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func newConsole(uid, gid int) (*os.File, string, error) {
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master, err := os.OpenFile("/dev/ptmx", syscall.O_RDWR|syscall.O_NOCTTY|syscall.O_CLOEXEC, 0)
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if err != nil {
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return nil, "", err
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}
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console, err := ptsname(master)
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if err != nil {
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return nil, "", err
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}
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if err := unlockpt(master); err != nil {
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return nil, "", err
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}
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if err := os.Chmod(console, 0600); err != nil {
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return nil, "", err
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}
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if err := os.Chown(console, uid, gid); err != nil {
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return nil, "", err
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}
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return master, console, nil
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}
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func ioctl(fd uintptr, flag, data uintptr) error {
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if _, _, err := syscall.Syscall(syscall.SYS_IOCTL, fd, flag, data); err != 0 {
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return err
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}
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return nil
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}
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// unlockpt unlocks the slave pseudoterminal device corresponding to the master pseudoterminal referred to by f.
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// unlockpt should be called before opening the slave side of a pty.
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func unlockpt(f *os.File) error {
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var u int32
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return ioctl(f.Fd(), syscall.TIOCSPTLCK, uintptr(unsafe.Pointer(&u)))
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}
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// ptsname retrieves the name of the first available pts for the given master.
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func ptsname(f *os.File) (string, error) {
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var n int32
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if err := ioctl(f.Fd(), syscall.TIOCGPTN, uintptr(unsafe.Pointer(&n))); err != nil {
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return "", err
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}
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return fmt.Sprintf("/dev/pts/%d", n), nil
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}
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@ -1,53 +0,0 @@
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package oci
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import (
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"io"
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"os"
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"github.com/crosbymichael/go-runc"
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)
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type OIO struct {
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master *os.File // master holds a fd to the created pty if any
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console string // console holds the path to the slave linked to master
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rio runc.IO // rio holds the open fifos for stdios
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}
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func newOIO(stdin, stdout, stderr string, console bool) (o OIO, err error) {
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defer func() {
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if err != nil {
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o.cleanup()
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}
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}()
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if o.rio.Stdin, err = os.OpenFile(stdin, os.O_RDONLY, 0); err != nil {
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return
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}
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if o.rio.Stdout, err = os.OpenFile(stdout, os.O_WRONLY, 0); err != nil {
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return
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}
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if o.rio.Stderr, err = os.OpenFile(stderr, os.O_WRONLY, 0); err != nil {
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return
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}
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if console {
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o.master, o.console, err = newConsole(0, 0)
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if err != nil {
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return
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}
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go io.Copy(o.master, o.rio.Stdin)
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go func() {
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io.Copy(o.rio.Stdout, o.master)
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o.master.Close()
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}()
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}
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return
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}
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func (o OIO) cleanup() {
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if o.master != nil {
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o.master.Close()
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}
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o.rio.Close()
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}
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@ -1,251 +0,0 @@
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package oci
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import (
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"context"
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"errors"
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"fmt"
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"os"
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"path/filepath"
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"syscall"
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"github.com/crosbymichael/go-runc"
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"github.com/docker/containerd/execution"
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"github.com/docker/containerd/sys"
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)
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const (
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initProcessID = "init"
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)
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const (
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PidFilename = "pid"
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StartTimeFilename = "starttime"
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)
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var (
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ErrRootEmpty = errors.New("oci: runtime root cannot be an empty string")
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)
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func New(root string) (*OCIRuntime, error) {
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err := sys.SetSubreaper(1)
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if err != nil {
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return nil, err
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}
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go func() {
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syscall.Wait4(-1, nil, 0, nil)
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}()
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return &OCIRuntime{
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root: root,
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runc: &runc.Runc{
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Root: filepath.Join(root, "runc"),
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},
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ios: make(map[string]OIO),
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}, nil
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}
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type OCIRuntime struct {
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root string
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runc *runc.Runc
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ios map[string]OIO // ios tracks created process io for cleanup purpose on delete
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}
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func (r *OCIRuntime) Create(ctx context.Context, id string, o execution.CreateOpts) (container *execution.Container, err error) {
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if o.Bundle == "" {
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return nil, errors.New("bundle path cannot be an empty string")
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}
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oio, err := newOIO(o.Stdin, o.Stdout, o.Stderr, o.Console)
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if err != nil {
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return nil, err
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}
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defer func() {
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if err != nil {
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oio.cleanup()
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}
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}()
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|
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if container, err = execution.NewContainer(r.root, id, o.Bundle); err != nil {
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return nil, err
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}
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defer func(c *execution.Container) {
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if err != nil {
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c.StateDir().Delete()
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}
|
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}(container)
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initStateDir, err := container.StateDir().NewProcess(initProcessID)
|
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if err != nil {
|
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return nil, err
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}
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pidFile := filepath.Join(initStateDir, PidFilename)
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err = r.runc.Create(ctx, id, o.Bundle, &runc.CreateOpts{
|
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PidFile: pidFile,
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Console: oio.console,
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IO: oio.rio,
|
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})
|
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if err != nil {
|
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return nil, err
|
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}
|
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defer func() {
|
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if err != nil {
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r.runc.Kill(ctx, id, int(syscall.SIGKILL))
|
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r.runc.Delete(ctx, id)
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}
|
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}()
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|
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process, err := newProcess(initProcessID, initStateDir, execution.Created)
|
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if err != nil {
|
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return nil, err
|
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}
|
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|
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container.AddProcess(process, true)
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|
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r.ios[id] = oio
|
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|
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return container, nil
|
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}
|
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|
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func (r *OCIRuntime) Start(ctx context.Context, c *execution.Container) error {
|
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return r.runc.Start(ctx, c.ID())
|
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}
|
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|
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func (r *OCIRuntime) Status(ctx context.Context, c *execution.Container) (execution.Status, error) {
|
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state, err := r.runc.State(ctx, c.ID())
|
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if err != nil {
|
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return "", err
|
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}
|
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return execution.Status(state.Status), nil
|
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}
|
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|
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func (r *OCIRuntime) load(runcC *runc.Container) (*execution.Container, error) {
|
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container := execution.LoadContainer(
|
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execution.StateDir(filepath.Join(r.root, runcC.ID)),
|
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runcC.ID,
|
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runcC.Bundle,
|
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execution.Status(runcC.Status),
|
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)
|
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|
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dirs, err := container.StateDir().Processes()
|
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if err != nil {
|
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return nil, err
|
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}
|
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for _, d := range dirs {
|
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process, err := newProcess(filepath.Base(d), d, execution.Running)
|
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if err != nil {
|
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return nil, err
|
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}
|
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container.AddProcess(process, process.Pid() == int64(runcC.Pid))
|
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}
|
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|
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return container, nil
|
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}
|
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|
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func (r *OCIRuntime) List(ctx context.Context) ([]*execution.Container, error) {
|
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runcCs, err := r.runc.List(ctx)
|
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if err != nil {
|
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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)
|
||||
}
|
||||
|
|
@ -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
|
||||
}
|
||||
|
|
@ -27,34 +27,37 @@ type newProcessOpts struct {
|
|||
runtimeArgs []string
|
||||
container *execution.Container
|
||||
exec bool
|
||||
stateDir string
|
||||
execution.StartProcessOpts
|
||||
}
|
||||
|
||||
func newProcess(ctx context.Context, o newProcessOpts) (*process, error) {
|
||||
procStateDir, err := o.container.StateDir().NewProcess(o.ID)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
func newProcess(ctx context.Context, o newProcessOpts) (p *process, err error) {
|
||||
p = &process{
|
||||
id: o.ID,
|
||||
stateDir: o.stateDir,
|
||||
exitChan: make(chan struct{}),
|
||||
ctx: ctx,
|
||||
}
|
||||
defer func() {
|
||||
if err != nil {
|
||||
o.container.StateDir().DeleteProcess(o.ID)
|
||||
p.cleanup()
|
||||
p = nil
|
||||
}
|
||||
}()
|
||||
|
||||
exitPipe, controlPipe, err := getControlPipes(procStateDir)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
if err = os.Mkdir(o.stateDir, 0700); err != nil {
|
||||
err = errors.Wrap(err, "failed to create process state dir")
|
||||
return
|
||||
}
|
||||
defer func() {
|
||||
if err != nil {
|
||||
exitPipe.Close()
|
||||
controlPipe.Close()
|
||||
}
|
||||
}()
|
||||
|
||||
cmd, err := newShim(o, procStateDir)
|
||||
p.exitPipe, p.controlPipe, err = getControlPipes(o.stateDir)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
return
|
||||
}
|
||||
|
||||
cmd, err := newShimProcess(o)
|
||||
if err != nil {
|
||||
return
|
||||
}
|
||||
defer func() {
|
||||
if err != nil {
|
||||
|
|
@ -75,70 +78,52 @@ func newProcess(ctx context.Context, o newProcessOpts) (*process, error) {
|
|||
close(abortCh)
|
||||
}()
|
||||
|
||||
process := &process{
|
||||
root: procStateDir,
|
||||
id: o.ID,
|
||||
exitChan: make(chan struct{}),
|
||||
exitPipe: exitPipe,
|
||||
controlPipe: controlPipe,
|
||||
}
|
||||
|
||||
pid, stime, status, err := waitForPid(ctx, abortCh, procStateDir)
|
||||
p.pid, p.startTime, p.status, err = waitUntilReady(ctx, abortCh, o.stateDir)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
return
|
||||
}
|
||||
process.pid = int64(pid)
|
||||
process.status = status
|
||||
process.startTime = stime
|
||||
|
||||
return process, nil
|
||||
return
|
||||
}
|
||||
|
||||
func loadProcess(root, id string) (*process, error) {
|
||||
pid, err := runc.ReadPidFile(filepath.Join(root, pidFilename))
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
|
||||
stime, err := ioutil.ReadFile(filepath.Join(root, startTimeFilename))
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
|
||||
path := filepath.Join(root, exitPipeFilename)
|
||||
exitPipe, err := os.OpenFile(path, syscall.O_RDONLY|syscall.O_NONBLOCK, 0)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
defer func() {
|
||||
if err != nil {
|
||||
exitPipe.Close()
|
||||
}
|
||||
}()
|
||||
|
||||
path = filepath.Join(root, controlPipeFilename)
|
||||
controlPipe, err := os.OpenFile(path, syscall.O_RDWR|syscall.O_NONBLOCK, 0)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
defer func() {
|
||||
if err != nil {
|
||||
controlPipe.Close()
|
||||
}
|
||||
}()
|
||||
|
||||
p := &process{
|
||||
root: root,
|
||||
func loadProcess(ctx context.Context, stateDir, id string) (p *process, err error) {
|
||||
p = &process{
|
||||
id: id,
|
||||
pid: int64(pid),
|
||||
stateDir: stateDir,
|
||||
exitChan: make(chan struct{}),
|
||||
exitPipe: exitPipe,
|
||||
controlPipe: controlPipe,
|
||||
startTime: string(stime),
|
||||
// TODO: status may need to be stored on disk to handle
|
||||
// Created state for init (i.e. a Start is needed to run the
|
||||
// container)
|
||||
status: execution.Running,
|
||||
ctx: ctx,
|
||||
}
|
||||
defer func() {
|
||||
if err != nil {
|
||||
p.cleanup()
|
||||
p = nil
|
||||
}
|
||||
}()
|
||||
|
||||
p.pid, err = getPidFromFile(filepath.Join(stateDir, pidFilename))
|
||||
if err != nil {
|
||||
err = errors.Wrap(err, "failed to read pid")
|
||||
return
|
||||
}
|
||||
|
||||
p.startTime, err = getStartTimeFromFile(filepath.Join(stateDir, startTimeFilename))
|
||||
if err != nil {
|
||||
return
|
||||
}
|
||||
|
||||
path := filepath.Join(stateDir, exitPipeFilename)
|
||||
p.exitPipe, err = os.OpenFile(path, syscall.O_RDONLY|syscall.O_NONBLOCK, 0)
|
||||
if err != nil {
|
||||
err = errors.Wrapf(err, "failed to open exit pipe")
|
||||
return
|
||||
}
|
||||
|
||||
path = filepath.Join(stateDir, controlPipeFilename)
|
||||
p.controlPipe, err = os.OpenFile(path, syscall.O_RDWR|syscall.O_NONBLOCK, 0)
|
||||
if err != nil {
|
||||
err = errors.Wrapf(err, "failed to open control pipe")
|
||||
return
|
||||
}
|
||||
|
||||
markAsStopped := func(p *process) (*process, error) {
|
||||
|
|
@ -146,30 +131,32 @@ func loadProcess(root, id string) (*process, error) {
|
|||
return p, nil
|
||||
}
|
||||
|
||||
if err = syscall.Kill(pid, 0); err != nil {
|
||||
if err = syscall.Kill(int(p.pid), 0); err != nil {
|
||||
if err == syscall.ESRCH {
|
||||
return markAsStopped(p)
|
||||
}
|
||||
return nil, err
|
||||
err = errors.Wrapf(err, "failed to check if process is still alive")
|
||||
return
|
||||
}
|
||||
|
||||
cstime, err := starttime.GetProcessStartTime(pid)
|
||||
cstime, err := starttime.GetProcessStartTime(int(p.pid))
|
||||
if err != nil {
|
||||
if os.IsNotExist(err) {
|
||||
return markAsStopped(p)
|
||||
}
|
||||
return nil, err
|
||||
err = errors.Wrapf(err, "failed retrieve current process start time")
|
||||
return
|
||||
}
|
||||
|
||||
if p.startTime != cstime {
|
||||
return markAsStopped(p)
|
||||
}
|
||||
|
||||
return p, nil
|
||||
return
|
||||
}
|
||||
|
||||
type process struct {
|
||||
root string
|
||||
stateDir string
|
||||
id string
|
||||
pid int64
|
||||
exitChan chan struct{}
|
||||
|
|
@ -211,7 +198,7 @@ func (p *process) Wait() (uint32, error) {
|
|||
return uint32(128 + int(syscall.SIGKILL)), nil
|
||||
}
|
||||
|
||||
data, err := ioutil.ReadFile(filepath.Join(p.root, exitStatusFilename))
|
||||
data, err := ioutil.ReadFile(filepath.Join(p.stateDir, exitStatusFilename))
|
||||
if err != nil {
|
||||
return execution.UnknownStatusCode, errors.Wrap(err, "failed to read process exit status")
|
||||
}
|
||||
|
|
@ -278,7 +265,19 @@ func (p *process) isAlive() bool {
|
|||
return true
|
||||
}
|
||||
|
||||
func waitForPid(ctx context.Context, abortCh chan syscall.WaitStatus, root string) (pid int, stime string, status execution.Status, err error) {
|
||||
func (p *process) cleanup() {
|
||||
for _, f := range []*os.File{p.exitPipe, p.controlPipe} {
|
||||
if f != nil {
|
||||
f.Close()
|
||||
}
|
||||
}
|
||||
|
||||
if err := os.RemoveAll(p.stateDir); err != nil {
|
||||
log.G(p.ctx).Warnf("failed to remove process state dir: %v", err)
|
||||
}
|
||||
}
|
||||
|
||||
func waitUntilReady(ctx context.Context, abortCh chan syscall.WaitStatus, root string) (pid int64, stime string, status execution.Status, err error) {
|
||||
status = execution.Unknown
|
||||
for {
|
||||
select {
|
||||
|
|
@ -293,7 +292,7 @@ func waitForPid(ctx context.Context, abortCh chan syscall.WaitStatus, root strin
|
|||
return
|
||||
default:
|
||||
}
|
||||
pid, err = runc.ReadPidFile(filepath.Join(root, pidFilename))
|
||||
pid, err = getPidFromFile(filepath.Join(root, pidFilename))
|
||||
if err == nil {
|
||||
break
|
||||
} else if !os.IsNotExist(err) {
|
||||
|
|
@ -301,7 +300,7 @@ func waitForPid(ctx context.Context, abortCh chan syscall.WaitStatus, root strin
|
|||
}
|
||||
}
|
||||
status = execution.Created
|
||||
stime, err = starttime.GetProcessStartTime(pid)
|
||||
stime, err = starttime.GetProcessStartTime(int(pid))
|
||||
switch {
|
||||
case os.IsNotExist(err):
|
||||
status = execution.Stopped
|
||||
|
|
@ -328,9 +327,9 @@ func waitForPid(ctx context.Context, abortCh chan syscall.WaitStatus, root strin
|
|||
return pid, stime, status, nil
|
||||
}
|
||||
|
||||
func newShim(o newProcessOpts, workDir string) (*exec.Cmd, error) {
|
||||
func newShimProcess(o newProcessOpts) (*exec.Cmd, error) {
|
||||
cmd := exec.Command(o.shimBinary, o.container.ID(), o.container.Bundle(), o.runtime)
|
||||
cmd.Dir = workDir
|
||||
cmd.Dir = o.stateDir
|
||||
cmd.SysProcAttr = &syscall.SysProcAttr{
|
||||
Setpgid: true,
|
||||
}
|
||||
|
|
@ -348,12 +347,11 @@ func newShim(o newProcessOpts, workDir string) (*exec.Cmd, error) {
|
|||
RootGID: int(o.Spec.User.GID),
|
||||
}
|
||||
|
||||
f, err := os.Create(filepath.Join(workDir, "process.json"))
|
||||
f, err := os.Create(filepath.Join(o.stateDir, "process.json"))
|
||||
if err != nil {
|
||||
return nil, errors.Wrapf(err, "failed to create shim's process.json for container %s", o.container.ID())
|
||||
}
|
||||
defer f.Close()
|
||||
|
||||
if err := json.NewEncoder(f).Encode(state); err != nil {
|
||||
return nil, errors.Wrapf(err, "failed to create shim's processState for container %s", o.container.ID())
|
||||
}
|
||||
|
|
@ -368,19 +366,39 @@ func newShim(o newProcessOpts, workDir string) (*exec.Cmd, error) {
|
|||
func getControlPipes(root string) (exitPipe *os.File, controlPipe *os.File, err error) {
|
||||
path := filepath.Join(root, exitPipeFilename)
|
||||
if err = unix.Mkfifo(path, 0700); err != nil {
|
||||
return exitPipe, controlPipe, errors.Wrap(err, "failed to create shim exit fifo")
|
||||
err = errors.Wrap(err, "failed to create shim exit fifo")
|
||||
return
|
||||
}
|
||||
if exitPipe, err = os.OpenFile(path, syscall.O_RDONLY|syscall.O_NONBLOCK, 0); err != nil {
|
||||
return exitPipe, controlPipe, errors.Wrap(err, "failed to open shim exit fifo")
|
||||
err = errors.Wrap(err, "failed to open shim exit fifo")
|
||||
return
|
||||
}
|
||||
|
||||
path = filepath.Join(root, controlPipeFilename)
|
||||
if err = unix.Mkfifo(path, 0700); err != nil {
|
||||
return exitPipe, controlPipe, errors.Wrap(err, "failed to create shim control fifo")
|
||||
err = errors.Wrap(err, "failed to create shim control fifo")
|
||||
return
|
||||
}
|
||||
if controlPipe, err = os.OpenFile(path, syscall.O_RDWR|syscall.O_NONBLOCK, 0); err != nil {
|
||||
return exitPipe, controlPipe, errors.Wrap(err, "failed to open shim control fifo")
|
||||
err = errors.Wrap(err, "failed to open shim control fifo")
|
||||
return
|
||||
}
|
||||
|
||||
return exitPipe, controlPipe, nil
|
||||
return
|
||||
}
|
||||
|
||||
func getPidFromFile(path string) (int64, error) {
|
||||
pid, err := runc.ReadPidFile(path)
|
||||
if err != nil {
|
||||
return -1, err
|
||||
}
|
||||
return int64(pid), nil
|
||||
}
|
||||
|
||||
func getStartTimeFromFile(path string) (string, error) {
|
||||
stime, err := ioutil.ReadFile(path)
|
||||
if err != nil {
|
||||
return "", errors.Wrapf(err, "failed to read start time")
|
||||
}
|
||||
return string(stime), nil
|
||||
}
|
||||
|
|
|
|||
|
|
@ -1,6 +1,7 @@
|
|||
package shim
|
||||
|
||||
import (
|
||||
"bytes"
|
||||
"context"
|
||||
"encoding/json"
|
||||
"io/ioutil"
|
||||
|
|
@ -24,7 +25,6 @@ const (
|
|||
startTimeFilename = "starttime"
|
||||
exitPipeFilename = "exit"
|
||||
controlPipeFilename = "control"
|
||||
initProcessID = "init"
|
||||
exitStatusFilename = "exitStatus"
|
||||
)
|
||||
|
||||
|
|
@ -93,21 +93,17 @@ func (s *ShimRuntime) Create(ctx context.Context, id string, o execution.CreateO
|
|||
return nil, execution.ErrContainerExists
|
||||
}
|
||||
|
||||
container, err := execution.NewContainer(s.root, id, o.Bundle)
|
||||
containerCtx := log.WithModule(log.WithModule(ctx, "container"), id)
|
||||
container, err := execution.NewContainer(containerCtx, filepath.Join(s.root, id), id, o.Bundle)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
defer func() {
|
||||
if err != nil {
|
||||
container.StateDir().Delete()
|
||||
container.Cleanup()
|
||||
}
|
||||
}()
|
||||
|
||||
err = ioutil.WriteFile(filepath.Join(string(container.StateDir()), "bundle"), []byte(o.Bundle), 0600)
|
||||
if err != nil {
|
||||
return nil, errors.Wrap(err, "failed to save bundle path to disk")
|
||||
}
|
||||
|
||||
// extract Process spec from bundle's config.json
|
||||
var spec specs.Spec
|
||||
f, err := os.Open(filepath.Join(o.Bundle, "config.json"))
|
||||
|
|
@ -125,8 +121,9 @@ func (s *ShimRuntime) Create(ctx context.Context, id string, o execution.CreateO
|
|||
runtimeArgs: s.runtimeArgs,
|
||||
container: container,
|
||||
exec: false,
|
||||
stateDir: container.ProcessStateDir(execution.InitProcessID),
|
||||
StartProcessOpts: execution.StartProcessOpts{
|
||||
ID: initProcessID,
|
||||
ID: execution.InitProcessID,
|
||||
Spec: spec.Process,
|
||||
Console: o.Console,
|
||||
Stdin: o.Stdin,
|
||||
|
|
@ -135,14 +132,14 @@ func (s *ShimRuntime) Create(ctx context.Context, id string, o execution.CreateO
|
|||
},
|
||||
}
|
||||
|
||||
process, err := newProcess(ctx, processOpts)
|
||||
processCtx := log.WithModule(log.WithModule(containerCtx, "process"), execution.InitProcessID)
|
||||
process, err := newProcess(processCtx, processOpts)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
process.ctx = log.WithModule(log.WithModule(s.ctx, "container"), id)
|
||||
|
||||
s.monitorProcess(process)
|
||||
container.AddProcess(process, true)
|
||||
container.AddProcess(process)
|
||||
|
||||
s.addContainer(container)
|
||||
|
||||
|
|
@ -194,7 +191,7 @@ func (s *ShimRuntime) Delete(ctx context.Context, c *execution.Container) error
|
|||
return errors.Errorf("cannot delete a container in the '%s' state", c.Status())
|
||||
}
|
||||
|
||||
c.StateDir().Delete()
|
||||
c.Cleanup()
|
||||
s.removeContainer(c)
|
||||
return nil
|
||||
}
|
||||
|
|
@ -232,7 +229,9 @@ func (s *ShimRuntime) StartProcess(ctx context.Context, c *execution.Container,
|
|||
exec: true,
|
||||
StartProcessOpts: o,
|
||||
}
|
||||
process, err := newProcess(ctx, processOpts)
|
||||
|
||||
processCtx := log.WithModule(log.WithModule(c.Context(), "process"), execution.InitProcessID)
|
||||
process, err := newProcess(processCtx, processOpts)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
|
|
@ -240,7 +239,7 @@ func (s *ShimRuntime) StartProcess(ctx context.Context, c *execution.Container,
|
|||
process.status = execution.Running
|
||||
s.monitorProcess(process)
|
||||
|
||||
c.AddProcess(process, false)
|
||||
c.AddProcess(process)
|
||||
return process, nil
|
||||
}
|
||||
|
||||
|
|
@ -250,11 +249,11 @@ func (s *ShimRuntime) SignalProcess(ctx context.Context, c *execution.Container,
|
|||
|
||||
process := c.GetProcess(id)
|
||||
if process == nil {
|
||||
return errors.Errorf("no such process %s", id)
|
||||
return errors.Errorf("container %s has no process named %s", c.ID(), id)
|
||||
}
|
||||
err := syscall.Kill(int(process.Pid()), sig.(syscall.Signal))
|
||||
if err != nil {
|
||||
return errors.Wrapf(err, "failed to send %v signal to process %v", sig, process.Pid())
|
||||
return errors.Wrapf(err, "failed to send %v signal to container %s process %v", sig, c.ID(), process.Pid())
|
||||
}
|
||||
return err
|
||||
}
|
||||
|
|
@ -263,13 +262,14 @@ func (s *ShimRuntime) DeleteProcess(ctx context.Context, c *execution.Container,
|
|||
log.G(s.ctx).WithFields(logrus.Fields{"container": c, "process-id": id}).
|
||||
Debug("DeleteProcess()")
|
||||
|
||||
c.RemoveProcess(id)
|
||||
return c.StateDir().DeleteProcess(id)
|
||||
}
|
||||
if p := c.GetProcess(id); p != nil {
|
||||
p.(*process).cleanup()
|
||||
|
||||
//
|
||||
//
|
||||
//
|
||||
return c.RemoveProcess(id)
|
||||
}
|
||||
|
||||
return errors.Errorf("container %s has no process named %s", c.ID(), id)
|
||||
}
|
||||
|
||||
func (s *ShimRuntime) monitor() {
|
||||
var events [128]syscall.EpollEvent
|
||||
|
|
@ -375,46 +375,56 @@ func (s *ShimRuntime) loadContainers() {
|
|||
continue
|
||||
}
|
||||
|
||||
stateDir, err := execution.LoadStateDir(s.root, c.Name())
|
||||
stateDir := filepath.Join(s.root, c.Name())
|
||||
containerCtx := log.WithModule(log.WithModule(s.ctx, "container"), c.Name())
|
||||
container, err := execution.LoadContainer(containerCtx, stateDir, c.Name())
|
||||
if err != nil {
|
||||
// We should never fail the above call unless someone
|
||||
// delete the directory while we're loading
|
||||
log.G(s.ctx).WithFields(logrus.Fields{"container": c.Name(), "statedir": s.root}).
|
||||
Warn("failed to load container statedir:", err)
|
||||
continue
|
||||
}
|
||||
bundle, err := ioutil.ReadFile(filepath.Join(string(stateDir), "bundle"))
|
||||
if err != nil {
|
||||
log.G(s.ctx).WithField("container", c.Name()).
|
||||
Warn("failed to load container bundle path:", err)
|
||||
log.G(s.ctx).WithField("container-id", c.Name()).Warn(err)
|
||||
continue
|
||||
}
|
||||
|
||||
container := execution.LoadContainer(stateDir, c.Name(), string(bundle), execution.Unknown)
|
||||
s.addContainer(container)
|
||||
|
||||
processDirs, err := stateDir.Processes()
|
||||
processDirs, err := container.ProcessesStateDir()
|
||||
if err != nil {
|
||||
log.G(s.ctx).WithField("container", c.Name()).
|
||||
Warn("failed to retrieve container processes:", err)
|
||||
log.G(s.ctx).WithField("container-id", c.Name()).Warn(err)
|
||||
continue
|
||||
}
|
||||
|
||||
for _, procStateRoot := range processDirs {
|
||||
id := filepath.Base(procStateRoot)
|
||||
proc, err := loadProcess(procStateRoot, id)
|
||||
for processID, processStateDir := range processDirs {
|
||||
processCtx := log.WithModule(log.WithModule(containerCtx, "process"), processID)
|
||||
var p *process
|
||||
p, err = loadProcess(processCtx, processStateDir, processID)
|
||||
if err != nil {
|
||||
log.G(s.ctx).WithFields(logrus.Fields{"container": c.Name(), "process": id}).
|
||||
Warn("failed to load process:", err)
|
||||
s.removeContainer(container)
|
||||
for _, p := range container.Processes() {
|
||||
s.unmonitorProcess(p.(*process))
|
||||
}
|
||||
log.G(s.ctx).WithFields(logrus.Fields{"container-id": c.Name(), "process": processID}).Warn(err)
|
||||
break
|
||||
}
|
||||
proc.ctx = log.WithModule(log.WithModule(s.ctx, "container"), container.ID())
|
||||
container.AddProcess(proc, proc.ID() == initProcessID)
|
||||
s.monitorProcess(proc)
|
||||
if processID == execution.InitProcessID && p.status == execution.Running {
|
||||
p.status = s.loadContainerStatus(container.ID())
|
||||
}
|
||||
container.AddProcess(p)
|
||||
}
|
||||
|
||||
// if successfull, add the container to our list
|
||||
if err == nil {
|
||||
for _, p := range container.Processes() {
|
||||
s.monitorProcess(p.(*process))
|
||||
}
|
||||
s.addContainer(container)
|
||||
log.G(s.ctx).Infof("restored container %s", container.ID())
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
func (s *ShimRuntime) loadContainerStatus(id string) execution.Status {
|
||||
cmd := exec.Command(s.runtime, append(s.runtimeArgs, "state", id)...)
|
||||
out, err := cmd.CombinedOutput()
|
||||
if err != nil {
|
||||
return execution.Unknown
|
||||
}
|
||||
|
||||
var st struct{ Status string }
|
||||
if err := json.NewDecoder(bytes.NewReader(out)).Decode(&st); err != nil {
|
||||
return execution.Unknown
|
||||
}
|
||||
|
||||
return execution.Status(st.Status)
|
||||
}
|
||||
|
|
|
|||
|
|
@ -1,82 +0,0 @@
|
|||
package execution
|
||||
|
||||
import (
|
||||
"io/ioutil"
|
||||
"os"
|
||||
"path/filepath"
|
||||
|
||||
"github.com/pkg/errors"
|
||||
)
|
||||
|
||||
const processesDirName = "processes"
|
||||
|
||||
type StateDir string
|
||||
|
||||
func LoadStateDir(root, id string) (StateDir, error) {
|
||||
path := filepath.Join(root, id)
|
||||
if _, err := os.Stat(path); err != nil {
|
||||
return "", errors.Wrap(err, "could not find container statedir")
|
||||
}
|
||||
return StateDir(path), nil
|
||||
}
|
||||
|
||||
func NewStateDir(root, id string) (StateDir, error) {
|
||||
path := filepath.Join(root, id)
|
||||
if err := os.Mkdir(path, 0700); err != nil {
|
||||
return "", errors.Wrap(err, "could not create container statedir")
|
||||
}
|
||||
if err := os.Mkdir(StateDir(path).processesDir(), 0700); err != nil {
|
||||
os.RemoveAll(path)
|
||||
return "", errors.Wrap(err, "could not create processes statedir")
|
||||
}
|
||||
return StateDir(path), nil
|
||||
}
|
||||
|
||||
func (s StateDir) Delete() error {
|
||||
err := os.RemoveAll(string(s))
|
||||
if err != nil {
|
||||
return errors.Wrapf(err, "failed to remove statedir %s", string(s))
|
||||
}
|
||||
return nil
|
||||
}
|
||||
|
||||
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 "", errors.Wrap(err, "could not create process statedir")
|
||||
}
|
||||
|
||||
return dir, nil
|
||||
}
|
||||
|
||||
func (s StateDir) ProcessDir(id string) string {
|
||||
return filepath.Join(s.processesDir(), id)
|
||||
}
|
||||
|
||||
func (s StateDir) DeleteProcess(id string) error {
|
||||
err := os.RemoveAll(filepath.Join(s.processesDir(), id))
|
||||
if err != nil {
|
||||
return errors.Wrapf(err, "failed to remove process %d statedir", id)
|
||||
}
|
||||
return nil
|
||||
}
|
||||
|
||||
func (s StateDir) Processes() ([]string, error) {
|
||||
procsDir := s.processesDir()
|
||||
dirs, err := ioutil.ReadDir(procsDir)
|
||||
if err != nil {
|
||||
return nil, errors.Wrap(err, "could not list processes statedir")
|
||||
}
|
||||
|
||||
paths := make([]string, 0)
|
||||
for _, d := range dirs {
|
||||
if d.IsDir() {
|
||||
paths = append(paths, filepath.Join(procsDir, d.Name()))
|
||||
}
|
||||
}
|
||||
return paths, nil
|
||||
}
|
||||
|
||||
func (s StateDir) processesDir() string {
|
||||
return filepath.Join(string(s), processesDirName)
|
||||
}
|
||||
|
|
@ -5,6 +5,7 @@ type Status string
|
|||
const (
|
||||
Created Status = "created"
|
||||
Paused Status = "paused"
|
||||
Pausing Status = "pausing"
|
||||
Running Status = "running"
|
||||
Stopped Status = "stopped"
|
||||
Deleted Status = "deleted"
|
||||
|
|
|
|||
Loading…
Reference in a new issue