mirror of
https://github.com/moby/moby.git
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c030885e7a
Trying to start a container that is already running is not an error condition, so a `304 Not Modified` should be returned instead of a `409 Conflict`. Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
1432 lines
46 KiB
Go
1432 lines
46 KiB
Go
package local // import "github.com/docker/docker/libcontainerd/local"
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// This package contains the legacy in-proc calls in HCS using the v1 schema
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// for Windows runtime purposes.
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import (
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"context"
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"encoding/json"
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"fmt"
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"io/ioutil"
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"os"
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"path"
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"path/filepath"
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"regexp"
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"strings"
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"sync"
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"syscall"
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"time"
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"github.com/Microsoft/hcsshim"
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opengcs "github.com/Microsoft/opengcs/client"
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"github.com/containerd/containerd"
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"github.com/containerd/containerd/cio"
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"github.com/docker/docker/errdefs"
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"github.com/docker/docker/libcontainerd/queue"
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libcontainerdtypes "github.com/docker/docker/libcontainerd/types"
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"github.com/docker/docker/pkg/sysinfo"
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"github.com/docker/docker/pkg/system"
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specs "github.com/opencontainers/runtime-spec/specs-go"
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"github.com/pkg/errors"
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"github.com/sirupsen/logrus"
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"golang.org/x/sys/windows"
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)
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type process struct {
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id string
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pid int
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hcsProcess hcsshim.Process
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}
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type container struct {
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sync.Mutex
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// The ociSpec is required, as client.Create() needs a spec, but can
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// be called from the RestartManager context which does not otherwise
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// have access to the Spec
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ociSpec *specs.Spec
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isWindows bool
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hcsContainer hcsshim.Container
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id string
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status containerd.ProcessStatus
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exitedAt time.Time
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exitCode uint32
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waitCh chan struct{}
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init *process
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execs map[string]*process
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terminateInvoked bool
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}
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// Win32 error codes that are used for various workarounds
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// These really should be ALL_CAPS to match golangs syscall library and standard
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// Win32 error conventions, but golint insists on CamelCase.
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const (
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CoEClassstring = syscall.Errno(0x800401F3) // Invalid class string
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ErrorNoNetwork = syscall.Errno(1222) // The network is not present or not started
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ErrorBadPathname = syscall.Errno(161) // The specified path is invalid
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ErrorInvalidObject = syscall.Errno(0x800710D8) // The object identifier does not represent a valid object
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)
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// defaultOwner is a tag passed to HCS to allow it to differentiate between
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// container creator management stacks. We hard code "docker" in the case
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// of docker.
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const defaultOwner = "docker"
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type client struct {
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sync.Mutex
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stateDir string
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backend libcontainerdtypes.Backend
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logger *logrus.Entry
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eventQ queue.Queue
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containers map[string]*container
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}
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// NewClient creates a new local executor for windows
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func NewClient(ctx context.Context, cli *containerd.Client, stateDir, ns string, b libcontainerdtypes.Backend) (libcontainerdtypes.Client, error) {
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c := &client{
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stateDir: stateDir,
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backend: b,
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logger: logrus.WithField("module", "libcontainerd").WithField("module", "libcontainerd").WithField("namespace", ns),
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containers: make(map[string]*container),
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}
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return c, nil
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}
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func (c *client) Version(ctx context.Context) (containerd.Version, error) {
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return containerd.Version{}, errors.New("not implemented on Windows")
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}
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// Create is the entrypoint to create a container from a spec.
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// Table below shows the fields required for HCS JSON calling parameters,
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// where if not populated, is omitted.
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// +-----------------+--------------------------------------------+---------------------------------------------------+
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// | | Isolation=Process | Isolation=Hyper-V |
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// +-----------------+--------------------------------------------+---------------------------------------------------+
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// | VolumePath | \\?\\Volume{GUIDa} | |
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// | LayerFolderPath | %root%\windowsfilter\containerID | |
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// | Layers[] | ID=GUIDb;Path=%root%\windowsfilter\layerID | ID=GUIDb;Path=%root%\windowsfilter\layerID |
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// | HvRuntime | | ImagePath=%root%\BaseLayerID\UtilityVM |
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// +-----------------+--------------------------------------------+---------------------------------------------------+
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//
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// Isolation=Process example:
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//
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// {
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// "SystemType": "Container",
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// "Name": "5e0055c814a6005b8e57ac59f9a522066e0af12b48b3c26a9416e23907698776",
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// "Owner": "docker",
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// "VolumePath": "\\\\\\\\?\\\\Volume{66d1ef4c-7a00-11e6-8948-00155ddbef9d}",
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// "IgnoreFlushesDuringBoot": true,
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// "LayerFolderPath": "C:\\\\control\\\\windowsfilter\\\\5e0055c814a6005b8e57ac59f9a522066e0af12b48b3c26a9416e23907698776",
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// "Layers": [{
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// "ID": "18955d65-d45a-557b-bf1c-49d6dfefc526",
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// "Path": "C:\\\\control\\\\windowsfilter\\\\65bf96e5760a09edf1790cb229e2dfb2dbd0fcdc0bf7451bae099106bfbfea0c"
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// }],
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// "HostName": "5e0055c814a6",
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// "MappedDirectories": [],
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// "HvPartition": false,
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// "EndpointList": ["eef2649d-bb17-4d53-9937-295a8efe6f2c"],
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//}
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//
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// Isolation=Hyper-V example:
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//
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//{
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// "SystemType": "Container",
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// "Name": "475c2c58933b72687a88a441e7e0ca4bd72d76413c5f9d5031fee83b98f6045d",
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// "Owner": "docker",
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// "IgnoreFlushesDuringBoot": true,
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// "Layers": [{
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// "ID": "18955d65-d45a-557b-bf1c-49d6dfefc526",
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// "Path": "C:\\\\control\\\\windowsfilter\\\\65bf96e5760a09edf1790cb229e2dfb2dbd0fcdc0bf7451bae099106bfbfea0c"
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// }],
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// "HostName": "475c2c58933b",
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// "MappedDirectories": [],
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// "HvPartition": true,
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// "EndpointList": ["e1bb1e61-d56f-405e-b75d-fd520cefa0cb"],
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// "DNSSearchList": "a.com,b.com,c.com",
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// "HvRuntime": {
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// "ImagePath": "C:\\\\control\\\\windowsfilter\\\\65bf96e5760a09edf1790cb229e2dfb2dbd0fcdc0bf7451bae099106bfbfea0c\\\\UtilityVM"
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// },
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//}
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func (c *client) Create(_ context.Context, id string, spec *specs.Spec, runtimeOptions interface{}) error {
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if ctr := c.getContainer(id); ctr != nil {
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return errors.WithStack(errdefs.Conflict(errors.New("id already in use")))
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}
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var err error
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if spec.Linux == nil {
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err = c.createWindows(id, spec, runtimeOptions)
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} else {
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err = c.createLinux(id, spec, runtimeOptions)
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}
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if err == nil {
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c.eventQ.Append(id, func() {
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ei := libcontainerdtypes.EventInfo{
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ContainerID: id,
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}
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c.logger.WithFields(logrus.Fields{
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"container": id,
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"event": libcontainerdtypes.EventCreate,
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}).Info("sending event")
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err := c.backend.ProcessEvent(id, libcontainerdtypes.EventCreate, ei)
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if err != nil {
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c.logger.WithError(err).WithFields(logrus.Fields{
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"container": id,
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"event": libcontainerdtypes.EventCreate,
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}).Error("failed to process event")
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}
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})
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}
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return err
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}
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func (c *client) createWindows(id string, spec *specs.Spec, runtimeOptions interface{}) error {
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logger := c.logger.WithField("container", id)
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configuration := &hcsshim.ContainerConfig{
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SystemType: "Container",
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Name: id,
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Owner: defaultOwner,
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IgnoreFlushesDuringBoot: spec.Windows.IgnoreFlushesDuringBoot,
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HostName: spec.Hostname,
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HvPartition: false,
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}
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c.extractResourcesFromSpec(spec, configuration)
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if spec.Windows.Resources != nil {
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if spec.Windows.Resources.Storage != nil {
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if spec.Windows.Resources.Storage.Bps != nil {
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configuration.StorageBandwidthMaximum = *spec.Windows.Resources.Storage.Bps
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}
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if spec.Windows.Resources.Storage.Iops != nil {
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configuration.StorageIOPSMaximum = *spec.Windows.Resources.Storage.Iops
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}
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}
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}
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if spec.Windows.HyperV != nil {
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configuration.HvPartition = true
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}
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if spec.Windows.Network != nil {
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configuration.EndpointList = spec.Windows.Network.EndpointList
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configuration.AllowUnqualifiedDNSQuery = spec.Windows.Network.AllowUnqualifiedDNSQuery
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if spec.Windows.Network.DNSSearchList != nil {
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configuration.DNSSearchList = strings.Join(spec.Windows.Network.DNSSearchList, ",")
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}
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configuration.NetworkSharedContainerName = spec.Windows.Network.NetworkSharedContainerName
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}
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if cs, ok := spec.Windows.CredentialSpec.(string); ok {
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configuration.Credentials = cs
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}
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// We must have least two layers in the spec, the bottom one being a
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// base image, the top one being the RW layer.
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if spec.Windows.LayerFolders == nil || len(spec.Windows.LayerFolders) < 2 {
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return fmt.Errorf("OCI spec is invalid - at least two LayerFolders must be supplied to the runtime")
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}
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// Strip off the top-most layer as that's passed in separately to HCS
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configuration.LayerFolderPath = spec.Windows.LayerFolders[len(spec.Windows.LayerFolders)-1]
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layerFolders := spec.Windows.LayerFolders[:len(spec.Windows.LayerFolders)-1]
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if configuration.HvPartition {
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// We don't currently support setting the utility VM image explicitly.
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// TODO @swernli/jhowardmsft circa RS5, this may be re-locatable.
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if spec.Windows.HyperV.UtilityVMPath != "" {
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return errors.New("runtime does not support an explicit utility VM path for Hyper-V containers")
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}
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// Find the upper-most utility VM image.
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var uvmImagePath string
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for _, path := range layerFolders {
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fullPath := filepath.Join(path, "UtilityVM")
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_, err := os.Stat(fullPath)
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if err == nil {
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uvmImagePath = fullPath
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break
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}
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if !os.IsNotExist(err) {
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return err
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}
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}
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if uvmImagePath == "" {
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return errors.New("utility VM image could not be found")
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}
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configuration.HvRuntime = &hcsshim.HvRuntime{ImagePath: uvmImagePath}
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if spec.Root.Path != "" {
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return errors.New("OCI spec is invalid - Root.Path must be omitted for a Hyper-V container")
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}
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} else {
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const volumeGUIDRegex = `^\\\\\?\\(Volume)\{{0,1}[0-9a-fA-F]{8}\-[0-9a-fA-F]{4}\-[0-9a-fA-F]{4}\-[0-9a-fA-F]{4}\-[0-9a-fA-F]{12}(\}){0,1}\}\\$`
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if _, err := regexp.MatchString(volumeGUIDRegex, spec.Root.Path); err != nil {
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return fmt.Errorf(`OCI spec is invalid - Root.Path '%s' must be a volume GUID path in the format '\\?\Volume{GUID}\'`, spec.Root.Path)
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}
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// HCS API requires the trailing backslash to be removed
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configuration.VolumePath = spec.Root.Path[:len(spec.Root.Path)-1]
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}
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if spec.Root.Readonly {
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return errors.New(`OCI spec is invalid - Root.Readonly must not be set on Windows`)
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}
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for _, layerPath := range layerFolders {
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_, filename := filepath.Split(layerPath)
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g, err := hcsshim.NameToGuid(filename)
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if err != nil {
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return err
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}
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configuration.Layers = append(configuration.Layers, hcsshim.Layer{
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ID: g.ToString(),
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Path: layerPath,
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})
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}
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// Add the mounts (volumes, bind mounts etc) to the structure
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var mds []hcsshim.MappedDir
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var mps []hcsshim.MappedPipe
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for _, mount := range spec.Mounts {
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const pipePrefix = `\\.\pipe\`
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if mount.Type != "" {
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return fmt.Errorf("OCI spec is invalid - Mount.Type '%s' must not be set", mount.Type)
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}
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if strings.HasPrefix(mount.Destination, pipePrefix) {
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mp := hcsshim.MappedPipe{
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HostPath: mount.Source,
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ContainerPipeName: mount.Destination[len(pipePrefix):],
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}
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mps = append(mps, mp)
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} else {
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md := hcsshim.MappedDir{
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HostPath: mount.Source,
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ContainerPath: mount.Destination,
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ReadOnly: false,
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}
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for _, o := range mount.Options {
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if strings.ToLower(o) == "ro" {
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md.ReadOnly = true
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}
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}
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mds = append(mds, md)
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}
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}
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configuration.MappedDirectories = mds
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if len(mps) > 0 && system.GetOSVersion().Build < 16299 { // RS3
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return errors.New("named pipe mounts are not supported on this version of Windows")
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}
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configuration.MappedPipes = mps
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if len(spec.Windows.Devices) > 0 {
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// Add any device assignments
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if configuration.HvPartition {
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return errors.New("device assignment is not supported for HyperV containers")
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}
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if system.GetOSVersion().Build < 17763 { // RS5
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return errors.New("device assignment requires Windows builds RS5 (17763+) or later")
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}
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for _, d := range spec.Windows.Devices {
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configuration.AssignedDevices = append(configuration.AssignedDevices, hcsshim.AssignedDevice{InterfaceClassGUID: d.ID})
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}
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}
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hcsContainer, err := hcsshim.CreateContainer(id, configuration)
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if err != nil {
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return err
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}
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// Construct a container object for calling start on it.
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ctr := &container{
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id: id,
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execs: make(map[string]*process),
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isWindows: true,
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ociSpec: spec,
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hcsContainer: hcsContainer,
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status: containerd.Created,
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waitCh: make(chan struct{}),
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}
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logger.Debug("starting container")
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if err = hcsContainer.Start(); err != nil {
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c.logger.WithError(err).Error("failed to start container")
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ctr.Lock()
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if err := c.terminateContainer(ctr); err != nil {
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c.logger.WithError(err).Error("failed to cleanup after a failed Start")
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} else {
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c.logger.Debug("cleaned up after failed Start by calling Terminate")
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}
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ctr.Unlock()
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return err
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}
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c.Lock()
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c.containers[id] = ctr
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c.Unlock()
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logger.Debug("createWindows() completed successfully")
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return nil
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}
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func (c *client) createLinux(id string, spec *specs.Spec, runtimeOptions interface{}) error {
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logrus.Debugf("libcontainerd: createLinux(): containerId %s ", id)
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logger := c.logger.WithField("container", id)
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if runtimeOptions == nil {
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return fmt.Errorf("lcow option must be supplied to the runtime")
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}
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lcowConfig, ok := runtimeOptions.(*opengcs.Config)
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if !ok {
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return fmt.Errorf("lcow option must be supplied to the runtime")
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}
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configuration := &hcsshim.ContainerConfig{
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HvPartition: true,
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Name: id,
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SystemType: "container",
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ContainerType: "linux",
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Owner: defaultOwner,
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TerminateOnLastHandleClosed: true,
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HvRuntime: &hcsshim.HvRuntime{
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ImagePath: lcowConfig.KirdPath,
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LinuxKernelFile: lcowConfig.KernelFile,
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LinuxInitrdFile: lcowConfig.InitrdFile,
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LinuxBootParameters: lcowConfig.BootParameters,
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},
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}
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if spec.Windows == nil {
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return fmt.Errorf("spec.Windows must not be nil for LCOW containers")
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}
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c.extractResourcesFromSpec(spec, configuration)
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// We must have least one layer in the spec
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if spec.Windows.LayerFolders == nil || len(spec.Windows.LayerFolders) == 0 {
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return fmt.Errorf("OCI spec is invalid - at least one LayerFolders must be supplied to the runtime")
|
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}
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// Strip off the top-most layer as that's passed in separately to HCS
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configuration.LayerFolderPath = spec.Windows.LayerFolders[len(spec.Windows.LayerFolders)-1]
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layerFolders := spec.Windows.LayerFolders[:len(spec.Windows.LayerFolders)-1]
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|
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for _, layerPath := range layerFolders {
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_, filename := filepath.Split(layerPath)
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g, err := hcsshim.NameToGuid(filename)
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if err != nil {
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return err
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}
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configuration.Layers = append(configuration.Layers, hcsshim.Layer{
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ID: g.ToString(),
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Path: filepath.Join(layerPath, "layer.vhd"),
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})
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}
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if spec.Windows.Network != nil {
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configuration.EndpointList = spec.Windows.Network.EndpointList
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configuration.AllowUnqualifiedDNSQuery = spec.Windows.Network.AllowUnqualifiedDNSQuery
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if spec.Windows.Network.DNSSearchList != nil {
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configuration.DNSSearchList = strings.Join(spec.Windows.Network.DNSSearchList, ",")
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}
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configuration.NetworkSharedContainerName = spec.Windows.Network.NetworkSharedContainerName
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}
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|
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// Add the mounts (volumes, bind mounts etc) to the structure. We have to do
|
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// some translation for both the mapped directories passed into HCS and in
|
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// the spec.
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//
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// For HCS, we only pass in the mounts from the spec which are type "bind".
|
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// Further, the "ContainerPath" field (which is a little mis-leadingly
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// named when it applies to the utility VM rather than the container in the
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// utility VM) is moved to under /tmp/gcs/<ID>/binds, where this is passed
|
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// by the caller through a 'uvmpath' option.
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//
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// We do similar translation for the mounts in the spec by stripping out
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// the uvmpath option, and translating the Source path to the location in the
|
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// utility VM calculated above.
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//
|
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// From inside the utility VM, you would see a 9p mount such as in the following
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// where a host folder has been mapped to /target. The line with /tmp/gcs/<ID>/binds
|
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// specifically:
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//
|
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// / # mount
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// rootfs on / type rootfs (rw,size=463736k,nr_inodes=115934)
|
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// proc on /proc type proc (rw,relatime)
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// sysfs on /sys type sysfs (rw,relatime)
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// udev on /dev type devtmpfs (rw,relatime,size=498100k,nr_inodes=124525,mode=755)
|
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// tmpfs on /run type tmpfs (rw,relatime)
|
|
// cgroup on /sys/fs/cgroup type cgroup (rw,relatime,cpuset,cpu,cpuacct,blkio,memory,devices,freezer,net_cls,perf_event,net_prio,hugetlb,pids,rdma)
|
|
// mqueue on /dev/mqueue type mqueue (rw,relatime)
|
|
// devpts on /dev/pts type devpts (rw,relatime,mode=600,ptmxmode=000)
|
|
// /binds/b3ea9126d67702173647ece2744f7c11181c0150e9890fc9a431849838033edc/target on /binds/b3ea9126d67702173647ece2744f7c11181c0150e9890fc9a431849838033edc/target type 9p (rw,sync,dirsync,relatime,trans=fd,rfdno=6,wfdno=6)
|
|
// /dev/pmem0 on /tmp/gcs/b3ea9126d67702173647ece2744f7c11181c0150e9890fc9a431849838033edc/layer0 type ext4 (ro,relatime,block_validity,delalloc,norecovery,barrier,dax,user_xattr,acl)
|
|
// /dev/sda on /tmp/gcs/b3ea9126d67702173647ece2744f7c11181c0150e9890fc9a431849838033edc/scratch type ext4 (rw,relatime,block_validity,delalloc,barrier,user_xattr,acl)
|
|
// overlay on /tmp/gcs/b3ea9126d67702173647ece2744f7c11181c0150e9890fc9a431849838033edc/rootfs type overlay (rw,relatime,lowerdir=/tmp/base/:/tmp/gcs/b3ea9126d67702173647ece2744f7c11181c0150e9890fc9a431849838033edc/layer0,upperdir=/tmp/gcs/b3ea9126d67702173647ece2744f7c11181c0150e9890fc9a431849838033edc/scratch/upper,workdir=/tmp/gcs/b3ea9126d67702173647ece2744f7c11181c0150e9890fc9a431849838033edc/scratch/work)
|
|
//
|
|
// /tmp/gcs/b3ea9126d67702173647ece2744f7c11181c0150e9890fc9a431849838033edc # ls -l
|
|
// total 16
|
|
// drwx------ 3 0 0 60 Sep 7 18:54 binds
|
|
// -rw-r--r-- 1 0 0 3345 Sep 7 18:54 config.json
|
|
// drwxr-xr-x 10 0 0 4096 Sep 6 17:26 layer0
|
|
// drwxr-xr-x 1 0 0 4096 Sep 7 18:54 rootfs
|
|
// drwxr-xr-x 5 0 0 4096 Sep 7 18:54 scratch
|
|
//
|
|
// /tmp/gcs/b3ea9126d67702173647ece2744f7c11181c0150e9890fc9a431849838033edc # ls -l binds
|
|
// total 0
|
|
// drwxrwxrwt 2 0 0 4096 Sep 7 16:51 target
|
|
|
|
mds := []hcsshim.MappedDir{}
|
|
specMounts := []specs.Mount{}
|
|
for _, mount := range spec.Mounts {
|
|
specMount := mount
|
|
if mount.Type == "bind" {
|
|
// Strip out the uvmpath from the options
|
|
updatedOptions := []string{}
|
|
uvmPath := ""
|
|
readonly := false
|
|
for _, opt := range mount.Options {
|
|
dropOption := false
|
|
elements := strings.SplitN(opt, "=", 2)
|
|
switch elements[0] {
|
|
case "uvmpath":
|
|
uvmPath = elements[1]
|
|
dropOption = true
|
|
case "rw":
|
|
case "ro":
|
|
readonly = true
|
|
case "rbind":
|
|
default:
|
|
return fmt.Errorf("unsupported option %q", opt)
|
|
}
|
|
if !dropOption {
|
|
updatedOptions = append(updatedOptions, opt)
|
|
}
|
|
}
|
|
mount.Options = updatedOptions
|
|
if uvmPath == "" {
|
|
return fmt.Errorf("no uvmpath for bind mount %+v", mount)
|
|
}
|
|
md := hcsshim.MappedDir{
|
|
HostPath: mount.Source,
|
|
ContainerPath: path.Join(uvmPath, mount.Destination),
|
|
CreateInUtilityVM: true,
|
|
ReadOnly: readonly,
|
|
}
|
|
// If we are 1803/RS4+ enable LinuxMetadata support by default
|
|
if system.GetOSVersion().Build >= 17134 {
|
|
md.LinuxMetadata = true
|
|
}
|
|
mds = append(mds, md)
|
|
specMount.Source = path.Join(uvmPath, mount.Destination)
|
|
}
|
|
specMounts = append(specMounts, specMount)
|
|
}
|
|
configuration.MappedDirectories = mds
|
|
|
|
hcsContainer, err := hcsshim.CreateContainer(id, configuration)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
spec.Mounts = specMounts
|
|
|
|
// Construct a container object for calling start on it.
|
|
ctr := &container{
|
|
id: id,
|
|
execs: make(map[string]*process),
|
|
isWindows: false,
|
|
ociSpec: spec,
|
|
hcsContainer: hcsContainer,
|
|
status: containerd.Created,
|
|
waitCh: make(chan struct{}),
|
|
}
|
|
|
|
// Start the container.
|
|
logger.Debug("starting container")
|
|
if err = hcsContainer.Start(); err != nil {
|
|
c.logger.WithError(err).Error("failed to start container")
|
|
ctr.debugGCS()
|
|
ctr.Lock()
|
|
if err := c.terminateContainer(ctr); err != nil {
|
|
c.logger.WithError(err).Error("failed to cleanup after a failed Start")
|
|
} else {
|
|
c.logger.Debug("cleaned up after failed Start by calling Terminate")
|
|
}
|
|
ctr.Unlock()
|
|
return err
|
|
}
|
|
ctr.debugGCS()
|
|
|
|
c.Lock()
|
|
c.containers[id] = ctr
|
|
c.Unlock()
|
|
|
|
logger.Debug("createLinux() completed successfully")
|
|
return nil
|
|
}
|
|
|
|
func (c *client) extractResourcesFromSpec(spec *specs.Spec, configuration *hcsshim.ContainerConfig) {
|
|
if spec.Windows.Resources != nil {
|
|
if spec.Windows.Resources.CPU != nil {
|
|
if spec.Windows.Resources.CPU.Count != nil {
|
|
// This check is being done here rather than in adaptContainerSettings
|
|
// because we don't want to update the HostConfig in case this container
|
|
// is moved to a host with more CPUs than this one.
|
|
cpuCount := *spec.Windows.Resources.CPU.Count
|
|
hostCPUCount := uint64(sysinfo.NumCPU())
|
|
if cpuCount > hostCPUCount {
|
|
c.logger.Warnf("Changing requested CPUCount of %d to current number of processors, %d", cpuCount, hostCPUCount)
|
|
cpuCount = hostCPUCount
|
|
}
|
|
configuration.ProcessorCount = uint32(cpuCount)
|
|
}
|
|
if spec.Windows.Resources.CPU.Shares != nil {
|
|
configuration.ProcessorWeight = uint64(*spec.Windows.Resources.CPU.Shares)
|
|
}
|
|
if spec.Windows.Resources.CPU.Maximum != nil {
|
|
configuration.ProcessorMaximum = int64(*spec.Windows.Resources.CPU.Maximum)
|
|
}
|
|
}
|
|
if spec.Windows.Resources.Memory != nil {
|
|
if spec.Windows.Resources.Memory.Limit != nil {
|
|
configuration.MemoryMaximumInMB = int64(*spec.Windows.Resources.Memory.Limit) / 1024 / 1024
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
func (c *client) Start(_ context.Context, id, _ string, withStdin bool, attachStdio libcontainerdtypes.StdioCallback) (int, error) {
|
|
ctr := c.getContainer(id)
|
|
switch {
|
|
case ctr == nil:
|
|
return -1, errors.WithStack(errdefs.NotFound(errors.New("no such container")))
|
|
case ctr.init != nil:
|
|
return -1, errors.WithStack(errdefs.NotModified(errors.New("container already started")))
|
|
}
|
|
|
|
logger := c.logger.WithField("container", id)
|
|
|
|
// Note we always tell HCS to create stdout as it's required
|
|
// regardless of '-i' or '-t' options, so that docker can always grab
|
|
// the output through logs. We also tell HCS to always create stdin,
|
|
// even if it's not used - it will be closed shortly. Stderr is only
|
|
// created if it we're not -t.
|
|
var (
|
|
emulateConsole bool
|
|
createStdErrPipe bool
|
|
)
|
|
if ctr.ociSpec.Process != nil {
|
|
emulateConsole = ctr.ociSpec.Process.Terminal
|
|
createStdErrPipe = !ctr.ociSpec.Process.Terminal
|
|
}
|
|
|
|
createProcessParms := &hcsshim.ProcessConfig{
|
|
EmulateConsole: emulateConsole,
|
|
WorkingDirectory: ctr.ociSpec.Process.Cwd,
|
|
CreateStdInPipe: true,
|
|
CreateStdOutPipe: true,
|
|
CreateStdErrPipe: createStdErrPipe,
|
|
}
|
|
|
|
if ctr.ociSpec.Process != nil && ctr.ociSpec.Process.ConsoleSize != nil {
|
|
createProcessParms.ConsoleSize[0] = uint(ctr.ociSpec.Process.ConsoleSize.Height)
|
|
createProcessParms.ConsoleSize[1] = uint(ctr.ociSpec.Process.ConsoleSize.Width)
|
|
}
|
|
|
|
// Configure the environment for the process
|
|
createProcessParms.Environment = setupEnvironmentVariables(ctr.ociSpec.Process.Env)
|
|
|
|
// Configure the CommandLine/CommandArgs
|
|
setCommandLineAndArgs(ctr.isWindows, ctr.ociSpec.Process, createProcessParms)
|
|
if ctr.isWindows {
|
|
logger.Debugf("start commandLine: %s", createProcessParms.CommandLine)
|
|
}
|
|
|
|
createProcessParms.User = ctr.ociSpec.Process.User.Username
|
|
|
|
// LCOW requires the raw OCI spec passed through HCS and onwards to
|
|
// GCS for the utility VM.
|
|
if !ctr.isWindows {
|
|
ociBuf, err := json.Marshal(ctr.ociSpec)
|
|
if err != nil {
|
|
return -1, err
|
|
}
|
|
ociRaw := json.RawMessage(ociBuf)
|
|
createProcessParms.OCISpecification = &ociRaw
|
|
}
|
|
|
|
ctr.Lock()
|
|
|
|
// Start the command running in the container.
|
|
newProcess, err := ctr.hcsContainer.CreateProcess(createProcessParms)
|
|
if err != nil {
|
|
logger.WithError(err).Error("CreateProcess() failed")
|
|
// Fix for https://github.com/moby/moby/issues/38719.
|
|
// If the init process failed to launch, we still need to reap the
|
|
// container to avoid leaking it.
|
|
//
|
|
// Note we use the explicit exit code of 127 which is the
|
|
// Linux shell equivalent of "command not found". Windows cannot
|
|
// know ahead of time whether or not the command exists, especially
|
|
// in the case of Hyper-V containers.
|
|
ctr.Unlock()
|
|
exitedAt := time.Now()
|
|
p := &process{
|
|
id: libcontainerdtypes.InitProcessName,
|
|
pid: 0,
|
|
}
|
|
c.reapContainer(ctr, p, 127, exitedAt, nil, logger)
|
|
return -1, err
|
|
}
|
|
|
|
defer ctr.Unlock()
|
|
|
|
defer func() {
|
|
if err != nil {
|
|
if err := newProcess.Kill(); err != nil {
|
|
logger.WithError(err).Error("failed to kill process")
|
|
}
|
|
go func() {
|
|
if err := newProcess.Wait(); err != nil {
|
|
logger.WithError(err).Error("failed to wait for process")
|
|
}
|
|
if err := newProcess.Close(); err != nil {
|
|
logger.WithError(err).Error("failed to clean process resources")
|
|
}
|
|
}()
|
|
}
|
|
}()
|
|
p := &process{
|
|
hcsProcess: newProcess,
|
|
id: libcontainerdtypes.InitProcessName,
|
|
pid: newProcess.Pid(),
|
|
}
|
|
logger.WithField("pid", p.pid).Debug("init process started")
|
|
|
|
ctr.status = containerd.Running
|
|
ctr.init = p
|
|
|
|
// Spin up a go routine waiting for exit to handle cleanup
|
|
go c.reapProcess(ctr, p)
|
|
|
|
// Don't shadow err here due to our deferred clean-up.
|
|
var dio *cio.DirectIO
|
|
dio, err = newIOFromProcess(newProcess, ctr.ociSpec.Process.Terminal)
|
|
if err != nil {
|
|
logger.WithError(err).Error("failed to get stdio pipes")
|
|
return -1, err
|
|
}
|
|
_, err = attachStdio(dio)
|
|
if err != nil {
|
|
logger.WithError(err).Error("failed to attach stdio")
|
|
return -1, err
|
|
}
|
|
|
|
// Generate the associated event
|
|
c.eventQ.Append(id, func() {
|
|
ei := libcontainerdtypes.EventInfo{
|
|
ContainerID: id,
|
|
ProcessID: libcontainerdtypes.InitProcessName,
|
|
Pid: uint32(p.pid),
|
|
}
|
|
c.logger.WithFields(logrus.Fields{
|
|
"container": ctr.id,
|
|
"event": libcontainerdtypes.EventStart,
|
|
"event-info": ei,
|
|
}).Info("sending event")
|
|
err := c.backend.ProcessEvent(ei.ContainerID, libcontainerdtypes.EventStart, ei)
|
|
if err != nil {
|
|
c.logger.WithError(err).WithFields(logrus.Fields{
|
|
"container": id,
|
|
"event": libcontainerdtypes.EventStart,
|
|
"event-info": ei,
|
|
}).Error("failed to process event")
|
|
}
|
|
})
|
|
logger.Debug("start() completed")
|
|
return p.pid, nil
|
|
}
|
|
|
|
// setCommandLineAndArgs configures the HCS ProcessConfig based on an OCI process spec
|
|
func setCommandLineAndArgs(isWindows bool, process *specs.Process, createProcessParms *hcsshim.ProcessConfig) {
|
|
if isWindows {
|
|
if process.CommandLine != "" {
|
|
createProcessParms.CommandLine = process.CommandLine
|
|
} else {
|
|
createProcessParms.CommandLine = system.EscapeArgs(process.Args)
|
|
}
|
|
} else {
|
|
createProcessParms.CommandArgs = process.Args
|
|
}
|
|
}
|
|
|
|
func newIOFromProcess(newProcess hcsshim.Process, terminal bool) (*cio.DirectIO, error) {
|
|
stdin, stdout, stderr, err := newProcess.Stdio()
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
dio := cio.NewDirectIO(createStdInCloser(stdin, newProcess), nil, nil, terminal)
|
|
|
|
// Convert io.ReadClosers to io.Readers
|
|
if stdout != nil {
|
|
dio.Stdout = ioutil.NopCloser(&autoClosingReader{ReadCloser: stdout})
|
|
}
|
|
if stderr != nil {
|
|
dio.Stderr = ioutil.NopCloser(&autoClosingReader{ReadCloser: stderr})
|
|
}
|
|
return dio, nil
|
|
}
|
|
|
|
// Exec adds a process in an running container
|
|
func (c *client) Exec(ctx context.Context, containerID, processID string, spec *specs.Process, withStdin bool, attachStdio libcontainerdtypes.StdioCallback) (int, error) {
|
|
ctr := c.getContainer(containerID)
|
|
switch {
|
|
case ctr == nil:
|
|
return -1, errors.WithStack(errdefs.NotFound(errors.New("no such container")))
|
|
case ctr.hcsContainer == nil:
|
|
return -1, errors.WithStack(errdefs.InvalidParameter(errors.New("container is not running")))
|
|
case ctr.execs != nil && ctr.execs[processID] != nil:
|
|
return -1, errors.WithStack(errdefs.Conflict(errors.New("id already in use")))
|
|
}
|
|
logger := c.logger.WithFields(logrus.Fields{
|
|
"container": containerID,
|
|
"exec": processID,
|
|
})
|
|
|
|
// Note we always tell HCS to
|
|
// create stdout as it's required regardless of '-i' or '-t' options, so that
|
|
// docker can always grab the output through logs. We also tell HCS to always
|
|
// create stdin, even if it's not used - it will be closed shortly. Stderr
|
|
// is only created if it we're not -t.
|
|
createProcessParms := &hcsshim.ProcessConfig{
|
|
CreateStdInPipe: true,
|
|
CreateStdOutPipe: true,
|
|
CreateStdErrPipe: !spec.Terminal,
|
|
}
|
|
if spec.Terminal {
|
|
createProcessParms.EmulateConsole = true
|
|
if spec.ConsoleSize != nil {
|
|
createProcessParms.ConsoleSize[0] = uint(spec.ConsoleSize.Height)
|
|
createProcessParms.ConsoleSize[1] = uint(spec.ConsoleSize.Width)
|
|
}
|
|
}
|
|
|
|
// Take working directory from the process to add if it is defined,
|
|
// otherwise take from the first process.
|
|
if spec.Cwd != "" {
|
|
createProcessParms.WorkingDirectory = spec.Cwd
|
|
} else {
|
|
createProcessParms.WorkingDirectory = ctr.ociSpec.Process.Cwd
|
|
}
|
|
|
|
// Configure the environment for the process
|
|
createProcessParms.Environment = setupEnvironmentVariables(spec.Env)
|
|
|
|
// Configure the CommandLine/CommandArgs
|
|
setCommandLineAndArgs(ctr.isWindows, spec, createProcessParms)
|
|
logger.Debugf("exec commandLine: %s", createProcessParms.CommandLine)
|
|
|
|
createProcessParms.User = spec.User.Username
|
|
|
|
// Start the command running in the container.
|
|
newProcess, err := ctr.hcsContainer.CreateProcess(createProcessParms)
|
|
if err != nil {
|
|
logger.WithError(err).Errorf("exec's CreateProcess() failed")
|
|
return -1, err
|
|
}
|
|
pid := newProcess.Pid()
|
|
defer func() {
|
|
if err != nil {
|
|
if err := newProcess.Kill(); err != nil {
|
|
logger.WithError(err).Error("failed to kill process")
|
|
}
|
|
go func() {
|
|
if err := newProcess.Wait(); err != nil {
|
|
logger.WithError(err).Error("failed to wait for process")
|
|
}
|
|
if err := newProcess.Close(); err != nil {
|
|
logger.WithError(err).Error("failed to clean process resources")
|
|
}
|
|
}()
|
|
}
|
|
}()
|
|
|
|
dio, err := newIOFromProcess(newProcess, spec.Terminal)
|
|
if err != nil {
|
|
logger.WithError(err).Error("failed to get stdio pipes")
|
|
return -1, err
|
|
}
|
|
// Tell the engine to attach streams back to the client
|
|
_, err = attachStdio(dio)
|
|
if err != nil {
|
|
return -1, err
|
|
}
|
|
|
|
p := &process{
|
|
id: processID,
|
|
pid: pid,
|
|
hcsProcess: newProcess,
|
|
}
|
|
|
|
// Add the process to the container's list of processes
|
|
ctr.Lock()
|
|
ctr.execs[processID] = p
|
|
ctr.Unlock()
|
|
|
|
// Spin up a go routine waiting for exit to handle cleanup
|
|
go c.reapProcess(ctr, p)
|
|
|
|
c.eventQ.Append(ctr.id, func() {
|
|
ei := libcontainerdtypes.EventInfo{
|
|
ContainerID: ctr.id,
|
|
ProcessID: p.id,
|
|
Pid: uint32(p.pid),
|
|
}
|
|
c.logger.WithFields(logrus.Fields{
|
|
"container": ctr.id,
|
|
"event": libcontainerdtypes.EventExecAdded,
|
|
"event-info": ei,
|
|
}).Info("sending event")
|
|
err := c.backend.ProcessEvent(ctr.id, libcontainerdtypes.EventExecAdded, ei)
|
|
if err != nil {
|
|
c.logger.WithError(err).WithFields(logrus.Fields{
|
|
"container": ctr.id,
|
|
"event": libcontainerdtypes.EventExecAdded,
|
|
"event-info": ei,
|
|
}).Error("failed to process event")
|
|
}
|
|
err = c.backend.ProcessEvent(ctr.id, libcontainerdtypes.EventExecStarted, ei)
|
|
if err != nil {
|
|
c.logger.WithError(err).WithFields(logrus.Fields{
|
|
"container": ctr.id,
|
|
"event": libcontainerdtypes.EventExecStarted,
|
|
"event-info": ei,
|
|
}).Error("failed to process event")
|
|
}
|
|
})
|
|
|
|
return pid, nil
|
|
}
|
|
|
|
// Signal handles `docker stop` on Windows. While Linux has support for
|
|
// the full range of signals, signals aren't really implemented on Windows.
|
|
// We fake supporting regular stop and -9 to force kill.
|
|
func (c *client) SignalProcess(_ context.Context, containerID, processID string, signal int) error {
|
|
ctr, p, err := c.getProcess(containerID, processID)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
logger := c.logger.WithFields(logrus.Fields{
|
|
"container": containerID,
|
|
"process": processID,
|
|
"pid": p.pid,
|
|
"signal": signal,
|
|
})
|
|
logger.Debug("Signal()")
|
|
|
|
if processID == libcontainerdtypes.InitProcessName {
|
|
if syscall.Signal(signal) == syscall.SIGKILL {
|
|
// Terminate the compute system
|
|
ctr.Lock()
|
|
ctr.terminateInvoked = true
|
|
if err := ctr.hcsContainer.Terminate(); err != nil {
|
|
if !hcsshim.IsPending(err) {
|
|
logger.WithError(err).Error("failed to terminate hccshim container")
|
|
}
|
|
}
|
|
ctr.Unlock()
|
|
} else {
|
|
// Shut down the container
|
|
if err := ctr.hcsContainer.Shutdown(); err != nil {
|
|
if !hcsshim.IsPending(err) && !hcsshim.IsAlreadyStopped(err) {
|
|
// ignore errors
|
|
logger.WithError(err).Error("failed to shutdown hccshim container")
|
|
}
|
|
}
|
|
}
|
|
} else {
|
|
return p.hcsProcess.Kill()
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
// Resize handles a CLI event to resize an interactive docker run or docker
|
|
// exec window.
|
|
func (c *client) ResizeTerminal(_ context.Context, containerID, processID string, width, height int) error {
|
|
_, p, err := c.getProcess(containerID, processID)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
c.logger.WithFields(logrus.Fields{
|
|
"container": containerID,
|
|
"process": processID,
|
|
"height": height,
|
|
"width": width,
|
|
"pid": p.pid,
|
|
}).Debug("resizing")
|
|
return p.hcsProcess.ResizeConsole(uint16(width), uint16(height))
|
|
}
|
|
|
|
func (c *client) CloseStdin(_ context.Context, containerID, processID string) error {
|
|
_, p, err := c.getProcess(containerID, processID)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
return p.hcsProcess.CloseStdin()
|
|
}
|
|
|
|
// Pause handles pause requests for containers
|
|
func (c *client) Pause(_ context.Context, containerID string) error {
|
|
ctr, _, err := c.getProcess(containerID, libcontainerdtypes.InitProcessName)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
if ctr.ociSpec.Windows.HyperV == nil {
|
|
return errors.New("cannot pause Windows Server Containers")
|
|
}
|
|
|
|
ctr.Lock()
|
|
defer ctr.Unlock()
|
|
|
|
if err = ctr.hcsContainer.Pause(); err != nil {
|
|
return err
|
|
}
|
|
|
|
ctr.status = containerd.Paused
|
|
|
|
c.eventQ.Append(containerID, func() {
|
|
err := c.backend.ProcessEvent(containerID, libcontainerdtypes.EventPaused, libcontainerdtypes.EventInfo{
|
|
ContainerID: containerID,
|
|
ProcessID: libcontainerdtypes.InitProcessName,
|
|
})
|
|
c.logger.WithFields(logrus.Fields{
|
|
"container": ctr.id,
|
|
"event": libcontainerdtypes.EventPaused,
|
|
}).Info("sending event")
|
|
if err != nil {
|
|
c.logger.WithError(err).WithFields(logrus.Fields{
|
|
"container": containerID,
|
|
"event": libcontainerdtypes.EventPaused,
|
|
}).Error("failed to process event")
|
|
}
|
|
})
|
|
|
|
return nil
|
|
}
|
|
|
|
// Resume handles resume requests for containers
|
|
func (c *client) Resume(_ context.Context, containerID string) error {
|
|
ctr, _, err := c.getProcess(containerID, libcontainerdtypes.InitProcessName)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
if ctr.ociSpec.Windows.HyperV == nil {
|
|
return errors.New("cannot resume Windows Server Containers")
|
|
}
|
|
|
|
ctr.Lock()
|
|
defer ctr.Unlock()
|
|
|
|
if err = ctr.hcsContainer.Resume(); err != nil {
|
|
return err
|
|
}
|
|
|
|
ctr.status = containerd.Running
|
|
|
|
c.eventQ.Append(containerID, func() {
|
|
err := c.backend.ProcessEvent(containerID, libcontainerdtypes.EventResumed, libcontainerdtypes.EventInfo{
|
|
ContainerID: containerID,
|
|
ProcessID: libcontainerdtypes.InitProcessName,
|
|
})
|
|
c.logger.WithFields(logrus.Fields{
|
|
"container": ctr.id,
|
|
"event": libcontainerdtypes.EventResumed,
|
|
}).Info("sending event")
|
|
if err != nil {
|
|
c.logger.WithError(err).WithFields(logrus.Fields{
|
|
"container": containerID,
|
|
"event": libcontainerdtypes.EventResumed,
|
|
}).Error("failed to process event")
|
|
}
|
|
})
|
|
|
|
return nil
|
|
}
|
|
|
|
// Stats handles stats requests for containers
|
|
func (c *client) Stats(_ context.Context, containerID string) (*libcontainerdtypes.Stats, error) {
|
|
ctr, _, err := c.getProcess(containerID, libcontainerdtypes.InitProcessName)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
readAt := time.Now()
|
|
s, err := ctr.hcsContainer.Statistics()
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
return &libcontainerdtypes.Stats{
|
|
Read: readAt,
|
|
HCSStats: &s,
|
|
}, nil
|
|
}
|
|
|
|
// Restore is the handler for restoring a container
|
|
func (c *client) Restore(ctx context.Context, id string, attachStdio libcontainerdtypes.StdioCallback) (bool, int, libcontainerdtypes.Process, error) {
|
|
c.logger.WithField("container", id).Debug("restore()")
|
|
|
|
// TODO Windows: On RS1, a re-attach isn't possible.
|
|
// However, there is a scenario in which there is an issue.
|
|
// Consider a background container. The daemon dies unexpectedly.
|
|
// HCS will still have the compute service alive and running.
|
|
// For consistence, we call in to shoot it regardless if HCS knows about it
|
|
// We explicitly just log a warning if the terminate fails.
|
|
// Then we tell the backend the container exited.
|
|
if hc, err := hcsshim.OpenContainer(id); err == nil {
|
|
const terminateTimeout = time.Minute * 2
|
|
err := hc.Terminate()
|
|
|
|
if hcsshim.IsPending(err) {
|
|
err = hc.WaitTimeout(terminateTimeout)
|
|
} else if hcsshim.IsAlreadyStopped(err) {
|
|
err = nil
|
|
}
|
|
|
|
if err != nil {
|
|
c.logger.WithField("container", id).WithError(err).Debug("terminate failed on restore")
|
|
return false, -1, nil, err
|
|
}
|
|
}
|
|
return false, -1, &restoredProcess{
|
|
c: c,
|
|
id: id,
|
|
}, nil
|
|
}
|
|
|
|
// GetPidsForContainer returns a list of process IDs running in a container.
|
|
// Not used on Windows.
|
|
func (c *client) ListPids(_ context.Context, _ string) ([]uint32, error) {
|
|
return nil, errors.New("not implemented on Windows")
|
|
}
|
|
|
|
// Summary returns a summary of the processes running in a container.
|
|
// This is present in Windows to support docker top. In linux, the
|
|
// engine shells out to ps to get process information. On Windows, as
|
|
// the containers could be Hyper-V containers, they would not be
|
|
// visible on the container host. However, libcontainerd does have
|
|
// that information.
|
|
func (c *client) Summary(_ context.Context, containerID string) ([]libcontainerdtypes.Summary, error) {
|
|
ctr, _, err := c.getProcess(containerID, libcontainerdtypes.InitProcessName)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
p, err := ctr.hcsContainer.ProcessList()
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
pl := make([]libcontainerdtypes.Summary, len(p))
|
|
for i := range p {
|
|
pl[i] = libcontainerdtypes.Summary{
|
|
ImageName: p[i].ImageName,
|
|
CreatedAt: p[i].CreateTimestamp,
|
|
KernelTime_100Ns: p[i].KernelTime100ns,
|
|
MemoryCommitBytes: p[i].MemoryCommitBytes,
|
|
MemoryWorkingSetPrivateBytes: p[i].MemoryWorkingSetPrivateBytes,
|
|
MemoryWorkingSetSharedBytes: p[i].MemoryWorkingSetSharedBytes,
|
|
ProcessID: p[i].ProcessId,
|
|
UserTime_100Ns: p[i].UserTime100ns,
|
|
ExecID: "",
|
|
}
|
|
}
|
|
return pl, nil
|
|
}
|
|
|
|
type restoredProcess struct {
|
|
id string
|
|
c *client
|
|
}
|
|
|
|
func (p *restoredProcess) Delete(ctx context.Context) (uint32, time.Time, error) {
|
|
return p.c.DeleteTask(ctx, p.id)
|
|
}
|
|
|
|
func (c *client) DeleteTask(ctx context.Context, containerID string) (uint32, time.Time, error) {
|
|
ec := -1
|
|
ctr := c.getContainer(containerID)
|
|
if ctr == nil {
|
|
return uint32(ec), time.Now(), errors.WithStack(errdefs.NotFound(errors.New("no such container")))
|
|
}
|
|
|
|
select {
|
|
case <-ctx.Done():
|
|
return uint32(ec), time.Now(), errors.WithStack(ctx.Err())
|
|
case <-ctr.waitCh:
|
|
default:
|
|
return uint32(ec), time.Now(), errors.New("container is not stopped")
|
|
}
|
|
|
|
ctr.Lock()
|
|
defer ctr.Unlock()
|
|
return ctr.exitCode, ctr.exitedAt, nil
|
|
}
|
|
|
|
func (c *client) Delete(_ context.Context, containerID string) error {
|
|
c.Lock()
|
|
defer c.Unlock()
|
|
ctr := c.containers[containerID]
|
|
if ctr == nil {
|
|
return errors.WithStack(errdefs.NotFound(errors.New("no such container")))
|
|
}
|
|
|
|
ctr.Lock()
|
|
defer ctr.Unlock()
|
|
|
|
switch ctr.status {
|
|
case containerd.Created:
|
|
if err := c.shutdownContainer(ctr); err != nil {
|
|
return err
|
|
}
|
|
fallthrough
|
|
case containerd.Stopped:
|
|
delete(c.containers, containerID)
|
|
return nil
|
|
}
|
|
|
|
return errors.WithStack(errdefs.InvalidParameter(errors.New("container is not stopped")))
|
|
}
|
|
|
|
func (c *client) Status(ctx context.Context, containerID string) (containerd.ProcessStatus, error) {
|
|
c.Lock()
|
|
defer c.Unlock()
|
|
ctr := c.containers[containerID]
|
|
if ctr == nil {
|
|
return containerd.Unknown, errors.WithStack(errdefs.NotFound(errors.New("no such container")))
|
|
}
|
|
|
|
ctr.Lock()
|
|
defer ctr.Unlock()
|
|
return ctr.status, nil
|
|
}
|
|
|
|
func (c *client) UpdateResources(ctx context.Context, containerID string, resources *libcontainerdtypes.Resources) error {
|
|
// Updating resource isn't supported on Windows
|
|
// but we should return nil for enabling updating container
|
|
return nil
|
|
}
|
|
|
|
func (c *client) CreateCheckpoint(ctx context.Context, containerID, checkpointDir string, exit bool) error {
|
|
return errors.New("Windows: Containers do not support checkpoints")
|
|
}
|
|
|
|
func (c *client) getContainer(id string) *container {
|
|
c.Lock()
|
|
ctr := c.containers[id]
|
|
c.Unlock()
|
|
|
|
return ctr
|
|
}
|
|
|
|
func (c *client) getProcess(containerID, processID string) (*container, *process, error) {
|
|
ctr := c.getContainer(containerID)
|
|
switch {
|
|
case ctr == nil:
|
|
return nil, nil, errors.WithStack(errdefs.NotFound(errors.New("no such container")))
|
|
case ctr.init == nil:
|
|
return nil, nil, errors.WithStack(errdefs.NotFound(errors.New("container is not running")))
|
|
case processID == libcontainerdtypes.InitProcessName:
|
|
return ctr, ctr.init, nil
|
|
default:
|
|
ctr.Lock()
|
|
defer ctr.Unlock()
|
|
if ctr.execs == nil {
|
|
return nil, nil, errors.WithStack(errdefs.NotFound(errors.New("no execs")))
|
|
}
|
|
}
|
|
|
|
p := ctr.execs[processID]
|
|
if p == nil {
|
|
return nil, nil, errors.WithStack(errdefs.NotFound(errors.New("no such exec")))
|
|
}
|
|
|
|
return ctr, p, nil
|
|
}
|
|
|
|
// ctr mutex must be held when calling this function.
|
|
func (c *client) shutdownContainer(ctr *container) error {
|
|
var err error
|
|
const waitTimeout = time.Minute * 5
|
|
|
|
if !ctr.terminateInvoked {
|
|
err = ctr.hcsContainer.Shutdown()
|
|
}
|
|
|
|
if hcsshim.IsPending(err) || ctr.terminateInvoked {
|
|
err = ctr.hcsContainer.WaitTimeout(waitTimeout)
|
|
} else if hcsshim.IsAlreadyStopped(err) {
|
|
err = nil
|
|
}
|
|
|
|
if err != nil {
|
|
c.logger.WithError(err).WithField("container", ctr.id).
|
|
Debug("failed to shutdown container, terminating it")
|
|
terminateErr := c.terminateContainer(ctr)
|
|
if terminateErr != nil {
|
|
c.logger.WithError(terminateErr).WithField("container", ctr.id).
|
|
Error("failed to shutdown container, and subsequent terminate also failed")
|
|
return fmt.Errorf("%s: subsequent terminate failed %s", err, terminateErr)
|
|
}
|
|
return err
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
// ctr mutex must be held when calling this function.
|
|
func (c *client) terminateContainer(ctr *container) error {
|
|
const terminateTimeout = time.Minute * 5
|
|
ctr.terminateInvoked = true
|
|
err := ctr.hcsContainer.Terminate()
|
|
|
|
if hcsshim.IsPending(err) {
|
|
err = ctr.hcsContainer.WaitTimeout(terminateTimeout)
|
|
} else if hcsshim.IsAlreadyStopped(err) {
|
|
err = nil
|
|
}
|
|
|
|
if err != nil {
|
|
c.logger.WithError(err).WithField("container", ctr.id).
|
|
Debug("failed to terminate container")
|
|
return err
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
func (c *client) reapProcess(ctr *container, p *process) int {
|
|
logger := c.logger.WithFields(logrus.Fields{
|
|
"container": ctr.id,
|
|
"process": p.id,
|
|
})
|
|
|
|
var eventErr error
|
|
|
|
// Block indefinitely for the process to exit.
|
|
if err := p.hcsProcess.Wait(); err != nil {
|
|
if herr, ok := err.(*hcsshim.ProcessError); ok && herr.Err != windows.ERROR_BROKEN_PIPE {
|
|
logger.WithError(err).Warnf("Wait() failed (container may have been killed)")
|
|
}
|
|
// Fall through here, do not return. This ensures we attempt to
|
|
// continue the shutdown in HCS and tell the docker engine that the
|
|
// process/container has exited to avoid a container being dropped on
|
|
// the floor.
|
|
}
|
|
exitedAt := time.Now()
|
|
|
|
exitCode, err := p.hcsProcess.ExitCode()
|
|
if err != nil {
|
|
if herr, ok := err.(*hcsshim.ProcessError); ok && herr.Err != windows.ERROR_BROKEN_PIPE {
|
|
logger.WithError(err).Warnf("unable to get exit code for process")
|
|
}
|
|
// Since we got an error retrieving the exit code, make sure that the
|
|
// code we return doesn't incorrectly indicate success.
|
|
exitCode = -1
|
|
|
|
// Fall through here, do not return. This ensures we attempt to
|
|
// continue the shutdown in HCS and tell the docker engine that the
|
|
// process/container has exited to avoid a container being dropped on
|
|
// the floor.
|
|
}
|
|
|
|
if err := p.hcsProcess.Close(); err != nil {
|
|
logger.WithError(err).Warnf("failed to cleanup hcs process resources")
|
|
exitCode = -1
|
|
eventErr = fmt.Errorf("hcsProcess.Close() failed %s", err)
|
|
}
|
|
|
|
if p.id == libcontainerdtypes.InitProcessName {
|
|
exitCode, eventErr = c.reapContainer(ctr, p, exitCode, exitedAt, eventErr, logger)
|
|
}
|
|
|
|
c.eventQ.Append(ctr.id, func() {
|
|
ei := libcontainerdtypes.EventInfo{
|
|
ContainerID: ctr.id,
|
|
ProcessID: p.id,
|
|
Pid: uint32(p.pid),
|
|
ExitCode: uint32(exitCode),
|
|
ExitedAt: exitedAt,
|
|
Error: eventErr,
|
|
}
|
|
c.logger.WithFields(logrus.Fields{
|
|
"container": ctr.id,
|
|
"event": libcontainerdtypes.EventExit,
|
|
"event-info": ei,
|
|
}).Info("sending event")
|
|
err := c.backend.ProcessEvent(ctr.id, libcontainerdtypes.EventExit, ei)
|
|
if err != nil {
|
|
c.logger.WithError(err).WithFields(logrus.Fields{
|
|
"container": ctr.id,
|
|
"event": libcontainerdtypes.EventExit,
|
|
"event-info": ei,
|
|
}).Error("failed to process event")
|
|
}
|
|
if p.id != libcontainerdtypes.InitProcessName {
|
|
ctr.Lock()
|
|
delete(ctr.execs, p.id)
|
|
ctr.Unlock()
|
|
}
|
|
})
|
|
|
|
return exitCode
|
|
}
|
|
|
|
// reapContainer shuts down the container and releases associated resources. It returns
|
|
// the error to be logged in the eventInfo sent back to the monitor.
|
|
func (c *client) reapContainer(ctr *container, p *process, exitCode int, exitedAt time.Time, eventErr error, logger *logrus.Entry) (int, error) {
|
|
// Update container status
|
|
ctr.Lock()
|
|
ctr.status = containerd.Stopped
|
|
ctr.exitedAt = exitedAt
|
|
ctr.exitCode = uint32(exitCode)
|
|
close(ctr.waitCh)
|
|
|
|
if err := c.shutdownContainer(ctr); err != nil {
|
|
exitCode = -1
|
|
logger.WithError(err).Warn("failed to shutdown container")
|
|
thisErr := errors.Wrap(err, "failed to shutdown container")
|
|
if eventErr != nil {
|
|
eventErr = errors.Wrap(eventErr, thisErr.Error())
|
|
} else {
|
|
eventErr = thisErr
|
|
}
|
|
} else {
|
|
logger.Debug("completed container shutdown")
|
|
}
|
|
ctr.Unlock()
|
|
|
|
if err := ctr.hcsContainer.Close(); err != nil {
|
|
exitCode = -1
|
|
logger.WithError(err).Error("failed to clean hcs container resources")
|
|
thisErr := errors.Wrap(err, "failed to terminate container")
|
|
if eventErr != nil {
|
|
eventErr = errors.Wrap(eventErr, thisErr.Error())
|
|
} else {
|
|
eventErr = thisErr
|
|
}
|
|
}
|
|
return exitCode, eventErr
|
|
}
|