mirror of
https://github.com/moby/moby.git
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329 lines
10 KiB
Go
329 lines
10 KiB
Go
package daemon
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import (
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"fmt"
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"net"
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"runtime"
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"strings"
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"time"
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"github.com/pkg/errors"
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"github.com/Sirupsen/logrus"
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apierrors "github.com/docker/docker/api/errors"
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"github.com/docker/docker/api/types"
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containertypes "github.com/docker/docker/api/types/container"
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networktypes "github.com/docker/docker/api/types/network"
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"github.com/docker/docker/container"
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"github.com/docker/docker/image"
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"github.com/docker/docker/layer"
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"github.com/docker/docker/pkg/idtools"
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"github.com/docker/docker/pkg/stringid"
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"github.com/docker/docker/pkg/system"
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"github.com/docker/docker/runconfig"
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"github.com/opencontainers/selinux/go-selinux/label"
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)
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// CreateManagedContainer creates a container that is managed by a Service
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func (daemon *Daemon) CreateManagedContainer(params types.ContainerCreateConfig) (containertypes.ContainerCreateCreatedBody, error) {
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return daemon.containerCreate(params, true)
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}
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// ContainerCreate creates a regular container
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func (daemon *Daemon) ContainerCreate(params types.ContainerCreateConfig) (containertypes.ContainerCreateCreatedBody, error) {
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return daemon.containerCreate(params, false)
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}
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func (daemon *Daemon) containerCreate(params types.ContainerCreateConfig, managed bool) (containertypes.ContainerCreateCreatedBody, error) {
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start := time.Now()
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if params.Config == nil {
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return containertypes.ContainerCreateCreatedBody{}, fmt.Errorf("Config cannot be empty in order to create a container")
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}
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warnings, err := daemon.verifyContainerSettings(params.HostConfig, params.Config, false)
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if err != nil {
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return containertypes.ContainerCreateCreatedBody{Warnings: warnings}, err
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}
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err = daemon.verifyNetworkingConfig(params.NetworkingConfig)
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if err != nil {
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return containertypes.ContainerCreateCreatedBody{Warnings: warnings}, err
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}
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if params.HostConfig == nil {
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params.HostConfig = &containertypes.HostConfig{}
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}
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err = daemon.adaptContainerSettings(params.HostConfig, params.AdjustCPUShares)
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if err != nil {
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return containertypes.ContainerCreateCreatedBody{Warnings: warnings}, err
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}
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container, err := daemon.create(params, managed)
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if err != nil {
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return containertypes.ContainerCreateCreatedBody{Warnings: warnings}, daemon.imageNotExistToErrcode(err)
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}
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containerActions.WithValues("create").UpdateSince(start)
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return containertypes.ContainerCreateCreatedBody{ID: container.ID, Warnings: warnings}, nil
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}
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// Create creates a new container from the given configuration with a given name.
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func (daemon *Daemon) create(params types.ContainerCreateConfig, managed bool) (retC *container.Container, retErr error) {
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var (
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container *container.Container
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img *image.Image
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imgID image.ID
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err error
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)
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// TODO: @jhowardmsft LCOW support - at a later point, can remove the hard-coding
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// to force the platform to be linux.
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// Default the platform if not supplied
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if params.Platform == "" {
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params.Platform = runtime.GOOS
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}
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if params.Platform == "windows" && system.LCOWSupported() {
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params.Platform = "linux"
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}
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if params.Config.Image != "" {
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img, err = daemon.GetImage(params.Config.Image)
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if err != nil {
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return nil, err
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}
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if runtime.GOOS == "solaris" && img.OS != "solaris " {
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return nil, errors.New("platform on which parent image was created is not Solaris")
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}
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imgID = img.ID()
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if runtime.GOOS == "windows" && img.OS == "linux" && !system.LCOWSupported() {
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return nil, errors.New("platform on which parent image was created is not Windows")
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}
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}
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// Make sure the platform requested matches the image
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if img != nil {
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if params.Platform != img.Platform() {
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// Ignore this in LCOW mode. @jhowardmsft TODO - This will need revisiting later.
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if !(runtime.GOOS == "windows" && system.LCOWSupported()) {
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return nil, fmt.Errorf("cannot create a %s container from a %s image", params.Platform, img.Platform())
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}
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}
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}
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if err := daemon.mergeAndVerifyConfig(params.Config, img); err != nil {
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return nil, err
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}
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if err := daemon.mergeAndVerifyLogConfig(¶ms.HostConfig.LogConfig); err != nil {
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return nil, err
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}
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if container, err = daemon.newContainer(params.Name, params.Platform, params.Config, params.HostConfig, imgID, managed); err != nil {
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return nil, err
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}
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defer func() {
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if retErr != nil {
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if err := daemon.cleanupContainer(container, true, true); err != nil {
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logrus.Errorf("failed to cleanup container on create error: %v", err)
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}
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}
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}()
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if err := daemon.setSecurityOptions(container, params.HostConfig); err != nil {
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return nil, err
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}
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container.HostConfig.StorageOpt = params.HostConfig.StorageOpt
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// Set RWLayer for container after mount labels have been set
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if err := daemon.setRWLayer(container); err != nil {
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return nil, err
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}
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rootIDs := daemon.idMappings.RootPair()
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if err := idtools.MkdirAndChown(container.Root, 0700, rootIDs); err != nil {
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return nil, err
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}
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if err := idtools.MkdirAndChown(container.CheckpointDir(), 0700, rootIDs); err != nil {
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return nil, err
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}
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if err := daemon.setHostConfig(container, params.HostConfig); err != nil {
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return nil, err
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}
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if err := daemon.createContainerPlatformSpecificSettings(container, params.Config, params.HostConfig); err != nil {
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return nil, err
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}
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var endpointsConfigs map[string]*networktypes.EndpointSettings
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if params.NetworkingConfig != nil {
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endpointsConfigs = params.NetworkingConfig.EndpointsConfig
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}
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// Make sure NetworkMode has an acceptable value. We do this to ensure
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// backwards API compatibility.
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runconfig.SetDefaultNetModeIfBlank(container.HostConfig)
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daemon.updateContainerNetworkSettings(container, endpointsConfigs)
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if err := container.ToDisk(); err != nil {
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logrus.Errorf("Error saving new container to disk: %v", err)
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return nil, err
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}
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daemon.Register(container)
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stateCtr.set(container.ID, "stopped")
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daemon.LogContainerEvent(container, "create")
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return container, nil
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}
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func toHostConfigSelinuxLabels(labels []string) []string {
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for i, l := range labels {
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labels[i] = "label=" + l
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}
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return labels
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}
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func (daemon *Daemon) generateSecurityOpt(hostConfig *containertypes.HostConfig) ([]string, error) {
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for _, opt := range hostConfig.SecurityOpt {
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con := strings.Split(opt, "=")
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if con[0] == "label" {
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// Caller overrode SecurityOpts
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return nil, nil
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}
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}
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ipcMode := hostConfig.IpcMode
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pidMode := hostConfig.PidMode
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privileged := hostConfig.Privileged
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if ipcMode.IsHost() || pidMode.IsHost() || privileged {
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return toHostConfigSelinuxLabels(label.DisableSecOpt()), nil
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}
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var ipcLabel []string
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var pidLabel []string
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ipcContainer := ipcMode.Container()
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pidContainer := pidMode.Container()
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if ipcContainer != "" {
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c, err := daemon.GetContainer(ipcContainer)
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if err != nil {
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return nil, err
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}
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ipcLabel = label.DupSecOpt(c.ProcessLabel)
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if pidContainer == "" {
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return toHostConfigSelinuxLabels(ipcLabel), err
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}
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}
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if pidContainer != "" {
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c, err := daemon.GetContainer(pidContainer)
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if err != nil {
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return nil, err
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}
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pidLabel = label.DupSecOpt(c.ProcessLabel)
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if ipcContainer == "" {
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return toHostConfigSelinuxLabels(pidLabel), err
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}
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}
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if pidLabel != nil && ipcLabel != nil {
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for i := 0; i < len(pidLabel); i++ {
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if pidLabel[i] != ipcLabel[i] {
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return nil, fmt.Errorf("--ipc and --pid containers SELinux labels aren't the same")
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}
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}
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return toHostConfigSelinuxLabels(pidLabel), nil
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}
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return nil, nil
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}
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func (daemon *Daemon) setRWLayer(container *container.Container) error {
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var layerID layer.ChainID
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if container.ImageID != "" {
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img, err := daemon.stores[container.Platform].imageStore.Get(container.ImageID)
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if err != nil {
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return err
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}
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layerID = img.RootFS.ChainID()
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}
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rwLayerOpts := &layer.CreateRWLayerOpts{
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MountLabel: container.MountLabel,
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InitFunc: daemon.getLayerInit(),
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StorageOpt: container.HostConfig.StorageOpt,
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}
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rwLayer, err := daemon.stores[container.Platform].layerStore.CreateRWLayer(container.ID, layerID, rwLayerOpts)
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if err != nil {
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return err
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}
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container.RWLayer = rwLayer
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return nil
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}
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// VolumeCreate creates a volume with the specified name, driver, and opts
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// This is called directly from the Engine API
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func (daemon *Daemon) VolumeCreate(name, driverName string, opts, labels map[string]string) (*types.Volume, error) {
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if name == "" {
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name = stringid.GenerateNonCryptoID()
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}
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v, err := daemon.volumes.Create(name, driverName, opts, labels)
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if err != nil {
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return nil, err
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}
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daemon.LogVolumeEvent(v.Name(), "create", map[string]string{"driver": v.DriverName()})
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apiV := volumeToAPIType(v)
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apiV.Mountpoint = v.Path()
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return apiV, nil
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}
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func (daemon *Daemon) mergeAndVerifyConfig(config *containertypes.Config, img *image.Image) error {
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if img != nil && img.Config != nil {
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if err := merge(config, img.Config); err != nil {
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return err
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}
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}
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// Reset the Entrypoint if it is [""]
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if len(config.Entrypoint) == 1 && config.Entrypoint[0] == "" {
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config.Entrypoint = nil
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}
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if len(config.Entrypoint) == 0 && len(config.Cmd) == 0 {
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return fmt.Errorf("No command specified")
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}
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return nil
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}
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// Checks if the client set configurations for more than one network while creating a container
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// Also checks if the IPAMConfig is valid
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func (daemon *Daemon) verifyNetworkingConfig(nwConfig *networktypes.NetworkingConfig) error {
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if nwConfig == nil || len(nwConfig.EndpointsConfig) == 0 {
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return nil
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}
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if len(nwConfig.EndpointsConfig) == 1 {
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for _, v := range nwConfig.EndpointsConfig {
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if v != nil && v.IPAMConfig != nil {
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if v.IPAMConfig.IPv4Address != "" && net.ParseIP(v.IPAMConfig.IPv4Address).To4() == nil {
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return apierrors.NewBadRequestError(fmt.Errorf("invalid IPv4 address: %s", v.IPAMConfig.IPv4Address))
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}
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if v.IPAMConfig.IPv6Address != "" {
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n := net.ParseIP(v.IPAMConfig.IPv6Address)
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// if the address is an invalid network address (ParseIP == nil) or if it is
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// an IPv4 address (To4() != nil), then it is an invalid IPv6 address
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if n == nil || n.To4() != nil {
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return apierrors.NewBadRequestError(fmt.Errorf("invalid IPv6 address: %s", v.IPAMConfig.IPv6Address))
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}
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}
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}
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}
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return nil
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}
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l := make([]string, 0, len(nwConfig.EndpointsConfig))
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for k := range nwConfig.EndpointsConfig {
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l = append(l, k)
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}
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err := fmt.Errorf("Container cannot be connected to network endpoints: %s", strings.Join(l, ", "))
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return apierrors.NewBadRequestError(err)
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}
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