mirror of
https://github.com/moby/moby.git
synced 2022-11-09 12:21:53 -05:00
350 lines
11 KiB
Go
350 lines
11 KiB
Go
package daemon // import "github.com/docker/docker/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/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/errdefs"
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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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"github.com/sirupsen/logrus"
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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{}, errdefs.InvalidParameter(errors.New("Config cannot be empty in order to create a container"))
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}
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os := runtime.GOOS
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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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os = img.OS
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}
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} else {
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// This mean scratch. On Windows, we can safely assume that this is a linux
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// container. On other platforms, it's the host OS (which it already is)
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if runtime.GOOS == "windows" && system.LCOWSupported() {
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os = "linux"
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}
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}
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warnings, err := daemon.verifyContainerSettings(os, params.HostConfig, params.Config, false)
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if err != nil {
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return containertypes.ContainerCreateCreatedBody{Warnings: warnings}, errdefs.InvalidParameter(err)
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}
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err = verifyNetworkingConfig(params.NetworkingConfig)
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if err != nil {
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return containertypes.ContainerCreateCreatedBody{Warnings: warnings}, errdefs.InvalidParameter(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}, errdefs.InvalidParameter(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}, 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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os := runtime.GOOS
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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 img.OS != "" {
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os = img.OS
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} else {
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// default to the host OS except on Windows with LCOW
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if runtime.GOOS == "windows" && system.LCOWSupported() {
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os = "linux"
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}
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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("operating system on which parent image was created is not Windows")
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}
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} else {
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if runtime.GOOS == "windows" {
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os = "linux" // 'scratch' case.
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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, errdefs.InvalidParameter(err)
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}
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if err := daemon.mergeAndVerifyLogConfig(¶ms.HostConfig.LogConfig); err != nil {
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return nil, errdefs.InvalidParameter(err)
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}
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if container, err = daemon.newContainer(params.Name, os, 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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// Fixes: https://github.com/moby/moby/issues/34074 and
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// https://github.com/docker/for-win/issues/999.
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// Merge the daemon's storage options if they aren't already present. We only
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// do this on Windows as there's no effective sandbox size limit other than
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// physical on Linux.
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if runtime.GOOS == "windows" {
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if container.HostConfig.StorageOpt == nil {
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container.HostConfig.StorageOpt = make(map[string]string)
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}
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for _, v := range daemon.configStore.GraphOptions {
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opt := strings.SplitN(v, "=", 2)
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if _, ok := container.HostConfig.StorageOpt[opt[0]]; !ok {
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container.HostConfig.StorageOpt[opt[0]] = opt[1]
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}
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}
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}
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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, errdefs.System(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.createContainerOSSpecificSettings(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 := daemon.Register(container); err != nil {
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return nil, err
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}
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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.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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// Indexing by OS is safe here as validation of OS has already been performed in create() (the only
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// caller), and guaranteed non-nil
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rwLayer, err := daemon.layerStores[container.OS].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 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 k, v := range nwConfig.EndpointsConfig {
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if v == nil {
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return errdefs.InvalidParameter(errors.Errorf("no EndpointSettings for %s", k))
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}
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if v.IPAMConfig != nil {
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if v.IPAMConfig.IPv4Address != "" && net.ParseIP(v.IPAMConfig.IPv4Address).To4() == nil {
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return errors.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 errors.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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return errors.Errorf("Container cannot be connected to network endpoints: %s", strings.Join(l, ", "))
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}
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