// ContainerStart starts a container.
func (daemon *Daemon) ContainerStart(name string, hostConfig *containertypes.HostConfig) error {
container, err := daemon.GetContainer(name)
if err != nil {
return err
}
if container.IsPaused() {
return fmt.Errorf("Cannot start a paused container, try unpause instead.")
}
if container.IsRunning() {
err := fmt.Errorf("Container already started")
return errors.NewErrorWithStatusCode(err, http.StatusNotModified)
}
// Windows does not have the backwards compatibility issue here.
if runtime.GOOS != "windows" {
// This is kept for backward compatibility - hostconfig should be passed when
// creating a container, not during start.
if hostConfig != nil {
logrus.Warn("DEPRECATED: Setting host configuration options when the container starts is deprecated and will be removed in Docker 1.12")
oldNetworkMode := container.HostConfig.NetworkMode
if err := daemon.setSecurityOptions(container, hostConfig); err != nil {
return err
}
if err := daemon.setHostConfig(container, hostConfig); err != nil {
return err
}
newNetworkMode := container.HostConfig.NetworkMode
if string(oldNetworkMode) != string(newNetworkMode) {
// if user has change the network mode on starting, clean up the
// old networks. It is a deprecated feature and will be removed in Docker 1.12
container.NetworkSettings.Networks = nil
if err := container.ToDisk(); err != nil {
return err
}
}
container.InitDNSHostConfig()
}
} else {
if hostConfig != nil {
return fmt.Errorf("Supplying a hostconfig on start is not supported. It should be supplied on create")
}
}
// check if hostConfig is in line with the current system settings.
// It may happen cgroups are umounted or the like.
if _, err = daemon.verifyContainerSettings(container.HostConfig, nil, false); err != nil {
return err
}
// Adapt for old containers in case we have updates in this function and
// old containers never have chance to call the new function in create stage.
if err := daemon.adaptContainerSettings(container.HostConfig, false); err != nil {
return err
}
return daemon.containerStart(container)
}
// ContainerStart starts a container.
func (daemon *Daemon) ContainerStart(name string, hostConfig *runconfig.HostConfig) error {
container, err := daemon.Get(name)
if err != nil {
return err
}
if container.IsPaused() {
return derr.ErrorCodeStartPaused
}
if container.IsRunning() {
return derr.ErrorCodeAlreadyStarted
}
// Windows does not have the backwards compatibility issue here.
if runtime.GOOS != "windows" {
// This is kept for backward compatibility - hostconfig should be passed when
// creating a container, not during start.
if hostConfig != nil {
logrus.Warn("DEPRECATED: Setting host configuration options when the container starts is deprecated and will be removed in Docker 1.12")
container.Lock()
if err := parseSecurityOpt(container, hostConfig); err != nil {
container.Unlock()
return err
}
container.Unlock()
if err := daemon.adaptContainerSettings(hostConfig, false); err != nil {
return err
}
if err := daemon.setHostConfig(container, hostConfig); err != nil {
return err
}
container.InitDNSHostConfig()
}
} else {
if hostConfig != nil {
return derr.ErrorCodeHostConfigStart
}
}
// check if hostConfig is in line with the current system settings.
// It may happen cgroups are umounted or the like.
if _, err = daemon.verifyContainerSettings(container.HostConfig, nil); err != nil {
return err
}
if err := daemon.containerStart(container); err != nil {
return err
}
return nil
}