package runconfig import ( "encoding/json" "fmt" "io" "github.com/docker/docker/api/types/container" networktypes "github.com/docker/docker/api/types/network" "github.com/docker/docker/volume" ) // ContainerDecoder implements httputils.ContainerDecoder // calling DecodeContainerConfig. type ContainerDecoder struct{} // DecodeConfig makes ContainerDecoder to implement httputils.ContainerDecoder func (r ContainerDecoder) DecodeConfig(src io.Reader) (*container.Config, *container.HostConfig, *networktypes.NetworkingConfig, error) { return DecodeContainerConfig(src) } // DecodeHostConfig makes ContainerDecoder to implement httputils.ContainerDecoder func (r ContainerDecoder) DecodeHostConfig(src io.Reader) (*container.HostConfig, error) { return DecodeHostConfig(src) } // DecodeContainerConfig decodes a json encoded config into a ContainerConfigWrapper // struct and returns both a Config and a HostConfig struct // Be aware this function is not checking whether the resulted structs are nil, // it's your business to do so func DecodeContainerConfig(src io.Reader) (*container.Config, *container.HostConfig, *networktypes.NetworkingConfig, error) { var w ContainerConfigWrapper decoder := json.NewDecoder(src) if err := decoder.Decode(&w); err != nil { return nil, nil, nil, err } hc := w.getHostConfig() // Perform platform-specific processing of Volumes and Binds. if w.Config != nil && hc != nil { // Initialize the volumes map if currently nil if w.Config.Volumes == nil { w.Config.Volumes = make(map[string]struct{}) } // Now validate all the volumes and binds if err := validateVolumesAndBindSettings(w.Config, hc); err != nil { return nil, nil, nil, err } } // Certain parameters need daemon-side validation that cannot be done // on the client, as only the daemon knows what is valid for the platform. if err := ValidateNetMode(w.Config, hc); err != nil { return nil, nil, nil, err } // Validate isolation if err := ValidateIsolation(hc); err != nil { return nil, nil, nil, err } // Validate QoS if err := ValidateQoS(hc); err != nil { return nil, nil, nil, err } return w.Config, hc, w.NetworkingConfig, nil } // validateVolumesAndBindSettings validates each of the volumes and bind settings // passed by the caller to ensure they are valid. func validateVolumesAndBindSettings(c *container.Config, hc *container.HostConfig) error { if len(hc.Mounts) > 0 { if len(hc.Binds) > 0 { return conflictError(fmt.Errorf("must not specify both Binds and Mounts")) } if len(c.Volumes) > 0 { return conflictError(fmt.Errorf("must not specify both Volumes and Mounts")) } if len(hc.VolumeDriver) > 0 { return conflictError(fmt.Errorf("must not specify both VolumeDriver and Mounts")) } } // Ensure all volumes and binds are valid. for spec := range c.Volumes { if _, err := volume.ParseMountRaw(spec, hc.VolumeDriver); err != nil { return fmt.Errorf("invalid volume spec %q: %v", spec, err) } } for _, spec := range hc.Binds { if _, err := volume.ParseMountRaw(spec, hc.VolumeDriver); err != nil { return fmt.Errorf("invalid bind mount spec %q: %v", spec, err) } } return nil }