github.com/mforkel/docker-ce-i386@v17.12.1-ce-rc2+incompatible/components/engine/runconfig/config.go (about)

     1  package runconfig
     2  
     3  import (
     4  	"encoding/json"
     5  	"io"
     6  
     7  	"github.com/docker/docker/api/types/container"
     8  	networktypes "github.com/docker/docker/api/types/network"
     9  	"github.com/docker/docker/pkg/sysinfo"
    10  )
    11  
    12  // ContainerDecoder implements httputils.ContainerDecoder
    13  // calling DecodeContainerConfig.
    14  type ContainerDecoder struct{}
    15  
    16  // DecodeConfig makes ContainerDecoder to implement httputils.ContainerDecoder
    17  func (r ContainerDecoder) DecodeConfig(src io.Reader) (*container.Config, *container.HostConfig, *networktypes.NetworkingConfig, error) {
    18  	return decodeContainerConfig(src)
    19  }
    20  
    21  // DecodeHostConfig makes ContainerDecoder to implement httputils.ContainerDecoder
    22  func (r ContainerDecoder) DecodeHostConfig(src io.Reader) (*container.HostConfig, error) {
    23  	return decodeHostConfig(src)
    24  }
    25  
    26  // decodeContainerConfig decodes a json encoded config into a ContainerConfigWrapper
    27  // struct and returns both a Config and a HostConfig struct
    28  // Be aware this function is not checking whether the resulted structs are nil,
    29  // it's your business to do so
    30  func decodeContainerConfig(src io.Reader) (*container.Config, *container.HostConfig, *networktypes.NetworkingConfig, error) {
    31  	var w ContainerConfigWrapper
    32  
    33  	decoder := json.NewDecoder(src)
    34  	if err := decoder.Decode(&w); err != nil {
    35  		return nil, nil, nil, err
    36  	}
    37  
    38  	hc := w.getHostConfig()
    39  
    40  	// Perform platform-specific processing of Volumes and Binds.
    41  	if w.Config != nil && hc != nil {
    42  
    43  		// Initialize the volumes map if currently nil
    44  		if w.Config.Volumes == nil {
    45  			w.Config.Volumes = make(map[string]struct{})
    46  		}
    47  	}
    48  
    49  	// Certain parameters need daemon-side validation that cannot be done
    50  	// on the client, as only the daemon knows what is valid for the platform.
    51  	if err := validateNetMode(w.Config, hc); err != nil {
    52  		return nil, nil, nil, err
    53  	}
    54  
    55  	// Validate isolation
    56  	if err := validateIsolation(hc); err != nil {
    57  		return nil, nil, nil, err
    58  	}
    59  
    60  	// Validate QoS
    61  	if err := validateQoS(hc); err != nil {
    62  		return nil, nil, nil, err
    63  	}
    64  
    65  	// Validate Resources
    66  	if err := validateResources(hc, sysinfo.New(true)); err != nil {
    67  		return nil, nil, nil, err
    68  	}
    69  
    70  	// Validate Privileged
    71  	if err := validatePrivileged(hc); err != nil {
    72  		return nil, nil, nil, err
    73  	}
    74  
    75  	// Validate ReadonlyRootfs
    76  	if err := validateReadonlyRootfs(hc); err != nil {
    77  		return nil, nil, nil, err
    78  	}
    79  
    80  	return w.Config, hc, w.NetworkingConfig, nil
    81  }