1
0
Fork 0
mirror of https://github.com/moby/moby.git synced 2022-11-09 12:21:53 -05:00
moby--moby/runconfig/config.go

104 lines
4.4 KiB
Go
Raw Normal View History

package runconfig
import (
"encoding/json"
"fmt"
"io"
"github.com/docker/docker/pkg/nat"
"github.com/docker/docker/pkg/stringutils"
"github.com/docker/docker/volume"
)
// Config contains the configuration data about a container.
// It should hold only portable information about the container.
// Here, "portable" means "independent from the host we are running on".
// Non-portable information *should* appear in HostConfig.
// All fields added to this struct must be marked `omitempty` to keep getting
// predictable hashes from the old `v1Compatibility` configuration.
type Config struct {
Hostname string // Hostname
Domainname string // Domainname
User string // User that will run the command(s) inside the container
AttachStdin bool // Attach the standard input, makes possible user interaction
AttachStdout bool // Attach the standard output
AttachStderr bool // Attach the standard error
ExposedPorts map[nat.Port]struct{} `json:",omitempty"` // List of exposed ports
PublishService string `json:",omitempty"` // Name of the network service exposed by the container
Tty bool // Attach standard streams to a tty, including stdin if it is not closed.
OpenStdin bool // Open stdin
StdinOnce bool // If true, close stdin after the 1 attached client disconnects.
Env []string // List of environment variable to set in the container
Cmd *stringutils.StrSlice // Command to run when starting the container
ArgsEscaped bool `json:",omitempty"` // True if command is already escaped (Windows specific)
Image string // Name of the image as it was passed by the operator (eg. could be symbolic)
Volumes map[string]struct{} // List of volumes (mounts) used for the container
WorkingDir string // Current directory (PWD) in the command will be launched
Entrypoint *stringutils.StrSlice // Entrypoint to run when starting the container
NetworkDisabled bool `json:",omitempty"` // Is network disabled
MacAddress string `json:",omitempty"` // Mac Address of the container
OnBuild []string // ONBUILD metadata that were defined on the image Dockerfile
Labels map[string]string // List of labels set to this container
StopSignal string `json:",omitempty"` // Signal to stop a container
}
// DecodeContainerConfig decodes a json encoded config into a ContainerConfigWrapper
// struct and returns both a Config and an 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) (*Config, *HostConfig, error) {
var w ContainerConfigWrapper
decoder := json.NewDecoder(src)
if err := decoder.Decode(&w); err != nil {
return 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, 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, err
}
// Validate the isolation level
if err := ValidateIsolationLevel(hc); err != nil {
return nil, nil, err
}
return w.Config, hc, nil
}
// validateVolumesAndBindSettings validates each of the volumes and bind settings
// passed by the caller to ensure they are valid.
func validateVolumesAndBindSettings(c *Config, hc *HostConfig) error {
// Ensure all volumes and binds are valid.
for spec := range c.Volumes {
if _, err := volume.ParseMountSpec(spec, hc.VolumeDriver); err != nil {
return fmt.Errorf("Invalid volume spec %q: %v", spec, err)
}
}
for _, spec := range hc.Binds {
if _, err := volume.ParseMountSpec(spec, hc.VolumeDriver); err != nil {
return fmt.Errorf("Invalid bind mount spec %q: %v", spec, err)
}
}
return nil
}