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