70 lines
2 KiB
Go
70 lines
2 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/volume"
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"github.com/docker/engine-api/types/container"
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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 an 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, 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, 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 := validateVolumesAndBindSettings(w.Config, hc); err != nil {
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return 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, err
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}
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// Validate the isolation level
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if err := ValidateIsolationLevel(hc); err != nil {
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return nil, nil, err
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}
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return w.Config, hc, nil
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}
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// validateVolumesAndBindSettings 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 validateVolumesAndBindSettings(c *container.Config, hc *container.HostConfig) error {
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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.ParseMountSpec(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.ParseMountSpec(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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