80 lines
2.2 KiB
Go
80 lines
2.2 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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"strings"
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"github.com/docker/docker/api/types/container"
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)
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// DecodeHostConfig creates a HostConfig based on the specified Reader.
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// It assumes the content of the reader will be JSON, and decodes it.
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func DecodeHostConfig(src io.Reader) (*container.HostConfig, error) {
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decoder := json.NewDecoder(src)
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var w ContainerConfigWrapper
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if err := decoder.Decode(&w); err != nil {
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return nil, err
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}
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hc := w.getHostConfig()
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return hc, nil
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}
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// SetDefaultNetModeIfBlank changes the NetworkMode in a HostConfig structure
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// to default if it is not populated. This ensures backwards compatibility after
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// the validation of the network mode was moved from the docker CLI to the
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// docker daemon.
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func SetDefaultNetModeIfBlank(hc *container.HostConfig) {
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if hc != nil {
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if hc.NetworkMode == container.NetworkMode("") {
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hc.NetworkMode = container.NetworkMode("default")
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}
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}
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}
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// validateNetContainerMode ensures that the various combinations of requested
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// network settings wrt container mode are valid.
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func validateNetContainerMode(c *container.Config, hc *container.HostConfig) error {
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// We may not be passed a host config, such as in the case of docker commit
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if hc == nil {
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return nil
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}
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parts := strings.Split(string(hc.NetworkMode), ":")
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if parts[0] == "container" {
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if len(parts) < 2 || parts[1] == "" {
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return fmt.Errorf("--net: invalid net mode: invalid container format container:<name|id>")
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}
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}
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if hc.NetworkMode.IsContainer() && c.Hostname != "" {
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return ErrConflictNetworkHostname
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}
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if hc.NetworkMode.IsContainer() && len(hc.Links) > 0 {
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return ErrConflictContainerNetworkAndLinks
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}
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if hc.NetworkMode.IsContainer() && len(hc.DNS) > 0 {
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return ErrConflictNetworkAndDNS
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}
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if hc.NetworkMode.IsContainer() && len(hc.ExtraHosts) > 0 {
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return ErrConflictNetworkHosts
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}
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if (hc.NetworkMode.IsContainer() || hc.NetworkMode.IsHost()) && c.MacAddress != "" {
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return ErrConflictContainerNetworkAndMac
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}
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if hc.NetworkMode.IsContainer() && (len(hc.PortBindings) > 0 || hc.PublishAllPorts == true) {
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return ErrConflictNetworkPublishPorts
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}
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if hc.NetworkMode.IsContainer() && len(c.ExposedPorts) > 0 {
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return ErrConflictNetworkExposePorts
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}
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return nil
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}
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