76 lines
1.8 KiB
Go
76 lines
1.8 KiB
Go
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package validate
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import (
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"fmt"
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"path/filepath"
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"github.com/docker/libcontainer/configs"
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)
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type Validator interface {
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Validate(*configs.Config) error
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}
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func New() Validator {
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return &ConfigValidator{}
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}
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type ConfigValidator struct {
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}
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func (v *ConfigValidator) Validate(config *configs.Config) error {
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if err := v.rootfs(config); err != nil {
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return err
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}
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if err := v.network(config); err != nil {
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return err
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}
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if err := v.hostname(config); err != nil {
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return err
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}
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if err := v.security(config); err != nil {
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return err
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}
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return nil
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}
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// rootfs validates the the rootfs is an absolute path and is not a symlink
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// to the container's root filesystem.
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func (v *ConfigValidator) rootfs(config *configs.Config) error {
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cleaned, err := filepath.Abs(config.Rootfs)
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if err != nil {
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return err
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}
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if cleaned, err = filepath.EvalSymlinks(cleaned); err != nil {
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return err
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}
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if config.Rootfs != cleaned {
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return fmt.Errorf("%s is not an absolute path or is a symlink", config.Rootfs)
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}
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return nil
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}
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func (v *ConfigValidator) network(config *configs.Config) error {
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if !config.Namespaces.Contains(configs.NEWNET) {
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if len(config.Networks) > 0 || len(config.Routes) > 0 {
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return fmt.Errorf("unable to apply network settings without a private NET namespace")
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}
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}
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return nil
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}
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func (v *ConfigValidator) hostname(config *configs.Config) error {
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if config.Hostname != "" && !config.Namespaces.Contains(configs.NEWUTS) {
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return fmt.Errorf("unable to set hostname without a private UTS namespace")
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}
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return nil
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}
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func (v *ConfigValidator) security(config *configs.Config) error {
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// restrict sys without mount namespace
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if config.RestrictSys && !config.Namespaces.Contains(configs.NEWNS) {
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return fmt.Errorf("unable to restrict sys entries without a private MNT namespace")
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}
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return nil
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}
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